linux-sg2042/mm
William Lee Irwin III cafdd8ba08 [PATCH] try_to_unmap_cluster() passes out-of-bounds pte to pte_unmap()
try_to_unmap_cluster() does:
        for (pte = pte_offset_map(pmd, address);
                        address < end; pte++, address += PAGE_SIZE) {
		...
	}

	pte_unmap(pte);

It may take a little staring to notice, but pte can actually fall off the
end of the pte page in this iteration, which makes life difficult for
kmap_atomic() and the users not expecting it to BUG().  Of course, we're
somewhat lucky in that arithmetic elsewhere in the function guarantees that
at least one iteration is made, lest this force larger rearrangements to be
made.  This issue and patch also apply to non-mm mainline and with trivial
adjustments, at least two related kernels.

Discovered during internal testing at Oracle.

Signed-off-by: William Irwin <wli@holomorphy.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-05-24 20:08:13 -07:00
..
Makefile Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
bootmem.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
fadvise.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
filemap.c [PATCH] fix for __generic_file_aio_read() to return 0 on EOF 2005-05-21 16:45:24 -07:00
fremap.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
highmem.c [PATCH] count bounce buffer pages in vmstat 2005-05-01 08:58:37 -07:00
hugetlb.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
internal.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
madvise.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
memory.c [PATCH] do_swap_page() can map random data if swap read fails 2005-05-17 07:59:20 -07:00
mempolicy.c [PATCH] mempolicy.c GFP fix 2005-04-24 12:28:34 -07:00
mempool.c [PATCH] use smp_mb/wmb/rmb where possible 2005-05-01 08:58:47 -07:00
mincore.c [PATCH] freepgt: sys_mincore ignore FIRST_USER_PGD_NR 2005-04-19 13:29:20 -07:00
mlock.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
mmap.c Fix get_unmapped_area sanity tests 2005-05-19 22:43:37 -07:00
mprotect.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
mremap.c [PATCH] mm acct accounting fix 2005-05-17 07:59:12 -07:00
msync.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
nommu.c [PATCH] mm/nommu.c: try to fix __vmalloc 2005-05-17 07:59:17 -07:00
oom_kill.c [PATCH] oom-killer disable for iscsi/lvm2/multipath userland critical sections 2005-04-16 15:24:05 -07:00
page-writeback.c [PATCH] DocBook: fix some descriptions 2005-05-01 08:59:26 -07:00
page_alloc.c [IA64] Export node_online_map and node_possible_map 2005-05-03 12:09:32 -07:00
page_io.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
pdflush.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
prio_tree.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
readahead.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
rmap.c [PATCH] try_to_unmap_cluster() passes out-of-bounds pte to pte_unmap() 2005-05-24 20:08:13 -07:00
shmem.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
slab.c [PATCH] Change synchronize_kernel to _rcu and _sched 2005-05-01 08:59:04 -07:00
swap.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
swap_state.c [PATCH] mm: use __GFP_NOMEMALLOC 2005-05-01 08:58:37 -07:00
swapfile.c [PATCH] swapout oops fix 2005-05-17 07:59:18 -07:00
thrash.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
tiny-shmem.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
truncate.c [PATCH] DocBook: fix some descriptions 2005-05-01 08:59:26 -07:00
vmalloc.c [PATCH] x86_64: Fixed guard page handling again in iounmap 2005-05-20 15:48:20 -07:00
vmscan.c [PATCH] vmscan: pageout(): remove unneeded test 2005-04-16 15:24:06 -07:00