netfilter: ipt_CLUSTERIP: fix out-of-bounds accesses in clusterip_tg_check()

[pandora-kernel.git] / fs / xfs / xfs_buf.c

diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c
index cf0ac05..2f5a8f7 100644 (file)
--- a/fs/xfs/xfs_buf.c
+++ b/fs/xfs/xfs_buf.c
@@ -1167,9 +1167,14 @@ xfs_buf_bio_end_io(
 {
        xfs_buf_t               *bp = (xfs_buf_t *)bio->bi_private;
 
-       xfs_buf_ioerror(bp, -error);
+       /*
+        * don't overwrite existing errors - otherwise we can lose errors on
+        * buffers that require multiple bios to complete.
+        */
+       if (!bp->b_error)
+               xfs_buf_ioerror(bp, -error);
 
-       if (!error && xfs_buf_is_vmapped(bp) && (bp->b_flags & XBF_READ))
+       if (!bp->b_error && xfs_buf_is_vmapped(bp) && (bp->b_flags & XBF_READ))
                invalidate_kernel_vmap_range(bp->b_addr, xfs_buf_vmap_len(bp));
 
        _xfs_buf_ioend(bp, 1);
@@ -1245,6 +1250,11 @@ next_chunk:
                if (size)
                        goto next_chunk;
        } else {
+               /*
+                * This is guaranteed not to be the last io reference count
+                * because the caller (xfs_buf_iorequest) holds a count itself.
+                */
+               atomic_dec(&bp->b_io_remaining);
                xfs_buf_ioerror(bp, EIO);
                bio_put(bio);
        }