4.19-stable review patch. If anyone has any objections, please let me know.
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From: Cai Xinchen caixinchen1@huawei.com
commit 6ad959b6703e2c4c5d7af03b4cfd5ff608036339 upstream.
The commit 04e5eac8f3ab("fbdev: savage: Error out if pixclock equals zero") checks the value of pixclock to avoid divide-by-zero error. However the function savagefb_probe doesn't handle the error return of savagefb_check_var. When pixclock is 0, it will cause divide-by-zero error.
Fixes: 04e5eac8f3ab ("fbdev: savage: Error out if pixclock equals zero") Signed-off-by: Cai Xinchen caixinchen1@huawei.com Cc: stable@vger.kernel.org Signed-off-by: Helge Deller deller@gmx.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/video/fbdev/savage/savagefb_driver.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
--- a/drivers/video/fbdev/savage/savagefb_driver.c +++ b/drivers/video/fbdev/savage/savagefb_driver.c @@ -2271,7 +2271,10 @@ static int savagefb_probe(struct pci_dev if (info->var.xres_virtual > 0x1000) info->var.xres_virtual = 0x1000; #endif - savagefb_check_var(&info->var, info); + err = savagefb_check_var(&info->var, info); + if (err) + goto failed; + savagefb_set_fix(info);
/*