ocfs2: Mounting device (7,2) on (node local, slot 0) with ordered data mode.
==================================================================
BUG: KASAN: use-after-free in ocfs2_find_victim_chain fs/ocfs2/suballoc.c:1391 [inline]
BUG: KASAN: use-after-free in ocfs2_claim_suballoc_bits+0x88c/0x1bfc fs/ocfs2/suballoc.c:1927
Read of size 4 at addr ffff0000e485d000 by task syz.2.21/4519

CPU: 0 PID: 4519 Comm: syz.2.21 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
Call trace:
 dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106
 print_address_description+0x88/0x218 mm/kasan/report.c:316
 print_report+0x50/0x68 mm/kasan/report.c:420
 kasan_report+0xa8/0x100 mm/kasan/report.c:524
 __asan_report_load4_noabort+0x2c/0x38 mm/kasan/report_generic.c:350
 ocfs2_find_victim_chain fs/ocfs2/suballoc.c:1391 [inline]
 ocfs2_claim_suballoc_bits+0x88c/0x1bfc fs/ocfs2/suballoc.c:1927
 ocfs2_claim_new_inode+0x2e8/0x700 fs/ocfs2/suballoc.c:2210
 ocfs2_mknod_locked+0xfc/0x228 fs/ocfs2/namei.c:635
 ocfs2_mknod+0xe64/0x1f18 fs/ocfs2/namei.c:381
 ocfs2_create+0x19c/0x4f0 fs/ocfs2/namei.c:674
 lookup_open fs/namei.c:3490 [inline]
 open_last_lookups fs/namei.c:3558 [inline]
 path_openat+0x112c/0x2680 fs/namei.c:3788
 do_filp_open+0x174/0x344 fs/namei.c:3818
 do_sys_openat2+0x128/0x3d8 fs/open.c:1320
 do_sys_open fs/open.c:1336 [inline]
 __do_sys_openat fs/open.c:1352 [inline]
 __se_sys_openat fs/open.c:1347 [inline]
 __arm64_sys_openat+0x120/0x154 fs/open.c:1347
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585

The buggy address belongs to the physical page:
page:000000009168c64a refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x12485d
flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000000000 fffffc0003839748 fffffc0003e60ec8 0000000000000000
raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000e485cf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff0000e485cf80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff0000e485d000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff0000e485d080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff0000e485d100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================
(syz.2.21,4519,1):ocfs2_read_blocks:239 ERROR: status = -12
(syz.2.21,4519,1):ocfs2_search_chain:1761 ERROR: status = -12
(syz.2.21,4519,1):ocfs2_search_chain:1871 ERROR: status = -12
(syz.2.21,4519,1):ocfs2_claim_suballoc_bits:1940 ERROR: status = -12
(syz.2.21,4519,1):ocfs2_claim_suballoc_bits:1983 ERROR: status = -12
(syz.2.21,4519,1):ocfs2_claim_new_inode:2216 ERROR: status = -12
(syz.2.21,4519,1):ocfs2_claim_new_inode:2231 ERROR: status = -12
(syz.2.21,4519,1):ocfs2_mknod_locked:639 ERROR: status = -12
(syz.2.21,4519,1):ocfs2_mknod:385 ERROR: status = -12
(syz.2.21,4519,1):ocfs2_mknod:502 ERROR: status = -12
(syz.2.21,4519,1):ocfs2_create:676 ERROR: status = -12
(syz.2.21,4519,1):ocfs2_read_blocks:239 ERROR: status = -12
(syz.2.21,4519,1):ocfs2_search_chain:1761 ERROR: status = -12
(syz.2.21,4519,1):ocfs2_search_chain:1871 ERROR: status = -12
(syz.2.21,4519,1):ocfs2_claim_suballoc_bits:1940 ERROR: status = -12
(syz.2.21,4519,1):ocfs2_claim_suballoc_bits:1983 ERROR: status = -12
(syz.2.21,4519,1):ocfs2_claim_new_inode:2216 ERROR: status = -12
(syz.2.21,4519,1):ocfs2_claim_new_inode:2231 ERROR: status = -12
(syz.2.21,4519,1):ocfs2_mknod_locked:639 ERROR: status = -12
(syz.2.21,4519,1):ocfs2_mknod:385 ERROR: status = -12
(syz.2.21,4519,1):ocfs2_mknod:502 ERROR: status = -12
(syz.2.21,4519,1):ocfs2_mkdir:659 ERROR: status = -12
(syz.2.21,4519,1):ocfs2_read_blocks:239 ERROR: status = -12
(syz.2.21,4519,1):ocfs2_search_chain:1761 ERROR: status = -12
(syz.2.21,4519,1):ocfs2_search_chain:1871 ERROR: status = -12
(syz.2.21,4519,1):ocfs2_claim_suballoc_bits:1940 ERROR: status = -12
(syz.2.21,4519,1):ocfs2_claim_suballoc_bits:1983 ERROR: status = -12
(syz.2.21,4519,1):ocfs2_claim_new_inode:2216 ERROR: status = -12
(syz.2.21,4519,1):ocfs2_claim_new_inode:2231 ERROR: status = -12
(syz.2.21,4519,1):ocfs2_mknod_locked:639 ERROR: status = -12
(syz.2.21,4519,1):ocfs2_mknod:385 ERROR: status = -12
(syz.2.21,4519,1):ocfs2_mknod:502 ERROR: status = -12
(syz.2.21,4519,1):ocfs2_mkdir:659 ERROR: status = -12