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btrfs-progs: fix memory leaks in error path 

This patch includes below fixes in error path:
1. fix memory leaks if realloc() fails
2. add missing call free_history() before return error in scrub_read_file()

Signed-off-by: Byongho Lee <bhlee.kernel@gmail.com>
Reviewed-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Byongho Lee 2015-08-21 17:51:52 +09:00 committed by David Sterba
parent d7748770a7
commit ae60507e59
4 changed files with 36 additions and 5 deletions
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8
btrfs-list.c
View File

@ -254,11 +254,15 @@ static int btrfs_list_setup_comparer(struct btrfs_list_comparer_set **comp_set,
BUG_ON(set->ncomps > set->total);
if (set->ncomps == set->total) {
void *tmp;
size = set->total + BTRFS_LIST_NCOMPS_INCREASE;
size = sizeof(*set) + size * sizeof(struct btrfs_list_comparer);
tmp = set;
set = realloc(set, size);
if (!set) {
fprintf(stderr, "memory allocation failed\n");
free(tmp);
exit(1);
}
@ -1232,11 +1236,15 @@ int btrfs_list_setup_filter(struct btrfs_list_filter_set **filter_set,
BUG_ON(set->nfilters > set->total);
if (set->nfilters == set->total) {
void *tmp;
size = set->total + BTRFS_LIST_NFILTERS_INCREASE;
size = sizeof(*set) + size * sizeof(struct btrfs_list_filter);
tmp = set;
set = realloc(set, size);
if (!set) {
fprintf(stderr, "memory allocation failed\n");
free(tmp);
exit(1);
}

18
cmds-scrub.c
View File

@ -502,12 +502,16 @@ again:
}
return p;
}
if (avail == -1)
if (avail == -1) {
free_history(p);
return ERR_PTR(-errno);
}
avail += old_avail;
i = 0;
while (i < avail) {
void *tmp;
switch (state) {
case 0: /* start of file */
ret = scrub_kvread(&i,
@ -534,11 +538,17 @@ again:
continue;
}
++curr;
tmp = p;
p = realloc(p, (curr + 2) * sizeof(*p));
if (p)
p[curr] = malloc(sizeof(**p));
if (!p || !p[curr])
if (!p) {
free_history(tmp);
return ERR_PTR(-errno);
}
p[curr] = malloc(sizeof(**p));
if (!p[curr]) {
free_history(p);
return ERR_PTR(-errno);
}
memset(p[curr], 0, sizeof(**p));
p[curr + 1] = NULL;
++state;

7
cmds-send.c
View File

@ -174,11 +174,16 @@ out:
static int add_clone_source(struct btrfs_send *s, u64 root_id)
{
void *tmp;
tmp = s->clone_sources;
s->clone_sources = realloc(s->clone_sources,
sizeof(*s->clone_sources) * (s->clone_sources_count + 1));
if (!s->clone_sources)
if (!s->clone_sources) {
free(tmp);
return -ENOMEM;
}
s->clone_sources[s->clone_sources_count++] = root_id;
return 0;

8
qgroup.c
View File

@ -465,12 +465,16 @@ int btrfs_qgroup_setup_comparer(struct btrfs_qgroup_comparer_set **comp_set,
BUG_ON(set->ncomps > set->total);
if (set->ncomps == set->total) {
void *tmp;
size = set->total + BTRFS_QGROUP_NCOMPS_INCREASE;
size = sizeof(*set) +
size * sizeof(struct btrfs_qgroup_comparer);
tmp = set;
set = realloc(set, size);
if (!set) {
fprintf(stderr, "memory allocation failed\n");
free(tmp);
exit(1);
}
@ -836,12 +840,16 @@ int btrfs_qgroup_setup_filter(struct btrfs_qgroup_filter_set **filter_set,
BUG_ON(set->nfilters > set->total);
if (set->nfilters == set->total) {
void *tmp;
size = set->total + BTRFS_QGROUP_NFILTERS_INCREASE;
size = sizeof(*set) + size * sizeof(struct btrfs_qgroup_filter);
tmp = set;
set = realloc(set, size);
if (!set) {
fprintf(stderr, "memory allocation failed\n");
free(tmp);
exit(1);
}
memset(&set->filters[set->total], 0,