syzbot

 sign-in | mailing list | source | docs
🐞 Open [119]
🐞 Fixed [23]
🐞 Invalid [357]
≡ Crashes
Kernel Health Bugs/Month Bug Lifetimes Fuzzing
💬 Send us feedback

SYZFAIL: tun: ioctl(TUNSETIFF) failed

Status: premoderation: reported syz repro on 2024/06/30 02:15
Bug presence: origin:lts
[Documentation on labels]
Reported-by: syzbot+66ffb849ebfdc380ec94@syzkaller.appspotmail.com
First crash: 598d, last: 10h49m
▶ ▼ Bug presence (2)
Date Name Commit Repro Result
2026/01/15 lts (merge base) 68efe5a6c16a syz [report] SYZFAIL: tun: ioctl(TUNSETIFF) failed
2026/01/15 upstream (ToT) 944aacb68baf syz Didn't crash
▶ ▼ Similar bugs (14)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-54 SYZFAIL: tun: ioctl(TUNSETIFF) failed -1 1 1556d 1556d 0/2 closed as invalid on 2021/11/16 09:11
linux-5.15 SYZFAIL: tun: ioctl(TUNSETIFF) failed -1 10 241d 472d 0/3 auto-obsoleted due to no activity on 2025/09/30 19:38
android-6-12 SYZFAIL: tun: ioctl(TUNSETIFF) failed -1 112 98d 244d 0/1 auto-obsoleted due to no activity on 2026/01/01 11:58
android-54 SYZFAIL: tun: ioctl(TUNSETIFF) failed (4) -1 75 272d 385d 0/2 auto-obsoleted due to no activity on 2025/07/11 21:09
linux-6.6 SYZFAIL: tun: ioctl(TUNSETIFF) failed origin:lts-only -1 syz error 8 36d 135d 0/2 upstream: reported syz repro on 2025/10/06 05:00
linux-5.15 SYZFAIL: tun: ioctl(TUNSETIFF) failed (2) origin:lts-only -1 syz error 11 3d09h 131d 0/3 upstream: reported syz repro on 2025/10/11 00:29
android-54 SYZFAIL: tun: ioctl(TUNSETIFF) failed (3) -1 3 599d 603d 0/2 auto-obsoleted due to no activity on 2024/09/27 11:34
android-5-10 SYZFAIL: tun: ioctl(TUNSETIFF) failed -1 7 1412d 1571d 0/2 auto-closed as invalid on 2022/07/07 13:54
android-6-1 SYZFAIL: tun: ioctl(TUNSETIFF) failed origin:downstream -1 syz 135 1d08h 591d 0/2 premoderation: reported syz repro on 2024/07/07 21:01
android-54 SYZFAIL: tun: ioctl(TUNSETIFF) failed (2) -1 3 1415d 1433d 0/2 auto-closed as invalid on 2022/08/03 05:52
linux-6.1 SYZFAIL: tun: ioctl(TUNSETIFF) failed (2) origin:upstream -1 syz 27 15d 332d 0/3 upstream: reported syz repro on 2025/03/23 07:07
android-6-12 SYZFAIL: tun: ioctl(TUNSETIFF) failed (2) -1 5 7h21m 26d 0/1 premoderation: reported on 2026/01/23 14:07
android-5-10 SYZFAIL: tun: ioctl(TUNSETIFF) failed (2) -1 syz 1124 21h28m 603d 0/2 premoderation: reported syz repro on 2024/06/25 10:31
linux-6.1 SYZFAIL: tun: ioctl(TUNSETIFF) failed -1 1 437d 437d 0/3 auto-obsoleted due to no activity on 2025/03/18 21:55

Sample crash report:
SYZFAIL: tun: ioctl(TUNSETIFF) failed
 (errno 25: Inappropriate ioctl for device)
loop exited with status 67
SYZFAIL: tun: ioctl(TUNSETIFF) failed
 (errno 25: Inappropriate ioctl for device)
loop exited with status 67
SYZFAIL: tun: ioctl(TUNSETIFF) failed
 (errno 25: Inappropriate ioctl for device)
loop exited with status 67
SYZFAIL: tun: ioctl(TUNSETIFF) failed
 (errno 25: Inappropriate ioctl for device)
loop exited with status 67
SYZFAIL: tun: ioctl(TUNSETIFF) failed
 (errno 25: Inappropriate ioctl for device)
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: ioctl(TUNSETIFF) failed
 (errno 25: Inappropriate ioctl for device)
loop exited with status 67
SYZFAIL: tun: ioctl(TUNSETIFF) failed
 (errno 25: Inappropriate ioctl for device)
loop exited with status 67
SYZFAIL: tun: ioctl(TUNSETIFF) failed
 (errno 25: Inappropriate ioctl for device)
loop exited with status 67
SYZFAIL: tun: ioctl(TUNSETIFF) failed
 (errno 25: Inappropriate ioctl for device)
loop exited with status 67
SYZFAIL: tun: ioctl(TUNSETIFF) failed
 (errno 25: Inappropriate ioctl for device)
loop exited with status 67
SYZFAIL: tun: ioctl(TUNSETIFF) failed
 (errno 25: Inappropriate ioctl for device)
loop exited with status 67
SYZFAIL: tun: ioctl(TUNSETIFF) failed
 (errno 25: Inappropriate ioctl for device)
loop exited with status 67
SYZFAIL: tun: ioctl(TUNSETIFF) failed
 (errno 25: Inappropriate ioctl for device)
loop exited with status 67
SYZFAIL: tun: ioctl(TUNSETIFF) failed
 (errno 25: Inappropriate ioctl for device)
loop exited with status 67
SYZFAIL: tun: ioctl(TUNSETIFF) failed
 (errno 25: Inappropriate ioctl for device)
loop exited with status 67
SYZFAIL: tun: ioctl(TUNSETIFF) failed
 (errno 25: Inappropriate ioctl for device)
loop exited with status 67
SYZFAIL: tun: ioctl(TUNSETIFF) failed
 (errno 25: Inappropriate ioctl for device)
loop exited with status 67
SYZFAIL: tun: ioctl(TUNSETIFF) failed
 (errno 25: Inappropriate ioctl for device)
loop exited with status 67
SYZFAIL: tun: ioctl(TUNSETIFF) failed
 (errno 25: Inappropriate ioctl for device)
loop exited with status 67
SYZFAIL: tun: ioctl(TUNSETIFF) failed
 (errno 25: Inappropriate ioctl for device)
loop exited with status 67
SYZFAIL: repeatedly failed to execute the program
proc=3 req=2934 state=3 status=67 (errno 32: Broken pipe)
connection error: failed to recv *flatrpc.ExecutorMessageRawT: read tcp 127.0.0.1:39265->127.0.0.1:38582: read: connection reset by peer

Crashes (166):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/02/12 22:41 android13-5.15-lts 303755dd03b7 504cb1bf .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: ioctl(TUNSETIFF) failed
2026/01/12 08:44 android13-5.15-lts 050dc55b0457 d6526ea3 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf SYZFAIL: tun: ioctl(TUNSETIFF) failed
2026/02/18 15:20 android13-5.15-lts 13d6d33696ef 39751c21 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: ioctl(TUNSETIFF) failed
2026/02/18 11:22 android13-5.15-lts 13d6d33696ef 39751c21 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: ioctl(TUNSETIFF) failed
2026/02/18 07:55 android13-5.15-lts 13d6d33696ef 39751c21 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf SYZFAIL: tun: ioctl(TUNSETIFF) failed
2026/02/17 10:00 android13-5.15-lts 13d6d33696ef e439b951 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: ioctl(TUNSETIFF) failed
2026/02/15 07:26 android13-5.15-lts 13d6d33696ef 1e62d198 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf SYZFAIL: tun: ioctl(TUNSETIFF) failed
2026/02/15 00:27 android13-5.15-lts 13d6d33696ef 1e62d198 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: ioctl(TUNSETIFF) failed
2026/02/12 06:52 android13-5.15-lts c3393955a6be 76a109e2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf SYZFAIL: tun: ioctl(TUNSETIFF) failed
2026/02/08 19:17 android13-5.15-lts b5b90d209864 4c131dc4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf SYZFAIL: tun: ioctl(TUNSETIFF) failed
2026/02/06 07:37 android13-5.15-lts 4115628a19d7 f03c4191 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf SYZFAIL: tun: ioctl(TUNSETIFF) failed
2026/02/03 10:24 android13-5.15-lts 7e1070528954 6df4c87a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf SYZFAIL: tun: ioctl(TUNSETIFF) failed
2026/02/01 21:49 android13-5.15-lts 7e1070528954 6b8752f2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf SYZFAIL: tun: ioctl(TUNSETIFF) failed
2026/01/31 18:33 android13-5.15-lts 7e1070528954 afc0c4d4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf SYZFAIL: tun: ioctl(TUNSETIFF) failed
2026/01/29 21:01 android13-5.15-lts 7e1070528954 aeb6fdd5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf SYZFAIL: tun: ioctl(TUNSETIFF) failed
2026/01/29 03:56 android13-5.15-lts 7e1070528954 0adc945e .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf SYZFAIL: tun: ioctl(TUNSETIFF) failed
2026/01/26 13:44 android13-5.15-lts 00b50d06692d a4c52dd6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf SYZFAIL: tun: ioctl(TUNSETIFF) failed
2026/01/26 09:23 android13-5.15-lts 00b50d06692d 55756628 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf SYZFAIL: tun: ioctl(TUNSETIFF) failed
2026/01/25 18:28 android13-5.15-lts 00b50d06692d 40acda8a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf SYZFAIL: tun: ioctl(TUNSETIFF) failed
2026/01/24 09:30 android13-5.15-lts 00b50d06692d 4f25b9b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf SYZFAIL: tun: ioctl(TUNSETIFF) failed
2026/01/23 08:36 android13-5.15-lts 00b50d06692d 82c9c083 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: ioctl(TUNSETIFF) failed
2026/01/23 02:51 android13-5.15-lts 00b50d06692d 82c9c083 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf SYZFAIL: tun: ioctl(TUNSETIFF) failed
2026/01/22 20:23 android13-5.15-lts 00b50d06692d 82c9c083 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf SYZFAIL: tun: ioctl(TUNSETIFF) failed
2026/01/18 23:46 android13-5.15-lts 050dc55b0457 20d37d28 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf SYZFAIL: tun: ioctl(TUNSETIFF) failed
2026/01/18 08:37 android13-5.15-lts 050dc55b0457 20d37d28 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf SYZFAIL: tun: ioctl(TUNSETIFF) failed
2026/01/11 20:22 android13-5.15-lts 050dc55b0457 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf SYZFAIL: tun: ioctl(TUNSETIFF) failed
2026/01/11 02:15 android13-5.15-lts 050dc55b0457 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf SYZFAIL: tun: ioctl(TUNSETIFF) failed
2026/01/09 18:53 android13-5.15-lts 050dc55b0457 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: ioctl(TUNSETIFF) failed
2026/01/07 03:28 android13-5.15-lts 050dc55b0457 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf SYZFAIL: tun: ioctl(TUNSETIFF) failed
2026/01/03 17:12 android13-5.15-lts 050dc55b0457 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf SYZFAIL: tun: ioctl(TUNSETIFF) failed
2026/01/03 12:24 android13-5.15-lts 050dc55b0457 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: ioctl(TUNSETIFF) failed
2026/01/02 20:37 android13-5.15-lts 050dc55b0457 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf SYZFAIL: tun: ioctl(TUNSETIFF) failed
2026/01/01 23:23 android13-5.15-lts 050dc55b0457 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf SYZFAIL: tun: ioctl(TUNSETIFF) failed
2025/12/31 16:56 android13-5.15-lts 050dc55b0457 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: ioctl(TUNSETIFF) failed
2025/12/24 00:50 android13-5.15-lts 050dc55b0457 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf SYZFAIL: tun: ioctl(TUNSETIFF) failed
2025/12/22 13:21 android13-5.15-lts 050dc55b0457 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf SYZFAIL: tun: ioctl(TUNSETIFF) failed
2025/12/18 11:48 android13-5.15-lts 050dc55b0457 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf SYZFAIL: tun: ioctl(TUNSETIFF) failed
2025/12/14 16:25 android13-5.15-lts 057fdbf6d3c7 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf SYZFAIL: tun: ioctl(TUNSETIFF) failed
2025/12/13 20:45 android13-5.15-lts 057fdbf6d3c7 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf SYZFAIL: tun: ioctl(TUNSETIFF) failed
2025/12/11 13:10 android13-5.15-lts 057fdbf6d3c7 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf SYZFAIL: tun: ioctl(TUNSETIFF) failed
2025/12/09 13:07 android13-5.15-lts 057fdbf6d3c7 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf SYZFAIL: tun: ioctl(TUNSETIFF) failed
2025/12/07 11:00 android13-5.15-lts 057fdbf6d3c7 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: ioctl(TUNSETIFF) failed
2025/12/07 06:14 android13-5.15-lts 057fdbf6d3c7 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf SYZFAIL: tun: ioctl(TUNSETIFF) failed
2025/12/05 23:03 android13-5.15-lts 057fdbf6d3c7 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 SYZFAIL: tun: ioctl(TUNSETIFF) failed
2025/12/04 19:59 android13-5.15-lts 057fdbf6d3c7 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf SYZFAIL: tun: ioctl(TUNSETIFF) failed
2025/12/04 15:25 android13-5.15-lts 057fdbf6d3c7 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf SYZFAIL: tun: ioctl(TUNSETIFF) failed
2025/12/03 05:22 android13-5.15-lts 057fdbf6d3c7 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf SYZFAIL: tun: ioctl(TUNSETIFF) failed
2025/12/03 00:06 android13-5.15-lts 057fdbf6d3c7 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf SYZFAIL: tun: ioctl(TUNSETIFF) failed
2025/12/02 00:01 android13-5.15-lts 057fdbf6d3c7 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf SYZFAIL: tun: ioctl(TUNSETIFF) failed
* Struck through repros no longer work on HEAD.