From: Christoph Hellwig Date: Wed, 11 May 2011 15:04:11 +0000 (+0000) Subject: xfs: check for valid indices in xfs_iext_get_ext and xfs_iext_idx_to_irec X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=87bef1812d337beadfb1099e7361fd41264eb88e;p=linux-beck.git xfs: check for valid indices in xfs_iext_get_ext and xfs_iext_idx_to_irec Based on an earlier patch from Lachlan McIlroy. Signed-off-by: Christoph Hellwig Reviewed-by: Lachlan McIlroy Signed-off-by: Alex Elder --- diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c index 6f318eeac401..b71a907e15ab 100644 --- a/fs/xfs/xfs_inode.c +++ b/fs/xfs/xfs_inode.c @@ -3108,6 +3108,8 @@ xfs_iext_get_ext( xfs_extnum_t idx) /* index of target extent */ { ASSERT(idx >= 0); + ASSERT(idx < ifp->if_bytes / sizeof(xfs_bmbt_rec_t)); + if ((ifp->if_flags & XFS_IFEXTIREC) && (idx == 0)) { return ifp->if_u1.if_ext_irec->er_extbuf; } else if (ifp->if_flags & XFS_IFEXTIREC) { @@ -3881,8 +3883,10 @@ xfs_iext_idx_to_irec( xfs_extnum_t page_idx = *idxp; /* extent index in target list */ ASSERT(ifp->if_flags & XFS_IFEXTIREC); - ASSERT(page_idx >= 0 && page_idx <= - ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t)); + ASSERT(page_idx >= 0); + ASSERT(page_idx <= ifp->if_bytes / sizeof(xfs_bmbt_rec_t)); + ASSERT(page_idx < ifp->if_bytes / sizeof(xfs_bmbt_rec_t) || realloc); + nlists = ifp->if_real_bytes / XFS_IEXT_BUFSZ; erp_idx = 0; low = 0;