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properly copy ioctl memory to kernelspace To: Greg Kroah-Hartman , linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org Cc: linux-kernel@vger.kernel.org, Tianchu Chen , stable , Steve Glendinning References: <2025122802-radiance-vacancy-11da@gregkh> Content-Language: en-US From: Helge Deller Autocrypt: addr=deller@gmx.de; keydata= xsFNBF3Ia3MBEAD3nmWzMgQByYAWnb9cNqspnkb2GLVKzhoH2QD4eRpyDLA/3smlClbeKkWT HLnjgkbPFDmcmCz5V0Wv1mKYRClAHPCIBIJgyICqqUZo2qGmKstUx3pFAiztlXBANpRECgwJ r+8w6mkccOM9GhoPU0vMaD/UVJcJQzvrxVHO8EHS36aUkjKd6cOpdVbCt3qx8cEhCmaFEO6u CL+k5AZQoABbFQEBocZE1/lSYzaHkcHrjn4cQjc3CffXnUVYwlo8EYOtAHgMDC39s9a7S90L 69l6G73lYBD/Br5lnDPlG6dKfGFZZpQ1h8/x+Qz366Ojfq9MuuRJg7ZQpe6foiOtqwKym/zV dVvSdOOc5sHSpfwu5+BVAAyBd6hw4NddlAQUjHSRs3zJ9OfrEx2d3mIfXZ7+pMhZ7qX0Axlq Lq+B5cfLpzkPAgKn11tfXFxP+hcPHIts0bnDz4EEp+HraW+oRCH2m57Y9zhcJTOJaLw4YpTY GRUlF076vZ2Hz/xMEvIJddRGId7UXZgH9a32NDf+BUjWEZvFt1wFSW1r7zb7oGCwZMy2LI/G aHQv/N0NeFMd28z+deyxd0k1CGefHJuJcOJDVtcE1rGQ43aDhWSpXvXKDj42vFD2We6uIo9D 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kGY88Tz3TP090bD5tTHP6ogR/VEYALZY2r1KTejO1lKJ0bRNnUSNmZcxRt9LwWziY63Rv3UVN hNevSgafgQ1WfgNBdhkxdYU5sH0IjlZ0GtUCMIz6HojGcIO4DAT36YVFJHFRmB0VxEciFJekt axB1NhjIct+qiaXfaFHVNdHDG2vjntdqoSFzg0/pnGeZRv0Kq3GhEqokZnj8Gt+8aMak+2ppd 2wb0bBlE2Ede9gVcVRn1K6g52InAPTuend9M06nGZeZEAGpFA48Zh3KNPJZ39fY3wWzlJbHi3 sx5PgJtiUd9ZVHsXlhFrmGxfdpaEesM8VE4yrpAEDiu19cWacYWkBhUBrvgpOTeKDHx+VbpfA TpR67c7QkUqQ98OLdYxoKEUHrc+Vbaflhw/CxfXv8p2d8NBeyfEzyuQayIcDxII6nEkjx0yK3 tWVV/s1WYvWmjJj/k= On 12/28/25 14:17, Greg Kroah-Hartman wrote: > The UFX_IOCTL_REPORT_DAMAGE ioctl does not properly copy data from > userspace to kernelspace, and instead directly references the memory, > which can cause problems if invalid data is passed from userspace. Fix > this all up by correctly copying the memory before accessing it within > the kernel. >=20 > Reported-by: Tianchu Chen > Cc: stable > Cc: Steve Glendinning > Cc: Helge Deller > Signed-off-by: Greg Kroah-Hartman > --- > drivers/video/fbdev/smscufx.c | 8 ++++++-- > 1 file changed, 6 insertions(+), 2 deletions(-) applied to fbdev git tree. Thanks! Helge