The patch titled
capabilities: reset current->pdeath_signal when increasing capabilities
has been added to the -mm tree. Its filename is
capabilities-reset-current-pdeath_signal-when-increasing-capabilities.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: capabilities: reset current->pdeath_signal when increasing capabilities
From: "Serge E. Hallyn" <serge@xxxxxxxxxx>
If running a program which has file capabilities which are not a subset of
the capabilities of the current task, reset pdeath_signal = 0 to prevent
the task parent from (deliberately) signaling a more privileged app.
Signed-off-by: Serge E. Hallyn <serue@xxxxxxxxxx>
Cc: Andrew Morgan <morgan@xxxxxxxxxx>
Cc: Casey Schaufler <casey@xxxxxxxxxxxxxxxx>
Cc: Chris Wright <chrisw@xxxxxxxxxxxx>
Cc: James Morris <jmorris@xxxxxxxxx>
Cc: Stephen Smalley <sds@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
security/commoncap.c | 1 +
1 files changed, 1 insertion(+)
diff -puN security/commoncap.c~capabilities-reset-current-pdeath_signal-when-increasing-capabilities security/commoncap.c
--- a/security/commoncap.c~capabilities-reset-current-pdeath_signal-when-increasing-capabilities
+++ a/security/commoncap.c
@@ -267,6 +267,7 @@ void cap_bprm_apply_creds (struct linux_
if (bprm->e_uid != current->uid || bprm->e_gid != current->gid ||
!cap_issubset (new_permitted, current->cap_permitted)) {
set_dumpable(current->mm, suid_dumpable);
+ current->pdeath_signal = 0;
if (unsafe & ~LSM_UNSAFE_PTRACE_CAP) {
if (!capable(CAP_SETUID)) {
_
Patches currently in -mm which might be from serge@xxxxxxxxxx are
memoryless-nodes-generic-management-of-nodemasks-for-various-purposes-fix.patch
ifdef-struct-task_structsecurity.patch
capabilities-reset-current-pdeath_signal-when-increasing-capabilities.patch
ecryptfs-add-key-list-structure-search-keyring.patch
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