------------[ cut here ]------------
WARNING: CPU: 1 PID: 6409 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 1 PID: 6409 Comm: syz.5.556 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:ffffc90000dd0d30 EFLAGS: 00010006
RAX: ffffffff819ed980 RBX: 0000000000000008 RCX: ffff8880193c5940
RDX: 0000000000010000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: ffffed1003278b29
R10: ffffed1003278b29 R11: 1ffff11003278b28 R12: ffff8880193c70c8
R13: 00007ffffffff000 R14: ffffc90000dd0da8 R15: 0000000020000000
FS: 0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000000 CR3: 0000000084d59000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
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_2c2e2930f3e7254b+0x5e/0x990
bpf_dispatcher_nop_func include/linux/bpf.h:888 [inline]
__bpf_prog_run include/linux/filter.h:621 [inline]
bpf_prog_run include/linux/filter.h:635 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:1878 [inline]
bpf_trace_run2+0x242/0x2d0 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:internal_get_user_pages_fast+0x1f0/0x2080 mm/gup.c:2895
Code: df 41 80 3c 06 00 74 08 48 89 df e8 ca 61 11 00 bf 28 01 00 00 48 03 3b 31 f6 31 d2 b9 01 00 00 00 41 b8 01 00 00 00 45 31 c9 <68> bf d2 aa 81 e8 e6 26 b1 ff 48 83 c4 08 e8 fd f8 cc ff 48 b8 00
RSP: 0018:ffffc9000312f300 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: ffff8880193c5e50 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88807e1e2b28
RBP: ffffc9000312f4f0 R08: 0000000000000001 R09: 0000000000000000
R10: fffff52000625ecc R11: 1ffff92000625ec9 R12: dffffc0000000000
R13: 00007f6a745c0000 R14: 1ffff11003278bca R15: 0000000000000001
get_futex_key+0x203/0x1300 kernel/futex/core.c:593
futex_wake+0xf9/0x530 kernel/futex/core.c:1672
do_futex+0xcde/0x1240 kernel/futex/core.c:3987
mm_release+0x262/0x3b0 kernel/fork.c:1415
exit_mm+0xae/0x6c0 kernel/exit.c:488
do_exit+0x5a1/0x20a0 kernel/exit.c:870
do_group_exit+0x12e/0x300 kernel/exit.c:997
get_signal+0x6ca/0x12c0 kernel/signal.c:2900
arch_do_signal_or_restart+0xc1/0x1300 arch/x86/kernel/signal.c:867
handle_signal_work kernel/entry/common.c:154 [inline]
exit_to_user_mode_loop+0x9e/0x130 kernel/entry/common.c:178
exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:214
__syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307
do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f6a76359749
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f6a745c00e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f6a765affa8 RCX: 00007f6a76359749
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f6a765affa8
RBP: 00007f6a765affa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6a765b0038 R14: 00007ffd90a6a9c0 R15: 00007ffd90a6aaa8
----------------
Code disassembly (best guess):
0: df 41 80 filds -0x80(%rcx)
3: 3c 06 cmp $0x6,%al
5: 00 74 08 48 add %dh,0x48(%rax,%rcx,1)
9: 89 df mov %ebx,%edi
b: e8 ca 61 11 00 call 0x1161da
10: bf 28 01 00 00 mov $0x128,%edi
15: 48 03 3b add (%rbx),%rdi
18: 31 f6 xor %esi,%esi
1a: 31 d2 xor %edx,%edx
1c: b9 01 00 00 00 mov $0x1,%ecx
21: 41 b8 01 00 00 00 mov $0x1,%r8d
27: 45 31 c9 xor %r9d,%r9d
* 2a: 68 bf d2 aa 81 push $0xffffffff81aad2bf <-- trapping instruction
2f: e8 e6 26 b1 ff call 0xffb1271a
34: 48 83 c4 08 add $0x8,%rsp
38: e8 fd f8 cc ff call 0xffccf93a
3d: 48 rex.W
3e: b8 .byte 0xb8