Messages in this thread | | | Subject | Re: [PATCH] net: atm: Fix potential Spectre v1 vulnerabilities | From | "Gustavo A. R. Silva" <> | Date | Tue, 16 Apr 2019 23:05:54 -0500 |
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On 4/16/19 11:02 PM, David Miller wrote: > From: "Gustavo A. R. Silva" <gustavo@embeddedor.com> > Date: Mon, 15 Apr 2019 15:57:23 -0500 > >> arg is controlled by user-space, hence leading to a potential >> exploitation of the Spectre variant 1 vulnerability. >> >> This issue was detected with the help of Smatch: >> >> net/atm/lec.c:715 lec_mcast_attach() warn: potential spectre issue 'dev_lec' [r] (local cap) >> >> Fix this by sanitizing arg before using it to index dev_lec. >> >> Notice that given that speculation windows are large, the policy is >> to kill the speculation on the first load and not worry if it can be >> completed with a dependent load/store [1]. >> >> [1] https://lore.kernel.org/lkml/20180423164740.GY17484@dhcp22.suse.cz/ >> >> Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> > > Applied and queued up for -stable. >
Thank you, Dave.
-- Gustavo
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