INFO: task syz-executor.1:2472 blocked for more than 143 seconds.
Not tainted 5.16.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:28496 pid: 2472 ppid: 30151 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
blk_mq_freeze_queue_wait+0x112/0x160 block/blk-mq.c:178
nbd_add_socket+0x166/0x810 drivers/block/nbd.c:1109
__nbd_ioctl drivers/block/nbd.c:1454 [inline]
nbd_ioctl+0x38c/0xb10 drivers/block/nbd.c:1511
blkdev_ioctl+0x37a/0x800 block/ioctl.c:609
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl fs/ioctl.c:860 [inline]
__x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860
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+0x44/0xae
RIP: 0033:0x7f0ee745fae9
RSP: 002b:00007f0ee49b4188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f0ee7573020 RCX: 00007f0ee745fae9
RDX: 0000000000000007 RSI: 000000000000ab00 RDI: 0000000000000006
RBP: 00007f0ee74b9f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe0823c56f R14: 00007f0ee49b4300 R15: 0000000000022000
INFO: task syz-executor.1:2481 blocked for more than 143 seconds.
Not tainted 5.16.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:29592 pid: 2481 ppid: 30151 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6385
__mutex_lock_common kernel/locking/mutex.c:680 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
nbd_ioctl+0x151/0xb10 drivers/block/nbd.c:1504
blkdev_ioctl+0x37a/0x800 block/ioctl.c:609
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl fs/ioctl.c:860 [inline]
__x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860
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+0x44/0xae
RIP: 0033:0x7f0ee745fae9
RSP: 002b:00007f0ee4993188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f0ee75730e0 RCX: 00007f0ee745fae9
RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000006
RBP: 00007f0ee74b9f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe0823c56f R14: 00007f0ee4993300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8bb83b60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
2 locks held by in:imklog/6213:
#0: ffff8880155d1270 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990
#1: ffffffff8bb72fa8 (syslog_lock){+.+.}-{3:3}, at: is_bpf_text_address+0x0/0x170 kernel/bpf/core.c:702
2 locks held by agetty/6223:
#0: ffff88807ed4c098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:252
#1: ffffc900030132e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2113
2 locks held by agetty/25592:
#0: ffff88807965b098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:252
#1: ffffc900051ad2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2113
2 locks held by agetty/28249:
#0: ffff888070f3c098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:252
#1: ffffc90001d2e2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2113
1 lock held by syz-executor.1/2472:
#0: ffff88801a9da198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x151/0xb10 drivers/block/nbd.c:1504
1 lock held by syz-executor.1/2481:
#0: ffff88801a9da198 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x151/0xb10 drivers/block/nbd.c:1504
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.16.0-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:210 [inline]
watchdog+0xc1d/0xf50 kernel/hung_task.c:295
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 10322 Comm: kworker/u4:7 Not tainted 5.16.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_mcast_mla_update
RIP: 0010:native_apic_mem_read arch/x86/include/asm/apic.h:114 [inline]
RIP: 0010:__xapic_wait_icr_idle arch/x86/kernel/apic/ipi.c:107 [inline]
RIP: 0010:__default_send_IPI_shortcut arch/x86/kernel/apic/ipi.c:128 [inline]
RIP: 0010:default_send_IPI_self+0x25/0xe0 arch/x86/kernel/apic/ipi.c:242
Code: 00 eb 9d 66 90 83 ff 02 55 53 74 59 a0 60 f8 eb ff ff fb ff ff 89 fb 84 c0 74 08 3c 03 0f 8e 89 00 00 00 8b 04 25 00 c3 5f ff <48> bd 60 f8 eb ff ff fb ff ff f6 c4 10 74 1a f3 90 0f b6 45 00 84
RSP: 0018:ffffc9000530f7f8 EFLAGS: 00000246
RAX: 00000000000008fb RBX: 00000000000000f6 RCX: ffffffff812a1b03
RDX: 1ffffffff16ac55b RSI: 0000000000000008 RDI: 00000000000000f6
RBP: ffffffff8b562a80 R08: 0000000000000000 R09: ffffffff8d911c87
R10: fffffbfff1b22390 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000a20 R14: 0000000000000018 R15: 0000000000000018
FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe333a7b060 CR3: 000000000b88e000 CR4: 0000000000350ef0
Call Trace:
arch_irq_work_raise+0x92/0x110 arch/x86/kernel/irq_work.c:31
__irq_work_queue_local+0x15a/0x1b0 kernel/irq_work.c:102
irq_work_queue kernel/irq_work.c:114 [inline]
irq_work_queue+0x47/0x80 kernel/irq_work.c:106
__kfence_alloc+0x164/0x13a0 mm/kfence/core.c:884
kfence_alloc include/linux/kfence.h:126 [inline]
slab_alloc_node mm/slub.c:3152 [inline]
slab_alloc mm/slub.c:3242 [inline]
kmem_cache_alloc_trace+0x2a5/0x2c0 mm/slub.c:3259
kmalloc include/linux/slab.h:590 [inline]
batadv_mcast_mla_softif_get_ipv4 net/batman-adv/multicast.c:373 [inline]
batadv_mcast_mla_softif_get net/batman-adv/multicast.c:500 [inline]
__batadv_mcast_mla_update net/batman-adv/multicast.c:878 [inline]
batadv_mcast_mla_update+0x1a17/0x2a20 net/batman-adv/multicast.c:915
process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298
worker_thread+0x658/0x11f0 kernel/workqueue.c:2445
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
----------------
Code disassembly (best guess):
0: 00 eb add %ch,%bl
2: 9d popfq
3: 66 90 xchg %ax,%ax
5: 83 ff 02 cmp $0x2,%edi
8: 55 push %rbp
9: 53 push %rbx
a: 74 59 je 0x65
c: a0 60 f8 eb ff ff fb movabs 0xfffffbffffebf860,%al
13: ff ff
15: 89 fb mov %edi,%ebx
17: 84 c0 test %al,%al
19: 74 08 je 0x23
1b: 3c 03 cmp $0x3,%al
1d: 0f 8e 89 00 00 00 jle 0xac
23: 8b 04 25 00 c3 5f ff mov 0xffffffffff5fc300,%eax
* 2a: 48 bd 60 f8 eb ff ff movabs $0xfffffbffffebf860,%rbp <-- trapping instruction
31: fb ff ff
34: f6 c4 10 test $0x10,%ah
37: 74 1a je 0x53
39: f3 90 pause
3b: 0f b6 45 00 movzbl 0x0(%rbp),%eax
3f: 84 .byte 0x84