INFO: task syz.4.1142:9925 blocked for more than 160 seconds.
Not tainted 6.12.0-rc6-syzkaller-01362-ga58f00ed24b8 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.1142 state:D stack:25840 pid:9925 tgid:9922 ppid:5838 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x184f/0x4c30 kernel/sched/core.c:6690
__schedule_loop kernel/sched/core.c:6767 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6782
__lock_sock+0x1cd/0x330 net/core/sock.c:3053
lock_sock_nested+0x9e/0x100 net/core/sock.c:3621
lock_sock include/net/sock.h:1617 [inline]
sctp_ioctl+0x2f/0x1f0 net/sctp/socket.c:4916
sock_ioctl_out net/core/sock.c:4288 [inline]
sk_ioctl+0x31f/0x680 net/core/sock.c:4316
inet_ioctl+0x42f/0x4f0 net/ipv4/af_inet.c:1005
sock_do_ioctl+0x158/0x460 net/socket.c:1227
sock_ioctl+0x626/0x8e0 net/socket.c:1346
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:907 [inline]
__se_sys_ioctl+0xf9/0x170 fs/ioctl.c:893
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7efeb4d7e719
RSP: 002b:00007efeb5ae6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007efeb4f36058 RCX: 00007efeb4d7e719
RDX: 0000000020000f40 RSI: 0000000000008933 RDI: 0000000000000009
RBP: 00007efeb4df1616 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007efeb4f36058 R15: 00007ffcd8df8d28
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e937da0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e937da0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e937da0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6720
5 locks held by dhcpcd/5509:
2 locks held by getty/5592:
#0: ffff888030c7d0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900032432f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
1 lock held by syz-executor/5827:
1 lock held by syz-executor/9769:
2 locks held by syz.4.1142/9923:
1 lock held by syz.4.1142/9925:
#0: ffff8880119fa458 (sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1617 [inline]
#0: ffff8880119fa458 (sk_lock-AF_INET){+.+.}-{0:0}, at: sctp_ioctl+0x2f/0x1f0 net/sctp/socket.c:4916
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc6-syzkaller-01362-ga58f00ed24b8 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xff4/0x1040 kernel/hung_task.c:379
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
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: 9769 Comm: syz-executor Not tainted 6.12.0-rc6-syzkaller-01362-ga58f00ed24b8 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
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:737
Code: fa 31 8e 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 ac d6 83 00 48 c7 c3 98 7e 03 00 49 03 1e 48 89 d8 48 c1 e8 03 <42> 0f b6 04 38 84 c0 75 22 8b 03 65 ff 0d b1 0d 89 7e 74 10 83 e0
RSP: 0018:ffffc90004837c30 EFLAGS: 00000802
RAX: 1ffff110170e6fd3 RBX: ffff8880b8737e98 RCX: ffffffff815a6237
RDX: ffff88802c5f3c00 RSI: ffffffff8c610a80 RDI: ffffffff8c610a40
RBP: 0000000000000001 R08: ffffffff815a625d R09: 1ffffffff203acfd
R10: dffffc0000000000 R11: fffffbfff203acfe R12: 0000000000000011
R13: ffff88802c5f4538 R14: ffffffff8e31fa58 R15: dffffc0000000000
FS: 000055558953c500(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000556ccff16680 CR3: 0000000060034000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
trace_signal_deliver+0x87/0x210 include/trace/events/signal.h:96
get_signal+0x69b/0x1740 kernel/signal.c:2812
arch_do_signal_or_restart+0x96/0x860 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+0xc9/0x370 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f30313804e4
Code: 89 4c 24 1c e8 ed 5a 02 00 44 8b 54 24 1c 8b 3c 24 45 31 c9 89 c5 48 8b 54 24 10 48 8b 74 24 08 45 31 c0 b8 2d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 34 89 ef 48 89 04 24 e8 39 5b 02 00 48 8b 04
RSP: 002b:00007fff39de2380 EFLAGS: 00000246
RAX: 0000000000000024 RBX: 00007f3032064620 RCX: 00007f30313804e4
RDX: 0000000000001000 RSI: 00007f3032064670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003
R13: 0000000000000000 R14: 00007f3032064670 R15: 0000000000000000