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: 1086d, last: 7h21m
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 21 2d11h 382d 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 17 2d11h 358d 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 1819d 1819d 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 749 45m 1086d 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 745 14m 1707d 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 534d 1895d 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 1706d 1848d 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 702d 702d 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 2002d 2002d 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 687 5m 487d 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 761d 1066d 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 16 1d08h 356d 0/2 upstream: reported syz repro on 2025/11/09 04:42
▶ ▼ Last patch testing requests (6)
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
▶ ▼ 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 (549):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/09/26 09:11 android14-6.1 3d4bd33f0b0b a3c7249d .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/02/14 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
2026/10/31 11:43 android14-6.1 eff17ca626fd 2041d3f8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/10/30 22:08 android14-6.1 17f0538436d1 0ec395f8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/10/30 12:27 android14-6.1 17f0538436d1 b498adee .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/10/30 08:45 android14-6.1 00ed7c2479b4 b498adee .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/10/30 07:24 android14-6.1 00ed7c2479b4 b498adee .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/10/30 03:18 android14-6.1 00ed7c2479b4 b498adee .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/10/29 22:59 android14-6.1 00ed7c2479b4 b498adee .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/10/29 18:31 android14-6.1 00ed7c2479b4 b498adee .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/10/29 16:08 android14-6.1 00ed7c2479b4 b1d00f76 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/10/29 10:28 android14-6.1 00ed7c2479b4 b1d00f76 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/10/29 08:17 android14-6.1 00ed7c2479b4 b1d00f76 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/10/29 04:08 android14-6.1 00ed7c2479b4 b1d00f76 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/10/29 04:07 android14-6.1 00ed7c2479b4 b1d00f76 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/10/29 00:40 android14-6.1 00ed7c2479b4 858db2ec .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/10/28 19:45 android14-6.1 b83ca11f560a 858db2ec .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/10/28 18:29 android14-6.1 b83ca11f560a 858db2ec .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/10/28 16:59 android14-6.1 b83ca11f560a 858db2ec .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/10/28 12:45 android14-6.1 b83ca11f560a 858db2ec .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/10/28 11:21 android14-6.1 b83ca11f560a 858db2ec .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/10/28 07:23 android14-6.1 b83ca11f560a 96923c60 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/10/28 07:20 android14-6.1 b83ca11f560a 96923c60 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/10/28 06:12 android14-6.1 b83ca11f560a 96923c60 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/10/28 04:17 android14-6.1 0c2ef8c1e2db 96923c60 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/10/28 01:46 android14-6.1 0c2ef8c1e2db 96923c60 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/10/27 21:11 android14-6.1 0c2ef8c1e2db 96923c60 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/10/27 18:41 android14-6.1 0c2ef8c1e2db 96923c60 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/10/27 16:56 android14-6.1 0c2ef8c1e2db 96923c60 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/10/27 16:55 android14-6.1 0c2ef8c1e2db 96923c60 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/10/27 13:12 android14-6.1 0c2ef8c1e2db 168cb7a2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/10/27 11:45 android14-6.1 0c2ef8c1e2db 168cb7a2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/10/27 10:27 android14-6.1 e7e4a657fff8 168cb7a2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/10/27 07:08 android14-6.1 e7e4a657fff8 168cb7a2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/10/27 02:17 android14-6.1 e7e4a657fff8 168cb7a2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/10/26 23:37 android14-6.1 e7e4a657fff8 168cb7a2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/10/26 19:04 android14-6.1 e7e4a657fff8 168cb7a2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/10/26 15:21 android14-6.1 e7e4a657fff8 168cb7a2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/10/26 15:06 android14-6.1 e7e4a657fff8 168cb7a2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/10/26 12:59 android14-6.1 2f0d864181b9 168cb7a2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/10/26 10:45 android14-6.1 2f0d864181b9 1d9ca40b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/10/26 08:59 android14-6.1 2f0d864181b9 1d9ca40b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/10/26 07:37 android14-6.1 2f0d864181b9 1d9ca40b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/10/26 06:24 android14-6.1 2f0d864181b9 1d9ca40b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/10/26 06:13 android14-6.1 2f0d864181b9 1d9ca40b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/10/26 04:02 android14-6.1 2f0d864181b9 1d9ca40b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/09/21 12:53 android14-6.1 8cef8b5b11b7 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf SYZFAIL: tun: can't open /dev/net/tun
2026/09/16 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
2026/01/08 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
* Struck through repros no longer work on HEAD.