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Date: Thu, 21 Dec 2023 05:47:25 -0800 From: syzbot <syzbot+ec9b5cce58002d184fb6@...kaller.appspotmail.com> To: davem@...emloft.net, edumazet@...gle.com, jhs@...atatu.com, jiri@...nulli.us, kuba@...nel.org, linux-kernel@...r.kernel.org, netdev@...r.kernel.org, pabeni@...hat.com, syzkaller-bugs@...glegroups.com, vinicius.gomes@...el.com, xiyou.wangcong@...il.com Subject: [syzbot] [net?] WARNING: ODEBUG bug in advance_sched Hello, syzbot found the following issue on: HEAD commit: 1a44b0073b92 Merge tag 'ovl-fixes-6.7-rc7' of git://git.ke.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13ecdd9ee80000 kernel config: https://syzkaller.appspot.com/x/.config?x=314e9ad033a7d3a7 dashboard link: https://syzkaller.appspot.com/bug?extid=ec9b5cce58002d184fb6 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=12d5bc6ee80000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1465cbd6e80000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/56ceeac02b60/disk-1a44b007.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/74fea7b7a52f/vmlinux-1a44b007.xz kernel image: https://storage.googleapis.com/syzbot-assets/3757dfd10a24/bzImage-1a44b007.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+ec9b5cce58002d184fb6@...kaller.appspotmail.com ------------[ cut here ]------------ ODEBUG: activate active (active state 1) object: ffff88801f9b1d00 object type: rcu_head hint: 0x0 WARNING: CPU: 1 PID: 6703 at lib/debugobjects.c:514 debug_print_object+0x1a0/0x2a0 lib/debugobjects.c:514 Modules linked in: CPU: 1 PID: 6703 Comm: syz-executor263 Not tainted 6.7.0-rc6-syzkaller-00044-g1a44b0073b92 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 RIP: 0010:debug_print_object+0x1a0/0x2a0 lib/debugobjects.c:514 Code: fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 4c 48 8b 14 dd a0 0c 2f 8b 41 56 4c 89 e6 48 c7 c7 00 00 2f 8b e8 b1 66 e5 fc 90 <0f> 0b 90 90 58 83 05 38 1c b1 0a 01 48 83 c4 18 5b 5d 41 5c 41 5d RSP: 0018:ffffc900001f0bd8 EFLAGS: 00010086 RAX: 0000000000000000 RBX: 0000000000000003 RCX: ffffffff814db519 RDX: ffff888022be3b80 RSI: ffffffff814db526 RDI: 0000000000000001 RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: ffffffff8b2f06a0 R13: ffffffff8ace3260 R14: 0000000000000000 R15: ffff88801cc40ad0 FS: 0000555556866380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe6293cf2d0 CR3: 0000000028c3c000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <IRQ> debug_object_activate+0x327/0x490 lib/debugobjects.c:733 debug_rcu_head_queue kernel/rcu/rcu.h:227 [inline] __call_rcu_common.constprop.0+0x2c/0x7a0 kernel/rcu/tree.c:2666 switch_schedules net/sched/sch_taprio.c:210 [inline] advance_sched+0x59e/0xc60 net/sched/sch_taprio.c:984 __run_hrtimer kernel/time/hrtimer.c:1688 [inline] __hrtimer_run_queues+0x203/0xc20 kernel/time/hrtimer.c:1752 hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1814 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1065 [inline] __sysvec_apic_timer_interrupt+0x105/0x400 arch/x86/kernel/apic/apic.c:1082 sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1076 </IRQ> <TASK> asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649 RIP: 0010:__sanitizer_cov_trace_switch+0x3b/0x90 kernel/kcov.c:341 Code: 53 48 8b 46 08 48 83 f8 20 74 63 77 44 48 83 f8 08 74 53 48 83 f8 10 75 2f 41 bd 03 00 00 00 4c 8b 75 00 31 db 4d 85 f6 74 1e <48> 8b 74 dd 10 4c 89 e2 4c 89 ef 48 83 c3 01 48 8b 4c 24 28 e8 2c RSP: 0018:ffffc9000b956da0 EFLAGS: 00000202 RAX: 0000000000000000 RBX: 0000000000000006 RCX: ffffffff8139fcf5 RDX: ffff888022be3b80 RSI: 0000000000000007 RDI: 0000000000000001 RBP: ffffffff8ac9d140 R08: 0000000000000001 R09: 0000000000000007 R10: 0000000000000004 R11: 0000000000000001 R12: 0000000000000004 R13: 0000000000000001 R14: 0000000000000008 R15: ffffc9000b956e85 unwind_next_frame+0x6b5/0x2390 arch/x86/kernel/unwind_orc.c:515 arch_stack_walk+0xfa/0x170 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x96/0xd0 kernel/stacktrace.c:122 kasan_save_stack+0x33/0x50 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:522 ____kasan_slab_free mm/kasan/common.c:236 [inline] ____kasan_slab_free+0x15b/0x1b0 mm/kasan/common.c:200 kasan_slab_free include/linux/kasan.h:164 [inline] slab_free_hook mm/slub.c:1800 [inline] slab_free_freelist_hook+0x114/0x1e0 mm/slub.c:1826 slab_free mm/slub.c:3809 [inline] kmem_cache_free+0xf8/0x350 mm/slub.c:3831 kfree_skbmem+0xef/0x1b0 net/core/skbuff.c:1015 __kfree_skb net/core/skbuff.c:1073 [inline] consume_skb net/core/skbuff.c:1288 [inline] consume_skb+0xdf/0x170 net/core/skbuff.c:1282 netlink_broadcast_filtered+0x3e3/0xf20 net/netlink/af_netlink.c:1554 netlink_broadcast net/netlink/af_netlink.c:1576 [inline] nlmsg_multicast include/net/netlink.h:1090 [inline] nlmsg_notify+0x9e/0x220 net/netlink/af_netlink.c:2588 qdisc_notify.isra.0+0x1cd/0x330 net/sched/sch_api.c:1030 tc_modify_qdisc+0x914/0x1c40 net/sched/sch_api.c:1719 rtnetlink_rcv_msg+0x3c7/0xe00 net/core/rtnetlink.c:6558 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2545 netlink_unicast_kernel net/netlink/af_netlink.c:1342 [inline] netlink_unicast+0x53b/0x810 net/netlink/af_netlink.c:1368 netlink_sendmsg+0x93c/0xe40 net/netlink/af_netlink.c:1910 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0xd5/0x180 net/socket.c:745 ____sys_sendmsg+0x6ac/0x940 net/socket.c:2584 ___sys_sendmsg+0x135/0x1d0 net/socket.c:2638 __sys_sendmsg+0x117/0x1e0 net/socket.c:2667 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7fe62934e759 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 d1 19 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc987f8528 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 00007fe62934e759 RDX: 0000000004008000 RSI: 00000000200000c0 RDI: 0000000000000004 RBP: 00000000000f4240 R08: 0000000100000000 R09: 0000000100000000 R10: 0000000100000000 R11: 0000000000000246 R12: 00007ffc987f8580 R13: 00000000000454f4 R14: 00007ffc987f854c R15: 0000000000000003 </TASK> ---------------- Code disassembly (best guess): 0: 53 push %rbx 1: 48 8b 46 08 mov 0x8(%rsi),%rax 5: 48 83 f8 20 cmp $0x20,%rax 9: 74 63 je 0x6e b: 77 44 ja 0x51 d: 48 83 f8 08 cmp $0x8,%rax 11: 74 53 je 0x66 13: 48 83 f8 10 cmp $0x10,%rax 17: 75 2f jne 0x48 19: 41 bd 03 00 00 00 mov $0x3,%r13d 1f: 4c 8b 75 00 mov 0x0(%rbp),%r14 23: 31 db xor %ebx,%ebx 25: 4d 85 f6 test %r14,%r14 28: 74 1e je 0x48 * 2a: 48 8b 74 dd 10 mov 0x10(%rbp,%rbx,8),%rsi <-- trapping instruction 2f: 4c 89 e2 mov %r12,%rdx 32: 4c 89 ef mov %r13,%rdi 35: 48 83 c3 01 add $0x1,%rbx 39: 48 8b 4c 24 28 mov 0x28(%rsp),%rcx 3e: e8 .byte 0xe8 3f: 2c .byte 0x2c --- 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@...glegroups.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
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