This patchset is fixing some aspects of the ring buffer implementation in drivers/hid/hid-debug.c. This implementation has certain problem points: - it may stuck in an infinite loop - it may return corrupted data - a reader and a writer are not protected by spinlocks, which can lead to the corrupted data The suggested patchset is a new ring buffer implementation which overwrites the oldest data in case of an overflow. One can verify the suggested ring buffer implementation by fuzzing it with modified kernel and fuzzer-reader at: https://gist.github.com/nefigtut/33d56e3870b67493cc867344aed2a062 Vladis Dronov (3): HID: debug: avoid infinite loop and corrupting data HID: debug: provide reader-writer locking for the ring buffer HID: debug: fix ring buffer implementation drivers/hid/hid-debug.c | 201 ++++++++++++++++++++++++++------------ include/linux/hid-debug.h | 1 + 2 files changed, 142 insertions(+), 60 deletions(-) -- 2.19.0
