------------[ cut here ]------------
WARNING: CPU: 0 PID: 4198 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 0 PID: 4198 Comm: udevd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Code: 24 45 31 f6 31 ff 89 de e8 0d f6 d8 ff 85 db 48 c7 c0 f2 ff ff ff 49 0f 44 c6 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 90 f2 d8 ff <0f> 0b e9 1c ff ff ff 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c ea fe
RSP: 0018:ffffc900000079a8 EFLAGS: 00010246
RAX: ffffffff819ed980 RBX: 0000000000000008 RCX: ffff888019bc3b80
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffffbfff1ff5419
R10: fffffbfff1ff5419 R11: 1ffffffff1ff5418 R12: ffff888019bc5308
R13: dffffc0000000000 R14: ffffc90000007a08 R15: ffffffffa3000000
FS:  00007f150b11f880(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000021e030 CR3: 00000000635a1000 CR4: 00000000003506f0
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_user kernel/trace/bpf_trace.c:166 [inline]
 bpf_probe_read_user+0x26/0x70 kernel/trace/bpf_trace.c:163
 bpf_prog_b01026b2908340f4+0x3d/0x8d8
 bpf_dispatcher_nop_func include/linux/bpf.h:888 [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:1878 [inline]
 bpf_trace_run2+0x15b/0x2d0 kernel/trace/bpf_trace.c:1915
 __bpf_trace_kfree+0x6e/0x90 include/trace/events/kmem.h:118
 trace_kfree include/trace/events/kmem.h:118 [inline]
 kfree+0x25f/0x2a0 mm/slub.c:4554
 security_cred_free+0xbc/0xf0 security/security.c:1719
 put_cred_rcu+0xdd/0x3e0 kernel/cred.c:115
 rcu_do_batch kernel/rcu/tree.c:2523 [inline]
 rcu_core+0x962/0x15d0 kernel/rcu/tree.c:2763
 handle_softirqs+0x328/0x820 kernel/softirq.c:576
 __do_softirq kernel/softirq.c:610 [inline]
 invoke_softirq kernel/softirq.c:450 [inline]
 __irq_exit_rcu+0x12f/0x220 kernel/softirq.c:659
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:671
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:should_fail+0x139/0x4c0 lib/fault-inject.c:106
Code: 00 00 00 e8 a9 57 c5 fd f0 45 29 37 eb 4a 65 4c 8b 3d 0b 91 0b 7c 49 81 c7 d4 15 00 00 4d 89 fd 49 c1 ed 03 43 0f b6 44 25 00 <84> c0 0f 85 6b 02 00 00 41 8b 2f 85 ed 0f 84 e4 fe ff ff ff cd 43
RSP: 0018:ffffc90002fffa08 EFLAGS: 00000a03
RAX: 0000000000000000 RBX: ffffffff8c1f10e0 RCX: d953bc97f067f200
RDX: ffff888019bc3b80 RSI: 0000000000001000 RDI: ffffffff8c1f10e0
RBP: 0000000000000dc0 R08: dffffc0000000000 R09: fffffbfff1ad26b6
R10: fffffbfff1ad26b6 R11: 1ffffffff1ad26b5 R12: dffffc0000000000
R13: 1ffff11003378a2a R14: 0000000000001000 R15: ffff888019bc5154
 should_failslab+0x5/0x20 mm/slab_common.c:1350
 slab_pre_alloc_hook+0x51/0xc0 mm/slab.h:494
 slab_alloc_node mm/slub.c:3139 [inline]
 slab_alloc mm/slub.c:3233 [inline]
 kmem_cache_alloc_trace+0x47/0x2a0 mm/slub.c:3250
 kmalloc include/linux/slab.h:607 [inline]
 kzalloc include/linux/slab.h:738 [inline]
 uevent_show+0x15b/0x330 drivers/base/core.c:2403
 dev_attr_show+0x50/0xb0 drivers/base/core.c:2110
 sysfs_kf_seq_show+0x316/0x4c0 fs/sysfs/file.c:61
 seq_read_iter+0x49b/0xd50 fs/seq_file.c:230
 call_read_iter include/linux/fs.h:2167 [inline]
 new_sync_read fs/read_write.c:404 [inline]
 vfs_read+0x725/0xcf0 fs/read_write.c:485
 ksys_read+0x14d/0x250 fs/read_write.c:623
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f150b20d407
Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007ffc4554ae00 EFLAGS: 00000202 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007f150b11f880 RCX: 00007f150b20d407
RDX: 0000000000001000 RSI: 00005573cd9977c0 RDI: 0000000000000009
RBP: 00007f150b355ff0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 000000000000000a
R13: 00007f150b355ea0 R14: 0000000000000000 R15: 00005573cd80b7a0
 </TASK>
----------------
Code disassembly (best guess):
   0:	00 00                	add    %al,(%rax)
   2:	00 e8                	add    %ch,%al
   4:	a9 57 c5 fd f0       	test   $0xf0fdc557,%eax
   9:	45 29 37             	sub    %r14d,(%r15)
   c:	eb 4a                	jmp    0x58
   e:	65 4c 8b 3d 0b 91 0b 	mov    %gs:0x7c0b910b(%rip),%r15        # 0x7c0b9121
  15:	7c
  16:	49 81 c7 d4 15 00 00 	add    $0x15d4,%r15
  1d:	4d 89 fd             	mov    %r15,%r13
  20:	49 c1 ed 03          	shr    $0x3,%r13
  24:	43 0f b6 44 25 00    	movzbl 0x0(%r13,%r12,1),%eax
* 2a:	84 c0                	test   %al,%al <-- trapping instruction
  2c:	0f 85 6b 02 00 00    	jne    0x29d
  32:	41 8b 2f             	mov    (%r15),%ebp
  35:	85 ed                	test   %ebp,%ebp
  37:	0f 84 e4 fe ff ff    	je     0xffffff21
  3d:	ff cd                	dec    %ebp
  3f:	43                   	rex.XB