unimore/kernel-hacking-2024-linux-steffo
unimore/kernel-hacking-2024-linux-steffo
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V4L/DVB (4341): VIDIOCSMICROCODE were missing on compat_ioctl32

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video_code size is 24 on i386 and 32 on x86_64, so a proper handling is needed
on compat_ioctl32 to fix it.
This code should be tested, since just *a few* boards use this ioctl.

Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Mauro Carvalho Chehab 2006-07-21 18:53:23 -03:00
parent 95faba22d8
commit eb4eeccc18
1 changed files with 24 additions and 0 deletions
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24
drivers/media/video/compat_ioctl32.c
View file

@ -490,6 +490,23 @@ static inline int put_v4l2_input(struct v4l2_input *kp, struct v4l2_input __user
return 0;
}
struct video_code32
{
char loadwhat[16]; /* name or tag of file being passed */
compat_int_t datasize;
unsigned char *data;
};
static inline int microcode32(struct video_code *kp, struct video_code32 __user *up)
{
if(!access_ok(VERIFY_READ, up, sizeof(struct video_code32)) ||
copy_from_user(kp->loadwhat, up->loadwhat, sizeof (up->loadwhat)) ||
get_user(kp->datasize, &up->datasize) ||
copy_from_user(kp->data, up->data, up->datasize))
return -EFAULT;
return 0;
}
#define VIDIOCGTUNER32 _IOWR('v',4, struct video_tuner32)
#define VIDIOCSTUNER32 _IOW('v',5, struct video_tuner32)
#define VIDIOCGWIN32 _IOR('v',9, struct video_window32)
@ -498,6 +515,7 @@ static inline int put_v4l2_input(struct v4l2_input *kp, struct v4l2_input __user
#define VIDIOCSFBUF32 _IOW('v',12, struct video_buffer32)
#define VIDIOCGFREQ32 _IOR('v',14, u32)
#define VIDIOCSFREQ32 _IOW('v',15, u32)
#define VIDIOCSMICROCODE32 _IOW('v',27, struct video_code32)
/* VIDIOC_ENUMINPUT32 is VIDIOC_ENUMINPUT minus 4 bytes of padding alignement */
#define VIDIOC_ENUMINPUT32 VIDIOC_ENUMINPUT - _IOC(0, 0, 0, 4)
@ -590,6 +608,7 @@ static int do_video_ioctl(struct file *file, unsigned int cmd, unsigned long arg
struct video_tuner vt;
struct video_buffer vb;
struct video_window vw;
struct video_code vc;
struct v4l2_format v2f;
struct v4l2_buffer v2b;
struct v4l2_framebuffer v2fb;
@ -628,6 +647,7 @@ static int do_video_ioctl(struct file *file, unsigned int cmd, unsigned long arg
case VIDIOC_G_INPUT32: cmd = VIDIOC_G_INPUT; break;
case VIDIOC_S_INPUT32: cmd = VIDIOC_S_INPUT; break;
case VIDIOC_TRY_FMT32: cmd = VIDIOC_TRY_FMT; break;
case VIDIOCSMICROCODE32: cmd = VIDIOCSMICROCODE; break;
};
switch(cmd) {
@ -703,6 +723,10 @@ static int do_video_ioctl(struct file *file, unsigned int cmd, unsigned long arg
case VIDIOC_G_FBUF:
case VIDIOC_G_INPUT:
compatible_arg = 0;
case VIDIOCSMICROCODE:
err = microcode32(&karg.vc, up);
compatible_arg = 0;
break;
};
if(err)