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Date: Mon, 3 Sep 2012 20:35:15 +0200 From: Andi Kleen <andi@...stfloor.org> To: Trond.Myklebust@...app.com, linux-kernel@...r.kernel.org Subject: [PATCH] Fix memset in NFS zap caches Fix memset in nfs_zap_caches_locked This memset overruns the buffer by 4 bytes on 64bit systems. gcc 4.8 correct complains: /backup/lsrc/git/linux-lto-2.6/fs/nfs/inode.c: In function 'nfs_zap_caches_locked': /backup/lsrc/git/linux-lto-2.6/fs/nfs/inode.c:157:41: warning: argument to 'sizeof' in 'memset' call is the same pointer type '__be32 *' as the destination; expected '__be32' or an explicit length [-Wsizeof-pointer-memaccess] memset(NFS_COOKIEVERF(inode), 0, sizeof(NFS_COOKIEVERF(inode))); ^ Add a * to sizeof the correct type. Signed-off-by: Andi Kleen <ak@...ux.intel.com> diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c index c6e895f..69e7f0f 100644 --- a/fs/nfs/inode.c +++ b/fs/nfs/inode.c @@ -154,7 +154,7 @@ static void nfs_zap_caches_locked(struct inode *inode) nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); nfsi->attrtimeo_timestamp = jiffies; - memset(NFS_COOKIEVERF(inode), 0, sizeof(NFS_COOKIEVERF(inode))); + memset(NFS_COOKIEVERF(inode), 0, sizeof(*NFS_COOKIEVERF(inode))); if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; else -- ak@...ux.intel.com -- Speaking for myself only. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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