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:
 <TASK>
 context_switch kernel/sched/core.c:6063 [inline]
 __schedule+0x1496/0x20b0 kernel/sched/core.c:7883
 __schedule_loop kernel/sched/core.c:7960 [inline]
 schedule+0xc5/0x240 kernel/sched/core.c:7975
 io_schedule+0x85/0x150 kernel/sched/core.c:8790
 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+0x67/0xa0 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 37 Comm: khungtaskd Not tainted syzkaller #0 9aa2cb443b149a071e1af4082fbb7f81a961e323
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
Call Trace:
 <TASK>
 __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+0x67/0xa0 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 310 Comm: sshd-session Not tainted syzkaller #0 9aa2cb443b149a071e1af4082fbb7f81a961e323
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
RIP: 0010:tcp_write_xmit+0x3a23/0x6d20 net/ipv4/tcp_output.c:2783
Code: e8 32 de 12 fd e9 3f ec ff ff 48 8b 4d b0 80 e1 07 80 c1 03 38 c1 0f 8c dd ee ff ff 48 8b 7d b0 e8 12 de 12 fd e9 cf ee ff ff <e8> e8 f1 b9 fc e9 99 01 00 00 e8 de f1 b9 fc e9 8f 01 00 00 e8 d4
RSP: 0018:ffffc900012af550 EFLAGS: 00000246
RAX: 1ffff110241c5672 RBX: ffff888120e2b390 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000580 RDI: 000000000000003c
RBP: ffffc900012af770 R08: ffff888121b7478f R09: 1ffff1102436e8f1
R10: dffffc0000000000 R11: ffffed102436e8f2 R12: ffff888120e2b890
R13: ffff888120e2b200 R14: ffff888120e2b390 R15: 0000000050e585b0
FS:  00007f19ea5ff300(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f60845d10f0 CR3: 0000000128ede000 CR4: 00000000003526b0
Call Trace:
 <TASK>
 __tcp_push_pending_frames+0x9d/0x300 net/ipv4/tcp_output.c:3037
 tcp_push+0x488/0x670 net/ipv4/tcp.c:755
 tcp_sendmsg_locked+0x3fce/0x4ac0 net/ipv4/tcp.c:1332
 tcp_sendmsg+0x3e/0xd0 net/ipv4/tcp.c:1365
 inet_sendmsg+0xb7/0x120 net/ipv4/af_inet.c:858
 sock_sendmsg_nosec net/socket.c:713 [inline]
 __sock_sendmsg net/socket.c:727 [inline]
 sock_write_iter+0x3bf/0x490 net/socket.c:1148
 new_sync_write fs/read_write.c:591 [inline]
 vfs_write+0x762/0xfd0 fs/read_write.c:684
 ksys_write+0x145/0x260 fs/read_write.c:737
 __do_sys_write fs/read_write.c:749 [inline]
 __se_sys_write fs/read_write.c:746 [inline]
 __x64_sys_write+0x7f/0x90 fs/read_write.c:746
 x64_sys_call+0x271c/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:2
 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: 0033:0x7f19e9ea7407
Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007fff831913b0 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f19ea5ff300 RCX: 00007f19e9ea7407
RDX: 000000000000003c RSI: 000055ca523fc3b0 RDI: 0000000000000004
RBP: 000055ca523d7c60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001
R13: 00007fff83191500 R14: 0000000000000000 R15: 0000000000000004
 </TASK>