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| author | Antonino A. Daplas <adaplas@gmail.com> | 2007-05-31 10:04:57 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-31 18:48:27 +0400 |
| commit | a2b7d2e97edcad0e95ae0d3c253d3f2f69254fa4 (patch) | |
| tree | 26b392f8aa430a2715f40f54290952ea1e070436 | |
| parent | 3f0a6766e0cc5a577805732e5adb50a585c58175 (diff) | |
| download | linux-a2b7d2e97edcad0e95ae0d3c253d3f2f69254fa4.tar.xz | |
neofb: Fix pseudo_palette array overrun in neofb_setcolreg
The pseudo_palette has room for 16 entries only, but in truecolor mode, it
attempts to write 256.
Signed-off-by: Antonino Daplas <adaplas@gmail.com>
Acked-by: Tero Roponen <teanropo@jyu.fi>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | drivers/video/neofb.c | 30 |
1 files changed, 16 insertions, 14 deletions
diff --git a/drivers/video/neofb.c b/drivers/video/neofb.c index bd30aba242d0..731d7a5c5aa2 100644 --- a/drivers/video/neofb.c +++ b/drivers/video/neofb.c @@ -1286,34 +1286,36 @@ static int neofb_setcolreg(u_int regno, u_int red, u_int green, u_int blue, if (regno >= fb->cmap.len || regno > 255) return -EINVAL; - switch (fb->var.bits_per_pixel) { - case 8: + if (fb->var.bits_per_pixel <= 8) { outb(regno, 0x3c8); outb(red >> 10, 0x3c9); outb(green >> 10, 0x3c9); outb(blue >> 10, 0x3c9); - break; - case 16: - ((u32 *) fb->pseudo_palette)[regno] = + } else if (regno < 16) { + switch (fb->var.bits_per_pixel) { + case 16: + ((u32 *) fb->pseudo_palette)[regno] = ((red & 0xf800)) | ((green & 0xfc00) >> 5) | ((blue & 0xf800) >> 11); - break; - case 24: - ((u32 *) fb->pseudo_palette)[regno] = + break; + case 24: + ((u32 *) fb->pseudo_palette)[regno] = ((red & 0xff00) << 8) | ((green & 0xff00)) | ((blue & 0xff00) >> 8); - break; + break; #ifdef NO_32BIT_SUPPORT_YET - case 32: - ((u32 *) fb->pseudo_palette)[regno] = + case 32: + ((u32 *) fb->pseudo_palette)[regno] = ((transp & 0xff00) << 16) | ((red & 0xff00) << 8) | ((green & 0xff00)) | ((blue & 0xff00) >> 8); - break; + break; #endif - default: - return 1; + default: + return 1; + } } + return 0; } |