Hi! > > > I'm seeing this on RHEL6.7 kernel, I haven't tried latest upstream yet. > > > > Ah, you are right, the memory is not touched in the write_null() > > function at all. > > Right, I got confused by "access_ok(VERIFY_READ, buf, count)" > in vfs_write(), but after reading code and comments it's clear it > only checks if range _may_ be valid: > * access_ok: - Checks if a user space pointer is valid > ... > * Returns true (nonzero) if the memory block may be valid, false (zero) > * if it is definitely invalid. > * > * Note that, depending on architecture, this function probably just > * checks that the pointer is in the user space range - after calling > * this function, memory access functions may still return -EFAULT.
I do not have further questions. Acked. -- Cyril Hrubis chru...@suse.cz ------------------------------------------------------------------------------ Monitor Your Dynamic Infrastructure at Any Scale With Datadog! Get real-time metrics from all of your servers, apps and tools in one place. SourceForge users - Click here to start your Free Trial of Datadog now! http://pubads.g.doubleclick.net/gampad/clk?id=241902991&iu=/4140 _______________________________________________ Ltp-list mailing list Ltp-list@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/ltp-list
