syzkaller login: [ 211.386273][ T1831] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 211.433092][ T1831] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 229.177760][ T1831] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 229.198721][ T1831] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. Warning: Permanently added '[localhost]:30184' (ECDSA) to the list of known hosts. 1970/01/01 00:04:26 fuzzer started 1970/01/01 00:04:38 dialing manager at localhost:37101 [ 283.622125][ T1998] cgroup: Unknown subsys name 'net' [ 284.482453][ T1998] cgroup: Unknown subsys name 'rlimit' 1970/01/01 00:04:44 syscalls: 2793 1970/01/01 00:04:44 code coverage: enabled 1970/01/01 00:04:44 comparison tracing: ioctl(KCOV_DISABLE) failed: invalid argument 1970/01/01 00:04:44 extra coverage: ioctl(KCOV_DISABLE) failed: invalid argument 1970/01/01 00:04:44 delay kcov mmap: mmap returned an invalid pointer 1970/01/01 00:04:44 setuid sandbox: enabled 1970/01/01 00:04:44 namespace sandbox: enabled 1970/01/01 00:04:44 Android sandbox: /sys/fs/selinux/policy does not exist 1970/01/01 00:04:44 fault injection: enabled 1970/01/01 00:04:44 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 1970/01/01 00:04:44 net packet injection: enabled 1970/01/01 00:04:44 net device setup: enabled 1970/01/01 00:04:44 concurrency sanitizer: /sys/kernel/debug/kcsan does not exist 1970/01/01 00:04:44 devlink PCI setup: PCI device 0000:00:10.0 is not available 1970/01/01 00:04:44 USB emulation: enabled 1970/01/01 00:04:44 hci packet injection: /dev/vhci does not exist 1970/01/01 00:04:44 wifi device emulation: /sys/class/mac80211_hwsim/ does not exist 1970/01/01 00:04:44 802.15.4 emulation: /sys/bus/platform/devices/mac802154_hwsim does not exist 1970/01/01 00:04:49 fetching corpus: 50, signal 34190/36036 (executing program) 1970/01/01 00:04:52 fetching corpus: 100, signal 46439/49948 (executing program) 1970/01/01 00:04:54 fetching corpus: 150, signal 54940/60067 (executing program) 1970/01/01 00:04:57 fetching corpus: 200, signal 62058/68715 (executing program) 1970/01/01 00:05:00 fetching corpus: 250, signal 69816/77907 (executing program) 1970/01/01 00:05:03 fetching corpus: 300, signal 74903/84481 (executing program) 1970/01/01 00:05:05 fetching corpus: 350, signal 79210/90205 (executing program) 1970/01/01 00:05:07 fetching corpus: 400, signal 82976/95406 (executing program) 1970/01/01 00:05:09 fetching corpus: 450, signal 87573/101338 (executing program) 1970/01/01 00:05:12 fetching corpus: 500, signal 91103/106191 (executing program) 1970/01/01 00:05:14 fetching corpus: 550, signal 93076/109537 (executing program) 1970/01/01 00:05:18 fetching corpus: 600, signal 95947/113720 (executing program) 1970/01/01 00:05:21 fetching corpus: 650, signal 98389/117460 (executing program) 1970/01/01 00:05:23 fetching corpus: 700, signal 100950/121346 (executing program) 1970/01/01 00:05:25 fetching corpus: 750, signal 104275/125865 (executing program) 1970/01/01 00:05:27 fetching corpus: 800, signal 105976/128867 (executing program) 1970/01/01 00:05:29 fetching corpus: 850, signal 107721/131898 (executing program) 1970/01/01 00:05:31 fetching corpus: 900, signal 110094/135418 (executing program) 1970/01/01 00:05:33 fetching corpus: 950, signal 112305/138755 (executing program) 1970/01/01 00:05:35 fetching corpus: 1000, signal 113990/141604 (executing program) 1970/01/01 00:05:38 fetching corpus: 1050, signal 115955/144732 (executing program) 1970/01/01 00:05:40 fetching corpus: 1100, signal 120030/149694 (executing program) 1970/01/01 00:05:42 fetching corpus: 1150, signal 121148/152036 (executing program) 1970/01/01 00:05:44 fetching corpus: 1200, signal 122447/154503 (executing program) 1970/01/01 00:05:46 fetching corpus: 1250, signal 124406/157568 (executing program) 1970/01/01 00:05:48 fetching corpus: 1300, signal 125338/159691 (executing program) 1970/01/01 00:05:49 fetching corpus: 1350, signal 127041/162438 (executing program) 1970/01/01 00:05:51 fetching corpus: 1400, signal 128490/164987 (executing program) 1970/01/01 00:05:53 fetching corpus: 1450, signal 130116/167690 (executing program) 1970/01/01 00:05:55 fetching corpus: 1500, signal 131964/170503 (executing program) 1970/01/01 00:05:56 fetching corpus: 1550, signal 133291/172895 (executing program) 1970/01/01 00:05:59 fetching corpus: 1600, signal 135338/175811 (executing program) 1970/01/01 00:06:01 fetching corpus: 1650, signal 136738/178218 (executing program) [ 901.938003][ C0] INFO: timekeeping: Cycle offset (5345590061) is larger than the 'riscv_clocksource' clock's 50% safety margin (4952755080) [ 901.938548][ C0] timekeeping: Your kernel is still fine, but is feeling a bit nervous [ 901.939966][ C1] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [ 901.948944][ C1] rcu: 0-...!: (484 ticks this GP) idle=de9/1/0x4000000000000004 softirq=9755/9758 fqs=0 [ 901.954248][ C1] (detected by 1, t=53457 jiffies, g=20821, q=2) [ 901.955894][ C1] Task dump for CPU 0: [ 901.957313][ C1] task:sshd state:R running task stack: 0 pid: 1988 ppid: 1952 flags:0x00000008 [ 901.960562][ C1] Call Trace: [ 901.961702][ C1] [] __schedule+0x506/0x1048 [ 901.964357][ C1] rcu: rcu_preempt kthread timer wakeup didn't happen for 53457 jiffies! g20821 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 [ 901.966321][ C1] rcu: Possible timer handling issue on cpu=1 timer-softirq=7136 [ 901.967898][ C1] rcu: rcu_preempt kthread starved for 53458 jiffies! g20821 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1 [ 901.970365][ C1] rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. [ 901.972375][ C1] rcu: RCU grace-period kthread stack dump: [ 901.973387][ C1] task:rcu_preempt state:I stack: 0 pid: 14 ppid: 2 flags:0x00000000 [ 901.975529][ C1] Call Trace: [ 901.976320][ C1] [] __schedule+0x506/0x1048 [ 901.978295][ C1] [] schedule+0x66/0x168 [ 901.980234][ C1] [] schedule_timeout+0xc2/0x180 [ 901.982146][ C1] [] rcu_gp_fqs_loop+0x1bc/0x4b6 [ 901.983564][ C1] [] rcu_gp_kthread+0x122/0x160 [ 901.985182][ C1] [] kthread+0x25c/0x2c6 [ 901.986397][ C1] [] ret_from_exception+0x0/0x14 [ 901.987781][ C1] rcu: Stack dump where RCU GP kthread last ran: [ 901.988727][ C1] Task dump for CPU 1: [ 901.989795][ C1] task:syz-fuzzer state:R running task stack: 0 pid: 1990 ppid: 1988 flags:0x00000004 [ 901.991837][ C1] Call Trace: [ 901.992553][ C1] [] dump_backtrace+0x2e/0x3c 1970/01/01 00:15:01 Manager.Poll call failed: read tcp 127.0.0.1:48328->127.0.0.1:37101: i/o timeout VM DIAGNOSIS: 15:29:09 Registers: info registers vcpu 0 pc ffffffff803f1888 mhartid 0000000000000000 mstatus 00000000000001a0 mip 00000000000000a0 mie 000000000000020a mideleg 0000000000000222 medeleg 000000000000b109 mtvec 0000000080000540 stvec ffffffff80005050 mepc ffffffff800d7a6c sepc ffffffff803eb3ea mcause 8000000000000003 scause 8000000000000005 mtval 0000000000000000 stval 0000000000000000 x0/zero 0000000000000000 x1/ra ffffffff800d661e x2/sp ffffffe00d2fe730 x3/gp ffffffff83f9a558 x4/tp ffffffe00c9c2f80 x5/t0 ffffffff83c59160 x6/t1 0000000000000001 x7/t2 ffffffffffffffff x8/s0 ffffffe00d2fe740 x9/s1 0000000000000008 x10/a0 ffffffff83fb0590 x11/a1 0000000000000007 x12/a2 1ffffffff07f60b2 x13/a3 ffffffff800d661e x14/a4 0000000000000000 x15/a5 ffffffff83fb0590 x16/a6 0000000000f00000 x17/a7 0000000000000000 x18/s2 ffffffe00c9c3930 x19/s3 ffffffe00c9c2f80 x20/s4 ffffffff83f9e0d0 x21/s5 0000000000000003 x22/s6 ffffffe00c9c3950 x23/s7 ffffffff83fb0590 x24/s8 ffffffff83fb0590 x25/s9 0000000000000100 x26/s10 ffffffe05adc8608 x27/s11 ffffffff85302728 x28/t3 ca94202dc7680400 x29/t4 ffffffc40b5bb321 x30/t5 ffffffc40b5bb322 x31/t6 ffffffff852c42fb f0/ft0 0000000000000000 f1/ft1 0000000000000000 f2/ft2 0000000000000000 f3/ft3 0000000000000000 f4/ft4 0000000000000000 f5/ft5 0000000000000000 f6/ft6 0000000000000000 f7/ft7 0000000000000000 f8/fs0 0000000000000000 f9/fs1 0000000000000000 f10/fa0 0000000000000000 f11/fa1 0000000000000000 f12/fa2 0000000000000000 f13/fa3 0000000000000000 f14/fa4 0000000000000000 f15/fa5 0000000000000000 f16/fa6 0000000000000000 f17/fa7 0000000000000000 f18/fs2 0000000000000000 f19/fs3 0000000000000000 f20/fs4 0000000000000000 f21/fs5 0000000000000000 f22/fs6 0000000000000000 f23/fs7 0000000000000000 f24/fs8 0000000000000000 f25/fs9 0000000000000000 f26/fs10 0000000000000000 f27/fs11 0000000000000000 f28/ft8 0000000000000000 f29/ft9 0000000000000000 f30/ft10 0000000000000000 f31/ft11 0000000000000000 info registers vcpu 1 pc ffffffff80c9697e mhartid 0000000000000001 mstatus 00000000000001a0 mip 00000000000000a0 mie 000000000000020a mideleg 0000000000000222 medeleg 000000000000b109 mtvec 0000000080000540 stvec ffffffff80005050 mepc ffffffff8009a296 sepc ffffffff8008a758 mcause 8000000000000007 scause 8000000000000005 mtval 0000000000000000 stval 0000000000000000 x0/zero 0000000000000000 x1/ra ffffffff80c9697e x2/sp ffffffe00d7770c0 x3/gp ffffffff83f9a558 x4/tp ffffffe00c9f17c0 x5/t0 ffffffff852b6bd7 x6/t1 0000000000000001 x7/t2 0000000000000000 x8/s0 ffffffe00d7770e0 x9/s1 ffffffff855344d0 x10/a0 ffffffd00066c005 x11/a1 0000000000000007 x12/a2 1ffffffff0aa68a3 x13/a3 ffffffff80c9697e x14/a4 0000000000000000 x15/a5 ffffffff85534518 x16/a6 0000000000f00000 x17/a7 ffffffff80ca117c x18/s2 0000000000000005 x19/s3 0000000000002710 x20/s4 ffffffff85534520 x21/s5 0000000000000020 x22/s6 ffffffff85534768 x23/s7 ffffffff85534528 x24/s8 0000000000000001 x25/s9 ffffffff83f9e0d0 x26/s10 ffffffff85534758 x27/s11 ffffffff85534520 x28/t3 ca94202dc7680400 x29/t4 ffffffc40b5beb21 x30/t5 ffffffc40b5beb22 x31/t6 ffffffff852b6bd7 f0/ft0 0000000000000000 f1/ft1 406c9ddbbc900149 f2/ft2 411eab8000000000 f3/ft3 403a000000000000 f4/ft4 41299d9000000000 f5/ft5 40362118b119b4f4 f6/ft6 3fe3b43109a0f415 f7/ft7 3fc203f759b70388 f8/fs0 3feb5a6ddee22549 f9/fs1 3f79d6ab2fbe7f80 f10/fa0 3fc15346326f93aa f11/fa1 0000000000000000 f12/fa2 0000000000000000 f13/fa3 0000000000000000 f14/fa4 0000000000000000 f15/fa5 0000000000000000 f16/fa6 0000000000000000 f17/fa7 0000000000000000 f18/fs2 0000000000000000 f19/fs3 0000000000000000 f20/fs4 0000000000000000 f21/fs5 0000000000000000 f22/fs6 0000000000000000 f23/fs7 0000000000000000 f24/fs8 0000000000000000 f25/fs9 0000000000000000 f26/fs10 0000000000000000 f27/fs11 0000000000000000 f28/ft8 0000000000000000 f29/ft9 0000000000000000 f30/ft10 0000000000000000 f31/ft11 0000000000000000