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Bug 516146 (CVE-2014-4171) - Kernel: mm/shmem: denial of service (CVE-2014-4171)
Summary: Kernel: mm/shmem: denial of service (CVE-2014-4171)
Status: CONFIRMED
Alias: CVE-2014-4171
Product: Gentoo Security
Classification: Unclassified
Component: Kernel (show other bugs)
Hardware: All Linux
: Normal normal (vote)
Assignee: Gentoo Kernel Security
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2014-07-03 09:27 UTC by Agostino Sarubbo
Modified: 2016-12-07 04:28 UTC (History)
1 user (show)

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Runtime testing required: ---


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Description Agostino Sarubbo gentoo-dev 2014-07-03 09:27:50 UTC
CVE-2014-4171 (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2014-4171):
  mm/shmem.c in the Linux kernel through 3.15.1 does not properly implement 
  the interaction between range notification and hole punching, which allows 
  local users to cause a denial of service (i_mutex hold) by using the mmap 
  system call to access a hole, as demonstrated by interfering with intended 
  shmem activity by blocking completion of (1) an MADV_REMOVE madvise call 
  or (2) an FALLOC_FL_PUNCH_HOLE fallocate call.
Comment 1 GLSAMaker/CVETool Bot gentoo-dev 2014-08-10 21:51:33 UTC
CVE-2014-4171 (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2014-4171):
  mm/shmem.c in the Linux kernel through 3.15.1 does not properly implement
  the interaction between range notification and hole punching, which allows
  local users to cause a denial of service (i_mutex hold) by using the mmap
  system call to access a hole, as demonstrated by interfering with intended
  shmem activity by blocking completion of (1) an MADV_REMOVE madvise call or
  (2) an FALLOC_FL_PUNCH_HOLE fallocate call.