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| author | zhanghailiang <zhang.zhanghailiang@huawei.com> | 2014-11-17 13:57:34 +0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2014-11-17 13:59:23 +0100 |
| commit | fae38221e78fc9f847965f6d18b359b8044df348 (patch) | |
| tree | f34239a249594acc310c572682c63904d9fa9197 | |
| parent | 0e8b439ae57ee3c46fb95e1775ea038d34496346 (diff) | |
| download | qemu-fae38221e78fc9f847965f6d18b359b8044df348.zip | |
target-cris/translate.c: fix out of bounds read
In function t_gen_mov_TN_preg and t_gen_mov_preg_TN, The begin check about the
validity of in-parameter 'r' is useless. We still access cpu_PR[r] in the
follow code if it is invalid. Which will be an out-of-bounds read error.
Fix it by using assert() to ensure it is valid before using it.
Signed-off-by: zhanghailiang <zhang.zhanghailiang@huawei.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
| -rw-r--r-- | target-cris/translate.c | 8 |
1 files changed, 2 insertions, 6 deletions
diff --git a/target-cris/translate.c b/target-cris/translate.c index e37b04e69d..76406af980 100644 --- a/target-cris/translate.c +++ b/target-cris/translate.c @@ -169,9 +169,7 @@ static int preg_sizes[] = { static inline void t_gen_mov_TN_preg(TCGv tn, int r) { - if (r < 0 || r > 15) { - fprintf(stderr, "wrong register read $p%d\n", r); - } + assert(r >= 0 && r <= 15); if (r == PR_BZ || r == PR_WZ || r == PR_DZ) { tcg_gen_mov_tl(tn, tcg_const_tl(0)); } else if (r == PR_VR) { @@ -182,9 +180,7 @@ static inline void t_gen_mov_TN_preg(TCGv tn, int r) } static inline void t_gen_mov_preg_TN(DisasContext *dc, int r, TCGv tn) { - if (r < 0 || r > 15) { - fprintf(stderr, "wrong register write $p%d\n", r); - } + assert(r >= 0 && r <= 15); if (r == PR_BZ || r == PR_WZ || r == PR_DZ) { return; } else if (r == PR_SRS) { |