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vfs: forbid write access when reading a file into memory
This patch is based on top of the "vfs: support for a common kernel file loader" patch set. In general when the kernel is reading a file into memory it does not want anything else writing to it. The kernel currently only forbids write access to a file being executed. This patch extends this locking to files being read by the kernel. Changelog: - moved function to kernel_read_file() - Mimi - updated patch description - Mimi Signed-off-by: Dmitry Kasatkin <[email protected]> Cc: Al Viro <[email protected]> Signed-off-by: Mimi Zohar <[email protected]> Reviewed-by: Luis R. Rodriguez <[email protected]> Acked-by: Kees Cook <[email protected]>
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