Date: Thu, 27 Feb 2003 00:43:27 -0800 (PST) From: Hartmut Brandt <harti@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/kern kern_condvar.c kern_synch.c Message-ID: <200302270843.h1R8hRaI061026@repoman.freebsd.org>
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harti 2003/02/27 00:43:27 PST
Modified files:
sys/kern kern_condvar.c kern_synch.c
Log:
When a process has been waiting on a condition variable or mutex the
td_wmesg field in the thread structure points to the description string of
the condition variable or mutex. If the condvar or the mutex had been
initialized from a loadable module that was unloaded in the meantime,
td_wmesg may now point to invalid memory. Retrieving the process table now
may panic the kernel (or access junk). Setting the td_wmesg field to NULL
after unblocking on the condvar/mutex prevents this panic.
PR: kern/47408
Approved by: jake (mentor)
Revision Changes Path
1.37 +1 -0 src/sys/kern/kern_condvar.c
1.213 +2 -0 src/sys/kern/kern_synch.c
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