[  871.222575] watchdog: BUG: soft lockup - CPU#0 stuck for 36s! [syz-executor.6:14479]
[  871.295982] Modules linked in:
[  871.310291] CPU: 0 PID: 14479 Comm: syz-executor.6 Not tainted 5.13.19+ #6
[  871.340555] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014
[  871.374608] RIP: 0010:apparmor_cred_free+0x5f/0x1a0
[  871.488257] Code: 01 00 00 48 63 1d a1 fd 4d 02 49 03 5c 24 78 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 80 3c 02 00 0f 85 08 01 00 00 <4c> 8b 2b 4d 85 ed 74 68 e8 74 53 4b ff be 04 00 00 00 4c 89 ef bb
[  871.502804] RSP: 0018:ffff888056609dc8 EFLAGS: 00010246
[  871.515921] RAX: dffffc0000000000 RBX: ffff888005c8fc80 RCX: ffffffff967eb4fd
[  871.519366] RDX: 1ffff11000b91f90 RSI: 0000000000000100 RDI: ffff888005821000
[  871.523175] RBP: ffff888056609de8 R08: 0000000000000001 R09: ffffed1000b04201
[  871.547389] R10: ffff888005821003 R11: ffffed1000b04200 R12: ffff888005821000
[  871.558739] R13: ffff888005821000 R14: ffff888005821078 R15: ffff888007ba8000
[  871.565567] FS:  00007f5f81a40700(0000) GS:ffff888056600000(0000) knlGS:0000000000000000
[  871.645889] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  871.650339] CR2: 00007ffe8252bb80 CR3: 0000000003cf6006 CR4: 0000000000770ef0
[  871.657241] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  871.661329] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  871.665385] PKRU: 55555554
[  871.679526] Call Trace:
[  871.694248]  <IRQ>
[  871.695748]  security_cred_free+0x83/0x130
[  871.699949]  put_cred_rcu+0x71/0x360
[  871.707152]  rcu_core+0x536/0x12f0
[  871.710250]  ? rcu_barrier+0x3e0/0x3e0
[  871.712309]  ? lapic_next_deadline+0x2c/0x40
[  871.716156]  ? tick_program_event+0x88/0x110
[  871.725901]  rcu_core_si+0xe/0x10
[  871.730163]  __do_softirq+0x187/0x576
[  871.736365]  irq_exit_rcu+0x120/0x150
[  871.739508]  sysvec_apic_timer_interrupt+0x79/0x90
[  871.746547]  </IRQ>
[  871.747672]  <TASK>
[  871.748775]  asm_sysvec_apic_timer_interrupt+0x12/0x20
[  871.751145] RIP: 0010:0xffffffffc01e0801
[  871.763878] Code: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 0f 1f 44 00 00 <55> 48 89 e5 53 41 55 31 c0 45 31 ed 48 89 fb b8 ff ff ff 7f 41 5d
[  871.774799] RSP: 0018:ffff888006ec7d58 EFLAGS: 00000246
[  871.777359] RAX: ffffffffc01e07fc RBX: 000000007fff0000 RCX: ffffffff95ccef6a
[  871.780914] RDX: ffff888007ba8000 RSI: ffffc90000763048 RDI: ffff888006ec7e10
[  871.784406] RBP: ffff888006ec7eb8 R08: 0000000000000001 R09: ffffed1005374c87
[  871.788336] R10: ffff888029ba6437 R11: ffffed1005374c86 R12: ffff888006ec7e10
[  871.792724] R13: ffff888029ba6400 R14: ffffc90000763000 R15: dffffc0000000000
[  871.797513]  ? __seccomp_filter+0x1fa/0x1440
[  871.800358]  ? __seccomp_filter+0x220/0x1440
[  871.802457]  ? task_update_spec_tif+0x49/0x50
[  871.804805]  ? get_nth_filter+0x330/0x330
[  871.806670]  ? do_seccomp+0x6c5/0x2180
[  871.808329]  ? __schedule+0x8f5/0x1f00
[  871.810185]  ? fpu__clear+0x2c0/0x2c0
[  871.812454]  ? __secure_computing+0x205/0x370
[  871.814612]  ? syscall_trace_enter.isra.0+0xa0/0x1c0
[  871.817352]  ? syscall_enter_from_user_mode+0x2b/0x40
[  871.819784]  ? do_syscall_64+0x1c/0xb0
[  871.821640]  ? entry_SYSCALL_64_after_hwframe+0x44/0xae
[  871.824295]  </TASK>
[  871.827012] Sending NMI from CPU 0 to CPUs 1:
[  871.838583] NMI backtrace for cpu 1
[  871.838722] CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.13.19+ #6
[  871.838726] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014
[  871.838730] RIP: 0010:watchdog+0x1e1/0xa60
[  871.839448] Code: 45 a8 e8 e2 74 fd ff 49 8d 87 40 03 00 00 48 b9 00 00 00 00 00 fc ff df 48 89 45 c0 48 c1 e8 03 80 3c 08 00 0f 85 dd 07 00 00 <49> 8b 9f 40 03 00 00 48 be 00 00 00 00 00 fc ff df 4c 8d 63 10 4c
[  871.839456] RSP: 0000:ffff888001d77ea0 EFLAGS: 00010246
[  871.839462] RAX: 1ffff11000dea98b RBX: ffff88800669b630 RCX: dffffc0000000000
[  871.839466] RDX: ffff888001d6a080 RSI: 0000000000000000 RDI: ffff888005e4c918
[  871.839470] RBP: ffff888001d77f00 R08: 0000000000000001 R09: fffffbfff34354d9
[  871.839474] R10: ffffffff9a1aa6c7 R11: fffffbfff34354d8 R12: ffff88800669c010
[  871.839660] R13: 00000000003fff85 R14: 0000000100021a4b R15: ffff888006f54918
[  871.839666] FS:  0000000000000000(0000) GS:ffff888056700000(0000) knlGS:0000000000000000
[  871.839670] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  871.839673] CR2: 00007ffcc3c83ce8 CR3: 0000000004310004 CR4: 0000000000770ee0
[  871.839678] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  871.839682] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  871.839685] PKRU: 55555554
[  871.839687] Call Trace:
[  871.839690]  <TASK>
[  871.839692]  ? reset_hung_task_detector+0x30/0x30
[  871.839695]  kthread+0x352/0x430
[  871.839698]  ? set_kthread_struct+0x120/0x120
[  871.839701]  ret_from_fork+0x1f/0x30
[  871.839703]  </TASK>

VM DIAGNOSIS:
03:12:49  Registers:
info registers vcpu 0
RAX=dffffc0000000060 RBX=00000000000003fd RCX=0000000000000000 RDX=00000000000003fd
RSI=0000000000000100 RDI=ffffffff9a5087c8 RBP=ffff888056609590 RSP=ffff888056609580
R8 =0000000000000001 R9 =ffffed100acc12be R10=0000000000000003 R11=ffffed100acc12bd
R12=ffffffff9a5087c0 R13=0000000000000020 R14=fffffbfff34a113f R15=fffffbfff34a10fb
RIP=ffffffff96eb48d0 RFL=00000002 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =0000 0000000000000000 000fffff 00000000
CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA]
SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS   [-WA]
DS =0000 0000000000000000 000fffff 00000000
FS =0000 00007f5f81a40700 000fffff 00000000
GS =0000 ffff888056600000 000fffff 00000000
LDT=0000 0000000000000000 000fffff 00000000
TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy
GDT=     fffffe0000001000 0000007f
IDT=     fffffe0000000000 00000fff
CR0=80050033 CR2=00007ffe8252bb80 CR3=0000000003cf6006 CR4=00770ef0
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 
DR6=00000000fffe0ff0 DR7=0000000000000400
EFER=0000000000000d01
FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80
FPR0=0000000000000000 0000 FPR1=0000000000000000 0000
FPR2=0000000000000000 0000 FPR3=0000000000000000 0000
FPR4=0000000000000000 0000 FPR5=0000000000000000 0000
FPR6=0000000000000000 0000 FPR7=0000000000000000 0000
XMM00=00000000000000000000000000000000 XMM01=00000000000000000000000000000000
XMM02=00007f5f829c76c000007f5f829c76a8 XMM03=00007f5f829c76a000007f5f829c76a0
XMM04=0000000000000000000000ff00000000 XMM05=00000000000000000000000000001000
XMM06=65271e71f6db48dec87a5451fee77608 XMM07=8e1975cd7469a455d0c6427f6f635662
XMM08=980871ab6ebce86a7ad70d1fd84c1958 XMM09=00000000000000000000000000000000
XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000
XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000
XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000
info registers vcpu 1
RAX=ffffffff9715fae0 RBX=ffff88800510c800 RCX=0000000000000000 RDX=ffff88802ac9c100
RSI=0000000000000000 RDI=ffffffff987f3070 RBP=ffff888004687d90 RSP=ffff888004687cc0
R8 =0000000000000001 R9 =ffffed1000a2f5ac R10=ffff88800517ad5f R11=ffffed1000a2f5ab
R12=ffffffff987f3040 R13=ffff88800517ad00 R14=ffff888004687d68 R15=ffff88800517ad48
RIP=ffffffff9691411b RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =0000 0000000000000000 000fffff 00000100
CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA]
SS =0000 0000000000000000 ffffffff 00c00100
DS =0000 0000000000000000 000fffff 00000100
FS =0000 0000000000000000 000fffff 00000100
GS =0000 ffff888056700000 000fffff 00000100
LDT=0000 0000000000000000 00000000 00000000
TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy
GDT=     fffffe0000048000 0000007f
IDT=     fffffe0000000000 00000fff
CR0=80050033 CR2=00007ffcc3c83ce8 CR3=0000000003cf6005 CR4=00770ee0
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 
DR6=00000000fffe0ff0 DR7=0000000000000400
EFER=0000000000000d01
FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80
FPR0=0000000000000000 0000 FPR1=0000000000000000 0000
FPR2=0000000000000000 0000 FPR3=0000000000000000 0000
FPR4=0000000000000000 0000 FPR5=0000000000000000 0000
FPR6=0000000000000000 0000 FPR7=0000000000000000 0000
XMM00=00007ffcc3c8475f00007ffcc3c84360 XMM01=000000000000000000007ffcc3c8475f
XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000
XMM04=00000000000000000000ff00000000ff XMM05=00000000000000000000000000000000
XMM06=0000000000000000000000524f525245 XMM07=00000000000000000000000000000000
XMM08=000000000000000000524f5252450040 XMM09=00000000000000000000000000000000
XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000
XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000
XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000