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Postings from December 2013
On Sat Nov 23 14:16:48 2013, bulk88 wrote: > > Posting a patch to this problem for comments/review. The idea is to > tag sockets handles with a special low 2 bits pattern. The kernel > ignores the last 2 bits of all handles, so the only meaning the low 2 > bits have are on a user-mode (that includes kernel32.dll) level. 2 > closesocket calls are necessary to avoid a leak in ws2_32.dll's socket > descriptor to winsock provider vtable hash table. I'm not 100% sure > that this won't create another race like #118059 fixed. This patch > breaks non-IFS/non-kernel handle socket provider protocols even harder > than before. Before=Perl already calls dup/dup2 on socket handles, > which calls DuplicateHandle in the CRT, if the socket handle isn't a > kernel handle (but a user mode pointer), that causes breakage. Also I > assume Perl's sysread/syswrite/buffered IO calls also won't work on > non-kernel socket handles, I think I've seen a ticket about that > somewhere on RT before. Perl may have had support for doing recv > instead of read() on sockets in the past, but I might be imagining it, > will need to research. > Bump. -- bulk88 ~ bulk88 at hotmail.com --- via perlbug: queue: perl5 status: open https://rt.perl.org/Ticket/Display.html?id=118127Thread Previous