Date: Tue, 06 Sep 2016 16:06:55 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 212418] kernel panic in _taskqgroup_adjust - uninitialized variable Message-ID: <bug-212418-8@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D212418 Bug ID: 212418 Summary: kernel panic in _taskqgroup_adjust - uninitialized variable Product: Base System Version: 11.0-STABLE Hardware: Any OS: Any Status: New Severity: Affects Many People Priority: --- Component: kern Assignee: freebsd-bugs@FreeBSD.org Reporter: shawn.webb@hardenedbsd.org The variable qid in the fuunction _taskqgroup_adjust in sys/kern/subr_gtaskqueue.c is used uninitialized in some instances. On my Purism Librem 15, this variable is always unitialized. I wrote a little patch to detect when it hasn't been set, but is being used here: https://github.com/HardenedBSD/hardenedBSD-playground/commit/7c3b5f7624459e= 8108873861442be5ce9f497ad7 100% of the time on the Librem 15 at bootup, qid will end up hitting the KASSERT. I haven't studied the code to figure out a fix, yet. Without the patch, though, the code in question will cause a write to an arbitrary location, occasionally causing a kernel panic at bootup. With the patch, the system is unbootable since qid is always -1. --=20 You are receiving this mail because: You are the assignee for the bug.=
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