On Tue, Dec 30, 2014 at 01:42:03PM +0100, Christian Hesse wrote: > Mohammad_AlSaleh <ce.mohammad.alsaleh@xxxxxxxxx> on Tue, 2014/12/30 14:36: > > Hello. > > > > I just came across some weird behavior. > > > > A small testcase: > > > > cd /tmp # should be tmpfs > > touch tfile > > ln -s tfile tlink > > cat tlink > > > > When cat executes, it returns with success(0). But, if cat is executed > > as root, it fails with a permission denied error. > > > > What's really happening is, the open() syscall fails with EACCESS when > > the file is a symlink in a tmpfs-mounted dir. But only fails when run > > as root! > > > > I'm assuming this is a bug. Can anyone confirm it? > > This is expected as /tmp has the sticky bit set. > > https://wiki.ubuntu.com/Security/Features#Symlink_restrictions Aha. Thanks for the info. > -- > main(a){char*c=/* Schoene Gruesse */"B?IJj;MEH" > "CX:;",b;for(a/* Chris get my mail address: */=0;b=c[a++];) > putchar(b-1/(/* gcc -o sig sig.c && ./sig */b/42*2-3)*42);}
