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Message-ID: <000000000000b2ebce062040c030@google.com>
Date: Thu, 22 Aug 2024 00:39:03 -0700
From: syzbot <syzbot+d16facb00df3f446511c@...kaller.appspotmail.com>
To: linux-kernel@...r.kernel.org, lizhi.xu@...driver.com,
syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [jfs?] KASAN: slab-use-after-free Read in lmLogInit
Hello,
syzbot has tested the proposed patch but the reproducer is still triggering an issue:
KASAN: slab-use-after-free Read in lmLogInit
syz.0.727: attempt to access beyond end of device
loop0: rw=2049, sector=30728, nr_sectors = 8 limit=0
lbmIODone: I/O error in JFS log
==================================================================
BUG: KASAN: slab-use-after-free in lbmLogShutdown fs/jfs/jfs_logmgr.c:1863 [inline]
BUG: KASAN: slab-use-after-free in lmLogInit+0xc9f/0x1c90 fs/jfs/jfs_logmgr.c:1416
Read of size 8 at addr ffff888040e8ae18 by task syz.0.727/7934
CPU: 0 UID: 0 PID: 7934 Comm: syz.0.727 Not tainted 6.11.0-rc3-syzkaller-00306-gdf6cbc62cc9b-dirty #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:93 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119
print_address_description mm/kasan/report.c:377 [inline]
print_report+0x169/0x550 mm/kasan/report.c:488
kasan_report+0x143/0x180 mm/kasan/report.c:601
lbmLogShutdown fs/jfs/jfs_logmgr.c:1863 [inline]
lmLogInit+0xc9f/0x1c90 fs/jfs/jfs_logmgr.c:1416
open_inline_log fs/jfs/jfs_logmgr.c:1175 [inline]
lmLogOpen+0x55e/0x1040 fs/jfs/jfs_logmgr.c:1069
jfs_mount_rw+0xf1/0x6a0 fs/jfs/jfs_mount.c:257
jfs_fill_super+0x681/0xc50 fs/jfs/super.c:565
mount_bdev+0x20a/0x2d0 fs/super.c:1679
legacy_get_tree+0xee/0x190 fs/fs_context.c:662
vfs_get_tree+0x90/0x2a0 fs/super.c:1800
do_new_mount+0x2be/0xb40 fs/namespace.c:3472
do_mount fs/namespace.c:3812 [inline]
__do_sys_mount fs/namespace.c:4020 [inline]
__se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3997
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7c1457b0ba
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 7e 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f7c1530be68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f7c1530bef0 RCX: 00007f7c1457b0ba
RDX: 0000000020005d40 RSI: 0000000020005d80 RDI: 00007f7c1530beb0
RBP: 0000000020005d40 R08: 00007f7c1530bef0 R09: 0000000000000810
R10: 0000000000000810 R11: 0000000000000246 R12: 0000000020005d80
R13: 00007f7c1530beb0 R14: 0000000000005e1a R15: 0000000020000400
</TASK>
Allocated by task 7934:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:370 [inline]
__kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:387
kasan_kmalloc include/linux/kasan.h:211 [inline]
__kmalloc_cache_noprof+0x19c/0x2c0 mm/slub.c:4189
kmalloc_noprof include/linux/slab.h:681 [inline]
lbmLogInit fs/jfs/jfs_logmgr.c:1822 [inline]
lmLogInit+0x3b4/0x1c90 fs/jfs/jfs_logmgr.c:1270
open_inline_log fs/jfs/jfs_logmgr.c:1175 [inline]
lmLogOpen+0x55e/0x1040 fs/jfs/jfs_logmgr.c:1069
jfs_mount_rw+0xf1/0x6a0 fs/jfs/jfs_mount.c:257
jfs_fill_super+0x681/0xc50 fs/jfs/super.c:565
mount_bdev+0x20a/0x2d0 fs/super.c:1679
legacy_get_tree+0xee/0x190 fs/fs_context.c:662
vfs_get_tree+0x90/0x2a0 fs/super.c:1800
do_new_mount+0x2be/0xb40 fs/namespace.c:3472
do_mount fs/namespace.c:3812 [inline]
__do_sys_mount fs/namespace.c:4020 [inline]
__se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3997
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 7934:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579
poison_slab_object+0xe0/0x150 mm/kasan/common.c:240
__kasan_slab_free+0x37/0x60 mm/kasan/common.c:256
kasan_slab_free include/linux/kasan.h:184 [inline]
slab_free_hook mm/slub.c:2252 [inline]
slab_free mm/slub.c:4473 [inline]
kfree+0x149/0x360 mm/slub.c:4594
lbmLogShutdown fs/jfs/jfs_logmgr.c:1865 [inline]
lmLogInit+0xccd/0x1c90 fs/jfs/jfs_logmgr.c:1416
open_inline_log fs/jfs/jfs_logmgr.c:1175 [inline]
lmLogOpen+0x55e/0x1040 fs/jfs/jfs_logmgr.c:1069
jfs_mount_rw+0xf1/0x6a0 fs/jfs/jfs_mount.c:257
jfs_fill_super+0x681/0xc50 fs/jfs/super.c:565
mount_bdev+0x20a/0x2d0 fs/super.c:1679
legacy_get_tree+0xee/0x190 fs/fs_context.c:662
vfs_get_tree+0x90/0x2a0 fs/super.c:1800
do_new_mount+0x2be/0xb40 fs/namespace.c:3472
do_mount fs/namespace.c:3812 [inline]
__do_sys_mount fs/namespace.c:4020 [inline]
__se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3997
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff888040e8ae00
which belongs to the cache kmalloc-192 of size 192
The buggy address is located 24 bytes inside of
freed 192-byte region [ffff888040e8ae00, ffff888040e8aec0)
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x40e8a
anon flags: 0x4fff00000000000(node=1|zone=1|lastcpupid=0x7ff)
page_type: 0xfdffffff(slab)
raw: 04fff00000000000 ffff8880158413c0 0000000000000000 dead000000000001
raw: 0000000000000000 0000000000100010 00000001fdffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x152cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 5543, tgid 5543 (syz-executor), ts 167948790919, free_ts 164683488006
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1493
prep_new_page mm/page_alloc.c:1501 [inline]
get_page_from_freelist+0x2e4c/0x2f10 mm/page_alloc.c:3442
__alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4700
__alloc_pages_node_noprof include/linux/gfp.h:269 [inline]
alloc_pages_node_noprof include/linux/gfp.h:296 [inline]
alloc_slab_page+0x5f/0x120 mm/slub.c:2321
allocate_slab+0x5a/0x2f0 mm/slub.c:2484
new_slab mm/slub.c:2537 [inline]
___slab_alloc+0xcd1/0x14b0 mm/slub.c:3723
__slab_alloc+0x58/0xa0 mm/slub.c:3813
__slab_alloc_node mm/slub.c:3866 [inline]
slab_alloc_node mm/slub.c:4025 [inline]
__do_kmalloc_node mm/slub.c:4157 [inline]
__kmalloc_noprof+0x25a/0x400 mm/slub.c:4170
kmalloc_noprof include/linux/slab.h:685 [inline]
kzalloc_noprof include/linux/slab.h:807 [inline]
ops_init+0x8b/0x610 net/core/net_namespace.c:129
setup_net+0x515/0xca0 net/core/net_namespace.c:343
copy_net_ns+0x4e2/0x7b0 net/core/net_namespace.c:508
create_new_namespaces+0x425/0x7b0 kernel/nsproxy.c:110
unshare_nsproxy_namespaces+0x124/0x180 kernel/nsproxy.c:228
ksys_unshare+0x619/0xc10 kernel/fork.c:3328
__do_sys_unshare kernel/fork.c:3399 [inline]
__se_sys_unshare kernel/fork.c:3397 [inline]
__x64_sys_unshare+0x38/0x40 kernel/fork.c:3397
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
page last free pid 5500 tgid 5500 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1094 [inline]
free_unref_folios+0x103a/0x1b00 mm/page_alloc.c:2660
folios_put_refs+0x76e/0x860 mm/swap.c:1039
free_pages_and_swap_cache+0x2ea/0x690 mm/swap_state.c:332
__tlb_batch_free_encoded_pages mm/mmu_gather.c:136 [inline]
tlb_batch_pages_flush mm/mmu_gather.c:149 [inline]
tlb_flush_mmu_free mm/mmu_gather.c:366 [inline]
tlb_flush_mmu+0x3a3/0x680 mm/mmu_gather.c:373
tlb_finish_mmu+0xd4/0x200 mm/mmu_gather.c:465
unmap_region+0x2df/0x350 mm/mmap.c:2441
do_vmi_align_munmap+0x1122/0x18c0 mm/mmap.c:2754
do_vmi_munmap+0x261/0x2f0 mm/mmap.c:2830
__vm_munmap+0x1fc/0x400 mm/mmap.c:3109
__do_sys_munmap mm/mmap.c:3126 [inline]
__se_sys_munmap mm/mmap.c:3123 [inline]
__x64_sys_munmap+0x68/0x80 mm/mmap.c:3123
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Memory state around the buggy address:
ffff888040e8ad00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff888040e8ad80: 00 00 00 00 00 00 00 06 fc fc fc fc fc fc fc fc
>ffff888040e8ae00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888040e8ae80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
ffff888040e8af00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
Tested on:
commit: df6cbc62 Merge tag 'scsi-fixes' of git://git.kernel.or..
git tree: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
console output: https://syzkaller.appspot.com/x/log.txt?x=1728576b980000
kernel config: https://syzkaller.appspot.com/x/.config?x=7229118d88b4a71b
dashboard link: https://syzkaller.appspot.com/bug?extid=d16facb00df3f446511c
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
patch: https://syzkaller.appspot.com/x/patch.diff?x=15d3cbd5980000
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