Date: Fri, 22 Mar 2013 22:40:17 +0000 (UTC) From: Kirk McKusick <mckusick@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-9@freebsd.org Subject: svn commit: r248626 - stable/9/sys/ufs/ffs Message-ID: <201303222240.r2MMeHAV064461@svn.freebsd.org>
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Author: mckusick Date: Fri Mar 22 22:40:16 2013 New Revision: 248626 URL: http://svnweb.freebsd.org/changeset/base/248626 Log: MFS of 246289: For UFS2 i_blocks is unsigned. The current "sanity" check that it has gone below zero after the blocks in its inode are freed is a no-op which the compiler fails to warn about because of the use of the DIP macro. Change the sanity check to compare the number of blocks being freed against the value i_blocks. If the number of blocks being freed exceeds i_blocks, just set i_blocks to zero. Reported by: Pedro Giffuni (pfg@) Modified: stable/9/sys/ufs/ffs/ffs_inode.c Directory Properties: stable/9/sys/ (props changed) stable/9/sys/amd64/include/xen/ (props changed) stable/9/sys/boot/ (props changed) stable/9/sys/boot/i386/efi/ (props changed) stable/9/sys/boot/ia64/efi/ (props changed) stable/9/sys/boot/ia64/ski/ (props changed) stable/9/sys/boot/powerpc/boot1.chrp/ (props changed) stable/9/sys/boot/powerpc/ofw/ (props changed) stable/9/sys/cddl/contrib/opensolaris/ (props changed) stable/9/sys/conf/ (props changed) stable/9/sys/contrib/dev/acpica/ (props changed) stable/9/sys/contrib/octeon-sdk/ (props changed) stable/9/sys/contrib/pf/ (props changed) stable/9/sys/contrib/x86emu/ (props changed) stable/9/sys/dev/ (props changed) stable/9/sys/dev/e1000/ (props changed) stable/9/sys/dev/isp/ (props changed) stable/9/sys/dev/ixgbe/ (props changed) stable/9/sys/dev/puc/ (props changed) stable/9/sys/fs/ (props changed) stable/9/sys/fs/ntfs/ (props changed) stable/9/sys/modules/ (props changed) stable/9/sys/net/ (props changed) stable/9/sys/sys/ (props changed) Modified: stable/9/sys/ufs/ffs/ffs_inode.c ============================================================================== --- stable/9/sys/ufs/ffs/ffs_inode.c Fri Mar 22 21:50:43 2013 (r248625) +++ stable/9/sys/ufs/ffs/ffs_inode.c Fri Mar 22 22:40:16 2013 (r248626) @@ -547,9 +547,9 @@ done: */ ip->i_size = length; DIP_SET(ip, i_size, length); - DIP_SET(ip, i_blocks, DIP(ip, i_blocks) - blocksreleased); - - if (DIP(ip, i_blocks) < 0) /* sanity */ + if (DIP(ip, i_blocks) >= blocksreleased) + DIP_SET(ip, i_blocks, DIP(ip, i_blocks) - blocksreleased); + else /* sanity */ DIP_SET(ip, i_blocks, 0); ip->i_flag |= IN_CHANGE; #ifdef QUOTA
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