==================================================================
BUG: KASAN: use-after-free in ocfs2_replay_truncate_records fs/ocfs2/alloc.c:5967 [inline]
BUG: KASAN: use-after-free in __ocfs2_flush_truncate_log+0x684/0xf6c fs/ocfs2/alloc.c:6062
Read of size 4 at addr ffff0001026862c0 by task syz-executor/6543

CPU: 0 UID: 0 PID: 6543 Comm: syz-executor Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 print_address_description+0xa8/0x238 mm/kasan/report.c:378
 print_report+0x68/0x84 mm/kasan/report.c:482
 kasan_report+0xb0/0x110 mm/kasan/report.c:595
 __asan_report_load4_noabort+0x20/0x2c mm/kasan/report_generic.c:380
 ocfs2_replay_truncate_records fs/ocfs2/alloc.c:5967 [inline]
 __ocfs2_flush_truncate_log+0x684/0xf6c fs/ocfs2/alloc.c:6062
 ocfs2_flush_truncate_log+0x4c/0x6c fs/ocfs2/alloc.c:6084
 ocfs2_sync_fs+0xf8/0x2a4 fs/ocfs2/super.c:406
 sync_filesystem+0x1a0/0x218 fs/sync.c:66
 generic_shutdown_super+0x70/0x2b8 fs/super.c:622
 kill_block_super+0x44/0x90 fs/super.c:1766
 deactivate_locked_super+0xc4/0x12c fs/super.c:474
 deactivate_super+0xe0/0x100 fs/super.c:507
 cleanup_mnt+0x31c/0x3ac fs/namespace.c:1375
 __cleanup_mnt+0x20/0x30 fs/namespace.c:1382
 task_work_run+0x1dc/0x260 kernel/task_work.c:227
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop+0xfc/0x168 kernel/entry/common.c:43
 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
 arm64_exit_to_user_mode arch/arm64/kernel/entry-common.c:103 [inline]
 el0_svc+0x170/0x254 arch/arm64/kernel/entry-common.c:745
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:763
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x8 pfn:0x142686
flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000000000 fffffdffc409a9c8 fffffdffc40b3d48 0000000000000000
raw: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff000102686180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff000102686200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff000102686280: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                                           ^
 ffff000102686300: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff000102686380: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================
------------[ cut here ]------------
kernel BUG at fs/ocfs2/suballoc.c:2569!
Internal error: Oops - BUG: 00000000f2000800 [#1]  SMP
Modules linked in:
CPU: 1 UID: 0 PID: 6543 Comm: syz-executor Tainted: G    B               syzkaller #0 PREEMPT 
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : _ocfs2_free_suballoc_bits+0xf00/0x1210 fs/ocfs2/suballoc.c:2569
lr : _ocfs2_free_suballoc_bits+0xf00/0x1210 fs/ocfs2/suballoc.c:2569
sp : ffff8000a25a7540
x29: ffff8000a25a76c0 x28: ffff0000c17286e0 x27: 00000408fb600000
x26: ffff7000144b4ebc x25: ffff80008219f958 x24: dfff800000000000
x23: 000000000000ffff x22: 0000000000000e00 x21: 000000000001081f
x20: 00000408fb600000 x19: 0000000000000e00 x18: 1fffe00033776488
x17: ffff80008f85e000 x16: ffff80008b0365bc x15: 0000000000000001
x14: 0000000000000000 x13: 00000000fffffffc x12: 0000000000000000
x11: 0000000000000000 x10: 0000000000ff0100 x9 : 0000000000000000
x8 : ffff0000ddcf3d00 x7 : 0000000000000000 x6 : ffff80008219f958
x5 : 000000000000ffff x4 : 00000408fb600000 x3 : 0000000000000820
x2 : ffff0000fa9692b8 x1 : 0000000000000e00 x0 : 000000000001081f
Call trace:
 _ocfs2_free_suballoc_bits+0xf00/0x1210 fs/ocfs2/suballoc.c:2569 (P)
 _ocfs2_free_clusters+0x514/0x9bc fs/ocfs2/suballoc.c:2672
 ocfs2_free_clusters+0x50/0x68 fs/ocfs2/suballoc.c:2693
 ocfs2_replay_truncate_records fs/ocfs2/alloc.c:5979 [inline]
 __ocfs2_flush_truncate_log+0x5d8/0xf6c fs/ocfs2/alloc.c:6062
 ocfs2_flush_truncate_log+0x4c/0x6c fs/ocfs2/alloc.c:6084
 ocfs2_sync_fs+0xf8/0x2a4 fs/ocfs2/super.c:406
 sync_filesystem+0x1a0/0x218 fs/sync.c:66
 generic_shutdown_super+0x70/0x2b8 fs/super.c:622
 kill_block_super+0x44/0x90 fs/super.c:1766
 deactivate_locked_super+0xc4/0x12c fs/super.c:474
 deactivate_super+0xe0/0x100 fs/super.c:507
 cleanup_mnt+0x31c/0x3ac fs/namespace.c:1375
 __cleanup_mnt+0x20/0x30 fs/namespace.c:1382
 task_work_run+0x1dc/0x260 kernel/task_work.c:227
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop+0xfc/0x168 kernel/entry/common.c:43
 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
 arm64_exit_to_user_mode arch/arm64/kernel/entry-common.c:103 [inline]
 el0_svc+0x170/0x254 arch/arm64/kernel/entry-common.c:745
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:763
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
Code: 17ffff1e 97964249 d4210000 97964247 (d4210000) 
---[ end trace 0000000000000000 ]---