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ubifs: Don't leak orphans on memory during commit 

If an orphan has child orphans (xattrs), and due
to a commit the parent orpahn cannot get free()'ed immediately,
put also all child orphans on the erase list.
Otherwise UBIFS will free() them only upon unmount and we
waste memory.

Fixes: 988bec4131 ("ubifs: orphan: Handle xattrs like files")
Signed-off-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
Richard Weinberger 2019-05-15 21:52:34 +02:00
parent ee1438ce5d
commit 8009ce956c
1 changed files with 24 additions and 26 deletions
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50
fs/ubifs/orphan.c
View File

@ -126,25 +126,11 @@ static void __orphan_drop(struct ubifs_info *c, struct ubifs_orphan *o)
kfree(o);
}
static void orphan_delete(struct ubifs_info *c, ino_t inum)
static void orphan_delete(struct ubifs_info *c, struct ubifs_orphan *orph)
{
struct ubifs_orphan *orph, *child_orph, *tmp_o;
spin_lock(&c->orphan_lock);
orph = lookup_orphan(c, inum);
if (!orph) {
spin_unlock(&c->orphan_lock);
ubifs_err(c, "missing orphan ino %lu", (unsigned long)inum);
dump_stack();
return;
}
if (orph->del) {
spin_unlock(&c->orphan_lock);
dbg_gen("deleted twice ino %lu",
(unsigned long)inum);
dbg_gen("deleted twice ino %lu", orph->inum);
return;
}
@ -153,19 +139,11 @@ static void orphan_delete(struct ubifs_info *c, ino_t inum)
orph->dnext = c->orph_dnext;
c->orph_dnext = orph;
spin_unlock(&c->orphan_lock);
dbg_gen("delete later ino %lu",
(unsigned long)inum);
dbg_gen("delete later ino %lu", orph->inum);
return;
}
list_for_each_entry_safe(child_orph, tmp_o, &orph->child_list, child_list) {
list_del(&child_orph->child_list);
__orphan_drop(c, child_orph);
}
__orphan_drop(c, orph);
spin_unlock(&c->orphan_lock);
}
/**
@ -223,7 +201,27 @@ int ubifs_add_orphan(struct ubifs_info *c, ino_t inum)
*/
void ubifs_delete_orphan(struct ubifs_info *c, ino_t inum)
{
orphan_delete(c, inum);
struct ubifs_orphan *orph, *child_orph, *tmp_o;
spin_lock(&c->orphan_lock);
orph = lookup_orphan(c, inum);
if (!orph) {
spin_unlock(&c->orphan_lock);
ubifs_err(c, "missing orphan ino %lu", (unsigned long)inum);
dump_stack();
return;
}
list_for_each_entry_safe(child_orph, tmp_o, &orph->child_list, child_list) {
list_del(&child_orph->child_list);
orphan_delete(c, child_orph);
}
orphan_delete(c, orph);
spin_unlock(&c->orphan_lock);
}
/**