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| author | David S. Miller <davem@davemloft.net> | 2013-12-19 01:42:06 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-12-19 01:42:06 +0400 |
| commit | 143c9054949436cb05e468439dc5e46231f33d09 (patch) | |
| tree | c2e972d8188fb1b36368e9acb5b6b59466c9d903 /kernel/futex.c | |
| parent | 0b6807034791160d5e584138943d2daea765436d (diff) | |
| parent | 35eecf052250f663f07a4cded7d3503fd1b50729 (diff) | |
| download | linux-143c9054949436cb05e468439dc5e46231f33d09.tar.xz | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Conflicts:
drivers/net/ethernet/intel/i40e/i40e_main.c
drivers/net/macvtap.c
Both minor merge hassles, simple overlapping changes.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'kernel/futex.c')
| -rw-r--r-- | kernel/futex.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/kernel/futex.c b/kernel/futex.c index 80ba086f021d..f6ff0191ecf7 100644 --- a/kernel/futex.c +++ b/kernel/futex.c @@ -251,6 +251,9 @@ get_futex_key(u32 __user *uaddr, int fshared, union futex_key *key, int rw) return -EINVAL; address -= key->both.offset; + if (unlikely(!access_ok(rw, uaddr, sizeof(u32)))) + return -EFAULT; + /* * PROCESS_PRIVATE futexes are fast. * As the mm cannot disappear under us and the 'key' only needs @@ -259,8 +262,6 @@ get_futex_key(u32 __user *uaddr, int fshared, union futex_key *key, int rw) * but access_ok() should be faster than find_vma() */ if (!fshared) { - if (unlikely(!access_ok(VERIFY_WRITE, uaddr, sizeof(u32)))) - return -EFAULT; key->private.mm = mm; key->private.address = address; get_futex_key_refs(key); @@ -288,7 +289,7 @@ again: put_page(page); /* serialize against __split_huge_page_splitting() */ local_irq_disable(); - if (likely(__get_user_pages_fast(address, 1, 1, &page) == 1)) { + if (likely(__get_user_pages_fast(address, 1, !ro, &page) == 1)) { page_head = compound_head(page); /* * page_head is valid pointer but we must pin |