Le 22/09/2025 à 17:10, Guangshuo Li a écrit :
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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: 790a1662d3a26 ("powerpc/smp: Parse ibm,thread-groups with multiple properties") Cc: stable@vger.kernel.org
changelog: v2:
- Return -ENOMEM directly on allocation failure.
Signed-off-by: Guangshuo Li lgs201920130244@gmail.com
The Signed-off-by: must be above the ---, otherwise it will be lost when applying the commit.
With that fixed,
Reviewed-by: Christophe Leroy christophe.leroy@csgroup.eu
arch/powerpc/kernel/smp.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c index 5ac7084eebc0..cfccb9389760 100644 --- a/arch/powerpc/kernel/smp.c +++ b/arch/powerpc/kernel/smp.c @@ -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)-- 2.43.0