last executing test programs: kernel console output (not intermixed with test programs): Warning: Permanently added '[localhost]:29576' (ED25519) to the list of known hosts. syzkaller login: [ 505.121955][ T3170] cgroup: Unknown subsys name 'net' [ 506.845587][ T3170] cgroup: Unknown subsys name 'rlimit' Setting up swapspace version 1, size = 127995904 bytes [ 597.829543][ T3170] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 610.909628][ C0] Insufficient stack space to handle exception! [ 610.911438][ C0] Task stack: [0xff20000004190000..0xff20000004194000] [ 610.912652][ C0] Overflow stack: [0xff6000006ec70070..0xff6000006ec71070] [ 610.916248][ C0] CPU: 0 UID: 0 PID: 3168 Comm: sshd Not tainted 6.11.0-rc2-syzkaller-g7c1e5b9690b0 #0 [ 610.918908][ C0] Hardware name: riscv-virtio,qemu (DT) [ 610.921329][ C0] epc : mark_lock+0x2e/0x1b10 [ 610.931776][ C0] ra : __lock_acquire+0x1be0/0x82d8 [ 610.935362][ C0] epc : ffffffff8022cb72 ra : ffffffff80230ca0 sp : ff1fffffffffff80 [ 610.938206][ C0] gp : ffffffff8954c0a0 tp : 0000000000000000 t0 : 1fec0000033de7f3 [ 610.940747][ C0] t1 : ff60000019ef4108 t2 : ff60000019ef3fa0 s0 : ff20000000000120 [ 610.945455][ C0] s1 : ffffffff89649840 a0 : ff60000019ef3480 a1 : ff60000019ef4108 [ 610.946979][ C0] a2 : 0000000000000000 a3 : 0000000041b58ab3 a4 : 0000000000000000 [ 610.948422][ C0] a5 : ff200000000000b0 a6 : ffffffff8cd1c5a0 a7 : 0000000000000004 [ 610.949683][ C0] s2 : 0000000000000009 s3 : ff6000006ec71484 s4 : ff200000000000a0 [ 610.950932][ C0] s5 : ffffffff8968bf60 s6 : ffffffff89584780 s7 : ff60000019ef3f84 [ 610.955635][ C0] s8 : 0000000000000002 s9 : 0000000000000001 s10: 0000000000001fff [ 610.957109][ C0] s11: ff60000019ef3480 t3 : ffffffff86257484 t4 : 1fec0000033de7f0 [ 610.958533][ C0] t5 : 0000000000000002 t6 : 1fec0000033de825 [ 610.959808][ C0] status: 0000000200000100 badaddr: ff1fffffffffffc0 cause: 000000000000000f [ 610.969479][ C0] Kernel panic - not syncing: Kernel stack overflow [ 610.981986][ C0] CPU: 0 UID: 0 PID: 3168 Comm: sshd Not tainted 6.11.0-rc2-syzkaller-g7c1e5b9690b0 #0 [ 610.983998][ C0] Hardware name: riscv-virtio,qemu (DT) [ 610.985133][ C0] Call Trace: [ 610.986190][ C0] [] dump_backtrace+0x2e/0x3c [ 610.987791][ C0] [] show_stack+0x34/0x40 [ 610.989101][ C0] [] dump_stack_lvl+0x108/0x196 [ 610.994721][ C0] [] dump_stack+0x1c/0x24 [ 610.996557][ C0] [] panic+0x388/0x806 [ 610.997862][ C0] [] handle_bad_stack+0xe4/0x10c [ 610.999392][ C0] [] __lock_acquire+0x1be0/0x82d8 [ 611.001401][ C0] SMP: stopping secondary CPUs [ 611.006515][ C0] Rebooting in 86400 seconds.. VM DIAGNOSIS: 14:52:59 Registers: info registers vcpu 0 CPU#0 V = 0 pc ffffffff85edc8e8 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 ffffffff8001f472 sepc ffffffff8022cb72 vsepc 0000000000000000 mcause 8000000000000003 scause 000000000000000f vscause 0000000000000000 mtval 0000000000000000 stval ff1fffffffffffc0 htval 0000000000000000 mtval2 0000000000000000 mscratch 0000000080029000 sscratch 0000000000000000 satp a011f00000097207 x0/zero 0000000000000000 x1/ra ffffffff85edc8e6 x2/sp ff6000006ec70de0 x3/gp ffffffff8954c0a0 x4/tp ff60000019ef3480 x5/t0 6100000000000000 x6/t1 ffebffff0dd8e2ea x7/t2 6170206c656e7265 x8/s0 ff6000006ec70ed0 x9/s1 0000000000000000 x10/a0 0000000000000001 x11/a1 0000000000000000 x12/a2 0000000000000000 x13/a3 ffffffff85edc8e6 x14/a4 0000000000000000 x15/a5 ff60000019ef3480 x16/a6 0000000000ff0100 x17/a7 ff6000006ec71753 x18/s2 0000000000000000 x19/s3 ffffffff896870e0 x20/s4 0000000000000077 x21/s5 ffffffffffffffff x22/s6 ffffffffffffffff x23/s7 ffffffffffffffff x24/s8 0000000000000002 x25/s9 0000000000000001 x26/s10 0000000000001fff x27/s11 ff60000019ef3480 x28/t3 ff60000019ef3488 x29/t4 ffebffff0dd8e2ea x30/t5 ffebffff0dd8e2eb x31/t6 ff6000006ec707f8 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 ffffffff8444d4c4 mhartid 0000000000000001 mstatus 0000000a000001a0 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 ffffffff801cec3a vsepc 0000000000000000 mcause 0000000000000009 scause 8000000000000005 vscause 0000000000000000 mtval 0000000000000000 stval 0000000000000000 htval 0000000000000000 mtval2 0000000000000000 mscratch 0000000080027000 sscratch 0000000000000000 satp a01230000009d754 x0/zero 0000000000000000 x1/ra ffffffff8444d4c4 x2/sp ff2000000000bd50 x3/gp ffffffff8954c0a0 x4/tp ff60000012288000 x5/t0 1fec000002451163 x6/t1 ff60000012288b20 x7/t2 ff60000012288b20 x8/s0 ff2000000000bd70 x9/s1 000000017235d58c x10/a0 00000000000156bd x11/a1 ff6000006eca4d40 x12/a2 000000000000001e x13/a3 ffffffff8444d4c4 x14/a4 0000000000000000 x15/a5 ff60000012288000 x16/a6 0000000000ff0100 x17/a7 000000000000000f x18/s2 00000000000156bd x19/s3 0000000000000000 x20/s4 000000000000001e x21/s5 000000000085e238 x22/s6 ffebffff0dd92cb4 x23/s7 0000000000000004 x24/s8 ff6000006ec96540 x25/s9 ff6000006ec96594 x26/s10 7fffffffffffffff x27/s11 1fec00000dd92ce5 x28/t3 ffffffff86257484 x29/t4 ffffffffffffffff x30/t5 ffffffff89655e40 x31/t6 1fec000002451168 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