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| author | Antonino A. Daplas <adaplas@gmail.com> | 2007-08-10 13:00:47 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-08-11 15:47:40 -0700 |
| commit | 9cd1c67434544b1d9a4fb4a4cdec15608167a233 (patch) | |
| tree | 04c872c916fc26e78b7a492f5ecfa681e641d2fc | |
| parent | 4769a9a53b39f3b6a7e4d0b3c5e6b9598560818d (diff) | |
| download | linux-3.10-9cd1c67434544b1d9a4fb4a4cdec15608167a233.tar.gz linux-3.10-9cd1c67434544b1d9a4fb4a4cdec15608167a233.tar.bz2 linux-3.10-9cd1c67434544b1d9a4fb4a4cdec15608167a233.zip | |
pvr2fb: Fix oops when pseudo_palette is written
Reported by: Adrian McMenamin <adrianmcmenamin@gmail.com>
This driver will oops when the pseudo_palette[] is written as u32 but not when
written as u16. When written as u32, it corrupts the adjacent 'mmio_base'
field of struct pvr2fb_par. Fix by using framebuffer_alloc()/release() to
allocate struct fb_info and struct pvr2fb_par, and create the pseudo_palette[]
as part of struct pvr2fb_par.
Signed-off-by: Antonino Daplas <adaplas@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | drivers/video/pvr2fb.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/drivers/video/pvr2fb.c b/drivers/video/pvr2fb.c index f9300266044..a72921b552d 100644 --- a/drivers/video/pvr2fb.c +++ b/drivers/video/pvr2fb.c @@ -143,6 +143,7 @@ static struct pvr2fb_par { unsigned char is_lowres; /* Is horizontal pixel-doubling enabled? */ unsigned long mmio_base; /* MMIO base */ + u32 palette[16]; } *currentpar; static struct fb_info *fb_info; @@ -790,7 +791,7 @@ static int __devinit pvr2fb_common_init(void) fb_info->fbops = &pvr2fb_ops; fb_info->fix = pvr2_fix; fb_info->par = currentpar; - fb_info->pseudo_palette = (void *)(fb_info->par + 1); + fb_info->pseudo_palette = currentpar->palette; fb_info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN; if (video_output == VO_VGA) @@ -1082,14 +1083,15 @@ static int __init pvr2fb_init(void) #endif size = sizeof(struct fb_info) + sizeof(struct pvr2fb_par) + 16 * sizeof(u32); - fb_info = kzalloc(size, GFP_KERNEL); + fb_info = framebuffer_alloc(sizeof(struct pvr2fb_par), NULL); + if (!fb_info) { printk(KERN_ERR "Failed to allocate memory for fb_info\n"); return -ENOMEM; } - currentpar = (struct pvr2fb_par *)(fb_info + 1); + currentpar = fb_info->par; for (i = 0; i < ARRAY_SIZE(board_driver); i++) { struct pvr2_board *pvr_board = board_driver + i; @@ -1102,7 +1104,7 @@ static int __init pvr2fb_init(void) if (ret != 0) { printk(KERN_ERR "pvr2fb: Failed init of %s device\n", pvr_board->name); - kfree(fb_info); + framebuffer_release(fb_info); break; } } @@ -1126,7 +1128,7 @@ static void __exit pvr2fb_exit(void) #endif unregister_framebuffer(fb_info); - kfree(fb_info); + framebuffer_release(fb_info); } module_init(pvr2fb_init); |