skbuff: skb_under_panic: text:ffffffff8a25ec78 len:112 put:40 head:ffff88807e0d0000 data:ffff88807e0cffe8 tail:0x58 end:0x180 dev:team0
------------[ cut here ]------------
kernel BUG at net/core/skbuff.c:213!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 1 UID: 0 PID: 11755 Comm: syz.1.2212 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:skb_panic+0x157/0x160 net/core/skbuff.c:213
Code: c7 60 9c 6f 8c 48 8b 74 24 08 48 8b 54 24 10 8b 0c 24 44 8b 44 24 04 4d 89 e9 50 55 41 57 41 56 e8 ce 6a f5 ff 48 83 c4 20 90 <0f> 0b cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90000a086e0 EFLAGS: 00010282
RAX: 0000000000000087 RBX: dffffc0000000000 RCX: 16a8d49c71e75300
RDX: 0000000000000100 RSI: 0000000080000100 RDI: 0000000000000000
RBP: 0000000000000180 R08: ffffc90000a08447 R09: 1ffff92000141088
R10: dffffc0000000000 R11: fffff52000141089 R12: ffff888055fdf3d0
R13: ffff88807e0d0000 R14: ffff88807e0cffe8 R15: 0000000000000058
FS: 00007f1d295fe6c0(0000) GS:ffff888125f1f000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055557650f808 CR3: 0000000046948000 CR4: 0000000000350ef0
Call Trace:
skb_under_panic net/core/skbuff.c:223 [inline]
skb_push+0xc3/0xe0 net/core/skbuff.c:2641
ip6gre_header+0xc8/0x790 net/ipv6/ip6_gre.c:1371
dev_hard_header include/linux/netdevice.h:3436 [inline]
neigh_connected_output+0x286/0x460 net/core/neighbour.c:1618
NF_HOOK_COND include/linux/netfilter.h:307 [inline]
ip6_output+0x340/0x550 net/ipv6/ip6_output.c:247
NF_HOOK include/linux/netfilter.h:318 [inline]
ndisc_send_skb+0xbce/0x1510 net/ipv6/ndisc.c:512
addrconf_rs_timer+0x369/0x6a0 net/ipv6/addrconf.c:4037
call_timer_fn+0x16e/0x590 kernel/time/timer.c:1748
expire_timers kernel/time/timer.c:1799 [inline]
__run_timers kernel/time/timer.c:2373 [inline]
__run_timer_base+0x61a/0x860 kernel/time/timer.c:2385
run_timer_base kernel/time/timer.c:2394 [inline]
run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2404
handle_softirqs+0x22b/0x7c0 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0x60/0x150 kernel/softirq.c:723
irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1056
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:__kasan_check_byte+0x14/0x40 mm/kasan/common.c:572
Code: 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 41 56 53 48 89 f3 49 89 fe e8 ae 14 00 00 84 c0 <75> 16 be 01 00 00 00 4c 89 f7 31 d2 48 89 d9 89 c3 e8 a6 03 00 00
RSP: 0018:ffffc9012001f930 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffffffff820e7ffc RCX: 0000000080000001
RDX: 0000000000000000 RSI: ffffffff820e7ffc RDI: 1ffff1100a24f378
RBP: ffffffff820e7fe0 R08: 0000000000000001 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff52024003f5b R12: 0000000000000001
R13: ffff888051279bc0 R14: ffff888051279bc0 R15: 0000000000000001
kasan_check_byte include/linux/kasan.h:401 [inline]
lock_acquire+0x84/0x340 kernel/locking/lockdep.c:5842
__might_fault+0xcc/0x130 mm/memory.c:7174
_inline_copy_from_user include/linux/uaccess.h:169 [inline]
_copy_from_user+0x28/0xb0 lib/usercopy.c:18
copy_from_user include/linux/uaccess.h:223 [inline]
copy_msghdr_from_user net/socket.c:2522 [inline]
recvmsg_copy_msghdr net/socket.c:2778 [inline]
___sys_recvmsg+0x12e/0x510 net/socket.c:2850
do_recvmmsg+0x307/0x770 net/socket.c:2949
__sys_recvmmsg net/socket.c:3023 [inline]
__do_sys_recvmmsg net/socket.c:3046 [inline]
__se_sys_recvmmsg net/socket.c:3039 [inline]
__x64_sys_recvmmsg+0x190/0x240 net/socket.c:3039
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1d2878f749
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:00007f1d295fe038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007f1d289e6090 RCX: 00007f1d2878f749
RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000003
RBP: 00007f1d28813f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1d289e6128 R14: 00007f1d289e6090 R15: 00007fff55424e48
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:skb_panic+0x157/0x160 net/core/skbuff.c:213
Code: c7 60 9c 6f 8c 48 8b 74 24 08 48 8b 54 24 10 8b 0c 24 44 8b 44 24 04 4d 89 e9 50 55 41 57 41 56 e8 ce 6a f5 ff 48 83 c4 20 90 <0f> 0b cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90000a086e0 EFLAGS: 00010282
RAX: 0000000000000087 RBX: dffffc0000000000 RCX: 16a8d49c71e75300
RDX: 0000000000000100 RSI: 0000000080000100 RDI: 0000000000000000
RBP: 0000000000000180 R08: ffffc90000a08447 R09: 1ffff92000141088
R10: dffffc0000000000 R11: fffff52000141089 R12: ffff888055fdf3d0
R13: ffff88807e0d0000 R14: ffff88807e0cffe8 R15: 0000000000000058
FS: 00007f1d295fe6c0(0000) GS:ffff888125f1f000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055557650f808 CR3: 0000000046948000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 80 00 00 addb $0x0,(%rax)
3: 00 00 add %al,(%rax)
5: 90 nop
6: 90 nop
7: 90 nop
8: 90 nop
9: 90 nop
a: 90 nop
b: 90 nop
c: 90 nop
d: 90 nop
e: 90 nop
f: 90 nop
10: 90 nop
11: 90 nop
12: 90 nop
13: 90 nop
14: 90 nop
15: 0f 1f 40 d6 nopl -0x2a(%rax)
19: 41 56 push %r14
1b: 53 push %rbx
1c: 48 89 f3 mov %rsi,%rbx
1f: 49 89 fe mov %rdi,%r14
22: e8 ae 14 00 00 call 0x14d5
27: 84 c0 test %al,%al
* 29: 75 16 jne 0x41 <-- trapping instruction
2b: be 01 00 00 00 mov $0x1,%esi
30: 4c 89 f7 mov %r14,%rdi
33: 31 d2 xor %edx,%edx
35: 48 89 d9 mov %rbx,%rcx
38: 89 c3 mov %eax,%ebx
3a: e8 a6 03 00 00 call 0x3e5