last executing test programs: kernel console output (not intermixed with test programs): Warning: Permanently added '[localhost]:56174' (ED25519) to the list of known hosts. syzkaller login: [ 373.470902][ T3193] cgroup: Unknown subsys name 'net' [ 374.201418][ T3193] cgroup: Unknown subsys name 'rlimit' Setting up swapspace version 1, size = 127995904 bytes [ 431.178671][ T3193] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 441.555898][ C0] Insufficient stack space to handle exception! [ 441.558059][ C0] Task stack: [0xff20000000050000..0xff20000000054000] [ 441.559581][ C0] Overflow stack: [0xff6000006ec70070..0xff6000006ec71070] [ 441.561814][ C0] CPU: 0 UID: 0 PID: 9 Comm: kworker/0:1 Not tainted 6.11.0-rc2-syzkaller-g7c1e5b9690b0 #0 [ 441.564137][ C0] Hardware name: riscv-virtio,qemu (DT) [ 441.566357][ C0] Workqueue: events_power_efficient gc_worker [ 441.570123][ C0] epc : mark_lock+0x2e/0x1b10 [ 441.571901][ C0] ra : __lock_acquire+0x1be0/0x82d8 [ 441.573417][ C0] epc : ffffffff8022cb72 ra : ffffffff80230ca0 sp : ff1fffffffffff90 [ 441.576570][ C0] gp : ffffffff8954c0a0 tp : 0000000000000000 t0 : 1fec0000023d4163 [ 441.580129][ C0] t1 : ff60000011ea0d00 t2 : ff60000011ea0b20 s0 : ff20000000000130 [ 441.581856][ C0] s1 : ffffffff89649840 a0 : ff60000011ea0000 a1 : ff60000011ea0d00 [ 441.583274][ C0] a2 : 0000000000000000 a3 : 0000000041b58ab3 a4 : 0000000000000000 [ 441.584695][ C0] a5 : ff200000000000c0 a6 : ffffffff8cd1c5a0 a7 : 0000000000000004 [ 441.586360][ C0] s2 : 000000000000000c s3 : ff6000006ec71484 s4 : ff200000000000c0 [ 441.587673][ C0] s5 : ffffffff8968bf60 s6 : ffffffff89584780 s7 : ff60000011ea0b04 [ 441.589006][ C0] s8 : 0000000000000002 s9 : 0000000000000001 s10: 000000000000000c [ 441.590216][ C0] s11: ff60000011ea0000 t3 : ffffffff86257484 t4 : 1fec0000023d4160 [ 441.591485][ C0] t5 : 0000000000000002 t6 : 1fec0000023d41a4 [ 441.592541][ C0] status: 0000000200000100 badaddr: ff1fffffffffffe0 cause: 000000000000000f [ 441.594917][ C0] Kernel panic - not syncing: Kernel stack overflow [ 441.597036][ C0] CPU: 0 UID: 0 PID: 9 Comm: kworker/0:1 Not tainted 6.11.0-rc2-syzkaller-g7c1e5b9690b0 #0 [ 441.599052][ C0] Hardware name: riscv-virtio,qemu (DT) [ 441.600229][ C0] Workqueue: events_power_efficient gc_worker [ 441.601966][ C0] Call Trace: [ 441.602942][ C0] [] dump_backtrace+0x2e/0x3c [ 441.604480][ C0] [] show_stack+0x34/0x40 [ 441.605753][ C0] [] dump_stack_lvl+0x108/0x196 [ 441.607320][ C0] [] dump_stack+0x1c/0x24 [ 441.608866][ C0] [] panic+0x388/0x806 [ 441.610247][ C0] [] handle_bad_stack+0xe4/0x10c [ 441.611745][ C0] [] __lock_acquire+0x1be0/0x82d8 [ 441.613789][ C0] SMP: stopping secondary CPUs [ 441.617008][ C0] Rebooting in 86400 seconds.. VM DIAGNOSIS: 00:45:48 Registers: info registers vcpu 0 CPU#0 V = 0 pc ffffffff85ebc34a 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 ffffffff8000fdf6 sepc ffffffff8022cb72 vsepc 0000000000000000 mcause 8000000000000003 scause 000000000000000f vscause 0000000000000000 mtval 0000000000000000 stval ff1fffffffffffe0 htval 0000000000000000 mtval2 0000000000000000 mscratch 0000000080029000 sscratch 0000000000000000 satp a014100000094359 x0/zero 0000000000000000 x1/ra ffffffff80239c8a x2/sp ff6000006ec70900 x3/gp ffffffff8954c0a0 x4/tp ff60000011ea0000 x5/t0 4900000000000000 x6/t1 0000000000000001 x7/t2 49552030203a5550 x8/s0 ff6000006ec70900 x9/s1 ffffffffffffffff x10/a0 ffffffff87cd2620 x11/a1 000000000000001f x12/a2 0000000000000000 x13/a3 ffffffff80257f04 x14/a4 0000000000000000 x15/a5 0000000000000000 x16/a6 0000000000ff0100 x17/a7 ff6000006ec705a7 x18/s2 ffffffff87cd2620 x19/s3 fffffffef0f9a4c8 x20/s4 00000000ffffdfff x21/s5 0000000000000000 x22/s6 ff6000006ec703e0 x23/s7 ffffffff87d827c8 x24/s8 1ffffffff0fb6505 x25/s9 0000000000000003 x26/s10 ffffffff87cd2620 x27/s11 1fec00000dd8e0d4 x28/t3 ff60000011ea0008 x29/t4 ffebffff0dd8e080 x30/t5 fffffffef12a9ea1 x31/t6 ff6000006ec70418 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 a01490000009b47b x0/zero 0000000000000000 x1/ra ffffffff8024019c x2/sp ff2000000000bb90 x3/gp ffffffff8954c0a0 x4/tp ff6000001a60b480 x5/t0 1fec0000034c17f3 x6/t1 ffebffff03082658 x7/t2 ff6000001a60bfa0 x8/s0 ff2000000000bbf0 x9/s1 ff600000184132c0 x10/a0 0000000000000001 x11/a1 0000000000000004 x12/a2 0000000000000001 x13/a3 ffffffff8024019c x14/a4 0000000000000000 x15/a5 0000000005720570 x16/a6 ffebffff03082659 x17/a7 ff600000184132c3 x18/s2 ffebffff03082658 x19/s3 ff600000184132d0 x20/s4 0000000000000000 x21/s5 ff600000184132c8 x22/s6 1fec00000308265a x23/s7 0000000000000003 x24/s8 1fec000003082659 x25/s9 0000000000000571 x26/s10 1fec000003082658 x27/s11 ff6000006ec967d0 x28/t3 ffffffff86257484 x29/t4 ffebffff03082658 x30/t5 ffebffff03082659 x31/t6 1fec0000034c180c 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