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misc: tps6594-pfsm: Add NULL pointer check in tps6594_pfsm_probe()

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The returned value, pfsm->miscdev.name, from devm_kasprintf()
could be NULL.
A pointer check is added to prevent potential NULL pointer dereference.
This is similar to the fix in commit 3027e7b15b
("ice: Fix some null pointer dereference issues in ice_ptp.c").

This issue is found by our static analysis tool.

Signed-off-by: Chenyuan Yang <chenyuan0y@gmail.com>
Link: https://lore.kernel.org/r/20250311010511.1028269-1-chenyuan0y@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Chenyuan Yang 2025-03-10 20:05:11 -05:00 committed by Greg Kroah-Hartman
parent fc788c4068
commit a99b598d83
1 changed files with 3 additions and 0 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

3
drivers/misc/tps6594-pfsm.c
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@ -281,6 +281,9 @@ static int tps6594_pfsm_probe(struct platform_device *pdev)
pfsm->miscdev.minor = MISC_DYNAMIC_MINOR;
pfsm->miscdev.name = devm_kasprintf(dev, GFP_KERNEL, "pfsm-%ld-0x%02x",
tps->chip_id, tps->reg);
if (!pfsm->miscdev.name)
return -ENOMEM;
pfsm->miscdev.fops = &tps6594_pfsm_fops;
pfsm->miscdev.parent = dev->parent;
pfsm->chip_id = tps->chip_id;