------------[ cut here ]------------
WARNING: CPU: 1 PID: 4306 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 1 PID: 4306 Comm: syz.3.12 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 5d 95 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 e0 91 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:ffffc90000dcfd28 EFLAGS: 00010246
RAX: ffffffff81a0b710 RBX: 0000000000000000 RCX: ffff88807b329dc0
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff8f0ed048 R09: ffffffff8f0ed058
R10: ffffffff8f0ed050 R11: ffffffff8f0ed043 R12: ffff88807b32b548
R13: ffffc9000133a000 R14: ffffc90000dcfd88 R15: 0000000000000000
FS: 000055557ceea500(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32d18ff8 CR3: 000000002356a000 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_f2594087b0f175cc+0x32/0x6b0
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_prog_run_pin_on_cpu include/linux/filter.h:652 [inline]
bpf_flow_dissect+0x33e/0x3f0 net/core/flow_dissector.c:896
__skb_flow_dissect+0x7c5/0x6260 net/core/flow_dissector.c:1029
skb_flow_dissect_flow_keys include/linux/skbuff.h:1390 [inline]
___skb_get_hash+0x55/0x680 net/core/flow_dissector.c:1638
__skb_get_hash+0xd2/0x270 net/core/flow_dissector.c:1703
skb_get_hash include/linux/skbuff.h:1432 [inline]
skb_tx_hash net/core/dev.c:3256 [inline]
netdev_pick_tx+0x335/0xad0 net/core/dev.c:4153
netdev_core_pick_tx+0x12e/0x2e0 net/core/dev.c:4186
__dev_queue_xmit+0x756/0x2f80 net/core/dev.c:4261
neigh_hh_output include/net/neighbour.h:493 [inline]
neigh_output include/net/neighbour.h:507 [inline]
ip6_finish_output2+0x1051/0x1510 net/ipv6/ip6_output.c:130
dst_output include/net/dst.h:452 [inline]
NF_HOOK include/linux/netfilter.h:302 [inline]
ndisc_send_skb+0xc2a/0x1500 net/ipv6/ndisc.c:513
addrconf_rs_timer+0x2d1/0x630 net/ipv6/addrconf.c:3956
call_timer_fn+0x17b/0x540 kernel/time/timer.c:1648
expire_timers kernel/time/timer.c:1699 [inline]
__run_timers+0x53e/0x800 kernel/time/timer.c:1970
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1983
handle_softirqs+0x339/0x830 kernel/softirq.c:576
__do_softirq kernel/softirq.c:610 [inline]
invoke_softirq kernel/softirq.c:450 [inline]
__irq_exit_rcu+0x13b/0x230 kernel/softirq.c:659
irq_exit_rcu+0x5/0x20 kernel/softirq.c:671
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:memset+0x7/0x40 mm/kasan/shadow.c:43
Code: 00 cc cc 89 f6 48 8b 0c 24 31 d2 e9 43 ef ff ff 0f 1f 00 89 f6 48 8b 0c 24 ba 01 00 00 00 e9 30 ef ff ff 55 41 56 53 48 89 d3 <89> f5 49 89 fe 48 8b 4c 24 18 48 89 d6 ba 01 00 00 00 e8 12 ef ff
RSP: 0018:ffffc900031af908 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000010 RCX: 1ffff92000635f01
RDX: 0000000000000010 RSI: 0000000000000000 RDI: ffffc900031afa38
RBP: ffffc900031afa30 R08: 0000000000000013 R09: 0000000000000006
R10: dffffc0000000000 R11: fffff52000635f49 R12: 1ffffffff1c1ecca
R13: dffffc0000000000 R14: ffffc900031afa38 R15: ffffc900031afa1d
unwind_next_frame+0xa3d/0x1d90 arch/x86/kernel/unwind_orc.c:547
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
fput_many+0xde/0x1a0 fs/file_table.c:367
filp_close+0x10e/0x150 fs/open.c:1371
__range_close fs/file.c:692 [inline]
__close_range+0x24f/0x510 fs/file.c:747
__do_sys_close_range fs/open.c:1410 [inline]
__se_sys_close_range fs/open.c:1407 [inline]
__x64_sys_close_range+0x76/0x80 fs/open.c:1407
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: 0033:0x7f09a210be59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffdcbe34988 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: ffffffffffffffda RBX: 00007ffdcbe34a70 RCX: 00007f09a210be59
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 0000000000011b5e R08: 0000000000000001 R09: 0000000000000000
R10: 0000001b31b20000 R11: 0000000000000246 R12: 00007ffdcbe34ab0
R13: 00007f09a2384fac R14: 0000000000011e08 R15: 00007f09a2384fa0
----------------
Code disassembly (best guess):
0: 00 cc add %cl,%ah
2: cc int3
3: 89 f6 mov %esi,%esi
5: 48 8b 0c 24 mov (%rsp),%rcx
9: 31 d2 xor %edx,%edx
b: e9 43 ef ff ff jmp 0xffffef53
10: 0f 1f 00 nopl (%rax)
13: 89 f6 mov %esi,%esi
15: 48 8b 0c 24 mov (%rsp),%rcx
19: ba 01 00 00 00 mov $0x1,%edx
1e: e9 30 ef ff ff jmp 0xffffef53
23: 55 push %rbp
24: 41 56 push %r14
26: 53 push %rbx
27: 48 89 d3 mov %rdx,%rbx
* 2a: 89 f5 mov %esi,%ebp <-- trapping instruction
2c: 49 89 fe mov %rdi,%r14
2f: 48 8b 4c 24 18 mov 0x18(%rsp),%rcx
34: 48 89 d6 mov %rdx,%rsi
37: ba 01 00 00 00 mov $0x1,%edx
3c: e8 .byte 0xe8
3d: 12 ef adc %bh,%ch
3f: ff .byte 0xff