------------[ cut here ]------------
WARNING: CPU: 0 PID: 4325 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 0 PID: 4325 Comm: udevd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
RIP: 0010:copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Code: 24 45 31 f6 31 ff 89 de e8 7d 94 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 00 91 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:ffffc90000007e38 EFLAGS: 00010006
RAX: ffffffff81a08fd0 RBX: 0000000000000000 RCX: ffff888027b65940
RDX: 0000000000010000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff888027b65947 R09: 1ffff11004f6cb28
R10: dffffc0000000000 R11: ffffed1004f6cb29 R12: ffff888027b670c8
R13: 00007ffffffff000 R14: ffffc90000007ea8 R15: 0000000000000000
FS:  00007f8e3a809880(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2555a6 CR3: 000000001da5b000 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_compat kernel/trace/bpf_trace.c:281 [inline]
 bpf_probe_read_compat+0xdd/0x170 kernel/trace/bpf_trace.c:277
 bpf_prog_3d2613b5dfc7747f+0x32/0x178
 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_prog_test_run_raw_tp+0x1cd/0x3f0 net/bpf/test_run.c:335
 flush_smp_call_function_queue+0x2a9/0x760 kernel/smp.c:628
 __sysvec_call_function_single+0x98/0x240 arch/x86/kernel/smp.c:248
 instr_sysvec_call_function_single arch/x86/kernel/smp.c:243 [inline]
 sysvec_call_function_single+0x98/0xc0 arch/x86/kernel/smp.c:243
 </IRQ>
 <TASK>
 asm_sysvec_call_function_single+0x16/0x20 arch/x86/include/asm/idtentry.h:684
RIP: 0010:_compound_head include/linux/page-flags.h:-1 [inline]
RIP: 0010:PageActive include/linux/page-flags.h:352 [inline]
RIP: 0010:__PageSlabPfmemalloc include/linux/page-flags.h:812 [inline]
RIP: 0010:pfmemalloc_match_unsafe mm/slub.c:2829 [inline]
RIP: 0010:___slab_alloc+0x1ce/0xdd0 mm/slub.c:2931
Code: 00 02 00 00 0f 85 48 08 00 00 45 89 ef 41 f7 c4 00 02 00 00 49 89 e8 0f 84 b1 fe ff ff fb 45 89 ef e9 a8 fe ff ff 48 8b 45 08 <48> 89 e9 a8 01 0f 85 28 02 00 00 48 83 39 ff 48 8b 45 08 0f 84 b3
RSP: 0018:ffffc900048efc68 EFLAGS: 00000246
RAX: ffffea0000a937c0 RBX: ffff888016c41280 RCX: 0000000000000000
RDX: 00000000ffffffff RSI: 0000000000000cc0 RDI: ffff888016c41280
RBP: ffffea0000920d40 R08: ffff8880b903dc70 R09: 1ffffffff1b13b65
R10: dffffc0000000000 R11: fffffbfff1b13b66 R12: 0000000000000000
R13: 00000000ffffffff R14: ffffffff7fff0000 R15: 00000000ffffffff
 __slab_alloc mm/slub.c:3100 [inline]
 slab_alloc_node mm/slub.c:3191 [inline]
 slab_alloc mm/slub.c:3233 [inline]
 __kmalloc_track_caller+0x1cb/0x330 mm/slub.c:4930
 kmemdup+0x22/0x50 mm/util.c:128
 shmem_symlink+0x155/0x6c0 mm/shmem.c:3096
 vfs_symlink+0x247/0x3d0 fs/namei.c:4437
 do_symlinkat+0x1ab/0x6b0 fs/namei.c:4466
 __do_sys_symlink fs/namei.c:4488 [inline]
 __se_sys_symlink fs/namei.c:4486 [inline]
 __x64_sys_symlink+0x7a/0x90 fs/namei.c:4486
 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: 0033:0x7f8e3a965527
Code: f0 ff ff 77 06 c3 0f 1f 44 00 00 48 8b 15 c9 b8 0d 00 f7 d8 64 89 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 b8 58 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 8b 15 a1 b8 0d 00 f7 d8 64 89 02 b8
RSP: 002b:00007ffd68a5bc18 EFLAGS: 00000202 ORIG_RAX: 0000000000000058
RAX: ffffffffffffffda RBX: 000056200bd15830 RCX: 00007f8e3a965527
RDX: fffffffffffffe68 RSI: 00007ffd68a5bc20 RDI: 000056200bd1f420
RBP: 000000000000008f R08: 0000000000000064 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffd68a5bc20
R13: 000056200bd18410 R14: 0000000000000008 R15: 000056200bd15830
 </TASK>
----------------
Code disassembly (best guess):
   0:	00 02                	add    %al,(%rdx)
   2:	00 00                	add    %al,(%rax)
   4:	0f 85 48 08 00 00    	jne    0x852
   a:	45 89 ef             	mov    %r13d,%r15d
   d:	41 f7 c4 00 02 00 00 	test   $0x200,%r12d
  14:	49 89 e8             	mov    %rbp,%r8
  17:	0f 84 b1 fe ff ff    	je     0xfffffece
  1d:	fb                   	sti
  1e:	45 89 ef             	mov    %r13d,%r15d
  21:	e9 a8 fe ff ff       	jmp    0xfffffece
  26:	48 8b 45 08          	mov    0x8(%rbp),%rax
* 2a:	48 89 e9             	mov    %rbp,%rcx <-- trapping instruction
  2d:	a8 01                	test   $0x1,%al
  2f:	0f 85 28 02 00 00    	jne    0x25d
  35:	48 83 39 ff          	cmpq   $0xffffffffffffffff,(%rcx)
  39:	48 8b 45 08          	mov    0x8(%rbp),%rax
  3d:	0f                   	.byte 0xf
  3e:	84                   	.byte 0x84
  3f:	b3                   	.byte 0xb3