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

Status: premoderation: reported syz repro on 2023/11/10 07:03
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+18c8c4362ab4d787f710@syzkaller.appspotmail.com
First crash: 1079d, last: 22h47m
Fix bisection: failed (error log, bisect log)
  
▶ ▼ Bug presence (2)
Date Name Commit Repro Result
2023/11/10 lts (merge base) 12952a23a5da syz [report] SYZFAIL: tun: can't open /dev/net/tun
2023/11/10 upstream (ToT) 89cdf9d55601 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 19 16h26m 375d 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 16 3d07h 351d 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 1812d 1812d 0/2 auto-closed as invalid on 2022/02/05 06:28
android-5-10 SYZFAIL: tun: can't open /dev/net/tun (2) -1 syz error error 565 now 1699d 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 527d 1888d 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 1699d 1841d 0/1 upstream: reported syz repro on 2021/10/09 05:44
android-6-1 SYZFAIL: tun: can't open /dev/net/tun origin:upstream -1 syz error error 392 4h15m 1079d 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 694d 694d 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 1994d 1994d 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 572 47m 480d 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 754d 1058d 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 13 3d02h 349d 0/2 upstream: reported syz repro on 2025/11/09 04:42
▶ ▼ Last patch testing requests (7)
Created Duration User Patch Repo Result
2026/09/04 07:47 6m retest repro android13-5.15-lts report job log log
2026/08/09 15:18 13m retest repro android13-5.15-lts report log
2026/08/09 15:18 14m retest repro android13-5.15-lts report log
2026/08/09 15:18 15m retest repro android13-5.15-lts report log
2026/08/09 15:18 14m retest repro android13-5.15-lts report log
2026/08/09 15:18 12m retest repro android13-5.15-lts report log
2026/07/24 04:43 13m retest repro android13-5.15-lts log
▶ ▼ Fix bisection attempts (7)
Created Duration User Patch Repo Result
2026/05/27 08:11 18m bisect fix android13-5.15-lts error job log
2025/04/15 01:56 37m bisect fix android13-5.15-lts OK (0) job log log
2025/02/16 16:15 42m bisect fix android13-5.15-lts OK (0) job log log
2025/01/16 00:57 1h00m bisect fix android13-5.15-lts OK (0) job log log
2024/03/19 22:37 52m bisect fix android13-5.15-lts OK (0) job log log
2024/01/26 07:10 1h06m bisect fix android13-5.15-lts OK (0) job log log
2023/12/26 03:38 49m bisect fix android13-5.15-lts 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 (496):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/02/24 06:42 android13-5.15-lts 13d6d33696ef 41d2fa6a .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/02/21 06:49 android13-5.15-lts 13d6d33696ef 6e7b5511 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/02/09 13:58 android13-5.15-lts b5b90d209864 df949cd9 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/02/08 04:11 android13-5.15-lts b5b90d209864 4c131dc4 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/02/03 17:18 android13-5.15-lts 7e1070528954 6df4c87a .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/02/03 06:39 android13-5.15-lts 7e1070528954 d78927dd .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/01/06 06:47 android13-5.15-lts 050dc55b0457 d6526ea3 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2025/12/09 09:56 android13-5.15-lts 057fdbf6d3c7 d6526ea3 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2025/12/05 17:28 android13-5.15-lts 057fdbf6d3c7 d6526ea3 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2025/12/02 02:55 android13-5.15-lts 057fdbf6d3c7 d6526ea3 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2025/11/20 06:37 android13-5.15-lts 8a8f52308945 26ee5237 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2025/11/07 15:13 android13-5.15-lts 8a8f52308945 4e1406b4 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf SYZFAIL: tun: can't open /dev/net/tun
2023/11/10 07:02 android13-5.15-lts 61cfd264993d 56230772 .config console log report syz [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/10/23 18:03 android13-5.15-lts c4cfc3ce1d26 d566bfda .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/10/23 16:25 android13-5.15-lts c4cfc3ce1d26 d566bfda .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/10/23 05:37 android13-5.15-lts c4cfc3ce1d26 d566bfda .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/10/23 01:54 android13-5.15-lts c4cfc3ce1d26 b55fad29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/10/23 00:17 android13-5.15-lts c4cfc3ce1d26 b55fad29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/10/22 22:59 android13-5.15-lts c4cfc3ce1d26 b55fad29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/10/22 21:33 android13-5.15-lts c4cfc3ce1d26 b55fad29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/10/22 18:56 android13-5.15-lts c4cfc3ce1d26 b55fad29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/10/22 15:37 android13-5.15-lts c4cfc3ce1d26 b55fad29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/10/22 15:37 android13-5.15-lts c4cfc3ce1d26 b55fad29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/10/22 13:17 android13-5.15-lts c4cfc3ce1d26 b55fad29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/10/22 11:36 android13-5.15-lts c4cfc3ce1d26 b55fad29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/10/22 10:14 android13-5.15-lts 86eefba284ca 4ba27f85 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/10/22 08:49 android13-5.15-lts 86eefba284ca 4ba27f85 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/10/22 07:48 android13-5.15-lts 86eefba284ca 4ba27f85 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/10/22 04:38 android13-5.15-lts 86eefba284ca 4ba27f85 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/10/22 01:43 android13-5.15-lts 86eefba284ca 4ba27f85 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/10/21 22:26 android13-5.15-lts 86eefba284ca 4ba27f85 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/10/21 20:41 android13-5.15-lts 86eefba284ca 4ba27f85 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/10/21 20:40 android13-5.15-lts 86eefba284ca 4ba27f85 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/10/21 19:04 android13-5.15-lts 86eefba284ca 61c200c7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/10/21 13:54 android13-5.15-lts 86eefba284ca 61c200c7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/10/20 21:03 android13-5.15-lts 86eefba284ca df8746fb .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/10/20 15:21 android13-5.15-lts 86eefba284ca df8746fb .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/10/19 22:00 android13-5.15-lts 86eefba284ca 72cdc28d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/10/19 15:53 android13-5.15-lts ff23d765b06f 72cdc28d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/10/19 14:13 android13-5.15-lts ff23d765b06f 432c0077 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/10/19 12:48 android13-5.15-lts ff23d765b06f 432c0077 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/10/19 11:47 android13-5.15-lts ff23d765b06f 432c0077 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/10/19 08:45 android13-5.15-lts ff23d765b06f 432c0077 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/10/19 05:55 android13-5.15-lts ff23d765b06f 432c0077 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/10/19 05:32 android13-5.15-lts ff23d765b06f 432c0077 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/10/19 01:49 android13-5.15-lts ff23d765b06f 432c0077 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/10/18 22:51 android13-5.15-lts ff23d765b06f 432c0077 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/10/18 21:20 android13-5.15-lts ff23d765b06f 432c0077 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/10/18 18:53 android13-5.15-lts ff23d765b06f 432c0077 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/10/18 17:09 android13-5.15-lts ff23d765b06f 432c0077 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/10/18 16:09 android13-5.15-lts ff23d765b06f 432c0077 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/10/18 13:52 android13-5.15-lts ff23d765b06f 432c0077 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/10/18 11:35 android13-5.15-lts ff23d765b06f 432c0077 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/10/18 09:51 android13-5.15-lts ff23d765b06f 432c0077 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/10/18 08:33 android13-5.15-lts ff23d765b06f 432c0077 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/10/18 05:24 android13-5.15-lts ff23d765b06f 432c0077 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/09/26 02:09 android13-5.15-lts 81cf8006a12f f281d9d2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/01/08 20:50 android13-5.15-lts 050dc55b0457 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf SYZFAIL: tun: can't open /dev/net/tun
* Struck through repros no longer work on HEAD.