------------[ cut here ]------------ WARNING: CPU: 1 PID: 10823 at fs/ext4/ext4_jbd2.c:76 ext4_journal_check_start+0x24f/0x2b0 fs/ext4/ext4_jbd2.c:76 Modules linked in: CPU: 1 UID: 0 PID: 10823 Comm: syz.8.567 Not tainted 6.16.0-syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:ext4_journal_check_start+0x24f/0x2b0 fs/ext4/ext4_jbd2.c:76 Code: 5b 41 5c 41 5d 41 5e 41 5f 5d e9 bc 6e 00 09 cc e8 56 31 57 ff 41 bf fb ff ff ff eb e0 e8 49 31 57 ff eb d3 e8 42 31 57 ff 90 <0f> 0b 90 eb c8 e8 37 31 57 ff 90 0f 0b 90 43 80 7c 25 00 00 0f 85 RSP: 0018:ffffc90004fff398 EFLAGS: 00010287 RAX: ffffffff8268f47e RBX: ffff888028036000 RCX: 0000000000080000 RDX: ffffc9000d84d000 RSI: 000000000000031a RDI: 000000000000031b RBP: 0000000000000364 R08: ffff888069288387 R09: 1ffff1100d251070 R10: dffffc0000000000 R11: ffffed100d251071 R12: dffffc0000000000 R13: 1ffff11005006cc8 R14: ffff888028036640 R15: 0000000000000001 FS: 00007ff1f99fb6c0(0000) GS:ffff888125d57000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f143d21f000 CR3: 000000002baa2000 CR4: 00000000003526f0 Call Trace: __ext4_journal_start_sb+0x16b/0x5c0 fs/ext4/ext4_jbd2.c:108 ext4_sample_last_mounted fs/ext4/file.c:868 [inline] ext4_file_open+0x72c/0xa40 fs/ext4/file.c:900 do_dentry_open+0xdf0/0x1970 fs/open.c:964 vfs_open+0x3b/0x340 fs/open.c:1094 do_open fs/namei.c:3896 [inline] path_openat+0x2ee5/0x3830 fs/namei.c:4055 do_filp_open+0x1fa/0x410 fs/namei.c:4082 do_open_execat+0x135/0x540 fs/exec.c:783 open_exec+0x40/0x60 fs/exec.c:822 bm_register_write+0x2d1/0x1750 fs/binfmt_misc.c:833 vfs_write+0x27e/0xa90 fs/read_write.c:684 ksys_write+0x145/0x250 fs/read_write.c:738 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff1f8b8e9a9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ff1f99fb038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007ff1f8db6080 RCX: 00007ff1f8b8e9a9 RDX: 000000000000004b RSI: 0000200000000140 RDI: 0000000000000004 RBP: 00007ff1f8c10d69 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007ff1f8db6080 R15: 00007ffcb83e1e28