[moderation] [fuse?] KASAN: slab-use-after-free Read in fuse_dev_do_write
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syzbot
8:13 PM (3 hours ago) 8:13 PM
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Hello,
syzbot found the following issue on:
HEAD commit: c21bb4193868 Merge tag 'for_linus' of git://git.kernel.org..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=104a0e49580000
kernel config: https://syzkaller.appspot.com/x/.config?x=4e38b15c29e6a1d9
dashboard link: https://syzkaller.appspot.com/bug?extid=f6e8a3b65040c7c33d77
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
CC: [fuse-...@lists.linux.dev linux-...@vger.kernel.org linux-...@vger.kernel.org mik...@szeredi.hu]
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/cf4c0f46390e/disk-c21bb419.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/21802e5d4446/vmlinux-c21bb419.xz
kernel image: https://storage.googleapis.com/syzbot-assets/6c46db810c9d/bzImage-c21bb419.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+f6e8a3...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: slab-use-after-free in fuse_dev_do_write+0xb54/0xbf0 fs/fuse/dev.c:1940
Read of size 2 at addr ffff88802990801b by task syz.6.1795/14368
CPU: 0 UID: 0 PID: 14368 Comm: syz.6.1795 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
Call Trace:
<TASK>
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
print_address_description+0x55/0x1e0 mm/kasan/report.c:378
print_report+0x58/0x70 mm/kasan/report.c:482
kasan_report+0x117/0x150 mm/kasan/report.c:595
fuse_dev_do_write+0xb54/0xbf0 fs/fuse/dev.c:1940
fuse_dev_write+0x18c/0x230 fs/fuse/dev.c:1981
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x612/0xba0 fs/read_write.c:687
ksys_write+0x150/0x270 fs/read_write.c:739
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f274015e90e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 <c3> 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007f27410d9f68 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f27410da6c0 RCX: 00007f274015e90e
RDX: 0000000000000050 RSI: 0000200000006100 RDI: 0000000000000005
RBP: 0000000000000068 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005
R13: 0000200000006d80 R14: 00007f2740425fa0 R15: 00007ffc707d4e08
</TASK>
Allocated by task 14378:
kasan_save_stack mm/kasan/common.c:57 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
poison_kmalloc_redzone mm/kasan/common.c:398 [inline]
__kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415
kasan_kmalloc include/linux/kasan.h:263 [inline]
__kmalloc_cache_noprof+0x32d/0x660 mm/slub.c:5489
_kmalloc_noprof include/linux/slab.h:988 [inline]
_kzalloc_noprof include/linux/slab.h:1309 [inline]
fuse_new_init fs/fuse/inode.c:1445 [inline]
fuse_send_init+0x58/0x820 fs/fuse/inode.c:1506
vfs_get_super fs/super.c:1273 [inline]
get_tree_nodev+0xbb/0x150 fs/super.c:1292
fuse_get_tree+0x29d/0x3b0 fs/fuse/inode.c:1899
vfs_get_tree+0x92/0x2a0 fs/super.c:1700
fc_mount fs/namespace.c:1198 [inline]
do_new_mount_fc fs/namespace.c:3765 [inline]
do_new_mount+0x319/0xdc0 fs/namespace.c:3841
do_mount fs/namespace.c:4174 [inline]
__do_sys_mount fs/namespace.c:4390 [inline]
__se_sys_mount+0x31d/0x420 fs/namespace.c:4367
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 14378:
kasan_save_stack mm/kasan/common.c:57 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:584
poison_slab_object mm/kasan/common.c:253 [inline]
__kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285
kasan_slab_free include/linux/kasan.h:235 [inline]
slab_free_hook mm/slub.c:2677 [inline]
slab_free mm/slub.c:6377 [inline]
kfree+0x1c5/0x640 mm/slub.c:6692
process_init_reply+0x174/0x21b0 fs/fuse/inode.c:1424
fuse_send_init+0x506/0x820 fs/fuse/inode.c:1521
vfs_get_super fs/super.c:1273 [inline]
get_tree_nodev+0xbb/0x150 fs/super.c:1292
fuse_get_tree+0x29d/0x3b0 fs/fuse/inode.c:1899
vfs_get_tree+0x92/0x2a0 fs/super.c:1700
fc_mount fs/namespace.c:1198 [inline]
do_new_mount_fc fs/namespace.c:3765 [inline]
do_new_mount+0x319/0xdc0 fs/namespace.c:3841
do_mount fs/namespace.c:4174 [inline]
__do_sys_mount fs/namespace.c:4390 [inline]
__se_sys_mount+0x31d/0x420 fs/namespace.c:4367
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff888029908000
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 27 bytes inside of
freed 512-byte region [ffff888029908000, ffff888029908200)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x29908
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff88801b001c80 dead000000000100 dead000000000122
raw: 0000000000000000 0000000800100010 00000000f5000000 0000000000000000
head: 00fff00000000040 ffff88801b001c80 dead000000000100 dead000000000122
head: 0000000000000000 0000000800100010 00000000f5000000 0000000000000000
head: 00fff00000000002 ffffffffffffff01 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 11745940408, free_ts 11745170687
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1f9/0x250 mm/page_alloc.c:1859
prep_new_page mm/page_alloc.c:1867 [inline]
get_page_from_freelist+0x21fa/0x2270 mm/page_alloc.c:3946
__alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5304
alloc_slab_page mm/slub.c:3266 [inline]
allocate_slab+0x79/0x5e0 mm/slub.c:3380
new_slab mm/slub.c:3426 [inline]
refill_objects+0x2d5/0x350 mm/slub.c:7310
refill_sheaf mm/slub.c:2804 [inline]
__pcs_replace_empty_main+0x2bf/0x6b0 mm/slub.c:4675
alloc_from_pcs mm/slub.c:4773 [inline]
slab_alloc_node mm/slub.c:4905 [inline]
__kmalloc_cache_noprof+0x3a7/0x660 mm/slub.c:5485
_kmalloc_noprof include/linux/slab.h:988 [inline]
_kzalloc_noprof include/linux/slab.h:1309 [inline]
device_private_init drivers/base/core.c:3602 [inline]
device_add+0xb6/0xb80 drivers/base/core.c:3653
workqueue_sysfs_register+0x12b/0x300 kernel/workqueue.c:7614
__alloc_workqueue+0x1c75/0x2060 kernel/workqueue.c:5911
alloc_workqueue_va kernel/workqueue.c:5946 [inline]
alloc_workqueue_noprof+0xe3/0x210 kernel/workqueue.c:5962
tty_register_driver+0x2f0/0xdf0 drivers/tty/tty_io.c:3451
usb_serial_init+0x1e3/0x350 drivers/usb/serial/usb-serial.c:1339
do_one_initcall+0x250/0x870 init/main.c:1347
do_initcall_level+0x10a/0x1a0 init/main.c:1409
do_initcalls+0x59/0xa0 init/main.c:1425
page last free pid 13 tgid 13 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
__free_pages_prepare mm/page_alloc.c:1406 [inline]
__free_frozen_pages+0xc1e/0xd10 mm/page_alloc.c:2950
sbitmap_free include/linux/sbitmap.h:188 [inline]
scsi_device_dev_release+0x5c8/0xee0 drivers/scsi/scsi_sysfs.c:481
device_release+0xc4/0x1f0 drivers/base/core.c:-1
kobject_cleanup lib/kobject.c:689 [inline]
kobject_release lib/kobject.c:720 [inline]
kref_put include/linux/kref.h:65 [inline]
kobject_put+0x222/0x550 lib/kobject.c:737
scsi_probe_and_add_lun+0x31cb/0x4b10 drivers/scsi/scsi_scan.c:-1
__scsi_scan_target+0x1f0/0xe10 drivers/scsi/scsi_scan.c:1797
scsi_scan_channel drivers/scsi/scsi_scan.c:1885 [inline]
scsi_scan_host_selected+0x3d3/0x7a0 drivers/scsi/scsi_scan.c:1914
do_scsi_scan_host drivers/scsi/scsi_scan.c:2047 [inline]
do_scan_async+0x10e/0x660 drivers/scsi/scsi_scan.c:2057
async_run_entry_fn+0x9d/0x430 kernel/async.c:129
process_one_work kernel/workqueue.c:3322 [inline]
process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3405
worker_thread+0xa47/0xfb0 kernel/workqueue.c:3486
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Memory state around the buggy address:
ffff888029907f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff888029907f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff888029908000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888029908080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888029908100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
---
This report 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 syzk...@googlegroups.com.
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If the report is already addressed, let syzbot know by replying with:
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If you want to overwrite report's subsystems, reply with:
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If the report is a duplicate of another one, reply with:
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If you want to undo deduplication, reply with:
#syz undup
syzbot found the following issue on:
HEAD commit: c21bb4193868 Merge tag 'for_linus' of git://git.kernel.org..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=104a0e49580000
kernel config: https://syzkaller.appspot.com/x/.config?x=4e38b15c29e6a1d9
dashboard link: https://syzkaller.appspot.com/bug?extid=f6e8a3b65040c7c33d77
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
CC: [fuse-...@lists.linux.dev linux-...@vger.kernel.org linux-...@vger.kernel.org mik...@szeredi.hu]
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/cf4c0f46390e/disk-c21bb419.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/21802e5d4446/vmlinux-c21bb419.xz
kernel image: https://storage.googleapis.com/syzbot-assets/6c46db810c9d/bzImage-c21bb419.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+f6e8a3...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: slab-use-after-free in fuse_dev_do_write+0xb54/0xbf0 fs/fuse/dev.c:1940
Read of size 2 at addr ffff88802990801b by task syz.6.1795/14368
CPU: 0 UID: 0 PID: 14368 Comm: syz.6.1795 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
Call Trace:
<TASK>
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
print_address_description+0x55/0x1e0 mm/kasan/report.c:378
print_report+0x58/0x70 mm/kasan/report.c:482
kasan_report+0x117/0x150 mm/kasan/report.c:595
fuse_dev_do_write+0xb54/0xbf0 fs/fuse/dev.c:1940
fuse_dev_write+0x18c/0x230 fs/fuse/dev.c:1981
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x612/0xba0 fs/read_write.c:687
ksys_write+0x150/0x270 fs/read_write.c:739
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f274015e90e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 <c3> 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007f27410d9f68 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f27410da6c0 RCX: 00007f274015e90e
RDX: 0000000000000050 RSI: 0000200000006100 RDI: 0000000000000005
RBP: 0000000000000068 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005
R13: 0000200000006d80 R14: 00007f2740425fa0 R15: 00007ffc707d4e08
</TASK>
Allocated by task 14378:
kasan_save_stack mm/kasan/common.c:57 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
poison_kmalloc_redzone mm/kasan/common.c:398 [inline]
__kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415
kasan_kmalloc include/linux/kasan.h:263 [inline]
__kmalloc_cache_noprof+0x32d/0x660 mm/slub.c:5489
_kmalloc_noprof include/linux/slab.h:988 [inline]
_kzalloc_noprof include/linux/slab.h:1309 [inline]
fuse_new_init fs/fuse/inode.c:1445 [inline]
fuse_send_init+0x58/0x820 fs/fuse/inode.c:1506
vfs_get_super fs/super.c:1273 [inline]
get_tree_nodev+0xbb/0x150 fs/super.c:1292
fuse_get_tree+0x29d/0x3b0 fs/fuse/inode.c:1899
vfs_get_tree+0x92/0x2a0 fs/super.c:1700
fc_mount fs/namespace.c:1198 [inline]
do_new_mount_fc fs/namespace.c:3765 [inline]
do_new_mount+0x319/0xdc0 fs/namespace.c:3841
do_mount fs/namespace.c:4174 [inline]
__do_sys_mount fs/namespace.c:4390 [inline]
__se_sys_mount+0x31d/0x420 fs/namespace.c:4367
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 14378:
kasan_save_stack mm/kasan/common.c:57 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:584
poison_slab_object mm/kasan/common.c:253 [inline]
__kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285
kasan_slab_free include/linux/kasan.h:235 [inline]
slab_free_hook mm/slub.c:2677 [inline]
slab_free mm/slub.c:6377 [inline]
kfree+0x1c5/0x640 mm/slub.c:6692
process_init_reply+0x174/0x21b0 fs/fuse/inode.c:1424
fuse_send_init+0x506/0x820 fs/fuse/inode.c:1521
vfs_get_super fs/super.c:1273 [inline]
get_tree_nodev+0xbb/0x150 fs/super.c:1292
fuse_get_tree+0x29d/0x3b0 fs/fuse/inode.c:1899
vfs_get_tree+0x92/0x2a0 fs/super.c:1700
fc_mount fs/namespace.c:1198 [inline]
do_new_mount_fc fs/namespace.c:3765 [inline]
do_new_mount+0x319/0xdc0 fs/namespace.c:3841
do_mount fs/namespace.c:4174 [inline]
__do_sys_mount fs/namespace.c:4390 [inline]
__se_sys_mount+0x31d/0x420 fs/namespace.c:4367
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff888029908000
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 27 bytes inside of
freed 512-byte region [ffff888029908000, ffff888029908200)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x29908
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff88801b001c80 dead000000000100 dead000000000122
raw: 0000000000000000 0000000800100010 00000000f5000000 0000000000000000
head: 00fff00000000040 ffff88801b001c80 dead000000000100 dead000000000122
head: 0000000000000000 0000000800100010 00000000f5000000 0000000000000000
head: 00fff00000000002 ffffffffffffff01 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 11745940408, free_ts 11745170687
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1f9/0x250 mm/page_alloc.c:1859
prep_new_page mm/page_alloc.c:1867 [inline]
get_page_from_freelist+0x21fa/0x2270 mm/page_alloc.c:3946
__alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5304
alloc_slab_page mm/slub.c:3266 [inline]
allocate_slab+0x79/0x5e0 mm/slub.c:3380
new_slab mm/slub.c:3426 [inline]
refill_objects+0x2d5/0x350 mm/slub.c:7310
refill_sheaf mm/slub.c:2804 [inline]
__pcs_replace_empty_main+0x2bf/0x6b0 mm/slub.c:4675
alloc_from_pcs mm/slub.c:4773 [inline]
slab_alloc_node mm/slub.c:4905 [inline]
__kmalloc_cache_noprof+0x3a7/0x660 mm/slub.c:5485
_kmalloc_noprof include/linux/slab.h:988 [inline]
_kzalloc_noprof include/linux/slab.h:1309 [inline]
device_private_init drivers/base/core.c:3602 [inline]
device_add+0xb6/0xb80 drivers/base/core.c:3653
workqueue_sysfs_register+0x12b/0x300 kernel/workqueue.c:7614
__alloc_workqueue+0x1c75/0x2060 kernel/workqueue.c:5911
alloc_workqueue_va kernel/workqueue.c:5946 [inline]
alloc_workqueue_noprof+0xe3/0x210 kernel/workqueue.c:5962
tty_register_driver+0x2f0/0xdf0 drivers/tty/tty_io.c:3451
usb_serial_init+0x1e3/0x350 drivers/usb/serial/usb-serial.c:1339
do_one_initcall+0x250/0x870 init/main.c:1347
do_initcall_level+0x10a/0x1a0 init/main.c:1409
do_initcalls+0x59/0xa0 init/main.c:1425
page last free pid 13 tgid 13 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
__free_pages_prepare mm/page_alloc.c:1406 [inline]
__free_frozen_pages+0xc1e/0xd10 mm/page_alloc.c:2950
sbitmap_free include/linux/sbitmap.h:188 [inline]
scsi_device_dev_release+0x5c8/0xee0 drivers/scsi/scsi_sysfs.c:481
device_release+0xc4/0x1f0 drivers/base/core.c:-1
kobject_cleanup lib/kobject.c:689 [inline]
kobject_release lib/kobject.c:720 [inline]
kref_put include/linux/kref.h:65 [inline]
kobject_put+0x222/0x550 lib/kobject.c:737
scsi_probe_and_add_lun+0x31cb/0x4b10 drivers/scsi/scsi_scan.c:-1
__scsi_scan_target+0x1f0/0xe10 drivers/scsi/scsi_scan.c:1797
scsi_scan_channel drivers/scsi/scsi_scan.c:1885 [inline]
scsi_scan_host_selected+0x3d3/0x7a0 drivers/scsi/scsi_scan.c:1914
do_scsi_scan_host drivers/scsi/scsi_scan.c:2047 [inline]
do_scan_async+0x10e/0x660 drivers/scsi/scsi_scan.c:2057
async_run_entry_fn+0x9d/0x430 kernel/async.c:129
process_one_work kernel/workqueue.c:3322 [inline]
process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3405
worker_thread+0xa47/0xfb0 kernel/workqueue.c:3486
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Memory state around the buggy address:
ffff888029907f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff888029907f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff888029908000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888029908080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888029908100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
---
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