==================================================================
BUG: KASAN: use-after-free in ocfs2_replay_truncate_records fs/ocfs2/alloc.c:5959 [inline]
BUG: KASAN: use-after-free in __ocfs2_flush_truncate_log+0x64c/0xf30 fs/ocfs2/alloc.c:6053
Read of size 4 at addr ffff0000e65faab8 by task syz-executor/4689

CPU: 1 PID: 4689 Comm: syz-executor Not tainted 5.15.185-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call trace:
 dump_backtrace+0x0/0x43c arch/arm64/kernel/stacktrace.c:152
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106
 print_address_description+0x78/0x30c mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:434 [inline]
 kasan_report+0xec/0x15c mm/kasan/report.c:451
 __asan_report_load4_noabort+0x44/0x50 mm/kasan/report_generic.c:308
 ocfs2_replay_truncate_records fs/ocfs2/alloc.c:5959 [inline]
 __ocfs2_flush_truncate_log+0x64c/0xf30 fs/ocfs2/alloc.c:6053
 ocfs2_flush_truncate_log+0x48/0x68 fs/ocfs2/alloc.c:6075
 ocfs2_sync_fs+0xf8/0x2a4 fs/ocfs2/super.c:403
 sync_filesystem+0x1a0/0x218 fs/sync.c:66
 generic_shutdown_super+0x70/0x2f0 fs/super.c:448
 kill_block_super+0x70/0xdc fs/super.c:1427
 deactivate_locked_super+0xb8/0x13c fs/super.c:335
 deactivate_super+0xf8/0x118 fs/super.c:366
 cleanup_mnt+0x3a4/0x458 fs/namespace.c:1139
 __cleanup_mnt+0x20/0x30 fs/namespace.c:1146
 task_work_run+0x12c/0x1e0 kernel/task_work.c:188
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 do_notify_resume+0x24b4/0x3128 arch/arm64/kernel/signal.c:949
 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline]
 el0_svc+0xf0/0x1e0 arch/arm64/kernel/entry-common.c:609
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584

The buggy address belongs to the page:
page:000000009d38ed25 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x1265fa
flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000000000 fffffc0003997ec8 fffffc0003997e48 0000000000000000
raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000e65fa980: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff0000e65faa00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff0000e65faa80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                                        ^
 ffff0000e65fab00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff0000e65fab80: 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:2469!
Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 4689 Comm: syz-executor Tainted: G    B             5.15.185-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : _ocfs2_free_suballoc_bits+0xc50/0xf70 fs/ocfs2/suballoc.c:2469
lr : _ocfs2_free_suballoc_bits+0xc50/0xf70 fs/ocfs2/suballoc.c:2469
sp : ffff80001fac73a0
x29: ffff80001fac7500 x28: 0000000074732e20 x27: dfff800000000000
x26: ffff0000dcac7630 x25: ffff800009cdfc18 x24: ffff0000e6570e00
x23: ffff700003f58e84 x22: 0000000000000e00 x21: 0000000000000e00
x20: 0000000642024000 x19: 0000000074733a52 x18: 1fffe0003422158e
x17: 1fffe0003422158e x16: ffff8000111a97c4 x15: ffff8000141fec20
x14: ffff0001a110ac80 x13: ffff0001a110ac7c x12: 0000000000ff0100
x11: 0000000000000000 x10: 0000000000000000 x9 : ffff800009ce5324
x8 : ffff0000c66651c0 x7 : 0000000000000000 x6 : ffff800009cdfc18
x5 : 0000000074732e20 x4 : 0000000642024000 x3 : 0000000000000c32
x2 : ffff0000e19580e8 x1 : 0000000000000e00 x0 : 0000000074733a52
Call trace:
 _ocfs2_free_suballoc_bits+0xc50/0xf70 fs/ocfs2/suballoc.c:2469
 _ocfs2_free_clusters+0x510/0x9b0 fs/ocfs2/suballoc.c:2569
 ocfs2_free_clusters+0x50/0x68 fs/ocfs2/suballoc.c:2590
 ocfs2_replay_truncate_records fs/ocfs2/alloc.c:5971 [inline]
 __ocfs2_flush_truncate_log+0x5b0/0xf30 fs/ocfs2/alloc.c:6053
 ocfs2_flush_truncate_log+0x48/0x68 fs/ocfs2/alloc.c:6075
 ocfs2_sync_fs+0xf8/0x2a4 fs/ocfs2/super.c:403
 sync_filesystem+0x1a0/0x218 fs/sync.c:66
 generic_shutdown_super+0x70/0x2f0 fs/super.c:448
 kill_block_super+0x70/0xdc fs/super.c:1427
 deactivate_locked_super+0xb8/0x13c fs/super.c:335
 deactivate_super+0xf8/0x118 fs/super.c:366
 cleanup_mnt+0x3a4/0x458 fs/namespace.c:1139
 __cleanup_mnt+0x20/0x30 fs/namespace.c:1146
 task_work_run+0x12c/0x1e0 kernel/task_work.c:188
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 do_notify_resume+0x24b4/0x3128 arch/arm64/kernel/signal.c:949
 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline]
 el0_svc+0xf0/0x1e0 arch/arm64/kernel/entry-common.c:609
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
Code: 17fffec8 979e4dc1 d4210000 979e4dbf (d4210000) 
---[ end trace 24fd2ee803983dff ]---