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cov: ensure buffer always ends with nul

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When we print anything out of buffer, ensure there is \0.
This commit is contained in:
Zdenek Kabelac 2024-03-28 16:36:25 +01:00
parent 1d150d63c7
commit 8965fd18aa
1 changed files with 6 additions and 6 deletions
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12
tools/pvck.c
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@ -852,7 +852,7 @@ static int _dump_meta_area(struct device *dev, struct devicefile *def, const cha
if (!tofile)
return_0;
if (!(meta_buf = zalloc(mda_size)))
if (!(meta_buf = zalloc(mda_size + 1)))
return_0;
if (!_read_bytes(dev, def, mda_offset, mda_size, meta_buf)) {
@ -901,7 +901,7 @@ static int _dump_current_text(struct device *dev, struct devicefile *def,
int ri = rlocn_index; /* 0 or 1 */
int bad = 0;
if (!(meta_buf = malloc(meta_size + 1))) {
if (!(meta_buf = zalloc(meta_size + 1))) {
log_print("CHECK: mda_header_%d.raw_locn[%d] no mem for metadata text size %llu", mn, ri,
(unsigned long long)meta_size);
return 0;
@ -1018,7 +1018,7 @@ static int _dump_label_and_pv_header(struct cmd_context *cmd, uint64_t labelsect
uint64_t *mda2_offset, uint64_t *mda2_size,
int *mda_count_out)
{
char buf[512];
char buf[512 + 1] = { 0 };
char str[256];
struct label_header *lh;
struct pv_header *pvh;
@ -1266,7 +1266,7 @@ static int _dump_mda_header(struct cmd_context *cmd, struct settings *set,
uint32_t *checksum0_ret,
int *found_header)
{
char buf[512];
char buf[512 + 1] = { 0 };
char str[256];
char *mda_buf;
struct mda_header *mh;
@ -1365,7 +1365,7 @@ static int _dump_mda_header(struct cmd_context *cmd, struct settings *set,
* looking at all copies of the metadata in the area
*/
if (print_metadata == PRINT_ALL) {
if (!(mda_buf = zalloc(mda_size)))
if (!(mda_buf = zalloc(mda_size + 1)))
goto_out;
if (!_read_bytes(dev, def, mda_offset, mda_size, mda_buf)) {
@ -1747,7 +1747,7 @@ static int _dump_search(struct cmd_context *cmd, const char *dump, struct settin
log_print("Searching for metadata at offset %llu size %llu",
(unsigned long long)mda_offset, (unsigned long long)mda_size);
if (!(buf = zalloc(mda_size)))
if (!(buf = zalloc(mda_size + 1)))
return_0;
if (!_read_bytes(dev, def, mda_offset, mda_size, buf)) {