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authorPeng Tao <bergwolf@gmail.com>2011-09-22 21:50:16 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2011-10-18 09:08:14 -0700
commite6d05a757c314ad88d0649d3835a8a1daa964236 (patch)
treef900bf7912f5eb2546769f19fdfacccbc36e6b59 /fs
parent9b7eecdcfeb943f130d86bbc249fde4994b6fe30 (diff)
pnfsblock: fix NULL pointer dereference
bl_add_page_to_bio returns error pointer. bio should be reset to NULL in failure cases as the out path always calls bl_submit_bio. Signed-off-by: Peng Tao <peng_tao@emc.com> Signed-off-by: Jim Rees <rees@umich.edu> Cc: stable@kernel.org [3.0] Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/nfs/blocklayout/blocklayout.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/nfs/blocklayout/blocklayout.c b/fs/nfs/blocklayout/blocklayout.c
index 2167ba2afdb..4ddbfbf1c3a 100644
--- a/fs/nfs/blocklayout/blocklayout.c
+++ b/fs/nfs/blocklayout/blocklayout.c
@@ -292,6 +292,7 @@ bl_read_pagelist(struct nfs_read_data *rdata)
bl_end_io_read, par);
if (IS_ERR(bio)) {
rdata->pnfs_error = PTR_ERR(bio);
+ bio = NULL;
goto out;
}
}
@@ -581,6 +582,7 @@ fill_invalid_ext:
bl_end_io_write_zero, par);
if (IS_ERR(bio)) {
wdata->pnfs_error = PTR_ERR(bio);
+ bio = NULL;
goto out;
}
/* FIXME: This should be done in bi_end_io */
@@ -629,6 +631,7 @@ next_page:
bl_end_io_write, par);
if (IS_ERR(bio)) {
wdata->pnfs_error = PTR_ERR(bio);
+ bio = NULL;
goto out;
}
isect += PAGE_CACHE_SECTORS;