[v5.15] WARNING in bond_ipsec_del_sa

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 3330a8d33e08 Linux 5.15.201
git tree: linux-5.15.y
console output: https://syzkaller.appspot.com/x/log.txt?x=12c1a006580000
kernel config: https://syzkaller.appspot.com/x/.config?x=353ae28c40b35af5
dashboard link: https://syzkaller.appspot.com/bug?extid=2887d839c9d1a696cca8
compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/b65fe19af112/disk-3330a8d3.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/351948519a0d/vmlinux-3330a8d3.xz
kernel image: https://storage.googleapis.com/syzbot-assets/a3b3f8477595/bzImage-3330a8d3.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+2887d8...@syzkaller.appspotmail.com

netlink: 14 bytes leftover after parsing attributes in process `syz.7.1845'.
------------[ cut here ]------------
WARNING: CPU: 1 PID: 11897 at drivers/net/bonding/bond_main.c:528 bond_ipsec_del_sa+0x531/0x580 drivers/net/bonding/bond_main.c:528
Modules linked in:
CPU: 1 PID: 11897 Comm: syz.7.1845 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:bond_ipsec_del_sa+0x531/0x580 drivers/net/bonding/bond_main.c:528
Code: 00 00 00 00 fc ff df 4c 89 f7 48 c7 c6 a0 e7 ab 8a 4c 89 fa 48 c7 c1 a8 e0 e1 8b e8 49 aa 8a 04 e9 c8 fd ff ff e8 bf 50 48 fc <0f> 0b 41 80 3c 2c 00 0f 85 81 fc ff ff e9 84 fc ff ff 44 89 e1 80
RSP: 0018:ffffc90003396c90 EFLAGS: 00010283
RAX: ffffffff8530d181 RBX: ffff888073bcc400 RCX: 0000000000080000
RDX: ffffc9001237b000 RSI: 000000000000ea9c RDI: 000000000000ea9d
RBP: dffffc0000000000 R08: dffffc0000000000 R09: 1ffffffff203a618
R10: dffffc0000000000 R11: fffffbfff203a619 R12: 1ffff1100c4b4500
R13: ffff8880738c8000 R14: ffff88801b3b4000 R15: ffff8880625a2800
FS: 00007f22bfe446c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc28f24b368 CR3: 0000000073a81000 CR4: 00000000003506e0
Call Trace:
<TASK>
xfrm_dev_state_delete include/net/xfrm.h:1916 [inline]
__xfrm_state_delete+0x654/0xb20 net/xfrm/xfrm_state.c:696
xfrm_state_delete net/xfrm/xfrm_state.c:717 [inline]
xfrm_dev_state_flush+0x337/0x630 net/xfrm/xfrm_state.c:842
bond_master_netdev_event drivers/net/bonding/bond_main.c:3551 [inline]
bond_netdev_event+0x280/0xef0 drivers/net/bonding/bond_main.c:3700
notifier_call_chain kernel/notifier.c:83 [inline]
raw_notifier_call_chain+0xcb/0x160 kernel/notifier.c:391
call_netdevice_notifiers_extack net/core/dev.c:2074 [inline]
call_netdevice_notifiers net/core/dev.c:2088 [inline]
unregister_netdevice_many+0x1049/0x19f0 net/core/dev.c:11147
rtnl_delete_link net/core/rtnetlink.c:3114 [inline]
rtnl_dellink+0x52b/0x7b0 net/core/rtnetlink.c:3165
rtnetlink_rcv_msg+0x844/0xf30 net/core/rtnetlink.c:5684
netlink_rcv_skb+0x1f5/0x440 net/netlink/af_netlink.c:2507
netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
netlink_unicast+0x774/0x920 net/netlink/af_netlink.c:1344
netlink_sendmsg+0x8ba/0xbe0 net/netlink/af_netlink.c:1918
sock_sendmsg_nosec net/socket.c:706 [inline]
__sock_sendmsg net/socket.c:718 [inline]
____sys_sendmsg+0x5b7/0x8f0 net/socket.c:2445
___sys_sendmsg+0x236/0x2e0 net/socket.c:2499
__sys_sendmsg net/socket.c:2528 [inline]
__do_sys_sendmsg net/socket.c:2537 [inline]
__se_sys_sendmsg+0x1af/0x290 net/socket.c:2535
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: 0033:0x7f22c1c0b799
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:00007f22bfe44028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f22c1e85090 RCX: 00007f22c1c0b799
RDX: 0000000000000000 RSI: 0000200000000000 RDI: 0000000000000003
RBP: 00007f22c1ca1bd9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f22c1e85128 R14: 00007f22c1e85090 R15: 00007fff785dea98
</TASK>


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