From: Paulo Alcantara pc@manguebit.com
[ Upstream commit 12c30f33cc6769bf411088a2872843c4f9ea32f9 ]
This fixes the following warning reported by kernel test robot
fs/smb/client/cifsfs.c:982 cifs_smb3_do_mount() warn: possible memory leak of 'cifs_sb'
Link: https://lore.kernel.org/all/202306170124.CtQqzf0I-lkp@intel.com/ Signed-off-by: Paulo Alcantara (SUSE) pc@manguebit.com Signed-off-by: Steve French stfrench@microsoft.com Signed-off-by: Sasha Levin sashal@kernel.org --- fs/smb/client/cifsfs.c | 28 ++++++++++------------------ 1 file changed, 10 insertions(+), 18 deletions(-)
diff --git a/fs/smb/client/cifsfs.c b/fs/smb/client/cifsfs.c index 078df1e2dd18a..18d66497c42d1 100644 --- a/fs/smb/client/cifsfs.c +++ b/fs/smb/client/cifsfs.c @@ -883,11 +883,11 @@ struct dentry * cifs_smb3_do_mount(struct file_system_type *fs_type, int flags, struct smb3_fs_context *old_ctx) { - int rc; - struct super_block *sb = NULL; - struct cifs_sb_info *cifs_sb = NULL; struct cifs_mnt_data mnt_data; + struct cifs_sb_info *cifs_sb; + struct super_block *sb; struct dentry *root; + int rc;
/* * Prints in Kernel / CIFS log the attempted mount operation @@ -898,11 +898,9 @@ cifs_smb3_do_mount(struct file_system_type *fs_type, else cifs_info("Attempting to mount %s\n", old_ctx->UNC);
- cifs_sb = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL); - if (cifs_sb == NULL) { - root = ERR_PTR(-ENOMEM); - goto out; - } + cifs_sb = kzalloc(sizeof(*cifs_sb), GFP_KERNEL); + if (!cifs_sb) + return ERR_PTR(-ENOMEM);
cifs_sb->ctx = kzalloc(sizeof(struct smb3_fs_context), GFP_KERNEL); if (!cifs_sb->ctx) { @@ -945,10 +943,8 @@ cifs_smb3_do_mount(struct file_system_type *fs_type,
sb = sget(fs_type, cifs_match_super, cifs_set_super, flags, &mnt_data); if (IS_ERR(sb)) { - root = ERR_CAST(sb); cifs_umount(cifs_sb); - cifs_sb = NULL; - goto out; + return ERR_CAST(sb); }
if (sb->s_root) { @@ -979,13 +975,9 @@ cifs_smb3_do_mount(struct file_system_type *fs_type, deactivate_locked_super(sb); return root; out: - if (cifs_sb) { - if (!sb || IS_ERR(sb)) { /* otherwise kill_sb will handle */ - kfree(cifs_sb->prepath); - smb3_cleanup_fs_context(cifs_sb->ctx); - kfree(cifs_sb); - } - } + kfree(cifs_sb->prepath); + smb3_cleanup_fs_context(cifs_sb->ctx); + kfree(cifs_sb); return root; }