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authorLinus Torvalds <torvalds@linux-foundation.org>2012-10-25 16:05:57 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-10-25 16:05:57 -0700
commit2ab3f29dddfb444c9fcc0a2f3a56ed4bdba41969 (patch)
treeb1999129c781fbd524c921c4ebfde029a48cca17 /kernel
parentb1e4279e4ef5549bf6ebf8f6f17dd26f0af8e8a2 (diff)
parent12176503366885edd542389eed3aaf94be163fdb (diff)
Merge branch 'akpm' (Andrew's fixes)
Merge misc fixes from Andrew Morton: "18 total. 15 fixes and some updates to a device_cgroup patchset which bring it up to date with the version which I should have merged in the first place." * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (18 patches) fs/compat_ioctl.c: VIDEO_SET_SPU_PALETTE missing error check gen_init_cpio: avoid stack overflow when expanding drivers/rtc/rtc-imxdi.c: add missing spin lock initialization mm, numa: avoid setting zone_reclaim_mode unless a node is sufficiently distant pidns: limit the nesting depth of pid namespaces drivers/dma/dw_dmac: make driver's endianness configurable mm/mmu_notifier: allocate mmu_notifier in advance tools/testing/selftests/epoll/test_epoll.c: fix build UAPI: fix tools/vm/page-types.c mm/page_alloc.c:alloc_contig_range(): return early for err path rbtree: include linux/compiler.h for definition of __always_inline genalloc: stop crashing the system when destroying a pool backlight: ili9320: add missing SPI dependency device_cgroup: add proper checking when changing default behavior device_cgroup: stop using simple_strtoul() device_cgroup: rename deny_all to behavior cgroup: fix invalid rcu dereference mm: fix XFS oops due to dirty pages without buffers on s390
Diffstat (limited to 'kernel')
-rw-r--r--kernel/pid_namespace.c12
1 files changed, 11 insertions, 1 deletions
diff --git a/kernel/pid_namespace.c b/kernel/pid_namespace.c
index eb00be20581..7b07cc0dfb7 100644
--- a/kernel/pid_namespace.c
+++ b/kernel/pid_namespace.c
@@ -71,12 +71,22 @@ err_alloc:
return NULL;
}
+/* MAX_PID_NS_LEVEL is needed for limiting size of 'struct pid' */
+#define MAX_PID_NS_LEVEL 32
+
static struct pid_namespace *create_pid_namespace(struct pid_namespace *parent_pid_ns)
{
struct pid_namespace *ns;
unsigned int level = parent_pid_ns->level + 1;
- int i, err = -ENOMEM;
+ int i;
+ int err;
+
+ if (level > MAX_PID_NS_LEVEL) {
+ err = -EINVAL;
+ goto out;
+ }
+ err = -ENOMEM;
ns = kmem_cache_zalloc(pid_ns_cachep, GFP_KERNEL);
if (ns == NULL)
goto out;