[lustre-devel] [PATCH v2 1/2] staging: lustre: remove broken dead code in cfs_cpt_table_create_pattern

Greg Kroah-Hartman gregkh at linuxfoundation.org
Thu Oct 27 06:12:42 PDT 2016

On Tue, Oct 25, 2016 at 11:22:30PM +0200, Arnd Bergmann wrote:
> After a recent bugfix, we get a warning about the use of an uninitialized
> variable:
> drivers/staging/lustre/lnet/libcfs/linux/linux-cpu.c: In function 'cfs_cpt_table_create_pattern':
> drivers/staging/lustre/lnet/libcfs/linux/linux-cpu.c:833:7: error: 'str' may be used uninitialized in this function [-Werror=maybe-uninitialized]
> This part of the function used to not do anything as we would reassign
> the 'str' pointer to something else right away, but now we pass an
> uninitialized pointer into 'strchr', which can cause a kernel page fault
> or worse.
> Fixes: 239fd5d41f9b ("staging: lustre: libcfs: shortcut to create CPT from NUMA topology")
> Signed-off-by: Arnd Bergmann <arnd at arndb.de>
> ---
>  drivers/staging/lustre/lnet/libcfs/linux/linux-cpu.c | 7 -------
>  1 file changed, 7 deletions(-)

Hm, I already applied the v1 versions of these, right?  What changed
with these, they seem identical to me...


greg k-h

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