Bug 1834862 (CVE-2020-12771) - CVE-2020-12771 kernel: deadlock if a coalescing operation fails in btree_gc_coalesce function in drivers/md/bcache/btree.c
Summary: CVE-2020-12771 kernel: deadlock if a coalescing operation fails in btree_gc_c...
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2020-12771
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1834865
Blocks: 1834864
TreeView+ depends on / blocked
 
Reported: 2020-05-12 14:44 UTC by Guilherme de Almeida Suckevicz
Modified: 2020-10-08 18:56 UTC (History)
47 users (show)

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Last Closed: 2020-05-14 12:24:58 UTC
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Description Guilherme de Almeida Suckevicz 2020-05-12 14:44:56 UTC 
An issue was discovered in the Linux kernel through 5.6.11. btree_gc_coalesce in drivers/md/bcache/btree.c has a deadlock if a coalescing operation fails.

Reference:
https://lkml.org/lkml/2020/4/26/87
Comment 1 Guilherme de Almeida Suckevicz 2020-05-12 14:46:47 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1834865]
Comment 3 Justin M. Forbes 2020-10-08 18:56:03 UTC 
This was fixed for Fedora with the 5.7.6 stable kernel updates.
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