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7b27c85ed9
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.
(From OE-Core rev: b093005d31467d89b00af621f86eb5cac7f845af)
Signed-off-by: Kyle Russell <bkylerussell@gmail.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>