Tejun Heo ce36394269 mmap: fix petty bug in anonymous shared mmap offset handling ...

Anonymous mappings should ignore offset but shared anonymous mapping
forgot to clear it and makes the following legit test program trigger
SIGBUS.

 #include <sys/mman.h>
 #include <stdio.h>
 #include <errno.h>

 #define PAGE_SIZE	4096

 int main(void)
 {
	 char *p;
	 int i;

	 p = mmap(NULL, 2 * PAGE_SIZE, PROT_READ|PROT_WRITE,
		  MAP_SHARED|MAP_ANONYMOUS, -1, PAGE_SIZE);
	 if (p == MAP_FAILED) {
		 perror("mmap");
		 return 1;
	 }

	 for (i = 0; i < 2; i++) {
		 printf("page %d\n", i);
		 p[i * 4096] = i;
	 }
	 return 0;
 }

Fix it.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Hugh Dickins <hugh@veritas.com>
Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2008-09-03 19:58:53 -07:00

..

allocpercpu.c

mm/allocpercpu.c: make 4 functions static

2008-07-26 12:00:12 -07:00

backing-dev.c

…

bootmem.c

bootmem: fix aligning of node-relative indexes and offsets

2008-08-20 15:40:31 -07:00

bounce.c

…

dmapool.c

…

fadvise.c

…

filemap_xip.c

mm: xip/ext2 fix block allocation race

2008-08-20 15:40:32 -07:00

filemap.c

VFS: fix dio write returning EIO when try_to_release_page fails

2008-09-02 19:21:37 -07:00

fremap.c

mmu-notifiers: core

2008-07-28 16:30:21 -07:00

highmem.c

…

hugetlb.c

allocate structures for reservation tracking in hugetlbfs outside of spinlocks v2

2008-08-12 16:07:28 -07:00

internal.h

…

Kconfig

mm: Make generic weak get_user_pages_fast and EXPORT_GPL it

2008-08-12 17:52:53 +10:00

maccess.c

…

madvise.c

madvise: update function comment of madvise_dontneed

2008-07-30 09:41:45 -07:00

Makefile

mmu-notifiers: core

2008-07-28 16:30:21 -07:00

memcontrol.c

memcg: fix oops in mem_cgroup_shrink_usage

2008-08-12 16:07:28 -07:00

memory_hotplug.c

memory-hotplug: add sysfs removable attribute for hotplug memory remove

2008-07-24 10:47:21 -07:00

memory.c

mm: rename page trylock

2008-08-04 21:31:34 -07:00

mempolicy.c

do_migrate_pages(): remove unused variable

2008-08-12 16:07:29 -07:00

mempool.c

…

migrate.c

mm: rename page trylock

2008-08-04 21:31:34 -07:00

mincore.c

…

mlock.c

mlock() fix return values

2008-08-04 16:58:45 -07:00

mm_init.c

mm: mminit_loglevel cannot be __meminitdata anymore

2008-08-20 15:40:30 -07:00

mmap.c

mmap: fix petty bug in anonymous shared mmap offset handling

2008-09-03 19:58:53 -07:00

mmu_notifier.c

mmu-notifiers: core

2008-07-28 16:30:21 -07:00

mmzone.c

…

mprotect.c

mmu-notifiers: core

2008-07-28 16:30:21 -07:00

mremap.c

mmu-notifiers: core

2008-07-28 16:30:21 -07:00

msync.c

…

nommu.c

nommu: Provide vmalloc_exec().

2008-08-04 16:01:47 +09:00

oom_kill.c

security: Fix setting of PF_SUPERPRIV by __capable()

2008-08-14 22:59:43 +10:00

page_alloc.c

mm/bootmem: silence section mismatch warning - contig_page_data/bootmem_node_data

2008-09-02 19:21:37 -07:00

page_io.c

…

page_isolation.c

Remove '#include <stddef.h>' from mm/page_isolation.c

2008-09-02 09:29:01 +01:00

page-writeback.c

mm: spinlock tree_lock

2008-07-26 12:00:06 -07:00

pagewalk.c

…

pdflush.c

pdflush: use time_after() instead of open-coding it

2008-07-25 10:53:28 -07:00

prio_tree.c

…

quicklist.c

mm: size of quicklists shouldn't be proportional to the number of CPUs

2008-09-02 19:21:38 -07:00

readahead.c

mm: readahead scan lockless

2008-07-26 12:00:06 -07:00

rmap.c

mm: dirty page tracking race fix

2008-08-20 15:40:32 -07:00

shmem_acl.c

[PATCH] sanitize ->permission() prototype

2008-07-26 20:53:14 -04:00

shmem.c

mm: rename page trylock

2008-08-04 21:31:34 -07:00

slab.c

mm: unexport ksize

2008-07-29 23:44:26 +03:00

slob.c

mm: unexport ksize

2008-07-29 23:44:26 +03:00

slub.c

slub: Disable NUMA remote node defragmentation by default

2008-08-20 21:50:21 +03:00

sparse-vmemmap.c

…

sparse.c

mm/sparse.c: removed duplicated include

2008-08-12 16:07:30 -07:00

swap_state.c

mm: show free swap as signed

2008-08-20 15:40:30 -07:00

swap.c

mm: rename page trylock

2008-08-04 21:31:34 -07:00

swapfile.c

mm: rename page trylock

2008-08-04 21:31:34 -07:00

thrash.c

…

tiny-shmem.c

…

truncate.c

VFS: fix dio write returning EIO when try_to_release_page fails

2008-09-02 19:21:37 -07:00

util.c

mm: Make generic weak get_user_pages_fast and EXPORT_GPL it

2008-08-12 17:52:53 +10:00

vmalloc.c

Use WARN() in mm/vmalloc.c

2008-07-26 12:00:07 -07:00

vmscan.c

mm: rename page trylock

2008-08-04 21:31:34 -07:00

vmstat.c

[ARM] Skip memory holes in FLATMEM when reading /proc/pagetypeinfo

2008-08-27 20:09:28 +01:00