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| author | vcrhonek <vcrhonek@fedoraproject.org> | 2007-12-17 15:39:39 +0000 |
|---|---|---|
| committer | vcrhonek <vcrhonek@fedoraproject.org> | 2007-12-17 15:39:39 +0000 |
| commit | d38a411beb42dddc59ebddad0f67d76680afbca6 (patch) | |
| tree | b69310930590c7a0408d5b8ecd8d7489dcfaf0c7 /m4-1.4.10-snprintf.patch | |
| parent | 02d59253efabe90affa8194fb5b5808ba86dc877 (diff) | |
| download | m4-1_4_10-2_fc9.tar.gz m4-1_4_10-2_fc9.tar.xz m4-1_4_10-2_fc9.zip | |
fix vasnprintf puts %%n into a writeable format string in all casesm4-1_4_10-2_fc9
Diffstat (limited to 'm4-1.4.10-snprintf.patch')
| -rw-r--r-- | m4-1.4.10-snprintf.patch | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/m4-1.4.10-snprintf.patch b/m4-1.4.10-snprintf.patch new file mode 100644 index 0000000..29f86bb --- /dev/null +++ b/m4-1.4.10-snprintf.patch @@ -0,0 +1,25 @@ +--- m4-1.4.10/lib/vasnprintf.c_old 2007-07-05 13:48:27.000000000 +0200 ++++ m4-1.4.10/lib/vasnprintf.c 2007-12-13 13:38:39.000000000 +0100 +@@ -3385,10 +3385,22 @@ + #endif + *fbp = dp->conversion; + #if USE_SNPRINTF ++#if !(__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)) + fbp[1] = '%'; + fbp[2] = 'n'; + fbp[3] = '\0'; + #else ++ /* On glibc2 systems from glibc >= 2.3 - probably also older ++ ones - we know that snprintf's returns value conforms to ++ ISO C 99: the gl_SNPRINTF_DIRECTIVE_N test passes. ++ Therefore we can avoid using %n in this situation. ++ On glibc2 systems from 2004-10-18 or newer, the use of %n ++ in format strings in writable memory may crash the program ++ (if compiled with _FORTIFY_SOURCE=2), so we should avoid it ++ in this situation. */ ++ fbp[1] = '\0'; ++#endif ++#else + fbp[1] = '\0'; + #endif + |