================================================================== 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 ffff0000e20a6f30 by task syz-executor/6561 CPU: 0 UID: 0 PID: 6561 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:0x7c pfn:0x1220a6 flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000000000 fffffdffc38829c8 fffffdffc3882948 0000000000000000 raw: 000000000000007c 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000e20a6e00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff0000e20a6e80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff0000e20a6f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff0000e20a6f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff0000e20a7000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ================================================================== (syz-executor,6561,1):ocfs2_inode_is_valid_to_delete:948 ERROR: Skipping delete of system file 68 ocfs2: Unmounting device (7,4) on (node local) EXT4-fs (loop4): unmounting filesystem 00000000-0000-0000-0000-000000000000.