INFO: task syz-executor.2:24008 blocked for more than 143 seconds.
Not tainted 6.1.0-syzkaller-11674-g84e57d292203 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:26696 pid:24008 ppid:8953 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x9d1/0xe40 kernel/sched/core.c:6555
schedule+0xcb/0x190 kernel/sched/core.c:6631
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6690
__mutex_lock_common+0xecf/0x26c0 kernel/locking/mutex.c:679
__mutex_lock kernel/locking/mutex.c:747 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:799
cgroup_do_get_tree+0x1a9/0x670 kernel/cgroup/cgroup.c:2170
cgroup_get_tree+0xb7/0x220 kernel/cgroup/cgroup.c:2217
vfs_get_tree+0x88/0x270 fs/super.c:1489
do_new_mount+0x289/0xad0 fs/namespace.c:3145
do_mount fs/namespace.c:3488 [inline]
__do_sys_mount fs/namespace.c:3697 [inline]
__se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3674
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+0x63/0xcd
RIP: 0033:0x7ff96148c0d9
RSP: 002b:00007ff9622cc168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ff9615abf80 RCX: 00007ff96148c0d9
RDX: 0000000020000040 RSI: 00000000200000c0 RDI: 0000000000000000
RBP: 00007ff9614e7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc524f264f R14: 00007ff9622cc300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8d523790 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 kernel/rcu/tasks.h:507
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8d523f90 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 kernel/rcu/tasks.h:507
1 lock held by khungtaskd/28:
#0: ffffffff8d5235c0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/4747:
#0: ffff88802835c098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc900015b02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6e8/0x1e50 drivers/tty/n_tty.c:2177
3 locks held by kworker/1:6/5157:
#0: ffff888012864d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x796/0xd10 kernel/workqueue.c:2262
#1: ffffc9000525fd00 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0xd10 kernel/workqueue.c:2264
#2: ffff88803a88a240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x2df/0x58a0 drivers/net/netdevsim/fib.c:1489
4 locks held by syz-executor.5/24005:
2 locks held by syz-executor.2/24008:
#0: ffff88802bb680e0 (&type->s_umount_key#60){++++}-{3:3}, at: grab_super+0x58/0x190 fs/super.c:386
#1: ffffffff8d54b1a8 (cgroup_mutex){+.+.}-{3:3}, at: cgroup_do_get_tree+0x1a9/0x670 kernel/cgroup/cgroup.c:2170
1 lock held by syz-executor.2/24077:
#0: ffff88802bb680e0 (&type->s_umount_key#60){++++}-{3:3}, at: grab_super+0x58/0x190 fs/super.c:386
1 lock held by syz-executor.5/24091:
#0: ffff88802bb680e0 (&type->s_umount_key#60){++++}-{3:3}, at: grab_super+0x58/0x190 fs/super.c:386
1 lock held by syz-executor.4/24111:
#0: ffff88802bb680e0 (&type->s_umount_key#60){++++}-{3:3}, at: grab_super+0x58/0x190 fs/super.c:386
1 lock held by syz-executor.2/24149:
#0: ffff88802bb680e0 (&type->s_umount_key#60){++++}-{3:3}, at: grab_super+0x58/0x190 fs/super.c:386
1 lock held by syz-executor.5/24163:
#0: ffff88802bb680e0 (&type->s_umount_key#60){++++}-{3:3}, at: grab_super+0x58/0x190 fs/super.c:386
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.1.0-syzkaller-11674-g84e57d292203 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x4e3/0x560 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x19b/0x3e0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0xcd5/0xd20 kernel/hung_task.c:377
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 21 Comm: ksoftirqd/1 Not tainted 6.1.0-syzkaller-11674-g84e57d292203 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
RIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:236 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x1c/0xa0 kernel/kcov.c:304
Code: 48 83 ce 18 4c 89 0c 31 4c 89 44 f9 20 c3 4c 8b 04 24 65 48 8b 14 25 40 98 03 00 65 8b 0d 54 d3 75 7e f7 c1 00 01 ff 00 74 11 c1 00 01 00 00 74 7b 83 ba 6c 15 00 00 00 74 72 8b 8a 48 15 00
RSP: 0018:ffffc900001b7118 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 0000000000000001 RCX: 0000000000000100
RDX: ffff888012a59d40 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900001b7228 R08: ffffffff899804a8 R09: fffffbfff212e431
R10: fffffbfff212e431 R11: 1ffffffff212e430 R12: ffff88807ca70c80
R13: dffffc0000000000 R14: ffff888022a0cb00 R15: 1ffff92000036e2c
FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555569c5848 CR3: 000000007816f000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
nf_hook+0x138/0x3d0 include/linux/netfilter.h:229
NF_HOOK include/linux/netfilter.h:300 [inline]
__br_forward+0x43d/0x710 net/bridge/br_forward.c:115
deliver_clone net/bridge/br_forward.c:131 [inline]
maybe_deliver net/bridge/br_forward.c:189 [inline]
br_flood+0x683/0x890 net/bridge/br_forward.c:231
br_handle_frame_finish+0x1688/0x1d60 net/bridge/br_input.c:210
nf_hook_bridge_pre net/bridge/br_input.c:294 [inline]
br_handle_frame+0xb89/0x1310 net/bridge/br_input.c:416
__netif_receive_skb_core+0x1408/0x3c10 net/core/dev.c:5376
__netif_receive_skb_one_core net/core/dev.c:5480 [inline]
__netif_receive_skb+0x11a/0x500 net/core/dev.c:5596
process_backlog+0x568/0x920 net/core/dev.c:5924
__napi_poll+0xbe/0x4b0 net/core/dev.c:6485
napi_poll net/core/dev.c:6552 [inline]
net_rx_action+0x76c/0x1100 net/core/dev.c:6663
__do_softirq+0x277/0x75b kernel/softirq.c:571
run_ksoftirqd+0xc1/0x120 kernel/softirq.c:934
smpboot_thread_fn+0x533/0xa10 kernel/smpboot.c:164
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308