------------[ cut here ]------------
WARNING: CPU: 1 PID: 4273 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 1 PID: 4273 Comm: syz.0.1 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Code: 24 45 31 f6 31 ff 89 de e8 7d 90 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 00 8d 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: 0000:ffffc90000dcfd28 EFLAGS: 00010246
RAX: ffffffff81a0a790 RBX: 0000000000000000 RCX: ffff8880220b8000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffc90000dd0157 R09: ffffc90000dd0124
R10: dffffc0000000000 R11: fffff520001ba02b R12: ffff8880220b9788
R13: ffffc900011fc030 R14: ffffc90000dcfd88 R15: 0000000000000000
FS: 0000555591e86500(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32523ffc CR3: 000000005ea5f000 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+0x32/0x39c
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_prog_run_pin_on_cpu include/linux/filter.h:652 [inline]
bpf_flow_dissect+0x12b/0x3f0 net/core/flow_dissector.c:896
__skb_flow_dissect+0x792/0x60b0 net/core/flow_dissector.c:1024
skb_flow_dissect_flow_keys include/linux/skbuff.h:1390 [inline]
___skb_get_hash+0x55/0x680 net/core/flow_dissector.c:1583
__skb_get_hash+0xd2/0x270 net/core/flow_dissector.c:1648
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_output include/net/neighbour.h:509 [inline]
ip6_finish_output2+0x108c/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:seqcount_lockdep_reader_access+0x144/0x190 include/linux/seqlock.h:106
Code: 00 00 00 00 9c 8f 44 24 20 f7 44 24 20 00 02 00 00 41 c6 04 07 f8 75 42 41 f7 c5 00 02 00 00 74 01 fb 48 c7 04 24 0e 36 e0 45 <4b> c7 04 27 00 00 00 00 43 c7 44 27 08 00 00 00 00 65 48 8b 04 25
RSP: 0000:ffffc900030ef380 EFLAGS: 00000206
RAX: dffffc0000000004 RBX: ffff88813fffb7c0 RCX: 5261038dbc07da00
RDX: dffffc0000000000 RSI: ffffffff8a2b2800 RDI: ffffffff8a79fe40
RBP: ffffc900030ef440 R08: ffffffff901d516f R09: 1ffffffff203aa2d
R10: dffffc0000000000 R11: fffffbfff203aa2e R12: dffffc0000000000
R13: 0000000000000a02 R14: ffffffff81b550b7 R15: 1ffff9200061de70
read_seqbegin include/linux/seqlock.h:897 [inline]
zone_span_seqbegin include/linux/memory_hotplug.h:83 [inline]
page_outside_zone_boundaries mm/page_alloc.c:580 [inline]
bad_range+0x77/0x2d0 mm/page_alloc.c:607
rmqueue mm/page_alloc.c:3760 [inline]
get_page_from_freelist+0x1b9c/0x1ca0 mm/page_alloc.c:4189
__alloc_pages+0x1ee/0x480 mm/page_alloc.c:5501
__page_cache_alloc+0xce/0x440 mm/filemap.c:1022
page_cache_ra_unbounded+0x25d/0x940 mm/readahead.c:216
do_sync_mmap_readahead+0x5c9/0x730 mm/filemap.c:2996
filemap_fault+0x70f/0x1370 mm/filemap.c:3089
__do_fault+0x141/0x330 mm/memory.c:3928
do_shared_fault mm/memory.c:4318 [inline]
do_fault mm/memory.c:4396 [inline]
handle_pte_fault mm/memory.c:4650 [inline]
__handle_mm_fault mm/memory.c:4785 [inline]
handle_mm_fault+0x1d19/0x4410 mm/memory.c:4883
do_user_addr_fault+0x489/0xc80 arch/x86/mm/fault.c:1355
handle_page_fault arch/x86/mm/fault.c:1443 [inline]
exc_page_fault+0x60/0x100 arch/x86/mm/fault.c:1496
asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:606
RIP: 0033:0x7fbc6e5bd560
Code: 89 dc 41 83 e4 03 0f 85 ca 01 00 00 4c 89 ff be 04 00 00 00 e8 81 93 fe ff 49 8b 47 40 41 83 47 30 04 48 8d 50 fc 49 89 57 40 <89> 68 fc 41 8b 47 30 48 83 c4 28 5b 5d 41 5c 41 5d 41 5e 41 5f c3
RSP: 002b:00007ffe6d0c20c0 EFLAGS: 00010202
RAX: 0000001b32524000 RBX: 0000000000000000 RCX: 00000000005ffde8
RDX: 0000001b32523ffc RSI: 00000000005ffde8 RDI: 00007fbc6f491700
RBP: 0000000000000000 R08: 0000000000000000 R09: 00007fbc6e94e000
R10: 00007fbc6f491700 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000186 R14: ffffffff819d7dd4 R15: 00007fbc6f491720
----------------
Code disassembly (best guess):
0: 00 00 add %al,(%rax)
2: 00 00 add %al,(%rax)
4: 9c pushf
5: 8f 44 24 20 pop 0x20(%rsp)
9: f7 44 24 20 00 02 00 testl $0x200,0x20(%rsp)
10: 00
11: 41 c6 04 07 f8 movb $0xf8,(%r15,%rax,1)
16: 75 42 jne 0x5a
18: 41 f7 c5 00 02 00 00 test $0x200,%r13d
1f: 74 01 je 0x22
21: fb sti
22: 48 c7 04 24 0e 36 e0 movq $0x45e0360e,(%rsp)
29: 45
* 2a: 4b c7 04 27 00 00 00 movq $0x0,(%r15,%r12,1) <-- trapping instruction
31: 00
32: 43 c7 44 27 08 00 00 movl $0x0,0x8(%r15,%r12,1)
39: 00 00
3b: 65 gs
3c: 48 rex.W
3d: 8b .byte 0x8b
3e: 04 25 add $0x25,%al