Date: Sun, 24 Jan 2016 00:39:01 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 206551] Integer overflow in iconv kernel module Message-ID: <bug-206551-8-i5XrX6ExyO@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-206551-8@https.bugs.freebsd.org/bugzilla/> References: <bug-206551-8@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=206551 --- Comment #1 from CTurt <ertl.chris@gmail.com> --- Sorry, made a mistake in my report. Supplying a size of `-1` actually passes `0xffffffffffffffff` to `malloc` and `copyin`. However, since `malloc` truncates sizes to 32bit (at least version 9.0 did), this will result in an allocation of `0xffffffff`, but copy length of `0xffffffffffffffff`. If there is enough memory for this allocation to succeed, a heap overflow will occur. -- You are receiving this mail because: You are the assignee for the bug.help
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