syzbot
WARNING in __dev_change_net_namespace
Status:
premoderation: reported on 2026/10/06 03:03
Reported-by: syzbot+b4d31abc595c5800bbad@syzkaller.appspotmail.com
First crash: 4d10h, last: 4d10h
Sample crash report:
RDX: 0000000000048000 RSI: 0000200000000740 RDI: 0000000000000006
RBP: 00007f63522358e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6352426038 R14: 00007f6352425fa0 R15: 00007ffd4cbd9bd8
</TASK>
------------[ cut here ]------------
WARNING: CPU: 0 PID: 811 at net/core/dev.c:11749 __dev_change_net_namespace+0x154f/0x16c0 net/core/dev.c:11749
Modules linked in:
CPU: 0 UID: 0 PID: 811 Comm: syz.2.122 Not tainted syzkaller #0 3cc70382b65b9d7164db2b4c9185747e14a17ef7
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
RIP: 0010:__dev_change_net_namespace+0x154f/0x16c0 net/core/dev.c:11749
Code: 05 70 96 60 03 01 48 c7 c7 40 0d 8b 86 48 c7 c6 20 0d 8b 86 ba 7a 2d 00 00 e8 4d 74 7f fc 0f 0b e9 3b ec ff ff e8 c1 a2 02 fd <0f> 0b e9 d7 fa ff ff e8 b5 a2 02 fd 0f 0b e9 95 fe ff ff e8 a9 a2
RSP: 0018:ffffc9000d90eae0 EFLAGS: 00010283
RAX: ffffffff8484d5df RBX: 1ffff1102618a4be RCX: 0000000000080000
RDX: ffffc90002a56000 RSI: 0000000000026c75 RDI: 0000000000026c76
RBP: ffffc9000d90eed0 R08: ffffffff81e0297e R09: ffffffff81e05944
R10: ffffffff81e05944 R11: ffffffff81e02e5f R12: dffffc0000000000
R13: ffff888130c52118 R14: ffff888130c525f4 R15: 00000000fffffff4
FS: 00007f6352fc56c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000011dff6000 CR4: 00000000003526b0
Call Trace:
<TASK>
do_setlink+0x316/0x41e0 net/core/rtnetlink.c:2841
__rtnl_newlink net/core/rtnetlink.c:3732 [inline]
rtnl_newlink+0x1801/0x2220 net/core/rtnetlink.c:3779
rtnetlink_rcv_msg+0x8be/0xa40 net/core/rtnetlink.c:6679
netlink_rcv_skb+0x24d/0x4e0 net/netlink/af_netlink.c:2554
rtnetlink_rcv+0x20/0x30 net/core/rtnetlink.c:6697
netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]
netlink_unicast+0x8bc/0xa70 net/netlink/af_netlink.c:1340
netlink_sendmsg+0x7d1/0xad0 net/netlink/af_netlink.c:1895
sock_sendmsg_nosec net/socket.c:712 [inline]
__sock_sendmsg net/socket.c:727 [inline]
____sys_sendmsg+0x99e/0xa00 net/socket.c:2583
___sys_sendmsg+0x2a6/0x370 net/socket.c:2637
__sys_sendmsg net/socket.c:2669 [inline]
__do_sys_sendmsg net/socket.c:2674 [inline]
__se_sys_sendmsg net/socket.c:2672 [inline]
__x64_sys_sendmsg+0x1be/0x2a0 net/socket.c:2672
x64_sys_call+0x2a4c/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:47
do_syscall_x64 arch/x86/entry/common.c:47 [inline]
do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78
entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f635219e199
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:00007f6352fc5028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f6352425fa0 RCX: 00007f635219e199
RDX: 0000000000048000 RSI: 0000200000000740 RDI: 0000000000000006
RBP: 00007f63522358e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6352426038 R14: 00007f6352425fa0 R15: 00007ffd4cbd9bd8
</TASK>
---[ end trace 0000000000000000 ]---
veth1_to_hsr: entered promiscuous mode
veth1_to_hsr: entered allmulticast mode
* Struck through repros no longer work on HEAD.