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Red Hat Bugzilla – Attachment 282581 Details for
Bug 415751
CVE-2007-6109 Emacs buffer overflows
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[patch]
Patch used by SuSE
emacs-22.1-format.diff (text/plain), 3.24 KB, created by
Tomas Hoger
on 2007-12-10 10:13:26 UTC
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Description:
Patch used by SuSE
Filename:
MIME Type:
Creator:
Tomas Hoger
Created:
2007-12-10 10:13:26 UTC
Size:
3.24 KB
patch
obsolete
>2007-11-15 Andreas Schwab <schwab@suse.de> > > * editfns.c (Fformat): Correctly format EMACS_INT values. > Also take precision into account when formatting an integer. > >Index: src/editfns.c >================================================================================ >--- src/editfns.c >+++ src/editfns.c >@@ -3543,8 +3543,10 @@ usage: (format STRING &rest OBJECTS) */ > precision[n+1] = 10 * precision[n+1] + *format - '0'; > } > >- if (format - this_format_start + 1 > longest_format) >- longest_format = format - this_format_start + 1; >+ /* Extra +1 for 'l' that we may need to insert into the >+ format. */ >+ if (format - this_format_start + 2 > longest_format) >+ longest_format = format - this_format_start + 2; > > if (format == end) > error ("Format string ends in middle of format specifier"); >@@ -3605,7 +3607,7 @@ usage: (format STRING &rest OBJECTS) */ > && *format != 'i' && *format != 'X' && *format != 'c') > error ("Invalid format operation %%%c", *format); > >- thissize = 30; >+ thissize = 30 + (precision[n] > 0 ? precision[n] : 0); > if (*format == 'c') > { > if (! SINGLE_BYTE_CHAR_P (XINT (args[n])) >@@ -3803,23 +3805,40 @@ usage: (format STRING &rest OBJECTS) */ > format - this_format_start); > this_format[format - this_format_start] = 0; > >- if (INTEGERP (args[n])) >+ if (format[-1] == 'e' || format[-1] == 'f' || format[-1] == 'g') >+ sprintf (p, this_format, XFLOAT_DATA (args[n])); >+ else > { >- if (format[-1] == 'd') >- sprintf (p, this_format, XINT (args[n])); >- /* Don't sign-extend for octal or hex printing. */ >+ if (sizeof (EMACS_INT) > sizeof (int) >+ && format[-1] != 'c') >+ { >+ /* Insert 'l' before format spec. */ >+ this_format[format - this_format_start] >+ = this_format[format - this_format_start - 1]; >+ this_format[format - this_format_start - 1] = 'l'; >+ this_format[format - this_format_start + 1] = 0; >+ } >+ >+ if (INTEGERP (args[n])) >+ { >+ if (format[-1] == 'c') >+ sprintf (p, this_format, (int) XINT (args[n])); >+ else if (format[-1] == 'd') >+ sprintf (p, this_format, XINT (args[n])); >+ /* Don't sign-extend for octal or hex printing. */ >+ else >+ sprintf (p, this_format, XUINT (args[n])); >+ } >+ else if (format[-1] == 'c') >+ sprintf (p, this_format, (int) XFLOAT_DATA (args[n])); >+ else if (format[-1] == 'd') >+ /* Maybe we should use "%1.0f" instead so it also works >+ for values larger than MAXINT. */ >+ sprintf (p, this_format, (EMACS_INT) XFLOAT_DATA (args[n])); > else >- sprintf (p, this_format, XUINT (args[n])); >+ /* Don't sign-extend for octal or hex printing. */ >+ sprintf (p, this_format, (EMACS_UINT) XFLOAT_DATA (args[n])); > } >- else if (format[-1] == 'e' || format[-1] == 'f' || format[-1] == 'g') >- sprintf (p, this_format, XFLOAT_DATA (args[n])); >- else if (format[-1] == 'd') >- /* Maybe we should use "%1.0f" instead so it also works >- for values larger than MAXINT. */ >- sprintf (p, this_format, (EMACS_INT) XFLOAT_DATA (args[n])); >- else >- /* Don't sign-extend for octal or hex printing. */ >- sprintf (p, this_format, (EMACS_UINT) XFLOAT_DATA (args[n])); > > if (p > buf > && multibyte
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bug 415751
: 282581