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Adding patch from upstream to fix a buffer overrun in zcat (Closes: #902936).

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Signed-off-by: Daniel Baumann <daniel@debian.org>
This commit is contained in:
Daniel Baumann 2025-02-24 05:56:36 +01:00
parent 02253dcc96
commit b8f7808d57
Signed by: daniel
GPG key ID: FBB4F0E80A80222F
2 changed files with 19 additions and 0 deletions
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1
debian/patches/series vendored
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@ -1,2 +1,3 @@
debian/0001-build.patch debian/0001-build.patch
debian/0002-zupdate.patch debian/0002-zupdate.patch
upstream/0001-zcat-buffer-overrun.patch

18
debian/patches/upstream/0001-zcat-buffer-overrun.patch vendored Normal file
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@ -0,0 +1,18 @@
Author: Antonio Diaz Diaz <antonio@gnu.org>
Description: zcat.cc: Fixed a buffer overrun on outbuf when '-v' is used.
diff -Naurp zutils/zcat.cc zutils/zcat.cc
--- zutils/zcat.cc
+++ zutils/zcat.cc
@@ -232,8 +232,9 @@ int cat( int infd, const int format_inde
enum { buffer_size = 4096 };
// buffer with space for sentinel newline at the end
uint8_t * const inbuf = new uint8_t[buffer_size+1];
- // buffer with space for character quoting and 255-digit line number
- uint8_t * const outbuf = new uint8_t[(4*buffer_size)+256];
+ // buffer with space for character quoting, 255-digit line number and
+ // worst case flushing respect to inbuf.
+ uint8_t * const outbuf = new uint8_t[(5*buffer_size)+256];
int retval = 0;
Children children;
if( !set_data_feeder( input_filename, &infd, children, format_index ) )