diff options
Diffstat (limited to 'ipc-shm-fix-information-leak-to-user.patch')
| -rw-r--r-- | ipc-shm-fix-information-leak-to-user.patch | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/ipc-shm-fix-information-leak-to-user.patch b/ipc-shm-fix-information-leak-to-user.patch new file mode 100644 index 0000000..b23ad43 --- /dev/null +++ b/ipc-shm-fix-information-leak-to-user.patch @@ -0,0 +1,30 @@ +From: Vasiliy Kulikov <segooon@gmail.com> +Date: Sat, 30 Oct 2010 14:22:49 +0000 (+0400) +Subject: ipc: shm: fix information leak to userland +X-Git-Tag: v2.6.37-rc1~24 +X-Git-Url: http://git.kernel.org/?p=linux%2Fkernel%2Fgit%2Ftorvalds%2Flinux-2.6.git;a=commitdiff_plain;h=3af54c9bd9e6f14f896aac1bb0e8405ae0bc7a44 + +ipc: shm: fix information leak to userland + +The shmid_ds structure is copied to userland with shm_unused{,2,3} +fields unitialized. It leads to leaking of contents of kernel stack +memory. + +Signed-off-by: Vasiliy Kulikov <segooon@gmail.com> +Acked-by: Al Viro <viro@ZenIV.linux.org.uk> +Cc: stable@kernel.org +Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> +--- + +diff --git a/ipc/shm.c b/ipc/shm.c +index fd658a1..7d3bb22 100644 +--- a/ipc/shm.c ++++ b/ipc/shm.c +@@ -479,6 +479,7 @@ static inline unsigned long copy_shmid_to_user(void __user *buf, struct shmid64_ + { + struct shmid_ds out; + ++ memset(&out, 0, sizeof(out)); + ipc64_perm_to_ipc_perm(&in->shm_perm, &out.shm_perm); + out.shm_segsz = in->shm_segsz; + out.shm_atime = in->shm_atime; |