| commit | 49a43876b935c811cfd29d8fe998a6912a1cc5c4 | |
| author | Linus Torvalds <torvalds@osdl.org> | |
| Wed, 18 May 2005 22:39:33 +0000 (18 15:39 -0700) | ||
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | |
| Thu, 19 May 2005 14:46:36 +0000 (19 07:46 -0700) | ||
| tree | c7d7a187a2125518e655dfeadffd38156239ffc3 | treesnapshot (tar.gz zip) |
| parent | 05d3794aa8bd3b2c9f7920a05003c331cdeb75c5 | commitdiff |
[PATCH] prevent NULL mmap in topdown model
Prevent the topdown allocator from allocating mmap areas all the way
down to address zero.
We still allow a MAP_FIXED mapping of page 0 (needed for various things,
ranging from Wine and DOSEMU to people who want to allow speculative
loads off a NULL pointer).
Tested by Chris Wright.
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Prevent the topdown allocator from allocating mmap areas all the way
down to address zero.
We still allow a MAP_FIXED mapping of page 0 (needed for various things,
ranging from Wine and DOSEMU to people who want to allow speculative
loads off a NULL pointer).
Tested by Chris Wright.
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| mm/mmap.c | diffblobblamehistory |