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| author | hobbs <hobbs> | 2003-05-10 23:54:36 (GMT) |
|---|---|---|
| committer | hobbs <hobbs> | 2003-05-10 23:54:36 (GMT) |
| commit | f8bf014b0e9ca3daa0b74976d8e1ae3b4f352f0d (patch) | |
| tree | cd126df644cf9164f94cf00050e2ddf55774b5e9 | |
| parent | c7de598ebebdc47b22753ee9839854204a45e725 (diff) | |
| download | tcl-f8bf014b0e9ca3daa0b74976d8e1ae3b4f352f0d.zip tcl-f8bf014b0e9ca3daa0b74976d8e1ae3b4f352f0d.tar.gz tcl-f8bf014b0e9ca3daa0b74976d8e1ae3b4f352f0d.tar.bz2 | |
* generic/tclCmdMZ.c (Tcl_StringObjCmd): prevent string repeat
crash when overflow sizes were given (throws error). [Bug #714106]
| -rw-r--r-- | ChangeLog | 5 | ||||
| -rw-r--r-- | generic/tclCmdMZ.c | 11 |
2 files changed, 15 insertions, 1 deletions
@@ -1,3 +1,8 @@ +2003-05-10 Jeff Hobbs <jeffh@ActiveState.com> + + * generic/tclCmdMZ.c (Tcl_StringObjCmd): prevent string repeat + crash when overflow sizes were given (throws error). [Bug #714106] + 2003-05-09 Joe Mistachkin <joe@mistachkin.com> * generic/tclThreadAlloc.c (TclFreeAllocCache): Fixed memory leak diff --git a/generic/tclCmdMZ.c b/generic/tclCmdMZ.c index 0716793..6a2915f 100644 --- a/generic/tclCmdMZ.c +++ b/generic/tclCmdMZ.c @@ -14,7 +14,7 @@ * See the file "license.terms" for information on usage and redistribution * of this file, and for a DISCLAIMER OF ALL WARRANTIES. * - * RCS: @(#) $Id: tclCmdMZ.c,v 1.89 2003/05/09 13:08:19 dkf Exp $ + * RCS: @(#) $Id: tclCmdMZ.c,v 1.90 2003/05/10 23:54:37 hobbs Exp $ */ #include "tclInt.h" @@ -2180,8 +2180,17 @@ Tcl_StringObjCmd(dummy, interp, objc, objv) * Only build up a string that has data. Instead of * building it up with repeated appends, we just allocate * the necessary space once and copy the string value in. + * Check for overflow with back-division. [Bug #714106] */ length2 = length1 * count; + if ((length2 / count) != length1) { + char buf[TCL_INTEGER_SPACE+1]; + sprintf(buf, "%d", INT_MAX); + Tcl_AppendStringsToObj(resultPtr, + "string size overflow, must be less than ", + buf, (char *) NULL); + return TCL_ERROR; + } /* * Include space for the NULL */ |