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Yamin Friedman f06d0ca458 linux/dim: Fix overflow in dim calculation 
While using net_dim, a dim_sample was used without ever initializing the
comps value. Added use of DIV_ROUND_DOWN_ULL() to prevent potential
overflow, it should not be a problem to save the final result in an int
because after the division by epms the value should not be larger than a
few thousand.

[ 1040.127124] UBSAN: Undefined behaviour in lib/dim/dim.c:78:23
[ 1040.130118] signed integer overflow:
[ 1040.131643] 134718714 * 100 cannot be represented in type 'int'

Fixes: 398c2b05bb ("linux/dim: Add completions count to dim_sample")
Signed-off-by: Yamin Friedman <yaminf@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Acked-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-07-25 11:34:39 -07:00
..
dim.c linux/dim: Fix overflow in dim calculation 2019-07-25 11:34:39 -07:00
Makefile linux/dim: Implement RDMA adaptive moderation (DIM) 2019-07-08 16:37:21 -03:00
net_dim.c linux/dim: Move implementation to .c files 2019-06-25 13:46:39 -07:00
rdma_dim.c linux/dim: Implement RDMA adaptive moderation (DIM) 2019-07-08 16:37:21 -03:00