last executing test programs: kernel console output (not intermixed with test programs): Warning: Permanently added '[localhost]:62315' (ED25519) to the list of known hosts. syzkaller login: [ 349.072982][ T3176] cgroup: Unknown subsys name 'net' [ 349.996729][ T3176] cgroup: Unknown subsys name 'rlimit' Setting up swapspace version 1, size = 127995904 bytes [ 417.640239][ T3176] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 453.345529][ C0] Insufficient stack space to handle exception! [ 453.347582][ C0] Task stack: [0xff20000002c18000..0xff20000002c1c000] [ 453.348865][ C0] Overflow stack: [0xff6000006ec70070..0xff6000006ec71070] [ 453.350975][ C0] CPU: 0 UID: 0 PID: 1994 Comm: kworker/u9:6 Not tainted 6.11.0-rc2-syzkaller-g7c1e5b9690b0 #0 [ 453.353734][ C0] Hardware name: riscv-virtio,qemu (DT) [ 453.355512][ C0] Workqueue: events_unbound toggle_allocation_gate [ 453.359181][ C0] epc : mark_lock+0x2e/0x1b10 [ 453.361011][ C0] ra : __lock_acquire+0x1c2c/0x82d8 [ 453.362642][ C0] epc : ffffffff8022cb72 ra : ffffffff80230cec sp : ff1fffffffffff70 [ 453.364877][ C0] gp : ffffffff8954c0a0 tp : 0000000000000000 t0 : 1fec0000037ec7f3 [ 453.366737][ C0] t1 : ff6000001bf641f8 t2 : ff6000001bf63fa0 s0 : ff20000000000110 [ 453.368249][ C0] s1 : ffffffff89649840 a0 : ff6000001bf63480 a1 : ff6000001bf641f8 [ 453.370047][ C0] a2 : 0000000000000001 a3 : 0000000041b58ab3 a4 : 0000000000000000 [ 453.371514][ C0] a5 : ff200000000000a0 a6 : ffffffff8cd1c5a0 a7 : 0000000000000004 [ 453.372985][ C0] s2 : 000000000000000f s3 : ff6000006ec71484 s4 : ff200000000000a0 [ 453.374333][ C0] s5 : ffffffff8968bf60 s6 : ffffffff89584780 s7 : ff6000001bf63f84 [ 453.377433][ C0] s8 : 000000000000003f s9 : 0000000000000001 s10: ffffffff8968bf60 [ 453.378767][ C0] s11: ff6000001bf63480 t3 : ffffffff86257484 t4 : 1fec0000037ec7f0 [ 453.380191][ C0] t5 : 0000000000000000 t6 : 1fec0000037ec843 [ 453.381367][ C0] status: 0000000200000100 badaddr: ff1fffffffffffc0 cause: 000000000000000f [ 453.383420][ C0] Kernel panic - not syncing: Kernel stack overflow [ 453.385804][ C0] CPU: 0 UID: 0 PID: 1994 Comm: kworker/u9:6 Not tainted 6.11.0-rc2-syzkaller-g7c1e5b9690b0 #0 [ 453.388341][ C0] Hardware name: riscv-virtio,qemu (DT) [ 453.389536][ C0] Workqueue: events_unbound toggle_allocation_gate [ 453.391186][ C0] Call Trace: [ 453.392185][ C0] [] dump_backtrace+0x2e/0x3c [ 453.393720][ C0] [] show_stack+0x34/0x40 [ 453.395018][ C0] [] dump_stack_lvl+0x108/0x196 [ 453.396541][ C0] [] dump_stack+0x1c/0x24 [ 453.397979][ C0] [] panic+0x388/0x806 [ 453.399266][ C0] [] handle_bad_stack+0xe4/0x10c [ 453.400785][ C0] [] __lock_acquire+0x1c2c/0x82d8 [ 453.402841][ C0] SMP: stopping secondary CPUs [ 453.406121][ C0] Rebooting in 86400 seconds.. VM DIAGNOSIS: 09:15:28 Registers: info registers vcpu 0 CPU#0 V = 0 pc ffffffff81b0b9e8 mhartid 0000000000000000 mstatus 0000000a00000180 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 ffffffff8022cb72 vsepc 0000000000000000 mcause 0000000000000009 scause 000000000000000f vscause 0000000000000000 mtval 0000000000000000 stval ff1fffffffffffc0 htval 0000000000000000 mtval2 0000000000000000 mscratch 0000000080029000 sscratch 0000000000000000 satp a01270000009db67 x0/zero 0000000000000000 x1/ra ffffffff81b0b9be x2/sp ff6000006ec70720 x3/gp ffffffff8954c0a0 x4/tp ff6000001bf63480 x5/t0 552030203a555043 x6/t1 0000000000000001 x7/t2 49552030203a5550 x8/s0 ff6000006ec70760 x9/s1 ffffffff9088b3e0 x10/a0 ffffffff9088b428 x11/a1 000000000000001f x12/a2 0000000000000000 x13/a3 ffffffff81b0b9be x14/a4 1ffffffff2111685 x15/a5 ff200000000a5000 x16/a6 0000000000ff0100 x17/a7 0000000000000001 x18/s2 000000000000002e x19/s3 0000000000000000 x20/s4 0000000000000000 x21/s5 0000000000000000 x22/s6 0000000000000000 x23/s7 ffffffff906d4c14 x24/s8 dfffffff00000000 x25/s9 fffffffef2111687 x26/s10 0000000000000010 x27/s11 0000000000000010 x28/t3 ff6000001bf63488 x29/t4 0000000000000000 x30/t5 1fec0000037ec691 x31/t6 ffffffff906d4bb7 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 ffffffff802ac0d0 mhartid 0000000000000001 mstatus 0000000a000000a0 hstatus 0000000200000000 vsstatus 0000000a00000000 mip 0000000000000000 mie 000000000000022a mideleg 0000000000001666 hideleg 0000000000000000 medeleg 0000000000f0b509 hedeleg 0000000000000000 mtvec 0000000080000428 stvec ffffffff85f5b9a0 vstvec 0000000000000000 mepc ffffffff80413ebe sepc 00007fff9274bb88 vsepc 0000000000000000 mcause 8000000000000003 scause 000000000000000f vscause 0000000000000000 mtval 0000000000000000 stval 00007fff925aa000 htval 0000000000000000 mtval2 0000000000000000 mscratch 0000000080027000 sscratch 0000000000000000 satp a01270000009db67 x0/zero 0000000000000000 x1/ra ffffffff807f0772 x2/sp ff20000003ebbb90 x3/gp ffffffff8954c0a0 x4/tp ff60000011b64ec0 x5/t0 1fec00000236cb3b x6/t1 fffffffef20e9db3 x7/t2 ff60000011b659e0 x8/s0 ff20000003ebba00 x9/s1 0000000000000002 x10/a0 ff60000011b64ec0 x11/a1 ff60000011b65a08 x12/a2 1ffffffff19a96c7 x13/a3 ffffffff89648cc0 x14/a4 0000000000000000 x15/a5 0000000000000000 x16/a6 0000000000000003 x17/a7 0000000000000001 x18/s2 00000000248c3001 x19/s3 ff20000003ebbae0 x20/s4 ff60000017dba490 x21/s5 0000000000000000 x22/s6 ff20000003ebbcd0 x23/s7 00007fff925aa000 x24/s8 ff20000003ebbc70 x25/s9 1fe40000007d7758 x26/s10 ff20000003ebbae0 x27/s11 0040000000000000 x28/t3 ffffffff86257484 x29/t4 ffffffffb172ebfc x30/t5 ffffffff89655e40 x31/t6 1fec00000236cb45 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