From: Nikos Tsironis <ntsironis@xxxxxxxxxxx> commit 64f2d15afe7b336aafebdcd14cc835ecf856df4b upstream. Fix the writeset tree equality test function to use the right value size when comparing two btree values. Fixes: eec40579d84873 ("dm: add era target") Cc: stable@xxxxxxxxxxxxxxx # v3.15+ Signed-off-by: Nikos Tsironis <ntsironis@xxxxxxxxxxx> Reviewed-by: Ming-Hung Tsai <mtsai@xxxxxxxxxx> Signed-off-by: Mike Snitzer <snitzer@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/md/dm-era-target.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/md/dm-era-target.c +++ b/drivers/md/dm-era-target.c @@ -388,7 +388,7 @@ static void ws_dec(void *context, const static int ws_eq(void *context, const void *value1, const void *value2) { - return !memcmp(value1, value2, sizeof(struct writeset_metadata)); + return !memcmp(value1, value2, sizeof(struct writeset_disk)); } /*----------------------------------------------------------------*/