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: 463d, last: 19h54m
▶ ▼ 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 14 2d02h 358d 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 7 3d17h 333d 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 1795d 1795d 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 324 1h03m 1062d 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 230 2h14m 1682d 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 509d 1870d 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 1681d 1824d 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 182 3h20m 1062d 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 677d 677d 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 1977d 1977d 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 737d 1041d 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 9 1d16h 332d 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=2 req=617 state=3 status=67 (errno 32: Broken pipe)
connection error: failed to recv *flatrpc.ExecutorMessageRawT: EOF

Crashes (231):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
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
2026/10/06 11:45 android16-6.12 31493cc8d965 f7710056 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/06 10:39 android16-6.12 31493cc8d965 f7710056 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/06 09:28 android16-6.12 31493cc8d965 f7710056 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/06 06:58 android16-6.12 31493cc8d965 f7710056 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/06 06:57 android16-6.12 31493cc8d965 f7710056 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/05 02:25 android16-6.12 3a7d1771d492 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/04 23:16 android16-6.12 3a7d1771d492 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/10/04 07:25 android16-6.12 3a7d1771d492 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/09/30 23:52 android16-6.12 dfd0de11e80f 38f7f0d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/09/30 22:41 android16-6.12 dfd0de11e80f 38f7f0d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/09/30 20:24 android16-6.12 dfd0de11e80f 38f7f0d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/09/29 11:57 android16-6.12 da245f6c05a1 7bf4ea23 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/09/29 08:31 android16-6.12 da245f6c05a1 7bf4ea23 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/09/29 06:00 android16-6.12 da245f6c05a1 7bf4ea23 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/09/29 01:37 android16-6.12 da245f6c05a1 7bf4ea23 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/09/28 22:40 android16-6.12 da245f6c05a1 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/09/28 22:02 android16-6.12 da245f6c05a1 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/09/28 19:26 android16-6.12 516976327553 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/09/28 18:17 android16-6.12 516976327553 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/09/28 16:57 android16-6.12 516976327553 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/09/28 15:41 android16-6.12 516976327553 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/09/28 13:59 android16-6.12 516976327553 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/09/28 12:29 android16-6.12 516976327553 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/09/28 11:13 android16-6.12 516976327553 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/09/28 10:00 android16-6.12 516976327553 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/09/28 09:57 android16-6.12 516976327553 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/09/28 08:56 android16-6.12 516976327553 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/09/28 07:47 android16-6.12 516976327553 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/09/28 04:40 android16-6.12 516976327553 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/09/28 02:55 android16-6.12 516976327553 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/09/28 01:15 android16-6.12 516976327553 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/09/27 23:58 android16-6.12 516976327553 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/09/27 22:02 android16-6.12 516976327553 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/09/27 20:12 android16-6.12 516976327553 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/09/27 19:01 android16-6.12 516976327553 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/09/27 17:49 android16-6.12 516976327553 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/09/27 17:43 android16-6.12 516976327553 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/09/27 16:05 android16-6.12 516976327553 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/09/27 14:47 android16-6.12 516976327553 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/09/27 13:20 android16-6.12 516976327553 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/09/27 11:46 android16-6.12 516976327553 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/09/27 10:34 android16-6.12 516976327553 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/09/27 09:14 android16-6.12 516976327553 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/09/27 07:53 android16-6.12 516976327553 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/09/27 05:57 android16-6.12 516976327553 a3c7249d .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.