Date: Thu, 6 Dec 2007 06:04:02 +0000 (UTC) From: Daniel Eischen <deischen@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/lib/libkse/thread thr_kern.c Message-ID: <200712060604.lB6642Tk056035@repoman.freebsd.org>
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deischen 2007-12-06 06:04:02 UTC
FreeBSD src repository
Modified files:
lib/libkse/thread thr_kern.c
Log:
Set the tcb (thread control block) in the child process after a fork.
This protects against a race with an upcall in the parent during the
fork which can clobber the parent's tcb before the vm space is copied
in the child. The child then gets a corrupted tcb that is either null
or that points to another thread that doesn't exist in the child (after
a fork, only the fork()ing thread exists in the child).
Reported by: Arno J. Klaassen (arno at heho / snv / jussieu / fr)
Revision Changes Path
1.128 +13 -0 src/lib/libkse/thread/thr_kern.c
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