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| author | Chris Metcalf <cmetcalf@ezchip.com> | 2015-06-25 15:02:08 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-08-03 09:29:58 -0700 |
| commit | 567ee68e2c19462b5a1101ef551f2dcd5af0a2ff (patch) | |
| tree | 94a662ce39e83594f04ea46257673e3c6084031f /kernel | |
| parent | 7e7f9ef49764684da13bbfb61ca552b70613a461 (diff) | |
| download | lwn-567ee68e2c19462b5a1101ef551f2dcd5af0a2ff.tar.gz lwn-567ee68e2c19462b5a1101ef551f2dcd5af0a2ff.zip | |
__bitmap_parselist: fix bug in empty string handling
commit 2528a8b8f457d7432552d0e2b6f0f4046bb702f4 upstream.
bitmap_parselist("", &mask, nmaskbits) will erroneously set bit zero in
the mask. The same bug is visible in cpumask_parselist() since it is
layered on top of the bitmask code, e.g. if you boot with "isolcpus=",
you will actually end up with cpu zero isolated.
The bug was introduced in commit 4b060420a596 ("bitmap, irq: add
smp_affinity_list interface to /proc/irq") when bitmap_parselist() was
generalized to support userspace as well as kernelspace.
Fixes: 4b060420a596 ("bitmap, irq: add smp_affinity_list interface to /proc/irq")
Signed-off-by: Chris Metcalf <cmetcalf@ezchip.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel')
0 files changed, 0 insertions, 0 deletions