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: 1101d, last: 8h33m
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 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-5-10 SYZFAIL: tun: can't open /dev/net/tun (2) -1 syz error error 1397 1h07m 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
android-6-1 SYZFAIL: tun: can't open /dev/net/tun origin:upstream -1 syz error error 776 16m 1102d 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 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 44m 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 (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 (886):
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
2026/11/15 14:32 android13-5.15-lts f181319b13ed 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/11/15 12:55 android13-5.15-lts f181319b13ed 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/11/15 09:18 android13-5.15-lts f181319b13ed 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/11/15 04:55 android13-5.15-lts f181319b13ed 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/11/15 01:59 android13-5.15-lts f181319b13ed 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/11/15 00:04 android13-5.15-lts f181319b13ed 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/11/14 18:11 android13-5.15-lts f181319b13ed 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/11/14 15:59 android13-5.15-lts f181319b13ed 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/11/14 13:31 android13-5.15-lts f181319b13ed 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/11/14 10:04 android13-5.15-lts f181319b13ed 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/11/14 08:22 android13-5.15-lts f181319b13ed 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/11/14 06:38 android13-5.15-lts f181319b13ed 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/11/14 01:20 android13-5.15-lts f181319b13ed 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/11/13 18:41 android13-5.15-lts f181319b13ed be5d1971 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/11/13 16:29 android13-5.15-lts f181319b13ed be5d1971 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/11/13 11:15 android13-5.15-lts f181319b13ed 26b2fee0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/11/13 09:26 android13-5.15-lts f181319b13ed 26b2fee0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/11/13 08:05 android13-5.15-lts f181319b13ed 26b2fee0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/11/13 06:55 android13-5.15-lts f181319b13ed 26b2fee0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/11/13 04:50 android13-5.15-lts f181319b13ed c0087d7f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/11/13 03:48 android13-5.15-lts f181319b13ed c0087d7f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/11/13 01:47 android13-5.15-lts f181319b13ed c0087d7f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/11/13 00:10 android13-5.15-lts f181319b13ed c0087d7f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/11/12 16:59 android13-5.15-lts f181319b13ed c0087d7f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/11/12 10:36 android13-5.15-lts f181319b13ed 8d68b303 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/11/12 05:18 android13-5.15-lts f181319b13ed 8d68b303 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/11/12 00:43 android13-5.15-lts f181319b13ed 8d68b303 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/11/11 19:47 android13-5.15-lts f181319b13ed e56a968c .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/11/11 18:00 android13-5.15-lts f181319b13ed e56a968c .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/11/11 16:58 android13-5.15-lts f181319b13ed e56a968c .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/11/11 13:54 android13-5.15-lts f181319b13ed e56a968c .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/11/11 08:44 android13-5.15-lts 2316d138a3c3 d3056657 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/11/10 17:13 android13-5.15-lts 2316d138a3c3 d3056657 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/11/10 07:12 android13-5.15-lts 2316d138a3c3 70ec0380 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/11/10 04:20 android13-5.15-lts 2316d138a3c3 70ec0380 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/11/10 02:49 android13-5.15-lts 2316d138a3c3 70ec0380 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/11/10 00:23 android13-5.15-lts 2316d138a3c3 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/11/09 21:21 android13-5.15-lts 2316d138a3c3 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/11/09 19:24 android13-5.15-lts 2316d138a3c3 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/11/09 18:13 android13-5.15-lts 2316d138a3c3 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/11/09 17:27 android13-5.15-lts 2316d138a3c3 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/11/09 15:00 android13-5.15-lts 2316d138a3c3 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/11/09 12:48 android13-5.15-lts 2316d138a3c3 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/11/09 07:23 android13-5.15-lts 2316d138a3c3 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2026/11/09 06:12 android13-5.15-lts 2316d138a3c3 5cecaf1f .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.