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powerpc/smp: Add check for kcalloc() failure in parse_thread_groups()

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As kcalloc() may fail, check its return value to avoid a NULL pointer
dereference when passing it to of_property_read_u32_array().

Fixes: 790a1662d3 ("powerpc/smp: Parse ibm,thread-groups with multiple properties")
Cc: stable@vger.kernel.org
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Guangshuo Li <lgs201920130244@gmail.com>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/20250923133235.1862108-1-lgs201920130244@gmail.com
This commit is contained in:
Guangshuo Li
2025-09-23 21:32:35 +08:00
committed by Madhavan Srinivasan
parent 4acc549e80
commit 33c1c6d8a2
1 changed files with 2 additions and 0 deletions
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2
arch/powerpc/kernel/smp.c
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@@ -822,6 +822,8 @@ static int parse_thread_groups(struct device_node *dn,
count = of_property_count_u32_elems(dn, "ibm,thread-groups");
thread_group_array = kcalloc(count, sizeof(u32), GFP_KERNEL);
if (!thread_group_array)
return -ENOMEM;
ret = of_property_read_u32_array(dn, "ibm,thread-groups",
thread_group_array, count);
if (ret)