[5990] in linux-scsi channel archive
PROBLEM: "bug: kernel timer added twice at c018879d" in 2.2.2
daemon@ATHENA.MIT.EDU (Victor Sologoubov)
Fri Feb 26 08:04:48 1999
From: "Victor Sologoubov" <VSologoubov@ibs.ru>
To: "linux-scsi@vger.rutgers.edu" <linux-scsi@vger.rutgers.edu>,
"linux-kernel@vger.rutgers.edu" <linux-kernel@vger.rutgers.edu>
Date: Fri, 26 Feb 1999 12:28:52 +0400
Reply-To: "Victor Sologoubov" <VSologoubov@ibs.ru>
I detected a bug in Linux kernel 2.2.2.
Description: message "bug: kernel timer added twice at c018879d"
is displayed on mounting scsi cdrom. Mount command
hangs and cannot be killed.
Investigation: investigation shows, that this message is printed
by function add_timer in file kernel/sched.c.
2.2.2 added a consistency check to this function.
System.map shows that the address c018879d belongs
to function scsi_sleep. This function is in
drivers/scsi/scsi_error.c file.
The timer, declared in this function,
is not properly initialized. Field timer.prev is not
initialized. It is used in a call
to add_timer, which misunderstands it as added twice.
Victor Sologoubov
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