syzbot

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WARNING: CPU: 0 PID: 7614 at fs/ext4/ext4_jbd2.c:76 ext4_journal_check_start fs/ext4/ext4_jbd2.c:76 [inline]
WARNING: CPU: 0 PID: 7614 at fs/ext4/ext4_jbd2.c:76 __ext4_journal_start_sb+0x460/0x88c fs/ext4/ext4_jbd2.c:108
Modules linked in:
CPU: 0 UID: 0 PID: 7614 Comm: syz.3.132 Not tainted syzkaller #0 PREEMPT 
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 : ext4_journal_check_start fs/ext4/ext4_jbd2.c:76 [inline]
pc : __ext4_journal_start_sb+0x460/0x88c fs/ext4/ext4_jbd2.c:108
lr : ext4_journal_check_start fs/ext4/ext4_jbd2.c:76 [inline]
lr : __ext4_journal_start_sb+0x460/0x88c fs/ext4/ext4_jbd2.c:108
sp : ffff8000a5037510
x29: ffff8000a5037520 x28: 1fffe0001ba928c8 x27: dfff800000000000
x26: ffff0000dd494050 x25: ffff0000dd494640 x24: ffff0000dd494000
x23: 0000000000000001 x22: 0000000000000000 x21: 0000000000000000
x20: 0000000000000000 x19: 0000000070810001 x18: 1fffe0003378f088
x17: ffff80008f7ee000 x16: ffff80008052aa64 x15: 0000000000000001
x14: 1fffe00033791b00 x13: 0000000000000000 x12: 0000000000000000
x11: 0000000000080000 x10: 0000000000001e63 x9 : ffff8000a755d000
x8 : 0000000000001e64 x7 : ffff800080493090 x6 : 0000000000000080
x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000
x2 : 0000000000000000 x1 : 0000000000000001 x0 : 0000000000000000
Call trace:
 ext4_journal_check_start fs/ext4/ext4_jbd2.c:76 [inline] (P)
 __ext4_journal_start_sb+0x460/0x88c fs/ext4/ext4_jbd2.c:108 (P)
 ext4_sample_last_mounted fs/ext4/file.c:869 [inline]
 ext4_file_open+0x5ac/0x84c fs/ext4/file.c:901
 do_dentry_open+0x7a4/0x10bc fs/open.c:965
 vfs_open+0x44/0x2d4 fs/open.c:1095
 do_open fs/namei.c:3887 [inline]
 path_openat+0x2424/0x2c40 fs/namei.c:4046
 do_filp_open+0x18c/0x36c fs/namei.c:4073
 do_sys_openat2+0x11c/0x1b4 fs/open.c:1435
 do_sys_open fs/open.c:1450 [inline]
 __do_sys_openat fs/open.c:1466 [inline]
 __se_sys_openat fs/open.c:1461 [inline]
 __arm64_sys_openat+0x120/0x158 fs/open.c:1461
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:744
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:763
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
irq event stamp: 224
hardirqs last  enabled at (223): [<ffff800080493124>] raw_spin_rq_unlock_irq kernel/sched/sched.h:1531 [inline]
hardirqs last  enabled at (223): [<ffff800080493124>] finish_lock_switch+0xb0/0x1c0 kernel/sched/core.c:5105
hardirqs last disabled at (224): [<ffff80008b01a2c4>] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:434
softirqs last  enabled at (208): [<ffff8000803da960>] softirq_handle_end kernel/softirq.c:425 [inline]
softirqs last  enabled at (208): [<ffff8000803da960>] handle_softirqs+0xaf8/0xc88 kernel/softirq.c:607
softirqs last disabled at (81): [<ffff800080022028>] __do_softirq+0x14/0x20 kernel/softirq.c:613
---[ end trace 0000000000000000 ]---