diff options
| author | Christoph Hellwig <hch@infradead.org> | 2011-05-11 15:04:11 +0000 |
|---|---|---|
| committer | Alex Elder <aelder@sgi.com> | 2011-05-25 10:48:37 -0500 |
| commit | 87bef1812d337beadfb1099e7361fd41264eb88e (patch) | |
| tree | 707b3c2a623b4fc80ce790bb61bd5262d9396821 | |
| parent | ab1908a5bb21a8eebf16e5d92d087fd9413cf67d (diff) | |
| download | linux-87bef1812d337beadfb1099e7361fd41264eb88e.tar.bz2 | |
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 <hch@lst.de>
Reviewed-by: Lachlan McIlroy <lmcilroy@redhat.com>
Signed-off-by: Alex Elder <aelder@sgi.com>
| -rw-r--r-- | fs/xfs/xfs_inode.c | 8 |
1 files changed, 6 insertions, 2 deletions
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; |