From: Kangjie Lu <[email protected]> [ Upstream commit ec7f6aad57ad29e4e66cc2e18e1e1599ddb02542 ]
When ioremap fails, hga_vram should not be dereferenced. The fix check the failure to avoid NULL pointer dereference. Signed-off-by: Kangjie Lu <[email protected]> Cc: Aditya Pakki <[email protected]> Cc: Ferenc Bakonyi <[email protected]> [b.zolnierkie: minor patch summary fixup] Signed-off-by: Bartlomiej Zolnierkiewicz <[email protected]> Signed-off-by: Sasha Levin <[email protected]> --- drivers/video/fbdev/hgafb.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/video/fbdev/hgafb.c b/drivers/video/fbdev/hgafb.c index 15d3ccff29654..4a397c7c1b560 100644 --- a/drivers/video/fbdev/hgafb.c +++ b/drivers/video/fbdev/hgafb.c @@ -285,6 +285,8 @@ static int hga_card_detect(void) hga_vram_len = 0x08000; hga_vram = ioremap(0xb0000, hga_vram_len); + if (!hga_vram) + goto error; if (request_region(0x3b0, 12, "hgafb")) release_io_ports = 1; -- 2.20.1 _______________________________________________ dri-devel mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/dri-devel
