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infra: fix KASAN splat during dealloc

This commit is contained in:
Thomas Schoebel-Theuer 2018-11-26 07:16:05 +01:00
parent 879c3f5dfd
commit a2031b1970
1 changed files with 8 additions and 1 deletions
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9
kernel/sy_old/sy_generic.c
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@ -1407,6 +1407,7 @@ int mars_dent_work(struct mars_global *global, char *dirname, int allocsize, mar
struct say_channel *say_channel = NULL; struct say_channel *say_channel = NULL;
struct list_head *tmp; struct list_head *tmp;
struct list_head *next; struct list_head *next;
struct list_head *prev;
int rounds = 0; int rounds = 0;
int status; int status;
int total_status = 0; int total_status = 0;
@ -1506,10 +1507,12 @@ restart:
bind_to_dent(NULL, &say_channel); bind_to_dent(NULL, &say_channel);
/* Remove all dents marked for removal. /* Remove all dents marked for removal.
* Needs to be done in reverse order because later d_parent pointers may
* reference earlier list members.
*/ */
down_write(&global->dent_mutex); down_write(&global->dent_mutex);
MARS_IO("removal pass\n"); MARS_IO("removal pass\n");
for (tmp = global->dent_anchor.next, next = tmp->next; tmp != &global->dent_anchor; tmp = next, next = next->next) { for (tmp = global->dent_anchor.prev, prev = tmp->prev; tmp != &global->dent_anchor; tmp = prev, prev = prev->prev) {
struct mars_dent *dent = container_of(tmp, struct mars_dent, dent_link); struct mars_dent *dent = container_of(tmp, struct mars_dent, dent_link);
if (!dent->d_killme) if (!dent->d_killme)
continue; continue;
@ -1686,6 +1689,10 @@ EXPORT_SYMBOL_GPL(mars_free_dent);
void mars_free_dent_all(struct mars_global *global, struct list_head *anchor) void mars_free_dent_all(struct mars_global *global, struct list_head *anchor)
{ {
LIST_HEAD(tmp_list); LIST_HEAD(tmp_list);
/* Needs to be done in reverse order because later d_parent pointers may
* reference earlier list members.
*/
if (global) if (global)
down_write(&global->dent_mutex); down_write(&global->dent_mutex);
list_replace_init(anchor, &tmp_list); list_replace_init(anchor, &tmp_list);