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| author |   Wang Nan <wangnan0@huawei.com> | 2015-09-01 03:29:44 +0000 |
|---|---|---|
| committer |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2015-09-01 11:33:48 -0300 |
| commit | 3b27d13940c3710a1128527c43719cb0bb05d73b (patch) | |
| tree | 88847c3a13e7c792c0416be0c6186d903fb57d2c /tools/perf/arch/sparc | |
| parent | Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent (diff) | |
| download | linux-dev-3b27d13940c3710a1128527c43719cb0bb05d73b.tar.xz linux-dev-3b27d13940c3710a1128527c43719cb0bb05d73b.zip | |
perf dwarf: Fix potential array out of bounds access
There is a problem in the dwarf-regs.c files for sh, sparc and x86 where
it is possible to make an out-of-bounds array access when searching for
register names.
This patch fixes it by replacing '<=' to '<', so when register (number
== XXX_MAX_REGS), get_arch_regstr() will return NULL.
Signed-off-by: Wang Nan <wangnan0@huawei.com>
Reviewed-by: Matt Fleming <matt@console-pimps.org>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Zefan Li <lizefan@huawei.com>
Cc: pi3orama@huawei.com
Link: http://lkml.kernel.org/r/1441078184-105038-1-git-send-email-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/arch/sparc')
| -rw-r--r-- | tools/perf/arch/sparc/util/dwarf-regs.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/perf/arch/sparc/util/dwarf-regs.c b/tools/perf/arch/sparc/util/dwarf-regs.c index 92eda412fed3..b704fdb9237a 100644 --- a/tools/perf/arch/sparc/util/dwarf-regs.c +++ b/tools/perf/arch/sparc/util/dwarf-regs.c @@ -39,5 +39,5 @@ const char *sparc_regs_table[SPARC_MAX_REGS] = { */ const char *get_arch_regstr(unsigned int n) { - return (n <= SPARC_MAX_REGS) ? sparc_regs_table[n] : NULL; + return (n < SPARC_MAX_REGS) ? sparc_regs_table[n] : NULL; } |