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| author | Paul Mundt <lethal@linux-sh.org> | 2009-09-01 13:54:14 +0900 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2009-09-01 13:54:14 +0900 |
| commit | ac6a0cf6716bb46813d0161024c66c2af66e53d1 (patch) | |
| tree | c7f53b1a04c590032c022549f3186fb9b04f8358 /mm/nommu.c | |
| parent | e76a0136a3cf1859fbc07f122e42293d22229558 (diff) | |
| parent | ce3f7cb96e67d6518c7fc7b361a76409c3817d64 (diff) | |
| download | lwn-ac6a0cf6716bb46813d0161024c66c2af66e53d1.tar.gz lwn-ac6a0cf6716bb46813d0161024c66c2af66e53d1.zip | |
Merge branch 'master' into sh/smp
Conflicts:
arch/sh/mm/cache-sh4.c
Diffstat (limited to 'mm/nommu.c')
| -rw-r--r-- | mm/nommu.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/mm/nommu.c b/mm/nommu.c index 53cab10fece4..4bde489ec431 100644 --- a/mm/nommu.c +++ b/mm/nommu.c @@ -69,9 +69,6 @@ int sysctl_max_map_count = DEFAULT_MAX_MAP_COUNT; int sysctl_nr_trim_pages = CONFIG_NOMMU_INITIAL_TRIM_EXCESS; int heap_stack_gap = 0; -/* amount of vm to protect from userspace access */ -unsigned long mmap_min_addr = CONFIG_DEFAULT_MMAP_MIN_ADDR; - atomic_long_t mmap_pages_allocated; EXPORT_SYMBOL(mem_map); @@ -922,6 +919,10 @@ static int validate_mmap_request(struct file *file, if (!file->f_op->read) capabilities &= ~BDI_CAP_MAP_COPY; + /* The file shall have been opened with read permission. */ + if (!(file->f_mode & FMODE_READ)) + return -EACCES; + if (flags & MAP_SHARED) { /* do checks for writing, appending and locking */ if ((prot & PROT_WRITE) && |