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SubjectOCFS2: [ocfs2_rename:1688 ERROR: status = -39] with four syscalls on fresh FS image
Hello,

When fuzzing OCFS2, I got an ERROR message in dmesg output with
several syscalls on completely fresh, uncrafted FS image. From this
https://oss.oracle.com/pipermail/ocfs2-devel/2012-August/008683.html
it looks like ERROR messages are indicating some unexpected conditions
in the driver code, is it right? If so, here it how to reproduce it
with kvm-xfstests:

1) Checkout latest torvalds/master (tested with commit 71e56028), copy
x86_64-config-4.14 from fstests to .config, `make olddefconfig`,
enable CONFIG_FS then OCFS2 and compile
2) Create fresh OCFS2 image:
$ fallocate -l 256M ocfs2
$ mkfs.ocfs2 -L test --fs-features=local ./ocfs2
$ mv ocfs2 /tmp/kvm-xfstests-$USER/ # mkfs.ocfs2 seems to not operate
on tmpfs that can be mounted on /tmp
3) gcc --static ocfs2.c -o /tmp/kvm-xfstests-$USER/repro
4) Inside the ./kvm-xfstests shell
root@kvm-xfstests:~# mount /vtmp
root@kvm-xfstests:~# mount /vtmp/ocfs2 /mnt
[ 17.168634] JBD2: Ignoring recovery information on journal
[ 17.173903] ocfs2: Mounting device (7,0) on (node local, slot 0)
with ordered data mode.
root@kvm-xfstests:~# /vtmp/repro
[ 20.597145] (repro,368,1):ocfs2_rename:1688 ERROR: status = -39
root@kvm-xfstests:~#

Best regards
Anatoly
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include <stdio.h>

int main()
{
mkdir("/mnt/xyz", 0x700);
mkdir("/mnt/abc", 0x700);
symlink("/mnt", "/mnt/xyz/1");
rename("/mnt/abc", "/mnt/xyz");
}
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