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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: 204d, last: 38d
▶ ▼ 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 1741d 1741d 0/3 auto-closed as invalid on 2021/10/22 18:00
openbsd SYZFAIL: tun: can't open device (6) -1 31 271d 312d 0/3 auto-obsoleted due to no activity on 2025/09/21 09:12
openbsd SYZFAIL: tun: can't open device (3) -1 86 1567d 1567d 0/3 closed as invalid on 2022/01/15 08:41
openbsd SYZFAIL: tun: can't open device (5) -1 82 418d 433d 0/3 auto-obsoleted due to no activity on 2025/04/27 11:29
openbsd SYZFAIL: tun: can't open device -1 syz 4 1883d 1883d 3/3 fixed on 2021/03/10 05:59
openbsd SYZFAIL: tun: can't open device (4) -1 8 557d 658d 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/tap5 (errno 16: Device busy)
SYZFAIL: ioctl remote attach failed
 (errno 16: Device busy)
ifconfig: socket: No buffer space available
SYZFAIL: tun: can't open device
device=/dev/tap5 (errno 16: Device busy)
ifconfig: socket: No buffer space available
SYZFAIL: tun: can't open device
device=/dev/tap5 (errno 16: Device busy)
ifconfig: socket: No buffer space available
SYZFAIL: tun: can't open device
device=/dev/tap5 (errno 16: Device busy)
ifconfig: socket: No buffer space available
SYZFAIL: tun: can't open device
device=/dev/tap5 (errno 16: Device busy)
SYZFAIL: ioctl remote attach failed
 (errno 16: Device busy)
ifconfig: socket: No buffer space available
SYZFAIL: tun: can't open device
device=/dev/tap5 (errno 16: Device busy)
ifconfig: socket: No buffer space available
SYZFAIL: tun: can't open device
device=/dev/tap5 (errno 16: Device busy)
ifconfig: socket: No buffer space available
SYZFAIL: tun: can't open device
device=/dev/tap5 (errno 16: Device busy)
ifconfig: socket: No buffer space available
SYZFAIL: tun: can't open device
device=/dev/tap5 (errno 16: Device busy)
ifconfig: socket: No buffer space available
SYZFAIL: tun: can't open device
device=/dev/tap5 (errno 16: Device busy)
ifconfig: socket: No buffer space available
SYZFAIL: tun: can't open device
device=/dev/tap5 (errno 16: Device busy)
ifconfig: socket: No buffer space available
SYZFAIL: tun: can't open device
device=/dev/tap5 (errno 16: Device busy)
SYZFAIL: ioctl remote attach failed
 (errno 16: Device busy)
ifconfig: socket: No buffer space available
SYZFAIL: tun: can't open device
device=/dev/tap5 (errno 16: Device busy)
ifconfig: socket: No buffer space available
SYZFAIL: tun: can't open device
device=/dev/tap5 (errno 16: Device busy)
ifconfig: socket: No buffer space available
SYZFAIL: tun: can't open device
device=/dev/tap5 (errno 16: Device busy)
ifconfig: socket: No buffer space available
SYZFAIL: tun: can't open device
device=/dev/tap5 (errno 16: Device busy)
ifconfig: socket: No buffer space available
SYZFAIL: tun: can't open device
device=/dev/tap5 (errno 16: Device busy)
SYZFAIL: repeatedly failed to execute the program
proc=5 req=6 state=1 status=67 (errno 4: Interrupted system call)


OpenBSD/amd64 (ci-openbsd-main-0.us-central1-b.c.syzkaller.internal) (tty00)

login: uvn_flush: obj=0xfffffd806f51d7d8, 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:
Login incorrect

Crashes (221):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/03/23 13:30 openbsd ccfcb3e6ef18 5e3db351 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/03/22 14:09 openbsd 67e6794a9e1c 5b92003d .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/03/22 09:59 openbsd 67e6794a9e1c 5b92003d .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/03/22 05:40 openbsd 67e6794a9e1c 5b92003d .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/03/22 03:49 openbsd 8aa14d77a9ab 5b92003d .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/03/21 13:07 openbsd a71bcab410b6 5b92003d .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/03/19 16:41 openbsd e3f28ea82b45 0291cd06 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/03/19 03:28 openbsd cf7d68fc25cd 0199f9a1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/03/18 11:12 openbsd 561bf2d2294a 0199f9a1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/03/17 14:49 openbsd 7b59c65f5490 0737c18f .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/03/16 01:39 openbsd fd49698d88e5 351cb5cf .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/03/15 05:20 openbsd fd49698d88e5 351cb5cf .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/03/15 00:31 openbsd fd49698d88e5 351cb5cf .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/03/14 07:44 openbsd fd49698d88e5 351cb5cf .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/03/14 05:14 openbsd fd49698d88e5 351cb5cf .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/03/13 11:34 openbsd fd49698d88e5 2f7f359d .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/03/13 06:19 openbsd fd49698d88e5 2f7f359d .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/03/12 15:10 openbsd fd49698d88e5 4efadf07 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/03/12 07:31 openbsd 73e77b6607d4 2d88ab01 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/02/13 06:13 openbsd 829f23bb157c 018ebef2 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/02/11 12:55 openbsd 960213463517 018ebef2 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/02/09 19:12 openbsd a82d9bb4a825 018ebef2 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/02/09 03:21 openbsd e6ae0557afc8 018ebef2 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/02/08 20:28 openbsd 3c0af00218ea 018ebef2 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/02/07 08:52 openbsd 9d884ef6f275 018ebef2 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/02/07 01:53 openbsd 468b83701423 018ebef2 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/02/05 07:19 openbsd f4cdf487c26e 018ebef2 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/02/04 10:31 openbsd 75991a0e19ad 018ebef2 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/02/03 08:54 openbsd 2933a3218787 018ebef2 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/02/03 06:46 openbsd 2933a3218787 018ebef2 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/02/03 05:17 openbsd 2933a3218787 018ebef2 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/02/02 06:29 openbsd 28dc9acc561e 6b8752f2 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/02/01 20:01 openbsd 455fdbe5e703 6b8752f2 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/02/01 03:47 openbsd 43ad07ab5076 6b8752f2 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/01/30 21:35 openbsd dfcd5193b8f0 ae7dc18c .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/01/29 10:41 openbsd 132d3f17556a b78a7341 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/01/28 16:10 openbsd b766929b796e 004c195c .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/01/27 19:13 openbsd 4b649cda673b 71ad32b1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/01/27 12:56 openbsd 4b649cda673b 71ad32b1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/01/26 12:37 openbsd 4c8dfe351ad4 a4c52dd6 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/01/26 09:04 openbsd 401b985036af 55756628 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main SYZFAIL: tun: can't open device
2026/01/25 16:44 openbsd f99cc216b56b 40acda8a .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.