From: Chandra Seetharaman <sekharan@us.ibm.com>
Date: Wed, 7 Sep 2011 19:37:54 +0000 (+0000)
Subject: xfs: Check the return value of xfs_buf_get()
X-Git-Tag: firefly_0821_release~3680^2~4278^2~53
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=b522950f0ab8551f2ef56c210ebd50e6c6396601;p=firefly-linux-kernel-4.4.55.git

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>
---

diff --git a/fs/xfs/xfs_attr.c b/fs/xfs/xfs_attr.c
index 3dd5c9c374cb..c7dab0c0bdda 100644
--- a/fs/xfs/xfs_attr.c
+++ b/fs/xfs/xfs_attr.c
@@ -2109,8 +2109,8 @@ xfs_attr_rmtval_set(xfs_da_args_t *args)
 
 		bp = xfs_buf_get(mp->m_ddev_targp, dblkno, blkcnt,
 				 XBF_LOCK | XBF_DONT_BLOCK);
-		ASSERT(!xfs_buf_geterror(bp));
-
+		if (!bp)
+			return ENOMEM;
 		tmp = (valuelen < XFS_BUF_SIZE(bp)) ? valuelen :
 							XFS_BUF_SIZE(bp);
 		xfs_buf_iomove(bp, 0, tmp, src, XBRW_WRITE);
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);