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LoongArch: Check return values for set_memory_{rw,rox}

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set_memory_rw() and set_memory_rox() may fail, so we should check the
return values and return immediately in larch_insn_text_copy().

Cc: stable@vger.kernel.org
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
This commit is contained in:
Tiezhu Yang
2026-03-16 10:36:01 +08:00
committed by Huacai Chen
parent a47f0754bd
commit 431ce839da
1 changed files with 13 additions and 2 deletions
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15
arch/loongarch/kernel/inst.c
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@@ -258,6 +258,7 @@ static int text_copy_cb(void *data)
int larch_insn_text_copy(void *dst, void *src, size_t len)
{
int ret = 0;
int err = 0;
size_t start, end;
struct insn_copy copy = {
.dst = dst,
@@ -275,9 +276,19 @@ int larch_insn_text_copy(void *dst, void *src, size_t len)
start = round_down((size_t)dst, PAGE_SIZE);
end = round_up((size_t)dst + len, PAGE_SIZE);
set_memory_rw(start, (end - start) / PAGE_SIZE);
err = set_memory_rw(start, (end - start) / PAGE_SIZE);
if (err) {
pr_info("%s: set_memory_rw() failed\n", __func__);
return err;
}
ret = stop_machine_cpuslocked(text_copy_cb, &copy, cpu_online_mask);
set_memory_rox(start, (end - start) / PAGE_SIZE);
err = set_memory_rox(start, (end - start) / PAGE_SIZE);
if (err) {
pr_info("%s: set_memory_rox() failed\n", __func__);
return err;
}
return ret;
}