From 1e49b288cbb2ffa14b0031d8db77beef6e01974a Mon Sep 17 00:00:00 2001 From: Brian Behlendorf Date: Mon, 16 Dec 2019 15:49:28 -0800 Subject: [PATCH] cppcheck: (error) Null pointer dereference: who_perm As indicated by the VERIFY the local who_perm variable can never be NULL in parse_fs_perm(). Due to the existence of the is_set conditional, which is always true, cppcheck 1.88 was reporting a possible NULL reference. Resolve the issue by removing the extraneous is_set variable. Reviewed-by: Tony Hutter Signed-off-by: Brian Behlendorf Closes #9732 --- cmd/zfs/zfs_main.c | 86 ++++++++++++++++++++++------------------------ 1 file changed, 42 insertions(+), 44 deletions(-) diff --git a/cmd/zfs/zfs_main.c b/cmd/zfs/zfs_main.c index 6b1777907..e2e7f7bb7 100644 --- a/cmd/zfs/zfs_main.c +++ b/cmd/zfs/zfs_main.c @@ -5102,7 +5102,6 @@ parse_fs_perm(fs_perm_t *fsperm, nvlist_t *nvl) zfs_deleg_who_type_t perm_type = name[0]; char perm_locality = name[1]; const char *perm_name = name + 3; - boolean_t is_set = B_TRUE; who_perm_t *who_perm = NULL; assert('$' == name[2]); @@ -5132,57 +5131,56 @@ parse_fs_perm(fs_perm_t *fsperm, nvlist_t *nvl) assert(!"unhandled zfs_deleg_who_type_t"); } - if (is_set) { - who_perm_node_t *found_node = NULL; - who_perm_node_t *node = safe_malloc( - sizeof (who_perm_node_t)); - who_perm = &node->who_perm; - uu_avl_index_t idx = 0; + who_perm_node_t *found_node = NULL; + who_perm_node_t *node = safe_malloc( + sizeof (who_perm_node_t)); + who_perm = &node->who_perm; + uu_avl_index_t idx = 0; - uu_avl_node_init(node, &node->who_avl_node, avl_pool); - who_perm_init(who_perm, fsperm, perm_type, perm_name); + uu_avl_node_init(node, &node->who_avl_node, avl_pool); + who_perm_init(who_perm, fsperm, perm_type, perm_name); - if ((found_node = uu_avl_find(avl, node, NULL, &idx)) - == NULL) { - if (avl == fsperm->fsp_uge_avl) { - uid_t rid = 0; - struct passwd *p = NULL; - struct group *g = NULL; - const char *nice_name = NULL; + if ((found_node = uu_avl_find(avl, node, NULL, &idx)) + == NULL) { + if (avl == fsperm->fsp_uge_avl) { + uid_t rid = 0; + struct passwd *p = NULL; + struct group *g = NULL; + const char *nice_name = NULL; - switch (perm_type) { - case ZFS_DELEG_USER_SETS: - case ZFS_DELEG_USER: - rid = atoi(perm_name); - p = getpwuid(rid); - if (p) - nice_name = p->pw_name; - break; - case ZFS_DELEG_GROUP_SETS: - case ZFS_DELEG_GROUP: - rid = atoi(perm_name); - g = getgrgid(rid); - if (g) - nice_name = g->gr_name; - break; + switch (perm_type) { + case ZFS_DELEG_USER_SETS: + case ZFS_DELEG_USER: + rid = atoi(perm_name); + p = getpwuid(rid); + if (p) + nice_name = p->pw_name; + break; + case ZFS_DELEG_GROUP_SETS: + case ZFS_DELEG_GROUP: + rid = atoi(perm_name); + g = getgrgid(rid); + if (g) + nice_name = g->gr_name; + break; - default: - break; - } - - if (nice_name != NULL) - (void) strlcpy( - node->who_perm.who_ug_name, - nice_name, 256); + default: + break; } - uu_avl_insert(avl, node, idx); - } else { - node = found_node; - who_perm = &node->who_perm; + if (nice_name != NULL) + (void) strlcpy( + node->who_perm.who_ug_name, + nice_name, 256); } + + uu_avl_insert(avl, node, idx); + } else { + node = found_node; + who_perm = &node->who_perm; } - VERIFY3P(who_perm, !=, NULL); + + assert(who_perm != NULL); (void) parse_who_perm(who_perm, nvl2, perm_locality); }