Josh Poimboeuf b0bf1afde7 cdrom: Avoid barrier_nospec() in cdrom_ioctl_media_changed() ... The barrier_nospec() after the array bounds check is overkill and painfully slow for arches which implement it. Furthermore, most arches don't implement it, so they remain exposed to Spectre v1 (which can affect pretty much any CPU with branch prediction). Instead, clamp the user pointer to a valid range so it's guaranteed to be a valid array index even when the bounds check mispredicts. Fixes: 8270cb10c0 ("cdrom: Fix spectre-v1 gadget") Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org> Link: https://lore.kernel.org/r/1d86f4d9d8fba68e5ca64cdeac2451b95a8bf872.1729202937.git.jpoimboe@kernel.org Signed-off-by: Jens Axboe <axboe@kernel.dk>		2024-10-17 19:47:15 -06:00
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cdrom.c	cdrom: Avoid barrier_nospec() in cdrom_ioctl_media_changed()	2024-10-17 19:47:15 -06:00
gdrom.c
Makefile