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Date: Thu, 9 Feb 2006 06:46:33 -0800 From: [EMAIL PROTECTED] To: [EMAIL PROTECTED] Subject: [Bugme-new] [Bug 6036] New: mmap'ed write to socket hangs when connection remote end is broken http://bugzilla.kernel.org/show_bug.cgi?id=6036 Summary: mmap'ed write to socket hangs when connection remote end is broken Kernel Version: 2.6.14.3-grsec Status: NEW Severity: blocking Owner: [EMAIL PROTECTED] Submitter: [EMAIL PROTECTED] Most recent kernel where this bug did not occur: N/A Distribution: Debian Hardware Environment: x86_64 Software Environment: GNU/Linux Problem Description: Server hangs in write of a mmap-ed file to a socket viw a single write system call when connection is broken from client side. This causes a denial of service vulnerability in server, as client can open and hang many server instances. Steps to reproduce: Server: open socket bind listen enter accept Client: open socket connect to server Server: connection accepted Client: send() request Server: recv() request mmap a file to region Client: CTRL+C (unclean exit) Server: write (conn_fd, region, sizeof (region)); Server: hangs in write() call. CTRL+C kills it, but server should die in normal cleanup unmaintained alarm() doesn't awake or interrupt write() ------- You are receiving this mail because: ------- You are on the CC list for the bug, or are watching someone who is. - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
