On Fri, Nov 22, 2024 at 12:10:29PM +0100, David Hildenbrand wrote:
In gup_fast(), we simply do
seq = raw_read_seqcount(¤t->mm->write_protect_seq);
if (seq & 1)
return 0;
Should we be using that there as well?
if (!raw_seqcount_try_begin(¤t->mm->write_protect_seqs, seq))
return 0;
Might as well. A quick grep doesn't find me another instance of this
pattern, but does find me something 'funny' in net/netfilter/x_tables.c.
Let's pretend I didn't see that for now ... *sigh*
Want me to stick a patch like this on, or do you want to do that later,
when the dust has settled?