last executing test programs: kernel console output (not intermixed with test programs): Warning: Permanently added '[localhost]:51954' (ED25519) to the list of known hosts. syzkaller login: [ 312.079085][ T3170] cgroup: Unknown subsys name 'net' [ 312.936012][ T3170] cgroup: Unknown subsys name 'rlimit' Setting up swapspace version 1, size = 127995904 bytes [ 367.612479][ T3170] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 374.819961][ C0] Insufficient stack space to handle exception! [ 374.824035][ C0] Task stack: [0xff20000000110000..0xff20000000114000] [ 374.825606][ C0] Overflow stack: [0xff6000006ec70070..0xff6000006ec71070] [ 374.827860][ C0] CPU: 0 UID: 0 PID: 32 Comm: kworker/u9:2 Not tainted 6.11.0-rc2-syzkaller-g7c1e5b9690b0 #0 [ 374.830121][ C0] Hardware name: riscv-virtio,qemu (DT) [ 374.831855][ C0] Workqueue: events_unbound toggle_allocation_gate [ 374.835704][ C0] epc : __this_cpu_preempt_check+0x2/0x1e [ 374.837766][ C0] ra : lock_acquire.part.0+0x228/0x820 [ 374.839522][ C0] epc : ffffffff85f3bd84 ra : ffffffff8023961e sp : ff1fffffffffffa0 [ 374.841027][ C0] gp : ffffffff8954c0a0 tp : 0000000000000000 t0 : 0000000000000000 [ 374.842624][ C0] t1 : 0000000000000001 t2 : ff60000012e8d9e0 s0 : ff20000000000110 [ 374.844413][ C0] s1 : 0000000000000000 a0 : ffffffff8643eb20 a1 : ffffffff908a1980 [ 374.846083][ C0] a2 : 0000000000000305 a3 : 0000000000000000 a4 : ff60000012e8dec0 [ 374.847781][ C0] a5 : 0000000000000000 a6 : ffffffff808830c4 a7 : 0000000000000001 [ 374.849343][ C0] s2 : 0000000000000001 s3 : 0000000000000001 s4 : ff6000006ec8b118 [ 374.850928][ C0] s5 : 1fe4000000000000 s6 : 0000000000000000 s7 : ffffffff808830c4 [ 374.852605][ C0] s8 : 0000000000000000 s9 : ffffffff86257708 s10: ffffffff908a1980 [ 374.854741][ C0] s11: 0000000200000022 t3 : ff60000012e8cec8 t4 : 0000000000000000 [ 374.856401][ C0] t5 : 1fec0000025d19d9 t6 : ff20000000000aa0 [ 374.857889][ C0] status: 0000000200000100 badaddr: ff1fffffffffffa0 cause: 000000000000000f [ 374.860168][ C0] Kernel panic - not syncing: Kernel stack overflow [ 374.862526][ C0] CPU: 0 UID: 0 PID: 32 Comm: kworker/u9:2 Not tainted 6.11.0-rc2-syzkaller-g7c1e5b9690b0 #0 [ 374.867094][ C0] Hardware name: riscv-virtio,qemu (DT) [ 374.868507][ C0] Workqueue: events_unbound toggle_allocation_gate [ 374.870474][ C0] Call Trace: [ 374.871568][ C0] [] dump_backtrace+0x2e/0x3c [ 374.873198][ C0] [] show_stack+0x34/0x40 [ 374.874675][ C0] [] dump_stack_lvl+0x108/0x196 [ 374.876312][ C0] [] dump_stack+0x1c/0x24 [ 374.877834][ C0] [] panic+0x388/0x806 [ 374.879273][ C0] [] handle_bad_stack+0xe4/0x10c [ 374.880888][ C0] [] lock_acquire.part.0+0x228/0x820 [ 374.883022][ C0] SMP: stopping secondary CPUs [ 374.886939][ C0] Rebooting in 86400 seconds.. VM DIAGNOSIS: 20:01:23 Registers: info registers vcpu 0 CPU#0 V = 0 pc ffffffff81b09de8 mhartid 0000000000000000 mstatus 0000000a00000180 hstatus 0000000200000000 vsstatus 0000000a00000000 mip 0000000000000020 mie 000000000000022a mideleg 0000000000001666 hideleg 0000000000000000 medeleg 0000000000f0b509 hedeleg 0000000000000000 mtvec 0000000080000428 stvec ffffffff85f5b9a0 vstvec 0000000000000000 mepc ffffffff80007110 sepc ffffffff85f3bd84 vsepc 0000000000000000 mcause 8000000000000003 scause 000000000000000f vscause 0000000000000000 mtval 0000000000000000 stval ff1fffffffffffa0 htval 0000000000000000 mtval2 0000000000000000 mscratch 0000000080029000 sscratch 0000000000000000 satp a011f0000009d448 x0/zero 0000000000000000 x1/ra ffffffff81b09dc8 x2/sp ff6000006ec706b0 x3/gp ffffffff8954c0a0 x4/tp ff60000012e8cec0 x5/t0 1fec0000025d1b3b x6/t1 ff60000012e8dc60 x7/t2 ff60000012e8d9e0 x8/s0 ff6000006ec706e0 x9/s1 ffffffff9088b3e0 x10/a0 ff200000000a5005 x11/a1 000000000000001f x12/a2 0000000000000000 x13/a3 ffffffff81b09dc8 x14/a4 1ffffffff2111685 x15/a5 0000000000000000 x16/a6 0000000000ff0100 x17/a7 0000000000000002 x18/s2 0000000000000005 x19/s3 0000000000000000 x20/s4 0000000000000000 x21/s5 fffffffef21116d6 x22/s6 fffffffef21116d6 x23/s7 0000000000000003 x24/s8 fffffffef2111686 x25/s9 ffffffff9088b6b2 x26/s10 ffffffff9088b6b0 x27/s11 ffffffff9088b430 x28/t3 ffffffff86257484 x29/t4 0000000015c92991 x30/t5 ffffffff89655e40 x31/t6 1fec0000025d1b90 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 CPU#1 V = 0 pc ffffffff8000feb0 mhartid 0000000000000001 mstatus 0000000a000001a0 hstatus 0000000200000000 vsstatus 0000000a00000000 mip 0000000000000020 mie 000000000000022a mideleg 0000000000001666 hideleg 0000000000000000 medeleg 0000000000f0b509 hedeleg 0000000000000000 mtvec 0000000080000428 stvec ffffffff85f5b9a0 vstvec 0000000000000000 mepc ffffffff8001f472 sepc ffffffff80240204 vsepc 0000000000000000 mcause 0000000000000009 scause 8000000000000005 vscause 0000000000000000 mtval 0000000000000000 stval 0000000000000000 htval 0000000000000000 mtval2 0000000000000000 mscratch 0000000080027000 sscratch 0000000000000000 satp a011f0000009d448 x0/zero 0000000000000000 x1/ra ffffffff8000feb0 x2/sp ff2000000000b920 x3/gp ffffffff8954c0a0 x4/tp ff6000001a714ec0 x5/t0 0000000000046600 x6/t1 ffebffff0396b348 x7/t2 ff6000001a7159e0 x8/s0 ff2000000000b9a0 x9/s1 ff2000000000b9b0 x10/a0 ff2000000000b9a8 x11/a1 0000000000000000 x12/a2 0000000000000000 x13/a3 ffffffff8000feb0 x14/a4 0000000000000000 x15/a5 ff6000001a714ec0 x16/a6 0000000000ff0100 x17/a7 ff6000001cb59a43 x18/s2 ff2000000000b9a0 x19/s3 0000000000000000 x20/s4 ffffffff8000a6d6 x21/s5 0000000000000000 x22/s6 ffffffff85f397b4 x23/s7 dfffffff00000000 x24/s8 dfffffff00000000 x25/s9 ffffffff85f5b9a0 x26/s10 0000000000003fff x27/s11 ff2000000000b9b0 x28/t3 ffffffff86257484 x29/t4 ffebffff0396b348 x30/t5 ffebffff0396b349 x31/t6 1fec0000034e2b40 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