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

Status: premoderation: reported syz repro on 2025/07/01 04:36
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+dfc3a9290f8ae03e173e@syzkaller.appspotmail.com
First crash: 482d, last: 1h06m
▶ ▼ Bug presence (2)
Date Name Commit Repro Result
2025/11/09 lts (merge base) 2b2cbdcede38 syz [report] SYZFAIL: tun: can't open /dev/net/tun
2025/11/09 upstream (ToT) 439fc29dfd3b 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 2d21h 377d 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 5d12h 353d 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 1814d 1814d 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 571 45m 1081d 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 637 19m 1702d 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 529d 1890d 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 1701d 1843d 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 471 2h10m 1082d 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 697d 697d 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 1997d 1997d 0/29 auto-closed as invalid on 2021/08/06 17:44
linux-6.1 SYZFAIL: tun: can't open /dev/net/tun origin:upstream -1 syz done 1 756d 1061d 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 14 10h33m 351d 0/2 upstream: reported syz repro on 2025/11/09 04:42
▶ ▼ Last patch testing requests (10)
Created Duration User Patch Repo Result
2026/08/05 21:01 16m retest repro android16-6.12 report log
2026/08/05 21:01 20m retest repro android16-6.12 report log
2026/08/05 21:01 17m retest repro android16-6.12 report log
2026/04/21 10:44 1h13m retest repro android16-6.12 report log
2026/04/21 10:44 1h12m retest repro android16-6.12 report log
2026/04/21 10:44 18m retest repro android16-6.12 report log
2026/02/10 02:46 9m retest repro android16-6.12 report log
2026/02/10 02:46 9m retest repro android16-6.12 report log
2026/02/10 02:46 9m retest repro android16-6.12 report log
2025/12/01 18:16 6m retest repro android16-6.12 error

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=1 req=2371 state=3 status=67 (errno 32: Broken pipe)
connection error: failed to recv *flatrpc.ExecutorMessageRawT: read tcp 127.0.0.1:42765->127.0.0.1:33432: read: connection reset by peer

Crashes (617):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/10/26 04:34 android16-6.12 8667f8e26c47 1d9ca40b .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/23 21:33 android16-6.12 2231183cf51f 1d9ca40b .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/17 17:03 android16-6.12 49f96790cc76 432c0077 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/08 06:59 android16-6.12 c7ad8c94d619 4f6a9fcf .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/09/21 19:53 android16-6.12 3b5131b275d2 853b104b .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2025/11/17 17:41 android16-6.12 0d6730ee6542 ef766cd7 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2025/11/08 21:27 android16-6.12 0d6730ee6542 4e1406b4 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2025/11/07 17:02 android16-6.12 0d6730ee6542 4e1406b4 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/26 20:19 android16-6.12 e9c13b0731b0 168cb7a2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/26 19:02 android16-6.12 e9c13b0731b0 168cb7a2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/26 17:59 android16-6.12 e9c13b0731b0 168cb7a2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/26 15:51 android16-6.12 e9c13b0731b0 168cb7a2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/26 12:47 android16-6.12 8667f8e26c47 168cb7a2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/26 10:22 android16-6.12 8667f8e26c47 1d9ca40b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/26 05:40 android16-6.12 8667f8e26c47 1d9ca40b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/26 03:36 android16-6.12 8667f8e26c47 1d9ca40b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/26 01:26 android16-6.12 8667f8e26c47 1d9ca40b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/25 22:12 android16-6.12 8667f8e26c47 1d9ca40b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/25 22:12 android16-6.12 8667f8e26c47 1d9ca40b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/25 12:20 android16-6.12 8667f8e26c47 1d9ca40b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/25 09:30 android16-6.12 32521e28daaa 1d9ca40b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/25 05:18 android16-6.12 32521e28daaa 1d9ca40b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/25 02:26 android16-6.12 32521e28daaa 1d9ca40b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/24 22:42 android16-6.12 32521e28daaa 1d9ca40b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/24 18:25 android16-6.12 32521e28daaa 1d9ca40b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/24 16:03 android16-6.12 32521e28daaa 1d9ca40b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/24 05:47 android16-6.12 2231183cf51f 1d9ca40b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/23 19:42 android16-6.12 2231183cf51f 1d9ca40b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/23 18:12 android16-6.12 2231183cf51f d566bfda .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/23 17:12 android16-6.12 d3205ab6c8c7 d566bfda .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/23 15:06 android16-6.12 d3205ab6c8c7 d566bfda .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/23 12:22 android16-6.12 d3205ab6c8c7 d566bfda .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/23 02:40 android16-6.12 d3205ab6c8c7 b55fad29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/22 12:40 android16-6.12 28f05768264f b55fad29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/22 07:39 android16-6.12 c10c8ec18bd2 4ba27f85 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/21 18:16 android16-6.12 cd41470055b0 61c200c7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/21 15:39 android16-6.12 cd41470055b0 61c200c7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/21 14:14 android16-6.12 cd41470055b0 61c200c7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/21 13:11 android16-6.12 cd41470055b0 61c200c7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/21 10:36 android16-6.12 cd41470055b0 61c200c7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/21 08:41 android16-6.12 cd41470055b0 61c200c7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/21 07:28 android16-6.12 cd41470055b0 61c200c7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/21 06:38 android16-6.12 cd41470055b0 61c200c7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/21 05:06 android16-6.12 cd41470055b0 df8746fb .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/21 02:31 android16-6.12 cd41470055b0 df8746fb .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/21 00:56 android16-6.12 cd41470055b0 df8746fb .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/20 22:29 android16-6.12 3e51fbb70e49 df8746fb .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/20 18:48 android16-6.12 3e51fbb70e49 df8746fb .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/20 16:14 android16-6.12 3e51fbb70e49 df8746fb .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/20 15:03 android16-6.12 3e51fbb70e49 df8746fb .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/20 13:26 android16-6.12 3e51fbb70e49 df8746fb .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/20 11:14 android16-6.12 3e51fbb70e49 df8746fb .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/20 09:51 android16-6.12 3e51fbb70e49 72cdc28d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/20 08:20 android16-6.12 3e51fbb70e49 72cdc28d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/20 05:06 android16-6.12 2b3a1a14ec95 72cdc28d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
* Struck through repros no longer work on HEAD.