INFO: task syz.6.4146:24724 blocked for more than 143 seconds.
Not tainted 6.14.0-rc6-syzkaller-00022-gb7f94fcf5546 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.4146 state:D stack:28416 pid:24724 tgid:24723 ppid:22173 task_flags:0x400640 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5378 [inline]
__schedule+0xf43/0x5890 kernel/sched/core.c:6765
__schedule_loop kernel/sched/core.c:6842 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6857
schedule_timeout+0x244/0x280 kernel/time/sleep_timeout.c:75
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common+0x3e1/0x600 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:419 [inline]
do_coredump+0x86f/0x4410 fs/coredump.c:576
get_signal+0x230b/0x26c0 kernel/signal.c:3021
arch_do_signal_or_restart+0x90/0x7e0 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:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x150/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0382e4e750
RSP: 002b:00007f0383d253f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000000 RBX: 00007f03831a5fa8 RCX: 00007f0382f8d169
RDX: 00007f0383d25400 RSI: 00007f0383d25530 RDI: 000000000000000b
RBP: 00007f03831a5fa0 R08: 00007f0383d27000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 00007f03831a5fac
R13: 0000000000000000 R14: 00007fffe842dc10 R15: 00007fffe842dcf8
Showing all locks held in the system:
1 lock held by pool_workqueue_/3:
#0: ffffffff8e1c85b8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock+0x282/0x3b0 kernel/rcu/tree_exp.h:302
1 lock held by khungtaskd/31:
#0: ffffffff8e1bd140 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e1bd140 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e1bd140 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x7f/0x390 kernel/locking/lockdep.c:6746
2 locks held by getty/5573:
#0: ffff88814cdc30a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc90002fde2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0xfba/0x1480 drivers/tty/n_tty.c:2211
1 lock held by syz-executor/24898:
#0: ffff8880b863ec18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:606 [inline]
#0: ffff8880b863ec18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x7e/0x130 kernel/sched/core.c:591
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.14.0-rc6-syzkaller-00022-gb7f94fcf5546 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
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:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:236 [inline]
watchdog+0xf62/0x12b0 kernel/hung_task.c:399
kthread+0x3af/0x750 kernel/kthread.c:464
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 5804 Comm: syz-executor Not tainted 6.14.0-rc6-syzkaller-00022-gb7f94fcf5546 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:debug_spin_lock_before kernel/locking/spinlock_debug.c:86 [inline]
RIP: 0010:do_raw_spin_lock+0x72/0x2c0 kernel/locking/spinlock_debug.c:115
Code: 05 00 c7 02 f1 f1 f1 f1 c7 42 04 04 f3 f3 f3 65 48 8b 14 25 28 00 00 00 48 89 54 24 60 31 d2 48 89 fa 48 c1 ea 03 0f b6 14 02 <48> 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 e5 01 00 00 8b
RSP: 0018:ffffc90000a287f0 EFLAGS: 00000a03
RAX: dffffc0000000000 RBX: ffff8880452096e0 RCX: ffffffff8195c6ae
RDX: 0000000000000000 RSI: ffffffff8b6cff80 RDI: ffff8880452096e4
RBP: 1ffff920001450ff R08: 0000000000000000 R09: fffffbfff2dd91b9
R10: ffffffff96ec8dcf R11: 0000000000000002 R12: ffffc90000a28b70
R13: 0000000000000080 R14: ffffc90000a28d30 R15: ffffc90000a28d30
FS: 0000555569628500(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd5a8d79178 CR3: 00000000129fe000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000093
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
spin_lock_bh include/linux/spinlock.h:356 [inline]
ieee80211_rx_handlers+0xcf/0x98b0 net/mac80211/rx.c:4193
ieee80211_invoke_rx_handlers net/mac80211/rx.c:4257 [inline]
ieee80211_prepare_and_rx_handle+0x2c4a/0x6fd0 net/mac80211/rx.c:5107
ieee80211_rx_for_interface+0x10a/0x1f0 net/mac80211/rx.c:5192
__ieee80211_rx_handle_packet net/mac80211/rx.c:5348 [inline]
ieee80211_rx_list+0x10d4/0x2970 net/mac80211/rx.c:5483
ieee80211_rx_napi+0xdd/0x400 net/mac80211/rx.c:5506
ieee80211_rx include/net/mac80211.h:5172 [inline]
ieee80211_handle_queued_frames+0xd5/0x130 net/mac80211/main.c:441
tasklet_action_common+0x251/0x3f0 kernel/softirq.c:811
handle_softirqs+0x213/0x8f0 kernel/softirq.c:561
do_softirq kernel/softirq.c:462 [inline]
do_softirq+0xb2/0xf0 kernel/softirq.c:449
__local_bh_enable_ip+0x100/0x120 kernel/softirq.c:389
lock_sock include/net/sock.h:1624 [inline]
tcp_recvmsg+0x113/0x680 net/ipv4/tcp.c:2864
inet_recvmsg+0x12b/0x6a0 net/ipv4/af_inet.c:883
sock_recvmsg_nosec net/socket.c:1023 [inline]
sock_recvmsg+0x1b2/0x250 net/socket.c:1045
sock_read_iter+0x2bb/0x3b0 net/socket.c:1115
new_sync_read fs/read_write.c:484 [inline]
vfs_read+0xa53/0xbf0 fs/read_write.c:565
ksys_read+0x207/0x250 fs/read_write.c:708
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5a30b8bb3d
Code: a8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb b5 e8 a8 48 00 00 0f 1f 84 00 00 00 00 00 80 3d 01 1a 1f 00 00 74 17 31 c0 0f 05 <48> 3d 00 f0 ff ff 77 5b c3 66 2e 0f 1f 84 00 00 00 00 00 48 83 ec
RSP: 002b:00007ffd6d9c2188 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f5a30b8bb3d
RDX: 0000000000000004 RSI: 00007ffd6d9c219c RDI: 0000000000000003
RBP: 0000000000000000 R08: 00000000000489a8 R09: 00007f5a318f6000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd6d9c25b0
R13: 0000000000000004 R14: 00007ffd6d9c219c R15: 00007ffd6d9c2230