From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A6E25C6FA82 for ; Sun, 25 Sep 2022 17:29:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232234AbiIYR3p (ORCPT ); Sun, 25 Sep 2022 13:29:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48894 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232846AbiIYR3n (ORCPT ); Sun, 25 Sep 2022 13:29:43 -0400 Received: from mail-io1-f71.google.com (mail-io1-f71.google.com [209.85.166.71]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C6971219D for ; Sun, 25 Sep 2022 10:29:41 -0700 (PDT) Received: by mail-io1-f71.google.com with SMTP id u23-20020a6be917000000b0069f4854e11eso2598700iof.2 for ; Sun, 25 Sep 2022 10:29:41 -0700 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2022 10:29:41 -0700 (PDT) Date: Sun, 25 Sep 2022 10:29:41 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000091b65005e983c19d@google.com> Subject: [syzbot] KASAN: invalid-free in io_clean_op From: syzbot To: asml.silence@gmail.com, axboe@kernel.dk, io-uring@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: aaa11ce2ffc8 Add linux-next specific files for 20220923 git tree: linux-next console+strace: https://syzkaller.appspot.com/x/log.txt?x=1608cadf080000 kernel config: https://syzkaller.appspot.com/x/.config?x=186d1ff305f10294 dashboard link: https://syzkaller.appspot.com/bug?extid=edfd15cd4246a3fc615a 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=144acdef080000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10686540880000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+edfd15cd4246a3fc615a@syzkaller.appspotmail.com ================================================================== BUG: KASAN: double-free in slab_free mm/slub.c:3599 [inline] BUG: KASAN: double-free in __kmem_cache_free+0xab/0x3b0 mm/slub.c:3612 Free of addr ffff88801e642000 by task syz-executor374/3609 CPU: 0 PID: 3609 Comm: syz-executor374 Not tainted 6.0.0-rc6-next-20220923-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:284 [inline] print_report+0x15e/0x45d mm/kasan/report.c:395 kasan_report_invalid_free+0x97/0x1b0 mm/kasan/report.c:460 ____kasan_slab_free+0x185/0x1c0 mm/kasan/common.c:225 kasan_slab_free include/linux/kasan.h:177 [inline] slab_free_hook mm/slub.c:1669 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1695 slab_free mm/slub.c:3599 [inline] __kmem_cache_free+0xab/0x3b0 mm/slub.c:3612 io_clean_op+0x581/0xb10 io_uring/io_uring.c:1699 io_free_batch_list+0x46f/0x7e0 io_uring/io_uring.c:1305 __io_submit_flush_completions+0x22b/0x2e0 io_uring/io_uring.c:1343 io_submit_flush_completions io_uring/io_uring.c:171 [inline] ctx_flush_and_put+0xdf/0x1b0 io_uring/io_uring.c:1003 tctx_task_work+0x153/0x4a0 io_uring/io_uring.c:1087 task_work_run+0x16b/0x270 kernel/task_work.c:179 ptrace_notify+0x114/0x140 kernel/signal.c:2354 ptrace_report_syscall include/linux/ptrace.h:420 [inline] ptrace_report_syscall_exit include/linux/ptrace.h:482 [inline] syscall_exit_work kernel/entry/common.c:251 [inline] syscall_exit_to_user_mode_prepare+0x129/0x280 kernel/entry/common.c:278 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline] syscall_exit_to_user_mode+0x9/0x50 kernel/entry/common.c:296 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f10ee5d8bb9 Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fff7120f998 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: 00000000000040b2 RBX: 0000000000000003 RCX: 00007f10ee5d8bb9 RDX: 0000000000000000 RSI: 00000000000040b2 RDI: 0000000000000003 RBP: 00007f10ee59cd60 R08: 0000000020000000 R09: 0000000000000008 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f10ee59cdf0 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Allocated by task 3609: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:45 kasan_set_track+0x21/0x30 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:371 [inline] ____kasan_kmalloc mm/kasan/common.c:330 [inline] __kasan_kmalloc+0xa1/0xb0 mm/kasan/common.c:380 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slab_common.c:934 [inline] __kmalloc+0x54/0xc0 mm/slab_common.c:947 kmalloc include/linux/slab.h:564 [inline] io_alloc_async_data+0x9b/0x160 io_uring/io_uring.c:1590 io_msg_alloc_async io_uring/net.c:138 [inline] io_msg_alloc_async_prep io_uring/net.c:147 [inline] io_sendmsg_prep_async+0x19b/0x3c0 io_uring/net.c:221 io_req_prep_async+0x1d9/0x300 io_uring/io_uring.c:1613 io_submit_sqe io_uring/io_uring.c:2137 [inline] io_submit_sqes+0xfcd/0x1df0 io_uring/io_uring.c:2276 __do_sys_io_uring_enter+0xac6/0x2410 io_uring/io_uring.c:3216 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+0x63/0xcd Freed by task 3609: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:45 kasan_set_track+0x21/0x30 mm/kasan/common.c:52 kasan_save_free_info+0x2a/0x40 mm/kasan/generic.c:511 ____kasan_slab_free mm/kasan/common.c:236 [inline] ____kasan_slab_free+0x160/0x1c0 mm/kasan/common.c:200 kasan_slab_free include/linux/kasan.h:177 [inline] slab_free_hook mm/slub.c:1669 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1695 slab_free mm/slub.c:3599 [inline] __kmem_cache_free+0xab/0x3b0 mm/slub.c:3612 io_send_zc_cleanup+0x133/0x180 io_uring/net.c:916 io_clean_op+0xf4/0xb10 io_uring/io_uring.c:1684 io_free_batch_list+0x46f/0x7e0 io_uring/io_uring.c:1305 __io_submit_flush_completions+0x22b/0x2e0 io_uring/io_uring.c:1343 io_submit_flush_completions io_uring/io_uring.c:171 [inline] ctx_flush_and_put+0xdf/0x1b0 io_uring/io_uring.c:1003 tctx_task_work+0x153/0x4a0 io_uring/io_uring.c:1087 task_work_run+0x16b/0x270 kernel/task_work.c:179 ptrace_notify+0x114/0x140 kernel/signal.c:2354 ptrace_report_syscall include/linux/ptrace.h:420 [inline] ptrace_report_syscall_exit include/linux/ptrace.h:482 [inline] syscall_exit_work kernel/entry/common.c:251 [inline] syscall_exit_to_user_mode_prepare+0x129/0x280 kernel/entry/common.c:278 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline] syscall_exit_to_user_mode+0x9/0x50 kernel/entry/common.c:296 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff88801e642000 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 0 bytes inside of 512-byte region [ffff88801e642000, ffff88801e642200) The buggy address belongs to the physical page: page:ffffea0000799000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1e640 head:ffffea0000799000 order:2 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffff888011841c80 dead000000100010 0000000000000000 raw: 0000000000000000 dead000000000001 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 2, migratetype Unmovable, gfp_mask 0x52800(GFP_NOWAIT|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 1, tgid 1 (swapper/0), ts 7630490778, free_ts 0 prep_new_page mm/page_alloc.c:2538 [inline] get_page_from_freelist+0x1092/0x2d20 mm/page_alloc.c:4287 __alloc_pages+0x1c7/0x5a0 mm/page_alloc.c:5546 alloc_page_interleave+0x1e/0x200 mm/mempolicy.c:2113 alloc_pages+0x22f/0x270 mm/mempolicy.c:2275 alloc_slab_page mm/slub.c:1739 [inline] allocate_slab+0x213/0x300 mm/slub.c:1884 new_slab mm/slub.c:1937 [inline] ___slab_alloc+0xac1/0x1430 mm/slub.c:3119 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3217 slab_alloc_node mm/slub.c:3302 [inline] __kmem_cache_alloc_node+0x18a/0x3d0 mm/slub.c:3375 kmalloc_node_trace+0x1d/0x60 mm/slab_common.c:1027 kmalloc_node include/linux/slab.h:581 [inline] kzalloc_node include/linux/slab.h:706 [inline] iolatency_pd_alloc+0xc1/0x1c0 block/blk-iolatency.c:961 blkcg_activate_policy block/blk-cgroup.c:1425 [inline] blkcg_activate_policy+0x1e4/0xba0 block/blk-cgroup.c:1398 blk_iolatency_init+0x290/0x5e0 block/blk-iolatency.c:777 blkcg_init_queue+0x17d/0x620 block/blk-cgroup.c:1302 __alloc_disk_node+0x29d/0x650 block/genhd.c:1366 __blk_alloc_disk+0x35/0x90 block/genhd.c:1405 brd_alloc.part.0+0x281/0x760 drivers/block/brd.c:391 page_owner free stack trace missing Memory state around the buggy address: ffff88801e641f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88801e641f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88801e642000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88801e642080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88801e642100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== --- 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@googlegroups.com. 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