| Date | Name | Commit | Repro | Result |
|---|---|---|---|---|
| 2025/07/03 | lts (merge base) | e0e2f7824338 | C | [report] INFO: task hung in do_coredump |
| 2025/07/03 | upstream (ToT) | b4911fb0b060 | C | [report] INFO: task hung in do_coredump |
syzbot |
sign-in | mailing list | source | docs |
| Date | Name | Commit | Repro | Result |
|---|---|---|---|---|
| 2025/07/03 | lts (merge base) | e0e2f7824338 | C | [report] INFO: task hung in do_coredump |
| 2025/07/03 | upstream (ToT) | b4911fb0b060 | C | [report] INFO: task hung in do_coredump |
| Kernel | Title | Rank 🛈 | Repro | Cause bisect | Fix bisect | Count | Last | Reported | Patched | Status |
|---|---|---|---|---|---|---|---|---|---|---|
| upstream | INFO: task hung in do_coredump fs | 1 | 1 | 867d | 867d | 0/29 | auto-obsoleted due to no activity on 2023/05/26 05:58 | |||
| upstream | INFO: task hung in do_coredump (2) fs | 1 | 1 | 394d | 394d | 0/29 | auto-obsoleted due to no activity on 2024/09/10 17:47 | |||
| upstream | INFO: task hung in do_coredump (3) fs | 1 | C | done | 355 | 10h12m | 267d | 0/29 | upstream: reported C repro on 2024/10/17 09:02 |
INFO: task syz-executor327:309 blocked for more than 122 seconds.
Not tainted 6.12.30-syzkaller-gc40c54e66959 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor327 state:D stack:0 pid:309 tgid:301 ppid:297 flags:0x00004004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5924 [inline]
__schedule+0x145b/0x1f10 kernel/sched/core.c:7750
__schedule_loop kernel/sched/core.c:7831 [inline]
schedule+0xc6/0x240 kernel/sched/core.c:7846
schedule_timeout+0xb2/0x3a0 kernel/time/timer.c:2595
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common kernel/sched/completion.c:116 [inline]
wait_for_common+0x359/0x630 kernel/sched/completion.c:127
wait_for_completion_state+0x19/0x40 kernel/sched/completion.c:264
coredump_wait fs/coredump.c:419 [inline]
do_coredump+0x7cf/0x2bd0 fs/coredump.c:576
get_signal+0x11fd/0x14f0 kernel/signal.c:2919
arch_do_signal_or_restart+0x96/0x720 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x58/0xb0 kernel/entry/common.c:218
do_syscall_64+0x64/0xf0 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f25e314c799
RSP: 002b:00007f25e30d8218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 00000000000000ca RBX: 00007f25e31d63f8 RCX: 00007f25e314c799
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f25e31d63fc
RBP: 00007f25e31d63f0 R08: 0000000000000000 R09: 0000000000000000
R10: 00007ffe6f20b2f7 R11: 0000000000000246 R12: 00007f25e31a307c
R13: 000000000000006e R14: 00007ffe6f20b210 R15: 00007ffe6f20b2f8
</TASK>
INFO: task syz-executor327:311 blocked for more than 123 seconds.
Not tainted 6.12.30-syzkaller-gc40c54e66959 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor327 state:D stack:0 pid:311 tgid:302 ppid:298 flags:0x00004004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5924 [inline]
__schedule+0x145b/0x1f10 kernel/sched/core.c:7750
__schedule_loop kernel/sched/core.c:7831 [inline]
schedule+0xc6/0x240 kernel/sched/core.c:7846
schedule_timeout+0xb2/0x3a0 kernel/time/timer.c:2595
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common kernel/sched/completion.c:116 [inline]
wait_for_common+0x359/0x630 kernel/sched/completion.c:127
wait_for_completion_state+0x19/0x40 kernel/sched/completion.c:264
coredump_wait fs/coredump.c:419 [inline]
do_coredump+0x7cf/0x2bd0 fs/coredump.c:576
get_signal+0x11fd/0x14f0 kernel/signal.c:2919
arch_do_signal_or_restart+0x96/0x720 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x58/0xb0 kernel/entry/common.c:218
do_syscall_64+0x64/0xf0 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f25e314c799
RSP: 002b:00007f25e30d8218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 00000000000000ca RBX: 00007f25e31d63f8 RCX: 00007f25e314c799
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f25e31d63fc
RBP: 00007f25e31d63f0 R08: 0000000000000000 R09: 0000000000000000
R10: 00007ffe6f20b2f7 R11: 0000000000000246 R12: 00007f25e31a307c
R13: 000000000000006e R14: 00007ffe6f20b210 R15: 00007ffe6f20b2f8
</TASK>
INFO: task syz-executor327:313 blocked for more than 123 seconds.
Not tainted 6.12.30-syzkaller-gc40c54e66959 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor327 state:D stack:0 pid:313 tgid:303 ppid:299 flags:0x00004004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5924 [inline]
__schedule+0x145b/0x1f10 kernel/sched/core.c:7750
__schedule_loop kernel/sched/core.c:7831 [inline]
schedule+0xc6/0x240 kernel/sched/core.c:7846
schedule_timeout+0xb2/0x3a0 kernel/time/timer.c:2595
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common kernel/sched/completion.c:116 [inline]
wait_for_common+0x359/0x630 kernel/sched/completion.c:127
wait_for_completion_state+0x19/0x40 kernel/sched/completion.c:264
coredump_wait fs/coredump.c:419 [inline]
do_coredump+0x7cf/0x2bd0 fs/coredump.c:576
get_signal+0x11fd/0x14f0 kernel/signal.c:2919
arch_do_signal_or_restart+0x96/0x720 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x58/0xb0 kernel/entry/common.c:218
do_syscall_64+0x64/0xf0 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f25e314c799
RSP: 002b:00007f25e30d8218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 00000000000000ca RBX: 00007f25e31d63f8 RCX: 00007f25e314c799
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f25e31d63fc
RBP: 00007f25e31d63f0 R08: 0000000000000000 R09: 0000000000000000
R10: 00007ffe6f20b2f7 R11: 0000000000000246 R12: 00007f25e31a307c
R13: 000000000000006e R14: 00007ffe6f20b210 R15: 00007ffe6f20b2f8
</TASK>
INFO: task syz-executor327:312 blocked for more than 123 seconds.
Not tainted 6.12.30-syzkaller-gc40c54e66959 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor327 state:D stack:0 pid:312 tgid:304 ppid:300 flags:0x00004004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5924 [inline]
__schedule+0x145b/0x1f10 kernel/sched/core.c:7750
__schedule_loop kernel/sched/core.c:7831 [inline]
schedule+0xc6/0x240 kernel/sched/core.c:7846
schedule_timeout+0xb2/0x3a0 kernel/time/timer.c:2595
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common kernel/sched/completion.c:116 [inline]
wait_for_common+0x359/0x630 kernel/sched/completion.c:127
wait_for_completion_state+0x19/0x40 kernel/sched/completion.c:264
coredump_wait fs/coredump.c:419 [inline]
do_coredump+0x7cf/0x2bd0 fs/coredump.c:576
get_signal+0x11fd/0x14f0 kernel/signal.c:2919
arch_do_signal_or_restart+0x96/0x720 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x58/0xb0 kernel/entry/common.c:218
do_syscall_64+0x64/0xf0 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f25e314c799
RSP: 002b:00007f25e30d8218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 00000000000000ca RBX: 00007f25e31d63f8 RCX: 00007f25e314c799
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f25e31d63fc
RBP: 00007f25e31d63f0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f25e31a307c
R13: 000000000000006e R14: 00007ffe6f20b210 R15: 00007ffe6f20b2f8
</TASK>
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 37 Comm: khungtaskd Not tainted 6.12.30-syzkaller-gc40c54e66959 #0 d09897295957ba49fce5d3909215422667ca3e4a
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
<TASK>
__dump_stack+0x21/0x30 lib/dump_stack.c:94
dump_stack_lvl+0x10c/0x190 lib/dump_stack.c:120
dump_stack+0x19/0x20 lib/dump_stack.c:129
nmi_cpu_backtrace+0x2bf/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:229 [inline]
watchdog+0xd8f/0xed0 kernel/hung_task.c:385
kthread+0x2ca/0x370 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
</TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.12.30-syzkaller-gc40c54e66959 #0 d09897295957ba49fce5d3909215422667ca3e4a
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:pv_native_safe_halt+0x17/0x20 arch/x86/kernel/paravirt.c:106
Code: cc cc cc b8 92 3c d1 e8 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 73 bc 41 00 f3 0f 1e fa 55 48 89 e5 fb f4 <5d> e9 c3 59 02 00 cc cc cc b8 00 00 00 00 90 90 90 90 90 90 90 90
RSP: 0018:ffffffff87207da0 EFLAGS: 000002c6
RAX: ffff8881f6e00000 RBX: ffffffff87215540 RCX: ffffffff8585900e
RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000015334
RBP: ffffffff87207da0 R08: ffff8881f6e39733 R09: 1ffff1103edc72e6
R10: dffffc0000000000 R11: ffffed103edc72e7 R12: 1ffffffff0e42aa8
R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff87ca72e8
FS: 0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055555a94f370 CR3: 000000010b704000 CR4: 00000000003526b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
arch_safe_halt arch/x86/include/asm/paravirt.h:112 [inline]
default_idle+0x17/0x30 arch/x86/kernel/process.c:748
arch_cpu_idle+0xd/0x20 arch/x86/kernel/process.c:785
default_idle_call+0x3f/0x80 kernel/sched/idle.c:117
cpuidle_idle_call kernel/sched/idle.c:185 [inline]
do_idle+0x1a0/0x470 kernel/sched/idle.c:326
cpu_startup_entry+0x48/0x70 kernel/sched/idle.c:424
rest_init+0x10b/0x130 init/main.c:748
start_kernel+0x46a/0x4bb init/main.c:1135
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
</TASK>
| Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2025/07/02 17:26 | android16-6.12 | c40c54e66959 | bc80e4f0 | .config | strace log | report | syz / log | C | [disk image] [vmlinux] [kernel image] | ci2-android-6-12-rust | INFO: task hung in do_coredump | |
| 2025/07/02 13:56 | android16-6.12 | c40c54e66959 | bc80e4f0 | .config | strace log | report | syz / log | C | [disk image] [vmlinux] [kernel image] | ci2-android-6-12-rust | INFO: task hung in do_coredump | |
| 2025/07/02 10:41 | android16-6.12 | c40c54e66959 | bc80e4f0 | .config | strace log | report | syz / log | C | [disk image] [vmlinux] [kernel image] | ci2-android-6-12-rust | INFO: task hung in do_coredump | |
| 2025/07/02 07:20 | android16-6.12 | c40c54e66959 | bc80e4f0 | .config | strace log | report | syz / log | C | [disk image] [vmlinux] [kernel image] | ci2-android-6-12-rust | INFO: task hung in do_coredump | |
| 2025/07/11 12:08 | android16-6.12 | 5bbd30a60b96 | 3cda49cf | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-android-6-12-rust | INFO: task hung in do_coredump | ||
| 2025/07/05 08:33 | android16-6.12 | e2bf362ee23b | 4f67c4ae | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-android-6-12-rust | INFO: task hung in do_coredump | ||
| 2025/07/02 01:02 | android16-6.12 | 648383294760 | 091a06cd | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-android-6-12-rust | INFO: task hung in do_coredump |