* [PATCH][CIFS] missing null check for newinode pointer
@ 2021-06-23 1:03 Steve French
2021-06-23 11:15 ` Sachin Prabhu
0 siblings, 1 reply; 2+ messages in thread
From: Steve French @ 2021-06-23 1:03 UTC (permalink / raw)
To: CIFS
[-- Attachment #1: Type: text/plain, Size: 797 bytes --]
in cifs_do_create we check if newinode is valid before referencing it
but are missing the check in one place in fs/cifs/dir.c
Addresses-Coverity: 1357292 ("Dereference after null check")
Signed-off-by: Steve French <stfrench@microsoft.com>
---
fs/cifs/dir.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index 912333082b18..aca6ed58cc44 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -384,10 +384,11 @@ cifs_do_create(struct inode *inode, struct
dentry *direntry, unsigned int xid,
goto out_err;
}
- if (S_ISDIR(newinode->i_mode)) {
- rc = -EISDIR;
- goto out_err;
- }
+ if (newinode)
+ if (S_ISDIR(newinode->i_mode)) {
+ rc = -EISDIR;
+ goto out_err;
+ }
d_drop(direntry);
d_add(direntry, newinode);
--
Thanks,
Steve
[-- Attachment #2: 0001-cifs-missing-null-check-for-newinode-pointer.patch --]
[-- Type: text/x-patch, Size: 1017 bytes --]
From 8252c0bc73cad73a8f4f76e90c2381ee34ffbc0f Mon Sep 17 00:00:00 2001
From: Steve French <stfrench@microsoft.com>
Date: Tue, 22 Jun 2021 19:53:08 -0500
Subject: [PATCH] cifs: missing null check for newinode pointer
in cifs_do_create we check if newinode is valid before referencing it
but are missing the check in one place in fs/cifs/dir.c
Addresses-Coverity: 1357292 ("Dereference after null check")
Signed-off-by: Steve French <stfrench@microsoft.com>
---
fs/cifs/dir.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index 912333082b18..aca6ed58cc44 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -384,10 +384,11 @@ cifs_do_create(struct inode *inode, struct dentry *direntry, unsigned int xid,
goto out_err;
}
- if (S_ISDIR(newinode->i_mode)) {
- rc = -EISDIR;
- goto out_err;
- }
+ if (newinode)
+ if (S_ISDIR(newinode->i_mode)) {
+ rc = -EISDIR;
+ goto out_err;
+ }
d_drop(direntry);
d_add(direntry, newinode);
--
2.30.2
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH][CIFS] missing null check for newinode pointer
2021-06-23 1:03 [PATCH][CIFS] missing null check for newinode pointer Steve French
@ 2021-06-23 11:15 ` Sachin Prabhu
0 siblings, 0 replies; 2+ messages in thread
From: Sachin Prabhu @ 2021-06-23 11:15 UTC (permalink / raw)
To: Steve French; +Cc: CIFS
Acked-by: Sachin Prabhu <sprabhu@redhat.com>
On Wed, Jun 23, 2021 at 2:04 AM Steve French <smfrench@gmail.com> wrote:
>
> in cifs_do_create we check if newinode is valid before referencing it
> but are missing the check in one place in fs/cifs/dir.c
>
> Addresses-Coverity: 1357292 ("Dereference after null check")
> Signed-off-by: Steve French <stfrench@microsoft.com>
> ---
> fs/cifs/dir.c | 9 +++++----
> 1 file changed, 5 insertions(+), 4 deletions(-)
>
> diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
> index 912333082b18..aca6ed58cc44 100644
> --- a/fs/cifs/dir.c
> +++ b/fs/cifs/dir.c
> @@ -384,10 +384,11 @@ cifs_do_create(struct inode *inode, struct
> dentry *direntry, unsigned int xid,
> goto out_err;
> }
>
> - if (S_ISDIR(newinode->i_mode)) {
> - rc = -EISDIR;
> - goto out_err;
> - }
> + if (newinode)
> + if (S_ISDIR(newinode->i_mode)) {
> + rc = -EISDIR;
> + goto out_err;
> + }
>
> d_drop(direntry);
> d_add(direntry, newinode);
>
> --
> Thanks,
>
> Steve
^ permalink raw reply [flat|nested] 2+ messages in thread
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