Patch "platform/mellanox: Add null pointer checks for devm_kasprintf()" has been added to the 5.15-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    platform/mellanox: Add null pointer checks for devm_kasprintf()

to the 5.15-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     platform-mellanox-add-null-pointer-checks-for-devm_k.patch
and it can be found in the queue-5.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 5e8e90a806da024c4cdf30f21335be2ac02968fe
Author: Kunwu Chan <chentao@xxxxxxxxxx>
Date:   Fri Dec 1 13:54:47 2023 +0800

    platform/mellanox: Add null pointer checks for devm_kasprintf()
    
    [ Upstream commit 2c7c857f5fed997be93047d2de853d7f10c8defe ]
    
    devm_kasprintf() returns a pointer to dynamically allocated memory
    which can be NULL upon failure.
    
    Compile-tested only.
    
    Fixes: 1a218d312e65 ("platform/mellanox: mlxbf-pmc: Add Mellanox BlueField PMC driver")
    Suggested-by: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx>
    Suggested-by: Vadim Pasternak <vadimp@xxxxxxxxxx>
    Signed-off-by: Kunwu Chan <chentao@xxxxxxxxxx>
    Reviewed-by: Vadim Pasternak <vadimp@xxxxxxxxxx>
    Link: https://lore.kernel.org/r/20231201055447.2356001-1-chentao@xxxxxxxxxx
    [ij: split the change into two]
    Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx>
    Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/platform/mellanox/mlxbf-pmc.c b/drivers/platform/mellanox/mlxbf-pmc.c
index 2d4bbe99959ef..925bfc4aef8ce 100644
--- a/drivers/platform/mellanox/mlxbf-pmc.c
+++ b/drivers/platform/mellanox/mlxbf-pmc.c
@@ -1202,6 +1202,8 @@ static int mlxbf_pmc_init_perftype_counter(struct device *dev, int blk_num)
 	attr->dev_attr.show = mlxbf_pmc_event_list_show;
 	attr->nr = blk_num;
 	attr->dev_attr.attr.name = devm_kasprintf(dev, GFP_KERNEL, "event_list");
+	if (!attr->dev_attr.attr.name)
+		return -ENOMEM;
 	pmc->block[blk_num].block_attr[i] = &attr->dev_attr.attr;
 	attr = NULL;
 
@@ -1214,6 +1216,8 @@ static int mlxbf_pmc_init_perftype_counter(struct device *dev, int blk_num)
 		attr->nr = blk_num;
 		attr->dev_attr.attr.name = devm_kasprintf(dev, GFP_KERNEL,
 							  "enable");
+		if (!attr->dev_attr.attr.name)
+			return -ENOMEM;
 		pmc->block[blk_num].block_attr[++i] = &attr->dev_attr.attr;
 		attr = NULL;
 	}
@@ -1240,6 +1244,8 @@ static int mlxbf_pmc_init_perftype_counter(struct device *dev, int blk_num)
 		attr->nr = blk_num;
 		attr->dev_attr.attr.name = devm_kasprintf(dev, GFP_KERNEL,
 							  "counter%d", j);
+		if (!attr->dev_attr.attr.name)
+			return -ENOMEM;
 		pmc->block[blk_num].block_attr[++i] = &attr->dev_attr.attr;
 		attr = NULL;
 
@@ -1251,6 +1257,8 @@ static int mlxbf_pmc_init_perftype_counter(struct device *dev, int blk_num)
 		attr->nr = blk_num;
 		attr->dev_attr.attr.name = devm_kasprintf(dev, GFP_KERNEL,
 							  "event%d", j);
+		if (!attr->dev_attr.attr.name)
+			return -ENOMEM;
 		pmc->block[blk_num].block_attr[++i] = &attr->dev_attr.attr;
 		attr = NULL;
 	}
@@ -1283,6 +1291,8 @@ static int mlxbf_pmc_init_perftype_reg(struct device *dev, int blk_num)
 		attr->nr = blk_num;
 		attr->dev_attr.attr.name = devm_kasprintf(dev, GFP_KERNEL,
 							  events[j].evt_name);
+		if (!attr->dev_attr.attr.name)
+			return -ENOMEM;
 		pmc->block[blk_num].block_attr[i] = &attr->dev_attr.attr;
 		attr = NULL;
 		i++;
@@ -1311,6 +1321,8 @@ static int mlxbf_pmc_create_groups(struct device *dev, int blk_num)
 	pmc->block[blk_num].block_attr_grp.attrs = pmc->block[blk_num].block_attr;
 	pmc->block[blk_num].block_attr_grp.name = devm_kasprintf(
 		dev, GFP_KERNEL, pmc->block_name[blk_num]);
+	if (!pmc->block[blk_num].block_attr_grp.name)
+		return -ENOMEM;
 	pmc->groups[blk_num] = &pmc->block[blk_num].block_attr_grp;
 
 	return 0;