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

Status: premoderation: reported syz repro on 2023/11/09 20:06
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+6e6c465d65a116c3e69a@syzkaller.appspotmail.com
First crash: 1044d, last: 4h21m
Cause bisection: failed (error log, bisect log)
  
Fix bisection: failed (error log, bisect log)
  
▶ ▼ Bug presence (2)
Date Name Commit Repro Result
2023/11/09 lts (merge base) 52a953d0934b syz [report] SYZFAIL: tun: can't open /dev/net/tun
2023/11/09 upstream (ToT) 6bc986ab839c syz [report] SYZFAIL: tun: can't open /dev/net/tun
▶ ▼ 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 13 1d03h 340d 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 19d 315d 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 1777d 1777d 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 102 1d22h 1044d 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 155 2d14h 1664d 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 492d 1853d 0/2 upstream: reported syz repro on 2021/08/23 10:35
linux-4.19 SYZFAIL: tun: can't open /dev/net/tun -1 syz error 3 1664d 1806d 0/1 upstream: reported syz repro on 2021/10/09 05:44
linux-5.15 SYZFAIL: tun: can't open /dev/net/tun -1 1 659d 659d 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 1959d 1959d 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 97 2h19m 445d 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 719d 1023d 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 253d 314d 0/2 upstream: reported syz repro on 2025/11/09 04:42
▶ ▼ Last patch testing requests (8)
Created Duration User Patch Repo Result
2026/08/17 08:34 1h51m retest repro android14-6.1 error job log
2026/08/17 08:34 1h48m retest repro android14-6.1 error job log
2026/08/17 08:34 4m retest repro android14-6.1 error job log
2026/08/17 08:34 3m retest repro android14-6.1 error job log
2026/08/17 08:34 7m retest repro android14-6.1 error job log
2026/07/22 05:17 15m retest repro android14-6.1 log
2026/07/22 05:17 16m retest repro android14-6.1 log
2026/07/22 05:17 14m retest repro android14-6.1 log
▶ ▼ Fix bisection attempts (5)
Created Duration User Patch Repo Result
2026/04/05 14:08 0m bisect fix android14-6.1 error job log
2025/02/10 02:28 1h06m bisect fix android14-6.1 OK (0) job log log
2024/03/19 19:09 1h13m bisect fix android14-6.1 OK (0) job log log
2024/01/25 20:39 41m bisect fix android14-6.1 OK (0) job log log
2023/12/26 11:27 40m bisect fix android14-6.1 OK (0) job log log

Sample crash report:
SYZFAIL: tun: can't open /dev/net/tun
 (errno 2: No such file or directory)
loop exited with status 67
SYZFAIL: tun: can't open /dev/net/tun
 (errno 2: No such file or directory)
loop exited with status 67
SYZFAIL: tun: can't open /dev/net/tun
 (errno 2: No such file or directory)
loop exited with status 67
SYZFAIL: tun: can't open /dev/net/tun
 (errno 2: No such file or directory)
loop exited with status 67
SYZFAIL: tun: can't open /dev/net/tun
 (errno 2: No such file or directory)
loop exited with status 67
SYZFAIL: tun: can't open /dev/net/tun
 (errno 2: No such file or directory)
loop exited with status 67
SYZFAIL: tun: can't open /dev/net/tun
 (errno 2: No such file or directory)
loop exited with status 67
SYZFAIL: tun: can't open /dev/net/tun
 (errno 2: No such file or directory)
loop exited with status 67
SYZFAIL: tun: can't open /dev/net/tun
 (errno 2: No such file or directory)
loop exited with status 67
SYZFAIL: tun: can't open /dev/net/tun
 (errno 2: No such file or directory)
loop exited with status 67
SYZFAIL: tun: can't open /dev/net/tun
 (errno 2: No such file or directory)
loop exited with status 67
SYZFAIL: tun: can't open /dev/net/tun
 (errno 2: No such file or directory)
loop exited with status 67
SYZFAIL: tun: can't open /dev/net/tun
 (errno 2: No such file or directory)
loop exited with status 67
SYZFAIL: tun: can't open /dev/net/tun
 (errno 2: No such file or directory)
loop exited with status 67
SYZFAIL: tun: can't open /dev/net/tun
 (errno 2: No such file or directory)
loop exited with status 67
SYZFAIL: tun: can't open /dev/net/tun
 (errno 2: No such file or directory)
loop exited with status 67
SYZFAIL: tun: can't open /dev/net/tun
 (errno 2: No such file or directory)
loop exited with status 67
SYZFAIL: tun: can't open /dev/net/tun
 (errno 2: No such file or directory)
loop exited with status 67
SYZFAIL: tun: can't open /dev/net/tun
 (errno 2: No such file or directory)
loop exited with status 67
SYZFAIL: tun: can't open /dev/net/tun
 (errno 2: No such file or directory)
loop exited with status 67
SYZFAIL: tun: can't open /dev/net/tun
 (errno 2: No such file or directory)
loop exited with status 67
SYZFAIL: repeatedly failed to execute the program
proc=2 req=617 state=3 status=67 (errno 9: Bad file descriptor)
connection error: failed to recv *flatrpc.ExecutorMessageRawT: EOF

Crashes (79):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/02/14 21:01 android14-6.1 edbe3e111301 1e62d198 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/02/13 11:38 android14-6.1 edbe3e111301 6a673c50 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/02/09 05:21 android14-6.1 c9e2710a7bd0 4c131dc4 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/02/08 15:56 android14-6.1 c9e2710a7bd0 4c131dc4 .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/01/19 18:53 android14-6.1 37a76cbe8f87 a9fc5226 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2025/12/22 03:12 android14-6.1 72ada78f601d d6526ea3 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2025/12/19 10:54 android14-6.1 72ada78f601d d6526ea3 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2025/12/16 08:40 android14-6.1 6f1c2f8fd8c8 d6526ea3 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2025/12/15 06:38 android14-6.1 6f1c2f8fd8c8 d6526ea3 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2025/12/03 12:41 android14-6.1 5ddae867b428 d6526ea3 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2025/11/07 15:43 android14-6.1 50ba6c46f3ac 4e1406b4 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf SYZFAIL: tun: can't open /dev/net/tun
2023/11/09 20:05 android14-6.1 9d6ac9dc6ac8 56230772 .config console log report syz [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/09/19 11:39 android14-6.1 8cef8b5b11b7 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/09/19 06:00 android14-6.1 8cef8b5b11b7 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/09/19 03:25 android14-6.1 8cef8b5b11b7 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/09/18 12:59 android14-6.1 8cef8b5b11b7 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/09/18 08:22 android14-6.1 8cef8b5b11b7 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/09/18 06:50 android14-6.1 8cef8b5b11b7 8d7d05f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/09/17 23:35 android14-6.1 8cef8b5b11b7 8d7d05f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/09/17 18:33 android14-6.1 22764d91f0ef 8d7d05f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/09/17 01:56 android14-6.1 22764d91f0ef 95928915 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/09/16 17:17 android14-6.1 17514ea4a941 12a0a44a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/09/16 11:55 android14-6.1 c5dd09d80de6 12a0a44a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf SYZFAIL: tun: can't open /dev/net/tun
2026/09/14 15:04 android14-6.1 f52fadf7c78f 81a27d1a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/09/14 10:57 android14-6.1 f52fadf7c78f 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/09/13 09:16 android14-6.1 6308d6d3f1b1 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/09/10 03:24 android14-6.1 6f22c036600e 4e8b1cc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/09/10 01:14 android14-6.1 6f22c036600e 4e8b1cc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/09/09 18:30 android14-6.1 6f22c036600e 4e8b1cc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/09/09 15:22 android14-6.1 6f22c036600e 8387c273 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/09/09 15:22 android14-6.1 6f22c036600e 8387c273 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/02/20 13:11 android14-6.1 edbe3e111301 17d780d6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/01/19 12:56 android14-6.1 37a76cbe8f87 a9fc5226 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/01/08 19:17 android14-6.1 524f9ed7e312 d6526ea3 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf SYZFAIL: tun: can't open /dev/net/tun
2025/12/29 02:57 android14-6.1 5e6db7045704 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2025/12/08 05:13 android14-6.1 5ddae867b428 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2025/08/27 07:32 android14-6.1 47b374a18638 e12e5ba4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf SYZFAIL: tun: can't open /dev/net/tun
2025/07/20 14:16 android14-6.1 145c7fad733f 7117feec .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2025/04/23 12:46 android14-6.1 642656a36791 53a8b9bd .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf SYZFAIL: tun: can't open /dev/net/tun
2025/03/23 20:50 android14-6.1 5145d157731f 4e8d3850 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2025/03/23 20:50 android14-6.1 5145d157731f 4e8d3850 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2025/03/23 20:50 android14-6.1 5145d157731f 4e8d3850 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2025/03/22 12:43 android14-6.1 5145d157731f c6512ef7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2025/03/22 12:41 android14-6.1 5145d157731f c6512ef7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2025/03/22 12:37 android14-6.1 5145d157731f c6512ef7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2024/10/09 05:41 android14-6.1 8d298374716d 402f1df0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf SYZFAIL: tun: can't open /dev/net/tun
2024/10/07 00:22 android14-6.1 d4dab27b9d1c d7906eff .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf SYZFAIL: tun: can't open /dev/net/tun
2024/09/30 21:15 android14-6.1 5162f9a67b7d bbd4e0a4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf SYZFAIL: tun: can't open /dev/net/tun
2024/09/29 18:31 android14-6.1 110595418159 ba29ff75 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf SYZFAIL: tun: can't open /dev/net/tun
2024/09/27 13:08 android14-6.1 5a912daf8731 9314348a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf SYZFAIL: tun: can't open /dev/net/tun
2024/09/21 03:31 android14-6.1 532fad0092e5 6f888b75 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2024/09/20 00:37 android14-6.1 8a268cb981a6 6f888b75 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf SYZFAIL: tun: can't open /dev/net/tun
2024/09/18 08:12 android14-6.1 47871c381d5f c673ca06 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf SYZFAIL: tun: can't open /dev/net/tun
2024/08/20 11:17 android14-6.1 edca080b95df 9f0ab3fb .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf SYZFAIL: tun: can't open /dev/net/tun
2024/08/12 19:15 android14-6.1 79436849ef1d 842184b3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2024/08/12 06:26 android14-6.1 79436849ef1d 6f4edef4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf SYZFAIL: tun: can't open /dev/net/tun
2024/06/30 13:44 android14-6.1 76d91af9daec 757f06b1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf SYZFAIL: tun: can't open /dev/net/tun
2024/06/30 06:21 android14-6.1 76d91af9daec 757f06b1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf SYZFAIL: tun: can't open /dev/net/tun
* Struck through repros no longer work on HEAD.