lkml.org 
[lkml]   [2021]   [Jun]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: [PATCH] scsi: aic7xxx: Fix unintentional sign extension issue on left shift of u8
Date
On Mon, 21 Jun 2021 16:17:27 +0100, Colin King wrote:

> The shifting of the u8 integer returned fom ahc_inb(ahc, port+3) by
> 24 bits to the left will be promoted to a 32 bit signed int and then
> sign-extended to a u64. In the event that the top bit of the u8
> is set then all then all the upper 32 bits of the u64 end up as
> also being set because of the sign-extension. Fix this by
> casting the u8 values to a u64 before the 24 bit left shift.
>
> [...]

Applied to 5.14/scsi-queue, thanks!

[1/1] scsi: aic7xxx: Fix unintentional sign extension issue on left shift of u8
https://git.kernel.org/mkp/scsi/c/332a9dd1d86f

--
Martin K. Petersen Oracle Linux Engineering

\
 
 \ /
  Last update: 2021-06-29 06:10    [W:0.047 / U:1.020 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site