Date: Mon, 02 Mar 2026 18:12:26 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 293548] ocserv: kernel panic with tun interfaces Message-ID: <bug-293548-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=293548 Bug ID: 293548 Summary: ocserv: kernel panic with tun interfaces Product: Base System Version: 15.0-RELEASE Hardware: amd64 OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: mcurex@yandex.ru Created attachment 268484 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=268484&action=edit core.1.1.txt - first halt uname -sri FreeBSD 15.0-RELEASE-p2 GENERIC swapinfo Device 1K-blocks Used Avail Capacity /dev/da0p3 4194264 0 4194264 0% Details of diagnostics in attached reports, two halts, two files. My config are: Two ocserv servers, with own pid files, own configs, one on socket ${INET_IF}:4444, another on ${INET_IF}:5555 After connect via client software something more, than 10 users, kernel halt on panic with tuncreate() problem. Short analyze: Basic info. Panic: page fault (page error) Address of halt: 0x8 (read by zero point + movement) Proccess: ocserv (PID 4055) Place of halt: /usr/src/sys/net/if_tuntap.c:1013, function tuncreate() Execution stack: tuncreate() → tun_clone_create() → if_clone_create() → tunclone() → devfs_lookup() → namei() → vn_open_cred() → sys_openat() Problem is, trying to create from ocserv TUN-interface (/dev/tun34) started to create point for the pointer, that dosen't exists tuncreate(). First crash (core.1.1.txt) Place of halt: __mtx_lock_sleep() in tuncreate():1043 Address: 0x488 type: mutex block Second crash core.2.txt Place of halt: tuncreate():1013 Address: 0x8 type: Page fault (NULL deref) Shared: Creation of tun-interfaces via ocserv Both crashes are on the one driver of TUN-devices, but in different places of code — IMHO, that's the system problem in tuntap FreeBSD 15.0-RELEASE-p2. -- You are receiving this mail because: You are the assignee for the bug.home | help
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