Mercurial > hg > nginx-quic
view auto/cc/acc @ 7422:2dad54c2b8ed stable-1.14
Mp4: fixed possible pointer overflow on 32-bit platforms.
On 32-bit platforms mp4->buffer_pos might overflow when a large
enough (close to 4 gigabytes) atom is being skipped, resulting in
incorrect memory addesses being read further in the code. In most
cases this results in harmless errors being logged, though may also
result in a segmentation fault if hitting unmapped pages.
To address this, ngx_mp4_atom_next() now only increments mp4->buffer_pos
up to mp4->buffer_end. This ensures that overflow cannot happen.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Wed, 21 Nov 2018 20:23:16 +0300 |
parents | 9eefb38f0005 |
children |
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# Copyright (C) Igor Sysoev # Copyright (C) Nginx, Inc. # aCC: HP ANSI C++ B3910B A.03.55.02 # C89 mode CFLAGS="$CFLAGS -Ae" CC_TEST_FLAGS="-Ae" PCRE_OPT="$PCRE_OPT -Ae" ZLIB_OPT="$ZLIB_OPT -Ae"