diff options
| -rw-r--r-- | linux-user/syscall.c | 41 |
1 files changed, 25 insertions, 16 deletions
diff --git a/linux-user/syscall.c b/linux-user/syscall.c index f380048cbd..5f72209deb 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -2847,7 +2847,7 @@ static abi_long do_sendrecvmmsg(int fd, abi_ulong target_msgvec, static abi_long do_accept4(int fd, abi_ulong target_addr, abi_ulong target_addrlen_addr, int flags) { - socklen_t addrlen; + socklen_t addrlen, ret_addrlen; void *addr; abi_long ret; int host_flags; @@ -2871,11 +2871,13 @@ static abi_long do_accept4(int fd, abi_ulong target_addr, addr = alloca(addrlen); - ret = get_errno(safe_accept4(fd, addr, &addrlen, host_flags)); + ret_addrlen = addrlen; + ret = get_errno(safe_accept4(fd, addr, &ret_addrlen, host_flags)); if (!is_error(ret)) { - host_to_target_sockaddr(target_addr, addr, addrlen); - if (put_user_u32(addrlen, target_addrlen_addr)) + host_to_target_sockaddr(target_addr, addr, MIN(addrlen, ret_addrlen)); + if (put_user_u32(ret_addrlen, target_addrlen_addr)) { ret = -TARGET_EFAULT; + } } return ret; } @@ -2884,7 +2886,7 @@ static abi_long do_accept4(int fd, abi_ulong target_addr, static abi_long do_getpeername(int fd, abi_ulong target_addr, abi_ulong target_addrlen_addr) { - socklen_t addrlen; + socklen_t addrlen, ret_addrlen; void *addr; abi_long ret; @@ -2900,11 +2902,13 @@ static abi_long do_getpeername(int fd, abi_ulong target_addr, addr = alloca(addrlen); - ret = get_errno(getpeername(fd, addr, &addrlen)); + ret_addrlen = addrlen; + ret = get_errno(getpeername(fd, addr, &ret_addrlen)); if (!is_error(ret)) { - host_to_target_sockaddr(target_addr, addr, addrlen); - if (put_user_u32(addrlen, target_addrlen_addr)) + host_to_target_sockaddr(target_addr, addr, MIN(addrlen, ret_addrlen)); + if (put_user_u32(ret_addrlen, target_addrlen_addr)) { ret = -TARGET_EFAULT; + } } return ret; } @@ -2913,7 +2917,7 @@ static abi_long do_getpeername(int fd, abi_ulong target_addr, static abi_long do_getsockname(int fd, abi_ulong target_addr, abi_ulong target_addrlen_addr) { - socklen_t addrlen; + socklen_t addrlen, ret_addrlen; void *addr; abi_long ret; @@ -2929,11 +2933,13 @@ static abi_long do_getsockname(int fd, abi_ulong target_addr, addr = alloca(addrlen); - ret = get_errno(getsockname(fd, addr, &addrlen)); + ret_addrlen = addrlen; + ret = get_errno(getsockname(fd, addr, &ret_addrlen)); if (!is_error(ret)) { - host_to_target_sockaddr(target_addr, addr, addrlen); - if (put_user_u32(addrlen, target_addrlen_addr)) + host_to_target_sockaddr(target_addr, addr, MIN(addrlen, ret_addrlen)); + if (put_user_u32(ret_addrlen, target_addrlen_addr)) { ret = -TARGET_EFAULT; + } } return ret; } @@ -3005,7 +3011,7 @@ static abi_long do_recvfrom(int fd, abi_ulong msg, size_t len, int flags, abi_ulong target_addr, abi_ulong target_addrlen) { - socklen_t addrlen; + socklen_t addrlen, ret_addrlen; void *addr; void *host_msg; abi_long ret; @@ -3023,10 +3029,12 @@ static abi_long do_recvfrom(int fd, abi_ulong msg, size_t len, int flags, goto fail; } addr = alloca(addrlen); + ret_addrlen = addrlen; ret = get_errno(safe_recvfrom(fd, host_msg, len, flags, - addr, &addrlen)); + addr, &ret_addrlen)); } else { addr = NULL; /* To keep compiler quiet. */ + addrlen = 0; /* To keep compiler quiet. */ ret = get_errno(safe_recvfrom(fd, host_msg, len, flags, NULL, 0)); } if (!is_error(ret)) { @@ -3039,8 +3047,9 @@ static abi_long do_recvfrom(int fd, abi_ulong msg, size_t len, int flags, } } if (target_addr) { - host_to_target_sockaddr(target_addr, addr, addrlen); - if (put_user_u32(addrlen, target_addrlen)) { + host_to_target_sockaddr(target_addr, addr, + MIN(addrlen, ret_addrlen)); + if (put_user_u32(ret_addrlen, target_addrlen)) { ret = -TARGET_EFAULT; goto fail; } |