==================================================================
BUG: KASAN: slab-out-of-bounds in dentry_revalidate+0x13e/0x350 fs/incfs/vfs.c:1554
Read of size 8 at addr ffff88812b9ea020 by task syz-executor/25004
CPU: 0 PID: 25004 Comm: syz-executor Tainted: G W 5.10.237-syzkaller-00309-g7e2543346ff7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
__dump_stack+0x21/0x24 lib/dump_stack.c:77
dump_stack_lvl+0x169/0x1d8 lib/dump_stack.c:118
print_address_description+0x7f/0x2c0 mm/kasan/report.c:248
__kasan_report mm/kasan/report.c:435 [inline]
kasan_report+0xe2/0x130 mm/kasan/report.c:452
__asan_report_load8_noabort+0x14/0x20 mm/kasan/report_generic.c:309
dentry_revalidate+0x13e/0x350 fs/incfs/vfs.c:1554
d_revalidate fs/namei.c:780 [inline]
lookup_fast+0x3f1/0x700 fs/namei.c:1589
walk_component+0x80/0x460 fs/namei.c:1948
lookup_last fs/namei.c:2403 [inline]
path_lookupat+0x180/0x490 fs/namei.c:2427
filename_lookup+0x1d5/0x600 fs/namei.c:2460
user_path_at_empty+0x43/0x50 fs/namei.c:2740
user_path_at include/linux/namei.h:60 [inline]
vfs_statx+0xff/0x520 fs/stat.c:193
vfs_fstatat fs/stat.c:215 [inline]
__do_sys_newfstatat fs/stat.c:383 [inline]
__se_sys_newfstatat+0xc6/0x340 fs/stat.c:377
__x64_sys_newfstatat+0x9b/0xb0 fs/stat.c:377
do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f766158f17a
Code: 48 89 f2 b9 00 01 00 00 48 89 fe bf 9c ff ff ff e9 0b 00 00 00 66 2e 0f 1f 84 00 00 00 00 00 90 41 89 ca b8 06 01 00 00 0f 05 <3d> 00 f0 ff ff 77 07 31 c0 c3 0f 1f 40 00 48 c7 c2 a8 ff ff ff f7
RSP: 002b:00007fffb5711888 EFLAGS: 00000286 ORIG_RAX: 0000000000000106
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f766158f17a
RDX: 00007fffb57118b0 RSI: 00007fffb5711940 RDI: 00000000ffffff9c
RBP: 00007fffb5711940 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000286 R12: 00007fffb5712a30
R13: 00007f766161289d R14: 000055556624d4a8 R15: 00007fffb5713b00
Allocated by task 4662:
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_slab_alloc+0xbd/0xf0 mm/kasan/common.c:463
kasan_slab_alloc include/linux/kasan.h:244 [inline]
slab_post_alloc_hook+0x5d/0x2f0 mm/slab.h:583
slab_alloc_node mm/slub.c:2947 [inline]
slab_alloc mm/slub.c:2955 [inline]
kmem_cache_alloc+0x165/0x2e0 mm/slub.c:2960
f2fs_kmem_cache_alloc fs/f2fs/f2fs.h:2779 [inline]
f2fs_alloc_inode+0x26/0x410 fs/f2fs/super.c:1373
alloc_inode fs/inode.c:233 [inline]
iget_locked+0x146/0x7d0 fs/inode.c:1275
f2fs_iget+0x55/0x4dc0 fs/f2fs/inode.c:498
f2fs_fill_super+0x468e/0x6c70 fs/f2fs/super.c:4309
mount_bdev+0x28b/0x3a0 fs/super.c:1442
f2fs_mount+0x34/0x40 fs/f2fs/super.c:4548
legacy_get_tree+0xed/0x190 fs/fs_context.c:593
vfs_get_tree+0x89/0x260 fs/super.c:1572
do_new_mount+0x25a/0xa20 fs/namespace.c:2918
path_mount+0x572/0xc80 fs/namespace.c:3248
do_mount fs/namespace.c:3261 [inline]
__do_sys_mount fs/namespace.c:3469 [inline]
__se_sys_mount+0x318/0x380 fs/namespace.c:3446
__x64_sys_mount+0xbf/0xd0 fs/namespace.c:3446
do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x61/0xcb
Last potentially related work creation:
kasan_save_stack+0x3a/0x60 mm/kasan/common.c:38
__kasan_record_aux_stack+0xd2/0x100 mm/kasan/generic.c:348
kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358
__call_rcu kernel/rcu/tree.c:2976 [inline]
call_rcu+0x105/0x1040 kernel/rcu/tree.c:3050
destroy_inode fs/inode.c:288 [inline]
evict+0x857/0x910 fs/inode.c:629
dispose_list fs/inode.c:647 [inline]
evict_inodes+0x5d4/0x640 fs/inode.c:701
generic_shutdown_super+0x96/0x320 fs/super.c:454
kill_block_super+0x7f/0xf0 fs/super.c:1469
kill_f2fs_super+0x2e7/0x390 fs/f2fs/super.c:4580
deactivate_locked_super+0xa0/0x100 fs/super.c:335
deactivate_super+0xaf/0xe0 fs/super.c:366
cleanup_mnt+0x446/0x500 fs/namespace.c:1118
__cleanup_mnt+0x19/0x20 fs/namespace.c:1125
task_work_run+0x127/0x190 kernel/task_work.c:189
tracehook_notify_resume include/linux/tracehook.h:188 [inline]
exit_to_user_mode_loop+0xcb/0xe0 kernel/entry/common.c:172
exit_to_user_mode_prepare kernel/entry/common.c:199 [inline]
syscall_exit_to_user_mode+0x68/0x90 kernel/entry/common.c:274
do_syscall_64+0x3d/0x40 arch/x86/entry/common.c:56
entry_SYSCALL_64_after_hwframe+0x61/0xcb
Second to last potentially related work creation:
kasan_save_stack+0x3a/0x60 mm/kasan/common.c:38
__kasan_record_aux_stack+0xd2/0x100 mm/kasan/generic.c:348
kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358
__call_rcu kernel/rcu/tree.c:2976 [inline]
call_rcu+0x105/0x1040 kernel/rcu/tree.c:3050
destroy_inode fs/inode.c:288 [inline]
evict+0x857/0x910 fs/inode.c:629
iput_final fs/inode.c:1736 [inline]
iput+0x638/0x7c0 fs/inode.c:1762
f2fs_put_super+0x68a/0xc00 fs/f2fs/super.c:1614
generic_shutdown_super+0x149/0x320 fs/super.c:465
kill_block_super+0x7f/0xf0 fs/super.c:1469
kill_f2fs_super+0x2e7/0x390 fs/f2fs/super.c:4580
deactivate_locked_super+0xa0/0x100 fs/super.c:335
deactivate_super+0xaf/0xe0 fs/super.c:366
cleanup_mnt+0x446/0x500 fs/namespace.c:1118
__cleanup_mnt+0x19/0x20 fs/namespace.c:1125
task_work_run+0x127/0x190 kernel/task_work.c:189
tracehook_notify_resume include/linux/tracehook.h:188 [inline]
exit_to_user_mode_loop+0xcb/0xe0 kernel/entry/common.c:172
exit_to_user_mode_prepare kernel/entry/common.c:199 [inline]
syscall_exit_to_user_mode+0x68/0x90 kernel/entry/common.c:274
do_syscall_64+0x3d/0x40 arch/x86/entry/common.c:56
entry_SYSCALL_64_after_hwframe+0x61/0xcb
The buggy address belongs to the object at ffff88812b9e99c0
which belongs to the cache f2fs_inode_cache of size 1520
The buggy address is located 112 bytes to the right of
1520-byte region [ffff88812b9e99c0, ffff88812b9e9fb0)
The buggy address belongs to the page:
page:ffffea0004ae7a00 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88812b9eb9f0 pfn:0x12b9e8
head:ffffea0004ae7a00 order:3 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head)
raw: 4000000000010200 0000000000000000 0000000100000001 ffff8881029cd380
raw: ffff88812b9eb9f0 0000000080130002 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Reclaimable, gfp_mask 0x1d2050(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 827, ts 82570199000, free_ts 0
set_page_owner include/linux/page_owner.h:35 [inline]
post_alloc_hook mm/page_alloc.c:2456 [inline]
prep_new_page+0x179/0x180 mm/page_alloc.c:2462
get_page_from_freelist+0x2235/0x23d0 mm/page_alloc.c:4254
__alloc_pages_nodemask+0x268/0x5f0 mm/page_alloc.c:5349
alloc_slab_page mm/slub.c:-1 [inline]
allocate_slab mm/slub.c:1808 [inline]
new_slab+0x84/0x3f0 mm/slub.c:1869
new_slab_objects mm/slub.c:2627 [inline]
___slab_alloc+0x2a6/0x450 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]
kmem_cache_alloc+0x1af/0x2e0 mm/slub.c:2960
f2fs_kmem_cache_alloc fs/f2fs/f2fs.h:2779 [inline]
f2fs_alloc_inode+0x26/0x410 fs/f2fs/super.c:1373
alloc_inode fs/inode.c:233 [inline]
iget_locked+0x146/0x7d0 fs/inode.c:1275
f2fs_iget+0x55/0x4dc0 fs/f2fs/inode.c:498
f2fs_fill_super+0x45ba/0x6c70 fs/f2fs/super.c:4301
mount_bdev+0x28b/0x3a0 fs/super.c:1442
f2fs_mount+0x34/0x40 fs/f2fs/super.c:4548
legacy_get_tree+0xed/0x190 fs/fs_context.c:593
vfs_get_tree+0x89/0x260 fs/super.c:1572
do_new_mount+0x25a/0xa20 fs/namespace.c:2918
page_owner free stack trace missing
Memory state around the buggy address:
ffff88812b9e9f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff88812b9e9f80: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc
>ffff88812b9ea000: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00
^
ffff88812b9ea080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff88812b9ea100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f]
CPU: 1 PID: 25004 Comm: syz-executor Tainted: G B W 5.10.237-syzkaller-00309-g7e2543346ff7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:mapping_gfp_mask include/linux/pagemap.h:106 [inline]
RIP: 0010:grab_cache_page include/linux/pagemap.h:485 [inline]
RIP: 0010:f2fs_grab_cache_page fs/f2fs/f2fs.h:2703 [inline]
RIP: 0010:__get_node_page+0x123/0xac0 fs/f2fs/node.c:1425
Code: 80 3c 08 00 74 08 4c 89 f7 e8 49 58 96 ff 48 89 5d b8 49 8b 3e 48 8d 47 18 48 89 c1 48 c1 e9 03 49 be 00 00 00 00 00 fc ff df <42> 0f b6 0c 31 84 c9 0f 85 04 08 00 00 8b 4f 18 4c 89 fe ba 07 00
RSP: 0018:ffffc90000d67838 EFLAGS: 00010206
RAX: 0000000000000018 RBX: ffff8881288058b8 RCX: 0000000000000003
RDX: ffff88811576bb40 RSI: 0000000000000003 RDI: 0000000000000000
RBP: ffffc90000d67890 R08: dffffc0000000000 R09: ffffc90000d67a20
R10: fffff520001acf46 R11: 1ffff920001acf44 R12: ffff888128805800
R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000003
FS: 000055556624d500(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555566278528 CR3: 00000001041e8000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
f2fs_get_node_page fs/f2fs/node.c:1478 [inline]
f2fs_get_dnode_of_data+0x244/0x1760 fs/f2fs/node.c:779
f2fs_get_read_data_page+0x23d/0x790 fs/f2fs/data.c:1221
f2fs_find_data_page+0x18f/0x3f0 fs/f2fs/data.c:1279
f2fs_readdir+0x435/0x940 fs/f2fs/dir.c:1153
iterate_dir+0x260/0x570 fs/readdir.c:-1
__do_sys_getdents64 fs/readdir.c:369 [inline]
__se_sys_getdents64+0xe5/0x240 fs/readdir.c:354
__x64_sys_getdents64+0x7b/0x90 fs/readdir.c:354
do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f76615c32d3
Code: c1 66 0f 1f 44 00 00 48 83 c4 08 48 89 ef 5b 5d e9 52 3e f8 ff 66 90 b8 ff ff ff 7f 48 39 c2 48 0f 47 d0 b8 d9 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 05 c3 0f 1f 40 00 48 c7 c2 a8 ff ff ff f7 d8
RSP: 002b:00007fffb5710758 EFLAGS: 00000293 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 0000555566270520 RCX: 00007f76615c32d3
RDX: 0000000000008000 RSI: 0000555566270520 RDI: 0000000000000006
RBP: 00005555662704f4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000001000 R11: 0000000000000293 R12: ffffffffffffffa8
R13: 0000000000000016 R14: 00005555662704f0 R15: 00007fffb5713b00
Modules linked in:
---[ end trace c541a60e937e35d4 ]---
RIP: 0010:mapping_gfp_mask include/linux/pagemap.h:106 [inline]
RIP: 0010:grab_cache_page include/linux/pagemap.h:485 [inline]
RIP: 0010:f2fs_grab_cache_page fs/f2fs/f2fs.h:2703 [inline]
RIP: 0010:__get_node_page+0x123/0xac0 fs/f2fs/node.c:1425
Code: 80 3c 08 00 74 08 4c 89 f7 e8 49 58 96 ff 48 89 5d b8 49 8b 3e 48 8d 47 18 48 89 c1 48 c1 e9 03 49 be 00 00 00 00 00 fc ff df <42> 0f b6 0c 31 84 c9 0f 85 04 08 00 00 8b 4f 18 4c 89 fe ba 07 00
RSP: 0018:ffffc90000d67838 EFLAGS: 00010206
RAX: 0000000000000018 RBX: ffff8881288058b8 RCX: 0000000000000003
RDX: ffff88811576bb40 RSI: 0000000000000003 RDI: 0000000000000000
RBP: ffffc90000d67890 R08: dffffc0000000000 R09: ffffc90000d67a20
R10: fffff520001acf46 R11: 1ffff920001acf44 R12: ffff888128805800
R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000003
FS: 000055556624d500(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f81ccc5b338 CR3: 00000001041e8000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1)
4: 74 08 je 0xe
6: 4c 89 f7 mov %r14,%rdi
9: e8 49 58 96 ff call 0xff965857
e: 48 89 5d b8 mov %rbx,-0x48(%rbp)
12: 49 8b 3e mov (%r14),%rdi
15: 48 8d 47 18 lea 0x18(%rdi),%rax
19: 48 89 c1 mov %rax,%rcx
1c: 48 c1 e9 03 shr $0x3,%rcx
20: 49 be 00 00 00 00 00 movabs $0xdffffc0000000000,%r14
27: fc ff df
* 2a: 42 0f b6 0c 31 movzbl (%rcx,%r14,1),%ecx <-- trapping instruction
2f: 84 c9 test %cl,%cl
31: 0f 85 04 08 00 00 jne 0x83b
37: 8b 4f 18 mov 0x18(%rdi),%ecx
3a: 4c 89 fe mov %r15,%rsi
3d: ba .byte 0xba
3e: 07 (bad)