INFO: task syz-executor.5:20503 can't die for more than 143 seconds.
task:syz-executor.5 state:D stack:27312 pid:20503 ppid: 8633 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4327 [inline]
__schedule+0x8cd/0x2150 kernel/sched/core.c:5078
schedule+0xcf/0x270 kernel/sched/core.c:5157
rwsem_down_write_slowpath+0x7e5/0x1200 kernel/locking/rwsem.c:1106
__down_write_common kernel/locking/rwsem.c:1261 [inline]
__down_write_common kernel/locking/rwsem.c:1258 [inline]
__down_write kernel/locking/rwsem.c:1270 [inline]
down_write+0x132/0x150 kernel/locking/rwsem.c:1407
inode_lock include/linux/fs.h:773 [inline]
lock_mount+0x8a/0x2e0 fs/namespace.c:2214
do_new_mount_fc fs/namespace.c:2842 [inline]
do_new_mount fs/namespace.c:2901 [inline]
path_mount+0x1678/0x1e70 fs/namespace.c:3230
do_mount fs/namespace.c:3243 [inline]
__do_sys_mount fs/namespace.c:3451 [inline]
__se_sys_mount fs/namespace.c:3428 [inline]
__x64_sys_mount+0x27f/0x300 fs/namespace.c:3428
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45e219
RSP: 002b:00007f3acdcbac68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 000000000045e219
RDX: 0000000020002100 RSI: 00000000200020c0 RDI: 0000000000000000
RBP: 000000000119bfd0 R08: 0000000020002140 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c
R13: 00007ffdb0c33fef R14: 00007f3acdcbb9c0 R15: 000000000119bf8c
INFO: task syz-executor.5:20503 blocked for more than 143 seconds.
Not tainted 5.10.0-next-20201223-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5 state:D stack:27312 pid:20503 ppid: 8633 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4327 [inline]
__schedule+0x8cd/0x2150 kernel/sched/core.c:5078
schedule+0xcf/0x270 kernel/sched/core.c:5157
rwsem_down_write_slowpath+0x7e5/0x1200 kernel/locking/rwsem.c:1106
__down_write_common kernel/locking/rwsem.c:1261 [inline]
__down_write_common kernel/locking/rwsem.c:1258 [inline]
__down_write kernel/locking/rwsem.c:1270 [inline]
down_write+0x132/0x150 kernel/locking/rwsem.c:1407
inode_lock include/linux/fs.h:773 [inline]
lock_mount+0x8a/0x2e0 fs/namespace.c:2214
do_new_mount_fc fs/namespace.c:2842 [inline]
do_new_mount fs/namespace.c:2901 [inline]
path_mount+0x1678/0x1e70 fs/namespace.c:3230
do_mount fs/namespace.c:3243 [inline]
__do_sys_mount fs/namespace.c:3451 [inline]
__se_sys_mount fs/namespace.c:3428 [inline]
__x64_sys_mount+0x27f/0x300 fs/namespace.c:3428
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45e219
RSP: 002b:00007f3acdcbac68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 000000000045e219
RDX: 0000000020002100 RSI: 00000000200020c0 RDI: 0000000000000000
RBP: 000000000119bfd0 R08: 0000000020002140 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c
R13: 00007ffdb0c33fef R14: 00007f3acdcbb9c0 R15: 000000000119bf8c
INFO: task syz-executor.5:20507 can't die for more than 144 seconds.
task:syz-executor.5 state:R running task stack:26664 pid:20507 ppid: 8633 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:4327 [inline]
__schedule+0x8cd/0x2150 kernel/sched/core.c:5078
preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:5238
Showing all locks held in the system:
3 locks held by kworker/u4:0/9:
#0: ffff8880b9f34c58 (&rq->lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1318 [inline]
#0: ffff8880b9f34c58 (&rq->lock){-.-.}-{2:2}, at: __schedule+0x217/0x2150 kernel/sched/core.c:4995
#1: ffffc90000ce7da8 ((work_completion)(&(&bat_priv->nc.work)->work)){+.+.}-{0:0}, at: process_one_work+0x8a5/0x15f0 kernel/workqueue.c:2250
#2: ffffffff8b363660 (rcu_read_lock){....}-{1:2}, at: batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:402 [inline]
#2: ffffffff8b363660 (rcu_read_lock){....}-{1:2}, at: batadv_nc_worker+0xf3/0xe50 net/batman-adv/network-coding.c:715
1 lock held by khungtaskd/1653:
#0: ffffffff8b363660 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6254
1 lock held by in:imklog/8181:
#0: ffff8880236594f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:949
1 lock held by syz-executor.5/20503:
#0: ffff888031f69590 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:773 [inline]
#0: ffff888031f69590 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lock_mount+0x8a/0x2e0 fs/namespace.c:2214
2 locks held by syz-executor.5/20507:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 1653 Comm: khungtaskd Not tainted 5.10.0-next-20201223-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+0x107/0x163 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:147 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:253 [inline]
watchdog+0xd89/0xf30 kernel/hung_task.c:338
kthread+0x3b1/0x4a0 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 9 Comm: kworker/u4:0 Not tainted 5.10.0-next-20201223-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: phy10 ieee80211_iface_work
RIP: 0010:__lock_acquire+0xc0c/0x5500 kernel/locking/lockdep.c:4829
Code: 00 00 48 8d 1c 5b 48 c1 e3 06 48 81 c3 c0 2b be 8e 48 8d 7b 40 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 <0f> 85 b7 47 00 00 48 83 7b 40 00 0f 84 4a 0d 00 00 0f b7 44 24 38
RSP: 0018:ffffc90000ce7140 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: ffffffff8ebe2bc0 RCX: ffffffff815838b6
RDX: 1ffffffff1d7c580 RSI: 0000000000000008 RDI: ffffffff8ebe2c00
RBP: ffff888010d60000 R08: 0000000000000000 R09: ffffffff8ebe27a7
R10: fffffbfff1d7c4f4 R11: 0000000000000000 R12: ffff888010d60a08
R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f392f7d5020 CR3: 0000000025d5f000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire kernel/locking/lockdep.c:5437 [inline]
lock_acquire+0x29d/0x740 kernel/locking/lockdep.c:5402
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:159
__debug_check_no_obj_freed lib/debugobjects.c:975 [inline]
debug_check_no_obj_freed+0xc7/0x420 lib/debugobjects.c:1018
slab_free_hook mm/slub.c:1540 [inline]
slab_free_freelist_hook+0x12b/0x1d0 mm/slub.c:1586
slab_free mm/slub.c:3157 [inline]
kfree+0xe5/0x5c0 mm/slub.c:4156
ieee802_11_parse_elems_crc+0xa65/0xf00 net/mac80211/util.c:1513
ieee802_11_parse_elems net/mac80211/ieee80211_i.h:2039 [inline]
ieee80211_rx_mgmt_probe_beacon+0x188/0x16b0 net/mac80211/ibss.c:1612
ieee80211_ibss_rx_queued_mgmt+0xe3e/0x1870 net/mac80211/ibss.c:1642
ieee80211_iface_work+0x761/0x9e0 net/mac80211/iface.c:1423
process_one_work+0x98d/0x15f0 kernel/workqueue.c:2275
worker_thread+0x64c/0x1120 kernel/workqueue.c:2421
kthread+0x3b1/0x4a0 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296