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Description of problem:
I keep installs of FC1 and FC2test in separate root filesystems, and I
arrange for each one to mount the other in /l/root, such that I can
chroot to it and install updates, which I do pretty much every day.

As of 2-3 days ago (kernel-2.6.5-1.322?), chroot has stopped working:
I just get a segmentation fault.  Tried with selinux in permissive
mode, as well as disabled with selinux=0.

Running /l/root/bin/bash works, but after setting
LD_LIBRARY_PATH=/l/root/lib, it crashes just the same.

Heck, running /l/root/lib/ld-linux.so.2 works, but passing it
/l/root/bin/bash crashes, with or without --list; --verify appears to
work.  LD_ASSUME_KERNEL had no effect.

Since nothing relevant changed in the FC1 tree, I can only guess it is
something in the running kernel.

Version-Release number of selected component (if applicable):
kernel-2.6.5-1.332

How reproducible:
Always

Steps to Reproduce:
1.strace -f chroot FC1's root

Actual Results:  [...]
chroot("/l/root")                       = 0
chdir("/")                              = 0
execve("/bin/bash", ["/bin/bash", "-i"], [/* 28 vars */]) = 0
uname({sys="Linux", node="libero", ...}) = 0
brk(0)                                  = 0x81fc000
open("/etc/ld.so.preload", O_RDONLY)    = -1 ENOENT (No such file or
directory)
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS,
-1, 0) = 0xf70ef000
--- SIGSEGV (Segmentation fault) @ 0 (0) ---


Expected Results:  root#

Additional info:

The crash happens before the old_mmap call in the 2.6.5-1.327.