Because memory ranges in mem->ranges are stored in ascending order, when we detect `p_end < start`, we can break the for loop early, as the subsequent memory ranges must also be outside the range we are looking for. Signed-off-by: Yuntao Wang <ytcoode@xxxxxxxxx> --- Hi Andrew, Patch "[PATCH 2/2] crash_core: fix out-of-bounds access check in crash_exclude_mem_range()" can be ignored, use this patch instead. kernel/crash_core.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/kernel/crash_core.c b/kernel/crash_core.c index 9a219a918638..d425c4a106cd 100644 --- a/kernel/crash_core.c +++ b/kernel/crash_core.c @@ -575,9 +575,12 @@ int crash_exclude_mem_range(struct crash_mem *mem, p_start = mstart; p_end = mend; - if (p_start > end || p_end < start) + if (p_start > end) continue; + if (p_end < start) + break; + /* Truncate any area outside of range */ if (p_start < start) p_start = start; -- 2.43.0 _______________________________________________ kexec mailing list kexec@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/kexec
