mm/shmem.c in the Linux kernel through 3.15.1 does not...
Moderate severity
Unreviewed
Published
May 14, 2022
to the GitHub Advisory Database
•
Updated Feb 2, 2023
Description
Published by the National Vulnerability Database
Jun 23, 2014
Published to the GitHub Advisory Database
May 14, 2022
Last updated
Feb 2, 2023
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.
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