Mimi Zohar b44a7dfc6f
vfs: define a generic function to read a file from the kernel ...
For a while it was looked down upon to directly read files from Linux.
These days there exists a few mechanisms in the kernel that do just
this though to load a file into a local buffer. There are minor but
important checks differences on each. This patch set is the first
attempt at resolving some of these differences.
This patch introduces a common function for reading files from the kernel
with the corresponding security post-read hook and function.
Changelog v4+:
- export security_kernel_post_read_file() - Fengguang Wu
v3:
- additional bounds checking - Luis
v2:
- To simplify patch review, re-ordered patches
Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com >
Reviewed-by: Luis R. Rodriguez <mcgrof@suse.com >
Acked-by: Kees Cook <keescook@chromium.org >
Cc: Al Viro <viro@zeniv.linux.org.uk >
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Mimi Zohar
b44a7dfc6f