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: 1102d, last: 29m
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 22 11d 397d 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 20 7d04h 373d 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 1834d 1834d 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 887 now 1101d 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 1397 1h19m 1722d 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 549d 1910d 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 1721d 1863d 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 717d 717d 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 2017d 2017d 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 1531 56m 502d 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 777d 1081d 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 20 5d02h 371d 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 (776):
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
2026/11/15 22:47 android14-6.1 c1e1dfc6e051 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/11/15 21:04 android14-6.1 c1e1dfc6e051 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/11/15 19:45 android14-6.1 c1e1dfc6e051 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/11/15 18:26 android14-6.1 c1e1dfc6e051 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/11/15 16:03 android14-6.1 c1e1dfc6e051 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/11/15 14:49 android14-6.1 c1e1dfc6e051 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/11/15 13:21 android14-6.1 c1e1dfc6e051 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/11/15 12:13 android14-6.1 c1e1dfc6e051 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/11/15 08:11 android14-6.1 c1e1dfc6e051 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/11/15 06:42 android14-6.1 c1e1dfc6e051 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/11/15 04:51 android14-6.1 c1e1dfc6e051 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/11/15 02:39 android14-6.1 c1e1dfc6e051 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/11/15 00:47 android14-6.1 c1e1dfc6e051 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/11/15 00:36 android14-6.1 c1e1dfc6e051 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/11/14 22:24 android14-6.1 c1e1dfc6e051 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/11/14 20:09 android14-6.1 c1e1dfc6e051 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/11/14 18:14 android14-6.1 c1e1dfc6e051 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/11/14 12:23 android14-6.1 c1e1dfc6e051 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/11/14 00:29 android14-6.1 c1e1dfc6e051 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/11/14 00:28 android14-6.1 c1e1dfc6e051 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/11/13 16:41 android14-6.1 c1e1dfc6e051 be5d1971 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/11/13 14:38 android14-6.1 ffdc7c21c9c5 be5d1971 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/11/13 12:37 android14-6.1 ffdc7c21c9c5 be5d1971 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/11/13 09:59 android14-6.1 ffdc7c21c9c5 26b2fee0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/11/13 08:51 android14-6.1 ffdc7c21c9c5 26b2fee0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/11/13 07:43 android14-6.1 ffdc7c21c9c5 26b2fee0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/11/11 21:22 android14-6.1 73a29528cf4d e56a968c .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/11/11 21:12 android14-6.1 73a29528cf4d e56a968c .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/11/11 15:05 android14-6.1 73a29528cf4d e56a968c .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/11/11 12:16 android14-6.1 73a29528cf4d e56a968c .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/11/11 10:22 android14-6.1 73a29528cf4d d3056657 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/11/11 08:32 android14-6.1 73a29528cf4d d3056657 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/11/11 06:31 android14-6.1 73a29528cf4d d3056657 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/11/11 04:45 android14-6.1 1ff6da44b069 d3056657 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/11/11 02:35 android14-6.1 1ff6da44b069 d3056657 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/11/11 00:45 android14-6.1 1ff6da44b069 d3056657 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/11/11 00:45 android14-6.1 1ff6da44b069 d3056657 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/11/10 16:51 android14-6.1 1ff6da44b069 d3056657 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/11/10 10:49 android14-6.1 94d09a92ed2f 70ec0380 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/11/10 09:13 android14-6.1 94d09a92ed2f 70ec0380 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/11/10 07:09 android14-6.1 94d09a92ed2f 70ec0380 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/11/10 05:50 android14-6.1 94d09a92ed2f 70ec0380 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/11/10 04:29 android14-6.1 94d09a92ed2f 70ec0380 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/11/10 01:15 android14-6.1 d25dfc5a9ed6 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/11/09 18:15 android14-6.1 d25dfc5a9ed6 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 SYZFAIL: tun: can't open /dev/net/tun
2026/11/09 17:02 android14-6.1 d25dfc5a9ed6 5cecaf1f .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.