==================================================================
BUG: KASAN: use-after-free in wb_get include/linux/backing-dev-defs.h:242 [inline]
BUG: KASAN: use-after-free in locked_inode_to_wb_and_lock_list+0x68/0x2f0 fs/fs-writeback.c:303
Read of size 8 at addr ffff88811cbc1060 by task syz-executor.4/23659
CPU: 1 PID: 23659 Comm: syz-executor.4 Not tainted 5.10.194-syzkaller-00508-ga27512601c2d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack_lvl+0x1e2/0x24b lib/dump_stack.c:118
print_address_description+0x81/0x3b0 mm/kasan/report.c:248
__kasan_report mm/kasan/report.c:435 [inline]
kasan_report+0x179/0x1c0 mm/kasan/report.c:452
__asan_report_load8_noabort+0x14/0x20 mm/kasan/report_generic.c:309
wb_get include/linux/backing-dev-defs.h:242 [inline]
locked_inode_to_wb_and_lock_list+0x68/0x2f0 fs/fs-writeback.c:303
__mark_inode_dirty+0x400/0x9d0 fs/fs-writeback.c:2311
inc_valid_node_count+0x571/0x9d0 fs/f2fs/f2fs.h:2606
f2fs_new_node_page+0x241/0x990 fs/f2fs/node.c:1292
f2fs_get_dnode_of_data+0x6f0/0x1fb0 fs/f2fs/node.c:809
f2fs_reserve_block+0x53/0x310 fs/f2fs/data.c:1173
f2fs_get_new_data_page+0x18f/0x8f0 fs/f2fs/data.c:1350
f2fs_add_regular_entry+0x4c8/0xb10 fs/f2fs/dir.c:752
f2fs_add_dentry+0x207/0x340 fs/f2fs/dir.c:821
f2fs_do_add_link+0x29b/0x400 fs/f2fs/dir.c:860
f2fs_add_link fs/f2fs/f2fs.h:3516 [inline]
f2fs_create+0xd17/0x1900 fs/f2fs/namei.c:372
lookup_open fs/namei.c:3253 [inline]
open_last_lookups fs/namei.c:3323 [inline]
path_openat+0x1377/0x3000 fs/namei.c:3512
do_filp_open+0x21c/0x460 fs/namei.c:3542
do_sys_openat2+0x13f/0x6f0 fs/open.c:1217
do_sys_open fs/open.c:1233 [inline]
__do_sys_creat fs/open.c:1307 [inline]
__se_sys_creat fs/open.c:1301 [inline]
__x64_sys_creat+0x11f/0x160 fs/open.c:1301
do_syscall_64+0x34/0x70
entry_SYSCALL_64_after_hwframe+0x61/0xc6
RIP: 0033:0x7f982b0a2ae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f9829e250c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 00007f982b1c1f80 RCX: 00007f982b0a2ae9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000400
RBP: 00007f982b0ee47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f982b1c1f80 R15: 00007ffc2a65b448
Allocated by task 22972:
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:430 [inline]
____kasan_kmalloc+0xdb/0x110 mm/kasan/common.c:509
__kasan_kmalloc+0x9/0x10 mm/kasan/common.c:518
kasan_kmalloc include/linux/kasan.h:254 [inline]
__kmalloc+0x1aa/0x330 mm/slub.c:4033
kmalloc include/linux/slab.h:557 [inline]
f2fs_kmalloc fs/f2fs/f2fs.h:3348 [inline]
f2fs_fill_super+0x3733/0x7e30 fs/f2fs/super.c:4144
mount_bdev+0x262/0x370 fs/super.c:1429
f2fs_mount+0x34/0x40 fs/f2fs/super.c:4550
legacy_get_tree+0xf1/0x190 fs/fs_context.c:593
vfs_get_tree+0x88/0x290 fs/super.c:1559
do_new_mount+0x28b/0xad0 fs/namespace.c:2899
path_mount+0x56f/0xcb0 fs/namespace.c:3229
do_mount fs/namespace.c:3242 [inline]
__do_sys_mount fs/namespace.c:3450 [inline]
__se_sys_mount+0x2c4/0x3b0 fs/namespace.c:3427
__x64_sys_mount+0xbf/0xd0 fs/namespace.c:3427
do_syscall_64+0x34/0x70
entry_SYSCALL_64_after_hwframe+0x61/0xc6
Freed by task 458:
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+0x121/0x160 mm/kasan/common.c:362
__kasan_slab_free+0x11/0x20 mm/kasan/common.c:370
kasan_slab_free include/linux/kasan.h:220 [inline]
slab_free_hook mm/slub.c:1595 [inline]
slab_free_freelist_hook+0xc0/0x190 mm/slub.c:1621
slab_free mm/slub.c:3203 [inline]
kfree+0xc3/0x270 mm/slub.c:4191
kvfree+0x35/0x40 mm/util.c:647
f2fs_put_super+0xa3b/0xc10 fs/f2fs/super.c:1650
generic_shutdown_super+0x14f/0x2d0 fs/super.c:465
kill_block_super+0x7e/0xe0 fs/super.c:1456
kill_f2fs_super+0x2f9/0x3c0 fs/f2fs/super.c:4582
deactivate_locked_super+0xad/0x110 fs/super.c:335
deactivate_super+0xbe/0xf0 fs/super.c:366
cleanup_mnt+0x45c/0x510 fs/namespace.c:1118
__cleanup_mnt+0x19/0x20 fs/namespace.c:1125
task_work_run+0x129/0x190 kernel/task_work.c:164
tracehook_notify_resume include/linux/tracehook.h:188 [inline]
exit_to_user_mode_loop+0xbf/0xd0 kernel/entry/common.c:172
exit_to_user_mode_prepare kernel/entry/common.c:199 [inline]
syscall_exit_to_user_mode+0xc5/0x1d0 kernel/entry/common.c:274
do_syscall_64+0x40/0x70 arch/x86/entry/common.c:56
entry_SYSCALL_64_after_hwframe+0x61/0xc6
Last potentially related work creation:
kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38
__kasan_record_aux_stack+0xd3/0x100 mm/kasan/generic.c:348
kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358
insert_work+0x56/0x310 kernel/workqueue.c:1352
__queue_work+0x970/0xd10 kernel/workqueue.c:1518
queue_work_on+0x105/0x160 kernel/workqueue.c:1545
queue_work include/linux/workqueue.h:514 [inline]
schedule_work include/linux/workqueue.h:575 [inline]
destroy_super_rcu+0xd1/0xe0 fs/super.c:172
rcu_do_batch+0x597/0xc40 kernel/rcu/tree.c:2493
rcu_core+0x5ad/0xe40 kernel/rcu/tree.c:2734
rcu_core_si+0x9/0x10 kernel/rcu/tree.c:2747
__do_softirq+0x268/0x5bb kernel/softirq.c:309
Second to last potentially related work creation:
kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38
__kasan_record_aux_stack+0xd3/0x100 mm/kasan/generic.c:348
kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358
__call_rcu kernel/rcu/tree.c:2975 [inline]
call_rcu+0x135/0x11f0 kernel/rcu/tree.c:3049
__put_super+0x25c/0x2b0 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:1118
__cleanup_mnt+0x19/0x20 fs/namespace.c:1125
task_work_run+0x129/0x190 kernel/task_work.c:164
tracehook_notify_resume include/linux/tracehook.h:188 [inline]
exit_to_user_mode_loop+0xbf/0xd0 kernel/entry/common.c:172
exit_to_user_mode_prepare kernel/entry/common.c:199 [inline]
syscall_exit_to_user_mode+0xc5/0x1d0 kernel/entry/common.c:274
do_syscall_64+0x40/0x70 arch/x86/entry/common.c:56
entry_SYSCALL_64_after_hwframe+0x61/0xc6
The buggy address belongs to the object at ffff88811cbc1000
which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 96 bytes inside of
2048-byte region [ffff88811cbc1000, ffff88811cbc1800)
The buggy address belongs to the page:
page:ffffea000472f000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11cbc0
head:ffffea000472f000 order:3 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head)
raw: 4000000000010200 dead000000000100 dead000000000122 ffff888100042d80
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 455, ts 185656126329, free_ts 185641356632
set_page_owner include/linux/page_owner.h:35 [inline]
post_alloc_hook mm/page_alloc.c:2456 [inline]
prep_new_page+0x166/0x180 mm/page_alloc.c:2462
get_page_from_freelist+0x2d8c/0x2f30 mm/page_alloc.c:4254
__alloc_pages_nodemask+0x435/0xaf0 mm/page_alloc.c:5346
allocate_slab mm/slub.c:1808 [inline]
new_slab+0x80/0x400 mm/slub.c:1869
new_slab_objects mm/slub.c:2627 [inline]
___slab_alloc+0x302/0x4b0 mm/slub.c:2791
__slab_alloc+0x63/0xa0 mm/slub.c:2831
slab_alloc_node mm/slub.c:2913 [inline]
slab_alloc mm/slub.c:2955 [inline]
__kmalloc+0x204/0x330 mm/slub.c:4029
__kmalloc_node include/linux/slab.h:418 [inline]
kmalloc_node include/linux/slab.h:575 [inline]
kvmalloc_node+0x82/0x130 mm/util.c:612
kvmalloc include/linux/mm.h:822 [inline]
xt_alloc_table_info+0x42/0xb0 net/netfilter/x_tables.c:1172
do_replace net/ipv6/netfilter/ip6_tables.c:1141 [inline]
do_ip6t_set_ctl+0xacc/0x3f50 net/ipv6/netfilter/ip6_tables.c:1638
nf_setsockopt+0x274/0x2a0 net/netfilter/nf_sockopt.c:101
ipv6_setsockopt+0x2789/0x3ea0 net/ipv6/ipv6_sockglue.c:1011
tcp_setsockopt+0x22d/0x3660 net/ipv4/tcp.c:3463
sock_common_setsockopt+0xa2/0xc0 net/core/sock.c:3302
__sys_setsockopt+0x502/0x870 net/socket.c:2127
__do_sys_setsockopt net/socket.c:2138 [inline]
__se_sys_setsockopt net/socket.c:2135 [inline]
__x64_sys_setsockopt+0xbf/0xd0 net/socket.c:2135
page last free stack trace:
reset_page_owner include/linux/page_owner.h:28 [inline]
free_pages_prepare mm/page_alloc.c:1349 [inline]
__free_pages_ok+0x82c/0x850 mm/page_alloc.c:1629
free_the_page+0x76/0x370 mm/page_alloc.c:5407
__free_pages+0x67/0xc0 mm/page_alloc.c:5416
__free_slab+0xcf/0x190 mm/slub.c:1894
free_slab mm/slub.c:1909 [inline]
discard_slab mm/slub.c:1915 [inline]
unfreeze_partials+0x15e/0x190 mm/slub.c:2410
put_cpu_partial+0xbf/0x180 mm/slub.c:2446
__slab_free+0x2c8/0x3a0 mm/slub.c:3095
do_slab_free mm/slub.c:3191 [inline]
___cache_free+0x111/0x130 mm/slub.c:3210
qlink_free+0x50/0x90 mm/kasan/quarantine.c:157
qlist_free_all+0x47/0xb0 mm/kasan/quarantine.c:176
kasan_quarantine_reduce+0x15a/0x170 mm/kasan/quarantine.c:283
__kasan_slab_alloc+0x2f/0xe0 mm/kasan/common.c:440
kasan_slab_alloc include/linux/kasan.h:244 [inline]
slab_post_alloc_hook+0x61/0x2f0 mm/slab.h:583
slab_alloc_node mm/slub.c:2947 [inline]
slab_alloc mm/slub.c:2955 [inline]
kmem_cache_alloc+0x168/0x2e0 mm/slub.c:2960
getname_flags+0xba/0x520 fs/namei.c:141
getname+0x19/0x20 fs/namei.c:212
Memory state around the buggy address:
ffff88811cbc0f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88811cbc0f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88811cbc1000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88811cbc1080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88811cbc1100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
general protection fault, probably for non-canonical address 0xffff110313cc1288: 0000 [#1] PREEMPT SMP KASAN
KASAN: maybe wild-memory-access in range [0xfff8a8189e609440-0xfff8a8189e609447]
CPU: 1 PID: 23659 Comm: syz-executor.4 Tainted: G B 5.10.194-syzkaller-00508-ga27512601c2d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
RIP: 0010:percpu_ref_get_many include/linux/percpu-refcount.h:205 [inline]
RIP: 0010:percpu_ref_get include/linux/percpu-refcount.h:222 [inline]
RIP: 0010:wb_get include/linux/backing-dev-defs.h:243 [inline]
RIP: 0010:locked_inode_to_wb_and_lock_list+0xc4/0x2f0 fs/fs-writeback.c:303
Code: 89 df e8 5f ad eb ff 48 8b 1b 48 89 de 48 83 e6 03 31 ff e8 0e 5d ae ff 48 89 d8 48 83 e0 03 0f 85 8e 00 00 00 e8 bc 58 ae ff <65> 48 ff 03 e8 c3 67 9b ff eb 05 e8 ac 58 ae ff 48 8b 7d d0 e8 53
RSP: 0018:ffffc9000751ee38 EFLAGS: 00010287
RAX: ffffffff81bc4774 RBX: ffff88811cbc1288 RCX: 0000000000040000
RDX: ffffc90004124000 RSI: 000000000003deed RDI: 000000000003deee
RBP: ffffc9000751ee70 R08: ffffffff81bc4762 R09: 0000000000000003
R10: fffffbfff0e10048 R11: dffffc0000000001 R12: ffff88811cbc1060
R13: dffffc0000000000 R14: 1ffff1102397820c R15: ffff88816bf9ee80
FS: 00007f9829e256c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020404030 CR3: 000000016585a000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__mark_inode_dirty+0x400/0x9d0 fs/fs-writeback.c:2311
inc_valid_node_count+0x571/0x9d0 fs/f2fs/f2fs.h:2606
f2fs_new_node_page+0x241/0x990 fs/f2fs/node.c:1292
f2fs_get_dnode_of_data+0x6f0/0x1fb0 fs/f2fs/node.c:809
f2fs_reserve_block+0x53/0x310 fs/f2fs/data.c:1173
f2fs_get_new_data_page+0x18f/0x8f0 fs/f2fs/data.c:1350
f2fs_add_regular_entry+0x4c8/0xb10 fs/f2fs/dir.c:752
f2fs_add_dentry+0x207/0x340 fs/f2fs/dir.c:821
f2fs_do_add_link+0x29b/0x400 fs/f2fs/dir.c:860
f2fs_add_link fs/f2fs/f2fs.h:3516 [inline]
f2fs_create+0xd17/0x1900 fs/f2fs/namei.c:372
lookup_open fs/namei.c:3253 [inline]
open_last_lookups fs/namei.c:3323 [inline]
path_openat+0x1377/0x3000 fs/namei.c:3512
do_filp_open+0x21c/0x460 fs/namei.c:3542
do_sys_openat2+0x13f/0x6f0 fs/open.c:1217
do_sys_open fs/open.c:1233 [inline]
__do_sys_creat fs/open.c:1307 [inline]
__se_sys_creat fs/open.c:1301 [inline]
__x64_sys_creat+0x11f/0x160 fs/open.c:1301
do_syscall_64+0x34/0x70
entry_SYSCALL_64_after_hwframe+0x61/0xc6
RIP: 0033:0x7f982b0a2ae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f9829e250c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 00007f982b1c1f80 RCX: 00007f982b0a2ae9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000400
RBP: 00007f982b0ee47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f982b1c1f80 R15: 00007ffc2a65b448
Modules linked in:
---[ end trace ffe5a370f289d7de ]---
RIP: 0010:percpu_ref_get_many include/linux/percpu-refcount.h:205 [inline]
RIP: 0010:percpu_ref_get include/linux/percpu-refcount.h:222 [inline]
RIP: 0010:wb_get include/linux/backing-dev-defs.h:243 [inline]
RIP: 0010:locked_inode_to_wb_and_lock_list+0xc4/0x2f0 fs/fs-writeback.c:303
Code: 89 df e8 5f ad eb ff 48 8b 1b 48 89 de 48 83 e6 03 31 ff e8 0e 5d ae ff 48 89 d8 48 83 e0 03 0f 85 8e 00 00 00 e8 bc 58 ae ff <65> 48 ff 03 e8 c3 67 9b ff eb 05 e8 ac 58 ae ff 48 8b 7d d0 e8 53
RSP: 0018:ffffc9000751ee38 EFLAGS: 00010287
RAX: ffffffff81bc4774 RBX: ffff88811cbc1288 RCX: 0000000000040000
RDX: ffffc90004124000 RSI: 000000000003deed RDI: 000000000003deee
RBP: ffffc9000751ee70 R08: ffffffff81bc4762 R09: 0000000000000003
R10: fffffbfff0e10048 R11: dffffc0000000001 R12: ffff88811cbc1060
R13: dffffc0000000000 R14: 1ffff1102397820c R15: ffff88816bf9ee80
FS: 00007f9829e256c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020404030 CR3: 000000016585a000 CR4: 00000000003526a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 89 df mov %ebx,%edi
2: e8 5f ad eb ff call 0xffebad66
7: 48 8b 1b mov (%rbx),%rbx
a: 48 89 de mov %rbx,%rsi
d: 48 83 e6 03 and $0x3,%rsi
11: 31 ff xor %edi,%edi
13: e8 0e 5d ae ff call 0xffae5d26
18: 48 89 d8 mov %rbx,%rax
1b: 48 83 e0 03 and $0x3,%rax
1f: 0f 85 8e 00 00 00 jne 0xb3
25: e8 bc 58 ae ff call 0xffae58e6
* 2a: 65 48 ff 03 incq %gs:(%rbx) <-- trapping instruction
2e: e8 c3 67 9b ff call 0xff9b67f6
33: eb 05 jmp 0x3a
35: e8 ac 58 ae ff call 0xffae58e6
3a: 48 8b 7d d0 mov -0x30(%rbp),%rdi
3e: e8 .byte 0xe8
3f: 53 push %rbx