------------[ cut here ]------------
WARNING: CPU: 0 PID: 4453 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 0 PID: 4453 Comm: syz.3.46 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 6d 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 f0 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:ffffc900000070c8 EFLAGS: 00010246
RAX: ffffffff819ed660 RBX: 0000000000000000 RCX: ffff88807d8d5940
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffffbfff1ff7a19
R10: fffffbfff1ff7a19 R11: 1ffffffff1ff7a18 R12: ffff88807d8d70c8
R13: dffffc0000000000 R14: ffffc90000007128 R15: 0000000000000000
FS: 00007f07ea0b66c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f57d1faff98 CR3: 0000000060e48000 CR4: 00000000003506f0
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_f71667c8aa58b018+0x3a/0x548
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
__bpf_trace_kfree+0x6e/0x90 include/trace/events/kmem.h:118
trace_kfree include/trace/events/kmem.h:118 [inline]
kfree+0x25f/0x2a0 mm/slub.c:4554
skb_free_head net/core/skbuff.c:655 [inline]
skb_release_data+0x6fe/0x850 net/core/skbuff.c:677
skb_release_all net/core/skbuff.c:742 [inline]
__kfree_skb net/core/skbuff.c:756 [inline]
kfree_skb_reason+0xaf/0x110 net/core/skbuff.c:776
kfree_skb include/linux/skbuff.h:1118 [inline]
macsec_start_xmit+0x3a1/0x2ca0 drivers/net/macsec.c:3451
__netdev_start_xmit include/linux/netdevice.h:5027 [inline]
netdev_start_xmit include/linux/netdevice.h:5041 [inline]
xmit_one net/core/dev.c:3649 [inline]
dev_hard_start_xmit+0x2a5/0x7e0 net/core/dev.c:3665
__dev_queue_xmit+0x19df/0x2ed0 net/core/dev.c:4288
neigh_hh_output include/net/neighbour.h:493 [inline]
neigh_output include/net/neighbour.h:507 [inline]
ip6_finish_output2+0x1035/0x1500 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+0xbea/0x14a0 net/ipv6/ndisc.c:513
addrconf_rs_timer+0x2b8/0x600 net/ipv6/addrconf.c:3956
call_timer_fn+0x16c/0x530 kernel/time/timer.c:1451
expire_timers kernel/time/timer.c:1496 [inline]
__run_timers+0x525/0x7c0 kernel/time/timer.c:1767
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1780
handle_softirqs+0x328/0x820 kernel/softirq.c:576
__do_softirq kernel/softirq.c:610 [inline]
invoke_softirq kernel/softirq.c:450 [inline]
__irq_exit_rcu+0x12f/0x220 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+0x17b/0x1c0 include/linux/seqlock.h:106
Code: 00 4d 85 e4 75 16 e8 54 cc 0f 00 eb 15 e8 4d cc 0f 00 e8 88 30 41 08 4d 85 e4 74 ea e8 3e cc 0f 00 fb 48 c7 04 24 0e 36 e0 45 <4b> c7 04 3e 00 00 00 00 66 43 c7 44 3e 09 00 00 43 c6 44 3e 0b 00
RSP: 0018:ffffc9000312f320 EFLAGS: 00000246
RAX: ffffffff8167fe12 RBX: 0000000000000000 RCX: 0000000000080000
RDX: ffffc9000dc69000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: ffffc9000312f3c8 R08: dffffc0000000000 R09: fffffbfff1ff7a32
R10: fffffbfff1ff7a32 R11: 1ffffffff1ff7a31 R12: 0000000000000200
R13: ffff88807be99800 R14: 1ffff92000625e64 R15: dffffc0000000000
timekeeping_get_delta kernel/time/timekeeping.c:254 [inline]
timekeeping_get_ns kernel/time/timekeeping.c:388 [inline]
ktime_get+0x7b/0x270 kernel/time/timekeeping.c:831
ktime_get_ns include/linux/timekeeping.h:154 [inline]
tcp_clock_ns include/net/tcp.h:775 [inline]
tcp_mstamp_refresh net/ipv4/tcp_output.c:55 [inline]
tcp_write_xmit+0x40/0x6590 net/ipv4/tcp_output.c:2629
__tcp_push_pending_frames+0x92/0x250 net/ipv4/tcp_output.c:2892
tcp_push_pending_frames include/net/tcp.h:1916 [inline]
tcp_data_snd_check net/ipv4/tcp_input.c:5572 [inline]
tcp_rcv_established+0xb44/0x1cb0 net/ipv4/tcp_input.c:6068
tcp_v4_do_rcv+0x44b/0x9b0 net/ipv4/tcp_ipv4.c:1731
sk_backlog_rcv include/net/sock.h:1067 [inline]
__release_sock+0x1b9/0x420 net/core/sock.c:2730
release_sock+0x5b/0x1b0 net/core/sock.c:3271
sk_stream_wait_memory+0x6d8/0xe50 net/core/stream.c:145
tcp_sendmsg_locked+0x1c9f/0x3590 net/ipv4/tcp.c:1419
tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1457
sock_sendmsg_nosec net/socket.c:704 [inline]
__sock_sendmsg net/socket.c:716 [inline]
__sys_sendto+0x423/0x580 net/socket.c:2063
__do_sys_sendto net/socket.c:2075 [inline]
__se_sys_sendto net/socket.c:2071 [inline]
__x64_sys_sendto+0xda/0xf0 net/socket.c:2071
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: 0033:0x7f07ebe4eec9
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:00007f07ea0b6038 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f07ec0a5fa0 RCX: 00007f07ebe4eec9
RDX: fffffffffffffee9 RSI: 0000200000002240 RDI: 0000000000000007
RBP: 00007f07ebed1f91 R08: 0000000000000000 R09: 0000000000000049
R10: 0000000004004085 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f07ec0a6038 R14: 00007f07ec0a5fa0 R15: 00007ffc19872f38
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 4d 85 e4 test %r12,%r12
3: 75 16 jne 0x1b
5: e8 54 cc 0f 00 call 0xfcc5e
a: eb 15 jmp 0x21
c: e8 4d cc 0f 00 call 0xfcc5e
11: e8 88 30 41 08 call 0x841309e
16: 4d 85 e4 test %r12,%r12
19: 74 ea je 0x5
1b: e8 3e cc 0f 00 call 0xfcc5e
20: fb sti
21: 48 c7 04 24 0e 36 e0 movq $0x45e0360e,(%rsp)
28: 45
* 29: 4b c7 04 3e 00 00 00 movq $0x0,(%r14,%r15,1) <-- trapping instruction
30: 00
31: 66 43 c7 44 3e 09 00 movw $0x0,0x9(%r14,%r15,1)
38: 00
39: 43 c6 44 3e 0b 00 movb $0x0,0xb(%r14,%r15,1)