last executing test programs: kernel console output (not intermixed with test programs): Warning: Permanently added '[localhost]:32920' (ED25519) to the list of known hosts. syzkaller login: [ 172.417271][ T3171] cgroup: Unknown subsys name 'net' [ 172.823554][ T3171] cgroup: Unknown subsys name 'rlimit' Setting up swapspace version 1, size = 127995904 bytes [ 201.499854][ T3171] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 205.454622][ C0] Insufficient stack space to handle exception! [ 205.456698][ C0] Task stack: [0xff20000000238000..0xff2000000023c000] [ 205.457469][ C0] Overflow stack: [0xff6000006ec70070..0xff6000006ec71070] [ 205.458675][ C0] CPU: 0 UID: 0 PID: 53 Comm: kworker/u9:2 Not tainted 6.11.0-rc2-syzkaller-g7c1e5b9690b0 #0 [ 205.460002][ C0] Hardware name: riscv-virtio,qemu (DT) [ 205.460984][ C0] Workqueue: events_unbound toggle_allocation_gate [ 205.462955][ C0] epc : prepare_alloc_pages.constprop.0+0x2/0x502 [ 205.464059][ C0] ra : __alloc_pages_noprof+0x16c/0x2142 [ 205.465427][ C0] epc : ffffffff8087495e ra : ffffffff80885f7e sp : ff1fffffffffff10 [ 205.466381][ C0] gp : ffffffff8954c0a0 tp : 0000000000000000 t0 : ff20000000000500 [ 205.467273][ C0] t1 : 0000000000000008 t2 : ff600000136fa560 s0 : ff20000000000260 [ 205.468198][ C0] s1 : 0000000000000000 a0 : 0000000000092820 a1 : 0000000000000002 [ 205.469079][ C0] a2 : 0000000000000000 a3 : 0000000000000000 a4 : ff20000000000110 [ 205.469971][ C0] a5 : ff200000000000d0 a6 : ff200000000000c0 a7 : ffffffffce0f973e [ 205.470844][ C0] s2 : ff600000136f9a40 s3 : ffffffff87f5e460 s4 : ff200000000002e0 [ 205.471726][ C0] s5 : ffffffff87f5e464 s6 : 0000000000000002 s7 : 0000000000000000 [ 205.472595][ C0] s8 : 0000000000000002 s9 : 1ffffffff0febc8c s10: ff200000000001e0 [ 205.473480][ C0] s11: 1fe4000000000014 t3 : 0000000000000002 t4 : ffe37fff000d7b86 [ 205.474357][ C0] t5 : ffe37fff000d7b87 t6 : ff200000000006a0 [ 205.475462][ C0] status: 0000000200000120 badaddr: ff1fffffffffff80 cause: 000000000000000f [ 205.476735][ C0] Kernel panic - not syncing: Kernel stack overflow [ 205.477970][ C0] CPU: 0 UID: 0 PID: 53 Comm: kworker/u9:2 Not tainted 6.11.0-rc2-syzkaller-g7c1e5b9690b0 #0 [ 205.479349][ C0] Hardware name: riscv-virtio,qemu (DT) [ 205.480227][ C0] Workqueue: events_unbound toggle_allocation_gate [ 205.481206][ C0] Call Trace: [ 205.481817][ C0] [] dump_backtrace+0x2e/0x3c [ 205.482754][ C0] [] show_stack+0x34/0x40 [ 205.483599][ C0] [] dump_stack_lvl+0x108/0x196 [ 205.484559][ C0] [] dump_stack+0x1c/0x24 [ 205.485486][ C0] [] panic+0x388/0x806 [ 205.486307][ C0] [] handle_bad_stack+0xe4/0x10c [ 205.487206][ C0] [] __alloc_pages_noprof+0x16c/0x2142 [ 205.488408][ C0] SMP: stopping secondary CPUs [ 205.490294][ C0] Rebooting in 86400 seconds.. VM DIAGNOSIS: 12:37:38 Registers: info registers vcpu 0 CPU#0 V = 0 pc ffffffff80237bd8 mhartid 0000000000000000 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 ffffffff80007110 sepc ffffffff8087495e vsepc 0000000000000000 mcause 8000000000000003 scause 000000000000000f vscause 0000000000000000 mtval 0000000000000000 stval ff1fffffffffff80 htval 0000000000000000 mtval2 0000000000000000 mscratch 0000000080029000 sscratch 0000000000000000 satp a012300000097b25 x0/zero 0000000000000000 x1/ra ffffffff80237f18 x2/sp ff6000006ec70910 x3/gp ffffffff8954c0a0 x4/tp ff600000136f9a40 x5/t0 1fec0000026df4ab x6/t1 fffffffef0f9a460 x7/t2 ff600000136fa560 x8/s0 ff6000006ec70a30 x9/s1 1fec00000dd8e128 x10/a0 ff600000136fa55c x11/a1 ffffffff908a1980 x12/a2 0000000000000001 x13/a3 1ffffffff12c8ed0 x14/a4 ffffffff87cd2318 x15/a5 ffffffff8968c3e0 x16/a6 fffffffef0f9a461 x17/a7 ffffffff87cd2303 x18/s2 ffffffff908a1980 x19/s3 ffffffff87cd2318 x20/s4 ffffffff86257708 x21/s5 ffffffff85f4ceba x22/s6 0000000200000120 x23/s7 ff6000006ec709c0 x24/s8 ffffffff89584780 x25/s9 0000000000000000 x26/s10 ff200000000001e0 x27/s11 ffffffff89649740 x28/t3 ffffffff86257484 x29/t4 fffffffef0f9a460 x30/t5 fffffffef0f9a461 x31/t6 1fec0000026df4f1 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 ffffffff80240204 mhartid 0000000000000001 mstatus 0000000a000000a2 hstatus 0000000200000000 vsstatus 0000000a00000000 mip 0000000000000000 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 a011f00000099168 x0/zero 0000000000000000 x1/ra ffffffff8024019c x2/sp ff20000003e1b900 x3/gp ffffffff8954c0a0 x4/tp ff60000017ef9a40 x5/t0 1fec000002fdf4ab x6/t1 ffebffff035b8348 x7/t2 ff60000017efa560 x8/s0 ff20000003e1b960 x9/s1 ff6000001adc1a40 x10/a0 0000000000000001 x11/a1 0000000000000004 x12/a2 0000000000000001 x13/a3 ffffffff8024019c x14/a4 0000000000000000 x15/a5 00000000025c025a x16/a6 ffebffff035b8349 x17/a7 ff6000001adc1a43 x18/s2 ffebffff035b8348 x19/s3 ff6000001adc1a50 x20/s4 0000000000000000 x21/s5 ff6000001adc1a48 x22/s6 1fec0000035b834a x23/s7 0000000000000003 x24/s8 1fec0000035b8349 x25/s9 000000000000025b x26/s10 1fec0000035b8348 x27/s11 0000000000000000 x28/t3 ffffffff86257484 x29/t4 ffebffff035b8348 x30/t5 ffebffff035b8349 x31/t6 1fec000002fdf4b5 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