INFO: task syz-executor415:6306 blocked for more than 143 seconds.
Not tainted 6.17.0-rc1-next-20250814-syzkaller #0
Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor415 state:D stack:26344 pid:6306 tgid:6305 ppid:5884 task_flags:0x400548 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5357 [inline]
__schedule+0x1798/0x4cc0 kernel/sched/core.c:6961
__schedule_loop kernel/sched/core.c:7043 [inline]
schedule+0x165/0x360 kernel/sched/core.c:7058
schedule_timeout+0x9a/0x270 kernel/time/sleep_timeout.c:75
do_wait_for_common kernel/sched/completion.c:100 [inline]
__wait_for_common kernel/sched/completion.c:121 [inline]
wait_for_common kernel/sched/completion.c:132 [inline]
wait_for_completion+0x2bf/0x5d0 kernel/sched/completion.c:153
io_wq_exit_workers io_uring/io-wq.c:1327 [inline]
io_wq_put_and_exit+0x316/0x650 io_uring/io-wq.c:1355
io_uring_clean_tctx+0x11f/0x1a0 io_uring/tctx.c:203
io_uring_cancel_generic+0x6ca/0x7d0 io_uring/io_uring.c:3272
io_uring_files_cancel include/linux/io_uring.h:19 [inline]
do_exit+0x345/0x2300 kernel/exit.c:907
do_group_exit+0x21c/0x2d0 kernel/exit.c:1102
get_signal+0x1286/0x1340 kernel/signal.c:3034
arch_do_signal_or_restart+0x9a/0x750 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop+0x75/0x110 kernel/entry/common.c:40
exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7ba9d6e419
RSP: 002b:00007f7ba9d24218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f7ba9df5328 RCX: 00007f7ba9d6e419
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f7ba9df5328
RBP: 00007f7ba9df5320 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7ba9dc2074
R13: 0000000000000000 R14: 0000200000000200 R15: 00007fffabf1f1a8
INFO: task syz-executor415:6316 blocked for more than 145 seconds.
Not tainted 6.17.0-rc1-next-20250814-syzkaller #0
Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor415 state:D stack:25384 pid:6316 tgid:6311 ppid:5881 task_flags:0x400548 flags:0x00024002
Call Trace:
context_switch kernel/sched/core.c:5357 [inline]
__schedule+0x1798/0x4cc0 kernel/sched/core.c:6961
__schedule_loop kernel/sched/core.c:7043 [inline]
schedule+0x165/0x360 kernel/sched/core.c:7058
schedule_timeout+0x9a/0x270 kernel/time/sleep_timeout.c:75
do_wait_for_common kernel/sched/completion.c:100 [inline]
__wait_for_common kernel/sched/completion.c:121 [inline]
wait_for_common kernel/sched/completion.c:132 [inline]
wait_for_completion+0x2bf/0x5d0 kernel/sched/completion.c:153
io_wq_exit_workers io_uring/io-wq.c:1327 [inline]
io_wq_put_and_exit+0x316/0x650 io_uring/io-wq.c:1355
io_uring_clean_tctx+0x11f/0x1a0 io_uring/tctx.c:203
io_uring_cancel_generic+0x6ca/0x7d0 io_uring/io_uring.c:3272
io_uring_files_cancel include/linux/io_uring.h:19 [inline]
do_exit+0x345/0x2300 kernel/exit.c:907
do_group_exit+0x21c/0x2d0 kernel/exit.c:1102
get_signal+0x1286/0x1340 kernel/signal.c:3034
arch_do_signal_or_restart+0x9a/0x750 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop+0x75/0x110 kernel/entry/common.c:40
exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7ba9d6e419
RSP: 002b:00007f7ba9d03218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000000 RBX: 00007f7ba9df5338 RCX: 00007f7ba9d6e419
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f7ba9df533c
RBP: 00007f7ba9df5330 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7ba9dc2074
R13: 0000000000000003 R14: 0000200000000200 R15: 0000200000000640
INFO: task syz-executor415:6383 blocked for more than 147 seconds.
Not tainted 6.17.0-rc1-next-20250814-syzkaller #0
Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor415 state:D stack:27600 pid:6383 tgid:6382 ppid:5878 task_flags:0x400548 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5357 [inline]
__schedule+0x1798/0x4cc0 kernel/sched/core.c:6961
__schedule_loop kernel/sched/core.c:7043 [inline]
schedule+0x165/0x360 kernel/sched/core.c:7058
schedule_timeout+0x9a/0x270 kernel/time/sleep_timeout.c:75
do_wait_for_common kernel/sched/completion.c:100 [inline]
__wait_for_common kernel/sched/completion.c:121 [inline]
wait_for_common kernel/sched/completion.c:132 [inline]
wait_for_completion+0x2bf/0x5d0 kernel/sched/completion.c:153
io_wq_exit_workers io_uring/io-wq.c:1327 [inline]
io_wq_put_and_exit+0x316/0x650 io_uring/io-wq.c:1355
io_uring_clean_tctx+0x11f/0x1a0 io_uring/tctx.c:203
io_uring_cancel_generic+0x6ca/0x7d0 io_uring/io_uring.c:3272
io_uring_files_cancel include/linux/io_uring.h:19 [inline]
do_exit+0x345/0x2300 kernel/exit.c:907
do_group_exit+0x21c/0x2d0 kernel/exit.c:1102
get_signal+0x1286/0x1340 kernel/signal.c:3034
arch_do_signal_or_restart+0x9a/0x750 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop+0x75/0x110 kernel/entry/common.c:40
exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7ba9d6e419
RSP: 002b:00007f7ba9d24218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f7ba9df5328 RCX: 00007f7ba9d6e419
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f7ba9df532c
RBP: 00007f7ba9df5320 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7ba9dc2074
R13: 0000000000000000 R14: 0000200000000200 R15: 00007fffabf1f1a8
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.17.0-rc1-next-20250814-syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
nmi_cpu_backtrace+0x39e/0x3d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:332 [inline]
watchdog+0xf60/0xfa0 kernel/hung_task.c:495
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x3f9/0x770 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 6843 Comm: iou-wrk-6840 Not tainted 6.17.0-rc1-next-20250814-syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:arch_atomic_read arch/x86/include/asm/atomic.h:23 [inline]
RIP: 0010:raw_atomic_read include/linux/atomic/atomic-arch-fallback.h:457 [inline]
RIP: 0010:rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline]
RIP: 0010:rcu_is_watching+0x55/0xb0 kernel/rcu/tree.c:751
Code: 4d be 8d 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 dc c5 7c 00 48 c7 c3 98 3f a2 92 49 03 1e 48 89 d8 48 c1 e8 03 <42> 0f b6 04 38 84 c0 75 34 8b 03 65 ff 0d e9 b1 fa 10 74 11 83 e0
RSP: 0018:ffffc9000b157410 EFLAGS: 00000806
RAX: 1ffff110170c65f3 RBX: ffff8880b8632f98 RCX: 0c1d8eae21410900
RDX: ffff88802756bc00 RSI: ffffffff8be34be0 RDI: ffffffff8be34ba0
RBP: ffffc9000b157538 R08: ffffffff8fa3b137 R09: 1ffffffff1f47626
R10: dffffc0000000000 R11: fffffbfff1f47627 R12: 1ffff9200162ae90
R13: dffffc0000000000 R14: ffffffff8dbe4d10 R15: dffffc0000000000
FS: 00007f7ba9d246c0(0000) GS:ffff888125c0f000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000594000 CR3: 000000007e194000 CR4: 00000000003526f0
Call Trace:
trace_csd_function_entry+0x76/0x1d0 include/trace/events/csd.h:59
csd_do_func kernel/smp.c:135 [inline]
generic_exec_single+0x22c/0x500 kernel/smp.c:439
smp_call_function_single_async+0x79/0x110 kernel/smp.c:732
rdmsr_safe_on_cpu+0x127/0x230 arch/x86/lib/msr-smp.c:179
msr_read+0x14d/0x250 arch/x86/kernel/msr.c:66
loop_rw_iter+0x425/0x660 include/linux/uio.h:-1
io_iter_do_read io_uring/rw.c:830 [inline]
__io_read+0x1326/0x14f0 io_uring/rw.c:941
io_read+0x1c/0x60 io_uring/rw.c:1020
__io_issue_sqe+0x17e/0x4b0 io_uring/io_uring.c:1773
io_issue_sqe+0x165/0xfd0 io_uring/io_uring.c:1796
io_wq_submit_work+0x6e9/0xb90 io_uring/io_uring.c:1908
io_worker_handle_work+0x7cd/0x1180 io_uring/io-wq.c:650
io_wq_worker+0x42f/0xeb0 io_uring/io-wq.c:704
ret_from_fork+0x3f9/0x770 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245