SYZFAIL: tun: can't open /dev/net/tun (2)

Status: premoderation: reported syz repro on 2022/02/27 16:56
Reported-by: syzbot+c020be0a91accb096850@syzkaller.appspotmail.com
First crash: 1711d, last: 13m
Cause bisection: failed (error log, bisect log)
  
Fix bisection: failed (error log, bisect log)
  
▶ ▼ 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 1d02h 386d 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 18 1d15h 362d 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 1823d 1823d 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 776 3h39m 1090d 0/2 premoderation: reported syz repro on 2023/11/10 07:03
android-54 SYZFAIL: tun: can't open /dev/net/tun -1 syz 18 538d 1899d 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 1710d 1852d 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 580 10h18m 1091d 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 706d 706d 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 2006d 2006d 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 907 9m 491d 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 766d 1070d 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 17 3d21h 360d 0/2 upstream: reported syz repro on 2025/11/09 04:42
▶ ▼ Last patch testing requests (10)
Created Duration User Patch Repo Result
2026/08/17 06:25 11m retest repro android13-5.10-lts report job log log
2026/08/17 06:25 28m retest repro android13-5.10-lts report job log log
2026/08/17 06:25 18m retest repro android13-5.10-lts report job log log
2026/08/17 06:25 14m retest repro android13-5.10-lts report job log log
2026/08/17 06:25 6m retest repro android13-5.10-lts report job log log
2026/07/16 04:42 14m retest repro android13-5.10-lts log
2026/07/16 04:42 12m retest repro android13-5.10-lts log
2026/07/16 04:42 18m retest repro android13-5.10-lts log
2026/06/07 01:07 12m retest repro android13-5.10-lts log
2026/06/07 01:07 15m retest repro android13-5.10-lts log
▶ ▼ Fix bisection attempts (7)
Created Duration User Patch Repo Result
2023/02/03 12:08 1m bisect fix android12-5.10-lts error job log
2022/10/29 04:52 16m bisect fix android12-5.10-lts OK (0) job log log
2022/09/09 01:56 15m bisect fix android12-5.10-lts OK (0) job log log
2022/08/09 18:27 19m bisect fix android12-5.10-lts OK (0) job log log
2022/07/10 18:11 16m bisect fix android12-5.10-lts OK (0) job log log
2022/06/10 17:15 15m bisect fix android12-5.10-lts OK (0) job log log
2022/05/11 16:57 17m bisect fix android12-5.10-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=7 req=24 state=3 status=67 (errno 32: Broken pipe)
connection error: failed to recv *flatrpc.ExecutorMessageRawT: EOF

Crashes (941):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/09/25 06:01 android13-5.10-lts 452567d1985b f281d9d2 .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2025/12/28 09:59 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2025/12/25 03:31 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2025/12/18 08:32 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2025/12/17 09:33 android13-5.10-lts e253c52bbdfc d6526ea3 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2025/11/28 13:57 android13-5.10-lts 9286af17ed5f d6526ea3 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2025/11/14 05:10 android13-5.10-lts ab3e1c0dd1ff 07e030de .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2025/11/07 22:21 android13-5.10-lts ab3e1c0dd1ff 4e1406b4 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-10-perf SYZFAIL: tun: can't open /dev/net/tun
2023/11/08 16:44 android13-5.10-lts d30b996835c0 b93f63e8 .config console log report syz [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2022/03/25 21:16 android12-5.10-lts ab2d1d40a128 89bc8608 .config console log report syz ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2022/02/27 16:55 android12-5.10-lts e1b86e7f5cbb 45a13a73 .config console log report syz ci2-android-5-10-perf SYZFAIL: tun: can't open /dev/net/tun
2026/11/05 02:13 android13-5.10-lts f61a392235e0 73438ed0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/05 00:48 android13-5.10-lts f61a392235e0 73438ed0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/04 23:28 android13-5.10-lts f61a392235e0 73438ed0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/04 21:16 android13-5.10-lts f61a392235e0 73438ed0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/04 20:09 android13-5.10-lts f61a392235e0 73438ed0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/04 18:19 android13-5.10-lts f61a392235e0 73438ed0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/04 17:40 android13-5.10-lts f61a392235e0 73438ed0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/04 16:02 android13-5.10-lts f61a392235e0 73438ed0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/04 12:59 android13-5.10-lts f61a392235e0 5af5b6c6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/04 09:47 android13-5.10-lts f61a392235e0 5af5b6c6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/04 07:01 android13-5.10-lts f61a392235e0 5af5b6c6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/04 05:29 android13-5.10-lts f61a392235e0 5af5b6c6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/04 05:29 android13-5.10-lts f61a392235e0 5af5b6c6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/04 03:00 android13-5.10-lts f61a392235e0 5af5b6c6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/04 01:51 android13-5.10-lts f61a392235e0 e2d35131 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/04 00:07 android13-5.10-lts f61a392235e0 e2d35131 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/03 22:37 android13-5.10-lts f61a392235e0 e2d35131 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/03 21:02 android13-5.10-lts f61a392235e0 e2d35131 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/03 19:07 android13-5.10-lts f61a392235e0 e2d35131 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/03 17:52 android13-5.10-lts f61a392235e0 e2d35131 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/03 17:02 android13-5.10-lts f61a392235e0 e2d35131 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/03 15:45 android13-5.10-lts f61a392235e0 e2d35131 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/03 13:59 android13-5.10-lts f61a392235e0 e2d35131 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/03 12:20 android13-5.10-lts f61a392235e0 e2d35131 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/03 09:49 android13-5.10-lts f61a392235e0 6969b601 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/03 08:16 android13-5.10-lts f61a392235e0 6969b601 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/03 06:56 android13-5.10-lts f61a392235e0 6969b601 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/03 05:01 android13-5.10-lts f61a392235e0 6969b601 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/03 02:37 android13-5.10-lts f61a392235e0 6969b601 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/03 01:20 android13-5.10-lts f61a392235e0 6969b601 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/02 23:40 android13-5.10-lts f61a392235e0 6969b601 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/02 21:24 android13-5.10-lts f61a392235e0 6969b601 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/02 19:27 android13-5.10-lts f61a392235e0 6969b601 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/02 17:39 android13-5.10-lts f61a392235e0 6969b601 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/02 16:53 android13-5.10-lts f61a392235e0 6969b601 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/02 14:24 android13-5.10-lts f61a392235e0 6969b601 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/02 12:30 android13-5.10-lts f61a392235e0 6969b601 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/02 10:58 android13-5.10-lts f61a392235e0 6969b601 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/02 09:07 android13-5.10-lts f61a392235e0 25a0ae84 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/02 07:31 android13-5.10-lts f61a392235e0 25a0ae84 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/02 06:30 android13-5.10-lts f61a392235e0 25a0ae84 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/02 05:47 android13-5.10-lts f61a392235e0 25a0ae84 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/10/07 04:17 android13-5.10-lts 207de56dd089 f7710056 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/01/30 19:17 android13-5.10-lts 186f761c519d ae7dc18c .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10-perf SYZFAIL: tun: can't open /dev/net/tun
* Struck through repros no longer work on HEAD.