5.15-stable review patch. If anyone has any objections, please let me know.
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From: Shuai Xue xueshuai@linux.alibaba.com
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 xueshuai@linux.alibaba.com Reviewed-by: Dave Jiang dave.jiang@intel.com Reviewed-by: Fenghua Yu fenghuay@nvidia.com Link: https://lore.kernel.org/r/20250404120217.48772-4-xueshuai@linux.alibaba.com Signed-off-by: Vinod Koul vkoul@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/dma/idxd/init.c | 4 ++++ 1 file changed, 4 insertions(+)
--- a/drivers/dma/idxd/init.c +++ b/drivers/dma/idxd/init.c @@ -340,6 +340,7 @@ static int idxd_setup_groups(struct 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; }
@@ -359,7 +360,10 @@ static int idxd_setup_groups(struct idxd while (--i >= 0) { group = idxd->groups[i]; put_device(group_confdev(group)); + kfree(group); } + kfree(idxd->groups); + return rc; }