SYZFAIL: netlink_send_ext: short netlink write

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 29c52025 Linux 4.14.221
git tree: linux-4.14.y
console output: https://syzkaller.appspot.com/x/log.txt?x=10a0797f500000
kernel config: https://syzkaller.appspot.com/x/.config?x=83f668f81cfc5600
dashboard link: https://syzkaller.appspot.com/bug?extid=88c11be2275a32b8a43e
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1094fccad00000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+88c11b...@syzkaller.appspotmail.com

2021/02/21 20:51:30 result: hanged=false err=executor 0: exit status 67
wrote=-1, want=32wrote=-1, want=32wrote=-1, want=32wrote=-1, want=32 (errno 9: Bad file descriptor)
SYZFAIL: netlink_send_ext: short netlink write
(errno 0: Success)
SYZFAIL: child failed
loop exited with status 67


wrote=-1, want=32wrote=-1, want=32wrote=-1, want=32wrote=-1, want=32 (errno 9: Bad file descriptor)
SYZFAIL: netlink_send_ext: short netlink write
(errno 0: Success)
SYZFAIL: child failed
loop exited with status 67
2021/02/21 20:51:32 executed programs: 152
2021/02/21 20:51:33 result: hanged=false err=executor 0: exit status 67
wrote=-1, want=32wrote=-1, want=32 (errno 9: Bad file descriptor)
SYZFAIL: netlink_send_ext: short netlink write
(errno 0: Success)
SYZFAIL: child failed
loop exited with status 67


wrote=-1, want=32wrote=-1, want=32 (errno 9: Bad file descriptor)
SYZFAIL: netlink_send_ext: short netlink write
(errno 0: Success)
SYZFAIL: child failed
loop exited with status 67
2021/02/21 20:51:35 result: hanged=false err=executor 0: exit status 67
wrote=-1, want=32 (errno 9: Bad file descriptor)
SYZFAIL: netlink_send_ext: short netlink write
(errno 0: Success)
SYZFAIL: child failed
loop exited with status 67


wrote=-1, want=32 (errno 9: Bad file descriptor)
SYZFAIL: netlink_send_ext: short netlink write
(errno 0: Success)
SYZFAIL: child failed
loop exited with status 67
2021/02/21 20:51:37 executed programs: 184
2021/02/21 20:51:38 result: hanged=false err=executor 0: exit status 67
wrote=-1, want=32 (errno 9: Bad file descriptor)
SYZFAIL: netlink_send_ext: short netlink write
(errno 0: Success)
SYZFAIL: child failed
loop exited with status 67


wrote=-1, want=32 (errno 9: Bad file descriptor)
SYZFAIL: netlink_send_ext: short netlink write
(errno 0: Success)
SYZFAIL: child failed
loop exited with status 67


---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.

syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot can test patches for this issue, for details see:
https://goo.gl/tpsmEJ#testing-patches

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 255b58a2 Linux 4.19.176
git tree: linux-4.19.y
console output: https://syzkaller.appspot.com/x/log.txt?x=1506b596d00000
kernel config: https://syzkaller.appspot.com/x/.config?x=b270830ae46c1d6f
dashboard link: https://syzkaller.appspot.com/bug?extid=797b814ad2dfccb17400
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=121bd182d00000

IMPORTANT: if you fix the issue, please add the following tag to the commit:

Reported-by: syzbot+797b81...@syzkaller.appspotmail.com

2021/02/22 17:13:04 executed programs: 409
2021/02/22 17:13:05 result: hanged=false err=executor 0: exit status 67
wrote=-1, want=40 (errno 9: Bad file descriptor)
wrote=-1, want=40 (errno 9: Bad file descriptor)
wrote=-1, want=40wrote=-1, want=40 (errno 9: Bad file descriptor)

SYZFAIL: netlink_send_ext: short netlink write
(errno 0: Success)
SYZFAIL: child failed
loop exited with status 67

wrote=-1, want=40 (errno 9: Bad file descriptor)
wrote=-1, want=40 (errno 9: Bad file descriptor)
wrote=-1, want=40wrote=-1, want=40 (errno 9: Bad file descriptor)

SYZFAIL: netlink_send_ext: short netlink write
(errno 0: Success)
SYZFAIL: child failed
loop exited with status 67

2021/02/22 17:13:12 executed programs: 496