loop0: detected capacity change from 0 to 32768
==================================================================
BUG: KASAN: slab-out-of-bounds in jfs_readdir+0x16c4/0x31dc fs/jfs/jfs_dtree.c:3201
Read of size 1 at addr ffff0000ecc38af5 by task syz.0.18/4885

CPU: 0 PID: 4885 Comm: syz.0.18 Not tainted 5.15.180-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call trace:
 dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
 print_address_description+0x7c/0x3f0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:434 [inline]
 kasan_report+0x174/0x1e4 mm/kasan/report.c:451
 __asan_report_load1_noabort+0x44/0x50 mm/kasan/report_generic.c:306
 jfs_readdir+0x16c4/0x31dc fs/jfs/jfs_dtree.c:3201
 iterate_dir+0x1f4/0x4ec fs/readdir.c:-1
 __do_sys_getdents64 fs/readdir.c:369 [inline]
 __se_sys_getdents64 fs/readdir.c:354 [inline]
 __arm64_sys_getdents64+0x1c4/0x4c4 fs/readdir.c:354
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584

Allocated by task 0:
(stack is not available)

The buggy address belongs to the object at ffff0000ecc38940
 which belongs to the cache jfs_ip of size 2240
The buggy address is located 437 bytes inside of
 2240-byte region [ffff0000ecc38940, ffff0000ecc39200)
The buggy address belongs to the page:
page:00000000bab18a22 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x12cc38
head:00000000bab18a22 order:3 compound_mapcount:0 compound_pincount:0
memcg:ffff0000c1e72f01
flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000010200 0000000000000000 dead000000000122 ffff0000c62a8a80
raw: 0000000000000000 00000000800d000d 00000001ffffffff ffff0000c1e72f01
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000ecc38980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff0000ecc38a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff0000ecc38a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                                             ^
 ffff0000ecc38b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff0000ecc38b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
ERROR: (device loop0): jfs_readdir: JFS:Dtree error: ino = 2, bn=0, index = 0

ERROR: (device loop0): remounting filesystem as read-only
read_mapping_page failed!
bread failed!