==================================================================
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:1317 [inline]
BUG: KASAN: use-after-free in down_read_trylock+0x7c/0x300 kernel/locking/rwsem.c:1584
Read of size 8 at addr ffff88811530d070 by task kworker/u4:5/24280
CPU: 0 PID: 24280 Comm: kworker/u4:5 Not tainted 5.15.106-syzkaller-00266-g36f4f6fb72d5 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
Workqueue: writeback wb_workfn (flush-7:5)
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x151/0x1b7 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:1317 [inline]
down_read_trylock+0x7c/0x300 kernel/locking/rwsem.c:1584
trylock_super+0x1f/0xf0 fs/super.c:418
__writeback_inodes_wb+0x101/0x3f0 fs/fs-writeback.c:1967
wb_writeback+0x3cd/0x9e0 fs/fs-writeback.c:2081
wb_check_background_flush fs/fs-writeback.c:2147 [inline]
wb_do_writeback fs/fs-writeback.c:2235 [inline]
wb_workfn+0xc12/0x1110 fs/fs-writeback.c:2263
process_one_work+0x6bb/0xc10 kernel/workqueue.c:2313
worker_thread+0xad5/0x12a0 kernel/workqueue.c:2460
kthread+0x421/0x510 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
</TASK>
Allocated by task 31644:
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+0x115/0x210 mm/slub.c:3265
kmalloc include/linux/slab.h:608 [inline]
kzalloc include/linux/slab.h:738 [inline]
alloc_super+0x5d/0x7d0 fs/super.c:203
sget+0x1e5/0x4c0 fs/super.c:624
mount_bdev+0xe6/0x3b0 fs/super.c:1351
f2fs_mount+0x34/0x40 fs/f2fs/super.c:4555
legacy_get_tree+0xf1/0x190 fs/fs_context.c:610
vfs_get_tree+0x88/0x290 fs/super.c:1508
do_new_mount+0x28b/0xac0 fs/namespace.c:2994
path_mount+0x671/0x1070 fs/namespace.c:3324
do_mount fs/namespace.c:3337 [inline]
__do_sys_mount fs/namespace.c:3545 [inline]
__se_sys_mount+0x2c4/0x3b0 fs/namespace.c:3522
__x64_sys_mount+0xbf/0xd0 fs/namespace.c:3522
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
Freed by task 567:
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:3517 [inline]
kfree+0xc8/0x220 mm/slub.c:4577
destroy_super_work+0x40/0x50 fs/super.c:165
process_one_work+0x6bb/0xc10 kernel/workqueue.c:2313
worker_thread+0xad5/0x12a0 kernel/workqueue.c:2460
kthread+0x421/0x510 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
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:1369
__queue_work+0x923/0xcd0 kernel/workqueue.c:1535
queue_work_on+0x105/0x170 kernel/workqueue.c:1562
queue_work include/linux/workqueue.h:507 [inline]
schedule_work include/linux/workqueue.h:568 [inline]
destroy_super_rcu+0xd1/0xe0 fs/super.c:172
rcu_do_batch+0x57a/0xc10 kernel/rcu/tree.c:2509
rcu_core+0x517/0x1020 kernel/rcu/tree.c:2749
rcu_core_si+0x9/0x10 kernel/rcu/tree.c:2762
__do_softirq+0x26d/0x5bf kernel/softirq.c:565
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 kernel/rcu/tree.c:2993 [inline]
call_rcu+0x133/0x12a0 kernel/rcu/tree.c:3073
__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:164
tracehook_notify_resume include/linux/tracehook.h:189 [inline]
exit_to_user_mode_loop+0xc4/0xe0 kernel/entry/common.c:175
exit_to_user_mode_prepare+0x5a/0xa0 kernel/entry/common.c:208
__syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
syscall_exit_to_user_mode+0x26/0x160 kernel/entry/common.c:301
do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x61/0xcb
The buggy address belongs to the object at ffff88811530d000
which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 112 bytes inside of
2048-byte region [ffff88811530d000, ffff88811530d800)
The buggy address belongs to the page:
page:ffffea000454c200 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x115308
head:ffffea000454c200 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 0x1d2a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 22885, ts 798221210423, free_ts 798199166368
set_page_owner include/linux/page_owner.h:33 [inline]
post_alloc_hook+0x1a3/0x1b0 mm/page_alloc.c:2595
prep_new_page mm/page_alloc.c:2601 [inline]
get_page_from_freelist+0x2eab/0x2f80 mm/page_alloc.c:4394
__alloc_pages+0x386/0x7b0 mm/page_alloc.c:5679
allocate_slab mm/slub.c:1930 [inline]
new_slab+0x92/0x490 mm/slub.c:1993
___slab_alloc+0x39e/0x830 mm/slub.c:3026
__slab_alloc+0x4a/0x90 mm/slub.c:3113
slab_alloc_node mm/slub.c:3204 [inline]
slab_alloc mm/slub.c:3246 [inline]
__kmalloc_track_caller+0x16c/0x260 mm/slub.c:4943
kmalloc_reserve net/core/skbuff.c:357 [inline]
pskb_expand_head+0x113/0x1240 net/core/skbuff.c:1727
netlink_trim+0x19b/0x230 net/netlink/af_netlink.c:1312
netlink_broadcast_filtered+0x66/0x1220 net/netlink/af_netlink.c:1517
netlink_broadcast net/netlink/af_netlink.c:1562 [inline]
nlmsg_multicast include/net/netlink.h:1033 [inline]
nlmsg_notify+0x101/0x1c0 net/netlink/af_netlink.c:2576
rtnl_notify net/core/rtnetlink.c:730 [inline]
rtmsg_ifinfo_send net/core/rtnetlink.c:3848 [inline]
rtmsg_ifinfo_event net/core/rtnetlink.c:3863 [inline]
rtmsg_ifinfo+0xe7/0x120 net/core/rtnetlink.c:3869
__dev_notify_flags+0xdd/0x610 net/core/dev.c:8824
rtnl_configure_link+0x221/0x320
veth_newlink+0x808/0xe30 drivers/net/veth.c:1714
__rtnl_newlink net/core/rtnetlink.c:3462 [inline]
rtnl_newlink+0x146e/0x2040 net/core/rtnetlink.c:3510
page last free stack trace:
reset_page_owner include/linux/page_owner.h:26 [inline]
free_pages_prepare mm/page_alloc.c:1466 [inline]
free_pcp_prepare mm/page_alloc.c:1538 [inline]
free_unref_page_prepare+0x7c8/0x7d0 mm/page_alloc.c:3502
free_unref_page+0xbd/0x5a0 mm/page_alloc.c:3583
free_the_page mm/page_alloc.c:800 [inline]
__free_pages+0x61/0xf0 mm/page_alloc.c:5755
__free_slab+0xec/0x1d0 mm/slub.c:2018
free_slab mm/slub.c:2033 [inline]
discard_slab mm/slub.c:2039 [inline]
__unfreeze_partials+0x165/0x1a0 mm/slub.c:2525
put_cpu_partial+0xc4/0x120 mm/slub.c:2605
__slab_free+0x1c8/0x290 mm/slub.c:3386
do_slab_free mm/slub.c:3505 [inline]
___cache_free+0x109/0x120 mm/slub.c:3524
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:3238 [inline]
slab_alloc mm/slub.c:3246 [inline]
kmem_cache_alloc+0xf5/0x200 mm/slub.c:3251
add_free_nid+0xe9/0x6d0 fs/f2fs/node.c:2288
scan_nat_page fs/f2fs/node.c:2387 [inline]
__f2fs_build_free_nids fs/f2fs/node.c:2493 [inline]
f2fs_build_free_nids+0xc75/0x1180 fs/f2fs/node.c:2531
Memory state around the buggy address:
ffff88811530cf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88811530cf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88811530d000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88811530d080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88811530d100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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