INFO: task jbd2/sda1-8:73 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:73 tgid:73 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:6060 [inline]
__schedule+0x1496/0x20b0 kernel/sched/core.c:7880
__schedule_loop kernel/sched/core.c:7957 [inline]
schedule+0xc5/0x240 kernel/sched/core.c:7972
io_schedule+0x88/0xe0 kernel/sched/core.c:8786
bit_wait_io+0x17/0xd0 kernel/sched/wait_bit.c:209
__wait_on_bit+0xb3/0x2e0 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
INFO: task syz-executor218:313 blocked for more than 123 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor218 state:D stack:0 pid:313 tgid:313 ppid:312 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:6060 [inline]
__schedule+0x1496/0x20b0 kernel/sched/core.c:7880
__schedule_loop kernel/sched/core.c:7957 [inline]
schedule+0xc5/0x240 kernel/sched/core.c:7972
io_schedule+0x88/0xe0 kernel/sched/core.c:8786
bit_wait_io+0x17/0xd0 kernel/sched/wait_bit.c:209
__wait_on_bit+0xb3/0x2e0 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_reserve_inode_write+0x1f6/0x2e0 fs/ext4/inode.c:5892
__ext4_mark_inode_dirty+0xac/0x5e0 fs/ext4/inode.c:6066
ext4_dirty_inode+0xc9/0x110 fs/ext4/inode.c:6103
__mark_inode_dirty+0x251/0xc50 fs/fs-writeback.c:2515
generic_update_time fs/inode.c:2056 [inline]
inode_update_time fs/inode.c:2069 [inline]
touch_atime+0x2e5/0x470 fs/inode.c:2141
file_accessed include/linux/fs.h:2559 [inline]
iterate_dir+0x2db/0x5c0 fs/readdir.c:111
__do_sys_getdents64 fs/readdir.c:407 [inline]
__se_sys_getdents64+0xf6/0x250 fs/readdir.c:392
__x64_sys_getdents64+0x7f/0xa0 fs/readdir.c:392
x64_sys_call+0x27d0/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:218
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: 0033:0x7ff380cbd493
RSP: 002b:00007ffeaae266f8 EFLAGS: 00000293 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 000055556fc28730 RCX: 00007ff380cbd493
RDX: 0000000000008000 RSI: 000055556fc28760 RDI: 0000000000000003
RBP: 000055556fc28760 R08: 00007ff380d341e0 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000293 R12: 000055556fc28734
R13: ffffffffffffffd8 R14: 0000000000000016 R15: 0000000000000006
INFO: task syz-executor218:314 blocked for more than 123 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor218 state:D stack:0 pid:314 tgid:314 ppid:312 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:6060 [inline]
__schedule+0x1496/0x20b0 kernel/sched/core.c:7880
__schedule_loop kernel/sched/core.c:7957 [inline]
schedule+0xc5/0x240 kernel/sched/core.c:7972
io_schedule+0x88/0xe0 kernel/sched/core.c:8786
bit_wait_io+0x17/0xd0 kernel/sched/wait_bit.c:209
__wait_on_bit+0xb3/0x2e0 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_reserve_inode_write+0x1f6/0x2e0 fs/ext4/inode.c:5892
__ext4_mark_inode_dirty+0xac/0x5e0 fs/ext4/inode.c:6066
ext4_dirty_inode+0xc9/0x110 fs/ext4/inode.c:6103
__mark_inode_dirty+0x251/0xc50 fs/fs-writeback.c:2515
generic_update_time fs/inode.c:2056 [inline]
inode_update_time fs/inode.c:2069 [inline]
touch_atime+0x2e5/0x470 fs/inode.c:2141
file_accessed include/linux/fs.h:2559 [inline]
iterate_dir+0x2db/0x5c0 fs/readdir.c:111
__do_sys_getdents64 fs/readdir.c:407 [inline]
__se_sys_getdents64+0xf6/0x250 fs/readdir.c:392
__x64_sys_getdents64+0x7f/0xa0 fs/readdir.c:392
x64_sys_call+0x27d0/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:218
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: 0033:0x7ff380cbd493
RSP: 002b:00007ffeaae25608 EFLAGS: 00000293 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 000055556fc30770 RCX: 00007ff380cbd493
RDX: 0000000000008000 RSI: 000055556fc307a0 RDI: 0000000000000004
RBP: 000055556fc307a0 R08: 00007ff380d341e0 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000293 R12: 000055556fc30774
R13: ffffffffffffffd8 R14: 0000000000000016 R15: 0000000000000006
INFO: task syz-executor218:315 blocked for more than 123 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor218 state:D stack:0 pid:315 tgid:315 ppid:312 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:6060 [inline]
__schedule+0x1496/0x20b0 kernel/sched/core.c:7880
__schedule_loop kernel/sched/core.c:7957 [inline]
schedule+0xc5/0x240 kernel/sched/core.c:7972
io_schedule+0x88/0xe0 kernel/sched/core.c:8786
bit_wait_io+0x17/0xd0 kernel/sched/wait_bit.c:209
__wait_on_bit+0xb3/0x2e0 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_reserve_inode_write+0x1f6/0x2e0 fs/ext4/inode.c:5892
__ext4_mark_inode_dirty+0xac/0x5e0 fs/ext4/inode.c:6066
ext4_dirty_inode+0xc9/0x110 fs/ext4/inode.c:6103
__mark_inode_dirty+0x251/0xc50 fs/fs-writeback.c:2515
generic_update_time fs/inode.c:2056 [inline]
inode_update_time fs/inode.c:2069 [inline]
touch_atime+0x2e5/0x470 fs/inode.c:2141
file_accessed include/linux/fs.h:2559 [inline]
iterate_dir+0x2db/0x5c0 fs/readdir.c:111
__do_sys_getdents64 fs/readdir.c:407 [inline]
__se_sys_getdents64+0xf6/0x250 fs/readdir.c:392
__x64_sys_getdents64+0x7f/0xa0 fs/readdir.c:392
x64_sys_call+0x27d0/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:218
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: 0033:0x7ff380cbd493
RSP: 002b:00007ffeaae266f8 EFLAGS: 00000293 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 000055556fc28730 RCX: 00007ff380cbd493
RDX: 0000000000008000 RSI: 000055556fc28760 RDI: 0000000000000003
RBP: 000055556fc28760 R08: 00007ff380d341e0 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000293 R12: 000055556fc28734
R13: ffffffffffffffd8 R14: 0000000000000016 R15: 0000000000000007
INFO: task syz-executor218:316 blocked for more than 124 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor218 state:D stack:0 pid:316 tgid:316 ppid:312 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:6060 [inline]
__schedule+0x1496/0x20b0 kernel/sched/core.c:7880
__schedule_loop kernel/sched/core.c:7957 [inline]
schedule+0xc5/0x240 kernel/sched/core.c:7972
io_schedule+0x88/0xe0 kernel/sched/core.c:8786
bit_wait_io+0x17/0xd0 kernel/sched/wait_bit.c:209
__wait_on_bit+0xb3/0x2e0 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_reserve_inode_write+0x1f6/0x2e0 fs/ext4/inode.c:5892
__ext4_mark_inode_dirty+0xac/0x5e0 fs/ext4/inode.c:6066
ext4_dirty_inode+0xc9/0x110 fs/ext4/inode.c:6103
__mark_inode_dirty+0x251/0xc50 fs/fs-writeback.c:2515
generic_update_time fs/inode.c:2056 [inline]
inode_update_time fs/inode.c:2069 [inline]
touch_atime+0x2e5/0x470 fs/inode.c:2141
file_accessed include/linux/fs.h:2559 [inline]
iterate_dir+0x2db/0x5c0 fs/readdir.c:111
__do_sys_getdents64 fs/readdir.c:407 [inline]
__se_sys_getdents64+0xf6/0x250 fs/readdir.c:392
__x64_sys_getdents64+0x7f/0xa0 fs/readdir.c:392
x64_sys_call+0x27d0/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:218
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: 0033:0x7ff380cbd493
RSP: 002b:00007ffeaae266f8 EFLAGS: 00000293 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 000055556fc28730 RCX: 00007ff380cbd493
RDX: 0000000000008000 RSI: 000055556fc28760 RDI: 0000000000000003
RBP: 000055556fc28760 R08: 00007ff380d341e0 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000293 R12: 000055556fc28734
R13: ffffffffffffffd8 R14: 0000000000000016 R15: 0000000000000007
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 37 Comm: khungtaskd Not tainted syzkaller #0 530bafefbfb71712cc923bbf40d44c9abc20558f
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
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:113
nmi_trigger_cpumask_backtrace+0x142/0x2c0 lib/nmi_backtrace.c:62
arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:41
trigger_all_cpu_backtrace include/linux/nmi.h:158 [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
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted syzkaller #0 530bafefbfb71712cc923bbf40d44c9abc20558f
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:pv_native_safe_halt+0x13/0x20 arch/x86/kernel/paravirt.c:116
Code: cc cc cc cc cc cc cc b8 e0 f0 8b 79 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 23 09 43 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:ffffffff87407da0 EFLAGS: 000002c2
RAX: ffff8881f6e00000 RBX: ffffffff874156c0 RCX: ffffffff85a454fd
RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000017564
RBP: ffffffff87407da0 R08: ffff8881f6e395eb R09: 1ffff1103edc72bd
R10: dffffc0000000000 R11: ffffed103edc72be R12: 0000000000000000
R13: 1ffffffff0e82ad8 R14: dffffc0000000000 R15: ffffffff87ecc268
FS: 0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055556fc30768 CR3: 000000010c7ac000 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
rest_init+0x10b/0x130 init/main.c:760
start_kernel+0x462/0x4bb init/main.c:1242
x86_64_start_reservations+0x2e/0x30 arch/x86/kernel/head64.c:507
x86_64_start_kernel+0x6a/0x7b arch/x86/kernel/head64.c:488
common_startup_64+0x13b/0x157