ksmbd: Prevent integer overflow in calculation of deadtime

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commit a93ff74282 upstream.

The user can set any value for 'deadtime'. This affects the arithmetic
expression 'req->deadtime * SMB_ECHO_INTERVAL', which is subject to
overflow. The added check makes the server behavior more predictable.

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

Fixes: 0626e6641f ("cifsd: add server handler for central processing and tranport layers")
Cc: stable@vger.kernel.org
Signed-off-by: Denis Arefev <arefev@swemel.ru>
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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Denis Arefev 2025-04-09 12:04:49 +03:00 • committed by Greg Kroah-Hartman

parent d5b554bc8d

commit 817fbb8957

1 changed files with 6 additions and 1 deletions

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fs/smb/server/transport_ipc.c

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