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| Kernel | Title | Rank 🛈 | Repro | Cause bisect | Fix bisect | Count | Last | Reported | Patched | Status |
|---|---|---|---|---|---|---|---|---|---|---|
| upstream | INFO: rcu detected stall in packet_sendmsg (2) net | 1 | 10 | 2049d | 2146d | 0/29 | auto-closed as invalid on 2020/05/03 17:34 | |||
| upstream | INFO: rcu detected stall in packet_sendmsg net | 1 | 10 | 2191d | 2197d | 13/29 | fixed on 2019/10/09 10:54 |
rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-....: (1 GPs behind) idle=933/1/0x4000000000000000 softirq=46297/46298 fqs=5249 (t=10502 jiffies g=66377 q=857) NMI backtrace for cpu 0 CPU: 0 PID: 20130 Comm: syz-executor.4 Not tainted 5.17.0-rc5-syzkaller-00021-g23d04328444a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: <IRQ> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x1e6/0x230 lib/nmi_backtrace.c:62 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_dump_cpu_stacks+0x25e/0x3f0 kernel/rcu/tree_stall.h:343 print_cpu_stall kernel/rcu/tree_stall.h:604 [inline] check_cpu_stall kernel/rcu/tree_stall.h:688 [inline] rcu_pending kernel/rcu/tree.c:3919 [inline] rcu_sched_clock_irq.cold+0x402/0x755 kernel/rcu/tree.c:2617 update_process_times+0x16d/0x200 kernel/time/timer.c:1785 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:226 tick_sched_timer+0x1b0/0x2d0 kernel/time/tick-sched.c:1428 __run_hrtimer kernel/time/hrtimer.c:1685 [inline] __hrtimer_run_queues+0x1c0/0xe50 kernel/time/hrtimer.c:1749 hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline] __sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1103 sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1097 </IRQ> <TASK> asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:check_kcov_mode+0x7/0x40 kernel/kcov.c:166 Code: 00 e9 59 fe ff ff 48 8b 7c 24 08 e8 c3 96 47 00 e9 61 fd ff ff cc cc cc cc cc cc cc cc cc cc cc cc cc cc 65 8b 05 a9 88 89 7e <89> c2 81 e2 00 01 00 00 a9 00 01 ff 00 74 10 31 c0 85 d2 74 15 8b RSP: 0018:ffffc9000f4ef440 EFLAGS: 00000246 RAX: 0000000000000201 RBX: 00000000000000aa RCX: 00000000000000aa RDX: 0000000000040000 RSI: ffff88807abad700 RDI: 0000000000000003 RBP: 0000000000000054 R08: 0000000000001fff R09: 0000000000000000 R10: ffffffff8761c401 R11: 0000000000000000 R12: ffff8880199f82c0 R13: 00000000000000a9 R14: 0000000000000000 R15: dffffc0000000000 write_comp_data kernel/kcov.c:221 [inline] __sanitizer_cov_trace_const_cmp4+0x1c/0x70 kernel/kcov.c:287 cake_heapify+0x221/0x3d0 net/sched/sch_cake.c:1434 cake_drop net/sched/sch_cake.c:1515 [inline] cake_enqueue+0x13b0/0x3a00 net/sched/sch_cake.c:1903 dev_qdisc_enqueue+0x40/0x300 net/core/dev.c:3668 __dev_xmit_skb net/core/dev.c:3756 [inline] __dev_queue_xmit+0x1f61/0x3660 net/core/dev.c:4081 packet_snd net/packet/af_packet.c:3057 [inline] packet_sendmsg+0x2226/0x52b0 net/packet/af_packet.c:3084 sock_sendmsg_nosec net/socket.c:705 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:725 ____sys_sendmsg+0x331/0x810 net/socket.c:2413 ___sys_sendmsg+0xf3/0x170 net/socket.c:2467 __sys_sendmmsg+0x195/0x470 net/socket.c:2553 __do_sys_sendmmsg net/socket.c:2582 [inline] __se_sys_sendmmsg net/socket.c:2579 [inline] __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2579 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+0x44/0xae RIP: 0033:0x7fe82c9bf059 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fe82b334168 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007fe82cad1f60 RCX: 00007fe82c9bf059 RDX: 0000000000000001 RSI: 0000000020003000 RDI: 0000000000000003 RBP: 00007fe82ca1908d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fe82d005b1f R14: 00007fe82b334300 R15: 0000000000022000 </TASK> ---------------- Code disassembly (best guess), 1 bytes skipped: 0: e9 59 fe ff ff jmpq 0xfffffe5e 5: 48 8b 7c 24 08 mov 0x8(%rsp),%rdi a: e8 c3 96 47 00 callq 0x4796d2 f: e9 61 fd ff ff jmpq 0xfffffd75 14: cc int3 15: cc int3 16: cc int3 17: cc int3 18: cc int3 19: cc int3 1a: cc int3 1b: cc int3 1c: cc int3 1d: cc int3 1e: cc int3 1f: cc int3 20: cc int3 21: cc int3 22: 65 8b 05 a9 88 89 7e mov %gs:0x7e8988a9(%rip),%eax # 0x7e8988d2 * 29: 89 c2 mov %eax,%edx <-- trapping instruction 2b: 81 e2 00 01 00 00 and $0x100,%edx 31: a9 00 01 ff 00 test $0xff0100,%eax 36: 74 10 je 0x48 38: 31 c0 xor %eax,%eax 3a: 85 d2 test %edx,%edx 3c: 74 15 je 0x53 3e: 8b .byte 0x8b
| Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2022/02/24 13:06 | upstream | 23d04328444a | b28851a4 | .config | console log | report | info | ci-upstream-kasan-gce | INFO: rcu detected stall in packet_sendmsg | |||
| 2022/05/23 13:04 | linux-next | cc63e8e92cb8 | 4c7657cb | .config | console log | report | info | ci-upstream-linux-next-kasan-gce-root | BUG: soft lockup in packet_sendmsg |