Date: Fri, 31 Oct 2008 10:38:30 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: cvs-src-old@freebsd.org Subject: cvs commit: src/sys/compat/linux linux_emul.c Message-ID: <200810311038.m9VAcYe4023942@repoman.freebsd.org>
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kib 2008-10-31 10:38:30 UTC
FreeBSD src repository
Modified files:
sys/compat/linux linux_emul.c
Log:
SVN rev 184501 on 2008-10-31 10:38:30Z by kib
The code in linux_proc_exit() contains a race when multiple linux based
processes exits at the same time. The linux_emuldata structure is freed
but p->p_emuldata is left as a dangling pointer to the just freed memory.
The check for W_EXIT in the loop scanning the child processes isn't safe
since the state of the child process can change right afterwards. Lock
the process and check the W_EXIT before delivering signal.
Submitted by: tegge
Reviewed by: davidxu
MFC after: 1 week
Revision Changes Path
1.22 +3 -3 src/sys/compat/linux/linux_emul.c
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