==================================================================
BUG: KASAN: use-after-free in instrument_atomic_read include/linux/instrumented.h:71 [inline]
BUG: KASAN: use-after-free in atomic_long_read include/linux/atomic/atomic-instrumented.h:1183 [inline]
BUG: KASAN: use-after-free in __down_read_trylock kernel/locking/rwsem.c:1348 [inline]
BUG: KASAN: use-after-free in down_read_trylock+0xb5/0x7d0 kernel/locking/rwsem.c:1624
Read of size 8 at addr ffff8881199aa070 by task kworker/u4:2/45
CPU: 0 PID: 45 Comm: kworker/u4:2 Tainted: G W 5.15.175-syzkaller-00803-g19092c8155b4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: writeback wb_workfn (flush-7:3)
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x151/0x1c0 lib/dump_stack.c:106
print_address_description+0x87/0x3b0 mm/kasan/report.c:248
__kasan_report mm/kasan/report.c:427 [inline]
kasan_report+0x179/0x1c0 mm/kasan/report.c:444
kasan_check_range+0x293/0x2a0 mm/kasan/generic.c:189
__kasan_check_read+0x11/0x20 mm/kasan/shadow.c:31
instrument_atomic_read include/linux/instrumented.h:71 [inline]
atomic_long_read include/linux/atomic/atomic-instrumented.h:1183 [inline]
__down_read_trylock kernel/locking/rwsem.c:1348 [inline]
down_read_trylock+0xb5/0x7d0 kernel/locking/rwsem.c:1624
trylock_super+0x1f/0xf0 fs/super.c:418
__writeback_inodes_wb+0x101/0x3f0 fs/fs-writeback.c:1992
wb_writeback+0x3cd/0x9e0 fs/fs-writeback.c:2106
wb_check_background_flush fs/fs-writeback.c:2172 [inline]
wb_do_writeback fs/fs-writeback.c:2260 [inline]
wb_workfn+0xc12/0x1110 fs/fs-writeback.c:2288
process_one_work+0x6bb/0xc10 kernel/workqueue.c:2325
worker_thread+0xad5/0x12a0 kernel/workqueue.c:2472
kthread+0x421/0x510 kernel/kthread.c:337
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
</TASK>
Allocated by task 13737:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track mm/kasan/common.c:45 [inline]
set_alloc_info mm/kasan/common.c:433 [inline]
____kasan_kmalloc+0xdb/0x110 mm/kasan/common.c:512
__kasan_kmalloc+0x9/0x10 mm/kasan/common.c:521
kasan_kmalloc include/linux/kasan.h:227 [inline]
kmem_cache_alloc_trace+0x11a/0x270 mm/slub.c:3269
kmalloc include/linux/slab.h:603 [inline]
kzalloc include/linux/slab.h:733 [inline]
alloc_super+0x5d/0x7d0 fs/super.c:203
sget+0x1e5/0x4c0 fs/super.c:637
mount_bdev+0xea/0x3b0 fs/super.c:1373
f2fs_mount+0x34/0x40 fs/f2fs/super.c:4618
legacy_get_tree+0xf1/0x190 fs/fs_context.c:611
vfs_get_tree+0x88/0x290 fs/super.c:1530
do_new_mount+0x2ba/0xb30 fs/namespace.c:3012
path_mount+0x671/0x1070 fs/namespace.c:3342
do_mount fs/namespace.c:3355 [inline]
__do_sys_mount fs/namespace.c:3563 [inline]
__se_sys_mount+0x2c4/0x3b0 fs/namespace.c:3540
__x64_sys_mount+0xbf/0xd0 fs/namespace.c:3540
x64_sys_call+0x49d/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:166
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
Freed by task 60:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track+0x4b/0x70 mm/kasan/common.c:45
kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370
____kasan_slab_free+0x126/0x160 mm/kasan/common.c:365
__kasan_slab_free+0x11/0x20 mm/kasan/common.c:373
kasan_slab_free include/linux/kasan.h:193 [inline]
slab_free_hook mm/slub.c:1723 [inline]
slab_free_freelist_hook+0xbd/0x190 mm/slub.c:1749
slab_free mm/slub.c:3521 [inline]
kfree+0xcc/0x270 mm/slub.c:4583
destroy_super_work+0x40/0x50 fs/super.c:165
process_one_work+0x6bb/0xc10 kernel/workqueue.c:2325
worker_thread+0xad5/0x12a0 kernel/workqueue.c:2472
kthread+0x421/0x510 kernel/kthread.c:337
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
Last potentially related work creation:
kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38
__kasan_record_aux_stack+0xd3/0xf0 mm/kasan/generic.c:348
kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358
insert_work+0x56/0x320 kernel/workqueue.c:1373
__queue_work+0x92a/0xcd0 kernel/workqueue.c:1539
queue_work_on+0x105/0x170 kernel/workqueue.c:1566
queue_work include/linux/workqueue.h:510 [inline]
schedule_work include/linux/workqueue.h:571 [inline]
destroy_super_rcu+0xd1/0xe0 fs/super.c:172
rcu_do_batch+0x57a/0xc10 kernel/rcu/tree.c:2523
rcu_core+0x517/0x1020 kernel/rcu/tree.c:2763
rcu_core_si+0x9/0x10 kernel/rcu/tree.c:2776
handle_softirqs+0x25e/0x5c0 kernel/softirq.c:565
__do_softirq kernel/softirq.c:603 [inline]
invoke_softirq kernel/softirq.c:425 [inline]
__irq_exit_rcu+0x52/0xf0 kernel/softirq.c:652
irq_exit_rcu+0x9/0x10 kernel/softirq.c:664
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
sysvec_apic_timer_interrupt+0xa9/0xc0 arch/x86/kernel/apic/apic.c:1108
asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:676
Second to last potentially related work creation:
kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38
__kasan_record_aux_stack+0xd3/0xf0 mm/kasan/generic.c:348
kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358
__call_rcu_common kernel/rcu/tree.c:3007 [inline]
call_rcu+0x123/0x10b0 kernel/rcu/tree.c:3125
__put_super+0x26d/0x2e0 fs/super.c:299
put_super fs/super.c:313 [inline]
deactivate_locked_super+0xe1/0x110 fs/super.c:346
deactivate_super+0xbe/0xf0 fs/super.c:366
cleanup_mnt+0x45c/0x510 fs/namespace.c:1143
__cleanup_mnt+0x19/0x20 fs/namespace.c:1150
task_work_run+0x129/0x190 kernel/task_work.c:188
tracehook_notify_resume include/linux/tracehook.h:189 [inline]
exit_to_user_mode_loop+0xc4/0xe0 kernel/entry/common.c:181
exit_to_user_mode_prepare+0x5a/0xa0 kernel/entry/common.c:214
__syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
syscall_exit_to_user_mode+0x26/0x160 kernel/entry/common.c:307
do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x66/0xd0
The buggy address belongs to the object at ffff8881199aa000
which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 112 bytes inside of
2048-byte region [ffff8881199aa000, ffff8881199aa800)
The buggy address belongs to the page:
page:ffffea0004666a00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1199a8
head:ffffea0004666a00 order:3 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head|zone=1)
raw: 4000000000010200 dead000000000100 dead000000000122 ffff888100043200
raw: 0000000000000000 0000000000080008 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 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 1922, ts 125540494826, free_ts 125509815104
set_page_owner include/linux/page_owner.h:33 [inline]
post_alloc_hook+0x1a3/0x1b0 mm/page_alloc.c:2605
prep_new_page+0x1b/0x110 mm/page_alloc.c:2611
get_page_from_freelist+0x3550/0x35d0 mm/page_alloc.c:4485
__alloc_pages+0x27e/0x8f0 mm/page_alloc.c:5780
allocate_slab mm/slub.c:1932 [inline]
new_slab+0x9a/0x4e0 mm/slub.c:1995
___slab_alloc+0x39e/0x830 mm/slub.c:3028
__slab_alloc+0x4a/0x90 mm/slub.c:3115
slab_alloc_node mm/slub.c:3206 [inline]
slab_alloc mm/slub.c:3250 [inline]
__kmalloc_track_caller+0x171/0x2c0 mm/slub.c:4949
kmemdup+0x24/0x50 mm/util.c:132
neigh_sysctl_register+0xb0/0x530 net/core/neighbour.c:3648
addrconf_sysctl_register+0xae/0x1a0 net/ipv6/addrconf.c:7182
ipv6_add_dev+0xc84/0x1140 net/ipv6/addrconf.c:454
addrconf_notify+0x593/0xdd0 net/ipv6/addrconf.c:3599
notifier_call_chain kernel/notifier.c:83 [inline]
raw_notifier_call_chain+0x8c/0xf0 kernel/notifier.c:391
call_netdevice_notifiers_info net/core/dev.c:2026 [inline]
call_netdevice_notifiers_extack net/core/dev.c:2038 [inline]
call_netdevice_notifiers+0x145/0x1b0 net/core/dev.c:2052
register_netdevice+0x1035/0x1390 net/core/dev.c:10404
page last free stack trace:
reset_page_owner include/linux/page_owner.h:26 [inline]
free_pages_prepare mm/page_alloc.c:1472 [inline]
free_pcp_prepare mm/page_alloc.c:1544 [inline]
free_unref_page_prepare+0x7c8/0x7d0 mm/page_alloc.c:3534
free_unref_page+0xe8/0x750 mm/page_alloc.c:3616
free_the_page mm/page_alloc.c:805 [inline]
__free_pages+0x61/0xf0 mm/page_alloc.c:5856
__free_slab+0xec/0x1d0 mm/slub.c:2020
free_slab mm/slub.c:2035 [inline]
discard_slab mm/slub.c:2041 [inline]
__unfreeze_partials+0x165/0x1a0 mm/slub.c:2527
put_cpu_partial+0xc4/0x120 mm/slub.c:2607
__slab_free+0x1c8/0x290 mm/slub.c:3390
do_slab_free mm/slub.c:3509 [inline]
___cache_free+0x109/0x120 mm/slub.c:3530
qlink_free+0x4d/0x90 mm/kasan/quarantine.c:157
qlist_free_all+0x44/0xb0 mm/kasan/quarantine.c:176
kasan_quarantine_reduce+0x15a/0x180 mm/kasan/quarantine.c:283
__kasan_slab_alloc+0x2f/0xe0 mm/kasan/common.c:443
kasan_slab_alloc include/linux/kasan.h:217 [inline]
slab_post_alloc_hook+0x53/0x2c0 mm/slab.h:550
slab_alloc_node mm/slub.c:3240 [inline]
slab_alloc mm/slub.c:3250 [inline]
__kmalloc_track_caller+0x11d/0x2c0 mm/slub.c:4949
kvasprintf+0xd6/0x180 lib/kasprintf.c:25
kvasprintf_const+0x5e/0x190 lib/kasprintf.c:49
Memory state around the buggy address:
ffff8881199a9f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff8881199a9f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8881199aa000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8881199aa080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8881199aa100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================