Missing safe_read before pointer dereference in drsyscall_linux.c

[Egor-OSSRevival]

Missing safe_read before pointer dereference in drsyscall_linux.c

#2546 #2478

In drsyscall/drsyscall_linux.c, the current code does not include a safe_read before dereferencing arg_ptr. This could lead to potential issues if the pointer is not valid.

int semid;
ASSERT(argnum_semid + 3 < SYSCALL_NUM_ARG_STORE, "index too high");
cmd = (uint) pt->sysarg[argnum_semid + 2];
arg_val = (ptr_int_t) pt->sysarg[argnum_semid + 3];
arg = *(union semun *) &arg_val;
arg_ptr = (union semun *)arg_val;

[PiyushPatle26]

Is this still open ?