newfs segfault (was:nvme dma returns EFBIG (27))

[Jesper Schmitz Mouridsen]

On 10.02.2021 23.08, Emmanuel Vadot wrote:
> On Wed, 10 Feb 2021 22:55:27 +0100
> Jesper Schmitz Mouridsen <jsm at FreeBSD.org> wrote:
>
>> Hi
>>
>> I can dd blocks from /dev/nda0p0 but I cannot run newfs.
>>
>> It prints nvme0: nvme_payload_map: err  27.  and ctrl+t shows it is
>> stuck in physwri
>>
>> https://github.com/freebsd/freebsd-src/blob/a6dc68c0e0f8a24ffaf0b4e78e58141ef7897047/sys/dev/nvme/nvme_qpair.c#L1003
>>
>> https://github.com/freebsd/freebsd-src/blob/c6c70c074633569447be4bfd2b694a1c294015bd/sys/dev/nvme/nvme_qpair.c#L567
>>
>> I could format as ext4 under Linux.
>>
>> Any hints or pointers are welcome.
>>
>> Thanks
>>
>> Jesper
>   What board ?
>   What version of FreeBSD ?
>   dmesg ?
>
>   Any of the above is *always* required for trying to reproduce and
> finding bugs.
>
>   Cheers,
>
I was on FreeBSD generic 13.0-ALPHA1 on

on FreeBSD generic 13.0-ALPHA2 FreeBSD 13.0-ALPHA2 #0 c256201-g02611ef8ee9

newfs /dev/nda0p1v now core dumps.

Program terminated with signal SIGSEGV, Segmentation fault.
#0  isblock (cp=0x100247f9f <error: Cannot access memory at address 
0x100247f9f>, h=0, fs=<optimized out>) at /usr/src/sbin/newfs/mkfs.c:1085
1085    /usr/src/sbin/newfs/mkfs.c: No such file or directory.
(gdb) bt
#0  isblock (cp=0x100247f9f <error: Cannot access memory at address 
0x100247f9f>, h=0, fs=<optimized out>) at /usr/src/sbin/newfs/mkfs.c:1085
#1  alloc (size=4096, mode=mode at entry=16893) at 
/usr/src/sbin/newfs/mkfs.c:1001
#2  0x0000000000215d20 in fsinit (utime=<optimized out>) at 
/usr/src/sbin/newfs/mkfs.c:948
#3  mkfs (pp=<optimized out>, pp at entry=0x0, fsys=<optimized out>, 
fsys at entry=0xffffffffee26 "/dev/nda0p1") at /usr/src/sbin/newfs/mkfs.c:611
#4  0x00000000002133ec in main (argc=<optimized out>, argv=<optimized 
out>) at /usr/src/sbin/newfs/newfs.c:405

It is on my pinebookpro. nvmecontrol devlist
  nvme0: KINGSTON SA2000M8250G
     nvme0ns1 (238475MB)