xfs: Check the return value of xfs_buf_get()

Check the return value of xfs_buf_get() and fail appropriately.

Signed-off-by: Chandra Seetharaman <sekharan@us.ibm.com>
Signed-off-by: Alex Elder <aelder@sgi.com>

1 files changed, 20 insertions, 0 deletions

diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c
index e023f940a3dd..1c6fdeb702ff 100644
--- a/fs/xfs/xfs_fsops.c
+++ b/fs/xfs/xfs_fsops.c
@@ -194,6 +194,10 @@ xfs_growfs_data_private(
                 bp = xfs_buf_get(mp->m_ddev_targp,
                                  XFS_AG_DADDR(mp, agno, XFS_AGF_DADDR(mp)),
                                  XFS_FSS_TO_BB(mp, 1), XBF_LOCK | XBF_MAPPED);
+                if (!bp) {
+                        error = ENOMEM;
+                        goto error0;
+                }
                 agf = XFS_BUF_TO_AGF(bp);
                 memset(agf, 0, mp->m_sb.sb_sectsize);
                 agf->agf_magicnum = cpu_to_be32(XFS_AGF_MAGIC);
@@ -227,6 +231,10 @@ xfs_growfs_data_private(
                 bp = xfs_buf_get(mp->m_ddev_targp,
                                  XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)),
                                  XFS_FSS_TO_BB(mp, 1), XBF_LOCK | XBF_MAPPED);
+                if (!bp) {
+                        error = ENOMEM;
+                        goto error0;
+                }
                 agi = XFS_BUF_TO_AGI(bp);
                 memset(agi, 0, mp->m_sb.sb_sectsize);
                 agi->agi_magicnum = cpu_to_be32(XFS_AGI_MAGIC);
@@ -253,6 +261,10 @@ xfs_growfs_data_private(
                                  XFS_AGB_TO_DADDR(mp, agno, XFS_BNO_BLOCK(mp)),
                                  BTOBB(mp->m_sb.sb_blocksize),
                                  XBF_LOCK | XBF_MAPPED);
+                if (!bp) {
+                        error = ENOMEM;
+                        goto error0;
+                }
                 block = XFS_BUF_TO_BLOCK(bp);
                 memset(block, 0, mp->m_sb.sb_blocksize);
                 block->bb_magic = cpu_to_be32(XFS_ABTB_MAGIC);
@@ -276,6 +288,10 @@ xfs_growfs_data_private(
                                  XFS_AGB_TO_DADDR(mp, agno, XFS_CNT_BLOCK(mp)),
                                  BTOBB(mp->m_sb.sb_blocksize),
                                  XBF_LOCK | XBF_MAPPED);
+                if (!bp) {
+                        error = ENOMEM;
+                        goto error0;
+                }
                 block = XFS_BUF_TO_BLOCK(bp);
                 memset(block, 0, mp->m_sb.sb_blocksize);
                 block->bb_magic = cpu_to_be32(XFS_ABTC_MAGIC);
@@ -300,6 +316,10 @@ xfs_growfs_data_private(
                                  XFS_AGB_TO_DADDR(mp, agno, XFS_IBT_BLOCK(mp)),
                                  BTOBB(mp->m_sb.sb_blocksize),
                                  XBF_LOCK | XBF_MAPPED);
+                if (!bp) {
+                        error = ENOMEM;
+                        goto error0;
+                }
                 block = XFS_BUF_TO_BLOCK(bp);
                 memset(block, 0, mp->m_sb.sb_blocksize);
                 block->bb_magic = cpu_to_be32(XFS_IBT_MAGIC);