Haiku/buildtools
1
0
Fork 0
mirror of https://review.haiku-os.org/buildtools synced 2024-11-23 07:18:49 +01:00
Code Issues Actions Packages Projects Releases Wiki Activity

Increase MAXSYM and add sanity checks.

Browse Source 
I had jam crash in strange ways because a stack-allocatted aray was
overflowing. Double the limit, and add sanity checks with exit and clear
error messages in case it happens again.
This commit is contained in:
Adrien Destugues 2017-07-16 19:40:50 +02:00
parent 560f4f562f
commit 259af3cf06
5 changed files with 33 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
jam/builtins.c
View File

@ -305,6 +305,10 @@ builtin_match(
{
char buf[ MAXSYM ];
int l = re->endp[i] - re->startp[i];
if (l > MAXSYM) {
printf("MAXSYM is too low! NEed at least %d\n", l);
exit(-1);
}
memcpy( buf, re->startp[i], l );
buf[ l ] = 0;
result = list_new( result, buf, 0 );

8
jam/expand.c
View File

@ -206,6 +206,10 @@ var_expand(
/* Look for a : modifier in the variable name */
/* Must copy into varname so we can modify it */
if (strlen(vars->string) > MAXSYM) {
printf("MAXSYM is too low! Need at least %d\n", l);
exit(-1);
}
strcpy( varname, vars->string );
if( colon = strchr( varname, MAGIC_COLON ) )
@ -274,6 +278,10 @@ var_expand(
LIST *rem;
char *out1;
if (out - out_buf > MAXSYM) {
printf("MAXSYM is too low!\n");
exit(-1);
}
/* Handle end subscript (length actually) */
if( sub2 >= 0 && --sub2 < 0 )

4
jam/headers.c
View File

@ -129,6 +129,10 @@ headers1(
char buf2[ MAXSYM ];
int l = re[i]->endp[1] - re[i]->startp[1];
if (l > MAXSYM) {
printf("MAXSYM is too low! Need at least %d\n", l);
exit(-1);
}
memcpy( buf2, re[i]->startp[1], l );
buf2[ l ] = 0;
result = list_new( result, buf2, 0 );

2
jam/jam.h
View File

@ -478,7 +478,7 @@
/* You probably don't need to muck with these. */
# define MAXSYM 1024 /* longest symbol in the environment */
# define MAXSYM 2048 /* longest symbol in the environment */
# define MAXJPATH 1024 /* longest filename */
# define MAXJOBS 64 /* silently enforce -j limit */

4
jam/variable.c
View File

@ -117,6 +117,10 @@ var_defines( const char **e )
/* Get name */
if (val - *e > MAXSYM) {
printf("MAXSYM is too low, need at least %d\n", val - *e);
exit(-1);
}
strncpy( buf, *e, val - *e );
buf[ val - *e ] = '\0';