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linux-user: Use g_try_malloc() in do_msgrcv()

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In do_msgrcv() we want to allocate a message buffer, whose size
is passed to us by the guest. That means we could legitimately
fail, so use g_try_malloc() and handle the error case, in the same
way that do_msgsnd() does.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
This commit is contained in:
Peter Maydell 2016-05-20 19:00:57 +01:00 committed by Riku Voipio
parent 99874f6552
commit 415d847110
1 changed files with 5 additions and 1 deletions
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6
linux-user/syscall.c
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@ -3167,7 +3167,11 @@ static inline abi_long do_msgrcv(int msqid, abi_long msgp,
if (!lock_user_struct(VERIFY_WRITE, target_mb, msgp, 0))
return -TARGET_EFAULT;
host_mb = g_malloc(msgsz+sizeof(long));
host_mb = g_try_malloc(msgsz + sizeof(long));
if (!host_mb) {
ret = -TARGET_ENOMEM;
goto end;
}
ret = get_errno(msgrcv(msqid, host_mb, msgsz, msgtyp, msgflg));
if (ret > 0) {