INFO: task syz-executor.2:10215 blocked for more than 143 seconds.
Not tainted 5.11.0-rc3-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:25432 pid:10215 ppid: 8482 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4313 [inline]
__schedule+0xa4d/0xf80 kernel/sched/core.c:5064
schedule+0x14b/0x200 kernel/sched/core.c:5143
rwsem_down_write_slowpath+0xe52/0x1590 kernel/locking/rwsem.c:1106
__down_write_common kernel/locking/rwsem.c:1261 [inline]
__down_write kernel/locking/rwsem.c:1270 [inline]
down_write+0x160/0x170 kernel/locking/rwsem.c:1407
inode_lock include/linux/fs.h:773 [inline]
open_last_lookups fs/namei.c:3177 [inline]
path_openat+0x823/0x3ac0 fs/namei.c:3368
do_filp_open+0x1f1/0x430 fs/namei.c:3398
do_sys_openat2+0x124/0x460 fs/open.c:1172
do_sys_open fs/open.c:1188 [inline]
__do_sys_creat fs/open.c:1262 [inline]
__se_sys_creat fs/open.c:1256 [inline]
__x64_sys_creat+0x11f/0x160 fs/open.c:1256
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45e219
RSP: 002b:00007fa314eccc68 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 000000000045e219
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020002040
RBP: 000000000119c060 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119c034
R13: 00007ffda319b37f R14: 00007fa314ecd9c0 R15: 000000000119c034
INFO: task syz-executor.2:10221 blocked for more than 143 seconds.
Not tainted 5.11.0-rc3-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:25880 pid:10221 ppid: 8482 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4313 [inline]
__schedule+0xa4d/0xf80 kernel/sched/core.c:5064
schedule+0x14b/0x200 kernel/sched/core.c:5143
rwsem_down_write_slowpath+0xe52/0x1590 kernel/locking/rwsem.c:1106
__down_write_common kernel/locking/rwsem.c:1261 [inline]
__down_write kernel/locking/rwsem.c:1270 [inline]
down_write+0x160/0x170 kernel/locking/rwsem.c:1407
inode_lock include/linux/fs.h:773 [inline]
lock_mount+0x6a/0x2f0 fs/namespace.c:2195
do_new_mount_fc fs/namespace.c:2821 [inline]
do_new_mount fs/namespace.c:2880 [inline]
path_mount+0x22dc/0x2c50 fs/namespace.c:3208
do_mount fs/namespace.c:3221 [inline]
__do_sys_mount fs/namespace.c:3429 [inline]
__se_sys_mount+0x2f9/0x3b0 fs/namespace.c:3406
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45e219
RSP: 002b:00007fa314eabc68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 000000000045e219
RDX: 0000000020002000 RSI: 00000000200042c0 RDI: 0000000000000000
RBP: 000000000119c120 R08: 0000000020002140 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119c0dc
R13: 00007ffda319b37f R14: 00007fa314eac9c0 R15: 000000000119c0dc
Showing all locks held in the system:
1 lock held by kworker/u4:3/123:
#0: ffff8880b9d34758 (&rq->lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1319 [inline]
#0: ffff8880b9d34758 (&rq->lock){-.-.}-{2:2}, at: __schedule+0x144/0xf80 kernel/sched/core.c:4981
1 lock held by khungtaskd/1639:
#0: ffffffff8c311580 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 arch/x86/pci/mmconfig_64.c:151
1 lock held by in:imklog/8131:
#0: ffff888018997770 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x2f0 fs/file.c:947
2 locks held by syz-executor.2/10209:
2 locks held by syz-executor.2/10215:
#0: ffff88806dfd4460 (sb_writers#15){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:354
#1: ffff8880752c0150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:773 [inline]
#1: ffff8880752c0150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: open_last_lookups fs/namei.c:3177 [inline]
#1: ffff8880752c0150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: path_openat+0x823/0x3ac0 fs/namei.c:3368
1 lock held by syz-executor.2/10221:
#0: ffff8880752c0150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:773 [inline]
#0: ffff8880752c0150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lock_mount+0x6a/0x2f0 fs/namespace.c:2195
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 1639 Comm: khungtaskd Not tainted 5.11.0-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+0x183/0x22e lib/dump_stack.c:120
nmi_cpu_backtrace+0x16c/0x190 lib/nmi_backtrace.c:105
nmi_trigger_cpumask_backtrace+0x191/0x2f0 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+0xce9/0xd30 kernel/hung_task.c:294
kthread+0x39a/0x3c0 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: 123 Comm: kworker/u4:3 Not tainted 5.11.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
RIP: 0010:__lock_acquire+0x6/0x5e40 kernel/locking/lockdep.c:4690
Code: 83 c4 10 65 ff 0d 66 95 a2 7e 0f 85 a4 fe ff ff e8 ce f6 a0 ff e9 9a fe ff ff 0f 0b e9 58 ff ff ff 0f 1f 00 55 48 89 e5 41 57 <41> 56 41 55 41 54 53 48 83 e4 e0 48 81 ec 60 03 00 00 45 89 cf 44
RSP: 0018:ffffc9000130fa48 EFLAGS: 00000006
RAX: 0000000000000001 RBX: 0000000000000246 RCX: 0000000000000002
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8c311580
RBP: ffffc9000130fa50 R08: 0000000000000000 R09: 0000000000000000
R10: fffffbfff1ae7266 R11: 0000000000000000 R12: 0000000000000000
R13: 1ffff92000261f58 R14: 0000000000000000 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6f17a11000 CR3: 000000001d5dd000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire+0x174/0x6c0 kernel/locking/lockdep.c:5437
rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:259
rcu_read_lock include/linux/rcupdate.h:648 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:404 [inline]
batadv_nc_worker+0xc8/0x5c0 net/batman-adv/network-coding.c:715
process_one_work+0x833/0x10c0 kernel/workqueue.c:2275
worker_thread+0xaa4/0x1460 kernel/workqueue.c:2421
kthread+0x39a/0x3c0 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296