diff options
| author | cpw <cpw@sgi.com> | 2013-12-03 23:15:30 (GMT) |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2013-12-10 09:06:00 (GMT) |
| commit | 3eae49ca8954f958b2001ab5643ef302cb7b67c7 (patch) | |
| tree | 1af3483e0f6a1929bf79c59a3e9d8d19b23e9d69 /arch/x86/xen/xen-asm_64.S | |
| parent | 8b3b005d675726e38bc504d2e35a991e55819155 (diff) | |
| download | linux-3eae49ca8954f958b2001ab5643ef302cb7b67c7.tar.xz | |
x86/UV: Fix NULL pointer dereference in uv_flush_tlb_others() if the 'nobau' boot option is used
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>
Cc: <stable@vger.kernel.org> # 3.12.x
Link: http://lkml.kernel.org/r/E1VnzBi-0005yF-MU@eag09.americas.sgi.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/xen/xen-asm_64.S')
0 files changed, 0 insertions, 0 deletions