SYZFAIL: tun: can't open /dev/net/tun

Status: upstream: reported syz repro on 2021/10/09 05:44
Reported-by: syzbot+8e7ab08813277a9ae8d8@syzkaller.appspotmail.com
First crash: 1773d, last: 1631d
Fix bisection: failed (error log, bisect log)
  
▶ ▼ Similar bugs (12)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 SYZFAIL: tun: can't open /dev/net/tun (2) origin:lts-only -1 syz error 12 186d 307d 0/3 upstream: reported syz repro on 2025/10/14 07:23
linux-5.15 SYZFAIL: tun: can't open /dev/net/tun (2) origin:lts-only -1 syz error 4 16d 283d 0/3 upstream: reported syz repro on 2025/11/07 16:34
android-5-10 SYZFAIL: tun: can't open /dev/net/tun -1 1 1744d 1744d 0/2 auto-closed as invalid on 2022/02/05 06:28
android-5-15 SYZFAIL: tun: can't open /dev/net/tun origin:upstream -1 syz error 37 8d06h 1011d 0/2 premoderation: reported syz repro on 2023/11/10 07:03
android-5-10 SYZFAIL: tun: can't open /dev/net/tun (2) -1 syz error error 82 14h59m 1632d 0/2 premoderation: reported syz repro on 2022/02/27 16:56
android-54 SYZFAIL: tun: can't open /dev/net/tun -1 syz 18 459d 1820d 0/2 upstream: reported syz repro on 2021/08/23 10:35
android-6-1 SYZFAIL: tun: can't open /dev/net/tun origin:upstream -1 syz error error 39 102d 1012d 0/2 premoderation: reported syz repro on 2023/11/09 20:06
linux-5.15 SYZFAIL: tun: can't open /dev/net/tun -1 1 627d 627d 0/3 auto-obsoleted due to no activity on 2025/03/08 18:06
upstream SYZFAIL: tun: can't open /dev/net/tun -1 1 1927d 1927d 0/29 auto-closed as invalid on 2021/08/06 17:44
android-6-12 SYZFAIL: tun: can't open /dev/net/tun origin:upstream -1 syz 54 12d 412d 0/1 premoderation: reported syz repro on 2025/07/01 04:36
linux-6.1 SYZFAIL: tun: can't open /dev/net/tun origin:upstream -1 syz done 1 687d 991d 3/3 fixed on 2024/11/01 17:06
linux-6.6 SYZFAIL: tun: can't open /dev/net/tun origin:lts-only -1 syz error 5 221d 281d 0/2 upstream: reported syz repro on 2025/11/09 04:42

Sample crash report:
2022/02/27 17:07:40 executor failed 11 times: executor 5: failed to write control pipe: write |1: broken pipe
SYZFAIL: tun: can't open /dev/net/tun
 (errno 2: No such file or directory)
loop exited with status 67

Crashes (3):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2022/02/27 17:27 linux-4.19.y 3f8a27f9e27b 45a13a73 .config console log report syz ci2-linux-4-19 SYZFAIL: tun: can't open /dev/net/tun
2021/10/09 05:44 linux-4.19.y 6db10b4d5efd efe0f24d .config console log report syz ci2-linux-4-19 SYZFAIL: tun: can't open /dev/net/tun
2022/02/28 14:19 linux-4.19.y 3f8a27f9e27b 45a13a73 .config console log report info ci2-linux-4-19 SYZFAIL: tun: can't open /dev/net/tun
* Struck through repros no longer work on HEAD.