src/sys/compat/linux/linux_socket.c, branch releng/6.1

MFC 1.62:

2006-01-10T10:13:43+00:00

  Add \n to log() message.

Add missing locking to linux_connect() so that it can be marked MP safe:

2005-07-09T12:26:22+00:00

- Conditionally grab Giant around the EISCONN hack at the end based on
  debug.mpsafenet.
- Protect access to so_emuldata via SOCK_LOCK.

Reviewed by:	rwatson
Approved by:	re (scottl)

Reject packets larger than IP_MAXPACKET in linux_sendto() for sockets

2005-03-23T08:28:00+00:00

with the IP_HDRINCL option set.  Without this change, a Linux process
with access to a raw socket could cause a kernel panic.  Raw sockets
must be created by root, and are generally not consigned to untrusted
applications; hence, the security implications of this bug are
minimal.  I believe this only affects 6-CURRENT on or after 2005-01-30.

Found by:	Coverity Prevent analysis tool
Security:	Local DOS

Add kernel-only flag MSG_NOSIGNAL to be used in emulation layers to surpress

2005-03-08T16:11:41+00:00

SIGPIPE signal for the duration of the sento-family syscalls. Use it to
replace previously added hack in Linux layer based on temporarily setting
SO_NOSIGPIPE flag.

Suggested by:	alfred

Handle MSG_NOSIGNAL flag in linux_send() by setting SO_NOSIGPIPE on socket

2005-03-07T07:26:42+00:00

for the duration of the send() call. Such approach may be less than ideal
in threading environment, when several threads share the same socket and it
might happen that several of them are calling linux_send() at the same time
with and without SO_NOSIGPIPE set.

However, such race condition is very unlikely in practice, therefore this
change provides practical improvement compared to the previous behaviour.

PR:		kern/76426
Submitted by:	Steven Hartland 
MFC after:	3 days

Extend kern_sendit() to take another enum uio_seg argument, which specifies

2005-01-30T07:20:36+00:00

where the buffer to send lies and use it to eliminate yet another stackgap
in linuxlator.

MFC after:	2 weeks

Match the LINUX32's style with existing style

2005-01-14T04:44:56+00:00

Submitted by:	Jung-uk Kim 

Use positive, not negative logic.

Fix the ABI wrappers to use kern_fcntl() rather than calling fcntl()

2004-08-24T20:21:21+00:00

directly.  This removes a few more users of the stackgap and also marks
the syscalls using these wrappers MP safe where appropriate.

Tested on:	i386 with linux acroread5
Compiled on:	i386, alpha LINT

Don't try to translate the control message unless we're certain it's

2004-08-23T12:41:29+00:00

valid; otherwise a caller could trick us into changing any 32-bit word
in kernel memory to LINUX_SOL_SOCKET (0x00000001) if its previous value
is SOL_SOCKET (0x0000ffff).

MFC after:	3 days

Changes to MI Linux emulation code necessary to run 32-bit Linux binaries

2004-08-16T07:28:16+00:00

on AMD64, and the general case where the emulated platform has different
size pointers than we use natively:
- declare certain structure members as l_uintptr_t and use the new PTRIN
  and PTROUT macros to convert to and from native pointers.
- declare some structures __packed on amd64 when the layout would differ
  from that used on i386.
- include  instead of 
  if compiling with COMPAT_LINUX32. This will need to be revisited before
  32-bit and 64-bit Linux emulation support can coexist in the same kernel.
- other small scattered changes.

This should be a no-op on i386 and Alpha.