Re: panic: vm_fault failed: %lx error 1 (from arm64::data_abort)

On Thu, 5 Jan 2023, Bjoern A. Zeeb wrote:

Hi,

> on an unattended console after updating the machine (previious builds were 
> Dec 23) did not come back up.
> I have a few last lines.
>
> esr:   96000004
> panic: vm_fault failed: <addr> error 1
> cpuid = 0
> time = 1
> KDB: stack backtrace:
> ..
> data_abort()
> ..
> --- exception, esr 0x96000004
> thread_init()
> keg_alloc_slap()
> zone_import()
> cache_alloc()
> cace_alloc_retry()
> thread_alloc()
> fork()
> kproc_create()
> audit_worker_init()
> mi_startup()
> virtdone()

Follow-up, got a serial console hooked up and a kernel as of an hour ago
or so:

...
hostuuid: using 00000000-0000-0000-0000-000000000000
ULE: setup cpu 0
ULE: setup cpu 1
ULE: setup cpu 2
ULE: setup cpu 3
Fatal data abort:
   x0: ffffa000008c1d80
   x1:                0
   x2:                2
   x3:                3
   x4:              203
   x5:                0
   x6: ffffffffffffffff
   x7:             2001
   x8: ffff000000ee5000 (dump_encrypted_write.buf + f54)
   x9:                0
  x10: ffffa00000845be0
  x11:                2
  x12: ffff00004041dd98 (fuse_mtx + 3c276888)
  x13:   20000000000040
  x14:           42c000
  x15:                1
  x16:                c
  x17:            4082a
  x18: ffff000000fcf6a0 (initstack + 36a0)
  x19: ffff00004082b000 (fuse_mtx + 3c683af0)
  x20:                0
  x21: ffff00004082b000 (fuse_mtx + 3c683af0)
  x22:                2
  x23:                0
  x24: ffff00004082d000 (fuse_mtx + 3c685af0)
  x25:                0
  x26: ffff000000c73000 (sdta_vfs_vop_vop_spare4_return1 + 18)
  x27:                2
  x28:                1
  x29: ffff000000fcf6a0 (initstack + 36a0)
   sp: ffff000000fcf6a0
   lr: ffff0000004cdff8 (thread_init + 98)
  elr: ffff0000004ce004 (thread_init + a4)
spsr:         600000c5
  far:               40
  esr:         96000004
panic: vm_fault failed: ffff0000004ce004 error 1
cpuid = 0
time = 1
KDB: stack backtrace:
db_trace_self() at db_trace_self
db_trace_self_wrapper() at db_trace_self_wrapper+0x30
vpanic() at vpanic+0x13c
panic() at panic+0x44
data_abort() at data_abort+0x308
handle_el1h_sync() at handle_el1h_sync+0x10
--- exception, esr 0x96000004
thread_init() at thread_init+0xa4
keg_alloc_slab() at keg_alloc_slab+0x24c
zone_import() at zone_import+0xe0
cache_alloc() at cache_alloc+0x32c
cache_alloc_retry() at cache_alloc_retry+0x2c
thread_alloc() at thread_alloc+0x38
fork1() at fork1+0x348
kproc_create() at kproc_create+0x78
audit_worker_init() at audit_worker_init+0x44
mi_startup() at mi_startup+0x200
virtdone() at virtdone+0x6c
KDB: enter: panic
[ thread pid 0 tid 100000 ]
Stopped at      kdb_enter+0x44: undefined       f900027f
db> show reg
spsr        0xf2000000600000c5
x0                        0x12
x1                         0xa
x2                           0
x3                         0xa
x4          0xffff0000007f5c10  generic_bs_w_4
x5                        0x50
x6          0xffff00000051244c  kvprintf+0x470
x7                        0xd5
x8                         0x1
x9          0x49a2d892bc05a0b1
x10         0xffff000000ebd000  null_gdb_dbgport+0x20
x11         0xfefefefefefefeff
x12         0xffff000000000a63  create_pagetables+0x3b
x13             0xfefefeff0100
x14                          0
x15                          0
x16                          0
x17                          0
x18         0xffff000000fcf310  initstack+0x3310
x19         0xffff000000f16000  kdb_why
x20         0xffff000000ee3f70  vpanic.buf
x21         0xffff000000ec0cc0  thread0_st
x22                          0
x23         0xffff000000ee4000  vpanic.buf+0x90
x24                        0x1
x25         0xffff000000fcfaa0  initstack+0x3aa0
x26         0xffff000000c73000  sdta_vfs_vop_vop_spare4_return1+0x18
x27                        0x2
x28                        0x1
x29         0xffff000000fcf310  initstack+0x3310
lr          0xffff00000050b0c4  kdb_enter+0x40
elr         0xffff00000050b0c8  kdb_enter+0x44
sp          0xffff000000fcf310  initstack+0x3310
kdb_enter+0x44: undefined       f900027f


-- 
Bjoern A. Zeeb                                                     r15:7