last executing test programs: kernel console output (not intermixed with test programs): Warning: Permanently added '[localhost]:40210' (ED25519) to the list of known hosts. syzkaller login: [ 332.087193][ T3176] cgroup: Unknown subsys name 'net' [ 333.039408][ T3176] cgroup: Unknown subsys name 'rlimit' Setting up swapspace version 1, size = 127995904 bytes [ 387.675929][ T3176] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 396.393662][ C0] Insufficient stack space to handle exception! [ 396.397264][ C0] Task stack: [0xff20000000088000..0xff2000000008c000] [ 396.398860][ C0] Overflow stack: [0xff6000006ec70070..0xff6000006ec71070] [ 396.402282][ C0] CPU: 0 UID: 0 PID: 16 Comm: ksoftirqd/0 Not tainted 6.11.0-rc2-syzkaller-g7c1e5b9690b0 #0 [ 396.404498][ C0] Hardware name: riscv-virtio,qemu (DT) [ 396.406069][ C0] epc : lock_acquire.part.0+0x2e/0x820 [ 396.410093][ C0] ra : lock_acquire+0x74/0x98 [ 396.411434][ C0] epc : ffffffff80239424 ra : ffffffff80239c8a sp : ff20000000087fa0 [ 396.412477][ C0] gp : ffffffff8954c0a0 tp : 0000000000000000 t0 : 0000000000000000 [ 396.413514][ C0] t1 : ffe3ffff00011018 t2 : ff60000011ee59e0 s0 : ff20000000088100 [ 396.414588][ C0] s1 : ff20000000088090 a0 : ff6000006ec8b118 a1 : 0000000000000000 [ 396.415625][ C0] a2 : 0000000000000001 a3 : 0000000000000000 a4 : 0000000000000001 [ 396.416607][ C0] a5 : 0000000000000000 a6 : ffffffff808830c4 a7 : 0000000000000000 [ 396.417657][ C0] s2 : 0000000000000000 s3 : 0000000000000001 s4 : 0000000000000000 [ 396.418752][ C0] s5 : 0000000000000001 s6 : 0000000000000000 s7 : ffffffff808830c4 [ 396.419826][ C0] s8 : ffffffff89584780 s9 : ff60000072fecfc0 s10: ffffffff908a1980 [ 396.420909][ C0] s11: ff20000000088080 t3 : 0000000000000002 t4 : 0000000041b58ab3 [ 396.421944][ C0] t5 : ffe3ffff00011019 t6 : ff20000000088a80 [ 396.422882][ C0] status: 0000000200000120 badaddr: ff20000000087fe0 cause: 000000000000000f [ 396.424619][ C0] Kernel panic - not syncing: Kernel stack overflow [ 396.426292][ C0] CPU: 0 UID: 0 PID: 16 Comm: ksoftirqd/0 Not tainted 6.11.0-rc2-syzkaller-g7c1e5b9690b0 #0 [ 396.428835][ C0] Hardware name: riscv-virtio,qemu (DT) [ 396.430548][ C0] Call Trace: [ 396.431374][ C0] [] dump_backtrace+0x2e/0x3c [ 396.432961][ C0] [] show_stack+0x34/0x40 [ 396.433884][ C0] [] dump_stack_lvl+0x108/0x196 [ 396.435068][ C0] [] dump_stack+0x1c/0x24 [ 396.436056][ C0] [] panic+0x388/0x806 [ 396.436935][ C0] [] handle_bad_stack+0xe4/0x10c [ 396.438182][ C0] [] lock_acquire+0x74/0x98 [ 396.439957][ C0] SMP: stopping secondary CPUs [ 396.442605][ C0] Rebooting in 86400 seconds.. VM DIAGNOSIS: 12:13:19 Registers: info registers vcpu 0 CPU#0 V = 0 pc ffffffff81b0b9e8 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 ffffffff85edc814 sepc ffffffff80239424 vsepc 0000000000000000 mcause 8000000000000003 scause 000000000000000f vscause 0000000000000000 mtval 0000000000000000 stval ff20000000087fe0 htval 0000000000000000 mtval2 0000000000000000 mscratch 0000000080029000 sscratch 0000000000000000 satp a0127000000932a5 x0/zero 0000000000000000 x1/ra ffffffff81b0b9be x2/sp ff6000006ec70720 x3/gp ffffffff8954c0a0 x4/tp ff60000011ee4ec0 x5/t0 1fec0000023dcb3b x6/t1 ff60000011ee5b98 x7/t2 ff60000011ee59e0 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 0000000000000007 x18/s2 0000000000000030 x19/s3 0000000000000000 x20/s4 0000000000000000 x21/s5 0000000000000000 x22/s6 0000000000000000 x23/s7 ffffffff906d4c11 x24/s8 dfffffff00000000 x25/s9 fffffffef2111687 x26/s10 0000000000000010 x27/s11 0000000000000010 x28/t3 ffffffff86257484 x29/t4 0000000079f8feba x30/t5 ffffffff89655e40 x31/t6 1fec0000023dcb77 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 ffffffff804139f8 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 00007fff8443e67c vsepc 0000000000000000 mcause 0000000000000009 scause 000000000000000f vscause 0000000000000000 mtval 0000000000000000 stval 00005555950ee000 htval 0000000000000000 mtval2 0000000000000000 mscratch 0000000080027000 sscratch 0000000000000000 satp a0127000000932a5 x0/zero 0000000000000000 x1/ra ffffffff80413a0c x2/sp ff20000003dc30e0 x3/gp ffffffff8954c0a0 x4/tp ff6000001b934ec0 x5/t0 ff20000003dc32e0 x6/t1 ffe37fff0013cfee x7/t2 ff6000001b9359e0 x8/s0 ff20000003dc30d0 x9/s1 ff20000003dc3ee0 x10/a0 ff20000003dc3ee0 x11/a1 ff20000003dc3ee0 x12/a2 ff20000003dc4000 x13/a3 ffffffff8000fe5a x14/a4 0000000000000000 x15/a5 ff6000001b935ec0 x16/a6 0000000000000003 x17/a7 ff1c0000009e7f77 x18/s2 ff20000003dc3ee0 x19/s3 000000000000000d x20/s4 ff20000003dc3ef0 x21/s5 0000000000140cca x22/s6 0000000000000001 x23/s7 0000005c4d03b494 x24/s8 0000000000000030 x25/s9 ff60000072fecfc0 x26/s10 ff1c0000009e7f40 x27/s11 0000000000000001 x28/t3 0000000000000000 x29/t4 ffe37fff0013cfee x30/t5 ffe37fff0013cfef x31/t6 ff20000003dc3480 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