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[Qemu-devel] [PATCH 06/12] linux-user: Detect Negative Message Sizes in
From: |
Tom Musta |
Subject: |
[Qemu-devel] [PATCH 06/12] linux-user: Detect Negative Message Sizes in msgsnd System Call |
Date: |
Mon, 4 Aug 2014 11:45:33 -0500 |
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 <address@hidden>
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index c0c0434..f524a39 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -2870,12 +2870,16 @@ 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));
--
1.7.1
- [Qemu-devel] [PATCH 01/12] linux-user: PPC64 semid_ds Doesnt Include _unused1 and _unused2, (continued)
- [Qemu-devel] [PATCH 01/12] linux-user: PPC64 semid_ds Doesnt Include _unused1 and _unused2, Tom Musta, 2014/08/04
- [Qemu-devel] [PATCH 02/12] linux-user: Dereference Pointer Argument to ipc/semctl Sys Call, Tom Musta, 2014/08/04
- [Qemu-devel] [PATCH 03/12] linux-user: Properly Handle semun Structure In Cross-Endian Situations, Tom Musta, 2014/08/04
- [Qemu-devel] [PATCH 04/12] linux-user: Make ipc syscall's third argument an abi_long, Tom Musta, 2014/08/04
- [Qemu-devel] [PATCH 05/12] linux-user: Conditionally Pass Attribute Pointer to mq_open(), Tom Musta, 2014/08/04
- [Qemu-devel] [PATCH 06/12] linux-user: Detect Negative Message Sizes in msgsnd System Call,
Tom Musta <=
- [Qemu-devel] [PATCH 07/12] linux-user: Handle NULL argument to sched_{get, set}param, Tom Musta, 2014/08/04
- [Qemu-devel] [PATCH 08/12] linux-user: Detect fault in sched_rr_get_interval, Tom Musta, 2014/08/04
- [Qemu-devel] [PATCH 09/12] linux-user: Minimum Sig Handler Stack Size for PPC64 ELF V2, Tom Musta, 2014/08/04
- [Qemu-devel] [PATCH 10/12] linux-user: clock_nanosleep errno Handling on PPC, Tom Musta, 2014/08/04