6.1-stable review patch. If anyone has any objections, please let me know.
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From: Kairui Song kasong@tencent.com
commit 212fe1c0df4a150fb6298db2cfff267ceaba5402 upstream.
If zram_meta_alloc failed early, it frees allocated zram->table without setting it NULL. Which will potentially cause zram_meta_free to access the table if user reset an failed and uninitialized device.
Link: https://lkml.kernel.org/r/20250107065446.86928-1-ryncsn@gmail.com Fixes: 74363ec674cb ("zram: fix uninitialized ZRAM not releasing backing device") Signed-off-by: Kairui Song kasong@tencent.com Reviewed-by: Sergey Senozhatsky senozhatsky@chromium.org Cc: stable@vger.kernel.org Signed-off-by: Andrew Morton akpm@linux-foundation.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/block/zram/zram_drv.c | 1 + 1 file changed, 1 insertion(+)
--- a/drivers/block/zram/zram_drv.c +++ b/drivers/block/zram/zram_drv.c @@ -1192,6 +1192,7 @@ static bool zram_meta_alloc(struct zram zram->mem_pool = zs_create_pool(zram->disk->disk_name); if (!zram->mem_pool) { vfree(zram->table); + zram->table = NULL; return false; }