diff mbox series

[4/7] ksmbd: use locks_inode_context helper

Message ID 20221116151726.129217-5-jlayton@kernel.org
State New
Headers show
Series fs: fix inode->i_flctx accesses | expand

Commit Message

Jeff Layton Nov. 16, 2022, 3:17 p.m. UTC 
ksmbd currently doesn't access i_flctx safely. This requires a
smp_load_acquire, as the pointer is set via cmpxchg (a release
operation).

Cc: Namjae Jeon <linkinjeon@kernel.org>
Cc: Steve French <sfrench@samba.org>
Signed-off-by: Jeff Layton <jlayton@kernel.org>
---
 fs/ksmbd/vfs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Namjae Jeon Nov. 16, 2022, 11:45 p.m. UTC | #1 
2022-11-17 0:17 GMT+09:00, Jeff Layton <jlayton@kernel.org>:
> ksmbd currently doesn't access i_flctx safely. This requires a
> smp_load_acquire, as the pointer is set via cmpxchg (a release
> operation).
>
> Cc: Namjae Jeon <linkinjeon@kernel.org>
> Cc: Steve French <sfrench@samba.org>
> Signed-off-by: Jeff Layton <jlayton@kernel.org>
Acked-by: Namjae Jeon <linkinjeon@kernel.org>

Thanks for your patch!
diff mbox series

Patch

diff --git a/fs/ksmbd/vfs.c b/fs/ksmbd/vfs.c
index 8de970d6146f..f9e85d6a160e 100644
--- a/fs/ksmbd/vfs.c
+++ b/fs/ksmbd/vfs.c
@@ -321,7 +321,7 @@  static int check_lock_range(struct file *filp, loff_t start, loff_t end,
 			    unsigned char type)
 {
 	struct file_lock *flock;
-	struct file_lock_context *ctx = file_inode(filp)->i_flctx;
+	struct file_lock_context *ctx = locks_inode_context(file_inode(filp));
 	int error = 0;
 
 	if (!ctx || list_empty_careful(&ctx->flc_posix))