linux-kernel - Re: memory leak in bio_clone

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Message-Id: <20190813143348.faeb28c7f59eefc52875eb8f@linux-foundation.org>
Date:   Tue, 13 Aug 2019 14:33:48 -0700
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     syzbot <syzbot+0265846a0cb9a0547905@...kaller.appspotmail.com>
Cc:     baijiaju1990@...il.com, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, mhocko@...e.com, rppt@...ux.ibm.com,
        syzkaller-bugs@...glegroups.com, willy@...radead.org,
        Kent Overstreet <kent.overstreet@...il.com>,
        Jens Axboe <axboe@...nel.dk>
Subject: Re: memory leak in bio_clone_fast

(cc's added)

On Tue, 13 Aug 2019 14:08:06 -0700 syzbot <syzbot+0265846a0cb9a0547905@...kaller.appspotmail.com> wrote:

> Hello,
> 
> syzbot found the following crash on:
> 
> HEAD commit:    d45331b0 Linux 5.3-rc4
> git tree:       upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=1651e6d2600000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=6c5e70dcab57c6af
> dashboard link: https://syzkaller.appspot.com/bug?extid=0265846a0cb9a0547905
> compiler:       gcc (GCC) 9.0.0 20181231 (experimental)
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=12c9c336600000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1766156a600000
> 
> IMPORTANT: if you fix the bug, please add the following tag to the commit:
> Reported-by: syzbot+0265846a0cb9a0547905@...kaller.appspotmail.com
> 
> executing program
> executing program
> executing program
> executing program
> BUG: memory leak
> unreferenced object 0xffff8881226da6c0 (size 192):
>    comm "syz-executor332", pid 6977, jiffies 4294941214 (age 15.840s)
>    hex dump (first 32 bytes):
>      00 00 00 00 00 00 00 00 00 f0 bc 28 81 88 ff ff  ...........(....
>      01 c8 60 00 02 0b 00 00 00 00 00 00 00 00 00 00  ..`.............
>    backtrace:
>      [<00000000b06a638e>] kmemleak_alloc_recursive  
> include/linux/kmemleak.h:43 [inline]
>      [<00000000b06a638e>] slab_post_alloc_hook mm/slab.h:522 [inline]
>      [<00000000b06a638e>] slab_alloc mm/slab.c:3319 [inline]
>      [<00000000b06a638e>] kmem_cache_alloc+0x13f/0x2c0 mm/slab.c:3483
>      [<00000000950a289d>] mempool_alloc_slab+0x1e/0x30 mm/mempool.c:513
>      [<00000000bfcc27e2>] mempool_alloc+0x64/0x1b0 mm/mempool.c:393
>      [<00000000cdf95a4a>] bio_alloc_bioset+0x180/0x2c0 block/bio.c:477
>      [<00000000b239bb68>] bio_clone_fast+0x25/0x90 block/bio.c:609
>      [<000000005d58c2dc>] bio_split+0x4a/0xd0 block/bio.c:1856
>      [<00000000ab943734>] blk_bio_segment_split block/blk-merge.c:250  
> [inline]
>      [<00000000ab943734>] __blk_queue_split+0x355/0x730 block/blk-merge.c:272
>      [<00000000e702c0ac>] blk_mq_make_request+0xb0/0x890 block/blk-mq.c:1943
>      [<000000003c89773a>] generic_make_request block/blk-core.c:1052 [inline]
>      [<000000003c89773a>] generic_make_request+0xf6/0x4a0  
> block/blk-core.c:994
>      [<00000000a4dcaf78>] submit_bio+0x5a/0x1e0 block/blk-core.c:1163
>      [<000000003e1ce7f8>] __blkdev_direct_IO fs/block_dev.c:459 [inline]
>      [<000000003e1ce7f8>] blkdev_direct_IO+0x2b3/0x6d0 fs/block_dev.c:515
>      [<0000000087ec76a4>] generic_file_direct_write+0xb0/0x1a0  
> mm/filemap.c:3230
>      [<00000000ff259b44>] __generic_file_write_iter+0xec/0x230  
> mm/filemap.c:3413
>      [<00000000223d9b6c>] blkdev_write_iter fs/block_dev.c:2026 [inline]
>      [<00000000223d9b6c>] blkdev_write_iter+0xbe/0x160 fs/block_dev.c:2003
>      [<000000003c4a5c94>] call_write_iter include/linux/fs.h:1870 [inline]
>      [<000000003c4a5c94>] aio_write+0x10b/0x1d0 fs/aio.c:1583
>      [<00000000581f0c84>] __io_submit_one fs/aio.c:1815 [inline]
>      [<00000000581f0c84>] io_submit_one+0x59b/0xe50 fs/aio.c:1862
> 
> BUG: memory leak
> unreferenced object 0xffff8881226da600 (size 192):
>    comm "syz-executor332", pid 6977, jiffies 4294941214 (age 15.840s)
>    hex dump (first 32 bytes):
>      00 00 00 00 00 00 00 00 00 f0 bc 28 81 88 ff ff  ...........(....
>      01 c8 60 00 02 0b 00 00 00 00 00 00 00 00 00 00  ..`.............
>    backtrace:
>      [<00000000b06a638e>] kmemleak_alloc_recursive  
> include/linux/kmemleak.h:43 [inline]
>      [<00000000b06a638e>] slab_post_alloc_hook mm/slab.h:522 [inline]
>      [<00000000b06a638e>] slab_alloc mm/slab.c:3319 [inline]
>      [<00000000b06a638e>] kmem_cache_alloc+0x13f/0x2c0 mm/slab.c:3483
>      [<00000000950a289d>] mempool_alloc_slab+0x1e/0x30 mm/mempool.c:513
>      [<00000000bfcc27e2>] mempool_alloc+0x64/0x1b0 mm/mempool.c:393
>      [<00000000cdf95a4a>] bio_alloc_bioset+0x180/0x2c0 block/bio.c:477
>      [<00000000b239bb68>] bio_clone_fast+0x25/0x90 block/bio.c:609
>      [<000000005d58c2dc>] bio_split+0x4a/0xd0 block/bio.c:1856
>      [<00000000ab943734>] blk_bio_segment_split block/blk-merge.c:250  
> [inline]
>      [<00000000ab943734>] __blk_queue_split+0x355/0x730 block/blk-merge.c:272
>      [<00000000e702c0ac>] blk_mq_make_request+0xb0/0x890 block/blk-mq.c:1943
>      [<000000003c89773a>] generic_make_request block/blk-core.c:1052 [inline]
>      [<000000003c89773a>] generic_make_request+0xf6/0x4a0  
> block/blk-core.c:994
>      [<00000000a4dcaf78>] submit_bio+0x5a/0x1e0 block/blk-core.c:1163
>      [<000000003e1ce7f8>] __blkdev_direct_IO fs/block_dev.c:459 [inline]
>      [<000000003e1ce7f8>] blkdev_direct_IO+0x2b3/0x6d0 fs/block_dev.c:515
>      [<0000000087ec76a4>] generic_file_direct_write+0xb0/0x1a0  
> mm/filemap.c:3230
>      [<00000000ff259b44>] __generic_file_write_iter+0xec/0x230  
> mm/filemap.c:3413
>      [<00000000223d9b6c>] blkdev_write_iter fs/block_dev.c:2026 [inline]
>      [<00000000223d9b6c>] blkdev_write_iter+0xbe/0x160 fs/block_dev.c:2003
>      [<000000003c4a5c94>] call_write_iter include/linux/fs.h:1870 [inline]
>      [<000000003c4a5c94>] aio_write+0x10b/0x1d0 fs/aio.c:1583
>      [<00000000581f0c84>] __io_submit_one fs/aio.c:1815 [inline]
>      [<00000000581f0c84>] io_submit_one+0x59b/0xe50 fs/aio.c:1862
> 
> BUG: memory leak
> unreferenced object 0xffff8881226da540 (size 192):
>    comm "syz-executor332", pid 6977, jiffies 4294941214 (age 15.840s)
>    hex dump (first 32 bytes):
>      00 00 00 00 00 00 00 00 00 f0 bc 28 81 88 ff ff  ...........(....
>      01 c8 60 00 02 0b 00 00 00 00 00 00 00 00 00 00  ..`.............
>    backtrace:
>      [<00000000b06a638e>] kmemleak_alloc_recursive  
> include/linux/kmemleak.h:43 [inline]
>      [<00000000b06a638e>] slab_post_alloc_hook mm/slab.h:522 [inline]
>      [<00000000b06a638e>] slab_alloc mm/slab.c:3319 [inline]
>      [<00000000b06a638e>] kmem_cache_alloc+0x13f/0x2c0 mm/slab.c:3483
>      [<00000000950a289d>] mempool_alloc_slab+0x1e/0x30 mm/mempool.c:513
>      [<00000000bfcc27e2>] mempool_alloc+0x64/0x1b0 mm/mempool.c:393
>      [<00000000cdf95a4a>] bio_alloc_bioset+0x180/0x2c0 block/bio.c:477
>      [<00000000b239bb68>] bio_clone_fast+0x25/0x90 block/bio.c:609
>      [<000000005d58c2dc>] bio_split+0x4a/0xd0 block/bio.c:1856
>      [<00000000ab943734>] blk_bio_segment_split block/blk-merge.c:250  
> [inline]
>      [<00000000ab943734>] __blk_queue_split+0x355/0x730 block/blk-merge.c:272
>      [<00000000e702c0ac>] blk_mq_make_request+0xb0/0x890 block/blk-mq.c:1943
>      [<000000003c89773a>] generic_make_request block/blk-core.c:1052 [inline]
>      [<000000003c89773a>] generic_make_request+0xf6/0x4a0  
> block/blk-core.c:994
>      [<00000000a4dcaf78>] submit_bio+0x5a/0x1e0 block/blk-core.c:1163
>      [<000000003e1ce7f8>] __blkdev_direct_IO fs/block_dev.c:459 [inline]
>      [<000000003e1ce7f8>] blkdev_direct_IO+0x2b3/0x6d0 fs/block_dev.c:515
>      [<0000000087ec76a4>] generic_file_direct_write+0xb0/0x1a0  
> mm/filemap.c:3230
>      [<00000000ff259b44>] __generic_file_write_iter+0xec/0x230  
> mm/filemap.c:3413
>      [<00000000223d9b6c>] blkdev_write_iter fs/block_dev.c:2026 [inline]
>      [<00000000223d9b6c>] blkdev_write_iter+0xbe/0x160 fs/block_dev.c:2003
>      [<000000003c4a5c94>] call_write_iter include/linux/fs.h:1870 [inline]
>      [<000000003c4a5c94>] aio_write+0x10b/0x1d0 fs/aio.c:1583
>      [<00000000581f0c84>] __io_submit_one fs/aio.c:1815 [inline]
>      [<00000000581f0c84>] io_submit_one+0x59b/0xe50 fs/aio.c:1862
> 
> BUG: memory leak
> unreferenced object 0xffff8881226da6c0 (size 192):
>    comm "syz-executor332", pid 6977, jiffies 4294941214 (age 16.750s)
>    hex dump (first 32 bytes):
>      00 00 00 00 00 00 00 00 00 f0 bc 28 81 88 ff ff  ...........(....
>      01 c8 60 00 02 0b 00 00 00 00 00 00 00 00 00 00  ..`.............
>    backtrace:
>      [<00000000b06a638e>] kmemleak_alloc_recursive  
> include/linux/kmemleak.h:43 [inline]
>      [<00000000b06a638e>] slab_post_alloc_hook mm/slab.h:522 [inline]
>      [<00000000b06a638e>] slab_alloc mm/slab.c:3319 [inline]
>      [<00000000b06a638e>] kmem_cache_alloc+0x13f/0x2c0 mm/slab.c:3483
>      [<00000000950a289d>] mempool_alloc_slab+0x1e/0x30 mm/mempool.c:513
>      [<00000000bfcc27e2>] mempool_alloc+0x64/0x1b0 mm/mempool.c:393
>      [<00000000cdf95a4a>] bio_alloc_bioset+0x180/0x2c0 block/bio.c:477
>      [<00000000b239bb68>] bio_clone_fast+0x25/0x90 block/bio.c:609
>      [<000000005d58c2dc>] bio_split+0x4a/0xd0 block/bio.c:1856
>      [<00000000ab943734>] blk_bio_segment_split block/blk-merge.c:250  
> [inline]
>      [<00000000ab943734>] __blk_queue_split+0x355/0x730 block/blk-merge.c:272
>      [<00000000e702c0ac>] blk_mq_make_request+0xb0/0x890 block/blk-mq.c:1943
>      [<000000003c89773a>] generic_make_request block/blk-core.c:1052 [inline]
>      [<000000003c89773a>] generic_make_request+0xf6/0x4a0  
> block/blk-core.c:994
>      [<00000000a4dcaf78>] submit_bio+0x5a/0x1e0 block/blk-core.c:1163
>      [<000000003e1ce7f8>] __blkdev_direct_IO fs/block_dev.c:459 [inline]
>      [<000000003e1ce7f8>] blkdev_direct_IO+0x2b3/0x6d0 fs/block_dev.c:515
>      [<0000000087ec76a4>] generic_file_direct_write+0xb0/0x1a0  
> mm/filemap.c:3230
>      [<00000000ff259b44>] __generic_file_write_iter+0xec/0x230  
> mm/filemap.c:3413
>      [<00000000223d9b6c>] blkdev_write_iter fs/block_dev.c:2026 [inline]
>      [<00000000223d9b6c>] blkdev_write_iter+0xbe/0x160 fs/block_dev.c:2003
>      [<000000003c4a5c94>] call_write_iter include/linux/fs.h:1870 [inline]
>      [<000000003c4a5c94>] aio_write+0x10b/0x1d0 fs/aio.c:1583
>      [<00000000581f0c84>] __io_submit_one fs/aio.c:1815 [inline]
>      [<00000000581f0c84>] io_submit_one+0x59b/0xe50 fs/aio.c:1862
> 
> BUG: memory leak
> unreferenced object 0xffff8881226da600 (size 192):
>    comm "syz-executor332", pid 6977, jiffies 4294941214 (age 16.750s)
>    hex dump (first 32 bytes):
>      00 00 00 00 00 00 00 00 00 f0 bc 28 81 88 ff ff  ...........(....
>      01 c8 60 00 02 0b 00 00 00 00 00 00 00 00 00 00  ..`.............
>    backtrace:
>      [<00000000b06a638e>] kmemleak_alloc_recursive  
> include/linux/kmemleak.h:43 [inline]
>      [<00000000b06a638e>] slab_post_alloc_hook mm/slab.h:522 [inline]
>      [<00000000b06a638e>] slab_alloc mm/slab.c:3319 [inline]
>      [<00000000b06a638e>] kmem_cache_alloc+0x13f/0x2c0 mm/slab.c:3483
>      [<00000000950a289d>] mempool_alloc_slab+0x1e/0x30 mm/mempool.c:513
>      [<00000000bfcc27e2>] mempool_alloc+0x64/0x1b0 mm/mempool.c:393
>      [<00000000cdf95a4a>] bio_alloc_bioset+0x180/0x2c0 block/bio.c:477
>      [<00000000b239bb68>] bio_clone_fast+0x25/0x90 block/bio.c:609
>      [<000000005d58c2dc>] bio_split+0x4a/0xd0 block/bio.c:1856
>      [<00000000ab943734>] blk_bio_segment_split block/blk-merge.c:250  
> [inline]
>      [<00000000ab943734>] __blk_queue_split+0x355/0x730 block/blk-merge.c:272
>      [<00000000e702c0ac>] blk_mq_make_request+0xb0/0x890 block/blk-mq.c:1943
>      [<000000003c89773a>] generic_make_request block/blk-core.c:1052 [inline]
>      [<000000003c89773a>] generic_make_request+0xf6/0x4a0  
> block/blk-core.c:994
>      [<00000000a4dcaf78>] submit_bio+0x5a/0x1e0 block/blk-core.c:1163
>      [<000000003e1ce7f8>] __blkdev_direct_IO fs/block_dev.c:459 [inline]
>      [<000000003e1ce7f8>] blkdev_direct_IO+0x2b3/0x6d0 fs/block_dev.c:515
>      [<0000000087ec76a4>] generic_file_direct_write+0xb0/0x1a0  
> mm/filemap.c:3230
>      [<00000000ff259b44>] __generic_file_write_iter+0xec/0x230  
> mm/filemap.c:3413
>      [<00000000223d9b6c>] blkdev_write_iter fs/block_dev.c:2026 [inline]
>      [<00000000223d9b6c>] blkdev_write_iter+0xbe/0x160 fs/block_dev.c:2003
>      [<000000003c4a5c94>] call_write_iter include/linux/fs.h:1870 [inline]
>      [<000000003c4a5c94>] aio_write+0x10b/0x1d0 fs/aio.c:1583
>      [<00000000581f0c84>] __io_submit_one fs/aio.c:1815 [inline]
>      [<00000000581f0c84>] io_submit_one+0x59b/0xe50 fs/aio.c:1862
> 
> BUG: memory leak
> unreferenced object 0xffff8881226da540 (size 192):
>    comm "syz-executor332", pid 6977, jiffies 4294941214 (age 16.750s)
>    hex dump (first 32 bytes):
>      00 00 00 00 00 00 00 00 00 f0 bc 28 81 88 ff ff  ...........(....
>      01 c8 60 00 02 0b 00 00 00 00 00 00 00 00 00 00  ..`.............
>    backtrace:
>      [<00000000b06a638e>] kmemleak_alloc_recursive  
> include/linux/kmemleak.h:43 [inline]
>      [<00000000b06a638e>] slab_post_alloc_hook mm/slab.h:522 [inline]
>      [<00000000b06a638e>] slab_alloc mm/slab.c:3319 [inline]
>      [<00000000b06a638e>] kmem_cache_alloc+0x13f/0x2c0 mm/slab.c:3483
>      [<00000000950a289d>] mempool_alloc_slab+0x1e/0x30 mm/mempool.c:513
>      [<00000000bfcc27e2>] mempool_alloc+0x64/0x1b0 mm/mempool.c:393
>      [<00000000cdf95a4a>] bio_alloc_bioset+0x180/0x2c0 block/bio.c:477
>      [<00000000b239bb68>] bio_clone_fast+0x25/0x90 block/bio.c:609
>      [<000000005d58c2dc>] bio_split+0x4a/0xd0 block/bio.c:1856
>      [<00000000ab943734>] blk_bio_segment_split block/blk-merge.c:250  
> [inline]
>      [<00000000ab943734>] __blk_queue_split+0x355/0x730 block/blk-merge.c:272
>      [<00000000e702c0ac>] blk_mq_make_request+0xb0/0x890 block/blk-mq.c:1943
>      [<000000003c89773a>] generic_make_request block/blk-core.c:1052 [inline]
>      [<000000003c89773a>] generic_make_request+0xf6/0x4a0  
> block/blk-core.c:994
>      [<00000000a4dcaf78>] submit_bio+0x5a/0x1e0 block/blk-core.c:1163
>      [<000000003e1ce7f8>] __blkdev_direct_IO fs/block_dev.c:459 [inline]
>      [<000000003e1ce7f8>] blkdev_direct_IO+0x2b3/0x6d0 fs/block_dev.c:515
>      [<0000000087ec76a4>] generic_file_direct_write+0xb0/0x1a0  
> mm/filemap.c:3230
>      [<00000000ff259b44>] __generic_file_write_iter+0xec/0x230  
> mm/filemap.c:3413
>      [<00000000223d9b6c>] blkdev_write_iter fs/block_dev.c:2026 [inline]
>      [<00000000223d9b6c>] blkdev_write_iter+0xbe/0x160 fs/block_dev.c:2003
>      [<000000003c4a5c94>] call_write_iter include/linux/fs.h:1870 [inline]
>      [<000000003c4a5c94>] aio_write+0x10b/0x1d0 fs/aio.c:1583
>      [<00000000581f0c84>] __io_submit_one fs/aio.c:1815 [inline]
>      [<00000000581f0c84>] io_submit_one+0x59b/0xe50 fs/aio.c:1862
> 
> BUG: memory leak
> unreferenced object 0xffff8881226da6c0 (size 192):
>    comm "syz-executor332", pid 6977, jiffies 4294941214 (age 17.650s)
>    hex dump (first 32 bytes):
>      00 00 00 00 00 00 00 00 00 f0 bc 28 81 88 ff ff  ...........(....
>      01 c8 60 00 02 0b 00 00 00 00 00 00 00 00 00 00  ..`.............
>    backtrace:
>      [<00000000b06a638e>] kmemleak_alloc_recursive  
> include/linux/kmemleak.h:43 [inline]
>      [<00000000b06a638e>] slab_post_alloc_hook mm/slab.h:522 [inline]
>      [<00000000b06a638e>] slab_alloc mm/slab.c:3319 [inline]
>      [<00000000b06a638e>] kmem_cache_alloc+0x13f/0x2c0 mm/slab.c:3483
>      [<00000000950a289d>] mempool_alloc_slab+0x1e/0x30 mm/mempool.c:513
>      [<00000000bfcc27e2>] mempool_alloc+0x64/0x1b0 mm/mempool.c:393
>      [<00000000cdf95a4a>] bio_alloc_bioset+0x180/0x2c0 block/bio.c:477
>      [<00000000b239bb68>] bio_clone_fast+0x25/0x90 block/bio.c:609
>      [<000000005d58c2dc>] bio_split+0x4a/0xd0 block/bio.c:1856
>      [<00000000ab943734>] blk_bio_segment_split block/blk-merge.c:250  
> [inline]
>      [<00000000ab943734>] __blk_queue_split+0x355/0x730 block/blk-merge.c:272
>      [<00000000e702c0ac>] blk_mq_make_request+0xb0/0x890 block/blk-mq.c:1943
>      [<000000003c89773a>] generic_make_request block/blk-core.c:1052 [inline]
>      [<000000003c89773a>] generic_make_request+0xf6/0x4a0  
> block/blk-core.c:994
>      [<00000000a4dcaf78>] submit_bio+0x5a/0x1e0 block/blk-core.c:1163
>      [<000000003e1ce7f8>] __blkdev_direct_IO fs/block_dev.c:459 [inline]
>      [<000000003e1ce7f8>] blkdev_direct_IO+0x2b3/0x6d0 fs/block_dev.c:515
>      [<0000000087ec76a4>] generic_file_direct_write+0xb0/0x1a0  
> mm/filemap.c:3230
>      [<00000000ff259b44>] __generic_file_write_iter+0xec/0x230  
> mm/filemap.c:3413
>      [<00000000223d9b6c>] blkdev_write_iter fs/block_dev.c:2026 [inline]
>      [<00000000223d9b6c>] blkdev_write_iter+0xbe/0x160 fs/block_dev.c:2003
>      [<000000003c4a5c94>] call_write_iter include/linux/fs.h:1870 [inline]
>      [<000000003c4a5c94>] aio_write+0x10b/0x1d0 fs/aio.c:1583
>      [<00000000581f0c84>] __io_submit_one fs/aio.c:1815 [inline]
>      [<00000000581f0c84>] io_submit_one+0x59b/0xe50 fs/aio.c:1862
> 
> BUG: memory leak
> unreferenced object 0xffff8881226da600 (size 192):
>    comm "syz-executor332", pid 6977, jiffies 4294941214 (age 17.650s)
>    hex dump (first 32 bytes):
>      00 00 00 00 00 00 00 00 00 f0 bc 28 81 88 ff ff  ...........(....
>      01 c8 60 00 02 0b 00 00 00 00 00 00 00 00 00 00  ..`.............
>    backtrace:
>      [<00000000b06a638e>] kmemleak_alloc_recursive  
> include/linux/kmemleak.h:43 [inline]
>      [<00000000b06a638e>] slab_post_alloc_hook mm/slab.h:522 [inline]
>      [<00000000b06a638e>] slab_alloc mm/slab.c:3319 [inline]
>      [<00000000b06a638e>] kmem_cache_alloc+0x13f/0x2c0 mm/slab.c:3483
>      [<00000000950a289d>] mempool_alloc_slab+0x1e/0x30 mm/mempool.c:513
>      [<00000000bfcc27e2>] mempool_alloc+0x64/0x1b0 mm/mempool.c:393
>      [<00000000cdf95a4a>] bio_alloc_bioset+0x180/0x2c0 block/bio.c:477
>      [<00000000b239bb68>] bio_clone_fast+0x25/0x90 block/bio.c:609
>      [<000000005d58c2dc>] bio_split+0x4a/0xd0 block/bio.c:1856
>      [<00000000ab943734>] blk_bio_segment_split block/blk-merge.c:250  
> [inline]
>      [<00000000ab943734>] __blk_queue_split+0x355/0x730 block/blk-merge.c:272
>      [<00000000e702c0ac>] blk_mq_make_request+0xb0/0x890 block/blk-mq.c:1943
>      [<000000003c89773a>] generic_make_request block/blk-core.c:1052 [inline]
>      [<000000003c89773a>] generic_make_request+0xf6/0x4a0  
> block/blk-core.c:994
>      [<00000000a4dcaf78>] submit_bio+0x5a/0x1e0 block/blk-core.c:1163
>      [<000000003e1ce7f8>] __blkdev_direct_IO fs/block_dev.c:459 [inline]
>      [<000000003e1ce7f8>] blkdev_direct_IO+0x2b3/0x6d0 fs/block_dev.c:515
>      [<0000000087ec76a4>] generic_file_direct_write+0xb0/0x1a0  
> mm/filemap.c:3230
>      [<00000000ff259b44>] __generic_file_write_iter+0xec/0x230  
> mm/filemap.c:3413
>      [<00000000223d9b6c>] blkdev_write_iter fs/block_dev.c:2026 [inline]
>      [<00000000223d9b6c>] blkdev_write_iter+0xbe/0x160 fs/block_dev.c:2003
>      [<000000003c4a5c94>] call_write_iter include/linux/fs.h:1870 [inline]
>      [<000000003c4a5c94>] aio_write+0x10b/0x1d0 fs/aio.c:1583
>      [<00000000581f0c84>] __io_submit_one fs/aio.c:1815 [inline]
>      [<00000000581f0c84>] io_submit_one+0x59b/0xe50 fs/aio.c:1862
> 
> BUG: memory leak
> unreferenced object 0xffff8881226da540 (size 192):
>    comm "syz-executor332", pid 6977, jiffies 4294941214 (age 17.650s)
>    hex dump (first 32 bytes):
>      00 00 00 00 00 00 00 00 00 f0 bc 28 81 88 ff ff  ...........(....
>      01 c8 60 00 02 0b 00 00 00 00 00 00 00 00 00 00  ..`.............
>    backtrace:
>      [<00000000b06a638e>] kmemleak_alloc_recursive  
> include/linux/kmemleak.h:43 [inline]
>      [<00000000b06a638e>] slab_post_alloc_hook mm/slab.h:522 [inline]
>      [<00000000b06a638e>] slab_alloc mm/slab.c:3319 [inline]
>      [<00000000b06a638e>] kmem_cache_alloc+0x13f/0x2c0 mm/slab.c:3483
>      [<00000000950a289d>] mempool_alloc_slab+0x1e/0x30 mm/mempool.c:513
>      [<00000000bfcc27e2>] mempool_alloc+0x64/0x1b0 mm/mempool.c:393
>      [<00000000cdf95a4a>] bio_alloc_bioset+0x180/0x2c0 block/bio.c:477
>      [<00000000b239bb68>] bio_clone_fast+0x25/0x90 block/bio.c:609
>      [<000000005d58c2dc>] bio_split+0x4a/0xd0 block/bio.c:1856
>      [<00000000ab943734>] blk_bio_segment_split block/blk-merge.c:250  
> [inline]
>      [<00000000ab943734>] __blk_queue_split+0x355/0x730 block/blk-merge.c:272
>      [<00000000e702c0ac>] blk_mq_make_request+0xb0/0x890 block/blk-mq.c:1943
>      [<000000003c89773a>] generic_make_request block/blk-core.c:1052 [inline]
>      [<000000003c89773a>] generic_make_request+0xf6/0x4a0  
> block/blk-core.c:994
>      [<00000000a4dcaf78>] submit_bio+0x5a/0x1e0 block/blk-core.c:1163
>      [<000000003e1ce7f8>] __blkdev_direct_IO fs/block_dev.c:459 [inline]
>      [<000000003e1ce7f8>] blkdev_direct_IO+0x2b3/0x6d0 fs/block_dev.c:515
>      [<0000000087ec76a4>] generic_file_direct_write+0xb0/0x1a0  
> mm/filemap.c:3230
>      [<00000000ff259b44>] __generic_file_write_iter+0xec/0x230  
> mm/filemap.c:3413
>      [<00000000223d9b6c>] blkdev_write_iter fs/block_dev.c:2026 [inline]
>      [<00000000223d9b6c>] blkdev_write_iter+0xbe/0x160 fs/block_dev.c:2003
>      [<000000003c4a5c94>] call_write_iter include/linux/fs.h:1870 [inline]
>      [<000000003c4a5c94>] aio_write+0x10b/0x1d0 fs/aio.c:1583
>      [<00000000581f0c84>] __io_submit_one fs/aio.c:1815 [inline]
>      [<00000000581f0c84>] io_submit_one+0x59b/0xe50 fs/aio.c:1862
> 
> BUG: memory leak
> unreferenced object 0xffff8881226da6c0 (size 192):
>    comm "syz-executor332", pid 6977, jiffies 4294941214 (age 18.550s)
>    hex dump (first 32 bytes):
>      00 00 00 00 00 00 00 00 00 f0 bc 28 81 88 ff ff  ...........(....
>      01 c8 60 00 02 0b 00 00 00 00 00 00 00 00 00 00  ..`.............
>    backtrace:
>      [<00000000b06a638e>] kmemleak_alloc_recursive  
> include/linux/kmemleak.h:43 [inline]
>      [<00000000b06a638e>] slab_post_alloc_hook mm/slab.h:522 [inline]
>      [<00000000b06a638e>] slab_alloc mm/slab.c:3319 [inline]
>      [<00000000b06a638e>] kmem_cache_alloc+0x13f/0x2c0 mm/slab.c:3483
>      [<00000000950a289d>] mempool_alloc_slab+0x1e/0x30 mm/mempool.c:513
>      [<00000000bfcc27e2>] mempool_alloc+0x64/0x1b0 mm/mempool.c:393
>      [<00000000cdf95a4a>] bio_alloc_bioset+0x180/0x2c0 block/bio.c:477
>      [<00000000b239bb68>] bio_clone_fast+0x25/0x90 block/bio.c:609
>      [<000000005d58c2dc>] bio_split+0x4a/0xd0 block/bio.c:1856
>      [<00000000ab943734>] blk_bio_segment_split block/blk-merge.c:250  
> [inline]
>      [<00000000ab943734>] __blk_queue_split+0x355/0x730 block/blk-merge.c:272
>      [<00000000e702c0ac>] blk_mq_make_request+0xb0/0x890 block/blk-mq.c:1943
>      [<000000003c89773a>] generic_make_request block/blk-core.c:1052 [inline]
>      [<000000003c89773a>] generic_make_request+0xf6/0x4a0  
> block/blk-core.c:994
>      [<00000000a4dcaf78>] submit_bio+0x5a/0x1e0 block/blk-core.c:1163
>      [<000000003e1ce7f8>] __blkdev_direct_IO fs/block_dev.c:459 [inline]
>      [<000000003e1ce7f8>] blkdev_direct_IO+0x2b3/0x6d0 fs/block_dev.c:515
>      [<0000000087ec76a4>] generic_file_direct_write+0xb0/0x1a0  
> mm/filemap.c:3230
>      [<00000000ff259b44>] __generic_file_write_iter+0xec/0x230  
> mm/filemap.c:3413
>      [<00000000223d9b6c>] blkdev_write_iter fs/block_dev.c:2026 [inline]
>      [<00000000223d9b6c>] blkdev_write_iter+0xbe/0x160 fs/block_dev.c:2003
>      [<000000003c4a5c94>] call_write_iter include/linux/fs.h:1870 [inline]
>      [<000000003c4a5c94>] aio_write+0x10b/0x1d0 fs/aio.c:1583
>      [<00000000581f0c84>] __io_submit_one fs/aio.c:1815 [inline]
>      [<00000000581f0c84>] io_submit_one+0x59b/0xe50 fs/aio.c:1862
> 
> BUG: memory leak
> unreferenced object 0xffff8881226da600 (size 192):
>    comm "syz-executor332", pid 6977, jiffies 4294941214 (age 18.550s)
>    hex dump (first 32 bytes):
>      00 00 00 00 00 00 00 00 00 f0 bc 28 81 88 ff ff  ...........(....
>      01 c8 60 00 02 0b 00 00 00 00 00 00 00 00 00 00  ..`.............
>    backtrace:
>      [<00000000b06a638e>] kmemleak_alloc_recursive  
> include/linux/kmemleak.h:43 [inline]
>      [<00000000b06a638e>] slab_post_alloc_hook mm/slab.h:522 [inline]
>      [<00000000b06a638e>] slab_alloc mm/slab.c:3319 [inline]
>      [<00000000b06a638e>] kmem_cache_alloc+0x13f/0x2c0 mm/slab.c:3483
>      [<00000000950a289d>] mempool_alloc_slab+0x1e/0x30 mm/mempool.c:513
>      [<00000000bfcc27e2>] mempool_alloc+0x64/0x1b0 mm/mempool.c:393
>      [<00000000cdf95a4a>] bio_alloc_bioset+0x180/0x2c0 block/bio.c:477
>      [<00000000b239bb68>] bio_clone_fast+0x25/0x90 block/bio.c:609
>      [<000000005d58c2dc>] bio_split+0x4a/0xd0 block/bio.c:1856
>      [<00000000ab943734>] blk_bio_segment_split block/blk-merge.c:250  
> [inline]
>      [<00000000ab943734>] __blk_queue_split+0x355/0x730 block/blk-merge.c:272
>      [<00000000e702c0ac>] blk_mq_make_request+0xb0/0x890 block/blk-mq.c:1943
>      [<000000003c89773a>] generic_make_request block/blk-core.c:1052 [inline]
>      [<000000003c89773a>] generic_make_request+0xf6/0x4a0  
> block/blk-core.c:994
>      [<00000000a4dcaf78>] submit_bio+0x5a/0x1e0 block/blk-core.c:1163
>      [<000000003e1ce7f8>] __blkdev_direct_IO fs/block_dev.c:459 [inline]
>      [<000000003e1ce7f8>] blkdev_direct_IO+0x2b3/0x6d0 fs/block_dev.c:515
>      [<0000000087ec76a4>] generic_file_direct_write+0xb0/0x1a0  
> mm/filemap.c:3230
>      [<00000000ff259b44>] __generic_file_write_iter+0xec/0x230  
> mm/filemap.c:3413
>      [<00000000223d9b6c>] blkdev_write_iter fs/block_dev.c:2026 [inline]
>      [<00000000223d9b6c>] blkdev_write_iter+0xbe/0x160 fs/block_dev.c:2003
>      [<000000003c4a5c94>] call_write_iter include/linux/fs.h:1870 [inline]
>      [<000000003c4a5c94>] aio_write+0x10b/0x1d0 fs/aio.c:1583
>      [<00000000581f0c84>] __io_submit_one fs/aio.c:1815 [inline]
>      [<00000000581f0c84>] io_submit_one+0x59b/0xe50 fs/aio.c:1862
> 
> BUG: memory leak
> unreferenced object 0xffff8881226da540 (size 192):
>    comm "syz-executor332", pid 6977, jiffies 4294941214 (age 18.550s)
>    hex dump (first 32 bytes):
>      00 00 00 00 00 00 00 00 00 f0 bc 28 81 88 ff ff  ...........(....
>      01 c8 60 00 02 0b 00 00 00 00 00 00 00 00 00 00  ..`.............
>    backtrace:
>      [<00000000b06a638e>] kmemleak_alloc_recursive  
> include/linux/kmemleak.h:43 [inline]
>      [<00000000b06a638e>] slab_post_alloc_hook mm/slab.h:522 [inline]
>      [<00000000b06a638e>] slab_alloc mm/slab.c:3319 [inline]
>      [<00000000b06a638e>] kmem_cache_alloc+0x13f/0x2c0 mm/slab.c:3483
>      [<00000000950a289d>] mempool_alloc_slab+0x1e/0x30 mm/mempool.c:513
>      [<00000000bfcc27e2>] mempool_alloc+0x64/0x1b0 mm/mempool.c:393
>      [<00000000cdf95a4a>] bio_alloc_bioset+0x180/0x2c0 block/bio.c:477
>      [<00000000b239bb68>] bio_clone_fast+0x25/0x90 block/bio.c:609
>      [<000000005d58c2dc>] bio_split+0x4a/0xd0 block/bio.c:1856
>      [<00000000ab943734>] blk_bio_segment_split block/blk-merge.c:250  
> [inline]
>      [<00000000ab943734>] __blk_queue_split+0x355/0x730 block/blk-merge.c:272
>      [<00000000e702c0ac>] blk_mq_make_request+0xb0/0x890 block/blk-mq.c:1943
>      [<000000003c89773a>] generic_make_request block/blk-core.c:1052 [inline]
>      [<000000003c89773a>] generic_make_request+0xf6/0x4a0  
> block/blk-core.c:994
>      [<00000000a4dcaf78>] submit_bio+0x5a/0x1e0 block/blk-core.c:1163
>      [<000000003e1ce7f8>] __blkdev_direct_IO fs/block_dev.c:459 [inline]
>      [<000000003e1ce7f8>] blkdev_direct_IO+0x2b3/0x6d0 fs/block_dev.c:515
>      [<0000000087ec76a4>] generic_file_direct_write+0xb0/0x1a0  
> mm/filemap.c:3230
>      [<00000000ff259b44>] __generic_file_write_iter+0xec/0x230  
> mm/filemap.c:3413
>      [<00000000223d9b6c>] blkdev_write_iter fs/block_dev.c:2026 [inline]
>      [<00000000223d9b6c>] blkdev_write_iter+0xbe/0x160 fs/block_dev.c:2003
>      [<000000003c4a5c94>] call_write_iter include/linux/fs.h:1870 [inline]
>      [<000000003c4a5c94>] aio_write+0x10b/0x1d0 fs/aio.c:1583
>      [<00000000581f0c84>] __io_submit_one fs/aio.c:1815 [inline]
>      [<00000000581f0c84>] io_submit_one+0x59b/0xe50 fs/aio.c:1862
> 
> BUG: memory leak
> unreferenced object 0xffff8881226da6c0 (size 192):
>    comm "syz-executor332", pid 6977, jiffies 4294941214 (age 19.450s)
>    hex dump (first 32 bytes):
>      00 00 00 00 00 00 00 00 00 f0 bc 28 81 88 ff ff  ...........(....
>      01 c8 60 00 02 0b 00 00 00 00 00 00 00 00 00 00  ..`.............
>    backtrace:
>      [<00000000b06a638e>] kmemleak_alloc_recursive  
> include/linux/kmemleak.h:43 [inline]
>      [<00000000b06a638e>] slab_post_alloc_hook mm/slab.h:522 [inline]
>      [<00000000b06a638e>] slab_alloc mm/slab.c:3319 [inline]
>      [<00000000b06a638e>] kmem_cache_alloc+0x13f/0x2c0 mm/slab.c:3483
>      [<00000000950a289d>] mempool_alloc_slab+0x1e/0x30 mm/mempool.c:513
>      [<00000000bfcc27e2>] mempool_alloc+0x64/0x1b0 mm/mempool.c:393
>      [<00000000cdf95a4a>] bio_alloc_bioset+0x180/0x2c0 block/bio.c:477
>      [<00000000b239bb68>] bio_clone_fast+0x25/0x90 block/bio.c:609
>      [<000000005d58c2dc>] bio_split+0x4a/0xd0 block/bio.c:1856
>      [<00000000ab943734>] blk_bio_segment_split block/blk-merge.c:250  
> [inline]
>      [<00000000ab943734>] __blk_queue_split+0x355/0x730 block/blk-merge.c:272
>      [<00000000e702c0ac>] blk_mq_make_request+0xb0/0x890 block/blk-mq.c:1943
>      [<000000003c89773a>] generic_make_request block/blk-core.c:1052 [inline]
>      [<000000003c89773a>] generic_make_request+0xf6/0x4a0  
> block/blk-core.c:994
>      [<00000000a4dcaf78>] submit_bio+0x5a/0x1e0 block/blk-core.c:1163
>      [<000000003e1ce7f8>] __blkdev_direct_IO fs/block_dev.c:459 [inline]
>      [<000000003e1ce7f8>] blkdev_direct_IO+0x2b3/0x6d0 fs/block_dev.c:515
>      [<0000000087ec76a4>] generic_file_direct_write+0xb0/0x1a0  
> mm/filemap.c:3230
>      [<00000000ff259b44>] __generic_file_write_iter+0xec/0x230  
> mm/filemap.c:3413
>      [<00000000223d9b6c>] blkdev_write_iter fs/block_dev.c:2026 [inline]
>      [<00000000223d9b6c>] blkdev_write_iter+0xbe/0x160 fs/block_dev.c:2003
>      [<000000003c4a5c94>] call_write_iter include/linux/fs.h:1870 [inline]
>      [<000000003c4a5c94>] aio_write+0x10b/0x1d0 fs/aio.c:1583
>      [<00000000581f0c84>] __io_submit_one fs/aio.c:1815 [inline]
>      [<00000000581f0c84>] io_submit_one+0x59b/0xe50 fs/aio.c:1862
> 
> BUG: memory leak
> unreferenced object 0xffff8881226da600 (size 192):
>    comm "syz-executor332", pid 6977, jiffies 4294941214 (age 19.450s)
>    hex dump (first 32 bytes):
>      00 00 00 00 00 00 00 00 00 f0 bc 28 81 88 ff ff  ...........(....
>      01 c8 60 00 02 0b 00 00 00 00 00 00 00 00 00 00  ..`.............
>    backtrace:
>      [<00000000b06a638e>] kmemleak_alloc_recursive  
> include/linux/kmemleak.h:43 [inline]
>      [<00000000b06a638e>] slab_post_alloc_hook mm/slab.h:522 [inline]
>      [<00000000b06a638e>] slab_alloc mm/slab.c:3319 [inline]
>      [<00000000b06a638e>] kmem_cache_alloc+0x13f/0x2c0 mm/slab.c:3483
>      [<00000000950a289d>] mempool_alloc_slab+0x1e/0x30 mm/mempool.c:513
>      [<00000000bfcc27e2>] mempool_alloc+0x64/0x1b0 mm/mempool.c:393
>      [<00000000cdf95a4a>] bio_alloc_bioset+0x180/0x2c0 block/bio.c:477
>      [<00000000b239bb68>] bio_clone_fast+0x25/0x90 block/bio.c:609
>      [<000000005d58c2dc>] bio_split+0x4a/0xd0 block/bio.c:1856
>      [<00000000ab943734>] blk_bio_segment_split block/blk-merge.c:250  
> [inline]
>      [<00000000ab943734>] __blk_queue_split+0x355/0x730 block/blk-merge.c:272
>      [<00000000e702c0ac>] blk_mq_make_request+0xb0/0x890 block/blk-mq.c:1943
>      [<000000003c89773a>] generic_make_request block/blk-core.c:1052 [inline]
>      [<000000003c89773a>] generic_make_request+0xf6/0x4a0  
> block/blk-core.c:994
>      [<00000000a4dcaf78>] submit_bio+0x5a/0x1e0 block/blk-core.c:1163
>      [<000000003e1ce7f8>] __blkdev_direct_IO fs/block_dev.c:459 [inline]
>      [<000000003e1ce7f8>] blkdev_direct_IO+0x2b3/0x6d0 fs/block_dev.c:515
>      [<0000000087ec76a4>] generic_file_direct_write+0xb0/0x1a0  
> mm/filemap.c:3230
>      [<00000000ff259b44>] __generic_file_write_iter+0xec/0x230  
> mm/filemap.c:3413
>      [<00000000223d9b6c>] blkdev_write_iter fs/block_dev.c:2026 [inline]
>      [<00000000223d9b6c>] blkdev_write_iter+0xbe/0x160 fs/block_dev.c:2003
>      [<000000003c4a5c94>] call_write_iter include/linux/fs.h:1870 [inline]
>      [<000000003c4a5c94>] aio_write+0x10b/0x1d0 fs/aio.c:1583
>      [<00000000581f0c84>] __io_submit_one fs/aio.c:1815 [inline]
>      [<00000000581f0c84>] io_submit_one+0x59b/0xe50 fs/aio.c:1862
> 
> BUG: memory leak
> unreferenced object 0xffff8881226da540 (size 192):
>    comm "syz-executor332", pid 6977, jiffies 4294941214 (age 19.450s)
>    hex dump (first 32 bytes):
>      00 00 00 00 00 00 00 00 00 f0 bc 28 81 88 ff ff  ...........(....
>      01 c8 60 00 02 0b 00 00 00 00 00 00 00 00 00 00  ..`.............
>    backtrace:
>      [<00000000b06a638e>] kmemleak_alloc_recursive  
> include/linux/kmemleak.h:43 [inline]
>      [<00000000b06a638e>] slab_post_alloc_hook mm/slab.h:522 [inline]
>      [<00000000b06a638e>] slab_alloc mm/slab.c:3319 [inline]
>      [<00000000b06a638e>] kmem_cache_alloc+0x13f/0x2c0 mm/slab.c:3483
>      [<00000000950a289d>] mempool_alloc_slab+0x1e/0x30 mm/mempool.c:513
>      [<00000000bfcc27e2>] mempool_alloc+0x64/0x1b0 mm/mempool.c:393
>      [<00000000cdf95a4a>] bio_alloc_bioset+0x180/0x2c0 block/bio.c:477
>      [<00000000b239bb68>] bio_clone_fast+0x25/0x90 block/bio.c:609
>      [<000000005d58c2dc>] bio_split+0x4a/0xd0 block/bio.c:1856
>      [<00000000ab943734>] blk_bio_segment_split block/blk-merge.c:250  
> [inline]
>      [<00000000ab943734>] __blk_queue_split+0x355/0x730 block/blk-merge.c:272
>      [<00000000e702c0ac>] blk_mq_make_request+0xb0/0x890 block/blk-mq.c:1943
>      [<000000003c89773a>] generic_make_request block/blk-core.c:1052 [inline]
>      [<000000003c89773a>] generic_make_request+0xf6/0x4a0  
> block/blk-core.c:994
>      [<00000000a4dcaf78>] submit_bio+0x5a/0x1e0 block/blk-core.c:1163
>      [<000000003e1ce7f8>] __blkdev_direct_IO fs/block_dev.c:459 [inline]
>      [<000000003e1ce7f8>] blkdev_direct_IO+0x2b3/0x6d0 fs/block_dev.c:515
>      [<0000000087ec76a4>] generic_file_direct_write+0xb0/0x1a0  
> mm/filemap.c:3230
>      [<00000000ff259b44>] __generic_file_write_iter+0xec/0x230  
> mm/filemap.c:3413
>      [<00000000223d9b6c>] blkdev_write_iter fs/block_dev.c:2026 [inline]
>      [<00000000223d9b6c>] blkdev_write_iter+0xbe/0x160 fs/block_dev.c:2003
>      [<000000003c4a5c94>] call_write_iter include/linux/fs.h:1870 [inline]
>      [<000000003c4a5c94>] aio_write+0x10b/0x1d0 fs/aio.c:1583
>      [<00000000581f0c84>] __io_submit_one fs/aio.c:1815 [inline]
>      [<00000000581f0c84>] io_submit_one+0x59b/0xe50 fs/aio.c:1862
> 
> BUG: memory leak
> unreferenced object 0xffff8881226da6c0 (size 192):
>    comm "syz-executor332", pid 6977, jiffies 4294941214 (age 19.510s)
>    hex dump (first 32 bytes):
>      00 00 00 00 00 00 00 00 00 f0 bc 28 81 88 ff ff  ...........(....
>      01 c8 60 00 02 0b 00 00 00 00 00 00 00 00 00 00  ..`.............
>    backtrace:
>      [<00000000b06a638e>] kmemleak_alloc_recursive  
> include/linux/kmemleak.h:43 [inline]
>      [<00000000b06a638e>] slab_post_alloc_hook mm/slab.h:522 [inline]
>      [<00000000b06a638e>] slab_alloc mm/slab.c:3319 [inline]
>      [<00000000b06a638e>] kmem_cache_alloc+0x13f/0x2c0 mm/slab.c:3483
>      [<00000000950a289d>] mempool_alloc_slab+0x1e/0x30 mm/mempool.c:513
>      [<00000000bfcc27e2>] mempool_alloc+0x64/0x1b0 mm/mempool.c:393
>      [<00000000cdf95a4a>] bio_alloc_bioset+0x180/0x2c0 block/bio.c:477
>      [<00000000b239bb68>] bio_clone_fast+0x25/0x90 block/bio.c:609
>      [<000000005d58c2dc>] bio_split+0x4a/0xd0 block/bio.c:1856
>      [<00000000ab943734>] blk_bio_segment_split block/blk-merge.c:250  
> [inline]
>      [<00000000ab943734>] __blk_queue_split+0x355/0x730 block/blk-merge.c:272
>      [<00000000e702c0ac>] blk_mq_make_request+0xb0/0x890 block/blk-mq.c:1943
>      [<000000003c89773a>] generic_make_request block/blk-core.c:1052 [inline]
>      [<000000003c89773a>] generic_make_request+0xf6/0x4a0  
> block/blk-core.c:994
>      [<00000000a4dcaf78>] submit_bio+0x5a/0x1e0 block/blk-core.c:1163
>      [<000000003e1ce7f8>] __blkdev_direct_IO fs/block_dev.c:459 [inline]
>      [<000000003e1ce7f8>] blkdev_direct_IO+0x2b3/0x6d0 fs/block_dev.c:515
>      [<0000000087ec76a4>] generic_file_direct_write+0xb0/0x1a0  
> mm/filemap.c:3230
>      [<00000000ff259b44>] __generic_file_write_iter+0xec/0x230  
> mm/filemap.c:3413
>      [<00000000223d9b6c>] blkdev_write_iter fs/block_dev.c:2026 [inline]
>      [<00000000223d9b6c>] blkdev_write_iter+0xbe/0x160 fs/block_dev.c:2003
>      [<000000003c4a5c94>] call_write_iter include/linux/fs.h:1870 [inline]
>      [<000000003c4a5c94>] aio_write+0x10b/0x1d0 fs/aio.c:1583
>      [<00000000581f0c84>] __io_submit_one fs/aio.c:1815 [inline]
>      [<00000000581f0c84>] io_submit_one+0x59b/0xe50 fs/aio.c:1862
> 
> BUG: memory leak
> unreferenced object 0xffff8881226da600 (size 192):
>    comm "syz-executor332", pid 6977, jiffies 4294941214 (age 19.510s)
>    hex dump (first 32 bytes):
>      00 00 00 00 00 00 00 00 00 f0 bc 28 81 88 ff ff  ...........(....
>      01 c8 60 00 02 0b 00 00 00 00 00 00 00 00 00 00  ..`.............
>    backtrace:
>      [<00000000b06a638e>] kmemleak_alloc_recursive  
> include/linux/kmemleak.h:43 [inline]
>      [<00000000b06a638e>] slab_post_alloc_hook mm/slab.h:522 [inline]
>      [<00000000b06a638e>] slab_alloc mm/slab.c:3319 [inline]
>      [<00000000b06a638e>] kmem_cache_alloc+0x13f/0x2c0 mm/slab.c:3483
>      [<00000000950a289d>] mempool_alloc_slab+0x1e/0x30 mm/mempool.c:513
>      [<00000000bfcc27e2>] mempool_alloc+0x64/0x1b0 mm/mempool.c:393
>      [<00000000cdf95a4a>] bio_alloc_bioset+0x180/0x2c0 block/bio.c:477
>      [<00000000b239bb68>] bio_clone_fast+0x25/0x90 block/bio.c:609
>      [<000000005d58c2dc>] bio_split+0x4a/0xd0 block/bio.c:1856
>      [<00000000ab943734>] blk_bio_segment_split block/blk-merge.c:250  
> [inline]
>      [<00000000ab943734>] __blk_queue_split+0x355/0x730 block/blk-merge.c:272
>      [<00000000e702c0ac>] blk_mq_make_request+0xb0/0x890 block/blk-mq.c:1943
>      [<000000003c89773a>] generic_make_request block/blk-core.c:1052 [inline]
>      [<000000003c89773a>] generic_make_request+0xf6/0x4a0  
> block/blk-core.c:994
>      [<00000000a4dcaf78>] submit_bio+0x5a/0x1e0 block/blk-core.c:1163
>      [<000000003e1ce7f8>] __blkdev_direct_IO fs/block_dev.c:459 [inline]
>      [<000000003e1ce7f8>] blkdev_direct_IO+0x2b3/0x6d0 fs/block_dev.c:515
>      [<0000000087ec76a4>] generic_file_direct_write+0xb0/0x1a0  
> mm/filemap.c:3230
>      [<00000000ff259b44>] __generic_file_write_iter+0xec/0x230  
> mm/filemap.c:3413
>      [<00000000223d9b6c>] blkdev_write_iter fs/block_dev.c:2026 [inline]
>      [<00000000223d9b6c>] blkdev_write_iter+0xbe/0x160 fs/block_dev.c:2003
>      [<000000003c4a5c94>] call_write_iter include/linux/fs.h:1870 [inline]
>      [<000000003c4a5c94>] aio_write+0x10b/0x1d0 fs/aio.c:1583
>      [<00000000581f0c84>] __io_submit_one fs/aio.c:1815 [inline]
>      [<00000000581f0c84>] io_submit_one+0x59b/0xe50 fs/aio.c:1862
> 
> BUG: memory leak
> unreferenced object 0xffff8881226da540 (size 192):
>    comm "syz-executor332", pid 6977, jiffies 4294941214 (age 19.510s)
>    hex dump (first 32 bytes):
>      00 00 00 00 00 00 00 00 00 f0 bc 28 81 88 ff ff  ...........(....
>      01 c8 60 00 02 0b 00 00 00 00 00 00 00 00 00 00  ..`.............
>    backtrace:
>      [<00000000b06a638e>] kmemleak_alloc_recursive  
> include/linux/kmemleak.h:43 [inline]
>      [<00000000b06a638e>] slab_post_alloc_hook mm/slab.h:522 [inline]
>      [<00000000b06a638e>] slab_alloc mm/slab.c:3319 [inline]
>      [<00000000b06a638e>] kmem_cache_alloc+0x13f/0x2c0 mm/slab.c:3483
>      [<00000000950a289d>] mempool_alloc_slab+0x1e/0x30 mm/mempool.c:513
>      [<00000000bfcc27e2>] mempool_alloc+0x64/0x1b0 mm/mempool.c:393
>      [<00000000cdf95a4a>] bio_alloc_bioset+0x180/0x2c0 block/bio.c:477
>      [<00000000b239bb68>] bio_clone_fast+0x25/0x90 block/bio.c:609
>      [<000000005d58c2dc>] bio_split+0x4a/0xd0 block/bio.c:1856
>      [<00000000ab943734>] blk_bio_segment_split block/blk-merge.c:250  
> [inline]
>      [<00000000ab943734>] __blk_queue_split+0x355/0x730 block/blk-merge.c:272
>      [<00000000e702c0ac>] blk_mq_make_request+0xb0/0x890 block/blk-mq.c:1943
>      [<000000003c89773a>] generic_make_request block/blk-core.c:1052 [inline]
>      [<000000003c89773a>] generic_make_request+0xf6/0x4a0  
> block/blk-core.c:994
>      [<00000000a4dcaf78>] submit_bio+0x5a/0x1e0 block/blk-core.c:1163
>      [<000000003e1ce7f8>] __blkdev_direct_IO fs/block_dev.c:459 [inline]
>      [<000000003e1ce7f8>] blkdev_direct_IO+0x2b3/0x6d0 fs/block_dev.c:515
>      [<0000000087ec76a4>] generic_file_direct_write+0xb0/0x1a0  
> mm/filemap.c:3230
>      [<00000000ff259b44>] __generic_file_write_iter+0xec/0x230  
> mm/filemap.c:3413
>      [<00000000223d9b6c>] blkdev_write_iter fs/block_dev.c:2026 [inline]
>      [<00000000223d9b6c>] blkdev_write_iter+0xbe/0x160 fs/block_dev.c:2003
>      [<000000003c4a5c94>] call_write_iter include/linux/fs.h:1870 [inline]
>      [<000000003c4a5c94>] aio_write+0x10b/0x1d0 fs/aio.c:1583
>      [<00000000581f0c84>] __io_submit_one fs/aio.c:1815 [inline]
>      [<00000000581f0c84>] io_submit_one+0x59b/0xe50 fs/aio.c:1862
> 
> BUG: memory leak
> unreferenced object 0xffff8881226da6c0 (size 192):
>    comm "syz-executor332", pid 6977, jiffies 4294941214 (age 19.560s)
>    hex dump (first 32 bytes):
>      00 00 00 00 00 00 00 00 00 f0 bc 28 81 88 ff ff  ...........(....
>      01 c8 60 00 02 0b 00 00 00 00 00 00 00 00 00 00  ..`.............
>    backtrace:
>      [<00000000b06a638e>] kmemleak_alloc_recursive  
> include/linux/kmemleak.h:43 [inline]
>      [<00000000b06a638e>] slab_post_alloc_hook mm/slab.h:522 [inline]
>      [<00000000b06a638e>] slab_alloc mm/slab.c:3319 [inline]
>      [<00000000b06a638e>] kmem_cache_alloc+0x13f/0x2c0 mm/slab.c:3483
>      [<00000000950a289d>] mempool_alloc_slab+0x1e/0x30 mm/mempool.c:513
>      [<00000000bfcc27e2>] mempool_alloc+0x64/0x1b0 mm/mempool.c:393
>      [<00000000cdf95a4a>] bio_alloc_bioset+0x180/0x2c0 block/bio.c:477
>      [<00000000b239bb68>] bio_clone_fast+0x25/0x90 block/bio.c:609
>      [<000000005d58c2dc>] bio_split+0x4a/0xd0 block/bio.c:1856
>      [<00000000ab943734>] blk_bio_segment_split block/blk-merge.c:250  
> [inline]
>      [<00000000ab943734>] __blk_queue_split+0x355/0x730 block/blk-merge.c:272
>      [<00000000e702c0ac>] blk_mq_make_request+0xb0/0x890 block/blk-mq.c:1943
>      [<000000003c89773a>] generic_make_request block/blk-core.c:1052 [inline]
>      [<000000003c89773a>] generic_make_request+0xf6/0x4a0  
> block/blk-core.c:994
>      [<00000000a4dcaf78>] submit_bio+0x5a/0x1e0 block/blk-core.c:1163
>      [<000000003e1ce7f8>] __blkdev_direct_IO fs/block_dev.c:459 [inline]
>      [<000000003e1ce7f8>] blkdev_direct_IO+0x2b3/0x6d0 fs/block_dev.c:515
>      [<0000000087ec76a4>] generic_file_direct_write+0xb0/0x1a0  
> mm/filemap.c:3230
>      [<00000000ff259b44>] __generic_file_write_iter+0xec/0x230  
> mm/filemap.c:3413
>      [<00000000223d9b6c>] blkdev_write_iter fs/block_dev.c:2026 [inline]
>      [<00000000223d9b6c>] blkdev_write_iter+0xbe/0x160 fs/block_dev.c:2003
>      [<000000003c4a5c94>] call_write_iter include/linux/fs.h:1870 [inline]
>      [<000000003c4a5c94>] aio_write+0x10b/0x1d0 fs/aio.c:1583
>      [<00000000581f0c84>] __io_submit_one fs/aio.c:1815 [inline]
>      [<00000000581f0c84>] io_submit_one+0x59b/0xe50 fs/aio.c:1862
> 
> BUG: memory leak
> unreferenced object 0xffff8881226da600 (size 192):
>    comm "syz-executor332", pid 6977, jiffies 4294941214 (age 19.560s)
>    hex dump (first 32 bytes):
>      00 00 00 00 00 00 00 00 00 f0 bc 28 81 88 ff ff  ...........(....
>      01 c8 60 00 02 0b 00 00 00 00 00 00 00 00 00 00  ..`.............
>    backtrace:
>      [<00000000b06a638e>] kmemleak_alloc_recursive  
> include/linux/kmemleak.h:43 [inline]
>      [<00000000b06a638e>] slab_post_alloc_hook mm/slab.h:522 [inline]
>      [<00000000b06a638e>] slab_alloc mm/slab.c:3319 [inline]
>      [<00000000b06a638e>] kmem_cache_alloc+0x13f/0x2c0 mm/slab.c:3483
>      [<00000000950a289d>] mempool_alloc_slab+0x1e/0x30 mm/mempool.c:513
>      [<00000000bfcc27e2>] mempool_alloc+0x64/0x1b0 mm/mempool.c:393
>      [<00000000cdf95a4a>] bio_alloc_bioset+0x180/0x2c0 block/bio.c:477
>      [<00000000b239bb68>] bio_clone_fast+0x25/0x90 block/bio.c:609
>      [<000000005d58c2dc>] bio_split+0x4a/0xd0 block/bio.c:1856
>      [<00000000ab943734>] blk_bio_segment_split block/blk-merge.c:250  
> [inline]
>      [<00000000ab943734>] __blk_queue_split+0x355/0x730 block/blk-merge.c:272
>      [<00000000e702c0ac>] blk_mq_make_request+0xb0/0x890 block/blk-mq.c:1943
>      [<000000003c89773a>] generic_make_request block/blk-core.c:1052 [inline]
>      [<000000003c89773a>] generic_make_request+0xf6/0x4a0  
> block/blk-core.c:994
>      [<00000000a4dcaf78>] submit_bio+0x5a/0x1e0 block/blk-core.c:1163
>      [<000000003e1ce7f8>] __blkdev_direct_IO fs/block_dev.c:459 [inline]
>      [<000000003e1ce7f8>] blkdev_direct_IO+0x2b3/0x6d0 fs/block_dev.c:515
>      [<0000000087ec76a4>] generic_file_direct_write+0xb0/0x1a0  
> mm/filemap.c:3230
>      [<00000000ff259b44>] __generic_file_write_iter+0xec/0x230  
> mm/filemap.c:3413
>      [<00000000223d9b6c>] blkdev_write_iter fs/block_dev.c:2026 [inline]
>      [<00000000223d9b6c>] blkdev_write_iter+0xbe/0x160 fs/block_dev.c:2003
>      [<000000003c4a5c94>] call_write_iter include/linux/fs.h:1870 [inline]
>      [<000000003c4a5c94>] aio_write+0x10b/0x1d0 fs/aio.c:1583
>      [<00000000581f0c84>] __io_submit_one fs/aio.c:1815 [inline]
>      [<00000000581f0c84>] io_submit_one+0x59b/0xe50 fs/aio.c:1862
> 
> BUG: memory leak
> unreferenced object 0xffff8881226da540 (size 192):
>    comm "syz-executor332", pid 6977, jiffies 4294941214 (age 19.560s)
>    hex dump (first 32 bytes):
>      00 00 00 00 00 00 00 00 00 f0 bc 28 81 88 ff ff  ...........(....
>      01 c8 60 00 02 0b 00 00 00 00 00 00 00 00 00 00  ..`.............
>    backtrace:
>      [<00000000b06a638e>] kmemleak_alloc_recursive  
> include/linux/kmemleak.h:43 [inline]
>      [<00000000b06a638e>] slab_post_alloc_hook mm/slab.h:522 [inline]
>      [<00000000b06a638e>] slab_alloc mm/slab.c:3319 [inline]
>      [<00000000b06a638e>] kmem_cache_alloc+0x13f/0x2c0 mm/slab.c:3483
>      [<00000000950a289d>] mempool_alloc_slab+0x1e/0x30 mm/mempool.c:513
>      [<00000000bfcc27e2>] mempool_alloc+0x64/0x1b0 mm/mempool.c:393
>      [<00000000cdf95a4a>] bio_alloc_bioset+0x180/0x2c0 block/bio.c:477
>      [<00000000b239bb68>] bio_clone_fast+0x25/0x90 block/bio.c:609
>      [<000000005d58c2dc>] bio_split+0x4a/0xd0 block/bio.c:1856
>      [<00000000ab943734>] blk_bio_segment_split block/blk-merge.c:250  
> [inline]
>      [<00000000ab943734>] __blk_queue_split+0x355/0x730 block/blk-merge.c:272
>      [<00000000e702c0ac>] blk_mq_make_request+0xb0/0x890 block/blk-mq.c:1943
>      [<000000003c89773a>] generic_make_request block/blk-core.c:1052 [inline]
>      [<000000003c89773a>] generic_make_request+0xf6/0x4a0  
> block/blk-core.c:994
>      [<00000000a4dcaf78>] submit_bio+0x5a/0x1e0 block/blk-core.c:1163
>      [<000000003e1ce7f8>] __blkdev_direct_IO fs/block_dev.c:459 [inline]
>      [<000000003e1ce7f8>] blkdev_direct_IO+0x2b3/0x6d0 fs/block_dev.c:515
>      [<0000000087ec76a4>] generic_file_direct_write+0xb0/0x1a0  
> mm/filemap.c:3230
>      [<00000000ff259b44>] __generic_file_write_iter+0xec/0x230  
> mm/filemap.c:3413
>      [<00000000223d9b6c>] blkdev_write_iter fs/block_dev.c:2026 [inline]
>      [<00000000223d9b6c>] blkdev_write_iter+0xbe/0x160 fs/block_dev.c:2003
>      [<000000003c4a5c94>] call_write_iter include/linux/fs.h:1870 [inline]
>      [<000000003c4a5c94>] aio_write+0x10b/0x1d0 fs/aio.c:1583
>      [<00000000581f0c84>] __io_submit_one fs/aio.c:1815 [inline]
>      [<00000000581f0c84>] io_submit_one+0x59b/0xe50 fs/aio.c:1862
> 
> 
> 
> ---
> This bug is generated by a bot. It may contain errors.
> See https://goo.gl/tpsmEJ for more information about syzbot.
> syzbot engineers can be reached at syzkaller@...glegroups.com.
> 
> syzbot will keep track of this bug report. See:
> https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
> syzbot can test patches for this bug, for details see:
> https://goo.gl/tpsmEJ#testing-patches