We need to kfree() secondary algorithms names when reset zram device that had multi-streams, otherwise we leak memory. [senozhatsky@xxxxxxxxxxxx: kfree(NULL) is legal] Link: https://lkml.kernel.org/r/20240917013021.868769-1-senozhatsky@xxxxxxxxxxxx Link: https://lkml.kernel.org/r/20240911025600.3681789-1-senozhatsky@xxxxxxxxxxxx Fixes: 001d92735701 ("zram: add recompression algorithm sysfs knob") Signed-off-by: Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx> Cc: Minchan Kim <minchan@xxxxxxxxxx> Cc: <stable@xxxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> (cherry picked from commit 684826f8271ad97580b138b9ffd462005e470b99) Signed-off-by: Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx> --- drivers/block/zram/zram_drv.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c index 06673c6ca255..db729035fd6b 100644 --- a/drivers/block/zram/zram_drv.c +++ b/drivers/block/zram/zram_drv.c @@ -1983,6 +1983,11 @@ static void zram_destroy_comps(struct zram *zram) zcomp_destroy(comp); zram->num_active_comps--; } + + for (prio = ZRAM_SECONDARY_COMP; prio < ZRAM_MAX_COMPS; prio++) { + kfree(zram->comp_algs[prio]); + zram->comp_algs[prio] = NULL; + } } static void zram_reset_device(struct zram *zram) -- 2.47.0.rc0.187.ge670bccf7e-goog
