INFO: task syz-executor.4:19051 blocked for more than 143 seconds.
Not tainted 6.0.0-rc3-syzkaller-00363-g7726d4c3e60b #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:28456 pid:19051 ppid: 3643 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5182 [inline]
__schedule+0xadf/0x52b0 kernel/sched/core.c:6494
schedule+0xda/0x1b0 kernel/sched/core.c:6570
schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1911
___down_common kernel/locking/semaphore.c:225 [inline]
__down_common+0x341/0x780 kernel/locking/semaphore.c:246
down+0x70/0x90 kernel/locking/semaphore.c:63
console_lock+0x28/0x80 kernel/printk/printk.c:2568
do_fb_ioctl+0x2e4/0x6e0 drivers/video/fbdev/core/fbmem.c:1118
fb_ioctl+0xe7/0x150 drivers/video/fbdev/core/fbmem.c:1201
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl fs/ioctl.c:856 [inline]
__x64_sys_ioctl+0x193/0x200 fs/ioctl.c:856
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+0x63/0xcd
RIP: 0033:0x7f1952689279
RSP: 002b:00007f19515fe168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f195279bf80 RCX: 00007f1952689279
RDX: 0000000020000000 RSI: 0000000000004601 RDI: 0000000000000004
RBP: 00007f19526e32e9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1952ccfb1f R14: 00007f19515fe300 R15: 0000000000022000
Showing all locks held in the system:
3 locks held by kworker/u4:1/11:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8bf88830 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8bf88530 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507
1 lock held by khungtaskd/28:
#0: ffffffff8bf89380 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6492
2 locks held by getty/3283:
#0: ffff888026a6a098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc90002d232f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef0/0x13e0 drivers/tty/n_tty.c:2177
5 locks held by syz-executor.1/18462:
1 lock held by syz-executor.3/19226:
1 lock held by syz-executor.2/19276:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.0.0-rc3-syzkaller-00363-g7726d4c3e60b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x46/0x14f lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x206/0x250 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
watchdog+0xc18/0xf50 kernel/hung_task.c:369
kthread+0x2e4/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 3617 Comm: syz-fuzzer Not tainted 6.0.0-rc3-syzkaller-00363-g7726d4c3e60b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
RIP: 0033:0x41da1a
Code: 8b 74 24 30 48 8b 7c 24 40 4c 8b 44 24 18 48 89 c1 48 8b 44 24 58 48 85 c9 0f 84 e4 00 00 00 48 89 c3 48 89 c8 e8 e6 05 00 00 <48> 8b 5c 24 58 48 8b 4b 18 48 81 f9 d0 07 00 00 0f 8c aa 00 00 00
RSP: 002b:000000c00058df18 EFLAGS: 00000202
RAX: 0000000000000030 RBX: 000000c000021e98 RCX: 0000000000000001
RDX: 0000000000000030 RSI: 0000000000203002 RDI: 0000000000836420
RBP: 000000c00058df60 R08: 0000000000000002 R09: 00007f37b89899cd
R10: 0000000000000000 R11: 00007f37b898afff R12: 000000c00bfd3980
R13: 00000000000000fa R14: 000000c000285a00 R15: 0000000000000000
FS: 000000c0003c4490 GS: 0000000000000000