Bluetooth: hci_event: Fix using memcmp when comparing keys

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memcmp is not consider safe to use with cryptographic secrets:

 'Do  not  use memcmp() to compare security critical data, such as
 cryptographic secrets, because the required CPU time depends on the
 number of equal bytes.'

While usage of memcmp for ZERO_KEY may not be considered a security
critical data, it can lead to more usage of memcmp with pairing keys
which could introduce more security problems.

Fixes: 455c2ff0a5 ("Bluetooth: Fix BR/EDR out-of-band pairing with only initiator data")
Fixes: 33155c4aae ("Bluetooth: hci_event: Ignore NULL link key")
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>

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Luiz Augusto von Dentz 2023-10-05 13:59:59 -07:00

parent c7f59461f5

commit b541260615

1 changed files with 7 additions and 5 deletions

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net/bluetooth/hci_event.c

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