------------[ cut here ]------------
WARNING: CPU: 0 PID: 4451 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 0 PID: 4451 Comm: syz.4.52 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Code: 24 45 31 f6 31 ff 89 de e8 dd 99 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 60 96 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:ffffc90000007e30 EFLAGS: 00010006
RAX: ffffffff81a05c40 RBX: 0000000000000000 RCX: ffff88801dc71dc0
RDX: 0000000000010000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff88801dc71dc7 R09: 1ffff11003b8e3b8
R10: dffffc0000000000 R11: ffffed1003b8e3b9 R12: ffff88801dc73548
R13: 00007ffffffff000 R14: ffffc90000007ea8 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055555b2ada38 CR3: 000000006395a000 CR4: 00000000003506f0
DR0: 0000000000000008 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
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_03eebc38237b138e+0x34/0x9dc
 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:preempt_latency_start kernel/sched/core.c:5492 [inline]
RIP: 0010:preempt_count_add+0xb5/0x190 kernel/sched/core.c:5515
Code: 0b 00 85 c0 74 09 31 db 31 ff e8 56 bf 0b 00 65 4c 8b 35 fe 27 b0 7e 49 81 c6 e8 14 00 00 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 <74> 08 4c 89 f7 e8 71 cb 6b 00 49 89 1e 5b 41 5e 41 5f c3 89 fb e8
RSP: 0018:ffffc9000321f730 EFLAGS: 00000246
RAX: 1ffff11003b8e655 RBX: ffffffff81350ed7 RCX: ffffffff962d1f00
RDX: dffffc0000000000 RSI: ffffffff81488cd0 RDI: ffffffff81350ed7
RBP: 1ffff92000643f04 R08: ffffc9000321f8b0 R09: 0000000000000007
R10: dffffc0000000000 R11: fffff52000643f09 R12: ffffffff81488cd0
R13: ffffc9000321fdc0 R14: ffff88801dc732a8 R15: dffffc0000000000
 unwind_next_frame+0x97/0x1cf0 arch/x86/kernel/unwind_orc.c:433
 arch_stack_walk+0x10c/0x140 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0xa6/0xf0 kernel/stacktrace.c:122
 kasan_save_stack+0x35/0x60 mm/kasan/common.c:38
 kasan_record_aux_stack+0xb8/0x100 mm/kasan/generic.c:348
 task_work_add+0x2f/0x1d0 kernel/task_work.c:38
 mntput_no_expire+0x4e9/0x770 fs/namespace.c:1227
 mntput fs/namespace.c:1244 [inline]
 namespace_unlock+0x3a6/0x440 fs/namespace.c:1463
 drop_collected_mounts fs/namespace.c:1948 [inline]
 put_mnt_ns+0xdb/0x120 fs/namespace.c:4426
 free_nsproxy+0x49/0x3c0 kernel/nsproxy.c:191
 do_exit+0x630/0x2110 kernel/exit.c:883
 __do_sys_exit kernel/exit.c:967 [inline]
 __se_sys_exit kernel/exit.c:965 [inline]
 __x64_sys_exit+0x3c/0x40 kernel/exit.c:965
 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: 0033:0x7f9dce56be59
Code: Unable to access opcode bytes at RIP 0x7f9dce56be2f.
RSP: 002b:00007f9dcc7c3fd8 EFLAGS: 00000246 ORIG_RAX: 000000000000003c
RAX: ffffffffffffffda RBX: 00007f9dce7f3fa0 RCX: 00007f9dce56be59
RDX: 00007f9dcc7c49c8 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f9dce601e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9dce7f4038 R14: 00007f9dce7f3fa0 R15: 00007ffe92179238
 </TASK>
----------------
Code disassembly (best guess):
   0:	0b 00                	or     (%rax),%eax
   2:	85 c0                	test   %eax,%eax
   4:	74 09                	je     0xf
   6:	31 db                	xor    %ebx,%ebx
   8:	31 ff                	xor    %edi,%edi
   a:	e8 56 bf 0b 00       	call   0xbbf65
   f:	65 4c 8b 35 fe 27 b0 	mov    %gs:0x7eb027fe(%rip),%r14        # 0x7eb02815
  16:	7e
  17:	49 81 c6 e8 14 00 00 	add    $0x14e8,%r14
  1e:	4c 89 f0             	mov    %r14,%rax
  21:	48 c1 e8 03          	shr    $0x3,%rax
  25:	42 80 3c 38 00       	cmpb   $0x0,(%rax,%r15,1)
* 2a:	74 08                	je     0x34 <-- trapping instruction
  2c:	4c 89 f7             	mov    %r14,%rdi
  2f:	e8 71 cb 6b 00       	call   0x6bcba5
  34:	49 89 1e             	mov    %rbx,(%r14)
  37:	5b                   	pop    %rbx
  38:	41 5e                	pop    %r14
  3a:	41 5f                	pop    %r15
  3c:	c3                   	ret
  3d:	89 fb                	mov    %edi,%ebx
  3f:	e8                   	.byte 0xe8