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| author | David Gibson <david@gibson.dropbear.id.au> | 2005-11-30 04:34:32 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-11-30 04:47:03 +0100 |
| commit | 5bd0190bf3d7e53043a048e809ffa29d41b9d6ac (patch) | |
| tree | c6fba8d5a532ecfa53dc97a3841d13d972964854 /arch/i386 | |
| parent | [PATCH] process events connector: uid_t gid_t size issues (diff) | |
| download | linux-5bd0190bf3d7e53043a048e809ffa29d41b9d6ac.tar.xz linux-5bd0190bf3d7e53043a048e809ffa29d41b9d6ac.zip | |
[PATCH] Fix crash when ptrace poking hugepage areas
set_page_dirty() will not cope with being handed a page * which is part of
a compound page, but not the master page in that compound page. This case
can occur via access_process_vm() if you attemp to write to another
process's hugepage memory area using ptrace() (causing an oops or hang).
This patch fixes the bug by only calling set_page_dirty() from
access_process_vm() if the page is not a compound page. We already use a
similar fix in bio_set_pages_dirty() for the case of direct io to
hugepages.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Acked-by: William Irwin <wli@holomorphy.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/i386')
0 files changed, 0 insertions, 0 deletions