INFO: task syz.1.49:5482 blocked for more than 143 seconds.
Not tainted 6.11.0-rc3-syzkaller-00483-g1bf8e07c382b #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.49 state:D stack:24672 pid:5482 tgid:5482 ppid:5229 flags:0x00000000
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0x1800/0x4a60 kernel/sched/core.c:6529
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6621
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678
__mutex_lock_common kernel/locking/mutex.c:684 [inline]
__mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752
pipe_release+0x4e/0x330 fs/pipe.c:727
__fput+0x24a/0x8a0 fs/file_table.c:422
task_work_run+0x24f/0x310 kernel/task_work.c:228
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:114 [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+0x168/0x370 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9f3a579e79
RSP: 002b:00007fffb3a9d508 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f9f3a717a80 RCX: 00007f9f3a579e79
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f9f3a717a80 R08: 0000000000000006 R09: 00007fffb3a9d7ef
R10: 000000000003fccc R11: 0000000000000246 R12: 0000000000014d95
R13: 00007fffb3a9d600 R14: 00007fffb3a9d620 R15: ffffffffffffffff
INFO: task syz.1.49:5486 blocked for more than 145 seconds.
Not tainted 6.11.0-rc3-syzkaller-00483-g1bf8e07c382b #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.49 state:D stack:27392 pid:5486 tgid:5482 ppid:5229 flags:0x00000000
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0x1800/0x4a60 kernel/sched/core.c:6529
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6621
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678
__mutex_lock_common kernel/locking/mutex.c:684 [inline]
__mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752
pipe_write+0x1c9/0x1a40 fs/pipe.c:455
new_sync_write fs/read_write.c:497 [inline]
vfs_write+0xa72/0xc90 fs/read_write.c:590
ksys_write+0x1a0/0x2c0 fs/read_write.c:643
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: 0033:0x7f9f3a579e79
RSP: 002b:00007f9f3b363038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f9f3a716130 RCX: 00007f9f3a579e79
RDX: 000000000000fdef RSI: 0000000020000240 RDI: 0000000000000016
RBP: 00007f9f3a5e7916 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f9f3a716130 R15: 00007fffb3a9d3a8
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e9382e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
#0: ffffffff8e9382e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
#0: ffffffff8e9382e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6626
2 locks held by udevd/4681:
2 locks held by getty/4984:
#0: ffff88802f66a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000312b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ac/0x1e00 drivers/tty/n_tty.c:2211
1 lock held by syz.1.49/5482:
#0: ffff88801c2c0868 (&pipe->mutex){+.+.}-{3:3}, at: pipe_release+0x4e/0x330 fs/pipe.c:727
1 lock held by syz.1.49/5485:
#0: ffff88801c2c0868 (&pipe->mutex){+.+.}-{3:3}, at: splice_file_to_pipe+0x2e/0x500 fs/splice.c:1292
1 lock held by syz.1.49/5486:
#0: ffff88801c2c0868 (&pipe->mutex){+.+.}-{3:3}, at: pipe_write+0x1c9/0x1a40 fs/pipe.c:455
2 locks held by dhcpcd/5589:
#0: ffff888077f63e08 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:799 [inline]
#0: ffff888077f63e08 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: __sock_release net/socket.c:658 [inline]
#0: ffff888077f63e08 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: sock_close+0x90/0x240 net/socket.c:1421
#1: ffffffff8e93d6b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:296 [inline]
#1: ffffffff8e93d6b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x381/0x830 kernel/rcu/tree_exp.h:958
2 locks held by dhcpcd/5590:
#0: ffff88807b8a6258 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1607 [inline]
#0: ffff88807b8a6258 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x32/0xcb0 net/packet/af_packet.c:3266
#1: ffffffff8e93d6b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:328 [inline]
#1: ffffffff8e93d6b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x451/0x830 kernel/rcu/tree_exp.h:958
1 lock held by dhcpcd/5591:
#0: ffff88805ac96258 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1607 [inline]
#0: ffff88805ac96258 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x32/0xcb0 net/packet/af_packet.c:3266
1 lock held by dhcpcd/5592:
#0: ffff88807a00c258 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1607 [inline]
#0: ffff88807a00c258 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x32/0xcb0 net/packet/af_packet.c:3266
1 lock held by dhcpcd/5593:
#0: ffff88807af42258 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1607 [inline]
#0: ffff88807af42258 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x32/0xcb0 net/packet/af_packet.c:3266
1 lock held by dhcpcd/5594:
#0: ffff88807991a258 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1607 [inline]
#0: ffff88807991a258 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x32/0xcb0 net/packet/af_packet.c:3266
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-rc3-syzkaller-00483-g1bf8e07c382b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call Trace:
__dump_stack lib/dump_stack.c:93 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119
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+0xfee/0x1030 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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 101 PID: 5040 Comm: dhcpcd Not tainted 6.11.0-rc3-syzkaller-00483-g1bf8e07c382b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:__set_current_blocked+0x319/0x380 kernel/signal.c:3108
Code: 00 00 fc ff df 48 8b 4c 24 30 80 3c 01 00 74 08 4c 89 ef e8 69 60 a0 00 49 8b 7d 00 e8 00 78 66 0a 48 c7 44 24 40 0e 36 e0 45 <48> b8 00 00 00 00 00 fc ff df 48 8b 4c 24 38 48 c7 04 08 00 00 00
RSP: 0018:ffffc900031b7b80 EFLAGS: 00000286
RAX: 0000000080000000 RBX: ffff88801af80920 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: ffffffff8c0ad560 RDI: 0000000000000001
RBP: ffffc900031b7c50 R08: ffffffff9017dd6f R09: 1ffffffff202fbad
R10: dffffc0000000000 R11: fffffbfff202fbae R12: 1ffff110035f0124
R13: ffff88801af80918 R14: 0000000000010000 R15: ffff88801af80000
FS: 00007f39757f4740(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055bec8fa5680 CR3: 000000002dcd4000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
set_current_blocked kernel/signal.c:3091 [inline]
signal_delivered kernel/signal.c:2953 [inline]
signal_setup_done+0x39e/0x600 kernel/signal.c:2965
handle_signal arch/x86/kernel/signal.c:285 [inline]
arch_do_signal_or_restart+0x51f/0x860 arch/x86/kernel/signal.c:312
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: 0033:0x55bec8f63f1a
Code: ff 80 bd a0 01 00 00 03 74 bc 48 8d 3d 74 a3 02 00 31 c0 e8 d0 12 00 00 eb ac 48 81 c4 a0 00 00 00 5b 5d 41 5c 41 5d 41 5e c3 <48> 8b 05 df 06 04 00 48 83 f8 05 74 1c 48 8b 05 d2 06 04 00 48 8d
RSP: 002b:00007ffd65135d78 EFLAGS: 00000246 ORIG_RAX: 000000000000010f
RAX: 0000000000000000 RBX: 000055bed82e2e20 RCX: 00007f39758c1ad5
RDX: 00007ffd65135d80 RSI: 00007ffd65135eb0 RDI: 0000000000000011
RBP: 00007ffd65136660 R08: 0000000000000008 R09: 0000000000000000
R10: 00007ffd65136660 R11: 0000000000000246 R12: 0000000000000000
R13: 000055bec8fa4610 R14: 00000000ffffffff R15: 0000000000000000