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authorVasiliy Kulikov <segoon@openwall.com>2011-06-24 16:08:38 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2011-06-28 09:39:11 -0700
commit1d1221f375c94ef961ba8574ac4f85c8870ddd51 (patch)
tree1e05f1c33bef03a88745c55ac9891b8423ae1795 /fs/proc/Makefile
parentb0af8dfdd67699e25083478c63eedef2e72ebd85 (diff)
proc: restrict access to /proc/PID/io
/proc/PID/io may be used for gathering private information. E.g. for openssh and vsftpd daemons wchars/rchars may be used to learn the precise password length. Restrict it to processes being able to ptrace the target process. ptrace_may_access() is needed to prevent keeping open file descriptor of "io" file, executing setuid binary and gathering io information of the setuid'ed process. Signed-off-by: Vasiliy Kulikov <segoon@openwall.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/proc/Makefile')
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