Date: Thu, 22 Nov 2007 08:53:04 +0100 From: Pietro Cerutti <gahr@gahr.ch> To: Jason Evans <jasone@freebsd.org> Cc: freebsd-hackers@freebsd.org Subject: Re: assertion failed on malloc.c Message-ID: <47453560.3040604@gahr.ch> In-Reply-To: <4744EFC9.50409@freebsd.org> References: <474420B8.10203@gahr.ch> <4744EFC9.50409@freebsd.org>
next in thread | previous in thread | raw e-mail | index | archive | help
This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig5D9F5DB725C5D292CBC16CF8 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Jason Evans wrote: > Pietro Cerutti wrote: >>> uname -r >> 8.0-CURRENT >> >> Mplayer always crashes quitting .flv video (either by pressing 'q' or >> because the video is over). >> >> The error is: >> >> Assertion failed: (diff =3D=3D regind * size), function >> arena_run_reg_dalloc, file /usr/src/lib/libc/stdlib/malloc.c, line 171= 4. >> >> Removing the assert at line 1714 and recompiling libc solves the >> problem, but I'm not that familiar with the current malloc >> implementation to know whether (diff =3D=3D regind * size) is always >> supposed to be true (thus a bug in mplayer) or the assertion is simply= >> wrong. >=20 > This is probably due to attempted deallocation of an invalid pointer. > This could be either a double free or a totally bogus deallocation, > perhaps of a pointer that is within a valid object. >=20 > Removing the assertion in malloc.c simply allows undefined behavior > beyond where the assertion failure would have caused a crash. The > failure modes can be serious, such as memory corruption or a > segmentation fault. Thanks for analyzing this. In this case, I'll go on looking for the bug in mplayer. >=20 > Jason --=20 Pietro Cerutti PGP Public Key: http://gahr.ch/pgp --------------enig5D9F5DB725C5D292CBC16CF8 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (FreeBSD) iD8DBQFHRTVnwMJqmJVx944RCsXqAJ0RWIC9H+7i6H1ti5EmbI/g9CRd+ACfTdeD X7pEJfLgy7F1oG6JZ+cu71w= =N60J -----END PGP SIGNATURE----- --------------enig5D9F5DB725C5D292CBC16CF8--
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?47453560.3040604>