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| author |   Dan Carpenter <dan.carpenter@oracle.com> | 2017-07-31 18:45:41 +0200 |
|---|---|---|
| committer |   Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> | 2017-07-31 18:45:41 +0200 |
| commit | 5ae29649e03f58be0f412c21b62b203aa7cf1680 (patch) | |
| tree | 656790e6704b6f12ae9d73ce6fd46a2d466853e1 /drivers/video | |
| parent | Linux 4.13-rc3 (diff) | |
| download | linux-dev-5ae29649e03f58be0f412c21b62b203aa7cf1680.tar.xz linux-dev-5ae29649e03f58be0f412c21b62b203aa7cf1680.zip | |
video: fbdev: imxfb: use after free in imxfb_remove()
We free "info" then dereference it on the next line. Really this whole
function would be better if we wrote it to unwind in the mirror of how
things are allocated in the probe.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Alexander Shiyan <shc_work@mail.ru>
Cc: Sascha Hauer <kernel@pengutronix.de>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Diffstat (limited to 'drivers/video')
| -rw-r--r-- | drivers/video/fbdev/imxfb.c | 10 |
1 files changed, 3 insertions, 7 deletions
diff --git a/drivers/video/fbdev/imxfb.c b/drivers/video/fbdev/imxfb.c index c166e0725be5..ba82f97fb42b 100644 --- a/drivers/video/fbdev/imxfb.c +++ b/drivers/video/fbdev/imxfb.c @@ -1073,20 +1073,16 @@ static int imxfb_remove(struct platform_device *pdev) imxfb_disable_controller(fbi); unregister_framebuffer(info); - + fb_dealloc_cmap(&info->cmap); pdata = dev_get_platdata(&pdev->dev); if (pdata && pdata->exit) pdata->exit(fbi->pdev); - - fb_dealloc_cmap(&info->cmap); - kfree(info->pseudo_palette); - framebuffer_release(info); - dma_free_wc(&pdev->dev, fbi->map_size, info->screen_base, fbi->map_dma); - iounmap(fbi->regs); release_mem_region(res->start, resource_size(res)); + kfree(info->pseudo_palette); + framebuffer_release(info); return 0; } |