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| author | Al Viro <viro@zeniv.linux.org.uk> | 2005-09-07 18:28:51 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-09-08 08:14:11 -0700 |
| commit | 8920e8f94c44e31a73bdf923b04721e26e88cadd (patch) | |
| tree | 7a0195643c37c63335224358256fab8cd445a671 /include/net/compat.h | |
| parent | 5aa3b610a7330c3cd6f0cb264d2189a3a1dcf534 (diff) | |
| download | linux-8920e8f94c44e31a73bdf923b04721e26e88cadd.tar.gz linux-8920e8f94c44e31a73bdf923b04721e26e88cadd.tar.bz2 linux-8920e8f94c44e31a73bdf923b04721e26e88cadd.zip | |
[PATCH] Fix 32bit sendmsg() flaw
When we copy 32bit ->msg_control contents to kernel, we walk the same
userland data twice without sanity checks on the second pass.
Second version of this patch: the original broke with 64-bit arches
running 32-bit-compat-mode executables doing sendmsg() syscalls with
unaligned CMSG data areas
Another thing is that we use kmalloc() to allocate and sock_kfree_s()
to free afterwards; less serious, but also needs fixing.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Chris Wright <chrisw@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/net/compat.h')
| -rw-r--r-- | include/net/compat.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/net/compat.h b/include/net/compat.h index 9983fd857804..482eb820f13a 100644 --- a/include/net/compat.h +++ b/include/net/compat.h @@ -33,7 +33,7 @@ extern asmlinkage long compat_sys_sendmsg(int,struct compat_msghdr __user *,unsi extern asmlinkage long compat_sys_recvmsg(int,struct compat_msghdr __user *,unsigned); extern asmlinkage long compat_sys_getsockopt(int, int, int, char __user *, int __user *); extern int put_cmsg_compat(struct msghdr*, int, int, int, void *); -extern int cmsghdr_from_user_compat_to_kern(struct msghdr *, unsigned char *, +extern int cmsghdr_from_user_compat_to_kern(struct msghdr *, struct sock *, unsigned char *, int); #endif /* NET_COMPAT_H */ |