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: 1722d, last: 1h20m
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 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-5-15 SYZFAIL: tun: can't open /dev/net/tun origin:upstream -1 syz error 887 now 1101d 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 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 29m 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 57m 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 (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 (1397):
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
2026/11/15 21:24 android13-5.10-lts c73351b2e985 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/15 19:30 android13-5.10-lts c73351b2e985 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/15 18:30 android13-5.10-lts c73351b2e985 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/15 16:49 android13-5.10-lts c73351b2e985 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/15 16:37 android13-5.10-lts c73351b2e985 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/15 15:12 android13-5.10-lts c73351b2e985 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/15 14:01 android13-5.10-lts c73351b2e985 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/15 12:17 android13-5.10-lts c73351b2e985 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/15 10:58 android13-5.10-lts c73351b2e985 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/15 09:49 android13-5.10-lts c73351b2e985 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/15 07:41 android13-5.10-lts c73351b2e985 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/15 06:39 android13-5.10-lts c73351b2e985 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/15 05:25 android13-5.10-lts c73351b2e985 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/15 03:41 android13-5.10-lts c73351b2e985 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/15 01:20 android13-5.10-lts c73351b2e985 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/14 23:55 android13-5.10-lts c73351b2e985 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/14 22:44 android13-5.10-lts c73351b2e985 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/14 17:04 android13-5.10-lts c73351b2e985 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/14 16:16 android13-5.10-lts c73351b2e985 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/14 14:41 android13-5.10-lts c73351b2e985 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/14 12:45 android13-5.10-lts c73351b2e985 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/14 11:32 android13-5.10-lts c73351b2e985 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/14 10:11 android13-5.10-lts c73351b2e985 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/14 09:04 android13-5.10-lts c73351b2e985 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/14 07:55 android13-5.10-lts c73351b2e985 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/14 06:33 android13-5.10-lts c73351b2e985 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/14 04:32 android13-5.10-lts c73351b2e985 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/14 00:12 android13-5.10-lts c73351b2e985 819ebe34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/13 23:10 android13-5.10-lts c73351b2e985 be5d1971 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/13 21:52 android13-5.10-lts c73351b2e985 be5d1971 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/13 20:45 android13-5.10-lts c73351b2e985 be5d1971 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/13 19:34 android13-5.10-lts c73351b2e985 be5d1971 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/13 17:13 android13-5.10-lts c73351b2e985 be5d1971 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/13 15:38 android13-5.10-lts c73351b2e985 be5d1971 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/13 14:25 android13-5.10-lts c73351b2e985 be5d1971 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/13 13:07 android13-5.10-lts c73351b2e985 be5d1971 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/13 11:42 android13-5.10-lts c73351b2e985 be5d1971 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/13 10:30 android13-5.10-lts c73351b2e985 26b2fee0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/13 08:41 android13-5.10-lts c73351b2e985 26b2fee0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/13 07:14 android13-5.10-lts c73351b2e985 26b2fee0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/13 05:52 android13-5.10-lts c73351b2e985 c0087d7f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/13 04:49 android13-5.10-lts c73351b2e985 c0087d7f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/13 03:03 android13-5.10-lts c73351b2e985 c0087d7f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/13 02:20 android13-5.10-lts c73351b2e985 c0087d7f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 SYZFAIL: tun: can't open /dev/net/tun
2026/11/13 01:08 android13-5.10-lts c73351b2e985 c0087d7f .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.