sctp: integer overflow in sctp_auth_create_key() · mariux64/linux@a5e5c37 · GitHub

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sctp: integer overflow in sctp_auth_create_key()

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The previous commit 30c2235 is incomplete and cannot prevent integer
overflows. For example, when key_len is 0x80000000 (INT_MAX + 1), the
left-hand side of the check, (INT_MAX - key_len), which is unsigned,
becomes 0xffffffff (UINT_MAX) and bypasses the check.

Signed-off-by: Xi Wang <xi.wang@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Xi Wang authored and David S. Miller committed Nov 29, 2011

1 parent 2a38e6d commit a5e5c37