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ANDROID: keychord: Check for write data size
authorSuren Baghdasaryan <surenb@google.com>
Fri, 2 Mar 2018 00:35:31 +0000 (16:35 -0800)
committerSuren Baghdasaryan <surenb@google.com>
Fri, 2 Mar 2018 19:12:59 +0000 (19:12 +0000)
commit855ea747806b2e31b844d6fdacd97e0a836be207
tree1ed0661ac896076f88bdd109e55e887d1e270270tree | snapshot
parent024f962d4b2458ee814a6b0bb1027e3504cf7b74commit | diff
ANDROID: keychord: Check for write data size

keychord driver causes a kernel warning when writing more than
(1 << (MAX_ORDER - 1)) * PAGE_SIZE bytes to /dev/keychord.
In reality writes to this file should be much smaller, so
limiting data size to PAGE_SIZE seems to be appropriate.
This change checks write data size and if it's more than
PAGE_SIZE causes write to fail.

Bug: 73962978

Change-Id: I8a064a396d4259ffca924fa35d80e9700c4f8d79
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
drivers/input/misc/keychord.c diff | blob | history
Mirror: https://github.com/0ranko0P/kernel_xiaomi_msm8998/
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