diff options
| author | Jim Meyering <meyering@redhat.com> | 2012-08-22 13:55:55 +0200 |
|---|---|---|
| committer | Anthony Liguori <aliguori@us.ibm.com> | 2012-08-22 10:47:14 -0500 |
| commit | 396bef4b3846bf4e80a2bee38e9a2d8554d0f251 (patch) | |
| tree | a820a8460063ee624ddf742eaeee5f2557007fdb | |
| parent | a7e47d4bfcbf256fae06891a8599950ff8e1b61b (diff) | |
arm-semi: don't leak 1KB user string lock buffer upon TARGET_SYS_OPEN
Always call unlock_user before returning.
Signed-off-by: Jim Meyering <meyering@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
| -rw-r--r-- | target-arm/arm-semi.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/target-arm/arm-semi.c b/target-arm/arm-semi.c index 24952061cf..73bde584ab 100644 --- a/target-arm/arm-semi.c +++ b/target-arm/arm-semi.c @@ -194,18 +194,19 @@ uint32_t do_arm_semihosting(CPUARMState *env) if (!(s = lock_user_string(ARG(0)))) /* FIXME - should this error code be -TARGET_EFAULT ? */ return (uint32_t)-1; - if (ARG(1) >= 12) + if (ARG(1) >= 12) { + unlock_user(s, ARG(0), 0); return (uint32_t)-1; + } if (strcmp(s, ":tt") == 0) { - if (ARG(1) < 4) - return STDIN_FILENO; - else - return STDOUT_FILENO; + int result_fileno = ARG(1) < 4 ? STDIN_FILENO : STDOUT_FILENO; + unlock_user(s, ARG(0), 0); + return result_fileno; } if (use_gdb_syscalls()) { gdb_do_syscall(arm_semi_cb, "open,%s,%x,1a4", ARG(0), (int)ARG(2)+1, gdb_open_modeflags[ARG(1)]); - return env->regs[0]; + ret = env->regs[0]; } else { ret = set_swi_errno(ts, open(s, open_modeflags[ARG(1)], 0644)); } |