Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 1 UID: 0 PID: 23862 Comm: syz.3.4814 Tainted: G             L      syzkaller #0 PREEMPT_{RT,(full)} 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:strcmp+0x24/0xc0 lib/string.c:265
Code: 90 90 90 90 90 90 f3 0f 1e fa 55 41 57 41 56 41 54 53 48 bb 00 00 00 00 00 fc ff df 45 31 f6 4a 8d 04 37 48 89 c1 48 c1 e9 03 <0f> b6 0c 19 84 c9 75 28 42 0f b6 2c 37 4a 8d 04 36 48 89 c1 48 c1
RSP: 0018:ffffc900044e7a58 EFLAGS: 00010246
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: 0000000000000002 RSI: ffff88801c34a301 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8e3c3880 R12: ffffffff8e429630
R13: ffffffff8e429630 R14: 0000000000000000 R15: ffff888040a7f680
FS:  00007f09774566c0(0000) GS:ffff888125af2000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c344d13 CR3: 000000004c9f4000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 000000000000000e DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 remove_cache_mod kernel/trace/trace_events.c:948 [inline]
 cache_mod kernel/trace/trace_events.c:977 [inline]
 __ftrace_set_clr_event_nolock+0x78c/0xad0 kernel/trace/trace_events.c:1393
 __ftrace_set_clr_event kernel/trace/trace_events.c:1408 [inline]
 ftrace_set_clr_event+0x3d5/0x5c0 kernel/trace/trace_events.c:1458
 ftrace_event_write+0x201/0x2b0 kernel/trace/trace_events.c:1546
 vfs_write+0x29f/0xbb0 fs/read_write.c:685
 ksys_write+0x156/0x270 fs/read_write.c:739
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x17b/0x530 arch/x86/entry/syscall_64.c:85
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f09791fe0d9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d [ 1544.318250][T23862] Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f0977456028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f0979485fa0 RCX: 00007f09791fe0d9
RDX: 0000000000000018 RSI: 0000200000000400 RDI: 0000000000000008
RBP: 00007f0979295024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0979486038 R14: 00007f0979485fa0 R15: 00007ffcdac20c28
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:strcmp+0x24/0xc0 lib/string.c:265
Code: 90 90 90 90 90 90 f3 0f 1e fa 55 41 57 41 56 41 54 53 48 bb 00 00 00 00 00 fc ff df 45 31 f6 4a 8d 04 37 48 89 c1 48 c1 e9 03 <0f> b6 0c 19 84 c9 75 28 42 0f b6 2c 37 4a 8d 04 36 48 89 c1 48 c1
RSP: 0018:ffffc900044e7a58 EFLAGS: 00010246
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: 0000000000000002 RSI: ffff88801c34a301 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8e3c3880 R12: ffffffff8e429630
R13: ffffffff8e429630 R14: 0000000000000000 R15: ffff888040a7f680
FS:  00007f09774566c0(0000) GS:ffff888125af2000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c344d13 CR3: 000000004c9f4000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 000000000000000e DR6: 00000000ffff0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	90                   	nop
   1:	90                   	nop
   2:	90                   	nop
   3:	90                   	nop
   4:	90                   	nop
   5:	90                   	nop
   6:	f3 0f 1e fa          	endbr64
   a:	55                   	push   %rbp
   b:	41 57                	push   %r15
   d:	41 56                	push   %r14
   f:	41 54                	push   %r12
  11:	53                   	push   %rbx
  12:	48 bb 00 00 00 00 00 	movabs $0xdffffc0000000000,%rbx
  19:	fc ff df
  1c:	45 31 f6             	xor    %r14d,%r14d
  1f:	4a 8d 04 37          	lea    (%rdi,%r14,1),%rax
  23:	48 89 c1             	mov    %rax,%rcx
  26:	48 c1 e9 03          	shr    $0x3,%rcx
* 2a:	0f b6 0c 19          	movzbl (%rcx,%rbx,1),%ecx <-- trapping instruction
  2e:	84 c9                	test   %cl,%cl
  30:	75 28                	jne    0x5a
  32:	42 0f b6 2c 37       	movzbl (%rdi,%r14,1),%ebp
  37:	4a 8d 04 36          	lea    (%rsi,%r14,1),%rax
  3b:	48 89 c1             	mov    %rax,%rcx
  3e:	48                   	rex.W
  3f:	c1                   	.byte 0xc1