Re: sys_chroot+sys_fchdir Fix

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Serge E. Hallyn wrote:
Quoting David Newall ([email protected]):
Serge E. Hallyn wrote:
Quoting David Newall ([email protected]):
It might be tidy if pivot_root could be used (instead of a hack based on a chroot bug), but it'd still be unportable.
It can.

Please re-read my previous msg.
I read it. Currently pivot_root can't be used to affect a single process.

No.  If you unshare your mounts namespace immediately before pivot_root,
then pivot_root will only affect that single process.

Bugger. You're right, I didn't read your previous message; I thought I had but I was wrong.

	unshare(CLONE_NEWNS);
	chdir(new_dir);
	pivot_root(new_dir, oldroot);


After further RTFMing, and assuming "any processes or threads which use the old root directory" means what you imply, and surely it does, then I agree: pivot_root already does the job. Does anybody still need to use a bug in chroot?
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]
  Powered by Linux