Messages in this thread | | | Subject | Re: [PATCH 1/2] vfs: implement fchmodat2() syscall | From | Eric Blake <> | Date | Tue, 11 Apr 2017 13:08:52 -0500 |
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On 04/11/2017 01:07 PM, Eric Blake wrote:
> > But even if using open(O_PATH)/fchmod() works, it is not immediately > obvious whether it can catch all the same cases that chmodat(O_NOFOLLOW)
Typo; I obviously meant fchmodat(AT_SYMLINK_NOFOLLOW)
> would cover, as there are cases where you have permissions to change > mode bits but not open() the file for reading or writing. And even if > it gets rid of a TOCTTOU race, it still is a 2-syscall hit rather than > an atomic single syscall. >
-- Eric Blake, Principal Software Engineer Red Hat, Inc. +1-919-301-3266 Virtualization: qemu.org | libvirt.org
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