linux-kernel - [PATCH 0/2] cifs: fix integer overflow in match

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Message-ID: <20250331082251.123381-1-r.smirnov@omp.ru>
Date: Mon, 31 Mar 2025 11:22:48 +0300
From: Roman Smirnov <r.smirnov@....ru>
To: Steve French <sfrench@...ba.org>, Paulo Alcantara <pc@...guebit.com>,
	Ronnie Sahlberg <ronniesahlberg@...il.com>, Shyam Prasad N
	<sprasad@...rosoft.com>, Tom Talpey <tom@...pey.com>, Bharath SM
	<bharathsm@...rosoft.com>
CC: Roman Smirnov <r.smirnov@....ru>, Sachin Prabhu <sprabhu@...hat.com>,
	Shirish Pargaonkar <shirishpargaonkar@...il.com>,
	<linux-cifs@...r.kernel.org>, <samba-technical@...ts.samba.org>,
	<linux-kernel@...r.kernel.org>, <lvc-project@...uxtesting.org>
Subject: [PATCH 0/2] cifs: fix integer overflow in match_server()

If a large number is written to echo_interval during mount,
an integer overflow may occur in match_server():

smb3_fs_context_parse_param()

cifs_smb3_do_mount()
  sget()
    cifs_match_super()
      match_server()

Found by Linux Verification Center (linuxtesting.org) with Svace.

Roman Smirnov (2):
  cifs: fix integer overflow in match_server()
  cifs: remove unreachable code in cifs_get_tcp_session()

 fs/smb/client/connect.c    | 6 +-----
 fs/smb/client/fs_context.c | 5 +++++
 2 files changed, 6 insertions(+), 5 deletions(-)

-- 
2.34.1