Hello, syzbot found the following issue on: HEAD commit: feb9c5e19e91 Merge tag 'for_linus' of git://git.kernel.org.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=104f2666f00000 kernel config: https://syzkaller.appspot.com/x/.config?x=f33cdac6164584bd dashboard link: https://syzkaller.appspot.com/bug?extid=5d564137a4c4677abcf1 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12071811f00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16ffd166f00000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+5d564137a4c4677abcf1@xxxxxxxxxxxxxxxxxxxxxxxxx executing program BUG: memory leak unreferenced object 0xffff88810a36cc80 (size 64): comm "syz-executor844", pid 3616, jiffies 4294958438 (age 12.560s) hex dump (first 32 bytes): 80 99 ca 85 ff ff ff ff 40 16 93 04 81 88 ff ff ........@....... 03 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffff82338d25>] kmalloc include/linux/slab.h:581 [inline] [<ffffffff82338d25>] kzalloc include/linux/slab.h:714 [inline] [<ffffffff82338d25>] blk_ioprio_init+0x25/0xf0 block/blk-ioprio.c:233 [<ffffffff8233169d>] blkcg_init_queue+0xcd/0x1f0 block/blk-cgroup.c:1216 [<ffffffff82317c6e>] __alloc_disk_node+0x11e/0x230 block/genhd.c:1381 [<ffffffff82317db5>] __blk_alloc_disk+0x35/0x70 block/genhd.c:1421 [<ffffffff832f7574>] md_alloc+0x5d4/0x830 drivers/md/md.c:5697 [<ffffffff832f7839>] md_probe+0x69/0x70 drivers/md/md.c:5746 [<ffffffff8231858a>] blk_request_module+0x8a/0x110 block/genhd.c:716 [<ffffffff822e79f7>] blkdev_get_no_open+0x77/0xc0 block/bdev.c:737 [<ffffffff822e7a63>] blkdev_get_by_dev.part.0+0x23/0x520 block/bdev.c:794 [<ffffffff822e7fcb>] blkdev_get_by_dev+0x6b/0x80 block/bdev.c:850 [<ffffffff822e9337>] blkdev_open+0xb7/0x130 block/fops.c:498 [<ffffffff815b4be6>] do_dentry_open+0x1e6/0x650 fs/open.c:824 [<ffffffff815db0a1>] do_open fs/namei.c:3476 [inline] [<ffffffff815db0a1>] path_openat+0x18a1/0x1e70 fs/namei.c:3609 [<ffffffff815ddd71>] do_filp_open+0xc1/0x1b0 fs/namei.c:3636 [<ffffffff815b83bd>] do_sys_openat2+0xed/0x260 fs/open.c:1213 [<ffffffff815b8e0f>] do_sys_open fs/open.c:1229 [inline] [<ffffffff815b8e0f>] __do_sys_openat fs/open.c:1245 [inline] [<ffffffff815b8e0f>] __se_sys_openat fs/open.c:1240 [inline] [<ffffffff815b8e0f>] __x64_sys_openat+0x7f/0xe0 fs/open.c:1240 BUG: memory leak unreferenced object 0xffff88810f6c7780 (size 96): comm "syz-executor844", pid 3616, jiffies 4294958438 (age 12.560s) hex dump (first 32 bytes): c0 9f ca 85 ff ff ff ff 40 16 93 04 81 88 ff ff ........@....... 01 00 00 00 00 00 00 00 80 cc 36 0a 81 88 ff ff ..........6..... backtrace: [<ffffffff8233b228>] kmalloc include/linux/slab.h:581 [inline] [<ffffffff8233b228>] kzalloc include/linux/slab.h:714 [inline] [<ffffffff8233b228>] blk_iolatency_init+0x28/0x190 block/blk-iolatency.c:725 [<ffffffff823316f5>] blkcg_init_queue+0x125/0x1f0 block/blk-cgroup.c:1224 [<ffffffff82317c6e>] __alloc_disk_node+0x11e/0x230 block/genhd.c:1381 [<ffffffff82317db5>] __blk_alloc_disk+0x35/0x70 block/genhd.c:1421 [<ffffffff832f7574>] md_alloc+0x5d4/0x830 drivers/md/md.c:5697 [<ffffffff832f7839>] md_probe+0x69/0x70 drivers/md/md.c:5746 [<ffffffff8231858a>] blk_request_module+0x8a/0x110 block/genhd.c:716 [<ffffffff822e79f7>] blkdev_get_no_open+0x77/0xc0 block/bdev.c:737 [<ffffffff822e7a63>] blkdev_get_by_dev.part.0+0x23/0x520 block/bdev.c:794 [<ffffffff822e7fcb>] blkdev_get_by_dev+0x6b/0x80 block/bdev.c:850 [<ffffffff822e9337>] blkdev_open+0xb7/0x130 block/fops.c:498 [<ffffffff815b4be6>] do_dentry_open+0x1e6/0x650 fs/open.c:824 [<ffffffff815db0a1>] do_open fs/namei.c:3476 [inline] [<ffffffff815db0a1>] path_openat+0x18a1/0x1e70 fs/namei.c:3609 [<ffffffff815ddd71>] do_filp_open+0xc1/0x1b0 fs/namei.c:3636 [<ffffffff815b83bd>] do_sys_openat2+0xed/0x260 fs/open.c:1213 [<ffffffff815b8e0f>] do_sys_open fs/open.c:1229 [inline] [<ffffffff815b8e0f>] __do_sys_openat fs/open.c:1245 [inline] [<ffffffff815b8e0f>] __se_sys_openat fs/open.c:1240 [inline] [<ffffffff815b8e0f>] __x64_sys_openat+0x7f/0xe0 fs/open.c:1240 --- 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@xxxxxxxxxxxxxxxx. 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
