ethtool: avoiding integer overflow in ethtool_phys_id()

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[ Upstream commit 64a8f8f712 ]

The value of an arithmetic expression "n * id.data" is subject
to possible overflow due to a failure to cast operands to a larger data
type before performing arithmetic. Used macro for multiplication instead
operator for avoiding overflow.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Signed-off-by: Maxim Korotkov <korotkov.maxim.s@gmail.com>
Reviewed-by: Alexander Lobakin <alexandr.lobakin@intel.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20221122122901.22294-1-korotkov.maxim.s@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Maxim Korotkov 2022-11-22 15:29:01 +03:00 • committed by Greg Kroah-Hartman

parent e6d276dcc9

commit f299f97a8e

1 changed files with 2 additions and 1 deletions

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net/ethtool/ioctl.c

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