[PATCH 5.15 066/215] powerpc/xics: Check return value of kasprintf in icp_native_map_one_cpu

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5.15-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Kunwu Chan <chentao@xxxxxxxxxx>

[ Upstream commit 45b1ba7e5d1f6881050d558baf9bc74a2ae13930 ]

kasprintf() returns a pointer to dynamically allocated memory
which can be NULL upon failure. Ensure the allocation was successful
by checking the pointer validity.

Signed-off-by: Kunwu Chan <chentao@xxxxxxxxxx>
Signed-off-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Link: https://msgid.link/20231122030651.3818-1-chentao@xxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 arch/powerpc/sysdev/xics/icp-native.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/powerpc/sysdev/xics/icp-native.c b/arch/powerpc/sysdev/xics/icp-native.c
index 7d13d2ef5a905..66de291b27d08 100644
--- a/arch/powerpc/sysdev/xics/icp-native.c
+++ b/arch/powerpc/sysdev/xics/icp-native.c
@@ -235,6 +235,8 @@ static int __init icp_native_map_one_cpu(int hw_id, unsigned long addr,
 	rname = kasprintf(GFP_KERNEL, "CPU %d [0x%x] Interrupt Presentation",
 			  cpu, hw_id);
 
+	if (!rname)
+		return -ENOMEM;
 	if (!request_mem_region(addr, size, rname)) {
 		pr_warn("icp_native: Could not reserve ICP MMIO for CPU %d, interrupt server #0x%x\n",
 			cpu, hw_id);
-- 
2.43.0







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