arch: powerpc/fadump: Cleaning up inconsistent NULL checks
Cleaning up inconsistent NULL checks.
There is otherwise a risk of a possible null pointer dereference.
Was largely found by using a static code analysis program called cppcheck.
Signed-off-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/kernel/fadump.c b/arch/powerpc/kernel/fadump.c
index 0266774..d55e898 100644
--- a/arch/powerpc/kernel/fadump.c
+++ b/arch/powerpc/kernel/fadump.c
@@ -646,7 +646,7 @@
}
/* Lower 4 bytes of reg_value contains logical cpu id */
cpu = reg_entry->reg_value & FADUMP_CPU_ID_MASK;
- if (!cpumask_test_cpu(cpu, &fdh->cpu_online_mask)) {
+ if (fdh && !cpumask_test_cpu(cpu, &fdh->cpu_online_mask)) {
SKIP_TO_NEXT_CPU(reg_entry);
continue;
}
@@ -663,9 +663,11 @@
}
fadump_final_note(note_buf);
- pr_debug("Updating elfcore header (%llx) with cpu notes\n",
+ if (fdh) {
+ pr_debug("Updating elfcore header (%llx) with cpu notes\n",
fdh->elfcorehdr_addr);
- fadump_update_elfcore_header((char *)__va(fdh->elfcorehdr_addr));
+ fadump_update_elfcore_header((char *)__va(fdh->elfcorehdr_addr));
+ }
return 0;
error_out: