INFO: task syz-executor.0:9052 blocked for more than 143 seconds.
Not tainted 5.13.0-rc3-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:27544 pid: 9052 ppid: 8444 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4339 [inline]
__schedule+0x916/0x23e0 kernel/sched/core.c:5147
schedule+0xcf/0x270 kernel/sched/core.c:5226
schedule_timeout+0x1db/0x250 kernel/time/timer.c:1868
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common kernel/sched/completion.c:106 [inline]
wait_for_common kernel/sched/completion.c:117 [inline]
wait_for_completion+0x168/0x270 kernel/sched/completion.c:138
__flush_work+0x527/0xac0 kernel/workqueue.c:3053
__cancel_work_timer+0x3f9/0x570 kernel/workqueue.c:3140
p9_conn_destroy net/9p/trans_fd.c:891 [inline]
p9_fd_close+0x305/0x520 net/9p/trans_fd.c:921
p9_client_destroy+0xbe/0x360 net/9p/client.c:1088
v9fs_session_init+0xfd2/0x1770 fs/9p/v9fs.c:482
v9fs_mount+0x79/0x9c0 fs/9p/vfs_super.c:126
legacy_get_tree+0x105/0x220 fs/fs_context.c:592
vfs_get_tree+0x89/0x2f0 fs/super.c:1498
do_new_mount fs/namespace.c:2905 [inline]
path_mount+0x132a/0x1fa0 fs/namespace.c:3235
do_mount fs/namespace.c:3248 [inline]
__do_sys_mount fs/namespace.c:3456 [inline]
__se_sys_mount fs/namespace.c:3433 [inline]
__x64_sys_mount+0x27f/0x300 fs/namespace.c:3433
do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665d9
RSP: 002b:00007fa223087188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 000000000056c1a8 RCX: 00000000004665d9
RDX: 0000000020000240 RSI: 0000000020000200 RDI: 0000000000000000
RBP: 00000000004bfcb9 R08: 0000000020000580 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c1a8
R13: 00007ffcbc09043f R14: 00007fa223087300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/1636:
#0: ffffffff8bf79320 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6333
2 locks held by in:imklog/8116:
2 locks held by kworker/1:0/8585:
#0: ffff888011064d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888011064d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline]
#0: ffff888011064d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline]
#0: ffff888011064d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:617 [inline]
#0: ffff888011064d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline]
#0: ffff888011064d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x871/0x1600 kernel/workqueue.c:2247
#1: ffffc90001f7fda8 ((work_completion)(&m->wq)){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1600 kernel/workqueue.c:2251
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 1636 Comm: khungtaskd Not tainted 5.13.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:79 [inline]
dump_stack+0x141/0x1d7 lib/dump_stack.c:120
nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105
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:209 [inline]
watchdog+0xd48/0xfb0 kernel/hung_task.c:294
kthread+0x3b1/0x4a0 kernel/kthread.c:313
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 8 Comm: kworker/0:2 Not tainted 5.13.0-rc3-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:on_stack arch/x86/include/asm/stacktrace.h:45 [inline]
RIP: 0010:stack_access_ok arch/x86/kernel/unwind_orc.c:342 [inline]
RIP: 0010:deref_stack_reg+0x4b/0x150 arch/x86/kernel/unwind_orc.c:352
Code: 83 ec 08 0f b6 04 02 84 c0 74 08 3c 03 0f 8e d7 00 00 00 41 8b 04 24 85 c0 74 62 49 8d 7c 24 08 48 b8 00 00 00 00 00 fc ff df <48> 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 c3 00 00 00 49 8d 7c 24 10
RSP: 0018:ffffc90000cd7628 EFLAGS: 00000202
RAX: dffffc0000000000 RBX: ffffc90000cd77c0 RCX: 0000000000000000
RDX: 1ffff9200019aef0 RSI: ffffc90000cd7750 RDI: ffffc90000cd7788
RBP: ffffc90000cd7750 R08: ffffffff8e42217e R09: 0000000000000001
R10: fffff5200019aefb R11: 0000000000084087 R12: ffffc90000cd7780
R13: ffffc90000cd77b5 R14: ffffc90000cd7780 R15: ffffc90000cd77b4
FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efeea342000 CR3: 000000002d1cf000 CR4: 0000000000350ef0
Call Trace:
unwind_next_frame+0x13e0/0x1ce0 arch/x86/kernel/unwind_orc.c:587
__unwind_start+0x51b/0x800 arch/x86/kernel/unwind_orc.c:699
unwind_start arch/x86/include/asm/unwind.h:60 [inline]
arch_stack_walk+0x5c/0xe0 arch/x86/kernel/stacktrace.c:24
stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:121
kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
kasan_set_track+0x1c/0x30 mm/kasan/common.c:46
kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:357
____kasan_slab_free mm/kasan/common.c:360 [inline]
____kasan_slab_free mm/kasan/common.c:325 [inline]
__kasan_slab_free+0xfb/0x130 mm/kasan/common.c:368
kasan_slab_free include/linux/kasan.h:212 [inline]
slab_free_hook mm/slub.c:1582 [inline]
slab_free_freelist_hook+0xdf/0x240 mm/slub.c:1607
slab_free mm/slub.c:3167 [inline]
kfree+0xe5/0x7f0 mm/slub.c:4217
skb_free_head net/core/skbuff.c:651 [inline]
skb_release_data+0x622/0x750 net/core/skbuff.c:672
skb_release_all net/core/skbuff.c:726 [inline]
__kfree_skb net/core/skbuff.c:740 [inline]
consume_skb net/core/skbuff.c:896 [inline]
consume_skb+0xc2/0x160 net/core/skbuff.c:890
nsim_dev_trap_report drivers/net/netdevsim/dev.c:586 [inline]
nsim_dev_trap_report_work+0x86f/0xbd0 drivers/net/netdevsim/dev.c:611
process_one_work+0x98d/0x1600 kernel/workqueue.c:2276
worker_thread+0x64c/0x1120 kernel/workqueue.c:2422
kthread+0x3b1/0x4a0 kernel/kthread.c:313
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294