Mercurial > hg > nginx
view auto/cc/ccc @ 4895:508e61393b6c
Event pipe: fixed handling of buf_to_file data.
Input filter might free a buffer if there is no data in it, and in case
of first buffer (used for cache header and request header, aka p->buf_to_file)
this resulted in cache corruption. Buffer memory was reused to read upstream
response before headers were written to disk.
Fix is to avoid moving pointers in ngx_event_pipe_add_free_buf() to a buffer
start if we were asked to free a buffer used by p->buf_to_file.
This fixes occasional cache file corruption, usually resulted
in "cache file ... has md5 collision" alerts.
Reported by Anatoli Marinov.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Tue, 30 Oct 2012 11:14:24 +0000 |
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"