INFO: task syz-executor.1:1822 blocked for more than 143 seconds.
Not tainted 5.16.0-rc4-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:27088 pid: 1822 ppid: 6435 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xb72/0x1460 kernel/sched/core.c:6253
schedule+0x12b/0x1f0 kernel/sched/core.c:6326
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6385
__mutex_lock_common+0xd1f/0x2590 kernel/locking/mutex.c:680
__mutex_lock kernel/locking/mutex.c:740 [inline]
mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:792
drm_gem_prime_fd_to_handle+0x159/0x460 drivers/gpu/drm/drm_prime.c:316
drm_ioctl_kernel+0x355/0x4e0 drivers/gpu/drm/drm_ioctl.c:782
drm_ioctl+0x617/0x9d0 drivers/gpu/drm/drm_ioctl.c:885
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl+0xfb/0x170 fs/ioctl.c:860
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f4d20717b49
RSP: 002b:00007f4d1f24b188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f4d2082b0f0 RCX: 00007f4d20717b49
RDX: 00000000200004c0 RSI: 00000000c00c642e RDI: 0000000000000004
RBP: 00007f4d20772012 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffda140d0f R14: 00007f4d1f24b300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/26:
#0: ffffffff8cb1dd00 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/3283:
#0: ffff888022f0c098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
#1: ffffc90002b962e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6c5/0x1c60 drivers/tty/n_tty.c:2113
3 locks held by syz-executor.1/1640:
#0: ffff888029c063d8 (&prime_fpriv->lock){+.+.}-{3:3}, at: drm_gem_prime_fd_to_handle+0x64/0x460 drivers/gpu/drm/drm_prime.c:308
#1: ffff88801aef0c70 (&dev->object_name_lock){+.+.}-{3:3}, at: drm_gem_prime_fd_to_handle+0x159/0x460 drivers/gpu/drm/drm_prime.c:316
#2: ffff8880789f1a98 (&shmem->pages_lock){+.+.}-{3:3}, at: drm_gem_shmem_get_pages+0x58/0x210 drivers/gpu/drm/drm_gem_shmem_helper.c:203
2 locks held by syz-executor.1/1822:
#0: ffff8880780bf3d8 (&prime_fpriv->lock){+.+.}-{3:3}, at: drm_gem_prime_fd_to_handle+0x64/0x460 drivers/gpu/drm/drm_prime.c:308
#1: ffff88801aef0c70 (&dev->object_name_lock){+.+.}-{3:3}, at: drm_gem_prime_fd_to_handle+0x159/0x460 drivers/gpu/drm/drm_prime.c:316
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 26 Comm: khungtaskd Not tainted 5.16.0-rc4-syzkaller #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+0x1dc/0x2d8 lib/dump_stack.c:106
nmi_cpu_backtrace+0x45f/0x490 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x16a/0x280 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
watchdog+0xc82/0xcd0 kernel/hung_task.c:295
kthread+0x468/0x490 kernel/kthread.c:327
ret_from_fork+0x1f/0x30
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 13151 Comm: kworker/u4:24 Not tainted 5.16.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: phy19 ieee80211_iface_work
RIP: 0010:strlen+0x2c/0x60 lib/string.c:487
Code: 41 56 53 49 89 fe 49 bf 00 00 00 00 00 fc ff df 48 89 f8 66 2e 0f 1f 84 00 00 00 00 00 90 48 89 c3 48 c1 e8 03 42 0f b6 04 38 <84> c0 75 0b 48 8d 43 01 80 3b 00 75 e7 eb 13 89 d9 80 e1 07 38 c1
RSP: 0018:ffffc90004f8f960 EFLAGS: 00000a02
RAX: 0000000000000000 RBX: ffffffff8bbc1460 RCX: 0000000004f8fa03
RDX: 0000000000000000 RSI: ffffc90004f8fd20 RDI: ffffffff8bbc1460
RBP: ffffc90004f8fa98 R08: 0000000000000000 R09: 0000000000000001
R10: fffffbfff1bfd166 R11: 0000000000000000 R12: 0000000000000000
R13: ffffffff8c9ec4c0 R14: ffffffff8bbc1460 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055dd0bdfd600 CR3: 000000000c88e000 CR4: 00000000003526e0
Call Trace:
trace_event_get_offsets_lock_acquire include/trace/events/lock.h:13 [inline]
perf_trace_lock_acquire+0x113/0x4a0 include/trace/events/lock.h:13
trace_lock_acquire+0x161/0x190 include/trace/events/lock.h:13
lock_acquire+0xa5/0x4d0 kernel/locking/lockdep.c:5608
process_one_work+0x827/0x1140 kernel/workqueue.c:2274
worker_thread+0xac1/0x1320 kernel/workqueue.c:2445
kthread+0x468/0x490 kernel/kthread.c:327
ret_from_fork+0x1f/0x30
----------------
Code disassembly (best guess):
0: 41 56 push %r14
2: 53 push %rbx
3: 49 89 fe mov %rdi,%r14
6: 49 bf 00 00 00 00 00 movabs $0xdffffc0000000000,%r15
d: fc ff df
10: 48 89 f8 mov %rdi,%rax
13: 66 2e 0f 1f 84 00 00 nopw %cs:0x0(%rax,%rax,1)
1a: 00 00 00
1d: 90 nop
1e: 48 89 c3 mov %rax,%rbx
21: 48 c1 e8 03 shr $0x3,%rax
25: 42 0f b6 04 38 movzbl (%rax,%r15,1),%eax
* 2a: 84 c0 test %al,%al <-- trapping instruction
2c: 75 0b jne 0x39
2e: 48 8d 43 01 lea 0x1(%rbx),%rax
32: 80 3b 00 cmpb $0x0,(%rbx)
35: 75 e7 jne 0x1e
37: eb 13 jmp 0x4c
39: 89 d9 mov %ebx,%ecx
3b: 80 e1 07 and $0x7,%cl
3e: 38 c1 cmp %al,%cl