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: 436d, last: 3h19m
▶ ▼ 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 12 210d 331d 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 4 10d 307d 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 1768d 1768d 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 64 now 1035d 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 140 21m 1656d 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 483d 1844d 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 1655d 1797d 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 46 16h32m 1035d 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 651d 651d 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 1951d 1951d 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 710d 1015d 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 5 245d 305d 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 (81):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
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
2026/09/10 16:37 android16-6.12 89698cd757af 1fe56c0a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/09/10 15:54 android16-6.12 89698cd757af 1fe56c0a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/09/10 12:38 android16-6.12 89698cd757af 1fe56c0a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/09/10 11:01 android16-6.12 89698cd757af 1fe56c0a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/09/10 09:47 android16-6.12 89698cd757af 4e8b1cc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/09/10 08:42 android16-6.12 89698cd757af 4e8b1cc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/09/10 05:41 android16-6.12 89698cd757af 4e8b1cc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/09/09 16:16 android16-6.12 d768b2f486b5 8387c273 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/09/09 14:32 android16-6.12 d768b2f486b5 8387c273 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/09/09 12:35 android16-6.12 d768b2f486b5 8387c273 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/09/09 07:25 android16-6.12 d768b2f486b5 8387c273 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/09/09 06:51 android16-6.12 d768b2f486b5 8387c273 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/09/08 14:08 android16-6.12 136b3cf43ec1 680aa3e1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/09/08 10:44 android16-6.12 e0485c4d49da 680aa3e1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2026/02/23 16:42 android16-6.12 c42c886c1098 6beca497 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2025/11/12 11:06 android16-6.12 0d6730ee6542 4e1406b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2025/11/11 01:11 android16-6.12 0d6730ee6542 4e1406b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2025/11/10 08:15 android16-6.12 0d6730ee6542 4e1406b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2025/11/09 20:20 android16-6.12 0d6730ee6542 4e1406b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2025/11/09 17:15 android16-6.12 0d6730ee6542 4e1406b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2025/11/08 20:42 android16-6.12 0d6730ee6542 4e1406b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2025/11/08 18:13 android16-6.12 0d6730ee6542 4e1406b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2025/11/08 03:44 android16-6.12 0d6730ee6542 4e1406b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2025/11/06 23:31 android16-6.12 0d6730ee6542 4e1406b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2025/11/06 13:54 android16-6.12 0d6730ee6542 a6c9c731 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2025/11/06 06:43 android16-6.12 0d6730ee6542 a6c9c731 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2025/11/06 05:50 android16-6.12 0d6730ee6542 a6c9c731 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2025/11/06 01:57 android16-6.12 0d6730ee6542 a6c9c731 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2025/11/04 02:23 android16-6.12 0d6730ee6542 686bf657 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2025/10/31 13:01 android16-6.12 0d6730ee6542 2c50b6a9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2025/10/30 06:36 android16-6.12 0d6730ee6542 fd2207e7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2025/10/28 04:47 android16-6.12 0d6730ee6542 fd2207e7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2025/10/25 17:00 android16-6.12 0d6730ee6542 c0460fcd .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2025/10/23 10:32 android16-6.12 0d6730ee6542 c0460fcd .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2025/10/22 20:12 android16-6.12 0d6730ee6542 c0460fcd .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2025/10/21 15:35 android16-6.12 0d6730ee6542 9832ed61 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2025/10/20 01:03 android16-6.12 285c84322cb6 1c8c8cd8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2025/10/19 09:29 android16-6.12 285c84322cb6 1c8c8cd8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2025/10/18 21:08 android16-6.12 046b3205aa42 1c8c8cd8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2025/10/16 18:03 android16-6.12 101347b9f28f 19568248 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2025/10/16 14:49 android16-6.12 101347b9f28f 19568248 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2025/10/16 12:50 android16-6.12 101347b9f28f 19568248 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2025/10/15 12:22 android16-6.12 be9ba86c24fc b6605ba8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2025/07/10 21:01 android16-6.12 8ea40f524391 3cda49cf .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust SYZFAIL: tun: can't open /dev/net/tun
2025/07/01 04:35 android16-6.12 668635cd345a 6e83b42d .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.