rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 1-...!: (10499 ticks this GP) idle=8f7/1/0x4000000000000000 softirq=31347/31348 fqs=0
(t=10500 jiffies g=52905 q=47)
rcu: rcu_preempt kthread starved for 10500 jiffies! g52905 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt state:R running task stack:28696 pid: 14 ppid: 2 flags:0x00004000
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
schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1881
rcu_gp_fqs_loop+0x186/0x810 kernel/rcu/tree.c:1955
rcu_gp_kthread+0x1de/0x320 kernel/rcu/tree.c:2128
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 15922 Comm: syz-executor.1 Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__seqprop_spinlock_sequence include/linux/seqlock.h:277 [inline]
RIP: 0010:read_seqbegin include/linux/seqlock.h:840 [inline]
RIP: 0010:read_seqbegin_or_lock include/linux/seqlock.h:1144 [inline]
RIP: 0010:prepend_path+0x21e/0xea0 fs/d_path.c:165
Code: ff 89 c3 89 85 0c ff ff ff 83 e3 01 89 de e8 39 a7 9f ff 85 db 74 40 4c 8b ad 00 ff ff ff e8 09 a5 9f ff f3 90 41 0f b6 45 00 <84> c0 74 08 3c 03 0f 8e 5f 0b 00 00 44 8b 25 7f 25 89 09 31 ff 44
RSP: 0018:ffffc90004a77a20 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffc9000a84a000
RDX: 0000000000040000 RSI: ffffffff81d82167 RDI: 0000000000000003
RBP: ffffc90004a77b28 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff81d82190 R11: 0000000000000000 R12: 0000000000005023
R13: fffffbfff16c28e0 R14: dffffc0000000000 R15: dffffc0000000000
FS: 00007f7002995700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0475a3b004 CR3: 000000006f3ea000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
d_absolute_path+0xef/0x1a0 fs/d_path.c:233
tomoyo_get_absolute_path security/tomoyo/realpath.c:101 [inline]
tomoyo_realpath_from_path+0x288/0x620 security/tomoyo/realpath.c:276
tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
tomoyo_path_number_perm+0x1d5/0x590 security/tomoyo/file.c:723
security_file_ioctl+0x50/0xb0 security/security.c:1541
__do_sys_ioctl fs/ioctl.c:868 [inline]
__se_sys_ioctl fs/ioctl.c:860 [inline]
__x64_sys_ioctl+0xb3/0x200 fs/ioctl.c:860
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: 0033:0x7f700541f8a7
Code: 3c 1c 48 f7 d8 49 39 c4 72 b8 e8 04 54 02 00 85 c0 78 bd 48 83 c4 08 4c 89 e0 5b 41 5c c3 0f 1f 44 00 00 b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f70029930b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f7002994130 RCX: 00007f700541f8a7
RDX: 00007f7002993120 RSI: 0000000040085503 RDI: 0000000000000003
RBP: 0000000000000003 R08: 0000000000000303 R09: 00007f7002993128
R10: 00007f7002993180 R11: 0000000000000246 R12: 0000000800000000
R13: 0000000000000000 R14: 0000000000000008 R15: 00007f70054857fe
NMI backtrace for cpu 1
CPU: 1 PID: 15899 Comm: syz-executor.3 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_single_cpu_backtrace include/linux/nmi.h:164 [inline]
rcu_dump_cpu_stacks+0x25e/0x3f0 kernel/rcu/tree_stall.h:343
print_cpu_stall kernel/rcu/tree_stall.h:627 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:711 [inline]
rcu_pending kernel/rcu/tree.c:3878 [inline]
rcu_sched_clock_irq.cold+0x9d/0x746 kernel/rcu/tree.c:2597
update_process_times+0x16d/0x200 kernel/time/timer.c:1785
tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:226
tick_sched_timer+0x1b0/0x2d0 kernel/time/tick-sched.c:1421
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x1c0/0xe50 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
__sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1103
sysvec_apic_timer_interrupt+0x40/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:pie_calculate_probability+0x6b/0x7c0 net/sched/sch_pie.c:311
Code: c0 0f 85 b6 06 00 00 48 89 da 41 0f b6 6d 1a 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 07 07 00 00 48 8b 03 <31> ff 89 ee 48 89 04 24 e8 d8 57 23 fa 40 84 ed 0f 84 ee 05 00 00
RSP: 0018:ffffc90000dc0c50 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff8880347b2de0 RCX: 0000000000000100
RDX: 1ffff110068f65bc RSI: ffffffff8754721d RDI: ffff88807b37131a
RBP: 0000000000000000 R08: 0000000000000400 R09: 0000000000000000
R10: ffffffff8754bce5 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff88807b371300 R14: 0000000000000400 R15: ffff88807b371300
fq_pie_timer+0x170/0x2a0 net/sched/sch_fq_pie.c:383
call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1421
expire_timers kernel/time/timer.c:1466 [inline]
__run_timers.part.0+0x675/0xa20 kernel/time/timer.c:1734
__run_timers kernel/time/timer.c:1715 [inline]
run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1747
__do_softirq+0x29b/0x9c2 kernel/softirq.c:558
invoke_softirq kernel/softirq.c:432 [inline]
__irq_exit_rcu+0x123/0x180 kernel/softirq.c:636
irq_exit_rcu+0x5/0x20 kernel/softirq.c:648
sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:lock_release+0x3f1/0x720 kernel/locking/lockdep.c:5645
Code: 7e 83 f8 01 0f 85 8d 01 00 00 9c 58 f6 c4 02 0f 85 78 01 00 00 48 f7 04 24 00 02 00 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c5 48 c7 45 00 00 00 00 00 c7 45 08 00 00 00 00 48 8b 84 24
RSP: 0018:ffffc900046f70b0 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: e68fecc82667c61a RCX: 0000000000000000
RDX: 1ffff11006b1588b RSI: 0000000000000001 RDI: 0000000000000000
RBP: 1ffff920008dee18 R08: 0000000000000008 R09: ffffffff8fd5ba0f
R10: fffffbfff1fab741 R11: 0000000000000071 R12: 0000000000000006
R13: 0000000000000009 R14: ffff8880358ac458 R15: ffff8880358aba00
rcu_lock_release include/linux/rcupdate.h:273 [inline]
rcu_read_unlock include/linux/rcupdate.h:721 [inline]
mntput_no_expire+0x836/0xcd0 fs/namespace.c:1193
mntput+0x67/0x90 fs/namespace.c:1233
simple_recursive_removal+0x44f/0x760 fs/libfs.c:296
debugfs_remove fs/debugfs/inode.c:732 [inline]
debugfs_remove+0x59/0x80 fs/debugfs/inode.c:726
ieee80211_sta_debugfs_remove+0x34/0x70 net/mac80211/debugfs_sta.c:1075
__sta_info_destroy_part2+0x309/0x4e0 net/mac80211/sta_info.c:1104
__sta_info_flush+0x3e9/0x550 net/mac80211/sta_info.c:1222
sta_info_flush net/mac80211/sta_info.h:844 [inline]
ieee80211_ibss_disconnect+0x108/0x7b0 net/mac80211/ibss.c:695
ieee80211_ibss_leave+0x12/0x150 net/mac80211/ibss.c:1869
rdev_leave_ibss net/wireless/rdev-ops.h:555 [inline]
__cfg80211_leave_ibss+0x1a2/0x4d0 net/wireless/ibss.c:213
cfg80211_leave_ibss+0x54/0x70 net/wireless/ibss.c:231
cfg80211_change_iface+0xc8c/0xf50 net/wireless/util.c:1052
nl80211_set_interface+0x659/0x8c0 net/wireless/nl80211.c:3976
genl_family_rcv_msg_doit+0x228/0x320 net/netlink/genetlink.c:731
genl_family_rcv_msg net/netlink/genetlink.c:775 [inline]
genl_rcv_msg+0x328/0x580 net/netlink/genetlink.c:792
netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2491
genl_rcv+0x24/0x40 net/netlink/genetlink.c:803
netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1345
netlink_sendmsg+0x86d/0xda0 net/netlink/af_netlink.c:1916
sock_sendmsg_nosec net/socket.c:704 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:724
____sys_sendmsg+0x6e8/0x810 net/socket.c:2409
___sys_sendmsg+0xf3/0x170 net/socket.c:2463
__sys_sendmsg+0xe5/0x1b0 net/socket.c:2492
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: 0033:0x7f61dca96ae9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f61da00c188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f61dcba9f60 RCX: 00007f61dca96ae9
RDX: 0000000000000000 RSI: 0000000020000340 RDI: 0000000000000005
RBP: 00007f61dcaf0f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f61dd0ddb2f R14: 00007f61da00c300 R15: 0000000000022000
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 89 c3 mov %eax,%ebx
2: 89 85 0c ff ff ff mov %eax,-0xf4(%rbp)
8: 83 e3 01 and $0x1,%ebx
b: 89 de mov %ebx,%esi
d: e8 39 a7 9f ff callq 0xff9fa74b
12: 85 db test %ebx,%ebx
14: 74 40 je 0x56
16: 4c 8b ad 00 ff ff ff mov -0x100(%rbp),%r13
1d: e8 09 a5 9f ff callq 0xff9fa52b
22: f3 90 pause
24: 41 0f b6 45 00 movzbl 0x0(%r13),%eax
* 29: 84 c0 test %al,%al <-- trapping instruction
2b: 74 08 je 0x35
2d: 3c 03 cmp $0x3,%al
2f: 0f 8e 5f 0b 00 00 jle 0xb94
35: 44 8b 25 7f 25 89 09 mov 0x989257f(%rip),%r12d # 0x98925bb
3c: 31 ff xor %edi,%edi
3e: 44 rex.R