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Patch zlib_filter_segfault_fix for *Network Functions Bug #52944

Patch version 2010-09-29 01:54 UTC

Return to Bug #52944 | Download this patch
Patch Revisions:

Developer: cataphract@php.net

Index: ext/zlib/tests/bug_52944.phpt
===================================================================
--- ext/zlib/tests/bug_52944.phpt	(revision 0)
+++ ext/zlib/tests/bug_52944.phpt	(revision 0)
@@ -0,0 +1,157 @@
+--TEST--
+Bug #52944 (segfault with zlib filter and corrupted data)
+--SKIPIF--
+<?php if (!extension_loaded("zlib")) print "skip"; ?>
+--INI--
+allow_url_fopen=1
+--FILE--
+<?php
+$data =
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+'0oKRSZlPU+yA5EwBnFmIcHeI+O5D1APFv+qE5pPucpvziErcl2klzWV0V9ZMmXN3eF9eEISUaXXNfFHPyl9de9KlwlPckGIYKytd'.
+'gX2lrhSwNfFC/8vak2vRl+RDwboaQnGUt55v1nwE97ZLbRk3rLvirHEJKuGAavH4S9tV7Kv7c64Um/aku1Iv9dkcHA80rqLj0vY9'.
+'ybPGnybh8CtaWGjjw3kLTSz34HwkDzbynl4s9eRxcUG33B1kg/tRAoWGT9gif7cLhZvLPaXRDyESeGDwl/Go7X64QtiitE4CzRPA'.
+'mR96Ozej6B48QH/woTbaDVGvUXRtgEytYa9it5hK074AVQiolnuAzFhR0K0APqxYsW/nIkQPj3y7dNmNU7LmQymz+QxQbIpoiMoL'.
+'xfqh5MpxxFYY+w8NUO7Ky3hs1FfkMFDJjxLoATSSHySSdDgUBNk8NNVEULhDYO6mNVOpkC+bR0e+m3bwZPu8DMWFzoE8Sr7n1O1v'.
+'a/Vn3zX5Op9ak6fqB7SMXOpEI1x1+qbj1JWeHPC5/3g6e/9JzV6nzn5BVXM9vEQEJy4G8hDG1afZeje+GqK73+2a/ICK1RisdtNF'.
+'W2hZkSPCFaiBmQ1FI3zSX+mB6sqQrV7kmf9/fDrkqIA8Hz5IgeVBfsD+KxABGNcBvptDBgPo8KRuPzN/N2JgTdSRUrOfPflrGGQe'.
+'cb8QBXT0M5XKr9CTKwz0i3SoAw3TnUoYxSHILStxQcq4hyoOisNbJ7orocrFfy12kk89VteyhOWyYP9txQhR1suLsguUU10qDyjo'.
+'GMAMa89MUzZO6YKLnI6vAMeaqiL+FTjp/v3aeiW11CUFKQ8y/krXqhGwSt/5GKWgNl8Y9dU1+9tnpmoHfWs/e772DM0SREe8TAxv'.
+'rM2FxZZi8wQANK+GD4Xs6fc5CNbstRyG79cVHPOyPC/k+e6pyIUhdxkX3EuM7gvUWUXPyFZ7BnM8WRNUpoGS9vXcboEMK6GapScy'.
+'4qK0wQGSvHltdbULPjH5xQ18z0Jb6GQ/uRyQAuU2dKpT+5eTYBIUA2MCx+UVdKvlqJPpdMEzzomXptejkeuH46l+JoRmVgURxGgE'.
+'lmeL1VFaF7+7E+uGTT52PftKE+zw+Y9t+O/773UR6RNwAFaxbDwzKC3LvcKCWnhKkQjO4ly3hTY0+Cxmq4Cs4c+4Om3ntvipQ8v6'.
+'YMeJtcHbti0a7dRmQRpJ0bZuiaR8Zkq2Auylq/kWd34ja7Bwyv0IN3+Pi2uNSpGBCESeZU0W8ajcagFNdKV7JPhCR3uQhIG4Y5qW'.
+'EZSNLKE3wQ2c7bCPgZakYbw0MsC8zZ7nLSHarYB5SIZOFBh1XgjzOw5//v9XKLNoVJpjO8DdHkkDXx7JLvOhv+xeIsKe54xcER3+'.
+'deO2JcetGDLlUdi6dxS2lVFIIel3d8/Sc1zSwJTscXWt4VZEmKyuNUWQshwqKyszuu4oF6eMq2Q0pKXwsGq4hCcGbisdUrfie6MO'.
+'8tkqDhuz2XbaK2tpdJcPhpv/ot30Mfa6AkmtEsmXFjbLN+xL8auhVS25m+Brh5oMlv29G1WI+/raOrUEL+rtGz3fzkwyYHcqb6qQ'.
+'ONp5c76/c8w3/eI6He2zEKl4uK++2e9r7TDotxItBhxxGLR0BWQNQN65SXIdxQDRioZLY43C4FSgdQTqo77VXJyRJqmQ8LEcGki+'.
+'QaJCPwXovagTDrUw0cLhldsPc0U+g+87AzfsF77/YeH1zs52RXNkclV7wpjbk8Ksqdiv42jYYdx/WHh3dPh6d2+nogDlC5UxlyAq'.
+'IBb0+uSd1pdNpcIsbV2ju3i1QQj8MxkUs61XZrO1owADcP0xSF7KL2v9anP7/Hhn82jrraN/jCaa72KNwIJuaa5GO2w0jtzVrsNx'.
+'F2Q5COWpNnJjdwDaME7sF178Ev+9A2WXaC9cjY4HXFrlg71xG+rSSyDqi1X3paWNI4GaqNwPRDXev9s7hHq8PjzaP9/df+Poq8lq'.
+'OOisnuPdyKvBcJV1pd0J25xh5/z4ZPPk/fGrzaPz7Z3Xm+/3Tk52fj7hfX6OtnQc9ANqazvqY1C9top7u9Vcx5s/7ZxneSjXm2Cs'.
+'4emFVbAnh4d7J7vvOIuApRZQjqSY5Wjn9VER/VHQBhp1IUMyroIvFiHhZTHlXFCx3YM3spxH1HL3Co1X2y7CnhyebO4hmxwLeAA+'.
+'icau6IiGxhk2f9j8+fzD5m5a8ew/yLAVDYdAWChBgT7eOdiuhD4G9YqcQ3szZY32j9+c7xwdaVpllp04jmIt8v0JDLzHWY7jo5/O'.
+'63MKweN/xIWFZFfEgR91huEneAH6jUCWBoIY2OeHP84p+jWRGa3UlpZM6E709qTfnyq1qM4rCNMBtTvpk+pNHucKXKvOsykHwf2F'.
+'YtPXKhGcgJgEBu9HuDqkBRnpgHYamAGYiqKUC2lF13SYNJq3eezr1dhxSasNpL12k+EvIBSkCaz2y+bJyRyKgP0KWghjo/OFPeW9'.
+'uI8eKZ0HYmoydKn1odcPNKV+rw/3tneOKvuLhnaSgR4cahI3IT+Ism8fd45z3z4GSa6L1ufzBPfOkpA7b452t2G04mEU5ziacuBH'.
+'Ad5BwvRm9AT+ZufkfG/34McidilvEokcgc7fH+1V1gXSGSdBvT3Z36uConRAmiiwIFff71dSEKzKKJ4M0goIWXrOcuLdztH5u803'.
+'Owxer2Ut2t59t4d0LQ3GLvMic9xtbaataLf1mRa1tdu12VIZwfnJuz0FQf40AC314VGApJfg2OPoPW6v4dAL3qzOx5PUzeUlTewT'.
+'hiFQKn+WVeCE5Ofbww/nr48O9/Mt0NpxNGgsVQGfHKrNHYf9fhnu/at9VXziWEDzTIHb2X938rFIP+JYaqoC+WoHOm+nAAqQeJKS'.
+'Arb5+gT6CqAeKTDY6JpKdLALzk92T1SmJcDP/8fnv3z+p8///Ot/0j7/4+f/S/v8v37+y6//y+d/+PxPGnz63z//Z+3zvwDEv3z+'.
+'r5//UUW3t31UwofoOPs/ahneYq79j/l8kGt/Who3W4d77/cPzunglxyZYJCVwd4d7f60ebKj0CgOr1x/WoY83v1zHuExKIsy2HaG'.
+'TYzAEcpP7KI50Gsq9HYlWElmoIipaMzO0e7htiqNp6MKsP0dcL+3c3wx1TjevaLZOSGAbDnAY2+q6HNSpE9VU7YO3x+cHH1UlSCg'.
+'i6e/udG7B1uHWVcD2O4QdE4F4Kv3H4/zFXQrOWd7r8Dp231VBh1+OEC7syjEtoWirADNCWcA3UutRaEXjk9guJYE7RHPA1VVEI9K'.
+'rSg7qOo/suXUVo/B4kiq6Pj6MFc+nog5D1/90SOqIc45zS20XmOwTW+S3Ae1RlBvaQ5hPtQ6QW0Jc6I/1eKHSn+uVlLzprQnvwy+'.
+'uXWye3igcjgf4FQCPNpXB3eKujy0918dwuPh+3evPqqKO44mI6hGCfTVx+1NhTUBtOVOkwqwDzs7P6pdeR0EF1Vw+8Aeb48zuEE0'.
+'HHcF4NbbzaMTAVnidDQupcVXAV+SL6T3QKmGUnKo0PeNtyJcJmYknHYV9Seyu/KVBlbND09w2LMhX0KdQqeo54GTt5PCp67OPPD1'.
+'2naefOs1Les5FbK+XyA09UgFgY929nNwozi4CqMJOO7VGZ4XEXfdfntlCl50GXbtYwF2TUNAWV0m7u7xu73Nj+cgy/ePC/0M4nyg'.
+'GM7bO3sFES37I8ABKizJzVcABuLq9S546WoW5LY40KbRBFwY8XDtDsfo7bcIA3ohibCLN6rQCcH5RSjFpLqWpD7+XLRgO23tnMvZ'.
+'BcR9H+IJq3fiESmZWBbnilDlCKPe2X5QJA==';
+$fp = fopen('data://text/plain;base64,' . $data, 'r');
+stream_filter_append($fp, 'zlib.inflate', STREAM_FILTER_READ);
+var_dump(fread($fp,1));
+var_dump(fread($fp,1));
+fclose($fp);
+echo "Done.\n";
+--EXPECT--
+string(0) ""
+string(0) ""
+Done.

Property changes on: ext\zlib\tests\bug_52944.phpt
___________________________________________________________________
Added: svn:mime-type
   + text/plain
Added: svn:keywords
   + Id Rev Revision Date LastChangedDate LastChangedRevision Author LastChangedBy HeadURL URL
Added: svn:eol-style
   + native

Index: ext/zlib/zlib_filter.c
===================================================================
--- ext/zlib/zlib_filter.c	(revision 303758)
+++ ext/zlib/zlib_filter.c	(working copy)
@@ -105,6 +105,9 @@
 			} else if (status != Z_OK) {
 				/* Something bad happened */
 				php_stream_bucket_delref(bucket TSRMLS_CC);
+				/* reset these because despite the error the filter may be used again */
+				data->strm.next_in = data->inbuf;
+				data->strm.avail_in = 0;
 				return PSFS_ERR_FATAL;
 			}
 			desired -= data->strm.avail_in; /* desired becomes what we consumed this round through */
 
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Last updated: Fri Apr 18 13:02:15 2014 UTC