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: 1054d, last: 13h43m
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 10d 350d 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 29d 325d 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 1787d 1787d 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 215 11h33m 1054d 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 173 22h45m 1674d 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 502d 1863d 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 1673d 1816d 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 669d 669d 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 1969d 1969d 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 207 2h43m 455d 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 729d 1033d 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 263d 324d 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 (136):
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
2026/09/28 21:32 android14-6.1 3d4bd33f0b0b a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/09/28 19:54 android14-6.1 3d4bd33f0b0b a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/09/28 13:38 android14-6.1 3d4bd33f0b0b a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/09/28 11:50 android14-6.1 3d4bd33f0b0b a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/09/28 08:28 android14-6.1 3d4bd33f0b0b a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/09/28 00:08 android14-6.1 3d4bd33f0b0b a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/09/27 11:40 android14-6.1 3d4bd33f0b0b a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/09/27 09:40 android14-6.1 3d4bd33f0b0b a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/09/26 22:38 android14-6.1 3d4bd33f0b0b a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/09/26 18:24 android14-6.1 3d4bd33f0b0b a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/09/26 10:24 android14-6.1 3d4bd33f0b0b a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/09/26 06:46 android14-6.1 3d4bd33f0b0b a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/09/26 05:33 android14-6.1 3d4bd33f0b0b a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/09/26 05:28 android14-6.1 3d4bd33f0b0b a3c7249d .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
2026/09/21 08:08 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
2026/09/21 06:54 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
2026/09/21 01:34 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
2026/09/20 23:30 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
2026/09/20 22:03 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
2026/09/20 18:50 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
2026/09/20 14:13 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
2026/09/20 12:21 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
2026/09/20 07:51 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
2026/09/20 05:49 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 20:12 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 16:38 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 16:30 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 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
2026/01/08 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.