INFO: task syz-executor374:5062 blocked for more than 143 seconds.
Not tainted 6.8.0-rc7-syzkaller-00020-g5847c9777c30 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor374 state:D stack:27856 pid:5062 tgid:5062 ppid:5059 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0xf12/0x5c60 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0xe9/0x280 kernel/sched/core.c:6817
coredump_task_exit kernel/exit.c:439 [inline]
do_exit+0x3e7/0x2ad0 kernel/exit.c:825
do_group_exit+0xd4/0x2a0 kernel/exit.c:1020
get_signal+0x23b9/0x2790 kernel/signal.c:2893
arch_do_signal_or_restart+0x90/0x7f0 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop kernel/entry/common.c:105 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:201 [inline]
syscall_exit_to_user_mode+0x14d/0x2a0 kernel/entry/common.c:212
do_syscall_64+0xe5/0x270 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7f97ebad4ab9
RSP: 002b:00007ffe3685ac48 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007ffe3685acf0 RCX: 00007f97ebad4ab9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f97ebb5f41c
RBP: 0000000000000006 R08: 0000000000000001 R09: 00007ffe3685ac80
R10: 00007ffe3685ac80 R11: 0000000000000246 R12: 0000000000012075
R13: 00000000000120a7 R14: 00007f97ebb5f41c R15: 00007f97ebb5f400
INFO: task syz-executor374:5064 blocked for more than 143 seconds.
Not tainted 6.8.0-rc7-syzkaller-00020-g5847c9777c30 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor374 state:D stack:29088 pid:5064 tgid:5062 ppid:5059 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0xf12/0x5c60 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0xe9/0x280 kernel/sched/core.c:6817
schedule_timeout+0x25b/0x2a0 kernel/time/timer.c:2159
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common+0x3e4/0x600 kernel/sched/completion.c:116
wait_for_common kernel/sched/completion.c:127 [inline]
wait_for_completion_state+0x1c/0x40 kernel/sched/completion.c:264
coredump_wait fs/coredump.c:414 [inline]
do_coredump+0x90c/0x3f80 fs/coredump.c:571
get_signal+0x2433/0x2790 kernel/signal.c:2879
arch_do_signal_or_restart+0x90/0x7f0 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop kernel/entry/common.c:105 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
irqentry_exit_to_user_mode+0x13c/0x280 kernel/entry/common.c:225
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0x7f97ebaa02a0
RSP: 002b:00007f97eba74220 EFLAGS: 00010217
RAX: 00007f97ebaa02a0 RBX: 00007f97ebb5f418 RCX: ffffffffffffffb0
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f97ebb5f418
RBP: 00007f97ebb5f410 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f97ebb5f41c
R13: 00007f97ebb2c194 R14: 00007f97ebb2c01d R15: 64663d736e617274
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8d7ad220 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#0: ffffffff8d7ad220 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
#0: ffffffff8d7ad220 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614
2 locks held by getty/4810:
#0: ffff88802a5490a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900015d02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfca/0x1490 drivers/tty/n_tty.c:2201
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc7-syzkaller-00020-g5847c9777c30 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xf87/0x1210 kernel/hung_task.c:379
kthread+0x2c6/0x3b0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:243
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 2847 Comm: kworker/u4:9 Not tainted 6.8.0-rc7-syzkaller-00020-g5847c9777c30 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:psi_task_switch+0xa8/0x900 kernel/sched/psi.c:942
Code: 02 84 c0 74 08 3c 03 0f 8e 22 07 00 00 48 8b 44 24 08 8b 90 a8 05 00 00 85 d2 0f 85 32 03 00 00 45 31 f6 48 8d bd a8 05 00 00 <48> b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 84
RSP: 0018:ffffc9000a617a00 EFLAGS: 00000002
RAX: ffff8880b9428a00 RBX: 0000000000000000 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff8d225a60 RDI: ffff88802b385ee8
RBP: ffff88802b385940 R08: 0000000000000004 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000000000 R14: ffffffff8d69b240 R15: fffffbfff1a44b4c
FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555569ee6680 CR3: 000000000d57a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
psi_sched_switch kernel/sched/stats.h:185 [inline]
__schedule+0x22b9/0x5c60 kernel/sched/core.c:6722
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0xe9/0x280 kernel/sched/core.c:6817
toggle_allocation_gate mm/kfence/core.c:828 [inline]
toggle_allocation_gate+0x1d7/0x250 mm/kfence/core.c:818
process_one_work+0x889/0x15e0 kernel/workqueue.c:2633
process_scheduled_works kernel/workqueue.c:2706 [inline]
worker_thread+0x8b9/0x12a0 kernel/workqueue.c:2787
kthread+0x2c6/0x3b0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:243
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.568 msecs