last executing test programs: kernel console output (not intermixed with test programs): Warning: Permanently added '[localhost]:56999' (ED25519) to the list of known hosts. syzkaller login: [ 415.760301][ T3177] cgroup: Unknown subsys name 'net' [ 416.638851][ T3177] cgroup: Unknown subsys name 'rlimit' Setting up swapspace version 1, size = 127995904 bytes [ 483.351156][ T3177] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 491.604173][ C0] Insufficient stack space to handle exception! [ 491.609096][ C0] Task stack: [0xffffffff87c00000..0xffffffff87c04000] [ 491.610257][ C0] Overflow stack: [0xff6000006ec70070..0xff6000006ec71070] [ 491.612432][ C0] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.11.0-rc2-syzkaller-g7c1e5b9690b0 #0 [ 491.617191][ C0] Hardware name: riscv-virtio,qemu (DT) [ 491.619361][ C0] epc : __this_cpu_preempt_check+0x2/0x1e [ 491.623929][ C0] ra : lock_acquire.part.0+0x228/0x820 [ 491.627398][ C0] epc : ffffffff85f3bd84 ra : ffffffff8023961e sp : ff1fffffffffffa0 [ 491.629741][ C0] gp : ffffffff8954c0a0 tp : 0000000000000000 t0 : 0000000000000000 [ 491.634118][ C0] t1 : 0000000000000001 t2 : ffffffff87c41b60 s0 : ff20000000000110 [ 491.638025][ C0] s1 : 0000000000000000 a0 : ffffffff8643eb20 a1 : ffffffff908a1980 [ 491.641524][ C0] a2 : 0000000000000305 a3 : 0000000000000000 a4 : ffffffff87c42040 [ 491.644661][ C0] a5 : 0000000000000000 a6 : ffffffff808830c4 a7 : 0000000000000001 [ 491.646326][ C0] s2 : 0000000000000001 s3 : 0000000000000001 s4 : ff6000006ec8b118 [ 491.647963][ C0] s5 : 1fe4000000000000 s6 : 0000000000000000 s7 : ffffffff808830c4 [ 491.649737][ C0] s8 : 0000000000000000 s9 : ffffffff86257708 s10: ffffffff908a1980 [ 491.653826][ C0] s11: 0000000200000022 t3 : ffffffff87c41048 t4 : 0000000000000000 [ 491.655719][ C0] t5 : 1ffffffff0f88209 t6 : ff20000000000aa0 [ 491.657372][ C0] status: 0000000200000100 badaddr: ff1fffffffffffa0 cause: 000000000000000f [ 491.659856][ C0] Kernel panic - not syncing: Kernel stack overflow [ 491.662096][ C0] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.11.0-rc2-syzkaller-g7c1e5b9690b0 #0 [ 491.665535][ C0] Hardware name: riscv-virtio,qemu (DT) [ 491.668041][ C0] Call Trace: [ 491.669373][ C0] [<ffffffff80010216>] dump_backtrace+0x2e/0x3c [ 491.671396][ C0] [<ffffffff85edbd86>] show_stack+0x34/0x40 [ 491.673059][ C0] [<ffffffff85f3735e>] dump_stack_lvl+0x108/0x196 [ 491.674855][ C0] [<ffffffff85f37408>] dump_stack+0x1c/0x24 [ 491.676750][ C0] [<ffffffff85edc94a>] panic+0x388/0x806 [ 491.678338][ C0] [<ffffffff8000fcee>] handle_bad_stack+0xe4/0x10c [ 491.680313][ C0] [<ffffffff8023961e>] lock_acquire.part.0+0x228/0x820 [ 491.682921][ C0] SMP: stopping secondary CPUs [ 491.686808][ C0] Rebooting in 86400 seconds.. VM DIAGNOSIS: 12:39:02 Registers: info registers vcpu 0 CPU#0 V = 0 pc ffffffff81b0b9e8 mhartid 0000000000000000 mstatus 0000000a00000180 hstatus 0000000200000000 vsstatus 0000000a00000000 mip 0000000000000002 mie 000000000000022a mideleg 0000000000001666 hideleg 0000000000000000 medeleg 0000000000f0b509 hedeleg 0000000000000000 mtvec 0000000080000428 stvec ffffffff85f5b9a0 vstvec 0000000000000000 mepc ffffffff8001f472 sepc ffffffff85f3bd84 vsepc 0000000000000000 mcause 8000000000000003 scause 000000000000000f vscause 0000000000000000 mtval 0000000000000000 stval ff1fffffffffffa0 htval 0000000000000000 mtval2 0000000000000000 mscratch 0000000080029000 sscratch 0000000000000000 satp a0127000000981c8 x0/zero 0000000000000000 x1/ra ffffffff81b0b9be x2/sp ff6000006ec70720 x3/gp ffffffff8954c0a0 x4/tp ffffffff87c41040 x5/t0 1ffffffff0f8836b x6/t1 ffffffff87c41d18 x7/t2 ffffffff87c41b60 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 0000000000000074 x19/s3 0000000000000000 x20/s4 0000000000000000 x21/s5 0000000000000000 x22/s6 0000000000000000 x23/s7 ffffffff906d4c0e x24/s8 dfffffff00000000 x25/s9 fffffffef2111687 x26/s10 0000000000000010 x27/s11 0000000000000010 x28/t3 ffffffff86257484 x29/t4 0000000018982770 x30/t5 ffffffff89655e40 x31/t6 1ffffffff0f883a7 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 a0127000000981c8 x0/zero 0000000000000000 x1/ra ffffffff8024019c x2/sp ff200000000d3a00 x3/gp ffffffff8954c0a0 x4/tp ff60000012290000 x5/t0 1fec000002452163 x6/t1 ffebffff03aba348 x7/t2 ff60000012290b20 x8/s0 ff200000000d3a60 x9/s1 ff6000001d5d1a40 x10/a0 0000000000000001 x11/a1 0000000000000004 x12/a2 0000000000000001 x13/a3 ffffffff8024019c x14/a4 0000000000000000 x15/a5 0000000001930191 x16/a6 ffebffff03aba349 x17/a7 ff6000001d5d1a43 x18/s2 ffebffff03aba348 x19/s3 ff6000001d5d1a50 x20/s4 0000000000000000 x21/s5 ff6000001d5d1a48 x22/s6 1fec000003aba34a x23/s7 0000000000000003 x24/s8 1fec000003aba349 x25/s9 0000000000000192 x26/s10 1fec000003aba348 x27/s11 ff6000006ec967d0 x28/t3 ffffffff86257484 x29/t4 ffebffff03aba348 x30/t5 ffebffff03aba349 x31/t6 1fec000002452168 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