diff options
| author | Jeff Dike <jdike@addtoit.com> | 2007-03-01 05:13:31 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-03-01 23:53:38 +0100 |
| commit | 14251809b1921b1216568700f1be2f91a1cbb5c7 (patch) | |
| tree | 7162d7623138be81cc733968bf69d0511011d21b /include/math-emu | |
| parent | [PATCH] uml: enable RAW (diff) | |
| download | linux-14251809b1921b1216568700f1be2f91a1cbb5c7.tar.xz linux-14251809b1921b1216568700f1be2f91a1cbb5c7.zip | |
[PATCH] uml: host VDSO fix
This fixes a problem seen by a number of people running UML on newer host
kernels. init would hang with an infinite segfault loop.
It turns out that the host kernel was providing a AT_SYSINFO_EHDR of
0xffffe000, which faked UML into believing that the host VDSO page could be
reused. However, AT_SYSINFO pointed into the middle of the address space, and
was unmapped as a result. Because UML was providing AT_SYSINFO_EHDR and
AT_SYSINFO to its own processes, these would branch to nowhere when trying to
use the VDSO.
The fix is to also check the location of AT_SYSINFO when deciding whether to
use the host's VDSO.
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/math-emu')
0 files changed, 0 insertions, 0 deletions