From 5fb282ba4fef8985a5acf2b32681f2ec07732561 Mon Sep 17 00:00:00 2001 From: Marios Makassikis Date: Wed, 13 Mar 2024 15:11:38 +0100 Subject: ksmbd: fix possible null-deref in smb_lazy_parent_lease_break_close rcu_dereference can return NULL, so make sure we check against that. Signed-off-by: Marios Makassikis Acked-by: Namjae Jeon Signed-off-by: Steve French --- fs/smb/server/oplock.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'fs/smb') diff --git a/fs/smb/server/oplock.c b/fs/smb/server/oplock.c index 9af5fd68bd85..b30ff8b9777d 100644 --- a/fs/smb/server/oplock.c +++ b/fs/smb/server/oplock.c @@ -1143,7 +1143,7 @@ void smb_lazy_parent_lease_break_close(struct ksmbd_file *fp) opinfo = rcu_dereference(fp->f_opinfo); rcu_read_unlock(); - if (!opinfo->is_lease || opinfo->o_lease->version != 2) + if (!opinfo || !opinfo->is_lease || opinfo->o_lease->version != 2) return; p_ci = ksmbd_inode_lookup_lock(fp->filp->f_path.dentry->d_parent); -- cgit v1.2.3