Bug 1903283 - kernel: race condition between coredump operations and the IORING_OP_MADVISE implementation
Summary: kernel: race condition between coredump operations and the IORING_OP_MADVISE ...
Keywords:
Status: CLOSED DUPLICATE of bug 1874535
Alias: None
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1903284
Blocks: 1903285
TreeView+ depends on / blocked
 
Reported: 2020-12-01 18:42 UTC by Guilherme de Almeida Suckevicz
Modified: 2020-12-10 12:44 UTC (History)
41 users (show)

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Last Closed: 2020-12-10 12:44:02 UTC
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Description Guilherme de Almeida Suckevicz 2020-12-01 18:42:54 UTC 
An issue was discovered in do_madvise in mm/madvise.c in the Linux kernel before 5.6.8. There is a race condition between coredump operations and the IORING_OP_MADVISE implementation.

Reference:
https://bugs.chromium.org/p/project-zero/issues/detail?id=2029

Upstream patch:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=bc0c4d1e176eeb614dc8734fc3ace34292771f11
Comment 1 Justin M. Forbes 2020-12-02 14:24:45 UTC 
This was fixed for Fedora with the 5.6.8 stable kernel updates.
Comment 2 Petr Matousek 2020-12-10 12:44:35 UTC 

*** This bug has been marked as a duplicate of bug 1874535 ***
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