Re: setfsuid on ext2 weirdness (2.4)

From: Alan Cox (alan@lxorguk.ukuu.org.uk)
Date: Mon Jan 08 2001 - 06:02:09 EST


> Ok.. I'm going bananas. It could be a 4am braindeath or a rh7.0 bungholio
> but this is annoying:

There are lots of corner cases in the kernel that are probably a bit off

> main(int argc, char **argv)
> {
> int fd;
> setfsuid(atoi(argv[1]));
> fd = open("/etc/passwd", O_RDONLY);
> printf("got fd %d\n", fd);
> }
>
> [root@wizball /root]# ./setfstest 0
> got fd 3

(root)

> [root@wizball /root]# ./setfstest 500
> got fd 3

(fsuid==euid)

> [root@wizball /root]# ./setfstest 501
> got fd -1

(other)

perchance. If so does being uid 501 flip the behaviour around ?

>

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This archive was generated by hypermail 2b29 : Mon Jan 15 2001 - 21:00:16 EST