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FAILED: patch "[PATCH] Staging: fbtft: fix memory leak in fbtft_framebuffer_alloc" failed to apply to 4.4-stable tree

PATCH [email protected] 1 participant 1 message Oct 14, 2019

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Stable branch Staging Fbtft Framebuffer drivers
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The patch below does not apply to the 4.4-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 5bdea6060618cfcf1459dca137e89aee038ac8b9 Mon Sep 17 00:00:00 2001
From: Navid Emamdoost <[email protected]>
Date: Sun, 29 Sep 2019 22:09:45 -0500
Subject: [PATCH] Staging: fbtft: fix memory leak in fbtft_framebuffer_alloc

In fbtft_framebuffer_alloc the error handling path should take care of releasing frame buffer after it is allocated via framebuffer_alloc, too. Therefore, in two failure cases the goto destination is changed to address this issue.

Fixes c296d5f9957c ("staging: fbtft: core support")
Signed-off-by Navid Emamdoost <[email protected]>
Reviewed-by Dan Carpenter <[email protected]>
Cc stable <[email protected]>
Link https://lore.kernel.org/r/[email protected] open here
Signed-off-by Greg Kroah-Hartman <[email protected]>
drivers/staging/fbtft/fbtft-core.c +5 -2
index cf5700a2ea66..a0a67aa517f0 100644
@@ -714,7 +714,7 @@ struct fb_info *fbtft_framebuffer_alloc(struct fbtft_display *display,
 	if (par->gamma.curves && gamma) {
 		if (fbtft_gamma_parse_str(par, par->gamma.curves, gamma,
 					  strlen(gamma)))
-			goto alloc_fail;
+			goto release_framebuf;
 	}
 
 	/* Transmit buffer */

@@ -731,7 +731,7 @@ struct fb_info *fbtft_framebuffer_alloc(struct fbtft_display *display,
 	if (txbuflen > 0) {
 		txbuf = devm_kzalloc(par->info->device, txbuflen, GFP_KERNEL);
 		if (!txbuf)
-			goto alloc_fail;
+			goto release_framebuf;
 		par->txbuf.buf = txbuf;
 		par->txbuf.len = txbuflen;
 	}

@@ -753,6 +753,9 @@ struct fb_info *fbtft_framebuffer_alloc(struct fbtft_display *display,
 
 	return info;
 
+release_framebuf:
+	framebuffer_release(info);
+
 alloc_fail:
 	vfree(vmem);