Mercurial > hg > nginx-quic
view auto/cc/ccc @ 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 | d620f497c50f |
children |
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# Copyright (C) Igor Sysoev # Copyright (C) Nginx, Inc. # Compaq C V6.5-207 ngx_include_opt="-I" # warnings CFLAGS="$CFLAGS -msg_enable level6 -msg_fatal level6" CFLAGS="$CFLAGS -msg_disable unknownmacro" CFLAGS="$CFLAGS -msg_disable unusedincl" CFLAGS="$CFLAGS -msg_disable unnecincl" CFLAGS="$CFLAGS -msg_disable nestincl" CFLAGS="$CFLAGS -msg_disable strctpadding" CFLAGS="$CFLAGS -msg_disable ansialiascast" CFLAGS="$CFLAGS -msg_disable inlinestoclsmod" CFLAGS="$CFLAGS -msg_disable cxxkeyword" CFLAGS="$CFLAGS -msg_disable longlongsufx" CFLAGS="$CFLAGS -msg_disable valuepres" # STUB CFLAGS="$CFLAGS -msg_disable truncintcast" CFLAGS="$CFLAGS -msg_disable trunclongcast" CFLAGS="$CFLAGS -msg_disable truncintasn" CFLAGS="$CFLAGS -msg_disable trunclongint" CFLAGS="$CFLAGS -msg_disable intconcastsgn" CFLAGS="$CFLAGS -msg_disable intconstsign" CFLAGS="$CFLAGS -msg_disable switchlong" CFLAGS="$CFLAGS -msg_disable subscrbounds2" CFLAGS="$CFLAGS -msg_disable hexoctunsign" CFLAGS="$CFLAGS -msg_disable ignorecallval" CFLAGS="$CFLAGS -msg_disable nonstandcast" CFLAGS="$CFLAGS -msg_disable embedcomment" CFLAGS="$CFLAGS -msg_disable unreachcode" CFLAGS="$CFLAGS -msg_disable questcompare2" CFLAGS="$CFLAGS -msg_disable unusedtop" CFLAGS="$CFLAGS -msg_disable unrefdecl" CFLAGS="$CFLAGS -msg_disable bitnotint"