INFO: task syz-executor.3:5542 blocked for more than 143 seconds.
Not tainted 6.7.0-rc1-next-20231117-syzkaller-01905-geff99d8edbed #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:27728 pid:5542 tgid:5541 ppid:5422 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5399 [inline]
__schedule+0xf15/0x5c00 kernel/sched/core.c:6726
__schedule_loop kernel/sched/core.c:6801 [inline]
schedule+0xe7/0x270 kernel/sched/core.c:6816
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6873
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0x5b4/0x9c0 kernel/locking/mutex.c:747
tty_open_by_driver drivers/tty/tty_io.c:2048 [inline]
tty_open+0x565/0x1010 drivers/tty/tty_io.c:2131
chrdev_open+0x26d/0x6e0 fs/char_dev.c:414
do_dentry_open+0x8d6/0x18c0 fs/open.c:948
do_open fs/namei.c:3624 [inline]
path_openat+0x1e55/0x2c50 fs/namei.c:3781
do_filp_open+0x1dc/0x430 fs/namei.c:3811
do_sys_openat2+0x176/0x1e0 fs/open.c:1440
do_sys_open fs/open.c:1455 [inline]
__do_sys_openat fs/open.c:1471 [inline]
__se_sys_openat fs/open.c:1466 [inline]
__x64_sys_openat+0x175/0x210 fs/open.c:1466
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x62/0x6a
RIP: 0033:0x7f4128878640
RSP: 002b:00007f4129ab1c00 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f4128878640
RDX: 0000000000000002 RSI: 00007f4129ab1ca0 RDI: 00000000ffffff9c
RBP: 00007f4129ab1ca0 R08: 0000000000000000 R09: 00007f4129ab1a16
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 000000000000000b R14: 00007f412898bf60 R15: 00007ffcb09093c8
INFO: task syz-executor.0:5546 blocked for more than 143 seconds.
Not tainted 6.7.0-rc1-next-20231117-syzkaller-01905-geff99d8edbed #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:27952 pid:5546 tgid:5545 ppid:5419 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5399 [inline]
__schedule+0xf15/0x5c00 kernel/sched/core.c:6726
__schedule_loop kernel/sched/core.c:6801 [inline]
schedule+0xe7/0x270 kernel/sched/core.c:6816
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6873
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0x5b4/0x9c0 kernel/locking/mutex.c:747
tty_open_by_driver drivers/tty/tty_io.c:2048 [inline]
tty_open+0x565/0x1010 drivers/tty/tty_io.c:2131
chrdev_open+0x26d/0x6e0 fs/char_dev.c:414
do_dentry_open+0x8d6/0x18c0 fs/open.c:948
do_open fs/namei.c:3624 [inline]
path_openat+0x1e55/0x2c50 fs/namei.c:3781
do_filp_open+0x1dc/0x430 fs/namei.c:3811
do_sys_openat2+0x176/0x1e0 fs/open.c:1440
do_sys_open fs/open.c:1455 [inline]
__do_sys_openat fs/open.c:1471 [inline]
__se_sys_openat fs/open.c:1466 [inline]
__x64_sys_openat+0x175/0x210 fs/open.c:1466
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x62/0x6a
RIP: 0033:0x7f880ac78640
RSP: 002b:00007f880be91c00 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f880ac78640
RDX: 0000000000000002 RSI: 00007f880be91ca0 RDI: 00000000ffffff9c
RBP: 00007f880be91ca0 R08: 0000000000000000 R09: 00007f880be91a16
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 000000000000000b R14: 00007f880ad8bf60 R15: 00007fffbaedcd08
INFO: task syz-executor.4:5548 blocked for more than 143 seconds.
Not tainted 6.7.0-rc1-next-20231117-syzkaller-01905-geff99d8edbed #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:27632 pid:5548 tgid:5547 ppid:5420 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5399 [inline]
__schedule+0xf15/0x5c00 kernel/sched/core.c:6726
__schedule_loop kernel/sched/core.c:6801 [inline]
schedule+0xe7/0x270 kernel/sched/core.c:6816
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6873
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0x5b4/0x9c0 kernel/locking/mutex.c:747
tty_open_by_driver drivers/tty/tty_io.c:2048 [inline]
tty_open+0x565/0x1010 drivers/tty/tty_io.c:2131
chrdev_open+0x26d/0x6e0 fs/char_dev.c:414
do_dentry_open+0x8d6/0x18c0 fs/open.c:948
do_open fs/namei.c:3624 [inline]
path_openat+0x1e55/0x2c50 fs/namei.c:3781
do_filp_open+0x1dc/0x430 fs/namei.c:3811
do_sys_openat2+0x176/0x1e0 fs/open.c:1440
do_sys_open fs/open.c:1455 [inline]
__do_sys_openat fs/open.c:1471 [inline]
__se_sys_openat fs/open.c:1466 [inline]
__x64_sys_openat+0x175/0x210 fs/open.c:1466
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x62/0x6a
RIP: 0033:0x7f083c878640
RSP: 002b:00007f083da02c00 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f083c878640
RDX: 0000000000000002 RSI: 00007f083da02ca0 RDI: 00000000ffffff9c
RBP: 00007f083da02ca0 R08: 0000000000000000 R09: 00007f083da02a16
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 000000000000000b R14: 00007f083c98bf60 R15: 00007ffc88124a18
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8cfad060 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
#0: ffffffff8cfad060 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]
#0: ffffffff8cfad060 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6613
2 locks held by kworker/u4:7/2459:
2 locks held by getty/4819:
#0: ffff8880272650a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc4/0x1490 drivers/tty/n_tty.c:2201
4 locks held by syz-executor.2/5537:
1 lock held by syz-executor.3/5542:
#0: ffffffff8db6ea48 (tty_mutex){+.+.}-{3:3}, at: tty_open_by_driver drivers/tty/tty_io.c:2048 [inline]
#0: ffffffff8db6ea48 (tty_mutex){+.+.}-{3:3}, at: tty_open+0x565/0x1010 drivers/tty/tty_io.c:2131
1 lock held by syz-executor.0/5546:
#0: ffffffff8db6ea48 (tty_mutex){+.+.}-{3:3}, at: tty_open_by_driver drivers/tty/tty_io.c:2048 [inline]
#0: ffffffff8db6ea48 (tty_mutex){+.+.}-{3:3}, at: tty_open+0x565/0x1010 drivers/tty/tty_io.c:2131
1 lock held by syz-executor.4/5548:
#0: ffffffff8db6ea48 (tty_mutex){+.+.}-{3:3}, at: tty_open_by_driver drivers/tty/tty_io.c:2048 [inline]
#0: ffffffff8db6ea48 (tty_mutex){+.+.}-{3:3}, at: tty_open+0x565/0x1010 drivers/tty/tty_io.c:2131
1 lock held by syz-executor.1/5759:
#0: ffffffff8db6ea48 (tty_mutex){+.+.}-{3:3}, at: tty_open_by_driver drivers/tty/tty_io.c:2048 [inline]
#0: ffffffff8db6ea48 (tty_mutex){+.+.}-{3:3}, at: tty_open+0x565/0x1010 drivers/tty/tty_io.c:2131
1 lock held by syz-executor.5/5796:
#0: ffffffff8db6ea48 (tty_mutex){+.+.}-{3:3}, at: tty_open_by_driver drivers/tty/tty_io.c:2048 [inline]
#0: ffffffff8db6ea48 (tty_mutex){+.+.}-{3:3}, at: tty_open+0x565/0x1010 drivers/tty/tty_io.c:2131
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.7.0-rc1-next-20231117-syzkaller-01905-geff99d8edbed #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x277/0x390 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x299/0x300 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+0xf86/0x1210 kernel/hung_task.c:379
kthread+0x2c1/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 2459 Comm: kworker/u4:7 Not tainted 6.7.0-rc1-next-20231117-syzkaller-01905-geff99d8edbed #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
Workqueue: bat_events batadv_nc_worker
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:26 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:67 [inline]
RIP: 0010:check_preemption_disabled+0x29/0xe0 lib/smp_processor_id.c:19
Code: 00 41 54 55 53 48 83 ec 08 65 8b 1d 1d 9d 82 75 65 8b 05 12 9d 82 75 a9 ff ff ff 7f 74 0b 48 83 c4 08 89 d8 5b 5d 41 5c c3 9c <58> f6 c4 02 74 ee 65 48 8b 05 e9 9c 82 75 f6 40 2f 04 48 89 fd 74
RSP: 0018:ffffc9000a98fa88 EFLAGS: 00000046
RAX: 0000000080000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8accc2a0 RDI: ffffffff8b2f1520
RBP: 0000000000000246 R08: 0000000000000000 R09: fffffbfff1e31c6a
R10: ffffffff8f18e357 R11: 0000000000000002 R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff8cfad060 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000562db0a67680 CR3: 000000001c914000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lockdep_recursion_inc kernel/locking/lockdep.c:462 [inline]
lock_acquire kernel/locking/lockdep.c:5752 [inline]
lock_acquire+0x172/0x530 kernel/locking/lockdep.c:5718
rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
rcu_read_lock include/linux/rcupdate.h:747 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
batadv_nc_worker+0x16e/0x10e0 net/batman-adv/network-coding.c:719
process_one_work+0x8a4/0x15f0 kernel/workqueue.c:2636
process_scheduled_works kernel/workqueue.c:2709 [inline]
worker_thread+0x8b6/0x1290 kernel/workqueue.c:2790
kthread+0x2c1/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242