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BUG: KASAN: use-after-free in __mutex_waiter_is_first kernel/locking/mutex.c:197 [inline]
BUG: KASAN: use-after-free in __mutex_lock_common kernel/locking/mutex.c:681 [inline]
BUG: KASAN: use-after-free in __mutex_lock+0x6d2/0xd80 kernel/locking/mutex.c:747
Read of size 8 at addr ffff888073456108 by task jfsCommit/107
CPU: 0 PID: 107 Comm: jfsCommit Not tainted 6.1.134-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
print_address_description mm/kasan/report.c:316 [inline]
print_report+0x15f/0x4f0 mm/kasan/report.c:427
kasan_report+0x136/0x160 mm/kasan/report.c:531
__mutex_waiter_is_first kernel/locking/mutex.c:197 [inline]
__mutex_lock_common kernel/locking/mutex.c:681 [inline]
__mutex_lock+0x6d2/0xd80 kernel/locking/mutex.c:747
jfs_syncpt+0x22/0x90 fs/jfs/jfs_logmgr.c:1039
txEnd+0x30b/0x560 fs/jfs/jfs_txnmgr.c:549
txLazyCommit fs/jfs/jfs_txnmgr.c:2684 [inline]
jfs_lazycommit+0x610/0xb60 fs/jfs/jfs_txnmgr.c:2732
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
</TASK>
Allocated by task 6269:
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
____kasan_kmalloc mm/kasan/common.c:374 [inline]
__kasan_kmalloc+0x97/0xb0 mm/kasan/common.c:383
kmalloc include/linux/slab.h:563 [inline]
kzalloc include/linux/slab.h:699 [inline]
open_inline_log fs/jfs/jfs_logmgr.c:1159 [inline]
lmLogOpen+0x314/0x1030 fs/jfs/jfs_logmgr.c:1069
jfs_mount_rw+0xe3/0x640 fs/jfs/jfs_mount.c:253
jfs_fill_super+0x67d/0xc40 fs/jfs/super.c:565
mount_bdev+0x2c9/0x3f0 fs/super.c:1443
legacy_get_tree+0xeb/0x180 fs/fs_context.c:632
vfs_get_tree+0x88/0x270 fs/super.c:1573
do_new_mount+0x2ba/0xb40 fs/namespace.c:3056
do_mount fs/namespace.c:3399 [inline]
__do_sys_mount fs/namespace.c:3607 [inline]
__se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3584
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0x80 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
Freed by task 4257:
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
kasan_save_free_info+0x27/0x40 mm/kasan/generic.c:516
____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236
kasan_slab_free include/linux/kasan.h:177 [inline]
slab_free_hook mm/slub.c:1724 [inline]
slab_free_freelist_hook mm/slub.c:1750 [inline]
slab_free mm/slub.c:3661 [inline]
__kmem_cache_free+0x25c/0x3c0 mm/slub.c:3674
lmLogClose+0x29d/0x530 fs/jfs/jfs_logmgr.c:-1
jfs_umount+0x298/0x370 fs/jfs/jfs_umount.c:116
jfs_put_super+0x86/0x180 fs/jfs/super.c:194
generic_shutdown_super+0x130/0x340 fs/super.c:501
kill_block_super+0x7a/0xe0 fs/super.c:1470
deactivate_locked_super+0xa0/0x110 fs/super.c:332
cleanup_mnt+0x490/0x520 fs/namespace.c:1186
task_work_run+0x246/0x300 kernel/task_work.c:203
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0xde/0x100 kernel/entry/common.c:177
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:303
do_syscall_64+0x47/0x80 arch/x86/entry/common.c:87
entry_SYSCALL_64_after_hwframe+0x68/0xd2
The buggy address belongs to the object at ffff888073456000
which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 264 bytes inside of
1024-byte region [ffff888073456000, ffff888073456400)
The buggy address belongs to the physical page:
page:ffffea0001cd1400 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x73450
head:ffffea0001cd1400 order:3 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 0000000000000000 dead000000000001 ffff888017c41dc0
raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d2a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 4373, tgid 4372 (syz.2.10), ts 84850444320, free_ts 84538547197
create_dummy_stack mm/page_owner.c:67 [inline]
register_dummy_stack+0x86/0xe0 mm/page_owner.c:73
init_page_owner+0x30/0x591 mm/page_owner.c:91
invoke_init_callbacks mm/page_ext.c:126 [inline]
page_ext_init+0x732/0x78d mm/page_ext.c:518
kernel_init_freeable+0x450/0x60f init/main.c:1624
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1459 [inline]
free_pcp_prepare mm/page_alloc.c:1509 [inline]
free_unref_page_prepare+0x12a6/0x15b0 mm/page_alloc.c:3384
free_unref_page+0x33/0x3e0 mm/page_alloc.c:3479
free_slab mm/slub.c:2031 [inline]
discard_slab mm/slub.c:2037 [inline]
__unfreeze_partials+0x1b7/0x210 mm/slub.c:2586
put_cpu_partial+0x17b/0x250 mm/slub.c:2662
qlink_free mm/kasan/quarantine.c:168 [inline]
qlist_free_all+0x76/0xe0 mm/kasan/quarantine.c:187
kasan_quarantine_reduce+0x156/0x170 mm/kasan/quarantine.c:294
__kasan_slab_alloc+0x1f/0x70 mm/kasan/common.c:305
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook+0x52/0x3a0 mm/slab.h:737
slab_alloc_node mm/slub.c:3398 [inline]
slab_alloc mm/slub.c:3406 [inline]
__kmem_cache_alloc_lru mm/slub.c:3413 [inline]
kmem_cache_alloc+0x10c/0x2d0 mm/slub.c:3422
getname_flags+0xb8/0x4f0 fs/namei.c:139
getname fs/namei.c:218 [inline]
__do_sys_unlink fs/namei.c:4438 [inline]
__se_sys_unlink fs/namei.c:4436 [inline]
__x64_sys_unlink+0x38/0x50 fs/namei.c:4436
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0x80 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
Memory state around the buggy address:
ffff888073456000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888073456080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888073456100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888073456180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888073456200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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