nvme/libnvme
1
0
Fork 0
Code Issues Activity

Cherry-picking upstream commits to fix buffer overflow during scanning devices that do not support sub-4k reads (Closes: #1054631).

Browse source 
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Signed-off-by: Daniel Baumann <daniel@debian.org>
This commit is contained in:
Daniel Baumann 2025-02-16 10:52:11 +01:00
parent cd3404518a
commit 3dd70921f9
Signed by: daniel
GPG key ID: FBB4F0E80A80222F
3 changed files with 99 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

53
debian/patches/upstream/0002-aligned-payloads.patch vendored Normal file
View file

@ -0,0 +1,53 @@
Author: Tomas Bzatek <tbzatek@redhat.com>
Description: tree: Allocate aligned payloads for ns scan
libnvme is actually doing some namespace identification
during tree scan, leading to stack smash on some systems.
diff -Naurp libnvme.orig/src/nvme/tree.c libnvme/src/nvme/tree.c
--- libnvme.orig/src/nvme/tree.c
+++ libnvme/src/nvme/tree.c
@@ -1788,26 +1788,33 @@ static void nvme_ns_parse_descriptors(st
static int nvme_ns_init(struct nvme_ns *n)
{
- struct nvme_id_ns ns = { };
- uint8_t buffer[NVME_IDENTIFY_DATA_SIZE] = { };
- struct nvme_ns_id_desc *descs = (void *)buffer;
+ struct nvme_id_ns *ns;
+ struct nvme_ns_id_desc *descs;
uint8_t flbas;
int ret;
- ret = nvme_ns_identify(n, &ns);
- if (ret)
+ ns = __nvme_alloc(sizeof(*ns));
+ if (!ns)
+ return 0;
+ ret = nvme_ns_identify(n, ns);
+ if (ret) {
+ free(ns);
return ret;
+ }
- nvme_id_ns_flbas_to_lbaf_inuse(ns.flbas, &flbas);
- n->lba_shift = ns.lbaf[flbas].ds;
+ nvme_id_ns_flbas_to_lbaf_inuse(ns->flbas, &flbas);
+ n->lba_shift = ns->lbaf[flbas].ds;
n->lba_size = 1 << n->lba_shift;
- n->lba_count = le64_to_cpu(ns.nsze);
- n->lba_util = le64_to_cpu(ns.nuse);
- n->meta_size = le16_to_cpu(ns.lbaf[flbas].ms);
+ n->lba_count = le64_to_cpu(ns->nsze);
+ n->lba_util = le64_to_cpu(ns->nuse);
+ n->meta_size = le16_to_cpu(ns->lbaf[flbas].ms);
- if (!nvme_ns_identify_descs(n, descs))
+ descs = __nvme_alloc(NVME_IDENTIFY_DATA_SIZE);
+ if (descs && !nvme_ns_identify_descs(n, descs))
nvme_ns_parse_descriptors(n, descs);
+ free(ns);
+ free(descs);
return 0;
}