diff options
| author | Tom Musta <tommusta@gmail.com> | 2014-08-12 13:53:37 -0500 |
|---|---|---|
| committer | Riku Voipio <riku.voipio@linaro.org> | 2014-08-22 15:06:35 +0300 |
| commit | edcc5f9dc39309d32f4b3737e6b750ae967f5bbd (patch) | |
| tree | e1e2948466ac9057566dff7aa8e4b5d10b62c6ee | |
| parent | b6ce1f6b90903961f66b0aec7be75d6c94560e40 (diff) | |
linux-user: Detect Negative Message Sizes in msgsnd System Call
The msgsnd system call takes an argument that describes the message
size (msgsz) and is of type size_t. The system call should set
errno to EINVAL in the event that a negative message size is passed.
Signed-off-by: Tom Musta <tommusta@gmail.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
| -rw-r--r-- | linux-user/syscall.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/linux-user/syscall.c b/linux-user/syscall.c index e754dbb3fa..2549249a08 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -2879,12 +2879,16 @@ struct target_msgbuf { }; static inline abi_long do_msgsnd(int msqid, abi_long msgp, - unsigned int msgsz, int msgflg) + ssize_t msgsz, int msgflg) { struct target_msgbuf *target_mb; struct msgbuf *host_mb; abi_long ret = 0; + if (msgsz < 0) { + return -TARGET_EINVAL; + } + if (!lock_user_struct(VERIFY_READ, target_mb, msgp, 0)) return -TARGET_EFAULT; host_mb = malloc(msgsz+sizeof(long)); |