[PATCH] pstore/ram: Return directly after a failed kasprintf() call in ramoops_init_prz()

[Markus Elfring]

From: Markus Elfring <elfring@xxxxxxxxxxxxxxxxxxxxx>
Date: Wed, 17 Jan 2024 21:09:22 +0100

The result from a call of the function “kasprintf” was passed to
a subsequent function call without checking for a null pointer before
(according to a memory allocation failure).
This issue was detected by using the Coccinelle software.

Thus return directly after a failed kasprintf() call.

Fixes: 1227daa43bce1 ("pstore/ram: Clarify resource reservation labels")
Signed-off-by: Markus Elfring <elfring@xxxxxxxxxxxxxxxxxxxxx>
---
 fs/pstore/ram.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c
index 88b34fdbf759..1a673a4af17c 100644
--- a/fs/pstore/ram.c
+++ b/fs/pstore/ram.c
@@ -595,6 +595,9 @@ static int ramoops_init_prz(const char *name,
 	}

 	label = kasprintf(GFP_KERNEL, "ramoops:%s", name);
+	if (!label)
+		return -ENOMEM;
+
 	*prz = persistent_ram_new(*paddr, sz, sig, &cxt->ecc_info,
 				  cxt->memtype, PRZ_FLAG_ZAP_OLD, label);
 	kfree(label);
--
2.43.0