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https://github.com/Divested-Mobile/DivestOS-Build.git
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54 lines
2.1 KiB
Diff
54 lines
2.1 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Almaz Mingaleev <mingaleev@google.com>
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Date: Wed, 10 Jul 2024 13:38:35 +0100
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Subject: [PATCH] Do not accept zip files with invalid headers.
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According to Section 4.3.6 in [1] non-empty zip file starts with
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local file header. 4.3.1 allows empty files, and in such case
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file starts with "end of central directory record".
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This aligns ZipFile with libziparchive modulo empty zip files -
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libziparchive rejects them.
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Tests are skipped because sc-dev branch uses ART module
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prebuilts, but builds tests from sources which leads to presubmit
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failures.
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Ignore-AOSP-First: b/309938635#comment1
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[1] https://pkwaredownloads.blob.core.windows.net/pem/APPNOTE.txt
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Bug: 309938635
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Test: CtsLibcoreTestCases
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Test: CtsLibcoreOjTestCases
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(cherry picked from commit 288a44a1817707110cdf5a3a6ef8377c6e10cce2)
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(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:43e428a99aa89a9dfbe93000171721ecbfc31b88)
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Merged-In: I545cdd49ec3cc138331145f4716c8148662a478b
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Change-Id: I545cdd49ec3cc138331145f4716c8148662a478b
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---
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ojluni/src/main/native/zip_util.c | 11 +++++++++++
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1 file changed, 11 insertions(+)
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diff --git a/ojluni/src/main/native/zip_util.c b/ojluni/src/main/native/zip_util.c
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index 6c02d2bc73b..475be3afd9d 100644
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--- a/ojluni/src/main/native/zip_util.c
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+++ b/ojluni/src/main/native/zip_util.c
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@@ -878,6 +878,17 @@ ZIP_Put_In_Cache0(const char *name, ZFILE zfd, char **pmsg, jlong lastModified,
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zip->locsig = JNI_TRUE;
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else
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zip->locsig = JNI_FALSE;
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+
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+ // BEGIN Android-changed: do not accept files with invalid header.
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+ if (GETSIG(errbuf) != LOCSIG && GETSIG(errbuf) != ENDSIG) {
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+ if (pmsg) {
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+ *pmsg = strdup("Entry at offset zero has invalid LFH signature.");
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+ }
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+ ZFILE_Close(zfd);
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+ freeZip(zip);
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+ return NULL;
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+ }
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+ // END Android-changed: do not accept files with invalid header.
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}
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// This lseek is safe because it happens during construction of the ZipFile
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