From: Paulo Alcantara pc@manguebit.com
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 [ cifs_debug.c was moved from fs/cifs to fs/smb/client since 38c8a9a52082 ("smb: move client and server files to common directory fs/smb"). The cifs_ses_exiting() was introduced to cifs_debug.c since ca545b7f0823 ("smb: client: fix potential UAF in cifs_debug_files_proc_show()") which has been sent to upstream already.] Signed-off-by: Jianqi Ren jianqi.ren.cn@windriver.com Signed-off-by: He Zhe zhe.he@windriver.com --- Verified the build test --- fs/cifs/cifs_debug.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/fs/cifs/cifs_debug.c b/fs/cifs/cifs_debug.c index 8b88b0705481..257eae4673d2 100644 --- a/fs/cifs/cifs_debug.c +++ b/fs/cifs/cifs_debug.c @@ -593,6 +593,8 @@ static int cifs_stats_proc_show(struct seq_file *m, void *v) list_for_each(tmp2, &server->smb_ses_list) { ses = list_entry(tmp2, struct cifs_ses, smb_ses_list); + if (cifs_ses_exiting(ses)) + continue; list_for_each(tmp3, &ses->tcon_list) { tcon = list_entry(tmp3, struct cifs_tcon,