staging/lustre/libcfs: Properly handle debugfs read- and write-only files

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It turns out that unlike procfs, debugfs does not really enforce
permissions for root (similar to regular filesystems), so we need
to ensure we are not providing ->write() method to read-only files
and ->read() method for write-only files at registration.

This fixes a couple of crashes on unexpected access.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Oleg Drokin 2016-02-06 02:01:50 -05:00 • committed by Greg Kroah-Hartman

parent 5ba907a949

commit 49a76d7040

1 changed files with 25 additions and 2 deletions

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drivers/staging/lustre/lustre/libcfs/module.c

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