SYZFAIL: netlink_send_ext: short netlink write

Status: upstream: reported syz repro on 2021/02/22 10:25
Reported-by: syzbot+8de15481ae9ab73e97bd@syzkaller.appspotmail.com
First crash: 2000d, last: 460d
▶ ▼ Similar bugs (6)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 SYZFAIL: netlink_send_ext: short netlink write -1 syz error 29 1794d 2000d 0/1 upstream: reported syz repro on 2021/02/22 17:18
android-6-1 SYZFAIL: netlink_send_ext: short netlink write -1 1 639d 639d 0/2 auto-obsoleted due to no activity on 2025/02/11 23:46
android-5-10 SYZFAIL: netlink_send_ext: short netlink write (2) -1 2 461d 526d 0/2 auto-obsoleted due to no activity on 2025/08/09 13:16
android-5-10 SYZFAIL: netlink_send_ext: short netlink write -1 4 673d 762d 0/2 auto-obsoleted due to no activity on 2025/01/09 14:03
linux-4.14 SYZFAIL: netlink_send_ext: short netlink write -1 syz error 40 1596d 2000d 0/1 upstream: reported syz repro on 2021/02/21 20:56
android-5-15 SYZFAIL: netlink_send_ext: short netlink write -1 16 483d 760d 0/2 auto-obsoleted due to no activity on 2025/07/18 02:45
▶ ▼ Last patch testing requests (10)
Created Duration User Patch Repo Result
2026/07/28 04:25 16m retest repro android12-5.4 error
2026/07/28 04:25 16m retest repro android12-5.4 error
2026/07/28 04:25 16m retest repro android12-5.4 error
2026/07/28 04:25 20m retest repro android12-5.4 error
2026/07/28 04:25 17m retest repro android12-5.4 error
2026/06/22 23:58 52m retest repro android12-5.4 error
2026/06/22 23:58 18m retest repro android12-5.4 error
2026/06/22 23:58 18m retest repro android12-5.4 error
2026/06/22 23:58 24m retest repro android12-5.4 error
2026/06/22 23:58 16m retest repro android12-5.4 error

Sample crash report:
2021/03/03 07:02:07 result: hanged=false err=executor 0: exit status 67
SYZFAIL: netlink_send_ext: short netlink write
SYZFAIL: netlink_send_ext: short netlink write
SYZFAIL: netlink_send_ext: short netlink write
wrote=-1, want=40 (errno 9: Bad file descriptor)
SYZFAIL: child failed
 (errno 0: Success)
loop exited with status 67


SYZFAIL: netlink_send_ext: short netlink write
SYZFAIL: netlink_send_ext: short netlink write
SYZFAIL: netlink_send_ext: short netlink write
wrote=-1, want=40 (errno 9: Bad file descriptor)
SYZFAIL: child failed
 (errno 0: Success)
loop exited with status 67
2021/03/03 07:02:08 executed programs: 544
2021/03/03 07:02:09 result: hanged=false err=executor 0: exit status 67
SYZFAIL: netlink_send_ext: short netlink write
SYZFAIL: netlink_send_ext: short netlink write
SYZFAIL: netlink_send_ext: short netlink write
SYZFAIL: netlink_send_ext: netlink read failed
 (errno 9: Bad file descriptor)
SYZFAIL: child failed
 (errno 0: Success)
loop exited with status 67


SYZFAIL: netlink_send_ext: short netlink write
SYZFAIL: netlink_send_ext: short netlink write
SYZFAIL: netlink_send_ext: short netlink write
SYZFAIL: netlink_send_ext: netlink read failed
 (errno 9: Bad file descriptor)
SYZFAIL: child failed
 (errno 0: Success)
loop exited with status 67
2021/03/03 07:02:13 executed programs: 1344
2021/03/03 07:02:14 result: hanged=false err=executor 0: exit status 67
SYZFAIL: netlink_send_ext: short netlink write
SYZFAIL: netlink_send_ext: short netlink write
SYZFAIL: netlink_send_ext: short netlink write
SYZFAIL: netlink_send_ext: short netlink write
SYZFAIL: netlink_send_ext: short netlink write
SYZFAIL: netlink_send_ext: short netlink write
SYZFAIL: netlink_send_ext: short netlink write
SYZFAIL: netlink_send_ext: short netlink write
SYZFAIL: netlink_send_ext: short netlink write
SYZFAIL: netlink_send_ext: short netlink write
SYZFAIL: netlink_send_ext: short netlink write
SYZFAIL: netlink_send_ext: short netlink write
wrote=-1, want=40 (errno 9: Bad file descriptor)
SYZFAIL: child failed
 (errno 0: Success)
loop exited with status 67


SYZFAIL: netlink_send_ext: short netlink write
SYZFAIL: netlink_send_ext: short netlink write
SYZFAIL: netlink_send_ext: short netlink write
SYZFAIL: netlink_send_ext: short netlink write
SYZFAIL: netlink_send_ext: short netlink write
SYZFAIL: netlink_send_ext: short netlink write
SYZFAIL: netlink_send_ext: short netlink write
SYZFAIL: netlink_send_ext: short netlink write
SYZFAIL: netlink_send_ext: short netlink write
SYZFAIL: netlink_send_ext: short netlink write
SYZFAIL: netlink_send_ext: short netlink write
SYZFAIL: netlink_send_ext: short netlink write
wrote=-1, want=40 (errno 9: Bad file descriptor)
SYZFAIL: child failed
 (errno 0: Success)
loop exited with status 67
2021/03/03 07:02:16 result: hanged=false err=executor 0: exit status 67
SYZFAIL: netlink_send_ext: short netlink write
SYZFAIL: netlink_send_ext: short netlink write
wrote=-1, want=40 (errno 9: Bad file descriptor)
SYZFAIL: netlink_send_ext: short netlink write
wrote=-1, want=40 (errno 9: Bad file descriptor)
SYZFAIL: child failed
 (errno 0: Success)
loop exited with status 67


SYZFAIL: netlink_send_ext: short netlink write
SYZFAIL: netlink_send_ext: short netlink write
wrote=-1, want=40 (errno 9: Bad file descriptor)
SYZFAIL: netlink_send_ext: short netlink write
wrote=-1, want=40 (errno 9: Bad file descriptor)
SYZFAIL: child failed
 (errno 0: Success)
loop exited with status 67
2021/03/03 07:02:16 result: hanged=false err=executor 0: exit status 67
SYZFAIL: netlink_send_ext: short netlink write
SYZFAIL: netlink_send_ext: short netlink write
wrote=-1, want=40 (errno 9: Bad file descriptor)
SYZFAIL: child failed
 (errno 0: Success)
loop exited with status 67


SYZFAIL: netlink_send_ext: short netlink write
SYZFAIL: netlink_send_ext: short netlink write
wrote=-1, want=40 (errno 9: Bad file descriptor)
SYZFAIL: child failed
 (errno 0: Success)
loop exited with status 67

Crashes (15):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2021/03/03 07:06 android12-5.4 5aa479507289 e5b64d68 .config console log report syz ci2-android-5-4-kasan SYZFAIL: netlink_send_ext: short netlink write
2021/03/02 17:36 android12-5.4 13369a790167 92ead296 .config console log report syz ci2-android-5-4-kasan SYZFAIL: netlink_send_ext: short netlink write
2021/03/01 09:41 android12-5.4 51f76f06a74d 4c37c133 .config console log report syz ci2-android-5-4-kasan SYZFAIL: netlink_send_ext: short netlink write
2021/02/27 21:28 android12-5.4 55e9d3c6b5f7 4c37c133 .config console log report syz ci2-android-5-4-kasan SYZFAIL: netlink_send_ext: short netlink write
2021/02/27 20:51 android12-5.4 55e9d3c6b5f7 4c37c133 .config console log report syz ci2-android-5-4-kasan SYZFAIL: netlink_send_ext: short netlink write
2021/02/24 15:12 android12-5.4 7ba24942b70e fcc6d71b .config console log report syz ci2-android-5-4-kasan SYZFAIL: netlink_send_ext: short netlink write
2021/02/23 20:32 android12-5.4 dcde7eeee6a2 fcc6d71b .config console log report syz ci2-android-5-4-kasan SYZFAIL: netlink_send_ext: short netlink write
2021/02/22 17:31 android12-5.4 6228b4887854 c26fb06b .config console log report syz ci2-android-5-4-kasan SYZFAIL: netlink_send_ext: short netlink write
2021/02/22 12:07 android12-5.4 35f4b1b90596 a659b3f1 .config console log report syz ci2-android-5-4-kasan SYZFAIL: netlink_send_ext: short netlink write
2021/02/22 10:24 android12-5.4 35f4b1b90596 a659b3f1 .config console log report syz ci2-android-5-4-kasan SYZFAIL: netlink_send_ext: short netlink write
2021/02/27 17:11 android12-5.4 55e9d3c6b5f7 4c37c133 .config console log report syz ci2-android-5-4-kasan SYZFAIL: netlink_send_ext: short netlink write
2021/03/03 04:58 android12-5.4 5aa479507289 e5b64d68 .config console log report syz ci2-android-5-4-kasan SYZFAIL: netlink_send_ext: short netlink write
2025/05/12 11:45 android12-5.4 cd8e74fa0fa3 77908e5f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-4-kasan SYZFAIL: netlink_send_ext: short netlink write
2025/05/11 01:21 android12-5.4 cd8e74fa0fa3 77908e5f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-4-kasan SYZFAIL: netlink_send_ext: short netlink write
2025/03/21 20:42 android12-5.4 41adfeb3d639 c6512ef7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-4-kasan SYZFAIL: netlink_send_ext: short netlink write
* Struck through repros no longer work on HEAD.