Date: Thu, 24 Dec 1998 19:28:57 -0600 (CST) From: toasty@dragondata.com To: FreeBSD-gnats-submit@FreeBSD.ORG Subject: bin/9188: telnet gets stuck in ttydrain() Message-ID: <199812250128.TAA20397@shell1.dragondata.com>
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>Number: 9188 >Category: bin >Synopsis: telnet gets stuck in ttydrain() >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Thu Dec 24 17:30:00 PST 1998 >Last-Modified: >Originator: Kevin Day >Organization: DragonData Internet Services, Inc. >Release: FreeBSD 3.0-RELEASE i386 >Environment: 3.0-RELEASE system >Description: I found a telnet process sucking 100% cpu, after a user reported it. ktracing it showed: 11573 telnet CALL write(0x1,0x8058c20,0x174) 11573 telnet RET write -1 errno 5 Input/output error 11573 telnet CALL ioctl(0,TIOCSETAW,0xefbfd8c8) 11573 telnet RET ioctl -1 errno 9 Bad file descriptor 11573 telnet CALL write(0x1,0x8058c20,0x174) 11573 telnet RET write -1 errno 5 Input/output error 11573 telnet CALL ioctl(0,TIOCSETAW,0xefbfd8c8) 11573 telnet RET ioctl -1 errno 9 Bad file descriptor 11573 telnet CALL write(0x1,0x8058c20,0x174) 11573 telnet RET write -1 errno 5 Input/output error 11573 telnet CALL ioctl(0,TIOCSETAW,0xefbfd8c8) 11573 telnet RET ioctl -1 errno 9 Bad file descriptor Which appears to be in sys_bsd.c:ttydrain Perhaps that while loop should check for fatal errors rather than retrying everything? Or is this a case that it should never have gotten this far with the FD being closed? The user, without waiting for me, killed the process, so I wasn't able to get any more debugging. >How-To-Repeat: >Fix: >Audit-Trail: >Unformatted: To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-bugs" in the body of the message
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