syzbot

 sign-in | mailing list | source | docs
🐞 Open [111]
🐞 Fixed [23]
🐞 Invalid [343]
≡ Crashes
Kernel Health Bugs/Month Bug Lifetimes Fuzzing
💬 Send us feedback

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: 738d, last: 9d22h
▶ ▼ 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 4 5d21h 34d 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 1 9d19h 9d21h 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 1471d 1471d 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 53 2d19h 1358d 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 186d 1547d 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 1357d 1500d 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 24 9d21h 738d 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 353d 353d 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 1653d 1653d 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 52 5d02h 139d 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 413d 717d 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 1 6d18h 8d08h 0/2 upstream: reported syz repro on 2025/11/09 04:42
▶ ▼ Last patch testing requests (2)
Created Duration User Patch Repo Result
2025/09/10 19:19 11m retest repro android13-5.15-lts report log
2025/06/25 09:38 1h12m retest repro android13-5.15-lts report log
▶ ▼ Fix bisection attempts (6)
Created Duration User Patch Repo Result
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 (16):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
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
2025/10/26 17:11 android13-5.15-lts 1edb21e89ce4 c0460fcd .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2025/10/05 09:32 android13-5.15-lts 2bbc293701f8 49379ee0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2025/08/25 16:10 android13-5.15-lts f32b52534f1d bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2025/06/10 06:51 android13-5.15-lts e678c93d43cc 4826c28e .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2025/04/20 09:54 android13-5.15-lts 8034ec1338e8 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2024/10/25 22:07 android13-5.15-lts 5e4635681cf1 045e728d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf SYZFAIL: tun: can't open /dev/net/tun
2024/09/17 20:11 android13-5.15-lts b92c0d35d015 c673ca06 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf SYZFAIL: tun: can't open /dev/net/tun
2024/08/11 23:18 android13-5.15-lts 70e1a731d986 6f4edef4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2024/07/29 00:05 android13-5.15-lts 4edafe6c0231 46eb10b7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2024/07/23 09:03 android13-5.15-lts 5356d2f17edf 708c10c4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2024/07/21 11:08 android13-5.15-lts db06c48ab67e b88348e9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2024/07/01 09:39 android13-5.15-lts 9044d25b8ff5 757f06b1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2024/06/30 21:03 android13-5.15-lts 9044d25b8ff5 757f06b1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
2024/06/30 08:32 android13-5.15-lts 9044d25b8ff5 757f06b1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: can't open /dev/net/tun
* Struck through repros no longer work on HEAD.