From df8ab4c6010b3b4eafb6732fcb268487fb654220 Mon Sep 17 00:00:00 2001 From: Jia-Ju Bai Date: Tue, 12 Dec 2017 08:47:38 -0500 Subject: [PATCH] media: bdisp: Fix a possible sleep-in-atomic bug in bdisp_hw_save_request The driver may sleep under a spinlock. The function call path is: bdisp_device_run (acquire the spinlock) bdisp_hw_update bdisp_hw_save_request devm_kzalloc(GFP_KERNEL) --> may sleep To fix it, GFP_KERNEL is replaced with GFP_ATOMIC. This bug is found by my static analysis tool(DSAC) and checked by my code review. Signed-off-by: Jia-Ju Bai Reviewed-by: Fabien Dessenne Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- drivers/media/platform/sti/bdisp/bdisp-hw.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/media/platform/sti/bdisp/bdisp-hw.c b/drivers/media/platform/sti/bdisp/bdisp-hw.c index e7836b3..a5eb592 100644 --- a/drivers/media/platform/sti/bdisp/bdisp-hw.c +++ b/drivers/media/platform/sti/bdisp/bdisp-hw.c @@ -1064,7 +1064,7 @@ static void bdisp_hw_save_request(struct bdisp_ctx *ctx) if (!copy_node[i]) { copy_node[i] = devm_kzalloc(ctx->bdisp_dev->dev, sizeof(*copy_node[i]), - GFP_KERNEL); + GFP_ATOMIC); if (!copy_node[i]) return; } -- 2.7.4