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firmware: xilinx: Fix dereferencing freed memory

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[ Upstream commit f1f21bece82c76a56a96988ec7d51ccc033d8949 ]

Fix smatch warning:
drivers/firmware/xilinx/zynqmp.c:1288 zynqmp_firmware_remove()
error: dereferencing freed memory 'feature_data'

Use hash_for_each_safe for safe removal of hash entry.

Fixes: acfdd18591 ("firmware: xilinx: Use hash-table for api feature check")
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Tejas Patel <tejas.patel@xilinx.com>
Signed-off-by: Rajan Vaja <rajan.vaja@xilinx.com>
Link: https://lore.kernel.org/r/1612765883-22018-1-git-send-email-rajan.vaja@xilinx.com
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Tejas Patel 2021-02-07 22:31:23 -08:00 committed by Greg Kroah-Hartman
parent 7f69649dad
commit ef7809681b
1 changed files with 3 additions and 2 deletions
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5
drivers/firmware/xilinx/zynqmp.c
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@ -2,7 +2,7 @@
/*
* Xilinx Zynq MPSoC Firmware layer
*
* Copyright (C) 2014-2020 Xilinx, Inc.
* Copyright (C) 2014-2021 Xilinx, Inc.
*
* Michal Simek <michal.simek@xilinx.com>
* Davorin Mista <davorin.mista@aggios.com>
@ -1280,12 +1280,13 @@ static int zynqmp_firmware_probe(struct platform_device *pdev)
static int zynqmp_firmware_remove(struct platform_device *pdev)
{
struct pm_api_feature_data *feature_data;
struct hlist_node *tmp;
int i;
mfd_remove_devices(&pdev->dev);
zynqmp_pm_api_debugfs_exit();
hash_for_each(pm_api_features_map, i, feature_data, hentry) {
hash_for_each_safe(pm_api_features_map, i, tmp, feature_data, hentry) {
hash_del(&feature_data->hentry);
kfree(feature_data);
}