Date: Mon, 21 Nov 2005 14:38:58 +0200 From: Andriy Gapon <avg@icyb.net.ua> To: freebsd-security@freebsd.org, freebsd-fs@freebsd.org Subject: mount -u -r drops nosuid ? Message-ID: <4381BFE2.80106@icyb.net.ua>
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Not sure if this is a bug or a feature, but it seems like potential security risk: I have a ufs fs mounted rw+nosuid, then I needed to downgrade it to ro, so I executed mount -u -r on it - imagine my surpise when I found that nosuid flag was removed as well. I know I could have used mount -u -r -o nosuid, but the present behavior seems to be non-obvious (update one flag, orthogonal flags dropped as well) and dangerously so. System is 5.4-RELEASE-p3 i386 -- Andriy Gapon
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