last executing test programs:

kernel console output (not intermixed with test programs):

Warning: Permanently added '[localhost]:51895' (ED25519) to the list of known hosts.
syzkaller login: [  419.816485][ T3175] cgroup: Unknown subsys name 'net'
[  420.646723][ T3175] cgroup: Unknown subsys name 'rlimit'
Setting up swapspace version 1, size = 127995904 bytes
[  483.031859][ T3175] Adding 124996k swap on ./swap-file.  Priority:0 extents:1 across:124996k 
[  491.600046][    C0] Insufficient stack space to handle exception!
[  491.601514][    C0] Task stack:     [0xff20000000088000..0xff2000000008c000]
[  491.602917][    C0] Overflow stack: [0xff6000006ec70070..0xff6000006ec71070]
[  491.604745][    C0] CPU: 0 UID: 0 PID: 16 Comm: ksoftirqd/0 Not tainted 6.11.0-rc2-syzkaller-g7c1e5b9690b0 #0
[  491.607512][    C0] Hardware name: riscv-virtio,qemu (DT)
[  491.614004][    C0] epc : mark_lock+0x2/0x1b10
[  491.617767][    C0]  ra : __lock_acquire+0xad0/0x82d8
[  491.619452][    C0] epc : ffffffff8022cb46 ra : ffffffff8022fb90 sp : ff20000000087e30
[  491.621583][    C0]  gp : ffffffff8954c0a0 tp : 0000000000000000 t0 : 1fec0000023dcb3b
[  491.624067][    C0]  t1 : ff60000011ee5af8 t2 : ff60000011ee59e0 s0 : ff20000000088190
[  491.626293][    C0]  s1 : ffffffff89649840 a0 : ff60000011ee4ec0 a1 : ff60000011ee5af8
[  491.627646][    C0]  a2 : 0000000000000008 a3 : 0000000000000000 a4 : ffffffff908a1980
[  491.630374][    C0]  a5 : 0000000000000007 a6 : ffffffff8cd1c5a0 a7 : 0000000000000004
[  491.633407][    C0]  s2 : 0000000000000007 s3 : 0000000000000007 s4 : dfffffff00000000
[  491.636222][    C0]  s5 : ffffffff8968bf60 s6 : ffffffff89584780 s7 : ff60000011ee59c4
[  491.638356][    C0]  s8 : 0000000000000002 s9 : 0000000000000000 s10: 0000000000001fff
[  491.639983][    C0]  s11: ff60000011ee4ec0 t3 : ffffffff86257484 t4 : 1fec0000023dcb38
[  491.641348][    C0]  t5 : 0000000000000001 t6 : 1fec0000023dcb63
[  491.642700][    C0] status: 0000000200000100 badaddr: ff20000000087fc0 cause: 000000000000000f
[  491.645643][    C0] Kernel panic - not syncing: Kernel stack overflow
[  491.650164][    C0] CPU: 0 UID: 0 PID: 16 Comm: ksoftirqd/0 Not tainted 6.11.0-rc2-syzkaller-g7c1e5b9690b0 #0
[  491.652978][    C0] Hardware name: riscv-virtio,qemu (DT)
[  491.654190][    C0] Call Trace:
[  491.655163][    C0] [<ffffffff80010216>] dump_backtrace+0x2e/0x3c
[  491.656674][    C0] [<ffffffff85edbd86>] show_stack+0x34/0x40
[  491.658281][    C0] [<ffffffff85f3735e>] dump_stack_lvl+0x108/0x196
[  491.659227][    C0] [<ffffffff85f37408>] dump_stack+0x1c/0x24
[  491.660194][    C0] [<ffffffff85edc94a>] panic+0x388/0x806
[  491.661026][    C0] [<ffffffff8000fcee>] handle_bad_stack+0xe4/0x10c
[  491.662031][    C0] [<ffffffff8022fb90>] __lock_acquire+0xad0/0x82d8
[  491.663263][    C0] SMP: stopping secondary CPUs
[  491.665592][    C0] Rebooting in 86400 seconds..

VM DIAGNOSIS:
15:58:38  Registers:
info registers vcpu 0

CPU#0
 V      =   0
 pc       ffffffff8444d3c0
 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     ffffffff80007110
 sepc     ffffffff8022cb46
 vsepc    0000000000000000
 mcause   8000000000000003
 scause   000000000000000f
 vscause  0000000000000000
 mtval    0000000000000000
 stval    ff20000000087fc0
 htval    0000000000000000
 mtval2   0000000000000000
 mscratch 0000000080029000
 sscratch 0000000000000000
 satp     a012b00000091733
 x0/zero  0000000000000000 x1/ra    ffffffff8444d3bc x2/sp    ff6000006ec70930 x3/gp    ffffffff8954c0a0
 x4/tp    ff60000011ee4ec0 x5/t0    ffffffff86425ae8 x6/t1    fffffffef12a9ea0 x7/t2    0000000000000000
 x8/s0    ff6000006ec70940 x9/s1    ffffffff87e06d70 x10/a0   000000012c4d8ae3 x11/a1   0000000000000003
 x12/a2   0000000000000000 x13/a3   ffffffff8444d3bc x14/a4   0000000000000000 x15/a5   ff60000011ee4ec0
 x16/a6   0000000000ff0100 x17/a7   fffffffff2000000 x18/s2   000000000000003f x19/s3   ffffffff87e06d70
 x20/s4   0000000000000004 x21/s5   0000000000000000 x22/s6   ffffffff87e06d40 x23/s7   0000000000000000
 x24/s8   ff6000006ec70a60 x25/s9   0000000000000000 x26/s10  1fec00000dd8e144 x27/s11  ffffffff908a1980
 x28/t3   1fec00000dd8e18c x29/t4   fffffffef12a9ea0 x30/t5   fffffffef12a9ea1 x31/t6   ffffffff896870ec
 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       ffffffff8024021a
 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     a01270000009761c
 x0/zero  0000000000000000 x1/ra    ffffffff8024019c x2/sp    ff2000000421b900 x3/gp    ffffffff8954c0a0
 x4/tp    ff6000001431b480 x5/t0    1fec0000028637f3 x6/t1    ffebffff02ea04d0 x7/t2    ff6000001431bfa0
 x8/s0    ff2000000421b960 x9/s1    ff60000017502680 x10/a0   0000000000000001 x11/a1   0000000000000004
 x12/a2   0000000000000001 x13/a3   ffffffff8024019c x14/a4   0000000000000000 x15/a5   0000000002830281
 x16/a6   ffebffff02ea04d1 x17/a7   ff60000017502683 x18/s2   ffebffff02ea04d0 x19/s3   ff60000017502690
 x20/s4   0000000000000000 x21/s5   ff60000017502688 x22/s6   1fec000002ea04d2 x23/s7   0000000000000003
 x24/s8   1fec000002ea04d1 x25/s9   0000000000000282 x26/s10  1fec000002ea04d0 x27/s11  0000000000000000
 x28/t3   ffffffff86257484 x29/t4   ffebffff02ea04d0 x30/t5   ffebffff02ea04d1 x31/t6   1fec0000028637fd
 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