| [PATCH] Correct accept(2) recovery after sock_attach_fd() [message #11539] |
Mon, 26 March 2007 15:26  |
Alexey Dobriyan
Messages: 195
Registered: August 2006
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Senior Member |
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* d_alloc() in sock_attach_fd() fails leaving ->f_dentry of new file NULL
* bail out to out_fd label, doing fput()/__fput() on new file
* but __fput() assumes valid ->f_dentry and dereferences it
Signed-off-by: Alexey Dobriyan <adobriyan@sw.ru>
---
net/socket.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
--- a/net/socket.c
+++ b/net/socket.c
@@ -1381,7 +1381,7 @@ asmlinkage long sys_accept(int fd, struc
err = sock_attach_fd(newsock, newfile);
if (err < 0)
- goto out_fd;
+ goto out_fd_simple;
err = security_socket_accept(sock, newsock);
if (err)
@@ -1414,6 +1414,11 @@ out_put:
fput_light(sock->file, fput_needed);
out:
return err;
+out_fd_simple:
+ sock_release(newsock);
+ put_filp(newfile);
+ put_unused_fd(newfd);
+ goto out_put;
out_fd:
fput(newfile);
put_unused_fd(newfd);
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