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Update for cppcheck v1.80

Browse Source 
Resolve new warnings and errors from cppcheck v1.80.

* [lib/libshare/libshare.c:543]: (warning)
  Possible null pointer dereference: protocol
* [lib/libzfs/libzfs_dataset.c:2323]: (warning)
  Possible null pointer dereference: srctype
* [lib/libzfs/libzfs_import.c:318]: (error)
  Uninitialized variable: link
* [module/zfs/abd.c:353]: (error) Uninitialized variable: sg
* [module/zfs/abd.c:353]: (error) Uninitialized variable: i
* [module/zfs/abd.c:385]: (error) Uninitialized variable: sg
* [module/zfs/abd.c:385]: (error) Uninitialized variable: i
* [module/zfs/abd.c:553]: (error) Uninitialized variable: i
* [module/zfs/abd.c:553]: (error) Uninitialized variable: sg
* [module/zfs/abd.c:763]: (error) Uninitialized variable: i
* [module/zfs/abd.c:763]: (error) Uninitialized variable: sg
* [module/zfs/abd.c:305]: (error) Uninitialized variable: tmp_page
* [module/zfs/zpl_xattr.c:342]: (warning)
   Possible null pointer dereference: value
* [module/zfs/zvol.c:208]: (error) Uninitialized variable: p

Convert the following suppression to inline.

* [module/zfs/zfs_vnops.c:840]: (error)
  Possible null pointer dereference: aiov

Exclude HAVE_UIO_ZEROCOPY and HAVE_DNLC from analysis since
these macro's will never be defined until this functionality
is implemented.

Reviewed-by: George Melikov <mail@gmelikov.ru>
Reviewed-by: Giuseppe Di Natale <dinatale2@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #6879
This commit is contained in:
Brian Behlendorf 2017-11-18 14:08:00 -08:00 committed by Tony Hutter
parent 7a8bef3983
commit aebc5df418
9 changed files with 23 additions and 50 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
.github/suppressions.txt vendored
View File

@ -1,4 +1,3 @@
nullPointer:./module/zfs/zfs_vnops.c:839
preprocessorErrorDirective:./module/zfs/vdev_raidz_math_avx512f.c:243
preprocessorErrorDirective:./module/zfs/vdev_raidz_math_sse2.c:266

6
Makefile.am
View File

@ -65,10 +65,10 @@ lint: cppcheck paxcheck
cppcheck:
@if type cppcheck > /dev/null 2>&1; then \
cppcheck --quiet --force --error-exitcode=2 \
cppcheck --quiet --force --error-exitcode=2 --inline-suppr \
--suppressions-list=.github/suppressions.txt \
-UHAVE_SSE2 -UHAVE_AVX512F \
${top_srcdir}; \
-UHAVE_SSE2 -UHAVE_AVX512F -UHAVE_UIO_ZEROCOPY \
-UHAVE_DNLC ${top_srcdir}; \
fi
paxcheck:

37
lib/libshare/libshare.c
View File

@ -493,20 +493,10 @@ int
sa_enable_share(sa_share_t share, char *protocol)
{
sa_share_impl_t impl_share = (sa_share_impl_t)share;
int rc, ret;
boolean_t found_protocol;
int rc, ret = SA_OK;
boolean_t found_protocol = B_FALSE;
sa_fstype_t *fstype;
#ifdef DEBUG
fprintf(stderr, "sa_enable_share: share->sharepath=%s, protocol=%s\n",
impl_share->sharepath, protocol);
#endif
assert(impl_share->handle != NULL);
ret = SA_OK;
found_protocol = B_FALSE;
fstype = fstypes;
while (fstype != NULL) {
if (protocol == NULL || strcmp(fstype->name, protocol) == 0) {
@ -534,18 +524,10 @@ int
sa_disable_share(sa_share_t share, char *protocol)
{
sa_share_impl_t impl_share = (sa_share_impl_t)share;
int rc, ret;
boolean_t found_protocol;
int rc, ret = SA_OK;
boolean_t found_protocol = B_FALSE;
sa_fstype_t *fstype;
#ifdef DEBUG
fprintf(stderr, "sa_disable_share: share->sharepath=%s, protocol=%s\n",
impl_share->sharepath, protocol);
#endif
ret = SA_OK;
found_protocol = B_FALSE;
fstype = fstypes;
while (fstype != NULL) {
if (protocol == NULL || strcmp(fstype->name, protocol) == 0) {
@ -696,11 +678,6 @@ sa_parse_legacy_options(sa_group_t group, char *options, char *proto)
{
sa_fstype_t *fstype;
#ifdef DEBUG
fprintf(stderr, "sa_parse_legacy_options: options=%s, proto=%s\n",
options, proto);
#endif
fstype = fstypes;
while (fstype != NULL) {
if (strcmp(fstype->name, proto) != 0) {
@ -787,12 +764,6 @@ sa_zfs_process_share(sa_handle_t handle, sa_group_t group, sa_share_t share,
sa_handle_impl_t impl_handle = (sa_handle_impl_t)handle;
sa_share_impl_t impl_share = (sa_share_impl_t)share;
#ifdef DEBUG
fprintf(stderr, "sa_zfs_process_share: mountpoint=%s, proto=%s, "
"shareopts=%s, sourcestr=%s, dataset=%s\n", mountpoint, proto,
shareopts, sourcestr, dataset);
#endif
return (process_share(impl_handle, impl_share, mountpoint, NULL,
proto, shareopts, NULL, dataset, B_FALSE));
}

4
lib/libzfs/libzfs_dataset.c
View File

@ -2244,8 +2244,10 @@ static void
get_source(zfs_handle_t *zhp, zprop_source_t *srctype, char *source,
char *statbuf, size_t statlen)
{
if (statbuf == NULL || *srctype == ZPROP_SRC_TEMPORARY)
if (statbuf == NULL ||
srctype == NULL || *srctype == ZPROP_SRC_TEMPORARY) {
return;
}
if (source == NULL) {
*srctype = ZPROP_SRC_NONE;

2
lib/libzfs/libzfs_import.c
View File

@ -309,7 +309,7 @@ zpool_label_disk_wait(char *path, int timeout_ms)
dev = udev_device_new_from_subsystem_sysname(udev,
"block", sysname);
if ((dev != NULL) && udev_device_is_ready(dev)) {
struct udev_list_entry *links, *link;
struct udev_list_entry *links, *link = NULL;
ret = 0;
links = udev_device_get_devlinks_list_entry(dev);

18
module/zfs/abd.c
View File

@ -250,7 +250,7 @@ abd_alloc_pages(abd_t *abd, size_t size)
struct list_head pages;
struct sg_table table;
struct scatterlist *sg;
struct page *page, *tmp_page;
struct page *page, *tmp_page = NULL;
gfp_t gfp = __GFP_NOWARN | GFP_NOIO;
gfp_t gfp_comp = (gfp | __GFP_NORETRY | __GFP_COMP) & ~__GFP_RECLAIM;
int max_order = MIN(zfs_abd_scatter_max_order, MAX_ORDER - 1);
@ -334,12 +334,12 @@ abd_alloc_pages(abd_t *abd, size_t size)
static void
abd_alloc_pages(abd_t *abd, size_t size)
{
struct scatterlist *sg;
struct scatterlist *sg = NULL;
struct sg_table table;
struct page *page;
gfp_t gfp = __GFP_NOWARN | GFP_NOIO;
int nr_pages = abd_chunkcnt_for_bytes(size);
int i;
int i = 0;
while (sg_alloc_table(&table, nr_pages, gfp)) {
ABDSTAT_BUMP(abdstat_scatter_sg_table_retry);
@ -370,11 +370,11 @@ abd_alloc_pages(abd_t *abd, size_t size)
static void
abd_free_pages(abd_t *abd)
{
struct scatterlist *sg;
struct scatterlist *sg = NULL;
struct sg_table table;
struct page *page;
int nr_pages = ABD_SCATTER(abd).abd_nents;
int order, i;
int order, i = 0;
if (abd->abd_flags & ABD_FLAG_MULTI_ZONE)
ABDSTAT_BUMPDOWN(abdstat_scatter_page_multi_zone);
@ -543,8 +543,8 @@ abd_verify(abd_t *abd)
ASSERT3P(abd->abd_u.abd_linear.abd_buf, !=, NULL);
} else {
size_t n;
int i;
struct scatterlist *sg;
int i = 0;
struct scatterlist *sg = NULL;
ASSERT3U(ABD_SCATTER(abd).abd_nents, >, 0);
ASSERT3U(ABD_SCATTER(abd).abd_offset, <,
@ -749,8 +749,8 @@ abd_get_offset_impl(abd_t *sabd, size_t off, size_t size)
abd->abd_u.abd_linear.abd_buf =
(char *)sabd->abd_u.abd_linear.abd_buf + off;
} else {
int i;
struct scatterlist *sg;
int i = 0;
struct scatterlist *sg = NULL;
size_t new_offset = sabd->abd_u.abd_scatter.abd_offset + off;
abd = abd_alloc_struct();

1
module/zfs/zfs_vnops.c
View File

@ -836,6 +836,7 @@ zfs_write(struct inode *ip, uio_t *uio, int ioflag, cred_t *cr)
aiov->iov_base != abuf->b_data)) {
ASSERT(xuio);
dmu_write(zfsvfs->z_os, zp->z_id, woff,
/* cppcheck-suppress nullPointer */
aiov->iov_len, aiov->iov_base, tx);
dmu_return_arcbuf(abuf);
xuio_stat_wbuf_copied();

2
module/zfs/zpl_xattr.c
View File

@ -333,7 +333,7 @@ zpl_xattr_get_sa(struct inode *ip, const char *name, void *value, size_t size)
if (error)
return (error);
if (!size)
if (size == 0 || value == NULL)
return (nv_size);
if (size < nv_size)

2
module/zfs/zvol.c
View File

@ -202,7 +202,7 @@ static zvol_state_t *
zvol_find_by_name_hash(const char *name, uint64_t hash, int mode)
{
zvol_state_t *zv;
struct hlist_node *p;
struct hlist_node *p = NULL;
mutex_enter(&zvol_state_lock);
hlist_for_each(p, ZVOL_HT_HEAD(hash)) {