INFO: task syz-executor.3:17454 blocked for more than 143 seconds.
Not tainted 5.17.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:27464 pid:17454 ppid: 3875 flags:0x20004004
Call Trace:
context_switch kernel/sched/core.c:4986 [inline]
__schedule+0xab2/0x4db0 kernel/sched/core.c:6295
schedule+0xd2/0x260 kernel/sched/core.c:6368
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6427
__mutex_lock_common kernel/locking/mutex.c:673 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:733
tty_open_by_driver drivers/tty/tty_io.c:2050 [inline]
tty_open+0x55e/0x1000 drivers/tty/tty_io.c:2133
chrdev_open+0x266/0x770 fs/char_dev.c:414
do_dentry_open+0x4b9/0x1240 fs/open.c:824
do_open fs/namei.c:3476 [inline]
path_openat+0x1c9e/0x2940 fs/namei.c:3609
do_filp_open+0x1aa/0x400 fs/namei.c:3636
do_sys_openat2+0x16d/0x4d0 fs/open.c:1214
do_sys_open fs/open.c:1230 [inline]
__do_compat_sys_openat fs/open.c:1290 [inline]
__se_compat_sys_openat fs/open.c:1288 [inline]
__ia32_compat_sys_openat+0x13f/0x1f0 fs/open.c:1288
do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
__do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178
do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203
entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
RIP: 0023:0xf6e84549
RSP: 002b:00000000f587e5cc EFLAGS: 00000296 ORIG_RAX: 0000000000000127
RAX: ffffffffffffffda RBX: 00000000ffffff9c RCX: 0000000020000840
RDX: 00000000000c0a81 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8bb83aa0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6460
1 lock held by syslogd/2953:
#0: ffff8880b9d39c58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:489
2 locks held by getty/3284:
#0: ffff88814a964098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc90002b632e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2077
1 lock held by syz-executor.2/17452:
4 locks held by syz-executor.3/17454:
1 lock held by syz-executor.5/17507:
#0: ffffffff8c5bc7c8 (tty_mutex){+.+.}-{3:3}, at: tty_open_by_driver drivers/tty/tty_io.c:2050 [inline]
#0: ffffffff8c5bc7c8 (tty_mutex){+.+.}-{3:3}, at: tty_open+0x55e/0x1000 drivers/tty/tty_io.c:2133
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.17.0-rc1-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+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111
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:212 [inline]
watchdog+0xc1d/0xf50 kernel/hung_task.c:369
kthread+0x2e9/0x3a0 kernel/kthread.c:377
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 3905 Comm: kworker/1:5 Not tainted 5.17.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events nsim_dev_trap_report_work
RIP: 0010:gfp_zone include/linux/gfp.h:485 [inline]
RIP: 0010:get_any_partial mm/slub.c:2196 [inline]
RIP: 0010:get_partial mm/slub.c:2266 [inline]
RIP: 0010:___slab_alloc+0x786/0xe90 mm/slub.c:3013
Code: 00 00 48 85 f6 74 23 48 83 7e 40 00 74 1c 48 8d 54 24 40 44 89 f1 48 89 ef e8 66 f6 ff ff 48 85 c0 48 89 c2 0f 85 9e fe ff ff <80> 7c 24 2b 00 0f 85 6d 04 00 00 8b 8d b8 00 00 00 85 c9 0f 84 b6
RSP: 0018:ffffc9000282fac8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff8880b9d3d920 RCX: 1ffffffff2004bb6
RDX: 0000000000000000 RSI: ffff888010c409c0 RDI: 0000000000000000
RBP: ffff888010c42140 R08: 0000000000000001 R09: ffffffff8ffcea2f
R10: 0000000000000001 R11: 0000000000000001 R12: 00000000ffffffff
R13: 0000000000000001 R14: 0000000000082a20 R15: ffffea0000638800
FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f16c31defa8 CR3: 000000007f4b2000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
__slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3105
slab_alloc_node mm/slub.c:3196 [inline]
__kmalloc_node_track_caller+0x2cb/0x360 mm/slub.c:4957
kmalloc_reserve net/core/skbuff.c:354 [inline]
__alloc_skb+0xde/0x340 net/core/skbuff.c:426
alloc_skb include/linux/skbuff.h:1158 [inline]
nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:745 [inline]
nsim_dev_trap_report drivers/net/netdevsim/dev.c:802 [inline]
nsim_dev_trap_report_work+0x29a/0xbc0 drivers/net/netdevsim/dev.c:843
process_one_work+0x9ac/0x1650 kernel/workqueue.c:2307
worker_thread+0x657/0x1110 kernel/workqueue.c:2454
kthread+0x2e9/0x3a0 kernel/kthread.c:377
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
----------------
Code disassembly (best guess):
0: 00 00 add %al,(%rax)
2: 48 85 f6 test %rsi,%rsi
5: 74 23 je 0x2a
7: 48 83 7e 40 00 cmpq $0x0,0x40(%rsi)
c: 74 1c je 0x2a
e: 48 8d 54 24 40 lea 0x40(%rsp),%rdx
13: 44 89 f1 mov %r14d,%ecx
16: 48 89 ef mov %rbp,%rdi
19: e8 66 f6 ff ff callq 0xfffff684
1e: 48 85 c0 test %rax,%rax
21: 48 89 c2 mov %rax,%rdx
24: 0f 85 9e fe ff ff jne 0xfffffec8
* 2a: 80 7c 24 2b 00 cmpb $0x0,0x2b(%rsp) <-- trapping instruction
2f: 0f 85 6d 04 00 00 jne 0x4a2
35: 8b 8d b8 00 00 00 mov 0xb8(%rbp),%ecx
3b: 85 c9 test %ecx,%ecx
3d: 0f .byte 0xf
3e: 84 .byte 0x84
3f: b6 .byte 0xb6