------------[ cut here ]------------
WARNING: CPU: 0 PID: 5596 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 0 PID: 5596 Comm: dhcpcd-run-hook Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Code: 24 45 31 f6 31 ff 89 de e8 ad 89 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 30 86 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:ffffc90000006cc8 EFLAGS: 00010246
RAX: ffffffff81a08e70 RBX: 0000000000000000 RCX: ffff888076bd1dc0
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffc900000070f7 R09: ffffc900000070c4
R10: dffffc0000000000 R11: fffff52000000e1f R12: ffff888076bd3568
R13: ffffc900012f6030 R14: ffffc90000006d28 R15: 0000000000000000
FS: 00007f9ba1e5dc80(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005574a273d138 CR3: 00000000584d9000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 000000000000c0e0
DR3: 0000000000000000 DR6: 00000000ffff0ff0 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+0x32/0x380
bpf_dispatcher_nop_func include/linux/bpf.h:890 [inline]
__bpf_prog_run include/linux/filter.h:628 [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+0x12b/0x3e0 net/core/flow_dissector.c:896
__skb_flow_dissect+0x7cc/0x6180 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+0x141/0x300 net/core/dev.c:4186
__dev_queue_xmit+0x797/0x2e50 net/core/dev.c:4261
neigh_output include/net/neighbour.h:509 [inline]
ip6_finish_output2+0x1174/0x1640 net/ipv6/ip6_output.c:132
dst_output include/net/dst.h:452 [inline]
NF_HOOK include/linux/netfilter.h:302 [inline]
ndisc_send_skb+0xb7c/0x1410 net/ipv6/ndisc.c:513
addrconf_rs_timer+0x367/0x640 net/ipv6/addrconf.c:3966
call_timer_fn+0x17b/0x540 kernel/time/timer.c:1648
expire_timers kernel/time/timer.c:1699 [inline]
__run_timers+0x56c/0x810 kernel/time/timer.c:1970
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1983
handle_softirqs+0x336/0x830 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:preempt_count_add+0x5d/0x190 kernel/sched/core.c:5512
Code: 91 17 b0 7e 65 01 3d 8a 17 b0 7e 48 c7 c0 80 7f 2f 96 48 c1 e8 03 42 0f b6 04 38 84 c0 0f 85 e6 00 00 00 83 3d 23 27 dd 14 00 <75> 11 65 8b 05 62 17 b0 7e 0f b6 c0 3d f5 00 00 00 73 58 65 8b 05
RSP: 0018:ffffc9000338f448 EFLAGS: 00000246
RAX: 0000000000000004 RBX: 00007f9ba1ff7636 RCX: ffffffff962f7f03
RDX: ffffc9000338ff00 RSI: ffffffff8a7a48a0 RDI: 0000000000000001
RBP: 0000000000010d01 R08: ffffc9000338ff58 R09: 0000000000000009
R10: dffffc0000000000 R11: fffff52000671ea9 R12: ffff888076bd1dc0
R13: ffff888140007000 R14: 00007f9ba1ff7636 R15: dffffc0000000000
is_module_text_address+0x17/0x140 kernel/module.c:4779
kernel_text_address kernel/extable.c:145 [inline]
__kernel_text_address+0x84/0x100 kernel/extable.c:105
unwind_get_return_address+0x49/0x80 arch/x86/kernel/unwind_orc.c:323
arch_stack_walk+0xf2/0x140 arch/x86/kernel/stacktrace.c:26
stack_trace_save+0xa6/0xf0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track mm/kasan/common.c:46 [inline]
set_alloc_info mm/kasan/common.c:434 [inline]
__kasan_slab_alloc+0x92/0xc0 mm/kasan/common.c:467
kasan_slab_alloc include/linux/kasan.h:254 [inline]
slab_post_alloc_hook+0x4c/0x380 mm/slab.h:519
slab_alloc_node mm/slub.c:3225 [inline]
slab_alloc mm/slub.c:3233 [inline]
kmem_cache_alloc+0x15d/0x280 mm/slub.c:3238
anon_vma_alloc mm/rmap.c:90 [inline]
anon_vma_fork+0xea/0x520 mm/rmap.c:356
dup_mmap kernel/fork.c:575 [inline]
dup_mm kernel/fork.c:1472 [inline]
copy_mm+0x9df/0x13d0 kernel/fork.c:1524
copy_process+0x17a7/0x3e70 kernel/fork.c:2292
kernel_clone+0x23f/0x990 kernel/fork.c:2682
virtqueue callback for ffff888147169c00 (ffffffff8444ab50)
virtqueue interrupt with no work for ffff888147169b00
virtqueue interrupt with no work for ffff888147169a00
__do_sys_clone kernel/fork.c:2799 [inline]
__se_sys_clone kernel/fork.c:2783 [inline]
__x64_sys_clone+0x19a/0x210 kernel/fork.c:2783
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: 0033:0x7f9ba1ff7636
Code: 89 df e8 6d e8 f6 ff 45 31 c0 31 d2 31 f6 64 48 8b 04 25 10 00 00 00 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 52 89 c5 85 c0 75 31 64 48 8b 04 25 10 00 00
RSP: 002b:00007ffc30431900 EFLAGS: 00000246
ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffc30431908 RCX: 00007f9ba1ff7636
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00005574a273bc30 R08: 0000000000000000 R09: 0000000000000000
R10: 00007f9ba1e5df50 R11: 0000000000000246 R12: 00005574a2749448
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
----------------
Code disassembly (best guess), 2 bytes skipped:
0: b0 7e mov $0x7e,%al
2: 65 01 3d 8a 17 b0 7e add %edi,%gs:0x7eb0178a(%rip) # 0x7eb01793
9: 48 c7 c0 80 7f 2f 96 mov $0xffffffff962f7f80,%rax
10: 48 c1 e8 03 shr $0x3,%rax
14: 42 0f b6 04 38 movzbl (%rax,%r15,1),%eax
19: 84 c0 test %al,%al
1b: 0f 85 e6 00 00 00 jne 0x107
21: 83 3d 23 27 dd 14 00 cmpl $0x0,0x14dd2723(%rip) # 0x14dd274b
* 28: 75 11 jne 0x3b <-- trapping instruction
2a: 65 8b 05 62 17 b0 7e mov %gs:0x7eb01762(%rip),%eax # 0x7eb01793
31: 0f b6 c0 movzbl %al,%eax
34: 3d f5 00 00 00 cmp $0xf5,%eax
39: 73 58 jae 0x93
3b: 65 gs
3c: 8b .byte 0x8b
3d: 05 .byte 0x5