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pnfsblock: fix NULL pointer dereference

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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>
This commit is contained in:
Peng Tao 2011-09-22 21:50:16 -04:00 committed by Trond Myklebust
parent 9b7eecdcfe
commit e6d05a757c
1 changed files with 3 additions and 0 deletions
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3
fs/nfs/blocklayout/blocklayout.c
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@ -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;