提交 e6d05a75 编写于 作者: P Peng Tao 提交者: Trond Myklebust

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: NPeng Tao <peng_tao@emc.com>
Signed-off-by: NJim Rees <rees@umich.edu>
Cc: stable@kernel.org [3.0]
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
上级 9b7eecdc
......@@ -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 @@ bl_write_pagelist(struct nfs_write_data *wdata, int sync)
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 @@ bl_write_pagelist(struct nfs_write_data *wdata, int sync)
bl_end_io_write, par);
if (IS_ERR(bio)) {
wdata->pnfs_error = PTR_ERR(bio);
bio = NULL;
goto out;
}
isect += PAGE_CACHE_SECTORS;
......
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