K 10
svn:author
V 3
das
K 8
svn:date
V 27
2004-10-09T17:10:48.000000Z
K 7
svn:log
V 569
MFC src/sys/i386/linux/linux_ptrace.c, v1.14
| Fix the following race:
|
|   1. Process p1 is currently being swapped in.
|   2. Process p2 calls linux_ptrace(PTRACE_GETFPXREGS, p1_pid, ...)
|   3. After acquiring a reference to FIRST_THREAD_IN_PROC(p1),
|      p2 blocks in faultin() while p1 finishes being swapped in.
|      This means p2 won't get back the lock on p1 until after p1's
|      threads are runnable.
|   4. After p1 is swapped in, the first thread in p1 exits.
|   5. p2 now uses its dangling reference to p1's first thread.

Approved by:	re (scottl)

END