Hello,
syzbot found the following issue on:
HEAD commit: 14b58326 Linux 4.14.193
git tree: linux-4.14.y
console output:
https://syzkaller.appspot.com/x/log.txt?x=12d6679e900000
kernel config:
https://syzkaller.appspot.com/x/.config?x=68ef0287ccbc3b42
dashboard link:
https://syzkaller.appspot.com/bug?extid=8a712bc98b416071baea
compiler: gcc (GCC) 10.1.0-syz 20200507
syz repro:
https://syzkaller.appspot.com/x/repro.syz?x=12064c91900000
C reproducer:
https://syzkaller.appspot.com/x/repro.c?x=117f99f6900000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by:
syzbot+8a712b...@syzkaller.appspotmail.com
8021q: adding VLAN 0 to HW filter on device bond1
bond0: Enslaving bond1 as an active interface with an up link
bond1: The slave device specified does not support setting the MAC address
bond1 (unregistering): Released all slaves
------------[ cut here ]------------
WARNING: CPU: 0 PID: 6816 at net/core/dev.c:7222 rollback_registered_many+0x90d/0xb30 net/core/dev.c:7222
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 6816 Comm: syz-executor142 Not tainted 4.14.193-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x1b2/0x283 lib/dump_stack.c:58
panic+0x1f9/0x42d kernel/panic.c:183
__warn.cold+0x20/0x4b kernel/panic.c:547
report_bug+0x208/0x249 lib/bug.c:186
fixup_bug arch/x86/kernel/traps.c:177 [inline]
fixup_bug arch/x86/kernel/traps.c:172 [inline]
do_error_trap+0x195/0x2d0 arch/x86/kernel/traps.c:295
invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:964
RIP: 0010:rollback_registered_many+0x90d/0xb30 net/core/dev.c:7222
RSP: 0018:ffff8880948c74f8 EFLAGS: 00010297
RAX: ffff888093de0680 RBX: ffff8880948c7630 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffff888093de0f08 RDI: 0000000000000000
RBP: ffff8880862c1b40 R08: ffffffff887226a0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff8880948c7530 R14: ffff8880862c1bf0 R15: ffffffff83dce310
unregister_netdevice_many.part.0+0x18/0x2e0 net/core/dev.c:8284
unregister_netdevice_many+0x36/0x50 net/core/dev.c:8283
rtnl_delete_link net/core/rtnetlink.c:2375 [inline]
rtnl_dellink+0x25b/0x6a0 net/core/rtnetlink.c:2411
rtnetlink_rcv_msg+0x3be/0xb10 net/core/rtnetlink.c:4316
netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2433
netlink_unicast_kernel net/netlink/af_netlink.c:1287 [inline]
netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1313
netlink_sendmsg+0x62e/0xb80 net/netlink/af_netlink.c:1878
sock_sendmsg_nosec net/socket.c:646 [inline]
sock_sendmsg+0xb5/0x100 net/socket.c:656
___sys_sendmsg+0x6c8/0x800 net/socket.c:2062
__sys_sendmsg+0xa3/0x120 net/socket.c:2096
SYSC_sendmsg net/socket.c:2107 [inline]
SyS_sendmsg+0x27/0x40 net/socket.c:2103
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x449dc9
RSP: 002b:00007f3535b26d98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00000000006dfc88 RCX: 0000000000449dc9
RDX: 0000000000000000 RSI: 00000000200002c0 RDI: 0000000000000009
RBP: 00000000006dfc80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dfc8c
R13: 0000000000000000 R14: 0000000000000000 R15: 068500100000003c
Kernel Offset: disabled
Rebooting in 86400 seconds..
---
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