Re: [PATCH 1/2] Choosing the most memory-consuming key slot when estimating the memory requirement for LUKS-encrypted target
Reviewed-by: Lichen Liu <lichliu(a)redhat.com>
On Mon, Sep 5, 2022 at 6:24 PM Coiby Xu <coxu(a)redhat.com> wrote:
When there are multiple key slots, "kdumpctl estimate" uses the least
memory-consuming key slot. For example, when there are two memory slots
created with --pbkdf-memory=1048576 (1G) and --pbkdf-memory=524288 (512M),
"kdumpctl estimate" thinks the extra memory requirement is only 512M.
This will of course lead to OOM if the user uses the more
memory-consuming key slot. Fix it by sorting in reverse order.
Fixes: e9e6a2c ("kdumpctl: Add kdumpctl estimate")
Signed-off-by: Coiby Xu <coxu(a)redhat.com>
---
kdumpctl | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kdumpctl b/kdumpctl
index 126ecb9..ee40d33 100755
--- a/kdumpctl
+++ b/kdumpctl
@@ -1241,7 +1241,7 @@ do_estimate()
for _dev in $(get_all_kdump_crypt_dev); do
_crypt_info=$(cryptsetup luksDump "/dev/block/$_dev")
[[ $(echo "$_crypt_info" | sed -n
"s/^Version:\s*\(.*\)/\1/p") == "2" ]] || continue
- for _mem in $(echo "$_crypt_info" | sed -n
"s/\sMemory:\s*\(.*\)/\1/p" | sort -n); do
+ for _mem in $(echo "$_crypt_info" | sed -n
"s/\sMemory:\s*\(.*\)/\1/p" | sort -n -r); do
crypt_size=$((crypt_size + _mem * 1024))
break
done
--
2.37.1
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