diff options
| author | Kees Cook <[email protected]> | 2012-03-23 12:08:55 -0700 |
|---|---|---|
| committer | Thomas Gleixner <[email protected]> | 2012-03-29 11:37:17 +0200 |
| commit | ec0c4274e33c0373e476b73e01995c53128f1257 (patch) | |
| tree | 9a73585bde46f22b3896191efe57393d19966b32 | |
| parent | bdbb776f882f5ad431aa1e694c69c1c3d6a4a5b8 (diff) | |
futex: Mark get_robust_list as deprecated
Notify get_robust_list users that the syscall is going away.
Suggested-by: Thomas Gleixner <[email protected]>
Signed-off-by: Kees Cook <[email protected]>
Cc: Randy Dunlap <[email protected]>
Cc: Darren Hart <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Jiri Kosina <[email protected]>
Cc: Eric W. Biederman <[email protected]>
Cc: David Howells <[email protected]>
Cc: Serge E. Hallyn <[email protected]>
Cc: [email protected]
Cc: [email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Thomas Gleixner <[email protected]>
| -rw-r--r-- | Documentation/feature-removal-schedule.txt | 10 | ||||
| -rw-r--r-- | kernel/futex.c | 2 | ||||
| -rw-r--r-- | kernel/futex_compat.c | 2 |
3 files changed, 14 insertions, 0 deletions
diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt index 0cad4803ffac..c1be8066ea59 100644 --- a/Documentation/feature-removal-schedule.txt +++ b/Documentation/feature-removal-schedule.txt @@ -529,3 +529,13 @@ When: 3.5 Why: The old kmap_atomic() with two arguments is deprecated, we only keep it for backward compatibility for few cycles and then drop it. Who: Cong Wang <[email protected]> + +---------------------------- + +What: get_robust_list syscall +When: 2013 +Why: There appear to be no production users of the get_robust_list syscall, + and it runs the risk of leaking address locations, allowing the bypass + of ASLR. It was only ever intended for debugging, so it should be + removed. +Who: Kees Cook <[email protected]> diff --git a/kernel/futex.c b/kernel/futex.c index d701be57c423..e2b0fb9a0b3b 100644 --- a/kernel/futex.c +++ b/kernel/futex.c @@ -2449,6 +2449,8 @@ SYSCALL_DEFINE3(get_robust_list, int, pid, if (!futex_cmpxchg_enabled) return -ENOSYS; + WARN_ONCE(1, "deprecated: get_robust_list will be deleted in 2013.\n"); + rcu_read_lock(); ret = -ESRCH; diff --git a/kernel/futex_compat.c b/kernel/futex_compat.c index a9642d528630..83e368b005fc 100644 --- a/kernel/futex_compat.c +++ b/kernel/futex_compat.c @@ -142,6 +142,8 @@ compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr, if (!futex_cmpxchg_enabled) return -ENOSYS; + WARN_ONCE(1, "deprecated: get_robust_list will be deleted in 2013.\n"); + rcu_read_lock(); ret = -ESRCH; |