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Bug 693478 (CVE-2019-15902) - <sys-kernel/gentoo-sources-{4.4.191,4.9.191,4.14.142,4.19.71}: Backporting error re-introduced Spectre vulnerability (CVE-2019-15902)
Summary: <sys-kernel/gentoo-sources-{4.4.191,4.9.191,4.14.142,4.19.71}: Backporting er...
Status: RESOLVED FIXED
Alias: CVE-2019-15902
Product: Gentoo Security
Classification: Unclassified
Component: Kernel (show other bugs)
Hardware: All Linux
: Normal normal (vote)
Assignee: Gentoo Kernel Security
URL: https://grsecurity.net/teardown_of_a_...
Whiteboard:
Keywords: STABLEREQ
Depends on:
Blocks:
 
Reported: 2019-09-04 11:05 UTC by Thomas Deutschmann (RETIRED)
Modified: 2019-11-07 20:49 UTC (History)
1 user (show)

See Also:
Package list:
sys-kernel/gentoo-sources-4.19.72 sys-kernel/gentoo-sources-4.14.143 sys-kernel/gentoo-sources-4.9.192 sys-kernel/gentoo-sources-4.4.192
Runtime testing required: ---
stable-bot: sanity-check+

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Description Thomas Deutschmann (RETIRED) gentoo-dev 2019-09-04 11:05:55 UTC 
A backporting error was discovered in the Linux stable/longterm kernel 4.4.x through 4.4.190, 4.9.x through 4.9.190, 4.14.x through 4.14.141, 4.19.x through 4.19.69, and 5.2.x through 5.2.11. Misuse of the upstream "x86/ptrace: Fix possible spectre-v1 in ptrace_get_debugreg()" commit reintroduced the Spectre vulnerability that it aimed to eliminate. This occurred because the backport process depends on cherry picking specific commits, and because two (correctly ordered) code lines were swapped.
Comment 1 Thomas Deutschmann (RETIRED) gentoo-dev 2019-09-13 00:34:47 UTC 
x86 stable
Comment 2 Agostino Sarubbo gentoo-dev 2019-09-13 09:22:22 UTC 
amd64 stable
Comment 3 Agostino Sarubbo gentoo-dev 2019-09-13 12:01:33 UTC 
ppc stable
Comment 4 Agostino Sarubbo gentoo-dev 2019-09-13 12:03:13 UTC 
ppc64 stable
Comment 5 Mikle Kolyada (RETIRED) archtester Gentoo Infrastructure gentoo-dev Security 2019-09-13 15:49:50 UTC 
arm stable
Comment 6 Ben Kohler gentoo-dev 2019-09-13 16:50:21 UTC 
sparc stable
Comment 7 Agostino Sarubbo gentoo-dev 2019-09-13 17:27:48 UTC 
ia64 stable
Comment 8 Thomas Deutschmann (RETIRED) gentoo-dev 2019-11-07 20:49:10 UTC 
alpha & hppa marked stable due to arch team timeout under kernel project policy.