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cifs: add missing return value check for cifs_sb_tlink

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Whenever a tlink is obtained by cifs_sb_tlink, we need
to check that the tlink returned is not an error.
It was missing with the last change here.

Fixes: b3edef6b9c ("cifs: allow dumping keys for directories too")
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Shyam Prasad N <sprasad@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Shyam Prasad N 2023-07-26 17:02:11 +00:00 committed by Steve French
parent 1982655821
commit a171eb5cac
1 changed files with 5 additions and 0 deletions
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5
fs/smb/client/ioctl.c
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@ -478,6 +478,11 @@ long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg)
}
cifs_sb = CIFS_SB(inode->i_sb);
tlink = cifs_sb_tlink(cifs_sb);
if (IS_ERR(tlink)) {
rc = PTR_ERR(tlink);
break;
}
tcon = tlink_tcon(tlink);
rc = cifs_dump_full_key(tcon, (void __user *)arg);
cifs_put_tlink(tlink);