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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 32119CDD543 for ; Wed, 18 Sep 2024 16:26:33 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 52D6C6B009F; Wed, 18 Sep 2024 12:26:32 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 4DC5E6B00A0; Wed, 18 Sep 2024 12:26:32 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 3A4776B00A1; Wed, 18 Sep 2024 12:26:32 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0012.hostedemail.com [216.40.44.12]) by kanga.kvack.org (Postfix) with ESMTP id 1F6626B009F for ; Wed, 18 Sep 2024 12:26:32 -0400 (EDT) Received: from smtpin05.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay08.hostedemail.com (Postfix) with ESMTP id 5F9E8140631 for ; Wed, 18 Sep 2024 16:26:31 +0000 (UTC) X-FDA: 82578386982.05.DFF1EBD Received: from mail-il1-f200.google.com (mail-il1-f200.google.com [209.85.166.200]) by imf24.hostedemail.com (Postfix) with ESMTP id 1D705180014 for ; Wed, 18 Sep 2024 16:26:27 +0000 (UTC) Authentication-Results: imf24.hostedemail.com; dkim=none; spf=pass (imf24.hostedemail.com: domain of 3M__qZgkbABwKQRC2DD6J2HHA5.8GG8D6MK6J4GFL6FL.4GE@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com designates 209.85.166.200 as permitted sender) smtp.mailfrom=3M__qZgkbABwKQRC2DD6J2HHA5.8GG8D6MK6J4GFL6FL.4GE@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; dmarc=fail reason="SPF not aligned (relaxed), No valid DKIM" header.from=appspotmail.com (policy=none) ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1726676639; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding:in-reply-to: references; bh=50Via4lDs7hgSe3eWefHgXEndW/SPYbDjscVk9lyg/Q=; b=dotOkFXXIr08fCRwg9EV0csDF1/URyCwfXPqtcweCVMBG176M4u0YHdIY1SDcNUzSVelfS Hyfr03lZ4mK+DpHjIDegdGvS06itmsekWo6g2UEvvDFlWsSDqihW/9xJ/xz6NEr4w0+D/e jy0qetsNbTSswkH0/11j/9oY58+sF0M= ARC-Authentication-Results: i=1; imf24.hostedemail.com; dkim=none; spf=pass (imf24.hostedemail.com: domain of 3M__qZgkbABwKQRC2DD6J2HHA5.8GG8D6MK6J4GFL6FL.4GE@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com designates 209.85.166.200 as permitted sender) smtp.mailfrom=3M__qZgkbABwKQRC2DD6J2HHA5.8GG8D6MK6J4GFL6FL.4GE@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; dmarc=fail reason="SPF not aligned (relaxed), No valid DKIM" header.from=appspotmail.com (policy=none) ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1726676639; a=rsa-sha256; cv=none; b=1QfcPUfuFPHr8lAJH9fjJLnCPxl5AYDjqflmm/4XUDFoAUf3l4x3QoWRnFmKXqDPzUXNet 1+HkK0jbO4RgYKyiGoBguNYQnFgXdoUsuMdbyu9SHogfWFsqcAplYOufSpeeS8jdfSpvrt HzwgKXXeGK/IsNDICuyMndLKzkkwarg= Received: by mail-il1-f200.google.com with SMTP id e9e14a558f8ab-39f5605c674so117384155ab.3 for ; Wed, 18 Sep 2024 09:26:27 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1726676787; x=1727281587; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=50Via4lDs7hgSe3eWefHgXEndW/SPYbDjscVk9lyg/Q=; b=RwyxomOgYy5Cu6yyK+hIVjVA45aMsnE1BoFHE5q25avXf/I7F114n9ytS/Y4xx+WLD SJAOEDdQk9R4GKHl4qjwkr4Y6424CMpBmVNFWpzp+pUOEMwiSfMqOcxVgMz8APDl+rGc yyRUx0Moa1aZ8uZQmJBJkFSbIhhcRvQIlt7WpkyvhL4pK6Kmz16IHVfHmOv6Zj9OCjuQ CJi97Rl3al1/M6HMcGEFulMhRouXr48xDZzzM39BAiMzamTN1/i9t07sjKiqd0CpQLXy m4fPqFEwylRxh/FIScIY4XSgU0z4L+6oApVsriWA4/r8GHouIsaRl9PQoZoFGPbWDDHJ nmtw== X-Forwarded-Encrypted: i=1; AJvYcCVS/gGh3t+BtlSQsD6N+TIuFiOSYYnHmEumchhReLYRCwlp+f88vHFXbiFm/dvQZ7aO5GmrtaKigQ==@kvack.org X-Gm-Message-State: AOJu0YxbB9ZMlymuK5i+NqucNiHoVGah3Ciy7BnomxB050Y+KmZWY6Tx S/3S/AMQL7HiL9z4CzuyaCizPMNnmpXqnL/uJDzzGgDQ11GpCYyCaEyYgkDrspX+RZ7CVhXNHpP D+BBoxrta7duwqozZdvyYxxrd91pbkuOwkUfS7FR+V3IIC/QrptyihxU= X-Google-Smtp-Source: AGHT+IFNJxhfAllkn3eld26n/5UqBGiUEpSyRnb5Hl5fm6nuV4N571yixac/ttacEgZ1NfctaoI8tTxbUIQK6IkXIoRb+0khrB99 MIME-Version: 1.0 X-Received: by 2002:a92:cdab:0:b0:3a0:bed3:80c8 with SMTP id e9e14a558f8ab-3a0bed3839bmr2960815ab.22.1726676787108; Wed, 18 Sep 2024 09:26:27 -0700 (PDT) Date: Wed, 18 Sep 2024 09:26:27 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000089afe20622674444@google.com> Subject: [syzbot] [mm?] KASAN: slab-use-after-free Read in shrinker_free From: syzbot To: akpm@linux-foundation.org, david@fromorbit.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, muchun.song@linux.dev, roman.gushchin@linux.dev, syzkaller-bugs@googlegroups.com, zhengqi.arch@bytedance.com Content-Type: text/plain; charset="UTF-8" X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: 1D705180014 X-Stat-Signature: bqu9pnit7641ro9743gsjpeyqrbw5r3g X-Rspam-User: X-HE-Tag: 1726676787-664736 X-HE-Meta: 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 hYrE/ZBV 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 ak1gwmFs /vwF3E9uO3n5jmZQmLxFc5ejc5lDkDyiCyad6QhbPvzaTRqwE5x6WFtXyAF7i6gVrvmEKdC9sl0+jpKyc37DqwUswNd0nuJH6BJHLhl6dxXyQC6ocrui9g6O3nhB0r9QU8Xlixm0C86RBI/xqAqOR8TiEDSFYeG7mZp5v+FyZFGB48rGTM3gfeBM6uNTmir6683AwD48P/h3BDlZR6nxzuwnhkB4IGqMvTXIcuziGF2ftGZ65r0lVvyRvM5bLduA87e4r6L4Sd8gwPl309rcDJwmL/zDCc2tV6BFi185s478ztUO6Jy2FKHb4Dyrb6hUF9butUMKnSVLUenGH66maz0Ct+rB8WPQZ+aGfd+W6BSXDPI1nQQ5jDz1/c6Jzm+tPTncfz6yf9Kw/qBw7hLiaucB1JCv7etx X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hello, syzbot found the following issue on: HEAD commit: 57719771a244 Merge tag 'sound-6.11' of git://git.kernel.or.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=122c17c7980000 kernel config: https://syzkaller.appspot.com/x/.config?x=96be9a618e50f19f dashboard link: https://syzkaller.appspot.com/bug?extid=6926ab9f6f7d7b50002e compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1559749f980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1359749f980000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/87498efcab61/disk-57719771.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/5703d19e746c/vmlinux-57719771.xz kernel image: https://storage.googleapis.com/syzbot-assets/3744ba66862a/bzImage-57719771.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+6926ab9f6f7d7b50002e@syzkaller.appspotmail.com svc: failed to register nfsdv3 RPC service (errno 512). svc: failed to register nfsaclv3 RPC service (errno 512). ================================================================== BUG: KASAN: slab-use-after-free in shrinker_free+0x3b7/0x430 mm/shrinker.c:775 Read of size 4 at addr ffff8880206cbb1c by task syz-executor313/5320 CPU: 0 UID: 0 PID: 5320 Comm: syz-executor313 Not tainted 6.11.0-rc7-syzkaller-00145-g57719771a244 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Call Trace: __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:119 print_address_description mm/kasan/report.c:377 [inline] print_report+0xc3/0x620 mm/kasan/report.c:488 kasan_report+0xd9/0x110 mm/kasan/report.c:601 shrinker_free+0x3b7/0x430 mm/shrinker.c:775 nfsd_file_cache_shutdown+0xbc/0x480 fs/nfsd/filecache.c:891 nfsd_shutdown_generic fs/nfsd/nfssvc.c:329 [inline] nfsd_shutdown_generic fs/nfsd/nfssvc.c:323 [inline] nfsd_startup_net fs/nfsd/nfssvc.c:444 [inline] nfsd_svc+0x6d4/0x970 fs/nfsd/nfssvc.c:817 nfsd_nl_threads_set_doit+0x52c/0xbc0 fs/nfsd/nfsctl.c:1714 genl_family_rcv_msg_doit+0x202/0x2f0 net/netlink/genetlink.c:1115 genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline] genl_rcv_msg+0x565/0x800 net/netlink/genetlink.c:1210 netlink_rcv_skb+0x165/0x410 net/netlink/af_netlink.c:2550 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] ____sys_sendmsg+0x9b4/0xb50 net/socket.c:2597 ___sys_sendmsg+0x135/0x1e0 net/socket.c:2651 __sys_sendmsg+0x117/0x1f0 net/socket.c:2680 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f51ae6e5ab9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 11 1d 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f51ae634158 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f51ae768438 RCX: 00007f51ae6e5ab9 RDX: 0000000000000004 RSI: 0000000020000280 RDI: 0000000000000003 RBP: 00007f51ae768430 R08: 0000000000000008 R09: 0000000000000000 R10: 0000000000000003 R11: 0000000000000246 R12: 00007f51ae76843c R13: 000000000000006e R14: 00007ffc1415e4a0 R15: 00007ffc1415e588 Allocated by task 5309: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:370 [inline] __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:387 kmalloc_noprof include/linux/slab.h:681 [inline] kzalloc_noprof include/linux/slab.h:807 [inline] shrinker_alloc+0xf8/0xb00 mm/shrinker.c:683 nfsd_file_cache_init+0x152/0x450 fs/nfsd/filecache.c:743 nfsd_startup_generic fs/nfsd/nfssvc.c:307 [inline] nfsd_startup_net fs/nfsd/nfssvc.c:402 [inline] nfsd_svc+0x542/0x970 fs/nfsd/nfssvc.c:817 nfsd_nl_threads_set_doit+0x52c/0xbc0 fs/nfsd/nfsctl.c:1714 genl_family_rcv_msg_doit+0x202/0x2f0 net/netlink/genetlink.c:1115 genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline] genl_rcv_msg+0x565/0x800 net/netlink/genetlink.c:1210 netlink_rcv_skb+0x165/0x410 net/netlink/af_netlink.c:2550 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] ____sys_sendmsg+0x9b4/0xb50 net/socket.c:2597 ___sys_sendmsg+0x135/0x1e0 net/socket.c:2651 __sys_sendmsg+0x117/0x1f0 net/socket.c:2680 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 0: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579 poison_slab_object+0xf7/0x160 mm/kasan/common.c:240 __kasan_slab_free+0x32/0x50 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2256 [inline] slab_free mm/slub.c:4477 [inline] kfree+0x12a/0x3b0 mm/slub.c:4598 rcu_do_batch kernel/rcu/tree.c:2569 [inline] rcu_core+0x828/0x16b0 kernel/rcu/tree.c:2843 handle_softirqs+0x216/0x8f0 kernel/softirq.c:554 __do_softirq kernel/softirq.c:588 [inline] invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu kernel/softirq.c:637 [inline] irq_exit_rcu+0xbb/0x120 kernel/softirq.c:649 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 Last potentially related work creation: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 __kasan_record_aux_stack+0xba/0xd0 mm/kasan/generic.c:541 __call_rcu_common.constprop.0+0x9a/0x790 kernel/rcu/tree.c:3106 shrinker_free+0xfe/0x430 mm/shrinker.c:807 nfsd_file_cache_shutdown+0xbc/0x480 fs/nfsd/filecache.c:891 nfsd_shutdown_generic fs/nfsd/nfssvc.c:329 [inline] nfsd_shutdown_generic fs/nfsd/nfssvc.c:323 [inline] nfsd_startup_net fs/nfsd/nfssvc.c:444 [inline] nfsd_svc+0x6d4/0x970 fs/nfsd/nfssvc.c:817 nfsd_nl_threads_set_doit+0x52c/0xbc0 fs/nfsd/nfsctl.c:1714 genl_family_rcv_msg_doit+0x202/0x2f0 net/netlink/genetlink.c:1115 genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline] genl_rcv_msg+0x565/0x800 net/netlink/genetlink.c:1210 netlink_rcv_skb+0x165/0x410 net/netlink/af_netlink.c:2550 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] ____sys_sendmsg+0x9b4/0xb50 net/socket.c:2597 ___sys_sendmsg+0x135/0x1e0 net/socket.c:2651 __sys_sendmsg+0x117/0x1f0 net/socket.c:2680 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff8880206cbb00 which belongs to the cache kmalloc-192 of size 192 The buggy address is located 28 bytes inside of freed 192-byte region [ffff8880206cbb00, ffff8880206cbbc0) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x206cb flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: 0xfdffffff(slab) raw: 00fff00000000000 ffff88801ac413c0 dead000000000100 dead000000000122 raw: 0000000000000000 0000000080100010 00000001fdffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x52cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 1, tgid 1 (swapper/0), ts 4560085887, free_ts 0 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1500 prep_new_page mm/page_alloc.c:1508 [inline] get_page_from_freelist+0x1351/0x2e50 mm/page_alloc.c:3446 __alloc_pages_noprof+0x22b/0x2460 mm/page_alloc.c:4702 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] alloc_pages_node_noprof include/linux/gfp.h:296 [inline] alloc_slab_page+0x4e/0xf0 mm/slub.c:2325 allocate_slab mm/slub.c:2488 [inline] new_slab+0x84/0x260 mm/slub.c:2541 ___slab_alloc+0xdac/0x1870 mm/slub.c:3727 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3817 __slab_alloc_node mm/slub.c:3870 [inline] slab_alloc_node mm/slub.c:4029 [inline] __kmalloc_cache_noprof+0x2c5/0x310 mm/slub.c:4188 kmalloc_noprof include/linux/slab.h:681 [inline] kzalloc_noprof include/linux/slab.h:807 [inline] call_usermodehelper_setup+0x9a/0x340 kernel/umh.c:363 kobject_uevent_env+0xde3/0x1670 lib/kobject_uevent.c:628 kset_register+0x1b6/0x2b0 lib/kobject.c:877 class_register+0x22e/0x340 drivers/base/class.c:203 typec_init+0x63/0x110 drivers/usb/typec/class.c:2518 do_one_initcall+0x128/0x630 init/main.c:1267 do_initcall_level init/main.c:1329 [inline] do_initcalls init/main.c:1345 [inline] do_basic_setup init/main.c:1364 [inline] kernel_init_freeable+0x660/0xc50 init/main.c:1578 kernel_init+0x1c/0x2b0 init/main.c:1467 page_owner free stack trace missing Memory state around the buggy address: ffff8880206cba00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880206cba80: 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8880206cbb00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880206cbb80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff8880206cbc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== --- 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. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup