SHA256
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0
forked from pool/coreutils
coreutils/coreutils-invalid-ids.patch

27 lines
972 B
Diff

While uid_t and gid_t are both unsigned, the values (uid_t) -1 and
(gid_t) -1 are reserved. A uid or gid argument of -1 to the chown(2)
system call means to leave the uid/gid unchanged. Catch this case
so that trying to set a uid or gid to -1 will result in an error.
Test cases:
chown 4294967295 file
chown :4294967295 file
chgrp 4294967295 file
Andreas Gruenbacher <agruen@suse.de>
Index: src/chgrp.c
===================================================================
--- src/chgrp.c.orig 2010-01-01 14:06:47.000000000 +0100
+++ src/chgrp.c 2010-05-05 14:03:28.279359192 +0200
@@ -89,7 +89,7 @@ parse_group (const char *name)
{
unsigned long int tmp;
if (! (xstrtoul (name, NULL, 10, &tmp, "") == LONGINT_OK
- && tmp <= GID_T_MAX))
+ && tmp <= GID_T_MAX && (gid_t) tmp != (gid_t) -1))
error (EXIT_FAILURE, 0, _("invalid group: %s"), quote (name));
gid = tmp;
}