==================================================================
BUG: KASAN: slab-out-of-bounds in shrink_folio_list+0x141d/0x37d0
Read of size 8 at addr ffff88803bb60851 by task syz-executor.0/10134
CPU: 0 PID: 10134 Comm: syz-executor.0 Not tainted 6.4.0-next-20230706 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
<TASK>
dump_stack_lvl+0x91/0xf0
print_report+0xcc/0x620
kasan_report+0xbe/0xf0
kasan_check_range+0x39/0x1b0
shrink_folio_list+0x141d/0x37d0
reclaim_folio_list+0xc4/0x300
reclaim_pages+0x377/0x520
madvise_cold_or_pageout_pte_range+0xc9c/0xf90
walk_pgd_range+0xcc3/0x1740
__walk_page_range+0x5f6/0x720
walk_page_range+0x316/0x4b0
madvise_pageout+0x30b/0x580
madvise_vma_behavior+0x413/0x20a0
do_madvise.part.0+0x39a/0x650
__x64_sys_madvise+0x10c/0x160
do_syscall_64+0x3f/0x90
entry_SYSCALL_64_after_hwframe+0x6e/0xd8
RIP: 0033:0x7f9574e0fb19
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f9572385188 EFLAGS: 00000246 ORIG_RAX: 000000000000001c
RAX: ffffffffffffffda RBX: 00007f9574f22f60 RCX: 00007f9574e0fb19
RDX: 0000000000000015 RSI: 0000000000004000 RDI: 0000000020ffa000
RBP: 00007f9574e69f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff4c4fbc0f R14: 00007f9572385300 R15: 0000000000022000
</TASK>
Allocated by task 275:
kasan_save_stack+0x22/0x50
kasan_set_track+0x25/0x30
__kasan_slab_alloc+0x59/0x70
kmem_cache_alloc+0x17b/0x390
anon_vma_fork+0xe6/0x630
dup_mmap+0xaf9/0x1250
copy_process+0x3e68/0x7320
kernel_clone+0xeb/0x7d0
__do_sys_clone+0xba/0x100
do_syscall_64+0x3f/0x90
entry_SYSCALL_64_after_hwframe+0x6e/0xd8
The buggy address belongs to the object at ffff88803bb60770
which belongs to the cache anon_vma of size 208
The buggy address is located 17 bytes to the right of
allocated 208-byte region [ffff88803bb60770, ffff88803bb60840)
The buggy address belongs to the physical page:
page:00000000fb8c96ab refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x3bb60
memcg:ffff88800e889301
flags: 0x100000000000200(slab|node=0|zone=1)
page_type: 0xffffffff()
raw: 0100000000000200 ffff8880087a2280 dead000000000100 dead000000000122
raw: 0000000000000000 00000000800f000f 00000001ffffffff ffff88800e889301
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff88803bb60700: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 00
ffff88803bb60780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88803bb60800: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
^
ffff88803bb60880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff88803bb60900: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc
==================================================================
audit: type=1326 audit(1688642418.895:17): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=10128 comm="syz-executor.6" exe="/syz-executor.6" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f5d35da3b19 code=0x0
audit: type=1326 audit(1688642419.571:18): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=10128 comm="syz-executor.6" exe="/syz-executor.6" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f5d35da3b19 code=0x0
audit: type=1326 audit(1688642419.762:19): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=10171 comm="syz-executor.6" exe="/syz-executor.6" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f5d35da3b19 code=0x0
audit: type=1326 audit(1688642420.026:20): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=10185 comm="syz-executor.0" exe="/syz-executor.0" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f9574e0fb19 code=0x0
audit: type=1326 audit(1688642422.279:22): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=10192 comm="syz-executor.0" exe="/syz-executor.0" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f9574e0fb19 code=0x0
audit: type=1326 audit(1688642422.272:21): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=10191 comm="syz-executor.6" exe="/syz-executor.6" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f5d35da3b19 code=0x0
audit: type=1326 audit(1688642423.218:23): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=10227 comm="syz-executor.0" exe="/syz-executor.0" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f9574e0fb19 code=0x0
: Can't open blockdev