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tiny_libmaker: strip leading directory to avoid buffer overrun

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The arhdr.ar_name has 16 bytes.  Long object names esp. with
leading directory were causing a buffer overrun which was
detected by glibc.
This commit is contained in:
grischka 2010-12-04 16:56:58 +01:00
parent 21c2a68aa0
commit 69fe7585a2
1 changed files with 13 additions and 3 deletions
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16
win32/tools/tiny_libmaker.c
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@ -78,6 +78,7 @@ int main(int argc, char **argv)
int *afpos = NULL;
int istrlen, strpos = 0, fpos = 0, funccnt = 0, funcmax, hofs;
char afile[260], tfile[260], stmp[20];
char *file, *name;
strcpy(afile, "ar_test.a");
@ -197,9 +198,18 @@ int main(int argc, char **argv)
}
}
}
memset(&arhdro.ar_name, ' ', sizeof(arhdr.ar_name));
strcpy(arhdro.ar_name, argv[iarg]);
arhdro.ar_name[strlen(argv[iarg])] = '/';
file = argv[iarg];
for (name = strchr(file, 0);
name > file && name[-1] != '/' && name[-1] != '\\';
--name);
istrlen = strlen(name);
if (istrlen >= sizeof(arhdro.ar_name))
istrlen = sizeof(arhdro.ar_name) - 1;
memset(arhdro.ar_name, ' ', sizeof(arhdro.ar_name));
memcpy(arhdro.ar_name, name, istrlen);
arhdro.ar_name[istrlen] = '/';
sprintf(stmp, "%-10d", fsize);
memcpy(&arhdro.ar_size, stmp, 10);
fwrite(&arhdro, sizeof(arhdro), 1, fo);