random: zero buffer after reading entropy from userspace

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This buffer may contain entropic data that shouldn't stick around longer
than needed, so zero out the temporary buffer at the end of write_pool().

Reviewed-by: Dominik Brodowski <linux@dominikbrodowski.net>
Reviewed-by: Jann Horn <jannh@google.com>
Reviewed-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

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Jason A. Donenfeld 2022-02-09 18:42:13 +01:00

parent 434537ae54

commit 7b5164fb12

1 changed files with 8 additions and 3 deletions

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11

drivers/char/random.c

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