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Bug 1569560 - (CVE-2017-18261) CVE-2017-18261 kernel: Infinite recursion in arch/arm64/include/asm/arch_timer.h:arch_timer_reg_read_stable macro allows local users to cause denial of service
CVE-2017-18261 kernel: Infinite recursion in arch/arm64/include/asm/arch_time...
Status: CLOSED NOTABUG
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20170810,repor...
: Security
Depends On:
Blocks: 1569569
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Reported: 2018-04-19 09:50 EDT by Adam Mariš
Modified: 2018-04-23 10:22 EDT (History)
44 users (show)

See Also:
Fixed In Version: kernel 4.13
Doc Type: If docs needed, set a value
Doc Text:
The arch_timer_reg_read_stable macro in arch/arm64/include/asm/arch_timer.h in the Linux kernel, before 4.13, allows local users to cause a denial of service (infinite recursion) by writing to a file under /sys/kernel/debug in certain circumstances, as demonstrated by a scenario involving debugfs, ftrace, PREEMPT_TRACER, and FUNCTION_GRAPH_TRACER.
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Clone Of:
Environment:
Last Closed: 2018-04-23 10:22:42 EDT
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Regression: ---
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CRM:
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
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Description Adam Mariš 2018-04-19 09:50:51 EDT 
The arch_timer_reg_read_stable macro in arch/arm64/include/asm/arch_timer.h in the Linux kernel before 4.13 allows local users to cause a denial of service (infinite recursion) by writing to a file under /sys/kernel/debug in certain circumstances, as demonstrated by a scenario involving debugfs, ftrace, PREEMPT_TRACER, and FUNCTION_GRAPH_TRACER.

Upstream fix:

https://github.com/torvalds/linux/commit/adb4f11e0a8f4e29900adb2b7af28b6bbd5c1fa4

Introduced by:

https://github.com/torvalds/linux/commit/6acc71ccac7187fc0ef85f10bd09c2058f21fab5
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