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authorVito Caputo <vcaputo@pengaru.com>2023-06-23 13:27:42 -0700
committerVito Caputo <vcaputo@pengaru.com>2023-06-23 13:27:42 -0700
commitb15a58e688689b75563eb2936f7e19c949bca699 (patch)
treec8cf608f816d1007eb3e60f1d79835bd4e3cebbf /src/mem_fb.c
parentf8606bd69655b5bfce053d80d6b9f7ead6e7f03f (diff)
til_fb: prevent 0-height slices
til_fb_fragment_slice_single() and indirectly til_fragmenter_slice_per_cpu() could get into infinite loops when slicing small fragments into many slices. This became more likely with commit a2f7397 which increased per_cpu slice counts by 16X, which is how I tripped over it running rtv. A checkers,size=8,fill_module=moire sent things spinning... This commit prevents it in the obvious manner.
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