gdb log of crashed "btrfs-image -s"

[Christoph Groth]

Christoph Groth wrote:

Chris Murphy wrote:

On Tue, Jan 17, 2017 at 1:25 PM, Christoph Groth
<christ...@grothesque.org> wrote:

Any ideas on what could be done? If you need help to debug the problem with btrfs-image, please tell me what I should do. I can keep the broken file system around until an image can be created at some later time.

get a segfault.

Try 4.9, or even 4.8.5, tons of bugs have been fixed since 4.7.3 although I don't know off hand if this particular bug is fixed. I did recently do a btrfs-image with btrfs-progs v4.9 with -s and did not

/mnt/btrfs-image.static -c3 -s /dev/sda2 /mnt/mim-s.bim




====== Backtrace: ======
[0x45fb97]
[0x465442]
[0x465c1e]
[0x402694]
[0x402dcb]
[0x4031fe]
[0x4050ff]
[0x405783]
[0x44cb73]
[0x44cdfe]
[0x400b2a]

I compiled btrfs-image.static from btrfs-tools 4.9 (from git) and started it from Debian testing's initramfs. The exact command that I use is: It runs for a couple of seconds (enough to write 20263936 bytes of output) and then quits with *** Error in `/mnt/btrfs-image.static`: double free or corruption (!prev): 0x00000000009f0940 *** (I had to type the above off the other screen, but I double checked that there are no errors.) The executable that I used can be downloaded from http://groth.fr/btrfs-image.static

Its md5sum is 48abbc82ac6d3c0cb88cba1e5edb85fd.

I hope that this can help someone to see what's going on.

I ran the same executable under gdb from a live system. The log is attached.

btrfs-image.log
Description: Binary data

signature.asc
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