From 716a3cf317456fa01d54398bb14ab354f50ed6a2 Mon Sep 17 00:00:00 2001 From: Steve French Date: Tue, 9 May 2023 01:37:19 -0500 Subject: [PATCH] smb3: fix problem remounting a share after shutdown xfstests generic/392 showed a problem where even after a shutdown call was made on a mount, we would still attempt to use the (now inaccessible) superblock if another mount was attempted for the same share. Reported-by: David Howells Reviewed-by: David Howells Cc: Fixes: 087f757b0129 ("cifs: add shutdown support") Signed-off-by: Steve French --- fs/cifs/connect.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c index eeeed6f..8e9a672 100644 --- a/fs/cifs/connect.c +++ b/fs/cifs/connect.c @@ -2709,6 +2709,13 @@ cifs_match_super(struct super_block *sb, void *data) spin_lock(&cifs_tcp_ses_lock); cifs_sb = CIFS_SB(sb); + + /* We do not want to use a superblock that has been shutdown */ + if (CIFS_MOUNT_SHUTDOWN & cifs_sb->mnt_cifs_flags) { + spin_unlock(&cifs_tcp_ses_lock); + return 0; + } + tlink = cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); if (tlink == NULL) { /* can not match superblock if tlink were ever null */ -- 2.7.4