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| author | cpw <cpw@sgi.com> | 2013-12-03 23:15:30 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-12-20 15:49:01 (GMT) |
| commit | 6a4204b8c03b92947d338c804132ac782a24cc7d (patch) | |
| tree | 7a99fe7f869f08944eb949f908914908116e1f75 /arch/x86/realmode/rm/Makefile | |
| parent | 9952005841964ea98f24bd402e22b13fd8398368 (diff) | |
| download | linux-fsl-qoriq-6a4204b8c03b92947d338c804132ac782a24cc7d.tar.xz | |
x86/UV: Fix NULL pointer dereference in uv_flush_tlb_others() if the 'nobau' boot option is used
commit 3eae49ca8954f958b2001ab5643ef302cb7b67c7 upstream.
The SGI UV tlb shootdown code panics the system with a NULL
pointer deference if 'nobau' is specified on the boot
commandline.
uv_flush_tlb_other() gets called for every flush, whether the
BAU is disabled or not. It should not be keeping the s_enters
statistic while the BAU is disabled.
The panic occurs because during initialization
init_per_cpu_tunables() does not set the bcp->statp pointer if
'nobau' was specified.
Signed-off-by: Cliff Wickman <cpw@sgi.com>
Link: http://lkml.kernel.org/r/E1VnzBi-0005yF-MU@eag09.americas.sgi.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/x86/realmode/rm/Makefile')
0 files changed, 0 insertions, 0 deletions