On 2024/07/30 2:59, Dmitry Torokhov wrote: > Please do not. Or you will have to patch it again when we will still see > the same allocation failures because someone requested an input device > with "too many" slots (1024 results in 4Mb mt->red table for example). > > Just fix malloc/syzkaller not to trigger on benign memory allocation > hickups. They are normal. I chose 1024 because as far as I know 4MB is max acceptable size for all environments without triggering too large allocation warning. You worry about mt->red, but did you notice that syzbot was reporting that memory allocation for mt->red has an integer overflow bug, which can cause out of bounds write or ZERO_SIZE_PTR pointer dereference bug at input_mt_set_matrix() ? https://lkml.kernel.org/r/6d878e01-6c2f-8766-2578-c95030442369@xxxxxxxxxxxxxxxxxxx Lucky thing is that the uinput interface is for only the "root" user...
