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* [bug] segfault btrfs fi usage on seed sprout
@ 2019-08-13 16:42 Chris Murphy
  0 siblings, 0 replies; only message in thread
From: Chris Murphy @ 2019-08-13 16:42 UTC (permalink / raw)
  To: Btrfs BTRFS

segfault 'btrfs fi usage' on two device btrfs seed+sprout volume
https://bugzilla.kernel.org/show_bug.cgi?id=204569

kernel 5.2.8
btrfs-progs 5.2.1

'btrfs fi show' does work:
Label: 'first'  uuid: f7638175-SNIP
        Total devices 2 FS bytes used 841.10GiB
        devid    2 size 1024.00GiB used 882.00GiB path /dev/mapper/first
        devid    3 size 698.62GiB used 2.06GiB path /dev/mapper/sdc

devid2 is the seed
devid3 is the sprout

Mount options
/dev/mapper/first on /mnt/first type btrfs
(rw,noatime,seclabel,space_cache=v2,subvolid=5,subvol=/)

'btrfs fi usage /mnt/first' crashes with segmentation fault and no
other messages

dmesg shows
[126052.599013] btrfs[14847]: segfault at 7ffe5e1e1018 ip
000000000046db14 sp 00007ffe5e1df1a0 error 4 in btrfs[40c000+7c000]
[126052.599034] Code: 28 48 c7 40 08 00 00 00 00 48 8b 74 24 08 48 89
70 18 48 8b 74 24 10 48 01 70 08 48 83 c3 20 48 3b 5c 24 18 0f 84 12
ff ff ff <48> 8b 2b 41 8b 0e 85 c9 7e 95 49 8b 17 8d 41 ff 48 c1 e0 05
48 8d



-- 
Chris

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2019-08-13 16:42 [bug] segfault btrfs fi usage on seed sprout Chris Murphy

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