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MAP_FAILED overwrite unexpected in usecase

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Emil 2023-10-10 03:41:17 +00:00
parent a02b196b21
commit cc398f4746
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GPG Key ID: 5432DB986FDBCF8A
2 changed files with 1 additions and 15 deletions
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14
baked-nobloat.c
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@ -44,8 +44,6 @@ map(const char * fn, size_t * len)
{ {
*len = s.st_size; *len = s.st_size;
addr = mmap(NULL, s.st_size, PROT_READ, MAP_SHARED, fd, 0); addr = mmap(NULL, s.st_size, PROT_READ, MAP_SHARED, fd, 0);
if (addr == MAP_FAILED)
{ addr = NULL; }
} }
close(fd); close(fd);
} }
@ -76,17 +74,7 @@ find_region(const char * fn, const char * start, const char * stop)
if ((pb = find(start, addr, len, strlen(start)))) if ((pb = find(start, addr, len, strlen(start))))
{ {
pb += strlen(start); pb += strlen(start);
pe = find(stop, pb, len - (pb - addr), strlen(stop)); pe = find(stop, pb, len - (pb - addr), strlen(stop));
if (!pe)
{
pe = pb;
while (*pe && *pe != '\n')
{
if (pe[0] == '\\' && pe[1] == '\n')
{ pe += 2; }
++pe;
}
}
if (pe) if (pe)
{ buf = strndup(pb, (pe - addr) - (pb - addr)); } { buf = strndup(pb, (pe - addr) - (pb - addr)); }
} }

2
baked.c
View File

@ -62,8 +62,6 @@ map(const char * fn, size_t * len)
{ {
*len = s.st_size; *len = s.st_size;
addr = mmap(NULL, s.st_size, PROT_READ, MAP_SHARED, fd, 0); addr = mmap(NULL, s.st_size, PROT_READ, MAP_SHARED, fd, 0);
if (addr == MAP_FAILED)
{ addr = NULL; }
} }
close(fd); close(fd);
} }