From: Shuai Xue Date: Fri, 4 Apr 2025 12:02:11 +0000 (+0800) Subject: dmaengine: idxd: fix memory leak in error handling path of idxd_setup_groups X-Git-Tag: v6.6.92~22 X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=6ab9526e32ac79a2f5ea80e185a01e6c94a8bd48;p=thirdparty%2Fkernel%2Fstable.git dmaengine: idxd: fix memory leak in error handling path of idxd_setup_groups commit aa6f4f945b10eac57aed46154ae7d6fada7fccc7 upstream. Memory allocated for groups is not freed if an error occurs during idxd_setup_groups(). To fix it, free the allocated memory in the reverse order of allocation before exiting the function in case of an error. Fixes: defe49f96012 ("dmaengine: idxd: fix group conf_dev lifetime") Cc: stable@vger.kernel.org Signed-off-by: Shuai Xue Reviewed-by: Dave Jiang Reviewed-by: Fenghua Yu Link: https://lore.kernel.org/r/20250404120217.48772-4-xueshuai@linux.alibaba.com Signed-off-by: Vinod Koul Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/dma/idxd/init.c b/drivers/dma/idxd/init.c index 62b1a5ec571b7..b75f498e46d48 100644 --- a/drivers/dma/idxd/init.c +++ b/drivers/dma/idxd/init.c @@ -316,6 +316,7 @@ static int idxd_setup_groups(struct idxd_device *idxd) rc = dev_set_name(conf_dev, "group%d.%d", idxd->id, group->id); if (rc < 0) { put_device(conf_dev); + kfree(group); goto err; } @@ -340,7 +341,10 @@ static int idxd_setup_groups(struct idxd_device *idxd) while (--i >= 0) { group = idxd->groups[i]; put_device(group_confdev(group)); + kfree(group); } + kfree(idxd->groups); + return rc; }