INFO: task syz-executor.0:11840 blocked for more than 143 seconds.
Not tainted 5.19.0-rc2-syzkaller-00302-g05c6ca8512f2 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:28408 pid:11840 ppid: 3650 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5146 [inline]
__schedule+0xa00/0x4b50 kernel/sched/core.c:6458
schedule+0xd2/0x1f0 kernel/sched/core.c:6530
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6589
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0xa70/0x1350 kernel/locking/mutex.c:747
misc_open+0x5f/0x4a0 drivers/char/misc.c:107
chrdev_open+0x266/0x770 fs/char_dev.c:414
do_dentry_open+0x4a1/0x11f0 fs/open.c:848
do_open fs/namei.c:3520 [inline]
path_openat+0x1c71/0x2910 fs/namei.c:3653
do_filp_open+0x1aa/0x400 fs/namei.c:3680
do_sys_openat2+0x16d/0x4c0 fs/open.c:1278
do_sys_open fs/open.c:1294 [inline]
__do_sys_openat fs/open.c:1310 [inline]
__se_sys_openat fs/open.c:1305 [inline]
__x64_sys_openat+0x13f/0x1f0 fs/open.c:1305
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7f9c3a689109
RSP: 002b:00007f9c3b878168 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f9c3a79bf60 RCX: 00007f9c3a689109
RDX: 0000000000000000 RSI: 0000000020000480 RDI: ffffffffffffff9c
RBP: 00007f9c3a6e305d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9c3accfb1f R14: 00007f9c3b878300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8bd86ba0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6491
3 locks held by kworker/u4:5/1090:
#0: ffff8880b9b39f18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:544
#1: ffff8880b9b277c8 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x3e7/0x4e0 kernel/sched/psi.c:889
#2: ffff888073db0d40 (&wdev->mtx){+.+.}-{3:3}, at: sdata_lock net/mac80211/ieee80211_i.h:1040 [inline]
#2: ffff888073db0d40 (&wdev->mtx){+.+.}-{3:3}, at: ieee80211_ibss_work+0x90/0xe80 net/mac80211/ibss.c:1681
2 locks held by getty/3292:
#0: ffff88807f9e8098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc90002d162e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xe50/0x13c0 drivers/tty/n_tty.c:2124
6 locks held by kworker/1:4/3682:
#0: ffff88801740bd38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff88801740bd38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff88801740bd38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff88801740bd38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff88801740bd38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff88801740bd38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc90003ddfda8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffff888147b0f190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline]
#2: ffff888147b0f190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c1/0x4690 drivers/usb/core/hub.c:5691
#3: ffff8880174d6190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline]
#3: ffff8880174d6190 (&dev->mutex){....}-{3:3}, at: __device_attach+0x76/0x530 drivers/base/dd.c:964
#4: ffff8880174d0118 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline]
#4: ffff8880174d0118 (&dev->mutex){....}-{3:3}, at: __device_attach+0x76/0x530 drivers/base/dd.c:964
#5: ffffffff8bc471b0 (umhelper_sem){++++}-{3:3}, at: usermodehelper_read_trylock+0xba/0x2e0 kernel/umh.c:217
2 locks held by syz-executor.1/11830:
#0: ffffffff8c82eb08 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x5f/0x4a0 drivers/char/misc.c:107
#1: ffffffff8bc53828 (system_transition_mutex){+.+.}-{3:3}, at: snapshot_open+0x3b/0x2a0 kernel/power/user.c:54
1 lock held by syz-executor.0/11840:
#0: ffffffff8c82eb08 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x5f/0x4a0 drivers/char/misc.c:107
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 5.19.0-rc2-syzkaller-00302-g05c6ca8512f2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1e6/0x230 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0xc22/0xf90 kernel/hung_task.c:378
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 2960 Comm: syslogd Not tainted 5.19.0-rc2-syzkaller-00302-g05c6ca8512f2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:check_kcov_mode kernel/kcov.c:166 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x7/0x60 kernel/kcov.c:200
Code: 4c 00 5d be 03 00 00 00 e9 d6 be 81 02 66 0f 1f 44 00 00 48 8b be a8 01 00 00 e8 b4 ff ff ff 31 c0 c3 90 65 8b 05 b9 f9 87 7e <89> c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b 14 25 80 6f 02 00 a9
RSP: 0018:ffffc9000dba7948 EFLAGS: 00000202
RAX: 0000000080000000 RBX: 000000000000008a RCX: ffffffff81d32027
RDX: ffff88807fa6d880 RSI: 0000000000000000 RDI: 0000000000000001
RBP: ffff88807ef8e08a R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: ffff88807ef8e000
R13: 0000000000000001 R14: ffffea0001fbe300 R15: 0000000000000001
FS: 00007f3a68d1e800(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0b1af36868 CR3: 0000000025c7b000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
check_heap_object mm/usercopy.c:195 [inline]
__check_object_size mm/usercopy.c:250 [inline]
__check_object_size+0x1c5/0x700 mm/usercopy.c:212
check_object_size include/linux/thread_info.h:199 [inline]
check_copy_size include/linux/thread_info.h:235 [inline]
copy_to_iter include/linux/uio.h:159 [inline]
simple_copy_to_iter+0x3e/0x70 net/core/datagram.c:516
__skb_datagram_iter+0x10f/0x770 net/core/datagram.c:422
skb_copy_datagram_iter+0xa2/0x2c0 net/core/datagram.c:530
skb_copy_datagram_msg include/linux/skbuff.h:4004 [inline]
__unix_dgram_recvmsg+0x3ff/0xb90 net/unix/af_unix.c:2429
unix_dgram_recvmsg+0xc0/0xe0 net/unix/af_unix.c:2487
sock_recvmsg_nosec net/socket.c:995 [inline]
sock_recvmsg net/socket.c:1013 [inline]
sock_recvmsg net/socket.c:1009 [inline]
sock_read_iter+0x337/0x470 net/socket.c:1086
call_read_iter include/linux/fs.h:2052 [inline]
new_sync_read+0x4f9/0x5f0 fs/read_write.c:401
vfs_read+0x492/0x5d0 fs/read_write.c:482
ksys_read+0x1e8/0x250 fs/read_write.c:620
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7f3a68eaa8fe
Code: c0 e9 e6 fe ff ff 50 48 8d 3d 0e c7 09 00 e8 c9 cf 01 00 66 0f 1f 84 00 00 00 00 00 64 8b 04 25 18 00 00 00 85 c0 75 14 0f 05 <48> 3d 00 f0 ff ff 77 5a c3 66 0f 1f 84 00 00 00 00 00 48 83 ec 28
RSP: 002b:00007ffc92cb5108 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f3a68eaa8fe
RDX: 00000000000000ff RSI: 0000563f295ff950 RDI: 0000000000000000
RBP: 0000563f295ff910 R08: 00007f3a68f3a040 R09: 00007f3a68f3a0c0
R10: 00007f3a68f39fc0 R11: 0000000000000246 R12: 0000563f295ff99a
R13: 0000563f295ff950 R14: 0000000000000000 R15: 0000000000000000
----------------
Code disassembly (best guess):
0: 4c 00 5d be rex.WR add %r11b,-0x42(%rbp)
4: 03 00 add (%rax),%eax
6: 00 00 add %al,(%rax)
8: e9 d6 be 81 02 jmpq 0x281bee3
d: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1)
13: 48 8b be a8 01 00 00 mov 0x1a8(%rsi),%rdi
1a: e8 b4 ff ff ff callq 0xffffffd3
1f: 31 c0 xor %eax,%eax
21: c3 retq
22: 90 nop
23: 65 8b 05 b9 f9 87 7e mov %gs:0x7e87f9b9(%rip),%eax # 0x7e87f9e3
* 2a: 89 c1 mov %eax,%ecx <-- trapping instruction
2c: 48 8b 34 24 mov (%rsp),%rsi
30: 81 e1 00 01 00 00 and $0x100,%ecx
36: 65 48 8b 14 25 80 6f mov %gs:0x26f80,%rdx
3d: 02 00
3f: a9 .byte 0xa9