INFO: task syz-executor.4:15662 blocked for more than 143 seconds.
Not tainted 5.19.0-rc1-syzkaller-00003-ge71e60cd74df #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:25600 pid:15662 ppid: 3646 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5116 [inline]
__schedule+0x957/0xec0 kernel/sched/core.c:6428
schedule+0xeb/0x1b0 kernel/sched/core.c:6500
schedule_timeout+0xac/0x300 kernel/time/timer.c:1911
do_wait_for_common+0x3ea/0x560 kernel/sched/completion.c:85
__wait_for_common kernel/sched/completion.c:106 [inline]
wait_for_common kernel/sched/completion.c:117 [inline]
wait_for_completion+0x46/0x60 kernel/sched/completion.c:138
kthread_stop+0xf8/0x200 kernel/kthread.c:708
ext4_stop_mmpd+0x43/0xb0 fs/ext4/mmp.c:255
__ext4_fill_super+0x6b0e/0x9a50 fs/ext4/super.c:5450
ext4_fill_super+0x30d/0x6f0 fs/ext4/super.c:5499
get_tree_bdev+0x400/0x620 fs/super.c:1292
vfs_get_tree+0x88/0x270 fs/super.c:1497
do_new_mount+0x289/0xad0 fs/namespace.c:3040
do_mount fs/namespace.c:3383 [inline]
__do_sys_mount fs/namespace.c:3591 [inline]
__se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3568
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7fca2248a63a
RSP: 002b:00007fca2369bf88 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007fca2248a63a
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fca2369bfe0
RBP: 00007fca2369c020 R08: 00007fca2369c020 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000
R13: 0000000020000100 R14: 00007fca2369bfe0 R15: 00000000200000c0
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8cb1eb60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
1 lock held by hwrng/755:
#0: ffffffff8d24c948 (reading_mutex){+.+.}-{3:3}, at: hwrng_fillfn+0xec/0x470 drivers/char/hw_random/core.c:503
1 lock held by klogd/2968:
#0: ffff8880b9b39b98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x25/0x110 kernel/sched/core.c:544
2 locks held by getty/3291:
#0: ffff88802717f098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc90002cd62e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6e8/0x1e50 drivers/tty/n_tty.c:2124
1 lock held by syz-executor.4/15662:
#0: ffff88807b6dc0e0 (&type->s_umount_key#27/1){+.+.}-{3:3}, at: alloc_super+0x1c5/0x820 fs/super.c:228
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 5.19.0-rc1-syzkaller-00003-ge71e60cd74df #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+0x1e3/0x2cb lib/dump_stack.c:106
nmi_cpu_backtrace+0x473/0x4a0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x168/0x280 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0xd18/0xd60 kernel/hung_task.c:378
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 3698 Comm: kworker/u4:6 Not tainted 5.19.0-rc1-syzkaller-00003-ge71e60cd74df #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+0x32/0x400 kernel/locking/lockdep.c:5633
Code: 41 55 41 54 53 48 83 e4 e0 48 81 ec 20 01 00 00 44 89 c3 41 89 f7 49 89 fe 65 48 8b 04 25 28 00 00 00 48 89 84 24 00 01 00 00 <49> bc 00 00 00 00 00 fc ff df 48 c7 44 24 40 b3 8a b5 41 48 c7 44
RSP: 0018:ffffc9000428fa00 EFLAGS: 00000286
RAX: 58d928e8fec76a00 RBX: 0000000000000000 RCX: 0000000000000002
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8cb1eb60
RBP: ffffc9000428fb50 R08: 0000000000000000 R09: 0000000000000000
R10: fffffbfff1c06fc6 R11: 1ffffffff1c06fc5 R12: dffffc0000000000
R13: ffff88802f690c80 R14: ffffffff8cb1eb60 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c010790408 CR3: 0000000027e44000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:269
rcu_read_lock include/linux/rcupdate.h:695 [inline]
batadv_nc_process_nc_paths+0xc1/0x370 net/batman-adv/network-coding.c:687
batadv_nc_worker+0x4d5/0x5b0 net/batman-adv/network-coding.c:735
process_one_work+0x81c/0xd10 kernel/workqueue.c:2289
worker_thread+0xb14/0x1330 kernel/workqueue.c:2436
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30
----------------
Code disassembly (best guess):
0: 41 55 push %r13
2: 41 54 push %r12
4: 53 push %rbx
5: 48 83 e4 e0 and $0xffffffffffffffe0,%rsp
9: 48 81 ec 20 01 00 00 sub $0x120,%rsp
10: 44 89 c3 mov %r8d,%ebx
13: 41 89 f7 mov %esi,%r15d
16: 49 89 fe mov %rdi,%r14
19: 65 48 8b 04 25 28 00 mov %gs:0x28,%rax
20: 00 00
22: 48 89 84 24 00 01 00 mov %rax,0x100(%rsp)
29: 00
* 2a: 49 bc 00 00 00 00 00 movabs $0xdffffc0000000000,%r12 <-- trapping instruction
31: fc ff df
34: 48 c7 44 24 40 b3 8a movq $0x41b58ab3,0x40(%rsp)
3b: b5 41
3d: 48 rex.W
3e: c7 .byte 0xc7
3f: 44 rex.R