| From | Sasha Levin <> | Subject | [PATCH AUTOSEL 4.18 098/100] mm/vmstat.c: fix outdated vmstat_text | Date | Tue, 16 Oct 2018 00:12:19 -0400 |
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From: Jann Horn <jannh@google.com>
[ Upstream commit 28e2c4bb99aa40f9d5f07ac130cbc4da0ea93079 ]
7a9cdebdcc17 ("mm: get rid of vmacache_flush_all() entirely") removed the VMACACHE_FULL_FLUSHES statistics, but didn't remove the corresponding entry in vmstat_text. This causes an out-of-bounds access in vmstat_show().
Luckily this only affects kernels with CONFIG_DEBUG_VM_VMACACHE=y, which is probably very rare.
Link: http://lkml.kernel.org/r/20181001143138.95119-1-jannh@google.com Fixes: 7a9cdebdcc17 ("mm: get rid of vmacache_flush_all() entirely") Signed-off-by: Jann Horn <jannh@google.com> Reviewed-by: Kees Cook <keescook@chromium.org> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Michal Hocko <mhocko@suse.com> Acked-by: Roman Gushchin <guro@fb.com> Cc: Davidlohr Bueso <dave@stgolabs.net> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Christoph Lameter <clameter@sgi.com> Cc: Kemi Wang <kemi.wang@intel.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Ingo Molnar <mingo@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org> --- mm/vmstat.c | 1 - 1 file changed, 1 deletion(-)
diff --git a/mm/vmstat.c b/mm/vmstat.c index 55a5bb1d773d..7878da76abf2 100644 --- a/mm/vmstat.c +++ b/mm/vmstat.c @@ -1286,7 +1286,6 @@ const char * const vmstat_text[] = { #ifdef CONFIG_DEBUG_VM_VMACACHE "vmacache_find_calls", "vmacache_find_hits", - "vmacache_full_flushes", #endif #ifdef CONFIG_SWAP "swap_ra", -- 2.17.1
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