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From 626bc45396c4959f2c4685c2faa7c4f553f4efdf Mon Sep 17 00:00:00 2001
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From: Mateusz Grzonka <mateusz.grzonka@intel.com>
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Date: Mon, 13 Jun 2022 11:59:34 +0200
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Subject: [PATCH 18/52] Fix possible NULL ptr dereferences and memory leaks
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In Assemble there was a NULL check for sra variable,
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which effectively didn't stop the execution in every case.
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That might have resulted in a NULL pointer dereference.
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Also in super-ddf, mu variable was set to NULL for some condition,
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and then immidiately dereferenced.
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Additionally some memory wasn't freed as well.
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Signed-off-by: Mateusz Grzonka <mateusz.grzonka@intel.com>
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Signed-off-by: Jes Sorensen <jsorensen@fb.com>
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---
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Assemble.c | 7 ++++++-
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super-ddf.c | 9 +++++++--
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2 files changed, 13 insertions(+), 3 deletions(-)
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diff --git a/Assemble.c b/Assemble.c
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index 9eac9ce0..4b213560 100644
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--- a/Assemble.c
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+++ b/Assemble.c
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@@ -1982,7 +1982,12 @@ int assemble_container_content(struct supertype *st, int mdfd,
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}
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sra = sysfs_read(mdfd, NULL, GET_VERSION|GET_DEVS);
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- if (sra == NULL || strcmp(sra->text_version, content->text_version) != 0) {
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+ if (sra == NULL) {
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+ pr_err("Failed to read sysfs parameters\n");
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+ return 1;
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+ }
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+
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+ if (strcmp(sra->text_version, content->text_version) != 0) {
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if (content->array.major_version == -1 &&
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content->array.minor_version == -2 &&
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c->readonly &&
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diff --git a/super-ddf.c b/super-ddf.c
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index 8cda23a7..abbc8b09 100644
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--- a/super-ddf.c
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+++ b/super-ddf.c
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@@ -5125,13 +5125,16 @@ static struct mdinfo *ddf_activate_spare(struct active_array *a,
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*/
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vc = find_vdcr(ddf, a->info.container_member, rv->disk.raid_disk,
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&n_bvd, &vcl;;
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- if (vc == NULL)
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+ if (vc == NULL) {
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+ free(rv);
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return NULL;
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+ }
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mu = xmalloc(sizeof(*mu));
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if (posix_memalign(&mu->space, 512, sizeof(struct vcl)) != 0) {
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free(mu);
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- mu = NULL;
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+ free(rv);
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+ return NULL;
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}
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mu->len = ddf->conf_rec_len * 512 * vcl->conf.sec_elmnt_count;
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@@ -5161,6 +5164,8 @@ static struct mdinfo *ddf_activate_spare(struct active_array *a,
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pr_err("BUG: can't find disk %d (%d/%d)\n",
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di->disk.raid_disk,
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di->disk.major, di->disk.minor);
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+ free(mu);
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+ free(rv);
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return NULL;
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}
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vc->phys_refnum[i_prim] = ddf->phys->entries[dl->pdnum].refnum;
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--
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2.31.1
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