Messages in this thread | | | From | Anatoly Trosinenko <> | Date | Sun, 4 Nov 2018 10:37:34 +0300 | Subject | OCFS2: [ocfs2_rename:1688 ERROR: status = -39] with four syscalls on fresh FS image |
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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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