When build v5.18 kernel, there is below warning reported:
arch/arm64/kernel/perf_regs.c:56:34: warning: array subscript 32 is above
array bounds of 'u64[31]' {aka 'long long unsigned int[31]'} [-Warray-bounds]
56 | return regs->regs[PERF_REG_ARM64_PC];
This issue is introduced by commit 2277d295502a("perf: perf can not
parser the backtrace of app in the 32bit system and 64bit kernel.").
Because it uses the index that is out of array bounds. Therefore, instead
of regs[] with pc to avoid building error.
Signed-off-by: Meng Li <[email protected]>
---
arch/arm64/kernel/perf_regs.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
mode change 100644 => 100755 arch/arm64/kernel/perf_regs.c
diff --git a/arch/arm64/kernel/perf_regs.c b/arch/arm64/kernel/perf_regs.c
old mode 100644
new mode 100755
index d38fddde768d..469d28d26b2f
--- a/arch/arm64/kernel/perf_regs.c
+++ b/arch/arm64/kernel/perf_regs.c
@@ -53,7 +53,7 @@ u64 perf_reg_value(struct pt_regs *regs, int idx)
if (perf_reg_abi(current) == PERF_SAMPLE_REGS_ABI_32
&& idx == 15)
- return regs->regs[PERF_REG_ARM64_PC];
+ return regs->pc;
return regs->regs[idx];
}
--
2.36.0
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