Message ID | 20240402193404.236159-5-pc@manguebit.com |
---|---|
State | New |
Headers | show
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ORIGINATING; auth=pass smtp.mailfrom=pc@manguebit.com ARC-Seal: i=1; s=dkim; d=manguebit.com; t=1712086487; a=rsa-sha256; cv=none; b=HuJZ8zgrT+/AIQM59ISxG/QPFPWCag/q3eRNUSvcrnJUZlmpRVpT2hpVYrPKerfHrbUbj7 LUJv94CSANpNl4SoWpkrdMtmg2jtUIeEhfC9ZhqaazAgB8OH2y+4p2x6GxgZ2358co2VpY FCj1H37kbmtMyrPTfvIrZ3jsaG4jaaJ8eHpHMx0+W5sNIXtAbYPYkiyYKJfcIsMhiAFmlX 8KtBZnH9vNDIMzykMkI7dsMl0pyZf0nDKVJnhyG3lKekYABDzD/V9jWZdlWDKBNSQxLXDQ MmNPVSlN/AxbEmFuwF/HZsuvf+zYY+g+l3WspkYnOajXjHHQ/svesfZm7bhC7A== To: smfrench@gmail.com Cc: linux-cifs@vger.kernel.org, Paulo Alcantara <pc@manguebit.com> Subject: [PATCH 05/12] smb: client: fix potential UAF in smb2_check_message() Date: Tue, 2 Apr 2024 16:33:57 -0300 Message-ID: <20240402193404.236159-5-pc@manguebit.com> In-Reply-To: <20240402193404.236159-1-pc@manguebit.com> References: <20240402193404.236159-1-pc@manguebit.com> Precedence: bulk X-Mailing-List: linux-cifs@vger.kernel.org List-Id: <linux-cifs.vger.kernel.org> List-Subscribe: <mailto:linux-cifs+subscribe@vger.kernel.org> List-Unsubscribe: <mailto:linux-cifs+unsubscribe@vger.kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit |
Series |
[01/12] smb: client: fix potential UAF in cifs_debug_files_proc_show()
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diff --git a/fs/smb/client/smb2misc.c b/fs/smb/client/smb2misc.c index 82b84a4941dd..14d74ef70cc8 100644 --- a/fs/smb/client/smb2misc.c +++ b/fs/smb/client/smb2misc.c @@ -160,7 +160,8 @@ smb2_check_message(char *buf, unsigned int len, struct TCP_Server_Info *server) /* decrypt frame now that it is completely read in */ spin_lock(&cifs_tcp_ses_lock); list_for_each_entry(iter, &pserver->smb_ses_list, smb_ses_list) { - if (iter->Suid == le64_to_cpu(thdr->SessionId)) { + if (!cifs_ses_exiting(iter) && + iter->Suid == le64_to_cpu(thdr->SessionId)) { ses = iter; break; }
Skip sessions that are being teared down (status == SES_EXITING) to avoid UAF. Signed-off-by: Paulo Alcantara (Red Hat) <pc@manguebit.com> --- fs/smb/client/smb2misc.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)