INFO: task syz-executor.4:31854 blocked for more than 143 seconds.
Not tainted 5.12.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:28520 pid:31854 ppid: 30996 flags:0x00000000
Call Trace:
context_switch kernel/sched/core.c:4322 [inline]
__schedule+0x911/0x21b0 kernel/sched/core.c:5073
schedule+0xcf/0x270 kernel/sched/core.c:5152
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5211
__mutex_lock_common kernel/locking/mutex.c:1026 [inline]
__mutex_lock+0x81f/0x1120 kernel/locking/mutex.c:1096
qrtr_endpoint_register+0x332/0x500 net/qrtr/qrtr.c:588
qrtr_tun_open+0x152/0x210 net/qrtr/tun.c:47
misc_open+0x372/0x4a0 drivers/char/misc.c:141
chrdev_open+0x266/0x770 fs/char_dev.c:414
do_dentry_open+0x4b9/0x11b0 fs/open.c:826
do_open fs/namei.c:3365 [inline]
path_openat+0x1c0e/0x27e0 fs/namei.c:3498
do_filp_open+0x17e/0x3c0 fs/namei.c:3525
do_sys_openat2+0x16d/0x420 fs/open.c:1187
do_sys_open fs/open.c:1203 [inline]
__do_sys_openat fs/open.c:1219 [inline]
__se_sys_openat fs/open.c:1214 [inline]
__x64_sys_openat+0x13f/0x1f0 fs/open.c:1214
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x466459
RSP: 002b:00007f0ba2f4a188 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000466459
RDX: 0000000000000000 RSI: 0000000020000000 RDI: ffffffffffffff9c
RBP: 00000000004bf9fb R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60
R13: 0000000000a9fb1f R14: 00007f0ba2f4a300 R15: 0000000000022000
INFO: task syz-executor.1:31872 blocked for more than 143 seconds.
Not tainted 5.12.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:28256 pid:31872 ppid: 31155 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4322 [inline]
__schedule+0x911/0x21b0 kernel/sched/core.c:5073
schedule+0xcf/0x270 kernel/sched/core.c:5152
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5211
__mutex_lock_common kernel/locking/mutex.c:1026 [inline]
__mutex_lock+0x81f/0x1120 kernel/locking/mutex.c:1096
misc_open+0x55/0x4a0 drivers/char/misc.c:107
chrdev_open+0x266/0x770 fs/char_dev.c:414
do_dentry_open+0x4b9/0x11b0 fs/open.c:826
do_open fs/namei.c:3365 [inline]
path_openat+0x1c0e/0x27e0 fs/namei.c:3498
do_filp_open+0x17e/0x3c0 fs/namei.c:3525
do_sys_openat2+0x16d/0x420 fs/open.c:1187
do_sys_open fs/open.c:1203 [inline]
__do_sys_openat fs/open.c:1219 [inline]
__se_sys_openat fs/open.c:1214 [inline]
__x64_sys_openat+0x13f/0x1f0 fs/open.c:1214
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x466459
RSP: 002b:00007ff429d29188 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 000000000056c008 RCX: 0000000000466459
RDX: 0000000000000000 RSI: 0000000020000000 RDI: ffffffffffffff9c
RBP: 00000000004bf9fb R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c008
R13: 0000000000a9fb1f R14: 00007ff429d29300 R15: 0000000000022000
INFO: task syz-executor.1:31887 blocked for more than 144 seconds.
Not tainted 5.12.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:27952 pid:31887 ppid: 31872 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4322 [inline]
__schedule+0x911/0x21b0 kernel/sched/core.c:5073
schedule+0xcf/0x270 kernel/sched/core.c:5152
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5211
__mutex_lock_common kernel/locking/mutex.c:1026 [inline]
__mutex_lock+0x81f/0x1120 kernel/locking/mutex.c:1096
misc_open+0x55/0x4a0 drivers/char/misc.c:107
chrdev_open+0x266/0x770 fs/char_dev.c:414
do_dentry_open+0x4b9/0x11b0 fs/open.c:826
do_open fs/namei.c:3365 [inline]
path_openat+0x1c0e/0x27e0 fs/namei.c:3498
do_filp_open+0x17e/0x3c0 fs/namei.c:3525
do_sys_openat2+0x16d/0x420 fs/open.c:1187
do_sys_open fs/open.c:1203 [inline]
__do_sys_openat fs/open.c:1219 [inline]
__se_sys_openat fs/open.c:1214 [inline]
__x64_sys_openat+0x13f/0x1f0 fs/open.c:1214
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x466459
RSP: 002b:00007ff429d08188 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 000000000056c0b0 RCX: 0000000000466459
RDX: 0000000000000000 RSI: 0000000020000000 RDI: ffffffffffffff9c
RBP: 00000000004bf9fb R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c0b0
R13: 0000000000a9fb1f R14: 00007ff429d08300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/1634:
#0: ffffffff8bf74320 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6327
1 lock held by in:imklog/8104:
#0: ffff88802578a870 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:961
2 locks held by agetty/8325:
#0: ffff88801abc7098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:266
#1: ffffc90000fa82e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xd5b/0x12f0 drivers/tty/n_tty.c:2178
2 locks held by kworker/u4:1/20022:
2 locks held by syz-executor.4/31728:
#0: ffff88807bcb11a0 (sk_lock-AF_QIPCRTR){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1600 [inline]
#0: ffff88807bcb11a0 (sk_lock-AF_QIPCRTR){+.+.}-{0:0}, at: qrtr_sendmsg+0x130/0x820 net/qrtr/qrtr.c:914
#1: ffffffff8dac8588 (qrtr_node_lock){+.+.}-{3:3}, at: qrtr_bcast_enqueue+0x2d/0x140 net/qrtr/qrtr.c:879
2 locks held by syz-executor.4/31854:
#0: ffffffff8c97bc88 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x55/0x4a0 drivers/char/misc.c:107
#1: ffffffff8dac8588 (qrtr_node_lock){+.+.}-{3:3}, at: qrtr_endpoint_register+0x332/0x500 net/qrtr/qrtr.c:588
1 lock held by syz-executor.1/31872:
#0: ffffffff8c97bc88 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x55/0x4a0 drivers/char/misc.c:107
1 lock held by syz-executor.1/31887:
#0: ffffffff8c97bc88 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x55/0x4a0 drivers/char/misc.c:107
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 1634 Comm: khungtaskd Not tainted 5.12.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:79 [inline]
dump_stack+0x141/0x1d7 lib/dump_stack.c:120
nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105
nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline]
watchdog+0xd48/0xfb0 kernel/hung_task.c:294
kthread+0x3b1/0x4a0 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4817 Comm: systemd-journal Not tainted 5.12.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:check_preemption_disabled+0x3e/0x150 lib/smp_processor_id.c:60
Code: 44 8b 25 dd bd fe 76 65 8b 1d 2e 18 ff 76 81 e3 ff ff ff 7f 31 ff 89 de 0f 1f 44 00 00 85 db 74 11 0f 1f 44 00 00 44 89 e0 5b <5d> 41 5c 41 5d 41 5e c3 0f 1f 44 00 00 9c 5b 81 e3 00 02 00 00 31
RSP: 0018:ffffc900013afd28 EFLAGS: 00000046
RAX: 0000000000000001 RBX: ffffffff8dc549cc RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffffff89c21980 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000001
R13: ffffffff896b97e0 R14: ffff888025328000 R15: 0000000000000cc0
FS: 00007f445904e8c0(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4456569000 CR3: 000000001b4a6000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lockdep_recursion_inc kernel/locking/lockdep.c:432 [inline]
lock_release+0x15a/0x720 kernel/locking/lockdep.c:5529
might_alloc include/linux/sched/mm.h:194 [inline]
slab_pre_alloc_hook mm/slab.h:497 [inline]
slab_alloc_node mm/slub.c:2826 [inline]
slab_alloc mm/slub.c:2915 [inline]
kmem_cache_alloc+0x3e/0x370 mm/slub.c:2920
prepare_creds+0x3b/0x730 kernel/cred.c:258
access_override_creds fs/open.c:355 [inline]
do_faccessat+0x3f4/0x850 fs/open.c:419
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f44583099c7
Code: 83 c4 08 48 3d 01 f0 ff ff 73 01 c3 48 8b 0d c8 d4 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 15 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a1 d4 2b 00 f7 d8 64 89 01 48
RSP: 002b:00007ffc097bf498 EFLAGS: 00000246 ORIG_RAX: 0000000000000015
RAX: ffffffffffffffda RBX: 00007ffc097c23b0 RCX: 00007f44583099c7
RDX: 00007f4458d7aa00 RSI: 0000000000000000 RDI: 0000560b46e399a3
RBP: 00007ffc097bf4d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ffc097c23b0 R15: 00007ffc097bf9c0