diff options
Diffstat (limited to 'linux-user/syscall.c')
| -rw-r--r-- | linux-user/syscall.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/linux-user/syscall.c b/linux-user/syscall.c index a41dd43b5..a08f5efb0 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -8127,6 +8127,10 @@ abi_long do_syscall(void *cpu_env, int num, abi_ulong arg1, arg4 = arg5; arg5 = arg6; } + if (!arg3) { + ret = 0; + break; + } if (!(p = lock_user(VERIFY_WRITE, arg2, arg3, 0))) goto efault; ret = get_errno(pread64(arg1, p, arg3, target_offset64(arg4, arg5))); @@ -8137,6 +8141,10 @@ abi_long do_syscall(void *cpu_env, int num, abi_ulong arg1, arg4 = arg5; arg5 = arg6; } + if (!arg3) { + ret = 0; + break; + } if (!(p = lock_user(VERIFY_READ, arg2, arg3, 1))) goto efault; ret = get_errno(pwrite64(arg1, p, arg3, target_offset64(arg4, arg5))); |