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authorChandra Seetharaman <sekharan@us.ibm.com>2011-08-03 02:18:29 (GMT)
committerAlex Elder <aelder@sgi.com>2011-08-12 18:39:29 (GMT)
commitac4d6888b21a8be373f3e06f1d4011fbe2bbbeac (patch)
tree6a39e3be9bcf99cddc0ce0b0ed15aac794b527f8 /fs/xfs/xfs_vnodeops.c
parent9e978d8f7db1c5de7cdc6450a8ca208db3b95f84 (diff)
downloadlinux-ac4d6888b21a8be373f3e06f1d4011fbe2bbbeac.tar.xz
xfs: Check the return value of xfs_buf_read() for NULL
Check the return value of xfs_buf_read() for NULL and return ENOMEM if it is NULL. This is necessary in a few spots to avoid subsequent code blindly dereferencing the null buffer pointer. Signed-off-by: Chandra Seetharaman <sekharan@us.ibm.com> Signed-off-by: Alex Elder <aelder@sgi.com>
Diffstat (limited to 'fs/xfs/xfs_vnodeops.c')
-rw-r--r--fs/xfs/xfs_vnodeops.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c
index dd05360..2a432d0 100644
--- a/fs/xfs/xfs_vnodeops.c
+++ b/fs/xfs/xfs_vnodeops.c
@@ -83,6 +83,8 @@ xfs_readlink_bmap(
bp = xfs_buf_read(mp->m_ddev_targp, d, BTOBB(byte_cnt),
XBF_LOCK | XBF_MAPPED | XBF_DONT_BLOCK);
+ if (!bp)
+ return XFS_ERROR(ENOMEM);
error = xfs_buf_geterror(bp);
if (error) {
xfs_ioerror_alert("xfs_readlink",