rpmbuild can start processing random memory when processing the value
provided by XZ_THREADS, and unintentionally disable encoding for a
file descriptor that in fact requires encoding to be enabled in order
for lzwrite() to actually create an rpm.
*** Fdopen(0x7f2030002b30,w6T16.xzdio) | fdio 23 fp (nil)
==> lzopen_internal("w6T16", 23, 1)
==> lzopen_internal set encoding
==> lzopen_internal clear encoding
==> Fdopen(0x7f2030002b30,"w6T16.xzdio") returns fd 0x7f2030002b30 |
xzdio 0x7f2030004e30 fp 23 | fdio -1 fp (nil)
==> lzwrite(0x7f2030004e30, 0x7f20789d8070, 6) encoding 0
==> Fwrite(0x7f2030002b30,0x7f20789d8070,6) rc -1 | xzdio
0x7f2030004e30 fp 23 | fdio -1 fp (nil)
error: create archive failed: cpio: write
When the encoding bit gets cleared on the LZFILE* struct, lzwrite() then
rightfully complains when it detects !lzfile->encoding, which then gets
bubbled up as a write failure when we go to create the archive.
This fix is available in the rpm 4.17-release.
Upstream-Status: Backport
[https://github.com/rpm-software-management/rpm/commit/405fc8998181353bd510864ca251dc233afec276]
---
..._internal-mode-parsing-when-Tn-is-us.patch | 31 +++++++++++++++++++
meta/recipes-devtools/rpm/rpm_4.14.2.1.bb | 1 +
2 files changed, 32 insertions(+)
create mode 100644
meta/recipes-devtools/rpm/files/0001-rpmio-Fix-lzopen_internal-mode-parsing-when-Tn-is-us.patch
diff --git
a/meta/recipes-devtools/rpm/files/0001-rpmio-Fix-lzopen_internal-mode-parsing-when-Tn-is-us.patch
b/meta/recipes-devtools/rpm/files/0001-rpmio-Fix-lzopen_internal-mode-parsing-when-Tn-is-us.patch
new file mode 100644
index 0000000000..52110fa2b1
--- /dev/null
+++
b/meta/recipes-devtools/rpm/files/0001-rpmio-Fix-lzopen_internal-mode-parsing-when-Tn-is-us.patch
@@ -0,0 +1,31 @@
+From 405fc8998181353bd510864ca251dc233afec276 Mon Sep 17 00:00:00 2001
+From: Vitaly Chikunov <[email protected]>
+Date: Wed, 6 Jan 2021 23:43:41 +0300
+Subject: [PATCH] rpmio: Fix lzopen_internal mode parsing when 'Tn' is used
+
+When there is number after "T" (suggested number of threads or "0" for
+getncpus), lzopen_internal() mode parser would skip one byte, and when
+it's at the end of the string it would then parse undesired garbage from
+the memory, making intermittent compression failures.
+
+Fixes: 7740d1098 ("Add support for multithreaded xz compression")
+Signed-off-by: Vitaly Chikunov <[email protected]>
+---
+ rpmio/rpmio.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/rpmio/rpmio.c b/rpmio/rpmio.c
+index ed1e25140..9d32ec6d9 100644
+--- a/rpmio/rpmio.c
++++ b/rpmio/rpmio.c
+@@ -798,6 +798,7 @@ static LZFILE *lzopen_internal(const char *mode, int fd,
int xz)
+ * should've processed
+ * */
+ while (isdigit(*++mode));
++ --mode;
+ }
+ #ifdef HAVE_LZMA_MT
+ else
+--
+2.25.1
+
diff --git a/meta/recipes-devtools/rpm/rpm_4.14.2.1.bb
b/meta/recipes-devtools/rpm/rpm_4.14.2.1.bb
index c39a5208e5..376021d913 100644
--- a/meta/recipes-devtools/rpm/rpm_4.14.2.1.bb
+++ b/meta/recipes-devtools/rpm/rpm_4.14.2.1.bb
@@ -44,6 +44,7 @@ SRC_URI =
"git://github.com/rpm-software-management/rpm;branch=rpm-4.14.x;protoc
file://0001-mono-find-provides-requires-do-not-use-monodis-from-.patch \
file://0001-Rip-out-partial-support-for-unused-MD2-and-RIPEMD160.patch \
file://0001-rpmplugins.c-call-dlerror-prior-to-dlsym.patch \
+
file://0001-rpmio-Fix-lzopen_internal-mode-parsing-when-Tn-is-us.patch \
file://CVE-2021-3421.patch \
file://CVE-2021-20266.patch \
"
--
2.25.1
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