Re: setfsuid on ext2 weirdness (2.4)

[Alan Cox]

> 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 ?

>