INFO: task jbd2/sda1-8:74 blocked for more than 122 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:jbd2/sda1-8 state:D stack:0 pid:74 tgid:74 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:6124 [inline]
__schedule+0x16e0/0x2380 kernel/sched/core.c:7971
__schedule_loop kernel/sched/core.c:8046 [inline]
schedule+0xc1/0x170 kernel/sched/core.c:8061
io_schedule+0x85/0x150 kernel/sched/core.c:8876
bit_wait_io+0x17/0xd0 kernel/sched/wait_bit.c:209
__wait_on_bit+0xb6/0x2e0 kernel/sched/wait_bit.c:49
out_of_line_wait_on_bit+0x139/0x190 kernel/sched/wait_bit.c:64
wait_on_bit_io include/linux/wait_bit.h:101 [inline]
__wait_on_buffer+0x5a/0x70 fs/buffer.c:123
wait_on_buffer include/linux/buffer_head.h:422 [inline]
jbd2_journal_commit_transaction+0x2dba/0x5510 fs/jbd2/commit.c:814
kjournald2+0x386/0x6a0 fs/jbd2/journal.c:201
kthread+0x2c7/0x360 kernel/kthread.c:389
ret_from_fork+0x64/0xa0 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
INFO: task syz-executor422:313 blocked for more than 123 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor422 state:D stack:0 pid:313 tgid:313 ppid:311 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:6124 [inline]
__schedule+0x16e0/0x2380 kernel/sched/core.c:7971
__schedule_loop kernel/sched/core.c:8046 [inline]
schedule+0xc1/0x170 kernel/sched/core.c:8061
io_schedule+0x85/0x150 kernel/sched/core.c:8876
bit_wait_io+0x17/0xd0 kernel/sched/wait_bit.c:209
__wait_on_bit+0xb6/0x2e0 kernel/sched/wait_bit.c:49
out_of_line_wait_on_bit+0x139/0x190 kernel/sched/wait_bit.c:64
wait_on_bit_io include/linux/wait_bit.h:101 [inline]
do_get_write_access+0x558/0xd70 fs/jbd2/transaction.c:1096
jbd2_journal_get_write_access+0x268/0x3d0 fs/jbd2/transaction.c:1245
__ext4_journal_get_write_access+0x1b6/0x6a0 fs/ext4/ext4_jbd2.c:239
ext4_delete_entry+0x32f/0x520 fs/ext4/namei.c:2739
__ext4_unlink+0x55a/0xb50 fs/ext4/namei.c:3279
ext4_unlink+0x13e/0x3a0 fs/ext4/namei.c:3327
vfs_unlink+0x382/0x670 fs/namei.c:4477
do_unlinkat+0x381/0x5a0 fs/namei.c:4541
__do_sys_unlink fs/namei.c:4589 [inline]
__se_sys_unlink fs/namei.c:4587 [inline]
__x64_sys_unlink+0x4b/0x60 fs/namei.c:4587
x64_sys_call+0x286c/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:88
do_syscall_x64 arch/x86/entry/common.c:47 [inline]
do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78
entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f4c6b053477
RSP: 002b:00007ffc325bdac8 EFLAGS: 00000206 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f4c6b053477
RDX: 00007ffc325bdaf0 RSI: 00007ffc325bdb80 RDI: 00007ffc325bdb80
RBP: 00007ffc325bdb80 R08: 00007ffc325beb80 R09: 00000000ffffffff
R10: 0000000000000100 R11: 0000000000000206 R12: 00007ffc325bebf0
R13: 000055556943c730 R14: 00007ffc325bebf0 R15: 000000000000004e
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 37 Comm: khungtaskd Not tainted syzkaller #0 ff996278633adec6fd25d1632b496761701c4fe9
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/06/2026
Call Trace:
__dump_stack+0x21/0x30 lib/dump_stack.c:94
dump_stack_lvl+0x140/0x1c0 lib/dump_stack.c:120
dump_stack+0x19/0x20 lib/dump_stack.c:129
nmi_cpu_backtrace+0x2ba/0x2d0 lib/nmi_backtrace.c:114
nmi_trigger_cpumask_backtrace+0x142/0x2c0 lib/nmi_backtrace.c:63
arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:41
cpumask_backtrace+0x1f/0x30 lib/nmi_backtrace.c:127
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:267 [inline]
watchdog+0xe45/0xf90 kernel/hung_task.c:423
kthread+0x2c7/0x360 kernel/kthread.c:389
ret_from_fork+0x64/0xa0 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted syzkaller #0 ff996278633adec6fd25d1632b496761701c4fe9
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/06/2026
RIP: 0010:pv_native_safe_halt+0x13/0x20 arch/x86/kernel/paravirt.c:116
Code: cc cc cc cc cc cc cc b8 b2 13 da ea 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 83 89 3c 00 55 48 89 e5 fb f4 <5d> c3 cc cc cc cc cc cc cc cc cc cc cc b8 00 00 00 00 90 90 90 90
RSP: 0018:ffffc900001a7e00 EFLAGS: 000002c2
RAX: ffff8881f6d00000 RBX: ffff8881036693c0 RCX: ffffffff85aad53d
RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000028f54
RBP: ffffc900001a7e00 R08: ffff8881f6d396fb R09: 1ffff1103eda72df
R10: dffffc0000000000 R11: ffffed103eda72e0 R12: 0000000000000000
R13: 1ffff110206cd278 R14: dffffc0000000000 R15: ffffffff886dd8a8
FS: 0000000000000000(0000) GS:ffff8881f6d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4c6b093130 CR3: 000000010d748000 CR4: 00000000003526b0
Call Trace:
arch_safe_halt arch/x86/include/asm/paravirt.h:-1 [inline]
default_idle+0x17/0x30 arch/x86/kernel/process.c:754
arch_cpu_idle+0xd/0x20 arch/x86/kernel/process.c:791
default_idle_call+0x3e/0x80 kernel/sched/idle.c:117
cpuidle_idle_call kernel/sched/idle.c:193 [inline]
do_idle+0x1df/0x570 kernel/sched/idle.c:346
cpu_startup_entry+0x47/0x60 kernel/sched/idle.c:445
start_secondary+0x12e/0x140 arch/x86/kernel/smpboot.c:314
common_startup_64+0x13b/0x157