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smb: client: fix potential UAF in cifs_stats_proc_show()

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commit 0865ffefea197b437ba78b5dd8d8e256253efd65 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>
This commit is contained in:
Paulo Alcantara 2024-04-02 16:33:56 -03:00 committed by Greg Kroah-Hartman
parent cf03020c56
commit c3cf8b74c5
1 changed files with 2 additions and 0 deletions
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2
fs/smb/client/cifs_debug.c
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@ -736,6 +736,8 @@ static int cifs_stats_proc_show(struct seq_file *m, void *v)
}
#endif /* 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) {
i++;
seq_printf(m, "\n%d) %s", i, tcon->tree_name);