------------[ cut here ]------------
WARNING: CPU: 1 PID: 4182 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 1 PID: 4182 Comm: syz-execprog 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:ffffc90000dd0d40 EFLAGS: 00010006
RAX: ffffffff819ecfb0 RBX: 0000000000000000 RCX: ffff888074330000
RDX: 0000000000010000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffffbfff1ff6e19
R10: fffffbfff1ff6e19 R11: 1ffffffff1ff6e18 R12: ffff888074331788
R13: dffffc0000000000 R14: ffffc90000dd0da8 R15: 0000000000000000
FS: 000000c00007c098(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31363fff CR3: 00000000764a5000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
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_8848bede53a6b60e+0x34/0x530
bpf_dispatcher_nop_func include/linux/bpf.h:790 [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
trace_tlb_flush+0xe6/0x110 include/trace/events/tlb.h:38
flush_tlb_func+0x43f/0x510 arch/x86/mm/tlb.c:855
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
asm_sysvec_call_function_single+0x16/0x20 arch/x86/include/asm/idtentry.h:684
RIP: 0010:arch_static_branch arch/x86/include/asm/jump_label.h:27 [inline]
RIP: 0010:context_tracking_enabled include/linux/context_tracking_state.h:31 [inline]
RIP: 0010:syscall_exit_to_user_mode_prepare+0x14/0x80 kernel/entry/common.c:274
Code: 9c 7e 75 94 e8 e5 50 9a ff eb 8d 0f 0b eb c4 0f 1f 80 00 00 00 00 41 56 53 50 65 48 8b 05 f4 45 9c 7e 48 8b 58 08 48 63 77 78 4b 48 c7 04 24 00 00 00 00 9c 8f 04 24 f7 04 24 00 02 00 00 74
RSP: 0018:ffffc900026bfef0 EFLAGS: 00000246
RAX: ffff888074330000 RBX: 0000000000000000 RCX: e2d6ae9157114000
RDX: dffffc0000000000 RSI: 0000000000000023 RDI: ffffc900026bff58
RBP: ffffc900026bff48 R08: dffffc0000000000 R09: ffffc900026bfbe0
R10: fffff520004d7f8c R11: 1ffff920004d7f7c R12: 0000000000000000
R13: 0000000000000000 R14: ffffc900026bff58 R15: 0000000000000023
__syscall_exit_to_user_mode_work kernel/entry/common.c:294 [inline]
syscall_exit_to_user_mode+0x9/0x40 kernel/entry/common.c:307
do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x47fad7
Code: 8b 44 24 20 b9 40 42 0f 00 f7 f1 48 89 04 24 b8 e8 03 00 00 f7 e2 48 89 44 24 08 48 89 e7 be 00 00 00 00 b8 23 00 00 00 0f 05 <48> 83 c4 10 5d c3 cc cc cc b8 ba 00 00 00 0f 05 89 44 24 08 c3 cc
RSP: 002b:000000c00005df18 EFLAGS: 00000202 ORIG_RAX: 0000000000000023
RAX: 0000000000000000 RBX: 0000000000000014 RCX: 000000000047fad7
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000c00005df18
RBP: 000000c00005df28 R08: 000000000000083c R09: 0034a9239eaf0a4c
R10: 00000022871bfe94 R11: 0000000000000202 R12: 000000c00005df18
R13: 000000c00007c008 R14: 000000c000002700 R15: 000000c000002700
----------------
Code disassembly (best guess):
0: 9c pushf
1: 7e 75 jle 0x78
3: 94 xchg %eax,%esp
4: e8 e5 50 9a ff call 0xff9a50ee
9: eb 8d jmp 0xffffff98
b: 0f 0b ud2
d: eb c4 jmp 0xffffffd3
f: 0f 1f 80 00 00 00 00 nopl 0x0(%rax)
16: 41 56 push %r14
18: 53 push %rbx
19: 50 push %rax
1a: 65 48 8b 05 f4 45 9c mov %gs:0x7e9c45f4(%rip),%rax # 0x7e9c4616
21: 7e
22: 48 8b 58 08 mov 0x8(%rax),%rbx
26: 48 63 77 78 movslq 0x78(%rdi),%rsi
* 2a: eb 4b jmp 0x77 <-- trapping instruction
2c: 48 c7 04 24 00 00 00 movq $0x0,(%rsp)
33: 00
34: 9c pushf
35: 8f 04 24 pop (%rsp)
38: f7 04 24 00 02 00 00 testl $0x200,(%rsp)
3f: 74 .byte 0x74