syzkaller login: ps_root_recvmsgcb: failed to send message to pid 2784: Connection refused [ 349.928721][ T2675] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 349.999193][ T2675] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. ps_root_recvmsgcb: failed to send message to pid 2780: Connection refused ps_root_recvmsgcb: failed to send message to pid 2794: Connection refused ps_root_recvmsgcb: failed to send message to pid 2795: Connection refused [ 381.685428][ T2843] warn_alloc: 5 callbacks suppressed [ 381.685797][ T2843] dhcpcd: vmalloc error: size 4096, vm_struct allocation failed, mode:0xcc0(GFP_KERNEL), nodemask=(null),cpuset=/,mems_allowed=0 [ 381.696462][ T2843] CPU: 0 PID: 2843 Comm: dhcpcd Tainted: G W 6.2.0-rc1-syzkaller #0 [ 381.698065][ T2843] Hardware name: riscv-virtio,qemu (DT) [ 381.699240][ T2843] Call Trace: [ 381.700316][ T2843] [] dump_backtrace+0x2e/0x3c [ 381.702015][ T2843] [] show_stack+0x34/0x40 [ 381.703516][ T2843] [] dump_stack_lvl+0xe0/0x14c [ 381.705057][ T2843] [] dump_stack+0x1c/0x24 [ 381.706599][ T2843] [] warn_alloc+0x168/0x22c [ 381.708095][ T2843] [] __vmalloc_node_range+0xb6c/0xdb4 [ 381.709699][ T2843] [] bpf_jit_alloc_exec+0x46/0x52 [ 381.711553][ T2843] [] bpf_jit_binary_alloc+0x96/0x13c [ 381.713177][ T2843] [] bpf_int_jit_compile+0x886/0xaa6 [ 381.714728][ T2843] [] bpf_prog_select_runtime+0x1a2/0x22e [ 381.716345][ T2843] [] bpf_migrate_filter+0x258/0x2be [ 381.717974][ T2843] [] bpf_prepare_filter+0x10e/0x1b4 [ 381.719673][ T2843] [] __get_filter+0x148/0x1a0 [ 381.721830][ T2843] [] sk_attach_filter+0x22/0x11a [ 381.723444][ T2843] [] sk_setsockopt+0x144e/0x270c [ 381.725066][ T2843] [] sock_setsockopt+0x48/0x58 [ 381.726660][ T2843] [] __sys_setsockopt+0x3f0/0x418 [ 381.728174][ T2843] [] sys_setsockopt+0x3a/0x4c [ 381.729655][ T2843] [] ret_from_syscall+0x0/0x2 [ 381.736644][ T2843] Mem-Info: [ 381.738057][ T2843] active_anon:1028 inactive_anon:41 isolated_anon:0 [ 381.738057][ T2843] active_file:0 inactive_file:4859 isolated_file:0 [ 381.738057][ T2843] unevictable:768 dirty:374 writeback:0 [ 381.738057][ T2843] slab_reclaimable:5081 slab_unreclaimable:18460 [ 381.738057][ T2843] mapped:1067 shmem:804 pagetables:99 [ 381.738057][ T2843] sec_pagetables:0 bounce:0 [ 381.738057][ T2843] kernel_misc_reclaimable:0 [ 381.738057][ T2843] free:281175 free_pcp:842 free_cma:4096 [ 381.778463][ T2843] Node 0 active_anon:4144kB inactive_anon:164kB active_file:0kB inactive_file:19476kB unevictable:3072kB isolated(anon):0kB isolated(file):0kB mapped:4268kB dirty:1536kB writeback:0kB shmem:3216kB writeback_tmp:0kB kernel_stack:4408kB pagetables:416kB sec_pagetables:0kB all_unreclaimable? no [ 381.794351][ T2843] Node 0 DMA32 free:1124700kB boost:0kB min:4656kB low:6012kB high:7368kB reserved_highatomic:0KB active_anon:4144kB inactive_anon:164kB active_file:0kB inactive_file:19476kB unevictable:3072kB writepending:1536kB present:2095104kB managed:1359004kB mlocked:0kB bounce:0kB free_pcp:3368kB local_pcp:1500kB free_cma:16384kB [ 381.798256][ T2843] lowmem_reserve[]: 0 0 0 [ 381.803566][ T2843] Node 0 DMA32: 1*4kB (U) 1*8kB (U) 1*16kB (M) 30*32kB (UE) 10*64kB (UE) 4*128kB (UME) 1*256kB (E) 0*512kB 2*1024kB (ME) 5*2048kB (UMEC) 271*4096kB (MC) = 1124700kB [ 381.825592][ T2843] Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB [ 381.827177][ T2843] Node 0 hugepages_total=4 hugepages_free=4 hugepages_surp=0 hugepages_size=2048kB [ 381.828706][ T2843] 5689 total pagecache pages [ 381.829849][ T2843] 0 pages in swap cache [ 381.842230][ T2843] Free swap = 0kB [ 381.843781][ T2843] Total swap = 0kB [ 381.844927][ T2843] 523776 pages RAM [ 381.846028][ T2843] 0 pages HighMem/MovableOnly [ 381.847175][ T2843] 184025 pages reserved [ 381.848254][ T2843] 4096 pages cma reserved ps_bpf_start_bpf: bpf_open: Unknown error 524 ps_root_recvmsg: Unknown error 524 ps_bpf_start_bpf: bpf_open: Unknown error 524 ps_root_recvmsg: Unknown error 524 ps_bpf_start_bpf: bpf_open: Unknown error 524 ps_root_recvmsg: Unknown error 524 ps_bpf_start_bpf: bpf_open: Unknown error 524 ps_root_recvmsg: Unknown error 524 Warning: Permanently added '[localhost]:40515' (ECDSA) to the list of known hosts. ps_root_recvmsgcb: failed to send message to pid 2843: Connection refused ps_root_recvmsgcb: failed to send message to pid 2844: Connection refused ps_root_recvmsgcb: failed to send message to pid 2845: Connection refused ps_root_recvmsgcb: failed to send message to pid 2846: Connection refused 1970/01/01 00:07:36 fuzzer started [ 915.073603][ T29] INFO: task syz-fuzzer:2855 blocked for more than 450 seconds. [ 915.079562][ T29] Tainted: G W 6.2.0-rc1-syzkaller #0 [ 915.114421][ T29] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 915.117125][ T29] task:syz-fuzzer state:D stack:0 pid:2855 ppid:2851 flags:0x00000000 [ 915.142142][ T29] Call Trace: [ 915.144208][ T29] [] __schedule+0x644/0x1274 [ 915.146645][ T29] [] schedule+0x7a/0x102 [ 915.148682][ T29] [] __down_read_common+0x4e8/0x80c [ 915.182250][ T29] [] down_read+0x48/0x54 [ 915.184652][ T29] [] do_page_fault+0x2b0/0xae8 [ 915.186736][ T29] [] ret_from_exception+0x0/0x1a [ 915.189897][ T29] [ 915.189897][ T29] Showing all locks held in the system: [ 915.214846][ T29] 1 lock held by rcu_tasks_kthre/12: [ 915.216981][ T29] #0: ffffffff8517bdd0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x34/0x6fe [ 915.242809][ T29] 1 lock held by rcu_tasks_trace/13: [ 915.245002][ T29] #0: ffffffff8517bb30 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x34/0x6fe [ 915.249717][ T29] 1 lock held by khungtaskd/29: [ 915.272082][ T29] #0: ffffffff8517b960 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x3c/0x20e [ 915.277366][ T29] 1 lock held by hwrng/674: [ 915.279179][ T29] #0: ffffffff854a12a8 (reading_mutex){+.+.}-{3:3}, at: hwrng_fillfn+0xd0/0x2c8 [ 915.306729][ T29] 2 locks held by getty/2802: [ 915.308532][ T29] #0: ff6000001352c098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3a/0x46 [ 915.335380][ T29] #1: ff2000000026b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xb9c/0xd0c [ 915.362414][ T29] 5 locks held by kworker/u4:0/2847: [ 915.364857][ T29] 1 lock held by syz-fuzzer/2853: [ 915.366691][ T29] 2 locks held by syz-fuzzer/2854: [ 915.368475][ T29] 1 lock held by syz-fuzzer/2855: [ 915.392066][ T29] #0: ff600000129dafc8 (&mm->mmap_lock){++++}-{3:3}, at: do_page_fault+0x2b0/0xae8 [ 915.397189][ T29] [ 915.398534][ T29] ============================================= [ 915.398534][ T29] [ 915.422893][ T29] Kernel panic - not syncing: hung_task: blocked tasks [ 915.425161][ T29] CPU: 1 PID: 29 Comm: khungtaskd Tainted: G W 6.2.0-rc1-syzkaller #0 [ 915.427437][ T29] Hardware name: riscv-virtio,qemu (DT) [ 915.428895][ T29] Call Trace: [ 915.430031][ T29] [] dump_backtrace+0x2e/0x3c [ 915.431903][ T29] [] show_stack+0x34/0x40 [ 915.433747][ T29] [] dump_stack_lvl+0xe0/0x14c [ 915.435673][ T29] [] dump_stack+0x1c/0x24 [ 915.437815][ T29] [] panic+0x272/0x650 [ 915.439777][ T29] [] touch_softlockup_watchdog+0x0/0x7a [ 915.442030][ T29] [] kthread+0x19c/0x1f8 [ 915.444080][ T29] [] ret_from_exception+0x0/0x1a [ 915.446584][ T29] SMP: stopping secondary CPUs [ 917.502109][ T29] SMP: failed to stop secondary CPUs 0-1 [ 917.505538][ T29] Rebooting in 86400 seconds.. VM DIAGNOSIS: 13:17:59 Registers: info registers vcpu 0 pc ffffffff804e66e2 mhartid 0000000000000000 mstatus 00000000000000a0 mip 00000000000002a2 mie 000000000000022a mideleg 0000000000000222 medeleg 000000000000b109 mtvec 0000000080000540 stvec ffffffff80005e88 mepc ffffffff804e66e2 sepc 0000000000076c58 mcause 8000000000000003 scause 0000000000000008 mtval 0000000000000000 stval 0000000000000000 x0/zero 0000000000000000 x1/ra ffffffff804e66a8 x2/sp ff20000004a97ae0 x3/gp ffffffff85efe540 x4/tp ff6000001036e200 x5/t0 ff20000004a97e00 x6/t1 00000000000f0000 x7/t2 0000000000000001 x8/s0 ff20000004a97b80 x9/s1 ff60000008338a00 x10/a0 0000000000000000 x11/a1 0000000000000007 x12/a2 1ffffffff0a4af8c x13/a3 ffffffff80cfe038 x14/a4 0000000000000000 x15/a5 0000000000000000 x16/a6 0000000000000003 x17/a7 0000000000000001 x18/s2 0000000000000a20 x19/s3 0000000000000000 x20/s4 0000000000000a20 x21/s5 ffffffff85f25740 x22/s6 ffffffff8007c510 x23/s7 0000000000000050 x24/s8 ffffffff85f04920 x25/s9 0000000000000b25 x26/s10 0000000000000000 x27/s11 0000000000000016 x28/t3 fffffffff3f3f300 x29/t4 fffffffef0a0eadf x30/t5 fffffffef0a0eae0 x31/t6 0000000000000000 f0/ft0 0000000000000000 f1/ft1 0000000000000000 f2/ft2 4120000000000000 f3/ft3 403a000000000000 f4/ft4 4110d36000000000 f5/ft5 40369d5d9fd5010b 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 ffffffff804ebe26 mhartid 0000000000000001 mstatus 00000000000001a0 mip 00000000000000a0 mie 000000000000020a mideleg 0000000000000222 medeleg 000000000000b109 mtvec 0000000080000540 stvec ffffffff80005e88 mepc ffffffff833eb86c sepc ffffffff80136010 mcause 8000000000000007 scause 8000000000000005 mtval 0000000000000000 stval 0000000000000000 x0/zero 0000000000000000 x1/ra ffffffff8012115c x2/sp ff200000003f7660 x3/gp ffffffff85efe540 x4/tp ff600000084d4980 x5/t0 0000000000046000 x6/t1 00000000000f0000 x7/t2 232072656c6c616b x8/s0 ff200000003f76e0 x9/s1 ffffffff85f26460 x10/a0 ffffffff85f26460 x11/a1 0000000000000003 x12/a2 1ffffffff0be02c0 x13/a3 ffffffff80121144 x14/a4 0000000000000004 x15/a5 0000000000000002 x16/a6 ffffffff8019dcaa x17/a7 0000000000010001 x18/s2 0000000000000001 x19/s3 ff600000084d4980 x20/s4 0000000000000002 x21/s5 0000000000000001 x22/s6 0000000000000000 x23/s7 ffffffff8019dcaa x24/s8 ff6000005a9e7828 x25/s9 ff6000005a9e7928 x26/s10 ffffffff85f26460 x27/s11 ff6000005a9e7708 x28/t3 fffffffff3f3f300 x29/t4 ffebffff0b53ced8 x30/t5 ffebffff0b53ced9 x31/t6 ffffffff87bc9598 f0/ft0 0000000000000000 f1/ft1 0000000000000000 f2/ft2 3f987b9081ab15e2 f3/ft3 3ff0000000000000 f4/ft4 3fd3333333333333 f5/ft5 4000000000000000 f6/ft6 4000000000000000 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