INFO: task syz-executor.2:30944 blocked for more than 143 seconds.
Not tainted 5.15.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:27584 pid:30944 ppid: 12263 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4969 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6250
schedule+0xd2/0x260 kernel/sched/core.c:6323
rwsem_down_write_slowpath+0x761/0x1130 kernel/locking/rwsem.c:1117
__down_write_common kernel/locking/rwsem.c:1272 [inline]
__down_write_common kernel/locking/rwsem.c:1269 [inline]
__down_write kernel/locking/rwsem.c:1281 [inline]
down_write+0x135/0x150 kernel/locking/rwsem.c:1528
inode_lock include/linux/fs.h:783 [inline]
lock_mount+0x8a/0x2e0 fs/namespace.c:2242
do_new_mount_fc fs/namespace.c:2931 [inline]
do_new_mount fs/namespace.c:2990 [inline]
path_mount+0x14c6/0x1fa0 fs/namespace.c:3318
do_mount fs/namespace.c:3331 [inline]
__do_sys_mount fs/namespace.c:3539 [inline]
__se_sys_mount fs/namespace.c:3516 [inline]
__x64_sys_mount+0x27f/0x300 fs/namespace.c:3516
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: 0033:0x7f10e8011ae9
RSP: 002b:00007f10e5545188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f10e81250e0 RCX: 00007f10e8011ae9
RDX: 0000000020000140 RSI: 0000000020000200 RDI: 0000000000000000
RBP: 00007f10e806bf6d R08: 0000000020000380 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff4171ac0f R14: 00007f10e5545300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8b983b60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
1 lock held by in:imklog/6226:
2 locks held by kworker/u4:6/7851:
2 locks held by syz-executor.2/30901:
#0: ffff88801318a460 (sb_writers#20){.+.+}-{0:0}, at: filename_create+0xf3/0x480 fs/namei.c:3649
#1: ffff88806c108298 (&sb->s_type->i_mutex_key#26/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:818 [inline]
#1: ffff88806c108298 (&sb->s_type->i_mutex_key#26/1){+.+.}-{3:3}, at: filename_create+0x158/0x480 fs/namei.c:3654
1 lock held by syz-executor.2/30944:
#0: ffff88806c108298 (&sb->s_type->i_mutex_key#28){++++}-{3:3}, at: inode_lock include/linux/fs.h:783 [inline]
#0: ffff88806c108298 (&sb->s_type->i_mutex_key#28){++++}-{3:3}, at: lock_mount+0x8a/0x2e0 fs/namespace.c:2242
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.15.0-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:105
nmi_trigger_cpumask_backtrace+0x1ae/0x220 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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 1047 Comm: kworker/u4:5 Not tainted 5.15.0-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+0x1f/0x510 kernel/locking/lockdep.c:5605
Code: fe ff ff 0f 1f 84 00 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 41 57 41 89 f7 41 56 49 89 fe 41 55 41 89 d5 41 54 41 89 cc 55 <44> 89 c5 53 48 81 ec b0 00 00 00 48 8d 5c 24 10 4c 89 0c 24 48 c7
RSP: 0018:ffffc90004567c58 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: ffff888078f68190 RCX: 0000000000000002
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8b983b60
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff88d73a81 R11: 0000000000000000 R12: 0000000000000002
R13: 0000000000000000 R14: ffffffff8b983b60 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efd9c0402a0 CR3: 000000007ac6b000 CR4: 0000000000350ee0
Call Trace:
rcu_lock_acquire include/linux/rcupdate.h:268 [inline]
rcu_read_lock include/linux/rcupdate.h:688 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline]
batadv_nc_worker+0x12d/0xfa0 net/batman-adv/network-coding.c:723
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), 3 bytes skipped:
0: 0f 1f 84 00 00 00 00 nopl 0x0(%rax,%rax,1)
7: 00
8: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
f: fc ff df
12: 41 57 push %r15
14: 41 89 f7 mov %esi,%r15d
17: 41 56 push %r14
19: 49 89 fe mov %rdi,%r14
1c: 41 55 push %r13
1e: 41 89 d5 mov %edx,%r13d
21: 41 54 push %r12
23: 41 89 cc mov %ecx,%r12d
26: 55 push %rbp
* 27: 44 89 c5 mov %r8d,%ebp <-- trapping instruction
2a: 53 push %rbx
2b: 48 81 ec b0 00 00 00 sub $0xb0,%rsp
32: 48 8d 5c 24 10 lea 0x10(%rsp),%rbx
37: 4c 89 0c 24 mov %r9,(%rsp)
3b: 48 rex.W
3c: c7 .byte 0xc7