------------[ cut here ]------------
WARNING: CPU: 0 PID: 7574 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 0 PID: 7574 Comm: syz.3.899 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Code: 24 45 31 f6 31 ff 89 de e8 3d 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 c0 f3 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:ffffc90000007d40 EFLAGS: 00010006
RAX: ffffffff819ed760 RBX: 0000000000000008 RCX: ffff88804fa60000
RDX: 0000000000010000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff88804fa60000 R09: 000000000000000c
R10: 000000000000000c R11: 0000000000010000 R12: ffff88804fa61788
R13: dffffc0000000000 R14: ffffc90000007da8 R15: 0000000000000000
FS: 00007f74469f46c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000002d000 CR3: 0000000044856000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
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_3b53280d0bd88656+0x5b/0xe78
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_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:skb_end_pointer include/linux/skbuff.h:1475 [inline]
RIP: 0010:skb_copy_datagram_from_iter+0x176/0x6a0 net/core/datagram.c:575
Code: c4 00 00 00 4c 89 f0 48 c1 e8 03 48 89 44 24 38 80 3c 28 00 74 08 4c 89 f7 e8 86 54 e9 f9 4c 89 3c 24 4c 89 74 24 40 4d 8b 36 <4c> 89 e0 48 c1 e8 03 48 89 44 24 30 0f b6 04 28 84 c0 0f 85 cc 04
RSP: 0018:ffffc90002f7f860 EFLAGS: 00000246
RAX: 1ffff110092c4b31 RBX: 0000000000000ec0 RCX: 0000000000080000
RDX: ffffc9000dea9000 RSI: 00000000000059cf RDI: 00000000000059d0
RBP: dffffc0000000000 R08: dffffc0000000000 R09: ffffed100f7ee1d8
R10: 0000000000000000 R11: 00000000000001d8 R12: ffff888049625984
R13: 0000000000008000 R14: ffff88807bf70000 R15: 0000000000000ec0
unix_stream_sendmsg+0x66b/0xc80 net/unix/af_unix.c:2094
sock_sendmsg_nosec net/socket.c:704 [inline]
__sock_sendmsg net/socket.c:716 [inline]
____sys_sendmsg+0x5a2/0x8c0 net/socket.c:2436
___sys_sendmsg+0x1f0/0x260 net/socket.c:2490
__sys_sendmsg net/socket.c:2519 [inline]
__do_sys_sendmsg net/socket.c:2528 [inline]
__se_sys_sendmsg+0x190/0x250 net/socket.c:2526
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: 0033:0x7f744878cba9
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:00007f74469f4038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f74489d3fa0 RCX: 00007f744878cba9
RDX: 0000000000000000 RSI: 0000200000000500 RDI: 0000000000000007
RBP: 00007f744880fe19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f74489d4038 R14: 00007f74489d3fa0 R15: 00007ffe7ec972b8
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 00 00 add %al,(%rax)
2: 00 4c 89 f0 add %cl,-0x10(%rcx,%rcx,4)
6: 48 c1 e8 03 shr $0x3,%rax
a: 48 89 44 24 38 mov %rax,0x38(%rsp)
f: 80 3c 28 00 cmpb $0x0,(%rax,%rbp,1)
13: 74 08 je 0x1d
15: 4c 89 f7 mov %r14,%rdi
18: e8 86 54 e9 f9 call 0xf9e954a3
1d: 4c 89 3c 24 mov %r15,(%rsp)
21: 4c 89 74 24 40 mov %r14,0x40(%rsp)
26: 4d 8b 36 mov (%r14),%r14
* 29: 4c 89 e0 mov %r12,%rax <-- trapping instruction
2c: 48 c1 e8 03 shr $0x3,%rax
30: 48 89 44 24 30 mov %rax,0x30(%rsp)
35: 0f b6 04 28 movzbl (%rax,%rbp,1),%eax
39: 84 c0 test %al,%al
3b: 0f .byte 0xf
3c: 85 cc test %ecx,%esp
3e: 04 .byte 0x4