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Message-ID: <20180906193822.GG5098@thunk.org>
Date: Thu, 6 Sep 2018 15:38:22 -0400
From: "Theodore Y. Ts'o" <tytso@....edu>
To: syzbot <syzbot+0eefc1e06a77d327a056@...kaller.appspotmail.com>
Cc: adilger.kernel@...ger.ca, linux-ext4@...r.kernel.org,
linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: Re: possible deadlock in ext4_evict_inode
On Thu, Sep 06, 2018 at 09:41:04AM -0700, syzbot wrote:
> Hello,
>
> syzbot found the following crash on:
>
> HEAD commit: b36fdc6853a3 Merge tag 'gpio-v4.19-2' of git://git.kernel...
> git tree: upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=1716bc9e400000
> kernel config: https://syzkaller.appspot.com/x/.config?x=6c9564cd177daf0c
> dashboard link: https://syzkaller.appspot.com/bug?extid=0eefc1e06a77d327a056
> compiler: gcc (GCC) 8.0.1 20180413 (experimental)
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13db48be400000
>
> IMPORTANT: if you fix the bug, please add the following tag to the commit:
> Reported-by: syzbot+0eefc1e06a77d327a056@...kaller.appspotmail.com
This looks like it's a Smack issue?
- Ted
>
> 8021q: adding VLAN 0 to HW filter on device team0
> 8021q: adding VLAN 0 to HW filter on device team0
> syz-executor0 (11193) used greatest stack depth: 15352 bytes left
>
> ======================================================
> WARNING: possible circular locking dependency detected
> 4.19.0-rc2+ #1 Not tainted
> ------------------------------------------------------
> syz-executor3/11182 is trying to acquire lock:
> 00000000c157b042 (sb_internal){.+.+}, at: sb_start_intwrite
> include/linux/fs.h:1613 [inline]
> 00000000c157b042 (sb_internal){.+.+}, at: ext4_evict_inode+0x588/0x19b0
> fs/ext4/inode.c:250
>
> but task is already holding lock:
> 00000000128cdd3b (fs_reclaim){+.+.}, at: fs_reclaim_acquire.part.98+0x0/0x30
> mm/page_alloc.c:463
>
> which lock already depends on the new lock.
>
>
> the existing dependency chain (in reverse order) is:
>
> -> #3 (fs_reclaim){+.+.}:
> __fs_reclaim_acquire mm/page_alloc.c:3728 [inline]
> fs_reclaim_acquire.part.98+0x24/0x30 mm/page_alloc.c:3739
> fs_reclaim_acquire+0x14/0x20 mm/page_alloc.c:3740
> slab_pre_alloc_hook mm/slab.h:418 [inline]
> slab_alloc mm/slab.c:3378 [inline]
> kmem_cache_alloc_trace+0x2d/0x730 mm/slab.c:3618
> kmalloc include/linux/slab.h:513 [inline]
> kzalloc include/linux/slab.h:707 [inline]
> smk_fetch.part.24+0x5a/0xf0 security/smack/smack_lsm.c:273
> smk_fetch security/smack/smack_lsm.c:3548 [inline]
> smack_d_instantiate+0x946/0xea0 security/smack/smack_lsm.c:3502
> security_d_instantiate+0x5c/0xf0 security/security.c:1287
> d_instantiate+0x5e/0xa0 fs/dcache.c:1870
> shmem_mknod+0x189/0x1f0 mm/shmem.c:2812
> vfs_mknod+0x447/0x800 fs/namei.c:3719
> handle_create+0x1ff/0x7c0 drivers/base/devtmpfs.c:211
> handle drivers/base/devtmpfs.c:374 [inline]
> devtmpfsd+0x27f/0x4c0 drivers/base/devtmpfs.c:400
> kthread+0x35a/0x420 kernel/kthread.c:246
> ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:413
>
> -> #2 (&isp->smk_lock){+.+.}:
> __mutex_lock_common kernel/locking/mutex.c:925 [inline]
> __mutex_lock+0x171/0x1700 kernel/locking/mutex.c:1073
> mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1088
> smack_d_instantiate+0x130/0xea0 security/smack/smack_lsm.c:3369
> security_d_instantiate+0x5c/0xf0 security/security.c:1287
> d_instantiate_new+0x7e/0x160 fs/dcache.c:1889
> ext4_add_nondir+0x81/0x90 fs/ext4/namei.c:2415
> ext4_symlink+0x761/0x1170 fs/ext4/namei.c:3162
> vfs_symlink+0x37a/0x5d0 fs/namei.c:4127
> do_symlinkat+0x242/0x2d0 fs/namei.c:4154
> __do_sys_symlink fs/namei.c:4173 [inline]
> __se_sys_symlink fs/namei.c:4171 [inline]
> __x64_sys_symlink+0x59/0x80 fs/namei.c:4171
> do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
> entry_SYSCALL_64_after_hwframe+0x49/0xbe
>
> -> #1 (jbd2_handle){++++}:
> start_this_handle+0x5c0/0x1260 fs/jbd2/transaction.c:385
> jbd2__journal_start+0x3c9/0x9f0 fs/jbd2/transaction.c:439
> __ext4_journal_start_sb+0x18d/0x590 fs/ext4/ext4_jbd2.c:81
> ext4_sample_last_mounted fs/ext4/file.c:414 [inline]
> ext4_file_open+0x552/0x7b0 fs/ext4/file.c:439
> do_dentry_open+0x499/0x1250 fs/open.c:771
> vfs_open+0xa0/0xd0 fs/open.c:880
> do_last fs/namei.c:3418 [inline]
> path_openat+0x130f/0x5340 fs/namei.c:3534
> do_filp_open+0x255/0x380 fs/namei.c:3564
> do_open_execat+0x221/0x8e0 fs/exec.c:853
> __do_execve_file.isra.35+0x1707/0x2460 fs/exec.c:1755
> do_execveat_common fs/exec.c:1866 [inline]
> do_execve fs/exec.c:1883 [inline]
> __do_sys_execve fs/exec.c:1964 [inline]
> __se_sys_execve fs/exec.c:1959 [inline]
> __x64_sys_execve+0x8f/0xc0 fs/exec.c:1959
> do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
> entry_SYSCALL_64_after_hwframe+0x49/0xbe
>
> -> #0 (sb_internal){.+.+}:
> lock_acquire+0x1e4/0x4f0 kernel/locking/lockdep.c:3901
> percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:36
> [inline]
> percpu_down_read include/linux/percpu-rwsem.h:59 [inline]
> __sb_start_write+0x1e9/0x300 fs/super.c:1387
> sb_start_intwrite include/linux/fs.h:1613 [inline]
> ext4_evict_inode+0x588/0x19b0 fs/ext4/inode.c:250
> evict+0x4ae/0x990 fs/inode.c:558
> iput_final fs/inode.c:1547 [inline]
> iput+0x5fa/0xa00 fs/inode.c:1573
> dentry_unlink_inode+0x461/0x5e0 fs/dcache.c:374
> __dentry_kill+0x44c/0x7a0 fs/dcache.c:566
> dentry_kill+0xc9/0x5a0 fs/dcache.c:685
> shrink_dentry_list+0x36c/0x7c0 fs/dcache.c:1090
> prune_dcache_sb+0x12f/0x1c0 fs/dcache.c:1171
> super_cache_scan+0x270/0x480 fs/super.c:102
> do_shrink_slab+0x4ba/0xbb0 mm/vmscan.c:536
> shrink_slab_memcg mm/vmscan.c:601 [inline]
> shrink_slab+0x6fe/0x8c0 mm/vmscan.c:674
> shrink_node+0x429/0x16a0 mm/vmscan.c:2735
> shrink_zones mm/vmscan.c:2964 [inline]
> do_try_to_free_pages+0x3e7/0x1290 mm/vmscan.c:3026
> try_to_free_pages+0x4b2/0xa60 mm/vmscan.c:3241
> __perform_reclaim mm/page_alloc.c:3769 [inline]
> __alloc_pages_direct_reclaim mm/page_alloc.c:3790 [inline]
> __alloc_pages_slowpath+0x95a/0x2cb0 mm/page_alloc.c:4191
> __alloc_pages_nodemask+0xa1b/0xd10 mm/page_alloc.c:4390
> __alloc_pages include/linux/gfp.h:473 [inline]
> __alloc_pages_node include/linux/gfp.h:486 [inline]
> kmem_getpages mm/slab.c:1409 [inline]
> cache_grow_begin+0x91/0x710 mm/slab.c:2677
> fallback_alloc+0x203/0x2c0 mm/slab.c:3219
> ____cache_alloc_node+0x1c7/0x1e0 mm/slab.c:3287
> slab_alloc_node mm/slab.c:3327 [inline]
> kmem_cache_alloc_node_trace+0xe9/0x720 mm/slab.c:3661
> __do_kmalloc_node mm/slab.c:3681 [inline]
> __kmalloc_node+0x33/0x70 mm/slab.c:3689
> kmalloc_node include/linux/slab.h:555 [inline]
> kvmalloc_node+0xb9/0xf0 mm/util.c:423
> kvmalloc include/linux/mm.h:577 [inline]
> sem_alloc ipc/sem.c:497 [inline]
> newary+0x244/0xb50 ipc/sem.c:527
> ipcget_new ipc/util.c:315 [inline]
> ipcget+0x15d/0x11d0 ipc/util.c:614
> ksys_semget+0x1c0/0x280 ipc/sem.c:604
> __do_sys_semget ipc/sem.c:609 [inline]
> __se_sys_semget ipc/sem.c:607 [inline]
> __x64_sys_semget+0x73/0xb0 ipc/sem.c:607
> do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
> entry_SYSCALL_64_after_hwframe+0x49/0xbe
>
> other info that might help us debug this:
>
> Chain exists of:
> sb_internal --> &isp->smk_lock --> fs_reclaim
>
> Possible unsafe locking scenario:
>
> CPU0 CPU1
> ---- ----
> lock(fs_reclaim);
> lock(&isp->smk_lock);
> lock(fs_reclaim);
> lock(sb_internal);
>
> *** DEADLOCK ***
>
> 4 locks held by syz-executor3/11182:
> #0: 000000000ed49aa7 (&ids->rwsem){+.+.}, at: ipcget_new ipc/util.c:314
> [inline]
> #0: 000000000ed49aa7 (&ids->rwsem){+.+.}, at: ipcget+0x125/0x11d0
> ipc/util.c:614
> #1: 00000000128cdd3b (fs_reclaim){+.+.}, at:
> fs_reclaim_acquire.part.98+0x0/0x30 mm/page_alloc.c:463
> #2: 00000000c7d74038 (shrinker_rwsem){++++}, at: shrink_slab_memcg
> mm/vmscan.c:578 [inline]
> #2: 00000000c7d74038 (shrinker_rwsem){++++}, at: shrink_slab+0x1d1/0x8c0
> mm/vmscan.c:674
> #3: 00000000a3e33771 (&type->s_umount_key#28){++++}, at:
> trylock_super+0x22/0x110 fs/super.c:412
>
> stack backtrace:
> CPU: 1 PID: 11182 Comm: syz-executor3 Not tainted 4.19.0-rc2+ #1
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
> Google 01/01/2011
> Call Trace:
> __dump_stack lib/dump_stack.c:77 [inline]
> dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113
> print_circular_bug.isra.34.cold.55+0x1bd/0x27d
> kernel/locking/lockdep.c:1222
> check_prev_add kernel/locking/lockdep.c:1862 [inline]
> check_prevs_add kernel/locking/lockdep.c:1975 [inline]
> validate_chain kernel/locking/lockdep.c:2416 [inline]
> __lock_acquire+0x3449/0x5020 kernel/locking/lockdep.c:3412
> lock_acquire+0x1e4/0x4f0 kernel/locking/lockdep.c:3901
> percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:36 [inline]
> percpu_down_read include/linux/percpu-rwsem.h:59 [inline]
> __sb_start_write+0x1e9/0x300 fs/super.c:1387
> sb_start_intwrite include/linux/fs.h:1613 [inline]
> ext4_evict_inode+0x588/0x19b0 fs/ext4/inode.c:250
> evict+0x4ae/0x990 fs/inode.c:558
> iput_final fs/inode.c:1547 [inline]
> iput+0x5fa/0xa00 fs/inode.c:1573
> dentry_unlink_inode+0x461/0x5e0 fs/dcache.c:374
> __dentry_kill+0x44c/0x7a0 fs/dcache.c:566
> dentry_kill+0xc9/0x5a0 fs/dcache.c:685
> shrink_dentry_list+0x36c/0x7c0 fs/dcache.c:1090
> prune_dcache_sb+0x12f/0x1c0 fs/dcache.c:1171
> super_cache_scan+0x270/0x480 fs/super.c:102
> do_shrink_slab+0x4ba/0xbb0 mm/vmscan.c:536
> shrink_slab_memcg mm/vmscan.c:601 [inline]
> shrink_slab+0x6fe/0x8c0 mm/vmscan.c:674
> shrink_node+0x429/0x16a0 mm/vmscan.c:2735
> shrink_zones mm/vmscan.c:2964 [inline]
> do_try_to_free_pages+0x3e7/0x1290 mm/vmscan.c:3026
> try_to_free_pages+0x4b2/0xa60 mm/vmscan.c:3241
> __perform_reclaim mm/page_alloc.c:3769 [inline]
> __alloc_pages_direct_reclaim mm/page_alloc.c:3790 [inline]
> __alloc_pages_slowpath+0x95a/0x2cb0 mm/page_alloc.c:4191
> __alloc_pages_nodemask+0xa1b/0xd10 mm/page_alloc.c:4390
> __alloc_pages include/linux/gfp.h:473 [inline]
> __alloc_pages_node include/linux/gfp.h:486 [inline]
> kmem_getpages mm/slab.c:1409 [inline]
> cache_grow_begin+0x91/0x710 mm/slab.c:2677
> fallback_alloc+0x203/0x2c0 mm/slab.c:3219
> ____cache_alloc_node+0x1c7/0x1e0 mm/slab.c:3287
> slab_alloc_node mm/slab.c:3327 [inline]
> kmem_cache_alloc_node_trace+0xe9/0x720 mm/slab.c:3661
> __do_kmalloc_node mm/slab.c:3681 [inline]
> __kmalloc_node+0x33/0x70 mm/slab.c:3689
> kmalloc_node include/linux/slab.h:555 [inline]
> kvmalloc_node+0xb9/0xf0 mm/util.c:423
> kvmalloc include/linux/mm.h:577 [inline]
> sem_alloc ipc/sem.c:497 [inline]
> newary+0x244/0xb50 ipc/sem.c:527
> ipcget_new ipc/util.c:315 [inline]
> ipcget+0x15d/0x11d0 ipc/util.c:614
> ksys_semget+0x1c0/0x280 ipc/sem.c:604
> __do_sys_semget ipc/sem.c:609 [inline]
> __se_sys_semget ipc/sem.c:607 [inline]
> __x64_sys_semget+0x73/0xb0 ipc/sem.c:607
> do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
> entry_SYSCALL_64_after_hwframe+0x49/0xbe
> RIP: 0033:0x457099
> Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7
> 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff
> 0f 83 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00
> RSP: 002b:00007fbecf217c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000040
> RAX: ffffffffffffffda RBX: 00007fbecf2186d4 RCX: 0000000000457099
> RDX: 0000000000000000 RSI: 0000000000004007 RDI: 0000000000000000
> RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000
> R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
> R13: 00000000004d4740 R14: 00000000004c8d3e R15: 0000000000000000
> syz-executor4 (11186) used greatest stack depth: 15080 bytes left
> syz-executor7 (11171) used greatest stack depth: 14344 bytes left
> syz-executor2 (11260) used greatest stack depth: 14296 bytes left
> syz-executor0 invoked oom-killer: gfp_mask=0x6200ca(GFP_HIGHUSER_MOVABLE),
> nodemask=(null), order=0, oom_score_adj=0
> syz-executor0 cpuset=syz0 mems_allowed=0
> CPU: 0 PID: 11308 Comm: syz-executor0 Not tainted 4.19.0-rc2+ #1
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
> Google 01/01/2011
> Call Trace:
> __dump_stack lib/dump_stack.c:77 [inline]
> dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113
> dump_header+0x27b/0xf70 mm/oom_kill.c:441
> oom_kill_process.cold.28+0x10/0x95a mm/oom_kill.c:953
> out_of_memory+0xa88/0x1430 mm/oom_kill.c:1120
> __alloc_pages_may_oom mm/page_alloc.c:3522 [inline]
> __alloc_pages_slowpath+0x223f/0x2cb0 mm/page_alloc.c:4235
> __alloc_pages_nodemask+0xa1b/0xd10 mm/page_alloc.c:4390
> alloc_pages_current+0x10c/0x210 mm/mempolicy.c:2093
> alloc_pages include/linux/gfp.h:509 [inline]
> __page_cache_alloc+0x398/0x5e0 mm/filemap.c:946
> page_cache_read mm/filemap.c:2385 [inline]
> filemap_fault+0x1458/0x2220 mm/filemap.c:2569
> ext4_filemap_fault+0x82/0xad fs/ext4/inode.c:6257
> __do_fault+0xee/0x450 mm/memory.c:3240
> do_read_fault mm/memory.c:3652 [inline]
> do_fault mm/memory.c:3752 [inline]
> handle_pte_fault mm/memory.c:3983 [inline]
> __handle_mm_fault+0x2b4a/0x4350 mm/memory.c:4107
> handle_mm_fault+0x53e/0xc80 mm/memory.c:4144
> __do_page_fault+0x620/0xe50 arch/x86/mm/fault.c:1395
> do_page_fault+0xf6/0x7a4 arch/x86/mm/fault.c:1470
> page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1161
> RIP: 0033:0x40a056
> Code: Bad RIP value.
> RSP: 002b:00007ffd766513d0 EFLAGS: 00010283
> RAX: 0000000000730a08 RBX: 00000000009300a0 RCX: 0000000000000001
> RDX: 0000000000000001 RSI: ffffffffffffffff RDI: 00000000004bce88
> RBP: 00000000009300a0 R08: 0000000000000009 R09: 0000000000000001
> R10: 00007ffd766514d0 R11: 0000000000000000 R12: 0000000000930aa0
> R13: 000000000093014c R14: 000000000001f9ab R15: 000000000001f97e
> Mem-Info:
> active_anon:4715 inactive_anon:367 isolated_anon:0
> active_file:31 inactive_file:10 isolated_file:0
> unevictable:0 dirty:0 writeback:0 unstable:0
> slab_reclaimable:11145 slab_unreclaimable:1533913
> mapped:177 shmem:377 pagetables:511 bounce:0
> free:24282 free_pcp:0 free_cma:0
> Node 0 active_anon:18860kB inactive_anon:1468kB active_file:116kB
> inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):56kB
> mapped:708kB dirty:0kB writeback:0kB shmem:1508kB shmem_thp: 0kB
> shmem_pmdmapped: 0kB anon_thp: 6144kB writeback_tmp:0kB unstable:0kB
> all_unreclaimable? yes
> Node 0 DMA free:15908kB min:164kB low:204kB high:244kB active_anon:0kB
> inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB
> writepending:0kB present:15992kB managed:15908kB mlocked:0kB
> kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB
> free_cma:0kB
> lowmem_reserve[]: 0 2842 6348 6348
> Node 0 DMA32 free:44052kB min:30180kB low:37724kB high:45268kB
> active_anon:2056kB inactive_anon:0kB active_file:40kB inactive_file:72kB
> unevictable:0kB writepending:0kB present:3129292kB managed:2914192kB
> mlocked:0kB kernel_stack:32kB pagetables:0kB bounce:0kB free_pcp:0kB
> local_pcp:0kB free_cma:0kB
> lowmem_reserve[]: 0 0 3506 3506
> Node 0 Normal free:37168kB min:37236kB low:46544kB high:55852kB
> active_anon:16804kB inactive_anon:1468kB active_file:176kB inactive_file:0kB
> unevictable:0kB writepending:0kB present:4718592kB managed:3590864kB
> mlocked:0kB kernel_stack:5216kB pagetables:2044kB bounce:0kB free_pcp:0kB
> local_pcp:0kB free_cma:0kB
> lowmem_reserve[]: 0 0 0 0
> Node 0 DMA: 1*4kB (U) 0*8kB 0*16kB 1*32kB (U) 2*64kB (U) 1*128kB (U) 1*256kB
> (U) 0*512kB 1*1024kB (U) 1*2048kB (M) 3*4096kB (M) = 15908kB
> Node 0 DMA32: 5*4kB (ME) 7*8kB (UME) 4*16kB (ME) 4*32kB (ME) 4*64kB (ME)
> 2*128kB (UE) 4*256kB (UME) 3*512kB (ME) 4*1024kB (UME) 4*2048kB (UME)
> 7*4096kB (M) = 44300kB
> Node 0 Normal: 867*4kB (UME) 448*8kB (M) 250*16kB (ME) 106*32kB (ME) 51*64kB
> (ME) 46*128kB (ME) 20*256kB (M) 15*512kB (M) 1*1024kB (E) 0*2048kB 0*4096kB
> = 37420kB
> Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0
> hugepages_size=2048kB
> 424 total pagecache pages
> 0 pages in swap cache
> Swap cache stats: add 0, delete 0, find 0/0
> Free swap = 0kB
> Total swap = 0kB
> 1965969 pages RAM
> 0 pages HighMem/MovableOnly
> 335728 pages reserved
> Unreclaimable slab info:
> Name Used Total
> pid_2 131KB 156KB
> TIPC 12KB 14KB
> SCTPv6 18KB 24KB
> DCCPv6 21KB 29KB
> DCCP 20KB 27KB
> bridge_fdb_cache 15KB 19KB
> fib6_nodes 103KB 108KB
> ip6_dst_cache 113KB 300KB
> RAWv6 87KB 91KB
> UDPv6 3KB 3KB
> TCPv6 29KB 29KB
> nf_conntrack 2KB 3KB
> sd_ext_cdb 0KB 3KB
> scsi_sense_cache 1056KB 1060KB
> virtio_scsi_cmd 16KB 16KB
> sgpool-128 8KB 8KB
> sgpool-64 4KB 6KB
> sgpool-32 2KB 7KB
> sgpool-16 1KB 3KB
> sgpool-8 0KB 3KB
> mqueue_inode_cache 12KB 21KB
> bio_post_read_ctx 14KB 15KB
> bio-2 14KB 15KB
> jfs_mp 7KB 7KB
> nfs_commit_data 3KB 7KB
> nfs_write_data 34KB 37KB
> jbd2_inode 2KB 3KB
> ext4_system_zone 0KB 3KB
> bio-1 1KB 3KB
> pid_namespace 2KB 7KB
> rpc_buffers 17KB 19KB
> rpc_tasks 2KB 3KB
> UNIX 12KB 47KB
> tcp_bind_bucket 1KB 4KB
> ip_fib_trie 14KB 19KB
> ip_fib_alias 69KB 71KB
> ip_dst_cache 0KB 8KB
> RAW 51KB 57KB
> UDP 19KB 39KB
> TCP 5KB 5KB
> hugetlbfs_inode_cache 1KB 7KB
> fscache_cookie_jar 0KB 7KB
> eventpoll_pwq 51KB 51KB
> eventpoll_epi 90KB 90KB
> inotify_inode_mark 90KB 90KB
> request_queue 159KB 159KB
> blkdev_requests 1KB 3KB
> blkdev_ioc 23KB 23KB
> bio-0 536KB 536KB
> biovec-max 1658KB 1658KB
> biovec-64 401KB 401KB
> biovec-16 127KB 127KB
> bio_integrity_payload 1KB 4KB
> khugepaged_mm_slot 27KB 27KB
> dmaengine-unmap-2 0KB 3KB
> skbuff_fclone_cache 1KB 18KB
> skbuff_head_cache 673KB 1916KB
> configfs_dir_cache 0KB 4KB
> file_lock_cache 1KB 7KB
> file_lock_ctx 0KB 3KB
> fsnotify_mark_connector 51KB 51KB
> net_namespace 69KB 69KB
> shmem_inode_cache 3043KB 3043KB
> task_delay_info 125KB 371KB
> taskstats 176KB 176KB
> proc_dir_entry 680KB 682KB
> pde_opener 0KB 3KB
> seq_file 362KB 362KB
> sigqueue 126KB 401KB
> kernfs_node_cache 11279KB 11284KB
> mnt_cache 85KB 108KB
> filp 4848KB 8073KB
> names_cache 121567KB 121567KB
> inode_smack 4817KB 4817KB
> key_jar 3KB 7KB
> uts_namespace 3KB 7KB
> nsproxy 1KB 7KB
> vm_area_struct 8830KB 12970KB
> mm_struct 1462KB 3614KB
> fs_cache 161KB 496KB
> files_cache 538KB 1256KB
> signal_cache 915KB 2185KB
> sighand_cache 395KB 395KB
> task_struct 3249KB 3304KB
> cred_jar 795KB 2348KB
> anon_vma_chain 4757KB 6000KB
> anon_vma 237KB 392KB
> pid 73KB 228KB
> Acpi-Operand 312KB 772KB
> Acpi-Namespace 102KB 104KB
> numa_policy 0KB 3KB
> debug_objects_cache 1125KB 1126KB
> trace_event_file 243KB 247KB
> ftrace_event_field 348KB 350KB
> pool_workqueue 67KB 72KB
> task_group 7KB 7KB
> page->ptl 1564KB 3300KB
> kmalloc-4194304 5713920KB 5713920KB
> kmalloc-2097152 2050KB 2050KB
> kmalloc-524288 2056KB 2056KB
> kmalloc-262144 1290KB 1290KB
> kmalloc-131072 650KB 650KB
> kmalloc-65536 330KB 330KB
> kmalloc-32768 891KB 990KB
> kmalloc-16384 412KB 462KB
> kmalloc-8192 2004KB 2004KB
> kmalloc-4096 18670KB 18708KB
> kmalloc-2048 6464KB 7764KB
> kmalloc-1024 4572KB 5244KB
> kmalloc-512 3885KB 5812KB
> kmalloc-256 4762KB 4762KB
> kmalloc-128 901KB 901KB
> kmalloc-96 1935KB 2112KB
> kmalloc-64 1843KB 1896KB
> kmalloc-32 1849KB 1956KB
> kmalloc-192 2706KB 4076KB
> kmem_cache 221KB 221KB
> Tasks state (memory values in pages):
> [ pid ] uid tgid total_vm rss pgtables_bytes swapents
> oom_score_adj name
> [ 2347] 0 2347 278 186 32768 0 0 none
> [ 2539] 0 2539 5377 170 86016 0 -1000
> udevd
> [ 2754] 0 2754 5376 171 81920 0 -1000
> udevd
> [ 4381] 0 4381 2493 573 65536 0 0
> dhclient
> [ 4544] 0 4544 14267 155 118784 0 0
> rsyslogd
> [ 4587] 0 4587 4725 49 86016 0 0 cron
> [ 4613] 0 4613 12490 153 139264 0 -1000 sshd
> [ 4638] 0 4638 3694 42 69632 0 0
> getty
> [ 4639] 0 4639 3694 39 77824 0 0
> getty
> [ 4640] 0 4640 3694 41 77824 0 0
> getty
> [ 4641] 0 4641 3694 41 77824 0 0
> getty
> [ 4642] 0 4642 3694 39 73728 0 0
> getty
> [ 4643] 0 4643 3694 40 77824 0 0
> getty
> [ 4644] 0 4644 3649 41 73728 0 0
> getty
> [ 4645] 0 4645 5310 115 81920 0 -1000
> udevd
> [ 4663] 0 4663 17821 198 188416 0 0 sshd
> [ 4665] 0 4665 41970 1817 163840 0 0
> syz-execprog
> [ 4676] 0 4676 9360 15 40960 0 0
> syz-executor4
> [ 4678] 0 4678 9360 15 40960 0 0
> syz-executor5
> [ 4677] 0 4677 9359 22 49152 0 0
> syz-executor4
> [ 4681] 0 4681 9360 15 40960 0 0
> syz-executor3
> [ 4682] 0 4682 9360 15 40960 0 0
> syz-executor0
> [ 4683] 0 4683 9359 21 49152 0 0
> syz-executor5
> [ 4685] 0 4685 9360 15 40960 0 0
> syz-executor7
> [ 4686] 0 4686 9359 22 49152 0 0
> syz-executor3
> [ 4687] 0 4687 9360 15 40960 0 0
> syz-executor6
> [ 4688] 0 4688 9359 22 49152 0 0
> syz-executor0
> [ 4689] 0 4689 9359 21 49152 0 0
> syz-executor7
> [ 4690] 0 4690 9360 15 40960 0 0
> syz-executor2
> [ 4691] 0 4691 9359 22 49152 0 0
> syz-executor6
> [ 4692] 0 4692 9360 14 40960 0 0
> syz-executor1
> [ 4693] 0 4693 9359 22 49152 0 0
> syz-executor2
> [ 4694] 0 4694 9359 21 53248 0 0
> syz-executor1
> [ 6704] 0 6704 5310 115 81920 0 -1000
> udevd
> [ 6710] 0 6710 5310 115 81920 0 -1000
> udevd
> [ 6737] 0 6737 5376 171 81920 0 -1000
> udevd
> [ 6804] 0 6804 5376 172 81920 0 -1000
> udevd
> [ 6819] 0 6819 5376 172 81920 0 -1000
> udevd
> [ 7149] 0 7149 5376 172 81920 0 -1000
> udevd
> [ 11308] 0 11308 9425 22 61440 0 0
> syz-executor0
> [ 11311] 0 11311 9425 534 61440 0 0
> syz-executor6
> Out of memory: Kill process 4665 (syz-execprog) score 1 or sacrifice child
> Killed process 4676 (syz-executor4) total-vm:37440kB, anon-rss:60kB,
> file-rss:0kB, shmem-rss:0kB
> syz-executor0 (11308) used greatest stack depth: 14040 bytes left
> device bridge_slave_1 left promiscuous mode
> bridge0: port 2(bridge_slave_1) entered disabled state
> device bridge_slave_0 left promiscuous mode
> bridge0: port 1(bridge_slave_0) entered disabled state
> team0 (unregistering): Port device team_slave_1 removed
> IPVS: ftp: loaded support on port[0] = 21
> team0 (unregistering): Port device team_slave_0 removed
> bond0 (unregistering): Releasing backup interface bond_slave_1
> bond0 (unregistering): Releasing backup interface bond_slave_0
> bond0 (unregistering): Released all slaves
> bridge0: port 1(bridge_slave_0) entered blocking state
> bridge0: port 1(bridge_slave_0) entered disabled state
> device bridge_slave_0 entered promiscuous mode
> bridge0: port 2(bridge_slave_1) entered blocking state
> bridge0: port 2(bridge_slave_1) entered disabled state
> device bridge_slave_1 entered promiscuous mode
> IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready
> IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready
> bond0: Enslaving bond_slave_0 as an active interface with an up link
> bond0: Enslaving bond_slave_1 as an active interface with an up link
> IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready
> team0: Port device team_slave_0 added
> IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready
> team0: Port device team_slave_1 added
> IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready
> IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready
> IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready
> IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready
> IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready
> IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready
> IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready
> IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready
> IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready
> IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready
> IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready
> IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready
> bridge0: port 2(bridge_slave_1) entered blocking state
> bridge0: port 2(bridge_slave_1) entered forwarding state
> bridge0: port 1(bridge_slave_0) entered blocking state
> bridge0: port 1(bridge_slave_0) entered forwarding state
> IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready
> 8021q: adding VLAN 0 to HW filter on device bond0
> IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready
> IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready
> IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready
> IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
> IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready
> 8021q: adding VLAN 0 to HW filter on device team0
> IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready
> IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready
>
>
> ---
> 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#bug-status-tracking for how to communicate with
> syzbot.
> syzbot can test patches for this bug, for details see:
> https://goo.gl/tpsmEJ#testing-patches
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