diff options
| author | Antonino A. Daplas <adaplas@gmail.com> | 2006-03-11 03:27:26 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-11 09:19:36 -0800 |
| commit | 54243cefdd3ab8133ebe7d3d705f35ca1d0b59eb (patch) | |
| tree | 5ceed59890052f4f8970bbac9ac1800811d94106 /drivers | |
| parent | d301524772be3eef5fae1bcd5ca76fac69bb3b6e (diff) | |
| download | lwn-54243cefdd3ab8133ebe7d3d705f35ca1d0b59eb.tar.gz lwn-54243cefdd3ab8133ebe7d3d705f35ca1d0b59eb.zip | |
[PATCH] tdfxfb: Fix buffer overrun
The pseudo_palette has room only for 16 entries, but tdfxfb_setcolreg may
attempt to write more.
Coverity Bug 557
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/video/tdfxfb.c | 42 |
1 files changed, 23 insertions, 19 deletions
diff --git a/drivers/video/tdfxfb.c b/drivers/video/tdfxfb.c index 3e7baf4c9fa8..5e5328d682db 100644 --- a/drivers/video/tdfxfb.c +++ b/drivers/video/tdfxfb.c @@ -786,28 +786,32 @@ static int tdfxfb_setcolreg(unsigned regno, unsigned red, unsigned green, if (regno >= info->cmap.len || regno > 255) return 1; switch (info->fix.visual) { - case FB_VISUAL_PSEUDOCOLOR: - rgbcol =(((u32)red & 0xff00) << 8) | - (((u32)green & 0xff00) << 0) | - (((u32)blue & 0xff00) >> 8); - do_setpalentry(par, regno, rgbcol); - break; - /* Truecolor has no hardware color palettes. */ - case FB_VISUAL_TRUECOLOR: + case FB_VISUAL_PSEUDOCOLOR: + rgbcol =(((u32)red & 0xff00) << 8) | + (((u32)green & 0xff00) << 0) | + (((u32)blue & 0xff00) >> 8); + do_setpalentry(par, regno, rgbcol); + break; + /* Truecolor has no hardware color palettes. */ + case FB_VISUAL_TRUECOLOR: + if (regno < 16) { rgbcol = (CNVT_TOHW( red, info->var.red.length) << info->var.red.offset) | - (CNVT_TOHW( green, info->var.green.length) << - info->var.green.offset) | - (CNVT_TOHW( blue, info->var.blue.length) << - info->var.blue.offset) | - (CNVT_TOHW( transp, info->var.transp.length) << - info->var.transp.offset); - par->palette[regno] = rgbcol; - break; - default: - DPRINTK("bad depth %u\n", info->var.bits_per_pixel); - break; + (CNVT_TOHW( green, info->var.green.length) << + info->var.green.offset) | + (CNVT_TOHW( blue, info->var.blue.length) << + info->var.blue.offset) | + (CNVT_TOHW( transp, info->var.transp.length) << + info->var.transp.offset); + par->palette[regno] = rgbcol; + } + + break; + default: + DPRINTK("bad depth %u\n", info->var.bits_per_pixel); + break; } + return 0; } |