[PATCH 4.4 23/97] ubi: fastmap: Dont flush fastmap work on detach

From: Greg Kroah-Hartman
Date: Sun Apr 22 2018 - 10:16:18 EST

4.4-stable review patch. If anyone has any objections, please let me know.


From: Richard Weinberger <richard@xxxxxx>

commit 29b7a6fa1ec07e8480b0d9caf635a4498a438bf4 upstream.

At this point UBI volumes have already been free()'ed and fastmap can no
longer access these data structures.

Reported-by: Martin Townsend <mtownsend1973@xxxxxxxxx>
Fixes: 74cdaf24004a ("UBI: Fastmap: Fix memory leaks while closing the WL sub-system")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Richard Weinberger <richard@xxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

drivers/mtd/ubi/fastmap-wl.c | 1 -
1 file changed, 1 deletion(-)

--- a/drivers/mtd/ubi/fastmap-wl.c
+++ b/drivers/mtd/ubi/fastmap-wl.c
@@ -360,7 +360,6 @@ static void ubi_fastmap_close(struct ubi
int i;

- flush_work(&ubi->fm_work);
return_unused_pool_pebs(ubi, &ubi->fm_pool);
return_unused_pool_pebs(ubi, &ubi->fm_wl_pool);