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Date: Thu, 1 Apr 2021 11:55:50 +0200 From: Geert Uytterhoeven <geert@...ux-m68k.org> To: Phillip Potter <phil@...lpotter.co.uk> Cc: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>, Daniel Vetter <daniel.vetter@...ll.ch>, DRI Development <dri-devel@...ts.freedesktop.org>, Linux Fbdev development list <linux-fbdev@...r.kernel.org>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org> Subject: Re: [PATCH] zero-fill colormap in drivers/video/fbdev/core/fbcmap.c On Thu, Apr 1, 2021 at 12:09 AM Phillip Potter <phil@...lpotter.co.uk> wrote: > Use kzalloc() rather than kmalloc() for the dynamically allocated parts > of the colormap in fb_alloc_cmap_gfp, to prevent a leak of random kernel > data to userspace under certain circumstances. > > Fixes a KMSAN-found infoleak bug reported by syzbot at: > https://syzkaller.appspot.com/bug?id=741578659feabd108ad9e06696f0c1f2e69c4b6e > > Reported-by: syzbot+47fa9c9c648b765305b9@...kaller.appspotmail.com > Signed-off-by: Phillip Potter <phil@...lpotter.co.uk> Reviewed-by: Geert Uytterhoeven <geert+renesas@...der.be> Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds
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