Race condition in the ext4_file_write_iter function in fs/ext4/file.c
in the Linux kernel through 3.17 allows local users to cause a denial
of service (file unavailability) via a combination of a write action
and an F_SETFL fcntl operation for the O_DIRECT flag.
Note:References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MLIST:[linux-ext4] 20141009 [PATCH] add aio/dio regression test race between write and fcntl
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