------------[ cut here ]------------
WARNING: CPU: 1 PID: 2963 at mm/maccess.c:226 copy_from_user_nofault+0x15c/0x1c0
Modules linked in:
CPU: 1 PID: 2963 Comm: udevd Not tainted 5.15.156-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:copy_from_user_nofault+0x15c/0x1c0 mm/maccess.c:226
Code: db 48 c7 c0 f2 ff ff ff 48 0f 44 c5 eb 0c e8 db d7 d5 ff 48 c7 c0 f2 ff ff ff 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 c4 d7 d5 ff <0f> 0b e9 1e ff ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c ef fe ff
RSP: 0018:ffffc90000dd09f0 EFLAGS: 00010246
RAX: ffffffff81aa851c RBX: 0000000000000000 RCX: ffff88807ca93b80
RDX: 0000000000000101 RSI: 0000000000000000 RDI: 0000000000000000
RBP: dffffc0000000000 R08: ffffffff81aa842d R09: ffffed100f952771
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: ffffc90000dd0a68
FS:  00007f30cccaac80(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2f322000 CR3: 0000000012be9000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 bpf_probe_read_user_common kernel/trace/bpf_trace.c:157 [inline]
 ____bpf_probe_read_compat kernel/trace/bpf_trace.c:281 [inline]
 bpf_probe_read_compat+0xe4/0x180 kernel/trace/bpf_trace.c:277
 bpf_prog_3d2613b5dfc7747f+0x32/0x4d4
 bpf_dispatcher_nop_func include/linux/bpf.h:785 [inline]
 __bpf_prog_run include/linux/filter.h:628 [inline]
 bpf_prog_run include/linux/filter.h:635 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:1880 [inline]
 bpf_trace_run3+0x1d1/0x380 kernel/trace/bpf_trace.c:1918
 __bpf_trace_kmem_cache_free+0x99/0xc0 include/trace/events/kmem.h:138
 trace_kmem_cache_free include/trace/events/kmem.h:138 [inline]
 kmem_cache_free+0x1ce/0x1f0 mm/slub.c:3516
 rcu_do_batch kernel/rcu/tree.c:2523 [inline]
 rcu_core+0xa15/0x1650 kernel/rcu/tree.c:2763
 __do_softirq+0x3b3/0x93a kernel/softirq.c:558
 invoke_softirq kernel/softirq.c:432 [inline]
 __irq_exit_rcu+0x155/0x240 kernel/softirq.c:637
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:649
 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1096
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:__should_failslab+0x23/0xd0 mm/failslab.c:20
Code: 5e 41 5f c3 cc cc cc 55 41 56 53 89 f5 48 89 fb 48 c7 c0 28 10 44 91 48 c1 e8 03 49 be 00 00 00 00 00 fc ff df 42 80 3c 30 00 <74> 0c 48 c7 c7 28 10 44 91 e8 0f ef ff ff f7 c5 00 80 00 00 75 3d
RSP: 0018:ffffc900012dfcc0 EFLAGS: 00000246
RAX: 1ffffffff2288205 RBX: ffff888011dec500 RCX: ffff88807ca93b80
RDX: ffff88807ca93b80 RSI: 0000000000000cc0 RDI: ffff888011dec500
RBP: 0000000000000cc0 R08: dffffc0000000000 R09: fffffbfff1bc8b5e
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888011dec500
R13: 1ffff9200025bfd0 R14: dffffc0000000000 R15: 0000000000000001
 should_failslab+0x5/0x20 mm/slab_common.c:1337
 slab_pre_alloc_hook+0x53/0xc0 mm/slab.h:494
 slab_alloc_node mm/slub.c:3134 [inline]
 slab_alloc mm/slub.c:3228 [inline]
 kmem_cache_alloc+0x3f/0x280 mm/slub.c:3233
 getname_flags+0xb8/0x4e0 fs/namei.c:138
 user_path_at_empty+0x2a/0x180 fs/namei.c:2882
 do_readlinkat+0x114/0x3a0 fs/stat.c:442
 __do_sys_readlink fs/stat.c:475 [inline]
 __se_sys_readlink fs/stat.c:472 [inline]
 __x64_sys_readlink+0x7b/0x90 fs/stat.c:472
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f30ccdd6d47
Code: 73 01 c3 48 8b 0d e1 90 0d 00 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 59 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d b1 90 0d 00 f7 d8 64 89 01 48
RSP: 002b:00007fffd6819c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000059
RAX: ffffffffffffffda RBX: 00007fffd6819c78 RCX: 00007f30ccdd6d47
RDX: 0000000000000400 RSI: 00007fffd6819c78 RDI: 00007fffd681a158
RBP: 0000000000000400 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000010f R11: 0000000000000246 R12: 00007fffd681a158
R13: 00007fffd681a0c8 R14: 000055597083c910 R15: 0000000000000000
 </TASK>
----------------
Code disassembly (best guess):
   0:	5e                   	pop    %rsi
   1:	41 5f                	pop    %r15
   3:	c3                   	ret
   4:	cc                   	int3
   5:	cc                   	int3
   6:	cc                   	int3
   7:	55                   	push   %rbp
   8:	41 56                	push   %r14
   a:	53                   	push   %rbx
   b:	89 f5                	mov    %esi,%ebp
   d:	48 89 fb             	mov    %rdi,%rbx
  10:	48 c7 c0 28 10 44 91 	mov    $0xffffffff91441028,%rax
  17:	48 c1 e8 03          	shr    $0x3,%rax
  1b:	49 be 00 00 00 00 00 	movabs $0xdffffc0000000000,%r14
  22:	fc ff df
  25:	42 80 3c 30 00       	cmpb   $0x0,(%rax,%r14,1)
* 2a:	74 0c                	je     0x38 <-- trapping instruction
  2c:	48 c7 c7 28 10 44 91 	mov    $0xffffffff91441028,%rdi
  33:	e8 0f ef ff ff       	call   0xffffef47
  38:	f7 c5 00 80 00 00    	test   $0x8000,%ebp
  3e:	75 3d                	jne    0x7d