==================================================================
BUG: KASAN: slab-out-of-bounds in cleancache_fs_enabled_mapping include/linux/cleancache.h:54 [inline]
BUG: KASAN: slab-out-of-bounds in cleancache_invalidate_page include/linux/cleancache.h:108 [inline]
BUG: KASAN: slab-out-of-bounds in unaccount_page_cache_page+0x6e6/0x750 mm/filemap.c:169
Read of size 4 at addr ffff88819fd8d488 by task syz-executor.0/15788
CPU: 0 PID: 15788 Comm: syz-executor.0 Tainted: G W 5.4.242-syzkaller-00065-g10e0626a3202 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1d8/0x241 lib/dump_stack.c:118
print_address_description+0x8c/0x600 mm/kasan/report.c:384
__kasan_report+0xf3/0x120 mm/kasan/report.c:516
kasan_report+0x30/0x60 mm/kasan/common.c:653
cleancache_fs_enabled_mapping include/linux/cleancache.h:54 [inline]
cleancache_invalidate_page include/linux/cleancache.h:108 [inline]
unaccount_page_cache_page+0x6e6/0x750 mm/filemap.c:169
__delete_from_page_cache+0xd0/0x600 mm/filemap.c:237
__remove_mapping+0x4a2/0x590 mm/vmscan.c:978
shrink_page_list+0x22f9/0x42c0 mm/vmscan.c:1482
shrink_inactive_list+0x533/0xfe0 mm/vmscan.c:2001
shrink_list mm/vmscan.c:2293 [inline]
shrink_node_memcg+0xc42/0x2430 mm/vmscan.c:2623
shrink_node+0x389/0x14a0 mm/vmscan.c:2836
shrink_zones mm/vmscan.c:3053 [inline]
do_try_to_free_pages+0x63f/0x12b0 mm/vmscan.c:3111
try_to_free_mem_cgroup_pages+0x3f6/0x9b0 mm/vmscan.c:3412
memory_max_write+0x23a/0x440 mm/memcontrol.c:6224
cgroup_file_write+0x275/0x5f0 kernel/cgroup/cgroup.c:3898
kernfs_fop_write+0x2e2/0x3e0 fs/kernfs/file.c:315
__vfs_write+0x103/0x750 fs/read_write.c:494
vfs_write+0x206/0x4e0 fs/read_write.c:558
ksys_write+0x199/0x2c0 fs/read_write.c:611
do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
Allocated by task 15531:
save_stack mm/kasan/common.c:70 [inline]
set_track mm/kasan/common.c:78 [inline]
__kasan_kmalloc+0x171/0x210 mm/kasan/common.c:529
slab_post_alloc_hook mm/slab.h:584 [inline]
slab_alloc_node mm/slub.c:2829 [inline]
slab_alloc mm/slub.c:2837 [inline]
kmem_cache_alloc+0xd9/0x250 mm/slub.c:2842
getname_flags+0xb8/0x4e0 fs/namei.c:141
getname fs/namei.c:212 [inline]
user_path_create fs/namei.c:3773 [inline]
do_symlinkat+0xf2/0x400 fs/namei.c:4228
do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
Freed by task 15531:
save_stack mm/kasan/common.c:70 [inline]
set_track mm/kasan/common.c:78 [inline]
kasan_set_free_info mm/kasan/common.c:345 [inline]
__kasan_slab_free+0x1b5/0x270 mm/kasan/common.c:487
slab_free_hook mm/slub.c:1455 [inline]
slab_free_freelist_hook mm/slub.c:1494 [inline]
slab_free mm/slub.c:3080 [inline]
kmem_cache_free+0x10b/0x2c0 mm/slub.c:3096
filename_create+0x4ba/0x750 fs/namei.c:262
user_path_create fs/namei.c:3773 [inline]
do_symlinkat+0x104/0x400 fs/namei.c:4228
do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
The buggy address belongs to the object at ffff88819fd8c400
which belongs to the cache names_cache of size 4096
The buggy address is located 136 bytes to the right of
4096-byte region [ffff88819fd8c400, ffff88819fd8d400)
The buggy address belongs to the page:
page:ffffea00067f6200 refcount:1 mapcount:0 mapping:ffff8881f5cfc000 index:0x0 compound_mapcount: 0
flags: 0x8000000000010200(slab|head)
raw: 8000000000010200 dead000000000100 dead000000000122 ffff8881f5cfc000
raw: 0000000000000000 0000000000070007 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)
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook mm/page_alloc.c:2165 [inline]
prep_new_page+0x18f/0x370 mm/page_alloc.c:2171
get_page_from_freelist+0x2d13/0x2d90 mm/page_alloc.c:3794
__alloc_pages_nodemask+0x393/0x840 mm/page_alloc.c:4891
alloc_slab_page+0x39/0x3c0 mm/slub.c:343
allocate_slab mm/slub.c:1683 [inline]
new_slab+0x97/0x440 mm/slub.c:1749
new_slab_objects mm/slub.c:2505 [inline]
___slab_alloc+0x2fe/0x490 mm/slub.c:2667
__slab_alloc+0x62/0xa0 mm/slub.c:2707
slab_alloc_node mm/slub.c:2792 [inline]
slab_alloc mm/slub.c:2837 [inline]
kmem_cache_alloc+0x109/0x250 mm/slub.c:2842
getname_kernel+0x55/0x2d0 fs/namei.c:221
kern_path+0x19/0x40 fs/namei.c:2509
unix_find_other+0xdb/0x810 net/unix/af_unix.c:950
unix_dgram_connect+0x3ee/0xcd0 net/unix/af_unix.c:1165
__sys_connect+0x336/0x460 net/socket.c:1818
__do_sys_connect net/socket.c:1829 [inline]
__se_sys_connect net/socket.c:1826 [inline]
__x64_sys_connect+0x76/0x80 net/socket.c:1826
do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1176 [inline]
__free_pages_ok+0x847/0x950 mm/page_alloc.c:1438
free_the_page mm/page_alloc.c:4953 [inline]
__free_pages+0x91/0x140 mm/page_alloc.c:4959
__free_slab+0x221/0x2e0 mm/slub.c:1774
__slab_free+0x34b/0x360 mm/slub.c:3012
qlist_free_all+0x43/0xb0 mm/kasan/quarantine.c:167
quarantine_reduce+0x1d9/0x210 mm/kasan/quarantine.c:260
__kasan_kmalloc+0x41/0x210 mm/kasan/common.c:507
slab_post_alloc_hook mm/slab.h:584 [inline]
slab_alloc_node mm/slub.c:2829 [inline]
slab_alloc mm/slub.c:2837 [inline]
kmem_cache_alloc+0xd9/0x250 mm/slub.c:2842
getname_flags+0xb8/0x4e0 fs/namei.c:141
getname fs/namei.c:212 [inline]
__do_sys_unlink fs/namei.c:4191 [inline]
__se_sys_unlink fs/namei.c:4189 [inline]
__x64_sys_unlink+0x38/0x50 fs/namei.c:4189
do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
Memory state around the buggy address:
ffff88819fd8d380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88819fd8d400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88819fd8d480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
^
ffff88819fd8d500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88819fd8d580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
syz-executor.0 invoked oom-killer: gfp_mask=0xcc0(GFP_KERNEL), order=0, oom_score_adj=1000
CPU: 1 PID: 15788 Comm: syz-executor.0 Tainted: G B W 5.4.242-syzkaller-00065-g10e0626a3202 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1d8/0x241 lib/dump_stack.c:118
dump_header+0xd5/0x6b0 mm/oom_kill.c:460
oom_kill_process+0xeb/0x2c0 mm/oom_kill.c:974
out_of_memory+0x5e1/0x890 mm/oom_kill.c:1111
mem_cgroup_out_of_memory+0x211/0x270 mm/memcontrol.c:1611
memory_max_write+0x329/0x440 mm/memcontrol.c:6231
cgroup_file_write+0x275/0x5f0 kernel/cgroup/cgroup.c:3898
kernfs_fop_write+0x2e2/0x3e0 fs/kernfs/file.c:315
__vfs_write+0x103/0x750 fs/read_write.c:494
vfs_write+0x206/0x4e0 fs/read_write.c:558
ksys_write+0x199/0x2c0 fs/read_write.c:611
do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
memory: usage 10276kB, limit 0kB, failcnt 434
swap: usage 0kB, limit 9007199254740988kB, failcnt 0
Memory cgroup stats for /syz1:
anon 12288
file 10465280
kernel_stack 0
slab 0
sock 16384
shmem 10584064
file_mapped 270336
file_dirty 0
file_writeback 0
anon_thp 0
inactive_anon 6352896
active_anon 4325376
inactive_file 0
active_file 0
unevictable 0
slab_reclaimable 0
slab_unreclaimable 0
pgfault 863709
pgmajfault 0
workingset_refault 33
workingset_activate 0
workingset_nodereclaim 0
pgrefill 750
pgscan 728
pgsteal 80
pgactivate 990
oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=syz0,mems_allowed=0,oom_memcg=/syz1,task_memcg=/syz1,task=syz-executor.1,pid=9750,uid=0
Memory cgroup out of memory: Killed process 9750 (syz-executor.1) total-vm:48516kB, anon-rss:476kB, file-rss:15284kB, shmem-rss:64kB, UID:0 pgtables:88kB oom_score_adj:0