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fbdev: imsttfb: fix double free in probe() 

[ Upstream commit e08c30efda21ef4c0ec084a3a9581c220b442ba9 ]

The init_imstt() function calls framebuffer_release() on error and then
the probe() function calls it again.  It should only be done in probe.

Fixes: 518ecb6a20 ("fbdev: imsttfb: Fix error path of imsttfb_probe()")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Dan Carpenter 2023-10-27 15:04:56 +03:00 committed by Greg Kroah-Hartman
parent f2a79f3651
commit eb4f2e1788
1 changed files with 1 additions and 5 deletions
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6
drivers/video/fbdev/imsttfb.c
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@ -1419,7 +1419,6 @@ static int init_imstt(struct fb_info *info)
if ((info->var.xres * info->var.yres) * (info->var.bits_per_pixel >> 3) > info->fix.smem_len
|| !(compute_imstt_regvals(par, info->var.xres, info->var.yres))) {
printk("imsttfb: %ux%ux%u not supported\n", info->var.xres, info->var.yres, info->var.bits_per_pixel);
framebuffer_release(info);
return -ENODEV;
}
@ -1452,14 +1451,11 @@ static int init_imstt(struct fb_info *info)
FBINFO_HWACCEL_FILLRECT |
FBINFO_HWACCEL_YPAN;
if (fb_alloc_cmap(&info->cmap, 0, 0)) {
framebuffer_release(info);
if (fb_alloc_cmap(&info->cmap, 0, 0))
return -ENODEV;
}
if (register_framebuffer(info) < 0) {
fb_dealloc_cmap(&info->cmap);
framebuffer_release(info);
return -ENODEV;
}