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cifs: Fix connections leak when tlink setup failed

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If the tlink setup failed, lost to put the connections, then
the module refcnt leak since the cifsd kthread not exit.

Also leak the fscache info, and for next mount with fsc, it will
print the follow errors:
  CIFS: Cache volume key already in use (cifs,127.0.0.1:445,TEST)

Let's check the result of tlink setup, and do some cleanup.

Fixes: 56c762eb9b ("cifs: Refactor out cifs_mount()")
Reviewed-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Signed-off-by: Zhang Xiaoxu <zhangxiaoxu5@huawei.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Zhang Xiaoxu 2022-11-11 15:12:12 +08:00 committed by Steve French
parent f0c4d9fc9c
commit 1dcdf5f5b2
1 changed files with 11 additions and 3 deletions
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14
fs/cifs/connect.c
View file

@ -3855,9 +3855,13 @@ int cifs_mount(struct cifs_sb_info *cifs_sb, struct smb3_fs_context *ctx)
uuid_copy(&cifs_sb->dfs_mount_id, &mnt_ctx.mount_id);
out:
free_xid(mnt_ctx.xid);
cifs_try_adding_channels(cifs_sb, mnt_ctx.ses);
return mount_setup_tlink(cifs_sb, mnt_ctx.ses, mnt_ctx.tcon);
rc = mount_setup_tlink(cifs_sb, mnt_ctx.ses, mnt_ctx.tcon);
if (rc)
goto error;
free_xid(mnt_ctx.xid);
return rc;
error:
dfs_cache_put_refsrv_sessions(&mnt_ctx.mount_id);
@ -3884,8 +3888,12 @@ int cifs_mount(struct cifs_sb_info *cifs_sb, struct smb3_fs_context *ctx)
goto error;
}
rc = mount_setup_tlink(cifs_sb, mnt_ctx.ses, mnt_ctx.tcon);
if (rc)
goto error;
free_xid(mnt_ctx.xid);
return mount_setup_tlink(cifs_sb, mnt_ctx.ses, mnt_ctx.tcon);
return rc;
error:
mount_put_conns(&mnt_ctx);