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[23.128.96.19]) by mx.google.com with ESMTPS id g12-20020a62e30c000000b0050844dbf352si7981871pfh.166.2022.04.22.11.54.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 22 Apr 2022 11:54:31 -0700 (PDT) Received-SPF: softfail (google.com: domain of transitioning linux-kernel-owner@vger.kernel.org does not designate 23.128.96.19 as permitted sender) client-ip=23.128.96.19; Authentication-Results: mx.google.com; spf=softfail (google.com: domain of transitioning linux-kernel-owner@vger.kernel.org does not designate 23.128.96.19 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=appspotmail.com Received: from out1.vger.email (out1.vger.email [IPv6:2620:137:e000::1:20]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 7FA0D180720; Fri, 22 Apr 2022 11:18:33 -0700 (PDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1382065AbiDTUYL (ORCPT + 99 others); Wed, 20 Apr 2022 16:24:11 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42208 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240148AbiDTUYJ (ORCPT ); Wed, 20 Apr 2022 16:24:09 -0400 Received: from mail-il1-f200.google.com (mail-il1-f200.google.com [209.85.166.200]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A2E7C424BC for ; Wed, 20 Apr 2022 13:21:21 -0700 (PDT) Received: by mail-il1-f200.google.com with SMTP id h14-20020a056e020d4e00b002cbcdda66ccso1539620ilj.6 for ; Wed, 20 Apr 2022 13:21:21 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:date:message-id:subject:from:to; bh=/7AzlNa8/FALVaRP572XGxvsULlwQnwZTl94YFSVfFY=; b=DT2Yh7SUkrOd35tPcW9bD9AFVH0d0a8x/VyHhc3EYLiqGRJ4unH6PRKIuUVbRLgLt/ aRUrBlDJj6COwNU/NpgWfhVNz8kSRVffx0ThlekVbfACVw2b3FudoKOVpHOAUSU9p8kp fXb1cSiqG9kf2vonIMSqgVFtCpAI/m+huRlKen8u7wwsc2b3wit/LbVZKar/FToQU9es VQSL2XYDoIOKYMSy5G49kxwYFzjF5j+CMCy1+AEoA4zLqKDdP9ol66pwZvIIi1ZMVoCe 2rnD4rMXGIna6557DybJbw5r7ed0hXlMJINRWx/NwGbj5v1nSd+Z3aOmy1L3xZDvzW3K EF4Q== X-Gm-Message-State: AOAM531zWVpMC3H4KTMosrQyVlkunlnEPa9Zchih6s+s65UonnmsAoVC 1CV+nvLUthew3r/cShgFUz3wnyob8SEP/Z6WLfnlSLhIU0g0 MIME-Version: 1.0 X-Received: by 2002:a05:6602:1403:b0:63d:715a:269b with SMTP id t3-20020a056602140300b0063d715a269bmr9912090iov.188.1650486080982; Wed, 20 Apr 2022 13:21:20 -0700 (PDT) Date: Wed, 20 Apr 2022 13:21:20 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000009054b205dd1bbcd5@google.com> Subject: [syzbot] KASAN: slab-out-of-bounds Read in __bfs (2) From: syzbot To: arnd@arndb.de, dinguyen@kernel.org, dvyukov@google.com, ebiederm@xmission.com, elver@google.com, linux-kernel@vger.kernel.org, shorne@gmail.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" X-Spam-Status: No, score=0.6 required=5.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,RDNS_NONE, SORTED_RECIPS,SPF_HELO_NONE autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: 0966d385830d riscv: Fix auipc+jalr relocation range checks git tree: git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes console output: https://syzkaller.appspot.com/x/log.txt?x=10bc68e8f00000 kernel config: https://syzkaller.appspot.com/x/.config?x=6295d67591064921 dashboard link: https://syzkaller.appspot.com/bug?extid=a7de825fb004b4dced19 compiler: riscv64-linux-gnu-gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 userspace arch: riscv64 Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+a7de825fb004b4dced19@syzkaller.appspotmail.com ================================================================== BUG: KASAN: slab-out-of-bounds in __bfs+0x154/0x394 kernel/locking/lockdep.c:1708 Read of size 8 at addr ffffaf801145fed0 by task syz-executor.1/6775 CPU: 1 PID: 6775 Comm: syz-executor.1 Not tainted 5.17.0-rc1-syzkaller-00002-g0966d385830d #0 Hardware name: riscv-virtio,qemu (DT) Call Trace: [] dump_backtrace+0x2e/0x3c arch/riscv/kernel/stacktrace.c:113 [] show_stack+0x34/0x40 arch/riscv/kernel/stacktrace.c:119 [] __dump_stack lib/dump_stack.c:88 [inline] [] dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:106 [] print_address_description.constprop.0+0x2a/0x330 mm/kasan/report.c:255 [] __kasan_report mm/kasan/report.c:442 [inline] [] kasan_report+0x184/0x1e0 mm/kasan/report.c:459 [] check_region_inline mm/kasan/generic.c:183 [inline] [] __asan_load8+0x6e/0x96 mm/kasan/generic.c:256 [] __bfs+0x154/0x394 kernel/locking/lockdep.c:1708 [] __bfs_forwards kernel/locking/lockdep.c:1803 [inline] [] check_path.constprop.0+0x24/0x46 kernel/locking/lockdep.c:2104 [] check_noncircular+0x11a/0x1fe kernel/locking/lockdep.c:2131 [] check_prev_add kernel/locking/lockdep.c:3063 [inline] [] check_prevs_add kernel/locking/lockdep.c:3186 [inline] [] validate_chain kernel/locking/lockdep.c:3801 [inline] [] __lock_acquire+0x19a4/0x333e kernel/locking/lockdep.c:5027 Allocated by task 1102416563: (stack is not available) Freed by task 6724: stack_trace_save+0xa6/0xd8 kernel/stacktrace.c:122 kasan_save_stack+0x2c/0x58 mm/kasan/common.c:38 kasan_set_track+0x1a/0x26 mm/kasan/common.c:45 kasan_set_free_info+0x1e/0x3a mm/kasan/generic.c:370 ____kasan_slab_free mm/kasan/common.c:366 [inline] ____kasan_slab_free+0x15e/0x180 mm/kasan/common.c:328 __kasan_slab_free+0x10/0x18 mm/kasan/common.c:374 kasan_slab_free include/linux/kasan.h:236 [inline] slab_free_hook mm/slub.c:1728 [inline] slab_free_freelist_hook+0x8e/0x1cc mm/slub.c:1754 slab_free mm/slub.c:3509 [inline] kmem_cache_free+0xca/0x482 mm/slub.c:3526 free_task_struct kernel/fork.c:176 [inline] free_task+0xac/0xd6 kernel/fork.c:472 __put_task_struct+0x160/0x242 kernel/fork.c:760 put_task_struct include/linux/sched/task.h:115 [inline] delayed_put_task_struct+0x2f0/0x394 kernel/exit.c:174 rcu_do_batch kernel/rcu/tree.c:2527 [inline] rcu_core+0x63c/0xf36 kernel/rcu/tree.c:2778 rcu_core_si+0xc/0x14 kernel/rcu/tree.c:2795 __do_softirq+0x274/0x8fc kernel/softirq.c:558 Last potentially related work creation: ------------[ cut here ]------------ slab index 1181800 out of bounds (419) for stack id 84520868 WARNING: CPU: 1 PID: 6775 at lib/stackdepot.c:304 stack_depot_fetch lib/stackdepot.c:304 [inline] WARNING: CPU: 1 PID: 6775 at lib/stackdepot.c:304 stack_depot_print+0x66/0x70 lib/stackdepot.c:276 Modules linked in: CPU: 1 PID: 6775 Comm: syz-executor.1 Not tainted 5.17.0-rc1-syzkaller-00002-g0966d385830d #0 Hardware name: riscv-virtio,qemu (DT) epc : stack_depot_fetch lib/stackdepot.c:304 [inline] epc : stack_depot_print+0x66/0x70 lib/stackdepot.c:276 ra : stack_depot_fetch lib/stackdepot.c:304 [inline] ra : stack_depot_print+0x66/0x70 lib/stackdepot.c:276 epc : ffffffff80c00b8a ra : ffffffff80c00b8a sp : ffffaf801145fc60 gp : ffffffff85863ac0 tp : ffffaf800e583080 t0 : ffffffff86bcb657 t1 : fffff5ef0b53c90c t2 : 0000000000000000 s0 : ffffaf801145fc70 s1 : ffffaf807ab248c0 a0 : 000000000000003c a1 : 00000000000f0000 a2 : 0000000000000104 a3 : ffffffff8012252a a4 : 36206938ade05e00 a5 : 36206938ade05e00 a6 : 0000000000f00000 a7 : ffffaf805a9e4863 s2 : ffffaf801145fed0 s3 : ffffaf800723ea00 s4 : ffffaf801145e100 s5 : ffffaf801145f840 s6 : ffffffff8588bb20 s7 : ffffffff85e09180 s8 : ffffaf801145fde0 s9 : ffffaf800e583bd8 s10: ffffffff85899680 s11: ffffaf800e583080 t3 : ffffffff801163b2 t4 : fffff5ef0b53c90c t5 : fffff5ef0b53c90d t6 : ffffaf801145f758 status: 0000000000000100 badaddr: 0000000000000000 cause: 0000000000000003 [] describe_object_stacks mm/kasan/report.c:216 [inline] [] describe_object mm/kasan/report.c:231 [inline] [] print_address_description.constprop.0+0x2fc/0x330 mm/kasan/report.c:263 [] __kasan_report mm/kasan/report.c:442 [inline] [] kasan_report+0x184/0x1e0 mm/kasan/report.c:459 [] check_region_inline mm/kasan/generic.c:183 [inline] [] __asan_load8+0x6e/0x96 mm/kasan/generic.c:256 [] __bfs+0x154/0x394 kernel/locking/lockdep.c:1708 [] __bfs_forwards kernel/locking/lockdep.c:1803 [inline] [] check_path.constprop.0+0x24/0x46 kernel/locking/lockdep.c:2104 [] check_noncircular+0x11a/0x1fe kernel/locking/lockdep.c:2131 [] check_prev_add kernel/locking/lockdep.c:3063 [inline] [] check_prevs_add kernel/locking/lockdep.c:3186 [inline] [] validate_chain kernel/locking/lockdep.c:3801 [inline] [] __lock_acquire+0x19a4/0x333e kernel/locking/lockdep.c:5027 irq event stamp: 435 hardirqs last enabled at (434): [] rmqueue_pcplist mm/page_alloc.c:3671 [inline] hardirqs last enabled at (434): [] rmqueue mm/page_alloc.c:3698 [inline] hardirqs last enabled at (434): [] get_page_from_freelist+0xfc8/0x12d8 mm/page_alloc.c:4162 hardirqs last disabled at (435): [] rmqueue_pcplist mm/page_alloc.c:3660 [inline] hardirqs last disabled at (435): [] rmqueue mm/page_alloc.c:3698 [inline] hardirqs last disabled at (435): [] get_page_from_freelist+0xfbe/0x12d8 mm/page_alloc.c:4162 softirqs last enabled at (376): [] rcu_read_unlock_bh include/linux/rcupdate.h:760 [inline] softirqs last enabled at (376): [] ip_finish_output2+0x540/0x1720 net/ipv4/ip_output.c:222 softirqs last disabled at (377): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (377): [] do_softirq kernel/softirq.c:459 [inline] softirqs last disabled at (377): [] do_softirq+0x158/0x15a kernel/softirq.c:446 ---[ end trace 0000000000000000 ]--- Second to last potentially related work creation: ------------[ cut here ]------------ slab index 2097151 out of bounds (419) for stack id ffffffff WARNING: CPU: 1 PID: 6775 at lib/stackdepot.c:304 stack_depot_fetch lib/stackdepot.c:304 [inline] WARNING: CPU: 1 PID: 6775 at lib/stackdepot.c:304 stack_depot_print+0x66/0x70 lib/stackdepot.c:276 Modules linked in: CPU: 1 PID: 6775 Comm: syz-executor.1 Tainted: G W 5.17.0-rc1-syzkaller-00002-g0966d385830d #0 Hardware name: riscv-virtio,qemu (DT) epc : stack_depot_fetch lib/stackdepot.c:304 [inline] epc : stack_depot_print+0x66/0x70 lib/stackdepot.c:276 ra : stack_depot_fetch lib/stackdepot.c:304 [inline] ra : stack_depot_print+0x66/0x70 lib/stackdepot.c:276 epc : ffffffff80c00b8a ra : ffffffff80c00b8a sp : ffffaf801145fc60 gp : ffffffff85863ac0 tp : ffffaf800e583080 t0 : ffffffff86bcb657 t1 : fffff5ef0b53c90c t2 : 0000000000000000 s0 : ffffaf801145fc70 s1 : ffffaf807ab248c0 a0 : 000000000000003c a1 : 00000000000f0000 a2 : 0000000000000104 a3 : ffffffff8012252a a4 : 36206938ade05e00 a5 : 36206938ade05e00 a6 : 0000000000f00000 a7 : ffffaf805a9e4863 s2 : ffffaf801145fed0 s3 : ffffaf800723ea00 s4 : ffffaf801145e100 s5 : ffffaf801145f840 s6 : ffffffff8588bb20 s7 : ffffffff85e09180 s8 : ffffaf801145fde0 s9 : ffffaf800e583bd8 s10: ffffffff85899680 s11: ffffaf800e583080 t3 : ffffffff801163b2 t4 : fffff5ef0b53c90c t5 : fffff5ef0b53c90d t6 : ffffaf801145f758 status: 0000000000000100 badaddr: 0000000000000000 cause: 0000000000000003 [] describe_object_stacks mm/kasan/report.c:221 [inline] [] describe_object mm/kasan/report.c:231 [inline] [] print_address_description.constprop.0+0x2ae/0x330 mm/kasan/report.c:263 [] __kasan_report mm/kasan/report.c:442 [inline] [] kasan_report+0x184/0x1e0 mm/kasan/report.c:459 [] check_region_inline mm/kasan/generic.c:183 [inline] [] __asan_load8+0x6e/0x96 mm/kasan/generic.c:256 [] __bfs+0x154/0x394 kernel/locking/lockdep.c:1708 [] __bfs_forwards kernel/locking/lockdep.c:1803 [inline] [] check_path.constprop.0+0x24/0x46 kernel/locking/lockdep.c:2104 [] check_noncircular+0x11a/0x1fe kernel/locking/lockdep.c:2131 [] check_prev_add kernel/locking/lockdep.c:3063 [inline] [] check_prevs_add kernel/locking/lockdep.c:3186 [inline] [] validate_chain kernel/locking/lockdep.c:3801 [inline] [] __lock_acquire+0x19a4/0x333e kernel/locking/lockdep.c:5027 irq event stamp: 435 hardirqs last enabled at (434): [] rmqueue_pcplist mm/page_alloc.c:3671 [inline] hardirqs last enabled at (434): [] rmqueue mm/page_alloc.c:3698 [inline] hardirqs last enabled at (434): [] get_page_from_freelist+0xfc8/0x12d8 mm/page_alloc.c:4162 hardirqs last disabled at (435): [] rmqueue_pcplist mm/page_alloc.c:3660 [inline] hardirqs last disabled at (435): [] rmqueue mm/page_alloc.c:3698 [inline] hardirqs last disabled at (435): [] get_page_from_freelist+0xfbe/0x12d8 mm/page_alloc.c:4162 softirqs last enabled at (376): [] rcu_read_unlock_bh include/linux/rcupdate.h:760 [inline] softirqs last enabled at (376): [] ip_finish_output2+0x540/0x1720 net/ipv4/ip_output.c:222 softirqs last disabled at (377): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (377): [] do_softirq kernel/softirq.c:459 [inline] softirqs last disabled at (377): [] do_softirq+0x158/0x15a kernel/softirq.c:446 ---[ end trace 0000000000000000 ]--- The buggy address belongs to the object at ffffaf801145e100 which belongs to the cache task_struct of size 5952 The buggy address is located 1680 bytes to the right of 5952-byte region [ffffaf801145e100, ffffaf801145f840) The buggy address belongs to the page: page:ffffaf807ab248c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x91658 head:ffffaf807ab248c0 order:3 compound_mapcount:0 compound_pincount:0 memcg:ffffaf8021359281 flags: 0x9000010200(slab|head|section=18|node=0|zone=0) raw: 0000009000010200 ffffaf807aaad940 0000000000000003 ffffaf800723ea00 raw: 0000000000000000 0000000000050005 00000001ffffffff ffffaf8021359281 raw: 00000000000007ff page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 3072, ts 1369164483600, free_ts 1354406359600 __set_page_owner+0x48/0x136 mm/page_owner.c:183 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0xd0/0x10a mm/page_alloc.c:2427 prep_new_page mm/page_alloc.c:2434 [inline] get_page_from_freelist+0x8da/0x12d8 mm/page_alloc.c:4165 __alloc_pages+0x150/0x3b6 mm/page_alloc.c:5389 alloc_pages+0x132/0x2a6 mm/mempolicy.c:2271 alloc_slab_page.constprop.0+0xc2/0xfa mm/slub.c:1799 allocate_slab mm/slub.c:1944 [inline] new_slab+0x25a/0x2cc mm/slub.c:2004 ___slab_alloc+0x56e/0x918 mm/slub.c:3018 __slab_alloc.constprop.0+0x50/0x8c mm/slub.c:3105 slab_alloc_node mm/slub.c:3196 [inline] kmem_cache_alloc_node+0x1f2/0x41c mm/slub.c:3266 alloc_task_struct_node kernel/fork.c:171 [inline] dup_task_struct kernel/fork.c:883 [inline] copy_process+0x203e/0x3c34 kernel/fork.c:1998 kernel_clone+0xee/0x920 kernel/fork.c:2555 __do_sys_clone+0xf2/0x12e kernel/fork.c:2672 sys_clone+0x32/0x44 kernel/fork.c:2640 ret_from_syscall+0x0/0x2 page last free stack trace: __reset_page_owner+0x4a/0xea mm/page_owner.c:142 reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1352 [inline] free_pcp_prepare+0x29c/0x45e mm/page_alloc.c:1404 free_unref_page_prepare mm/page_alloc.c:3325 [inline] free_unref_page+0x6a/0x31e mm/page_alloc.c:3404 free_the_page mm/page_alloc.c:706 [inline] __free_pages+0xe2/0x112 mm/page_alloc.c:5474 __free_slab+0x122/0x27c mm/slub.c:2028 free_slab mm/slub.c:2043 [inline] discard_slab+0x4c/0x7a mm/slub.c:2049 __slab_free+0x20a/0x29c mm/slub.c:3414 do_slab_free mm/slub.c:3497 [inline] ___cache_free+0x17c/0x354 mm/slub.c:3516 qlink_free mm/kasan/quarantine.c:157 [inline] qlist_free_all+0x7c/0x132 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x14c/0x1c8 mm/kasan/quarantine.c:283 __kasan_slab_alloc+0x5c/0x98 mm/kasan/common.c:446 kasan_slab_alloc include/linux/kasan.h:260 [inline] slab_post_alloc_hook mm/slab.h:732 [inline] slab_alloc_node mm/slub.c:3230 [inline] kmem_cache_alloc_node+0x368/0x41c mm/slub.c:3266 __alloc_skb+0x234/0x2e4 net/core/skbuff.c:414 alloc_skb_fclone include/linux/skbuff.h:1208 [inline] tcp_stream_alloc_skb+0x70/0x4c0 net/ipv4/tcp.c:861 tcp_sendmsg_locked+0x880/0x1d9e net/ipv4/tcp.c:1281 tcp_sendmsg+0x32/0x4e net/ipv4/tcp.c:1440 Memory state around the buggy address: ffffaf801145fd80: f1 f1 f1 f1 00 f3 f3 f3 fc fc fc fc fc fc fc fc ffffaf801145fe00: fc fc fc fc fc fc fc fc fc fc fc fc 00 00 00 00 >ffffaf801145fe80: f1 f1 f1 f1 00 f2 f2 f2 fc fc fc fc 00 00 00 f3 ^ ffffaf801145ff00: f3 f3 f3 f3 fc fc fc fc fc fc fc fc fc fc fc fc ffffaf801145ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== --- 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.