The patch titled Subject: drm: limit to INT_MAX in create_blob ioctl has been added to the -mm tree. Its filename is drm-limit-to-int_max-in-create_blob-ioctl.patch This patch should soon appear at http://ozlabs.org/~akpm/mmots/broken-out/drm-limit-to-int_max-in-create_blob-ioctl.patch and later at http://ozlabs.org/~akpm/mmotm/broken-out/drm-limit-to-int_max-in-create_blob-ioctl.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next and is updated there every 3-4 working days ------------------------------------------------------ From: Daniel Vetter <daniel.vetter@xxxxxxxx> Subject: drm: limit to INT_MAX in create_blob ioctl The hardened usercpy code is too paranoid ever since: commit 6a30afa8c1fbde5f10f9c584c2992aa3c7f7a8fe Author: Kees Cook <keescook@xxxxxxxxxxxx> Date: Wed Nov 6 16:07:01 2019 +1100 uaccess: disallow > INT_MAX copy sizes Code itself should have been fine as-is. Link: http://lkml.kernel.org/r/20191106164755.31478-1-daniel.vetter@xxxxxxxx Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxxx> Reported-by: syzbot+fb77e97ebf0612ee6914@xxxxxxxxxxxxxxxxxxxxxxxxx Fixes: 6a30afa8c1fb ("uaccess: disallow > INT_MAX copy sizes") Cc: Kees Cook <keescook@xxxxxxxxxxxx> Cc: Alexander Viro <viro@xxxxxxxxxxxxxxxxxx> Cc: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- drivers/gpu/drm/drm_property.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/gpu/drm/drm_property.c~drm-limit-to-int_max-in-create_blob-ioctl +++ a/drivers/gpu/drm/drm_property.c @@ -561,7 +561,7 @@ drm_property_create_blob(struct drm_devi struct drm_property_blob *blob; int ret; - if (!length || length > ULONG_MAX - sizeof(struct drm_property_blob)) + if (!length || length > INT_MAX - sizeof(struct drm_property_blob)) return ERR_PTR(-EINVAL); blob = kvzalloc(sizeof(struct drm_property_blob)+length, GFP_KERNEL); _ Patches currently in -mm which might be from daniel.vetter@xxxxxxxx are drm-limit-to-int_max-in-create_blob-ioctl.patch