5.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Cai Xinchen <caixinchen1@xxxxxxxxxx>
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@xxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Helge Deller <deller@xxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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
@@ -2273,7 +2273,10 @@ 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);
/*
