Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
Input: evdev - limit amount of data for writes
Limit amount of data that can be written into an evdev instance at
a given time to 4096 bytes (170 input events) to avoid holding
evdev->mutex for too long and starving other users.
Reviewed-by: Jeff LaBundy <jeff@labundy.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Link: https://lore.kernel.org/r/Zr5L8TUzkJcB9HcF@google.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
+7
+7
drivers/input/evdev.c
+7
drivers/input/evdev.c
···
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struct input_event event;
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int retval = 0;
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/*
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* Limit amount of data we inject into the input subsystem so that
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* we do not hold evdev->mutex for too long. 4096 bytes corresponds
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* to 170 input events.
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*/
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count = min(count, 4096);
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if (count != 0 && count < input_event_size())
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return -EINVAL;
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