rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...0: (0 ticks this GP) idle=e47/1/0x4000000000000000 softirq=27078/27078 fqs=5241 
	(detected by 0, t=10502 jiffies, g=39989, q=1305)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 16406 Comm: syz-executor.1 Not tainted 5.15.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:check_kcov_mode kernel/kcov.c:163 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x7/0x60 kernel/kcov.c:197
Code: fd ff ff b9 ff ff ff ff ba 08 00 00 00 4d 8b 03 48 0f bd ca 49 8b 45 00 48 63 c9 e9 64 ff ff ff 0f 1f 00 65 8b 05 d9 17 8b 7e <89> c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b 14 25 40 f0 01 00 a9
RSP: 0018:ffffc90000dc0dc8 EFLAGS: 00000006
RAX: 0000000000010001 RBX: ffff88807e432b40 RCX: 0000000000000000
RDX: 1ffff1100efada86 RSI: ffffffff8753e550 RDI: ffff888077d6d430
RBP: ffff888077d6d400 R08: 17d82fc02fb05f80 R09: 0000000000000003
R10: ffffffff8753e1dd R11: 0000000000000000 R12: ffff888077957300
R13: ffff888077957300 R14: 17d82fc02fb05f80 R15: 17d82fc0afb05f81
FS:  0000555556751400(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f20e1c6b558 CR3: 0000000089cb5000 CR4: 0000000000350ee0
Call Trace:
 <IRQ>
 advance_sched+0x22f/0x9a0 net/sched/sch_taprio.c:743
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x609/0xe50 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+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1097
 </IRQ>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:user_access_begin arch/x86/include/asm/uaccess.h:478 [inline]
RIP: 0010:strncpy_from_user+0x129/0x3e0 lib/strncpy_from_user.c:138
Code: 48 85 db 0f 85 2e 02 00 00 e8 23 59 83 fd 4c 89 f6 4c 89 ff e8 78 5e 83 fd 4d 39 fe 0f 87 15 02 00 00 e8 0a 59 83 fd 0f 01 cb <0f> ae e8 bf 07 00 00 00 48 89 ee e8 57 5e 83 fd 48 83 fd 07 0f 87
RSP: 0018:ffffc90004b7fe60 EFLAGS: 00040293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff888092bf3900 RSI: ffffffff83f37f16 RDI: 0000000000000003
RBP: 0000000000000fe0 R08: 00007ffffffff000 R09: 0000000000000001
R10: ffffffff83f37f08 R11: 0000000000000000 R12: 00007f52bba9dd16
R13: ffff888077629120 R14: 00007f52bba9ecf6 R15: 00007ffffffff000
 getname_flags.part.0+0x95/0x4f0 fs/namei.c:149
 getname_flags+0x9a/0xe0 include/linux/audit.h:319
 getname fs/namei.c:217 [inline]
 __do_sys_symlink fs/namei.c:4301 [inline]
 __se_sys_symlink fs/namei.c:4299 [inline]
 __x64_sys_symlink+0x56/0x90 fs/namei.c:4299
 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: 0033:0x7f52bba43347
Code: 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 58 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:00007ffdf135b368 EFLAGS: 00000202 ORIG_RAX: 0000000000000058
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f52bba43347
RDX: 00007ffdf135b443 RSI: 00007f52bba9dd16 RDI: 00007ffdf135b430
RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffdf135b200
R10: 00007ffdf135b0b7 R11: 0000000000000202 R12: 0000000000000001
R13: 0000000000000001 R14: 0000000000000001 R15: 00007ffdf135b430
----------------
Code disassembly (best guess), 3 bytes skipped:
   0:	b9 ff ff ff ff       	mov    $0xffffffff,%ecx
   5:	ba 08 00 00 00       	mov    $0x8,%edx
   a:	4d 8b 03             	mov    (%r11),%r8
   d:	48 0f bd ca          	bsr    %rdx,%rcx
  11:	49 8b 45 00          	mov    0x0(%r13),%rax
  15:	48 63 c9             	movslq %ecx,%rcx
  18:	e9 64 ff ff ff       	jmpq   0xffffff81
  1d:	0f 1f 00             	nopl   (%rax)
  20:	65 8b 05 d9 17 8b 7e 	mov    %gs:0x7e8b17d9(%rip),%eax        # 0x7e8b1800
* 27:	89 c1                	mov    %eax,%ecx <-- trapping instruction
  29:	48 8b 34 24          	mov    (%rsp),%rsi
  2d:	81 e1 00 01 00 00    	and    $0x100,%ecx
  33:	65 48 8b 14 25 40 f0 	mov    %gs:0x1f040,%rdx
  3a:	01 00
  3c:	a9                   	.byte 0xa9