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SYZFAIL: tun: can't open device (7)

Status: upstream: reported on 2025/10/07 22:59
Reported-by: syzbot+5b4a2a90d1e5ea8e82e0@syzkaller.appspotmail.com
First crash: 107d, last: 19h38m
▶ ▼ Similar bugs (6)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
openbsd SYZFAIL: tun: can't open device (2) -1 1 1644d 1644d 0/3 auto-closed as invalid on 2021/10/22 18:00
openbsd SYZFAIL: tun: can't open device (6) -1 31 174d 215d 0/3 auto-obsoleted due to no activity on 2025/09/21 09:12
openbsd SYZFAIL: tun: can't open device (3) -1 86 1470d 1470d 0/3 closed as invalid on 2022/01/15 08:41
openbsd SYZFAIL: tun: can't open device (5) -1 82 321d 336d 0/3 auto-obsoleted due to no activity on 2025/04/27 11:29
openbsd SYZFAIL: tun: can't open device -1 syz 4 1786d 1786d 3/3 fixed on 2021/03/10 05:59
openbsd SYZFAIL: tun: can't open device (4) -1 8 460d 561d 0/3 auto-obsoleted due to no activity on 2025/01/18 18:59

Sample crash report:
SYZFAIL: tun: can't open device
device=/dev/tap6 (errno 16: Device busy)
ifconfig: socket: No buffer space available
SYZFAIL: tun: can't open device
device=/dev/tap6 (errno 16: Device busy)
ifconfig: socket: No buffer space available
SYZFAIL: tun: can't open device
device=/dev/tap6 (errno 16: Device busy)
ifconfig: socket: No buffer space available
SYZFAIL: tun: can't open device
device=/dev/tap6 (errno 16: Device busy)
ifconfig: socket: No buffer space available
SYZFAIL: tun: can't open device
device=/dev/tap6 (errno 16: Device busy)
ifconfig: socket: No buffer space available
SYZFAIL: tun: can't open device
device=/dev/tap6 (errno 16: Device busy)
ifconfig: socket: No buffer space available
SYZFAIL: tun: can't open device
device=/dev/tap6 (errno 16: Device busy)
ifconfig: socket: No buffer space available
SYZFAIL: tun: can't open device
device=/dev/tap6 (errno 16: Device busy)
ifconfig: socket: No buffer space available
SYZFAIL: tun: can't open device
device=/dev/tap6 (errno 16: Device busy)
ifconfig: socket: No buffer space available
SYZFAIL: tun: can't open device
device=/dev/tap6 (errno 16: Device busy)
ifconfig: socket: No buffer space available
SYZFAIL: tun: can't open device
device=/dev/tap6 (errno 16: Device busy)
ifconfig: socket: No buffer space available
SYZFAIL: tun: can't open device
device=/dev/tap6 (errno 16: Device busy)
ifconfig: socket: No buffer space available
SYZFAIL: tun: can't open device
device=/dev/tap6 (errno 16: Device busy)
ifconfig: socket: No buffer space available
SYZFAIL: tun: can't open device
device=/dev/tap6 (errno 16: Device busy)
ifconfig: socket: No buffer space available
SYZFAIL: tun: can't open device
device=/dev/tap6 (errno 16: Device busy)
ifconfig: socket: No buffer space available
SYZFAIL: tun: can't open device
device=/dev/tap6 (errno 16: Device busy)
ifconfig: socket: No buffer space available
SYZFAIL: tun: can't open device
device=/dev/tap6 (errno 16: Device busy)
ifconfig: socket: No buffer space available
SYZFAIL: tun: can't open device
device=/dev/tap6 (errno 16: Device busy)
ifconfig: socket: No buffer space available
SYZFAIL: tun: can't open device
device=/dev/tap6 (errno 16: Device busy)
ifconfig: socket: No buffer space available
SYZFAIL: tun: can't open device
device=/dev/tap6 (errno 16: Device busy)
SYZFAIL: repeatedly failed to execute the program
proc=6 req=7 state=1 status=67 (errno 35: Resource temporarily unavailable)



OpenBSD/amd64 (ci-openbsd-main-3.us-central1-b.c.syzkaller.internal) (tty00)

login: uvn_flush: obj=0xfffffd807484e648, offset=0x3ff000.  error during pageout.
uvn_flush: WARNING: changes to page may be lost!
set $lines = 0
Password:
Login incorrect
login: show panic
Password:
Login incorrect
login: show registers
Password:
Login incorrect
login: ps
Password:
Login incorrect
show malloc
login: Password:

Crashes (173):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/01/23 00:38 openbsd 9e4d3748fbc0 56f88057 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/01/22 09:51 openbsd 72d111245f15 56f88057 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/01/21 21:31 openbsd bf8f984edd8f 56f88057 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/01/21 12:55 openbsd 5c0c839c3d8f 56f88057 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/01/20 23:34 openbsd bbdb2fea834c 56f88057 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/01/20 09:24 openbsd 4dbb760ec6c4 56f88057 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/01/19 03:09 openbsd 085960a72a94 56f88057 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/01/18 20:47 openbsd 8be1667ad841 56f88057 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/01/17 17:56 openbsd 5569d0f08b09 56f88057 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/01/16 18:46 openbsd 8105fbd98be2 56f88057 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/01/14 21:57 openbsd bf518416d64f 56f88057 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/01/13 06:24 openbsd a9df5e8d0934 56f88057 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/01/13 04:56 openbsd a9df5e8d0934 56f88057 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/01/13 00:53 openbsd a9df5e8d0934 56f88057 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/01/12 23:37 openbsd a9df5e8d0934 56f88057 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/01/12 15:52 openbsd 01b5bc711c3b 56f88057 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/01/12 08:15 openbsd 01b5bc711c3b 56f88057 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/01/11 18:04 openbsd 294bdc40ca4d 56f88057 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/01/11 00:22 openbsd 7ae91379da7d 56f88057 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/01/09 20:39 openbsd 2bce6ca4aaa2 56f88057 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/01/09 01:28 openbsd 0f50c032e950 c1f5c7d0 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/01/08 07:21 openbsd d77c41cf8f5a c1f5c7d0 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/01/05 18:03 openbsd 97968167a1e0 917fe602 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/01/04 19:24 openbsd 079c76c73fb6 e3fbc05e .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/01/04 14:22 openbsd f9943f26ca81 e3fbc05e .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/01/02 17:11 openbsd e29e388b5d06 af6b70b9 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/01/02 15:58 openbsd e29e388b5d06 af6b70b9 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/01/02 13:56 openbsd e29e388b5d06 af6b70b9 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2025/12/31 06:58 openbsd 59b265ba3157 d32f762a .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2025/12/31 01:39 openbsd 59b265ba3157 d32f762a .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2025/12/30 15:03 openbsd e93b8ae725cf d32f762a .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2025/12/30 13:14 openbsd e93b8ae725cf d32f762a .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2025/12/30 09:58 openbsd 163664d81c58 17e6c961 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2025/12/30 05:56 openbsd 163664d81c58 17e6c961 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2025/12/29 23:01 openbsd 4420759a09aa 9831da75 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2025/12/29 15:58 openbsd 4420759a09aa 9831da75 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2025/12/28 06:19 openbsd d9ef728109ec 5dc09de1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2025/12/27 23:33 openbsd d9ef728109ec 5dc09de1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2025/12/27 07:50 openbsd 5ce3a7f811ea 5dc09de1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2025/12/27 03:11 openbsd 5ce3a7f811ea 5dc09de1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2025/12/26 21:15 openbsd 5ce3a7f811ea 5dc09de1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2025/12/26 08:07 openbsd 97e1364f97a2 5dc09de1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2025/12/24 08:39 openbsd 2a2497efc5fa 5dc09de1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2025/12/24 04:42 openbsd 2a2497efc5fa 5dc09de1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2025/10/09 05:44 openbsd 42468faed836 7e2882b3 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore SYZFAIL: tun: can't open device
2025/10/07 22:59 openbsd a66c1d641baa 7e2882b3 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
* Struck through repros no longer work on HEAD.