smb: clear the aes_cmac_key and aes_cmac_ctx when done

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Clear the local crypto-related structures via __cleanup() functions
when we're done with them to avoid that sensitive data could leak on
the stack.

Note: cmac_ctx in ksmbd_sign_smb3_pdu() gets cleared in aes_cmac_final()
already, so this does not need a __cleanup() marker.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Acked-by: Namjae Jeon <linkinjeon@kernel.org>
Link: https://patch.msgid.link/20260807125845.1477067-3-thuth@redhat.com
Signed-off-by: Eric Biggers <ebiggers@kernel.org>

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Thomas Huth 2026-08-07 14:58:39 +02:00 • committed by Eric Biggers

parent adbc4db2c0

commit 2b240733f2

2 changed files with 3 additions and 3 deletions

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4

fs/smb/client/smb2transport.c

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2

fs/smb/server/auth.c

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