------------[ cut here ]------------
WARNING: CPU: 1 PID: 4181 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 1 PID: 4181 Comm: syz-executor Not tainted 5.15.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Code: 24 45 31 f6 31 ff 89 de e8 ed f7 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 70 f4 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:ffffc90000dd09b8 EFLAGS: 00010246
RAX: ffffffff819ecfb0 RBX: 0000000000000004 RCX: ffff888065510000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: ffffed100caa2001
R10: ffffed100caa2001 R11: 1ffff1100caa2000 R12: ffff888065511788
R13: 00007ffffffff000 R14: ffffc90000dd0a28 R15: 0000000000000000
FS:  000055557b638500(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000000638d8000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 bpf_prog_3388ad4a0d630836+0x35/0xb64
 __bpf_trace_kmem_cache_free+0x99/0xc0 include/trace/events/kmem.h:138
 __traceiter_kmem_cache_free+0x30/0x50 include/trace/events/kmem.h:138
 trace_kmem_cache_free include/trace/events/kmem.h:138 [inline]
 kmem_cache_free+0x1e7/0x210 mm/slub.c:3516
 __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:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:202
Code: 66 2e 0f 1f 84 00 00 00 00 00 53 48 89 fb e8 17 00 00 00 48 8b 3d c0 ac f1 0b 48 89 de 5b e9 77 99 43 00 00 00 cc cc 00 00 cc <48> 8b 04 24 65 48 8b 0d 94 ab 8a 7e 65 8b 15 95 ab 8a 7e 81 e2 00
RSP: 0018:ffffc90002f1f7b8 EFLAGS: 00000287
R10: ffffed100e7d18fa R11: 1ffff1100e7d18f9 R12: dffffc0000000000
R13: 1ffff920005e3f63 R14: ffff888073e8c758 R15: 0000000000200000
 step_into+0x2d4/0xd00 fs/namei.c:1810
 link_path_walk+0x662/0xd40 fs/namei.c:-1
 path_lookupat+0x9d/0x440 fs/namei.c:2454
 filename_lookup+0x1e2/0x4f0 fs/namei.c:2484
 user_path_at_empty+0x40/0x190 fs/namei.c:2883
 user_path_at include/linux/namei.h:57 [inline]
 vfs_statx+0x102/0x4d0 fs/stat.c:221
 vfs_fstatat fs/stat.c:243 [inline]
 __do_sys_newfstatat fs/stat.c:411 [inline]
 __se_sys_newfstatat fs/stat.c:405 [inline]
 __x64_sys_newfstatat+0x12c/0x1b0 fs/stat.c:405
 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: 0033:0x7feb958233fa
Code: 48 89 f2 b9 00 01 00 00 48 89 fe bf 9c ff ff ff e9 0b 00 00 00 66 2e 0f 1f 84 00 00 00 00 00 90 41 89 ca b8 06 01 00 00 0f 05 <3d> 00 f0 ff ff 77 07 31 c0 c3 0f 1f 40 00 48 c7 c2 a8 ff ff ff f7
RSP: 002b:00007fff26437988 EFLAGS: 00000286 ORIG_RAX: 0000000000000106
RAX: ffffffffffffffda RBX: 00007feb958a7c05 RCX: 00007feb958233fa
RDX: 00007fff264379b0 RSI: 00007fff26437a40 RDI: 00000000ffffff9c
RBP: 00007fff26437a40 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000286 R12: 00007fff26438ad0
R13: 00007feb958a7c05 R14: 000000000003a33d R15: 00007fff26438b10
 </TASK>
----------------
Code disassembly (best guess):
   0:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
   7:	00 00 00
   a:	53                   	push   %rbx
   b:	48 89 fb             	mov    %rdi,%rbx
   e:	e8 17 00 00 00       	call   0x2a
  13:	48 8b 3d c0 ac f1 0b 	mov    0xbf1acc0(%rip),%rdi        # 0xbf1acda
  1a:	48 89 de             	mov    %rbx,%rsi
  1d:	5b                   	pop    %rbx
  1e:	e9 77 99 43 00       	jmp    0x43999a
  23:	00 00                	add    %al,(%rax)
  25:	cc                   	int3
  26:	cc                   	int3
  27:	00 00                	add    %al,(%rax)
  29:	cc                   	int3
* 2a:	48 8b 04 24          	mov    (%rsp),%rax <-- trapping instruction
  2e:	65 48 8b 0d 94 ab 8a 	mov    %gs:0x7e8aab94(%rip),%rcx        # 0x7e8aabca
  35:	7e
  36:	65 8b 15 95 ab 8a 7e 	mov    %gs:0x7e8aab95(%rip),%edx        # 0x7e8aabd2
  3d:	81                   	.byte 0x81
  3e:	e2 00                	loop   0x40