------------[ cut here ]------------
WARNING: CPU: 1 PID: 5135 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 1 PID: 5135 Comm: syz.2.231 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:ffffc90000dd0d30 EFLAGS: 00010006
RAX: ffffffff819ed760 RBX: 0000000000000000 RCX: ffff888020273b80
RDX: 0000000000010000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: ffffed100404e771
R10: ffffed100404e771 R11: 1ffff1100404e770 R12: ffff888020275308
R13: 00007ffffffff000 R14: ffffc90000dd0da8 R15: 0000000000000000
FS: 00007f39efbb56c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f39efbb4f98 CR3: 000000005df6d000 CR4: 00000000003506e0
DR0: 0000200000000300 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_f3c4d654356a1293+0x34/0x50c
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:list_empty include/linux/list.h:290 [inline]
RIP: 0010:plist_node_empty include/linux/plist.h:221 [inline]
RIP: 0010:futex_wait_queue_me+0x1de/0x440 kernel/futex/core.c:2856
Code: 89 d8 48 c1 e8 03 42 80 3c 38 00 4c 8b 34 24 74 08 48 89 df e8 93 13 50 00 48 83 3b 00 0f 84 03 01 00 00 e8 74 ab 0b 00 eb 2c <43> 80 3c 2f 00 4d 89 ef 74 08 4c 89 f7 e8 70 13 50 00 49 8b 06 4c
RSP: 0018:ffffc9000342fa80 EFLAGS: 00000246
RAX: 0000000080000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 00000000ffffffff
RBP: ffffc90000e0c288 R08: dffffc0000000000 R09: fffff520001c1852
R10: fffff520001c1852 R11: 1ffff920001c1851 R12: ffff888020273b80
R13: dffffc0000000000 R14: ffffc9000342fbc8 R15: 1ffff92000685f79
futex_wait+0x202/0x5c0 kernel/futex/core.c:2964
do_futex+0xd1c/0x1240 kernel/futex/core.c:3982
__do_sys_futex kernel/futex/core.c:4059 [inline]
__se_sys_futex+0x3a3/0x430 kernel/futex/core.c:4040
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: 0033:0x7f39f194dc29
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:00007f39efbb50e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f39f1b94fa8 RCX: 00007f39f194dc29
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f39f1b94fa8
RBP: 00007f39f1b94fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f39f1b95038 R14: 00007ffdddff8ba0 R15: 00007ffdddff8c88
----------------
Code disassembly (best guess):
0: 89 d8 mov %ebx,%eax
2: 48 c1 e8 03 shr $0x3,%rax
6: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1)
b: 4c 8b 34 24 mov (%rsp),%r14
f: 74 08 je 0x19
11: 48 89 df mov %rbx,%rdi
14: e8 93 13 50 00 call 0x5013ac
19: 48 83 3b 00 cmpq $0x0,(%rbx)
1d: 0f 84 03 01 00 00 je 0x126
23: e8 74 ab 0b 00 call 0xbab9c
28: eb 2c jmp 0x56
* 2a: 43 80 3c 2f 00 cmpb $0x0,(%r15,%r13,1) <-- trapping instruction
2f: 4d 89 ef mov %r13,%r15
32: 74 08 je 0x3c
34: 4c 89 f7 mov %r14,%rdi
37: e8 70 13 50 00 call 0x5013ac
3c: 49 8b 06 mov (%r14),%rax
3f: 4c rex.WR