INFO: task syz.0.4288:31101 blocked for more than 145 seconds.
Not tainted 6.11.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.4288 state:D stack:26976 pid:31101 tgid:31099 ppid:25747 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0xe37/0x5490 kernel/sched/core.c:6529
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6621
schedule_timeout+0x258/0x2a0 kernel/time/timer.c:2557
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common+0x3de/0x5f0 kernel/sched/completion.c:116
__vhost_worker_flush+0x1aa/0x1e0 drivers/vhost/vhost.c:288
vhost_worker_flush drivers/vhost/vhost.c:295 [inline]
vhost_dev_flush+0xad/0x120 drivers/vhost/vhost.c:305
vhost_vsock_flush drivers/vhost/vsock.c:695 [inline]
vhost_vsock_dev_ioctl+0x3df/0xb50 drivers/vhost/vsock.c:879
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:907 [inline]
__se_sys_ioctl fs/ioctl.c:893 [inline]
__x64_sys_ioctl+0x193/0x220 fs/ioctl.c:893
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3168179eb9
RSP: 002b:00007f3168f42038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f3168315f80 RCX: 00007f3168179eb9
RDX: 0000000000000000 RSI: 000000000000af01 RDI: 0000000000000004
RBP: 00007f31681e793e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f3168315f80 R15: 00007ffc8fc75fa8
Showing all locks held in the system:
4 locks held by kworker/0:0/8:
3 locks held by kworker/u8:1/12:
1 lock held by khungtaskd/30:
#0: ffffffff8ddb9fe0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
#0: ffffffff8ddb9fe0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
#0: ffffffff8ddb9fe0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6626
3 locks held by kswapd0/89:
3 locks held by kworker/u8:5/1020:
3 locks held by kworker/u8:7/1830:
2 locks held by kworker/u8:10/2533:
2 locks held by kworker/u8:13/2963:
2 locks held by getty/4980:
#0: ffff888030cc70a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc90002efe2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc8/0x1490 drivers/tty/n_tty.c:2211
3 locks held by kworker/0:4/5278:
#0: ffff88801ac80948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x1277/0x1b40 kernel/workqueue.c:3206
#1: ffffc9000418fd80 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x921/0x1b40 kernel/workqueue.c:3207
#2: ffff88804e601240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x1bb/0x26d0 drivers/net/netdevsim/fib.c:1489
3 locks held by kworker/1:4/5309:
4 locks held by kworker/1:2/12214:
2 locks held by kworker/u8:16/12360:
3 locks held by kworker/u8:21/19913:
4 locks held by kworker/u8:24/20642:
3 locks held by kworker/1:7/22866:
3 locks held by kworker/u8:8/23621:
3 locks held by kworker/u8:29/23625:
4 locks held by kworker/u8:30/23627:
1 lock held by syz.0.4288/31101:
#0: ffff888162640070 (&dev->mutex#5){+.+.}-{3:3}, at: vhost_vsock_dev_ioctl+0x3a2/0xb50 drivers/vhost/vsock.c:874
2 locks held by syz-executor/22504:
1 lock held by syz.1.4675/31342:
#0: ffffffff8ddc5778 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock+0x1a4/0x3b0 kernel/rcu/tree_exp.h:328
2 locks held by syz.2.4677/31415:
1 lock held by syz.2.4677/31416:
#0: ffff88802fc7e098 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_lock_killable include/linux/mmap_lock.h:153 [inline]
#0: ffff88802fc7e098 (&mm->mmap_lock){++++}-{3:3}, at: get_mmap_lock_carefully mm/memory.c:5878 [inline]
#0: ffff88802fc7e098 (&mm->mmap_lock){++++}-{3:3}, at: lock_mm_and_find_vma+0x3a9/0x6a0 mm/memory.c:5929
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call Trace:
__dump_stack lib/dump_stack.c:93 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:119
nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xf0c/0x1240 kernel/hung_task.c:379
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 22504 Comm: syz-executor Not tainted 6.11.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:orc_ip arch/x86/kernel/unwind_orc.c:80 [inline]
RIP: 0010:__orc_find+0xb2/0x130 arch/x86/kernel/unwind_orc.c:102
Code: c1 fa 02 48 01 d0 48 d1 f8 4c 8d 3c 83 4c 89 fa 48 c1 ea 03 42 0f b6 0c 32 4c 89 fa 83 e2 07 83 c2 03 38 ca 7c 04 84 c9 75 73 <49> 63 17 4c 89 e7 4d 8d 2c 17 4c 89 ee e8 7c ed 4e 00 4d 39 ec 73
RSP: 0018:ffffc900034775d8 EFLAGS: 00000246
RAX: 0000000000000003 RBX: ffffffff90235dcc RCX: 0000000000000000
RDX: 0000000000000003 RSI: ffffffff813cd3da RDI: 0000000000000005
RBP: ffffffff90235de4 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000007 R11: 0000000000000000 R12: ffffffff81341521
R13: ffffffff90a3b47a R14: dffffc0000000000 R15: ffffffff90235dd8
FS: 0000555564c05500(0000) GS:ffff8880b8800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020071000 CR3: 0000000160d56000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
orc_find arch/x86/kernel/unwind_orc.c:227 [inline]
unwind_next_frame+0x335/0x23a0 arch/x86/kernel/unwind_orc.c:494
__unwind_start+0x5aa/0x880 arch/x86/kernel/unwind_orc.c:760
unwind_start arch/x86/include/asm/unwind.h:64 [inline]
arch_stack_walk+0xb2/0x170 arch/x86/kernel/stacktrace.c:24
stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579
poison_slab_object+0xf7/0x160 mm/kasan/common.c:240
__kasan_slab_free+0x32/0x50 mm/kasan/common.c:256
kasan_slab_free include/linux/kasan.h:184 [inline]
slab_free_hook mm/slub.c:2252 [inline]
slab_free mm/slub.c:4473 [inline]
kmem_cache_free+0x12f/0x3a0 mm/slub.c:4548
kfree_skbmem+0x1a4/0x1f0 net/core/skbuff.c:1146
__kfree_skb net/core/skbuff.c:1203 [inline]
consume_skb net/core/skbuff.c:1426 [inline]
consume_skb+0xdd/0x160 net/core/skbuff.c:1420
netlink_unicast_kernel net/netlink/af_netlink.c:1332 [inline]
netlink_unicast+0x547/0x7f0 net/netlink/af_netlink.c:1357
netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1901
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg net/socket.c:745 [inline]
__sys_sendto+0x47f/0x4e0 net/socket.c:2204
__do_sys_sendto net/socket.c:2216 [inline]
__se_sys_sendto net/socket.c:2212 [inline]
__x64_sys_sendto+0xe0/0x1c0 net/socket.c:2212
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6ccbd7bd4c
Code: 2a 5a 02 00 44 8b 4c 24 2c 4c 8b 44 24 20 89 c5 44 8b 54 24 28 48 8b 54 24 18 b8 2c 00 00 00 48 8b 74 24 10 8b 7c 24 08 0f 05 <48> 3d 00 f0 ff ff 77 34 89 ef 48 89 44 24 08 e8 70 5a 02 00 48 8b
RSP: 002b:00007ffe725935c0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f6ccca44620 RCX: 00007f6ccbd7bd4c
RDX: 0000000000000028 RSI: 00007f6ccca44670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffe72593614 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007f6ccca44670 R15: 0000000000000000