Commits
David Woodhouse authored and Greg Kroah-Hartman committed c3648f83496
JFFS2: Fix free space leak with in-band cleanmarkers We were accounting for the cleanmarker by calling jffs2_link_node_ref() (without locking!), which adjusted both superblock and per-eraseblock accounting, subtracting the size of the cleanmarker from {jeb,c}->free_size and adding it to {jeb,c}->used_size. But only _then_ were we adding the size of the newly-erased block back to the superblock counts, and we were adding each of jeb->{free,used}_size to the corresponding superblock counts. Thus, the size of the cleanmarker was effectively subtracted from the superblock's free_size _twice_. Fix this, by always adding a full eraseblock size to c->free_size when we've erased a block. And call jffs2_link_node_ref() under the proper lock, while we're at it. Thanks to Alexander Yurchenko and/or Damir Shayhutdinov for (almost) pinpointing the problem. [Backport of commit 014b164e1392a166fe96e003d2f0e7ad2e2a0bb7] Signed-off-by: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>