From mboxrd@z Thu Jan 1 00:00:00 1970 From: syzbot Subject: [syzbot] memory leak in blk_iolatency_init Date: Mon, 13 Sep 2021 16:28:24 -0700 Message-ID: <0000000000004ee28405cbe8d287@google.com> Mime-Version: 1.0 Return-path: List-ID: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: axboe-tSWWG44O7X1aa/9Udqfwiw@public.gmane.org, cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-block-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, syzkaller-bugs-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org, tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org Hello, syzbot found the following issue on: HEAD commit: a3fa7a101dcf Merge branches 'akpm' and 'akpm-hotfixes' (pa.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=12b4a5b3300000 kernel config: https://syzkaller.appspot.com/x/.config?x=9ee3a4c022ccbbca dashboard link: https://syzkaller.appspot.com/bug?extid=01321b15cc98e6bf96d6 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.1 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=148c170b300000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+01321b15cc98e6bf96d6-Pl5Pbv+GP7P466ipTTIvnc23WoclnBCfAL8bYrjMMd8@public.gmane.org 2021/09/09 22:14:31 executed programs: 444 BUG: memory leak unreferenced object 0xffff888129acdb80 (size 96): comm "syz-executor.1", pid 12661, jiffies 4294962682 (age 15.220s) hex dump (first 32 bytes): 20 47 c9 85 ff ff ff ff 20 d4 8e 29 81 88 ff ff G...... ..).... 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [] kmalloc include/linux/slab.h:591 [inline] [] kzalloc include/linux/slab.h:721 [inline] [] blk_iolatency_init+0x28/0x190 block/blk-iolatency.c:724 [] blkcg_init_queue+0xb4/0x1c0 block/blk-cgroup.c:1185 [] blk_alloc_queue+0x22a/0x2e0 block/blk-core.c:566 [] blk_mq_init_queue_data block/blk-mq.c:3100 [inline] [] __blk_mq_alloc_disk+0x25/0xd0 block/blk-mq.c:3124 [] loop_add+0x1c3/0x360 drivers/block/loop.c:2344 [] loop_control_get_free drivers/block/loop.c:2501 [inline] [] loop_control_ioctl+0x17e/0x2e0 drivers/block/loop.c:2516 [] vfs_ioctl fs/ioctl.c:51 [inline] [] __do_sys_ioctl fs/ioctl.c:874 [inline] [] __se_sys_ioctl fs/ioctl.c:860 [inline] [] __x64_sys_ioctl+0xfc/0x140 fs/ioctl.c:860 [] do_syscall_x64 arch/x86/entry/common.c:50 [inline] [] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 [] entry_SYSCALL_64_after_hwframe+0x44/0xae --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches