Date: Mon, 27 Nov 2000 11:04:37 +0600 (ALMT) From: Boris Popov <bp@butya.kz> To: Thomas Moestl <tmoestl@gmx.net> Cc: freebsd-hackers@freebsd.org Subject: Re: [PATCH] Fix for panics in lookup() after forced unmount Message-ID: <Pine.BSF.4.21.0011271102480.96868-100000@lion.butya.kz> In-Reply-To: <20001126190453.A1157@crow.dom2ip.de>
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On Sun, 26 Nov 2000, Thomas Moestl wrote: > Actually, the panic will occur after a simple forced unmount of the current > working directory and subsequent try to access "..". This is because the > vnode of the cwd was cleared and it's v_mount member was set to NULL. This > member is however dereferenced in the handling for the ".." special case in > lookup(), causing a panic. > The fix is rather trivial, just check the member before using it and return > an appropriate error. In the following patch, I use EBADF. > Btw, after taking a look into the OpenBSD and NetBSD repos, I think they > might have the same problem. Is there any standard channel to pass bug > reports to them from FreeBSD, or should I just use the normal submit > procedure? Good work Thomas! I think patch can be committed as is. -- Boris Popov http://www.butya.kz/~bp/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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