6.1-stable review patch. If anyone has any objections, please let me know.
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From: Paulo Alcantara pc@manguebit.com
commit d3da25c5ac84430f89875ca7485a3828150a7e0a upstream.
Skip sessions that are being teared down (status == SES_EXITING) to avoid UAF.
Cc: stable@vger.kernel.org Signed-off-by: Paulo Alcantara (Red Hat) pc@manguebit.com Signed-off-by: Steve French stfrench@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/smb/client/cifs_debug.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/fs/smb/client/cifs_debug.c +++ b/fs/smb/client/cifs_debug.c @@ -568,6 +568,8 @@ static ssize_t cifs_stats_proc_write(str } #endif /* CONFIG_CIFS_STATS2 */ list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { + if (cifs_ses_exiting(ses)) + continue; list_for_each_entry(tcon, &ses->tcon_list, tcon_list) { atomic_set(&tcon->num_smbs_sent, 0); spin_lock(&tcon->stat_lock);