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| author | Eric Dumazet <edumazet@google.com> | 2014-09-22 13:19:44 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-09-22 16:27:10 -0400 |
| commit | fcdd1cf4dd63aecf86c987d7f4ec7187be5c2fbc (patch) | |
| tree | 9f74f24f8fe931ffac65805a30bf7e53de7e89b1 /mm/fremap.c | |
| parent | 35f7aa5309c048bb70e58571942795fa9411ce6a (diff) | |
| download | blackbird-op-linux-fcdd1cf4dd63aecf86c987d7f4ec7187be5c2fbc.tar.gz blackbird-op-linux-fcdd1cf4dd63aecf86c987d7f4ec7187be5c2fbc.zip | |
tcp: avoid possible arithmetic overflows
icsk_rto is a 32bit field, and icsk_backoff can reach 15 by default,
or more if some sysctl (eg tcp_retries2) are changed.
Better use 64bit to perform icsk_rto << icsk_backoff operations
As Joe Perches suggested, add a helper for this.
Yuchung spotted the tcp_v4_err() case.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'mm/fremap.c')
0 files changed, 0 insertions, 0 deletions
