On Thu, Sep 16, 2021 at 6:35 PM Hao Sun <sunhao.th@xxxxxxxxx> wrote: > > Hello, > > When using Healer to fuzz the latest Linux kernel, the following crash > was triggered. > This is a known problem, caused by recent changes from Vasily Averin. Thanks > HEAD commit: ff1ffd71d5f0 Merge tag 'hyperv-fixes-signed-20210915 > git tree: upstream > console output: > https://drive.google.com/file/d/108QvdldUg5-0Gc1q1OiJA4HqGmTTFK7a/view?usp=sharing > kernel config: https://drive.google.com/file/d/1zXpDhs-IdE7tX17B7MhaYP0VGUfP6m9B/view?usp=sharing > > Sorry, I don't have a reproducer for this crash, hope the symbolized > report can help. > If you fix this issue, please add the following tag to the commit: > Reported-by: Hao Sun <sunhao.th@xxxxxxxxx> > > ------------[ cut here ]------------ > WARNING: CPU: 3 PID: 0 at net/core/skbuff.c:5412 > skb_try_coalesce+0x11c6/0x1570 net/core/skbuff.c:5412 > Modules linked in: > CPU: 3 PID: 0 Comm: swapper/3 Not tainted 5.15.0-rc1+ #6 > Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS > 1.13.0-1ubuntu1.1 04/01/2014 > RIP: 0010:skb_try_coalesce+0x11c6/0x1570 net/core/skbuff.c:5412 > Code: 00 48 c1 e0 2a 48 c1 ea 03 80 3c 02 00 0f 85 50 01 00 00 49 8b > 84 24 c8 00 00 00 48 89 44 24 50 e9 4f f5 ff ff e8 4a b6 62 fa <0f> 0b > e9 6c f9 ff ff e8 3e b6 62 fa 48 8b 44 24 78 48 8d 70 ff 48 > RSP: 0018:ffffc900008a0368 EFLAGS: 00010246 > RAX: 0000000000000000 RBX: 00000000fffffea8 RCX: ffff888100159c80 > RDX: 0000000000000000 RSI: ffff888100159c80 RDI: 0000000000000002 > RBP: ffff88801a2b3400 R08: ffffffff87139896 R09: 00000000fffffea8 > R10: 0000000000000004 R11: ffffed1002fdfa89 R12: ffff88802be90780 > R13: ffff888017595ac0 R14: ffff88802be907fe R15: 0000000000000028 > FS: 0000000000000000(0000) GS:ffff888135d00000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 000055b9f8f7c488 CR3: 0000000111612000 CR4: 0000000000350ee0 > DR0: 00000000200002c0 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 > Call Trace: > <IRQ> > tcp_try_coalesce net/ipv4/tcp_input.c:4642 [inline] > tcp_try_coalesce+0x393/0x920 net/ipv4/tcp_input.c:4621 > tcp_queue_rcv+0x8a/0x710 net/ipv4/tcp_input.c:4905 > tcp_data_queue+0xb78/0x49e0 net/ipv4/tcp_input.c:5016 > tcp_rcv_established+0x944/0x2040 net/ipv4/tcp_input.c:5928 > tcp_v4_do_rcv+0x65e/0xb20 net/ipv4/tcp_ipv4.c:1694 > tcp_v4_rcv+0x37b4/0x4580 net/ipv4/tcp_ipv4.c:2087 > ip_protocol_deliver_rcu+0xa7/0xed0 net/ipv4/ip_input.c:204 > ip_local_deliver_finish+0x207/0x370 net/ipv4/ip_input.c:231 > NF_HOOK include/linux/netfilter.h:307 [inline] > NF_HOOK include/linux/netfilter.h:301 [inline] > ip_local_deliver+0x1c5/0x4e0 net/ipv4/ip_input.c:252 > dst_input include/net/dst.h:460 [inline] > ip_rcv_finish+0x1da/0x2f0 net/ipv4/ip_input.c:429 > NF_HOOK include/linux/netfilter.h:307 [inline] > NF_HOOK include/linux/netfilter.h:301 [inline] > ip_rcv+0xcd/0x3b0 net/ipv4/ip_input.c:540 > deliver_skb net/core/dev.c:2212 [inline] > deliver_ptype_list_skb net/core/dev.c:2227 [inline] > __netif_receive_skb_core+0x179d/0x3940 net/core/dev.c:5392 > __netif_receive_skb_one_core+0xae/0x180 net/core/dev.c:5434 > __netif_receive_skb+0x24/0x1c0 net/core/dev.c:5550 > process_backlog+0x223/0x770 net/core/dev.c:6427 > __napi_poll+0xb3/0x630 net/core/dev.c:6982 > napi_poll net/core/dev.c:7049 [inline] > net_rx_action+0x823/0xbc0 net/core/dev.c:7136 > __do_softirq+0x1d7/0x93b kernel/softirq.c:558 > invoke_softirq kernel/softirq.c:432 [inline] > __irq_exit_rcu kernel/softirq.c:636 [inline] > irq_exit_rcu+0xf2/0x130 kernel/softirq.c:648 > sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1097 > </IRQ> > asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 > RIP: 0010:default_idle+0xb/0x10 arch/x86/kernel/process.c:717 > Code: 3b 5f 88 f8 e9 6f fe ff ff e8 31 5f 88 f8 e9 3d fe ff ff e8 f7 > 30 fd ff cc cc cc cc cc cc cc eb 07 0f 00 2d a7 bf 50 00 fb f4 <c3> 0f > 1f 40 00 41 54 be 08 00 00 00 53 65 48 8b 1c 25 40 f0 01 00 > RSP: 0018:ffffc90000777de0 EFLAGS: 00000206 > RAX: 000000000090b2d1 RBX: 0000000000000003 RCX: ffffffff8932aef2 > RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 > RBP: 0000000000000003 R08: 0000000000000001 R09: ffffed1026ba6542 > R10: ffff888135d32a0b R11: ffffed1026ba6541 R12: 0000000000000003 > R13: 0000000000000003 R14: ffffffff8d6dbbd0 R15: 0000000000000000 > default_idle_call+0xc4/0x420 kernel/sched/idle.c:112 > cpuidle_idle_call kernel/sched/idle.c:194 [inline] > do_idle+0x3f9/0x570 kernel/sched/idle.c:306 > cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:403 > start_secondary+0x227/0x2f0 arch/x86/kernel/smpboot.c:270 > secondary_startup_64_no_verify+0xb0/0xbb > ---------------- > Code disassembly (best guess): > 0: 3b 5f 88 cmp -0x78(%rdi),%ebx > 3: f8 clc > 4: e9 6f fe ff ff jmpq 0xfffffe78 > 9: e8 31 5f 88 f8 callq 0xf8885f3f > e: e9 3d fe ff ff jmpq 0xfffffe50 > 13: e8 f7 30 fd ff callq 0xfffd310f > 18: cc int3 > 19: cc int3 > 1a: cc int3 > 1b: cc int3 > 1c: cc int3 > 1d: cc int3 > 1e: cc int3 > 1f: eb 07 jmp 0x28 > 21: 0f 00 2d a7 bf 50 00 verw 0x50bfa7(%rip) # 0x50bfcf > 28: fb sti > 29: f4 hlt > * 2a: c3 retq <-- trapping instruction > 2b: 0f 1f 40 00 nopl 0x0(%rax) > 2f: 41 54 push %r12 > 31: be 08 00 00 00 mov $0x8,%esi > 36: 53 push %rbx > 37: 65 48 8b 1c 25 40 f0 mov %gs:0x1f040,%rbx > 3e: 01 00
