ksmbd: validate zero num_subauth before sub_auth is accessed

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commit bf21e29d78 upstream.

Access psid->sub_auth[psid->num_subauth - 1] without checking
if num_subauth is non-zero leads to an out-of-bounds read.
This patch adds a validation step to ensure num_subauth != 0
before sub_auth is accessed.

Cc: stable@vger.kernel.org
Signed-off-by: Norbert Szetei <norbert@doyensec.com>
Acked-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Norbert Szetei 2025-03-29 16:06:01 +00:00 • committed by Greg Kroah-Hartman

parent 596407adb9

commit 3ac65de111

1 changed files with 5 additions and 0 deletions

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fs/smb/server/smbacl.c

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