From: Minchan Kim <[email protected]> Subject: zram: avoid null access when fail to alloc meta
zram_meta_alloc could fail so caller should check it. Otherwise, your system will hang. Signed-off-by: Minchan Kim <[email protected]> Acked-by: Jerome Marchand <[email protected]> Cc: <[email protected]> Signed-off-by: Andrew Morton <[email protected]> --- drivers/block/zram/zram_drv.c | 2 ++ 1 file changed, 2 insertions(+) diff -puN drivers/block/zram/zram_drv.c~zram-avoid-null-access-when-fail-to-alloc-meta drivers/block/zram/zram_drv.c --- a/drivers/block/zram/zram_drv.c~zram-avoid-null-access-when-fail-to-alloc-meta +++ a/drivers/block/zram/zram_drv.c @@ -612,6 +612,8 @@ static ssize_t disksize_store(struct dev disksize = PAGE_ALIGN(disksize); meta = zram_meta_alloc(disksize); + if (!meta) + return -ENOMEM; down_write(&zram->init_lock); if (zram->init_done) { up_write(&zram->init_lock); _ -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
