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[NET]: Fix net/socket.c warnings. 

GCC (correctly) says:

net/socket.c: In function ‘sys_sendto’:
net/socket.c:1510: warning: ‘err’ may be used uninitialized in this function
net/socket.c: In function ‘sys_recvfrom’:
net/socket.c:1571: warning: ‘err’ may be used uninitialized in this function

sock_from_file() either returns filp->private_data or it
sets *err and returns NULL.

Callers return "err" on NULL, but filp->private_data could
be NULL.

Some minor rearrangements of error handling in sys_sendto
and sys_recvfrom solves the issue.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2007-02-08 15:06:08 -08:00
parent 23bb80d215
commit 4387ff75f2
1 changed files with 8 additions and 4 deletions
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12
net/socket.c
View File

@ -1514,8 +1514,9 @@ asmlinkage long sys_sendto(int fd, void __user *buff, size_t len,
struct file *sock_file;
sock_file = fget_light(fd, &fput_needed);
err = -EBADF;
if (!sock_file)
return -EBADF;
goto out;
sock = sock_from_file(sock_file, &err);
if (!sock)
@ -1542,6 +1543,7 @@ asmlinkage long sys_sendto(int fd, void __user *buff, size_t len,
out_put:
fput_light(sock_file, fput_needed);
out:
return err;
}
@ -1573,12 +1575,13 @@ asmlinkage long sys_recvfrom(int fd, void __user *ubuf, size_t size,
int fput_needed;
sock_file = fget_light(fd, &fput_needed);
err = -EBADF;
if (!sock_file)
return -EBADF;
goto out;
sock = sock_from_file(sock_file, &err);
if (!sock)
goto out;
goto out_put;
msg.msg_control = NULL;
msg.msg_controllen = 0;
@ -1597,8 +1600,9 @@ asmlinkage long sys_recvfrom(int fd, void __user *ubuf, size_t size,
if (err2 < 0)
err = err2;
}
out:
out_put:
fput_light(sock_file, fput_needed);
out:
return err;
}