On Mon, Mar 22, 2021 at 3:20 AM Peter Smith <smithpb2...@gmail.com> wrote: > > On Sun, Mar 21, 2021 at 8:54 PM Amit Kapila <amit.kapil...@gmail.com> wrote: > > > > On Sat, Mar 20, 2021 at 12:54 PM Peter Smith <smithpb2...@gmail.com> wrote: > > > > > > PSA my patch to correct this by firstly doing a HASH_FIND, then only > > > HASH_REMOVE after we've finished using the ent. > > > > > > > Why can't we keep using HASH_REMOVE as it is but get the output (entry > > found or not) in the last parameter of hash_search API and then > > perform Assert based on that? See similar usage in reorderbuffer.c and > > rewriteheap.c. > > > > Changing the Assert doesn't do anything to fix the problem as > described, i.e. dereferencing of ent after the HASH_REMOVE. > > The real problem isn't the Assert. It's all those other usages of ent > disobeying the API rule: "(NB: in the case of the REMOVE action, the > result is a dangling pointer that shouldn't be dereferenced!)" >
Right, that is a problem. I see that your patch will fix it. Thanks. -- With Regards, Amit Kapila.
