** Changed in: linux (Ubuntu Trusty)
Status: New => Fix Committed
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https://bugs.launchpad.net/bugs/1658633
Title:
stress_smoke_test passing and exiting rc=9 (linux 4.9.0-12.13 ADT test
failure with linux 4.9.0-12.13)
Status in Linux:
Unknown
Status in linux package in Ubuntu:
In Progress
Status in linux source package in Trusty:
Fix Committed
Status in linux source package in Xenial:
Fix Committed
Status in linux source package in Yakkety:
New
Bug description:
== SRU Request [ Trusty, Xenial, Yakkey ] + Zesty ==
When running the stress-ng --xattr stressor with several instances of
the stressor on ext4 we can trip an xattr bug in the ext4 file system.
== Fix ==
Upstream commit:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=dac7a4b4b1f664934e8b713f529b629f67db313c
ext4: lock the xattr block before checksuming it
We must lock the xattr block before calculating or verifying the
checksum in order to avoid spurious checksum failures.
https://bugzilla.kernel.org/show_bug.cgi?id=193661
Reported-by: Colin Ian King <colin.k...@canonical.com>
Signed-off-by: Theodore Ts'o <ty...@mit.edu>
Cc: sta...@vger.kernel.org
== Test case ==
Fire up an x86 VM with 8 or more CPUs in the instance, run:
stress-ng --xattr 0 -t 60 -v
Without the fix, the file system will report broken xattrs and the
file system will go read-only.
With the fix, it runs without fault.
== Regression Potential ==
This changes the checksumming in the ext4 xattr so it only touches the
ext4 xattr part of the file system. Risk is therefore contained in
the xattr handling on ext4. Tested with stress-ng and the generic
file system tests without any regressions, so risk is limited and
small.
---------------------------------------------------------
Testing failed on:
ppc64el:
https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-zesty/zesty/ppc64el/l/linux/20170122_110123_770b2@/log.gz
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