[lustre-devel] [PATCH V2] libcfs: Fix a sleep-in-atomic bug in cfs_wi_exit

Greg KH gregkh at linuxfoundation.org
Sat Jun 3 01:50:35 PDT 2017

On Wed, May 31, 2017 at 04:00:41PM +0800, Jia-Ju Bai wrote:
> The driver may sleep under a spin lock, and the function call path is:
> cfs_wi_exit (acquire the lock by spin_lock)
>     lbug_with_loc
>       libcfs_debug_dumplog
>         schedule and kthread_run --> may sleep
> To fix it, all "LASSERT" is placed out of the spin_lock and spin_unlock.
> Signed-off-by: Jia-Ju Bai <baijiaju1990 at 163.com>
> ---
>  drivers/staging/lustre/lnet/libcfs/workitem.c |   13 +++++++------
>  1 file changed, 7 insertions(+), 6 deletions(-)

What changed from v1?  You have to always tell us that.

Please redo all of these, if they are still valid patches, and send them
as a patch series, so I know what order they should be applied in.


greg k-h

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