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From: ebiederm@xmission.com (Eric W. Biederman)
To: <linux-kernel@vger.kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
	Oleg Nesterov <oleg@redhat.com>, Jann Horn <jannh@google.com>,
	Kees Cook <keescook@chromium.org>,
	Greg Ungerer <gerg@linux-m68k.org>, Rob Landley <rob@landley.net>,
	Bernd Edlinger <bernd.edlinger@hotmail.de>,
	<linux-fsdevel@vger.kernel.org>,
	Al Viro <viro@ZenIV.linux.org.uk>,
	Alexey Dobriyan <adobriyan@gmail.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Casey Schaufler <casey@schaufler-ca.com>,
	linux-security-module@vger.kernel.org,
	James Morris <jmorris@namei.org>,
	"Serge E. Hallyn" <serge@hallyn.com>,
	Andy Lutomirski <luto@amacapital.net>
Subject: [PATCH v2 2/8] exec: Factor security_bprm_creds_for_exec out of security_bprm_set_creds
Date: Mon, 18 May 2020 19:30:10 -0500
Message-ID: <87v9kszrzh.fsf_-_@x220.int.ebiederm.org> (raw)
In-Reply-To: <877dx822er.fsf_-_@x220.int.ebiederm.org> (Eric W. Biederman's message of "Mon, 18 May 2020 19:29:00 -0500")


Today security_bprm_set_creds has several implementations:
apparmor_bprm_set_creds, cap_bprm_set_creds, selinux_bprm_set_creds,
smack_bprm_set_creds, and tomoyo_bprm_set_creds.

Except for cap_bprm_set_creds they all test bprm->called_set_creds and
return immediately if it is true.  The function cap_bprm_set_creds
ignores bprm->calld_sed_creds entirely.

Create a new LSM hook security_bprm_creds_for_exec that is called just
before prepare_binprm in __do_execve_file, resulting in a LSM hook
that is called exactly once for the entire of exec.  Modify the bits
of security_bprm_set_creds that only want to be called once per exec
into security_bprm_creds_for_exec, leaving only cap_bprm_set_creds
behind.

Remove bprm->called_set_creds all of it's former users have been moved
to security_bprm_creds_for_exec.

Add or upate comments a appropriate to bring them up to date and
to reflect this change.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
---
 fs/exec.c                          |  6 +++-
 include/linux/binfmts.h            | 18 +++--------
 include/linux/lsm_hook_defs.h      |  1 +
 include/linux/lsm_hooks.h          | 50 +++++++++++++++++-------------
 include/linux/security.h           |  6 ++++
 security/apparmor/domain.c         |  7 ++---
 security/apparmor/include/domain.h |  2 +-
 security/apparmor/lsm.c            |  2 +-
 security/security.c                |  5 +++
 security/selinux/hooks.c           |  8 ++---
 security/smack/smack_lsm.c         |  9 ++----
 security/tomoyo/tomoyo.c           | 12 ++-----
 12 files changed, 63 insertions(+), 63 deletions(-)

diff --git a/fs/exec.c b/fs/exec.c
index 14b786158aa9..9e70da47f8d9 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -1640,7 +1640,6 @@ int prepare_binprm(struct linux_binprm *bprm)
 	retval = security_bprm_set_creds(bprm);
 	if (retval)
 		return retval;
-	bprm->called_set_creds = 1;
 
 	memset(bprm->buf, 0, BINPRM_BUF_SIZE);
 	return kernel_read(bprm->file, bprm->buf, BINPRM_BUF_SIZE, &pos);
@@ -1855,6 +1854,11 @@ static int __do_execve_file(int fd, struct filename *filename,
 	if (retval < 0)
 		goto out;
 
+	/* Set the unchanging part of bprm->cred */
+	retval = security_bprm_creds_for_exec(bprm);
+	if (retval)
+		goto out;
+
 	retval = prepare_binprm(bprm);
 	if (retval < 0)
 		goto out;
diff --git a/include/linux/binfmts.h b/include/linux/binfmts.h
index 1b48e2154766..d1217fcdedea 100644
--- a/include/linux/binfmts.h
+++ b/include/linux/binfmts.h
@@ -27,22 +27,14 @@ struct linux_binprm {
 	unsigned long argmin; /* rlimit marker for copy_strings() */
 	unsigned int
 		/*
-		 * True after the bprm_set_creds hook has been called once
-		 * (multiple calls can be made via prepare_binprm() for
-		 * binfmt_script/misc).
-		 */
-		called_set_creds:1,
-		/*
-		 * True if most recent call to the commoncaps bprm_set_creds
-		 * hook (due to multiple prepare_binprm() calls from the
-		 * binfmt_script/misc handlers) resulted in elevated
-		 * privileges.
+		 * True if most recent call to cap_bprm_set_creds
+		 * resulted in elevated privileges.
 		 */
 		cap_elevated:1,
 		/*
-		 * Set by bprm_set_creds hook to indicate a privilege-gaining
-		 * exec has happened. Used to sanitize execution environment
-		 * and to set AT_SECURE auxv for glibc.
+		 * Set by bprm_creds_for_exec hook to indicate a
+		 * privilege-gaining exec has happened. Used to set
+		 * AT_SECURE auxv for glibc.
 		 */
 		secureexec:1,
 		/*
diff --git a/include/linux/lsm_hook_defs.h b/include/linux/lsm_hook_defs.h
index 9cd4455528e5..aab0695f41df 100644
--- a/include/linux/lsm_hook_defs.h
+++ b/include/linux/lsm_hook_defs.h
@@ -49,6 +49,7 @@ LSM_HOOK(int, 0, syslog, int type)
 LSM_HOOK(int, 0, settime, const struct timespec64 *ts,
 	 const struct timezone *tz)
 LSM_HOOK(int, 0, vm_enough_memory, struct mm_struct *mm, long pages)
+LSM_HOOK(int, 0, bprm_creds_for_exec, struct linux_binprm *bprm)
 LSM_HOOK(int, 0, bprm_set_creds, struct linux_binprm *bprm)
 LSM_HOOK(int, 0, bprm_check_security, struct linux_binprm *bprm)
 LSM_HOOK(void, LSM_RET_VOID, bprm_committing_creds, struct linux_binprm *bprm)
diff --git a/include/linux/lsm_hooks.h b/include/linux/lsm_hooks.h
index 988ca0df7824..c719af37df20 100644
--- a/include/linux/lsm_hooks.h
+++ b/include/linux/lsm_hooks.h
@@ -34,40 +34,46 @@
  *
  * Security hooks for program execution operations.
  *
+ * @bprm_creds_for_exec:
+ *	If the setup in prepare_exec_creds did not setup @bprm->cred->security
+ *	properly for executing @bprm->file, update the LSM's portion of
+ *	@bprm->cred->security to be what commit_creds needs to install for the
+ *	new program.  This hook may also optionally check permissions
+ *	(e.g. for transitions between security domains).
+ *	The hook must set @bprm->secureexec to 1 if AT_SECURE should be set to
+ *	request libc enable secure mode.
+ *	@bprm contains the linux_binprm structure.
+ *	Return 0 if the hook is successful and permission is granted.
  * @bprm_set_creds:
- *	Save security information in the bprm->security field, typically based
- *	on information about the bprm->file, for later use by the apply_creds
- *	hook.  This hook may also optionally check permissions (e.g. for
+ *	Assuming that the relevant bits of @bprm->cred->security have been
+ *	previously set, examine @bprm->file and regenerate them.  This is
+ *	so that the credentials derived from the interpreter the code is
+ *	actually going to run are used rather than credentials derived
+ *	from a script.  This done because the interpreter binary needs to
+ *	reopen script, and may end up opening something completely different.
+ *	This hook may also optionally check permissions (e.g. for
  *	transitions between security domains).
- *	This hook may be called multiple times during a single execve, e.g. for
- *	interpreters.  The hook can tell whether it has already been called by
- *	checking to see if @bprm->security is non-NULL.  If so, then the hook
- *	may decide either to retain the security information saved earlier or
- *	to replace it.  The hook must set @bprm->secureexec to 1 if a "secure
- *	exec" has happened as a result of this hook call.  The flag is used to
- *	indicate the need for a sanitized execution environment, and is also
- *	passed in the ELF auxiliary table on the initial stack to indicate
- *	whether libc should enable secure mode.
+ *	The hook must set @bprm->cap_elevated to 1 if AT_SECURE should be set to
+ *	request libc enable secure mode.
  *	@bprm contains the linux_binprm structure.
  *	Return 0 if the hook is successful and permission is granted.
  * @bprm_check_security:
  *	This hook mediates the point when a search for a binary handler will
- *	begin.  It allows a check the @bprm->security value which is set in the
- *	preceding set_creds call.  The primary difference from set_creds is
- *	that the argv list and envp list are reliably available in @bprm.  This
- *	hook may be called multiple times during a single execve; and in each
- *	pass set_creds is called first.
+ *	begin.  It allows a check against the @bprm->cred->security value
+ *	which was set in the preceding creds_for_exec call.  The argv list and
+ *	envp list are reliably available in @bprm.  This hook may be called
+ *	multiple times during a single execve.
  *	@bprm contains the linux_binprm structure.
  *	Return 0 if the hook is successful and permission is granted.
  * @bprm_committing_creds:
  *	Prepare to install the new security attributes of a process being
  *	transformed by an execve operation, based on the old credentials
  *	pointed to by @current->cred and the information set in @bprm->cred by
- *	the bprm_set_creds hook.  @bprm points to the linux_binprm structure.
- *	This hook is a good place to perform state changes on the process such
- *	as closing open file descriptors to which access will no longer be
- *	granted when the attributes are changed.  This is called immediately
- *	before commit_creds().
+ *	the bprm_creds_for_exec hook.  @bprm points to the linux_binprm
+ *	structure.  This hook is a good place to perform state changes on the
+ *	process such as closing open file descriptors to which access will no
+ *	longer be granted when the attributes are changed.  This is called
+ *	immediately before commit_creds().
  * @bprm_committed_creds:
  *	Tidy up after the installation of the new security attributes of a
  *	process being transformed by an execve operation.  The new credentials
diff --git a/include/linux/security.h b/include/linux/security.h
index a8d9310472df..1bd7a6582775 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -276,6 +276,7 @@ int security_quota_on(struct dentry *dentry);
 int security_syslog(int type);
 int security_settime64(const struct timespec64 *ts, const struct timezone *tz);
 int security_vm_enough_memory_mm(struct mm_struct *mm, long pages);
+int security_bprm_creds_for_exec(struct linux_binprm *bprm);
 int security_bprm_set_creds(struct linux_binprm *bprm);
 int security_bprm_check(struct linux_binprm *bprm);
 void security_bprm_committing_creds(struct linux_binprm *bprm);
@@ -569,6 +570,11 @@ static inline int security_vm_enough_memory_mm(struct mm_struct *mm, long pages)
 	return __vm_enough_memory(mm, pages, cap_vm_enough_memory(mm, pages));
 }
 
+static inline int security_bprm_creds_for_exec(struct linux_binprm *bprm)
+{
+	return 0;
+}
+
 static inline int security_bprm_set_creds(struct linux_binprm *bprm)
 {
 	return cap_bprm_set_creds(bprm);
diff --git a/security/apparmor/domain.c b/security/apparmor/domain.c
index 6ceb74e0f789..0b870a647488 100644
--- a/security/apparmor/domain.c
+++ b/security/apparmor/domain.c
@@ -854,14 +854,14 @@ static struct aa_label *handle_onexec(struct aa_label *label,
 }
 
 /**
- * apparmor_bprm_set_creds - set the new creds on the bprm struct
+ * apparmor_bprm_creds_for_exec - Update the new creds on the bprm struct
  * @bprm: binprm for the exec  (NOT NULL)
  *
  * Returns: %0 or error on failure
  *
  * TODO: once the other paths are done see if we can't refactor into a fn
  */
-int apparmor_bprm_set_creds(struct linux_binprm *bprm)
+int apparmor_bprm_creds_for_exec(struct linux_binprm *bprm)
 {
 	struct aa_task_ctx *ctx;
 	struct aa_label *label, *new = NULL;
@@ -875,9 +875,6 @@ int apparmor_bprm_set_creds(struct linux_binprm *bprm)
 		file_inode(bprm->file)->i_mode
 	};
 
-	if (bprm->called_set_creds)
-		return 0;
-
 	ctx = task_ctx(current);
 	AA_BUG(!cred_label(bprm->cred));
 	AA_BUG(!ctx);
diff --git a/security/apparmor/include/domain.h b/security/apparmor/include/domain.h
index 21b875fe2d37..d14928fe1c6f 100644
--- a/security/apparmor/include/domain.h
+++ b/security/apparmor/include/domain.h
@@ -30,7 +30,7 @@ struct aa_domain {
 struct aa_label *x_table_lookup(struct aa_profile *profile, u32 xindex,
 				const char **name);
 
-int apparmor_bprm_set_creds(struct linux_binprm *bprm);
+int apparmor_bprm_creds_for_exec(struct linux_binprm *bprm);
 
 void aa_free_domain_entries(struct aa_domain *domain);
 int aa_change_hat(const char *hats[], int count, u64 token, int flags);
diff --git a/security/apparmor/lsm.c b/security/apparmor/lsm.c
index b621ad74f54a..3623ab08279d 100644
--- a/security/apparmor/lsm.c
+++ b/security/apparmor/lsm.c
@@ -1232,7 +1232,7 @@ static struct security_hook_list apparmor_hooks[] __lsm_ro_after_init = {
 	LSM_HOOK_INIT(cred_prepare, apparmor_cred_prepare),
 	LSM_HOOK_INIT(cred_transfer, apparmor_cred_transfer),
 
-	LSM_HOOK_INIT(bprm_set_creds, apparmor_bprm_set_creds),
+	LSM_HOOK_INIT(bprm_creds_for_exec, apparmor_bprm_creds_for_exec),
 	LSM_HOOK_INIT(bprm_committing_creds, apparmor_bprm_committing_creds),
 	LSM_HOOK_INIT(bprm_committed_creds, apparmor_bprm_committed_creds),
 
diff --git a/security/security.c b/security/security.c
index 7fed24b9d57e..4ee76a729f73 100644
--- a/security/security.c
+++ b/security/security.c
@@ -823,6 +823,11 @@ int security_vm_enough_memory_mm(struct mm_struct *mm, long pages)
 	return __vm_enough_memory(mm, pages, cap_sys_admin);
 }
 
+int security_bprm_creds_for_exec(struct linux_binprm *bprm)
+{
+	return call_int_hook(bprm_creds_for_exec, 0, bprm);
+}
+
 int security_bprm_set_creds(struct linux_binprm *bprm)
 {
 	return call_int_hook(bprm_set_creds, 0, bprm);
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 0b4e32161b77..718345dd76bb 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -2286,7 +2286,7 @@ static int check_nnp_nosuid(const struct linux_binprm *bprm,
 	return -EACCES;
 }
 
-static int selinux_bprm_set_creds(struct linux_binprm *bprm)
+static int selinux_bprm_creds_for_exec(struct linux_binprm *bprm)
 {
 	const struct task_security_struct *old_tsec;
 	struct task_security_struct *new_tsec;
@@ -2297,8 +2297,6 @@ static int selinux_bprm_set_creds(struct linux_binprm *bprm)
 
 	/* SELinux context only depends on initial program or script and not
 	 * the script interpreter */
-	if (bprm->called_set_creds)
-		return 0;
 
 	old_tsec = selinux_cred(current_cred());
 	new_tsec = selinux_cred(bprm->cred);
@@ -6385,7 +6383,7 @@ static int selinux_setprocattr(const char *name, void *value, size_t size)
 	/* Permission checking based on the specified context is
 	   performed during the actual operation (execve,
 	   open/mkdir/...), when we know the full context of the
-	   operation.  See selinux_bprm_set_creds for the execve
+	   operation.  See selinux_bprm_creds_for_exec for the execve
 	   checks and may_create for the file creation checks. The
 	   operation will then fail if the context is not permitted. */
 	tsec = selinux_cred(new);
@@ -6914,7 +6912,7 @@ static struct security_hook_list selinux_hooks[] __lsm_ro_after_init = {
 
 	LSM_HOOK_INIT(netlink_send, selinux_netlink_send),
 
-	LSM_HOOK_INIT(bprm_set_creds, selinux_bprm_set_creds),
+	LSM_HOOK_INIT(bprm_creds_for_exec, selinux_bprm_creds_for_exec),
 	LSM_HOOK_INIT(bprm_committing_creds, selinux_bprm_committing_creds),
 	LSM_HOOK_INIT(bprm_committed_creds, selinux_bprm_committed_creds),
 
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index 8c61d175e195..0ac8f4518d07 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -891,12 +891,12 @@ static int smack_sb_statfs(struct dentry *dentry)
  */
 
 /**
- * smack_bprm_set_creds - set creds for exec
+ * smack_bprm_creds_for_exec - Update bprm->cred if needed for exec
  * @bprm: the exec information
  *
  * Returns 0 if it gets a blob, -EPERM if exec forbidden and -ENOMEM otherwise
  */
-static int smack_bprm_set_creds(struct linux_binprm *bprm)
+static int smack_bprm_creds_for_exec(struct linux_binprm *bprm)
 {
 	struct inode *inode = file_inode(bprm->file);
 	struct task_smack *bsp = smack_cred(bprm->cred);
@@ -904,9 +904,6 @@ static int smack_bprm_set_creds(struct linux_binprm *bprm)
 	struct superblock_smack *sbsp;
 	int rc;
 
-	if (bprm->called_set_creds)
-		return 0;
-
 	isp = smack_inode(inode);
 	if (isp->smk_task == NULL || isp->smk_task == bsp->smk_task)
 		return 0;
@@ -4598,7 +4595,7 @@ static struct security_hook_list smack_hooks[] __lsm_ro_after_init = {
 	LSM_HOOK_INIT(sb_statfs, smack_sb_statfs),
 	LSM_HOOK_INIT(sb_set_mnt_opts, smack_set_mnt_opts),
 
-	LSM_HOOK_INIT(bprm_set_creds, smack_bprm_set_creds),
+	LSM_HOOK_INIT(bprm_creds_for_exec, smack_bprm_creds_for_exec),
 
 	LSM_HOOK_INIT(inode_alloc_security, smack_inode_alloc_security),
 	LSM_HOOK_INIT(inode_init_security, smack_inode_init_security),
diff --git a/security/tomoyo/tomoyo.c b/security/tomoyo/tomoyo.c
index 716c92ec941a..f9adddc42ac8 100644
--- a/security/tomoyo/tomoyo.c
+++ b/security/tomoyo/tomoyo.c
@@ -63,20 +63,14 @@ static void tomoyo_bprm_committed_creds(struct linux_binprm *bprm)
 
 #ifndef CONFIG_SECURITY_TOMOYO_OMIT_USERSPACE_LOADER
 /**
- * tomoyo_bprm_set_creds - Target for security_bprm_set_creds().
+ * tomoyo_bprm_for_exec - Target for security_bprm_creds_for_exec().
  *
  * @bprm: Pointer to "struct linux_binprm".
  *
  * Returns 0.
  */
-static int tomoyo_bprm_set_creds(struct linux_binprm *bprm)
+static int tomoyo_bprm_creds_for_exec(struct linux_binprm *bprm)
 {
-	/*
-	 * Do only if this function is called for the first time of an execve
-	 * operation.
-	 */
-	if (bprm->called_set_creds)
-		return 0;
 	/*
 	 * Load policy if /sbin/tomoyo-init exists and /sbin/init is requested
 	 * for the first time.
@@ -539,7 +533,7 @@ static struct security_hook_list tomoyo_hooks[] __lsm_ro_after_init = {
 	LSM_HOOK_INIT(task_alloc, tomoyo_task_alloc),
 	LSM_HOOK_INIT(task_free, tomoyo_task_free),
 #ifndef CONFIG_SECURITY_TOMOYO_OMIT_USERSPACE_LOADER
-	LSM_HOOK_INIT(bprm_set_creds, tomoyo_bprm_set_creds),
+	LSM_HOOK_INIT(bprm_creds_for_exec, tomoyo_bprm_creds_for_exec),
 #endif
 	LSM_HOOK_INIT(bprm_check_security, tomoyo_bprm_check_security),
 	LSM_HOOK_INIT(file_fcntl, tomoyo_file_fcntl),
-- 
2.25.0


  parent reply index

Thread overview: 149+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-05 19:39 exec: Promised cleanups after introducing exec_update_mutex Eric W. Biederman
2020-05-05 19:41 ` [PATCH 1/7] binfmt: Move install_exec_creds after setup_new_exec to match binfmt_elf Eric W. Biederman
2020-05-05 20:45   ` Kees Cook
2020-05-06 12:42   ` Greg Ungerer
2020-05-06 12:56     ` Eric W. Biederman
2020-05-05 19:41 ` [PATCH 2/7] exec: Make unlocking exec_update_mutex explict Eric W. Biederman
2020-05-05 20:46   ` Kees Cook
2020-05-05 19:42 ` [PATCH 3/7] exec: Rename the flag called_exec_mmap point_of_no_return Eric W. Biederman
2020-05-05 20:49   ` Kees Cook
2020-05-05 19:43 ` [PATCH 4/7] exec: Merge install_exec_creds into setup_new_exec Eric W. Biederman
2020-05-05 20:50   ` Kees Cook
2020-05-05 19:44 ` [PATCH 5/7] exec: In setup_new_exec cache current in the local variable me Eric W. Biederman
2020-05-05 20:51   ` Kees Cook
2020-05-05 19:45 ` [PATCH 6/7] exec: Move most of setup_new_exec into flush_old_exec Eric W. Biederman
2020-05-05 21:29   ` Kees Cook
2020-05-06 14:57     ` Eric W. Biederman
2020-05-06 15:30       ` Kees Cook
2020-05-07 19:51         ` Eric W. Biederman
2020-05-07 21:51     ` Eric W. Biederman
2020-05-08  5:50       ` Kees Cook
2020-05-05 19:46 ` [PATCH 7/7] exec: Rename flush_old_exec begin_new_exec Eric W. Biederman
2020-05-05 21:30   ` Kees Cook
2020-05-06 12:41 ` exec: Promised cleanups after introducing exec_update_mutex Greg Ungerer
2020-05-08 18:43 ` [PATCH 0/6] exec: Trivial cleanups for exec Eric W. Biederman
2020-05-08 18:44   ` [PATCH 1/6] exec: Move the comment from above de_thread to above unshare_sighand Eric W. Biederman
2020-05-09  5:02     ` Kees Cook
2020-05-08 18:44   ` [PATCH 2/6] exec: Fix spelling of search_binary_handler in a comment Eric W. Biederman
2020-05-09  5:03     ` Kees Cook
2020-05-08 18:45   ` [PATCH 3/6] exec: Stop open coding mutex_lock_killable of cred_guard_mutex Eric W. Biederman
2020-05-09  5:08     ` Kees Cook
2020-05-09 19:18     ` Linus Torvalds
2020-05-09 19:57       ` Eric W. Biederman
2020-05-10 20:33       ` Kees Cook
2020-05-08 18:45   ` [PATCH 4/6] exec: Run sync_mm_rss before taking exec_update_mutex Eric W. Biederman
2020-05-09  5:15     ` Kees Cook
2020-05-09 14:17       ` Eric W. Biederman
2020-05-08 18:47   ` [PATCH 5/6] exec: Move handling of the point of no return to the top level Eric W. Biederman
2020-05-09  5:31     ` Kees Cook
2020-05-09 13:39       ` Eric W. Biederman
2020-05-08 18:48   ` [PATCH 6/6] exec: Set the point of no return sooner Eric W. Biederman
2020-05-09  5:33     ` Kees Cook
2020-05-09 19:40   ` [PATCH 0/5] exec: Control flow simplifications Eric W. Biederman
2020-05-09 19:40     ` [PATCH 1/5] exec: Call cap_bprm_set_creds directly from prepare_binprm Eric W. Biederman
2020-05-09 20:04       ` Linus Torvalds
2020-05-09 19:41     ` [PATCH 2/5] exec: Directly call security_bprm_set_creds from __do_execve_file Eric W. Biederman
2020-05-09 20:07       ` Linus Torvalds
2020-05-09 20:12         ` Eric W. Biederman
2020-05-09 20:19           ` Linus Torvalds
2020-05-11  3:15       ` Kees Cook
2020-05-11 16:52         ` Eric W. Biederman
2020-05-11 21:18           ` Kees Cook
2020-05-09 19:41     ` [PATCH 3/5] exec: Remove recursion from search_binary_handler Eric W. Biederman
2020-05-09 20:16       ` Linus Torvalds
2020-05-10  4:22       ` Tetsuo Handa
2020-05-10 19:38         ` Linus Torvalds
2020-05-11 14:33           ` Eric W. Biederman
2020-05-11 19:10             ` Rob Landley
2020-05-13 21:59               ` Eric W. Biederman
2020-05-14 18:46                 ` Rob Landley
2020-05-11 21:55             ` Kees Cook
2020-05-12 18:42               ` Eric W. Biederman
2020-05-12 19:25                 ` Kees Cook
2020-05-12 20:31                   ` Eric W. Biederman
2020-05-12 23:08                     ` Kees Cook
2020-05-12 23:47                       ` Kees Cook
2020-05-12 23:51                         ` Kees Cook
2020-05-14 14:56                           ` Eric W. Biederman
2020-05-14 16:56                             ` Casey Schaufler
2020-05-14 17:02                               ` Eric W. Biederman
2020-05-13  0:20                 ` Linus Torvalds
2020-05-13  2:39                   ` Rob Landley
2020-05-13 19:51                     ` Linus Torvalds
2020-05-14 16:49                   ` Eric W. Biederman
2020-05-09 19:42     ` [PATCH 4/5] exec: Allow load_misc_binary to call prepare_binfmt unconditionally Eric W. Biederman
2020-05-11 22:09       ` Kees Cook
2020-05-09 19:42     ` [PATCH 5/5] exec: Move the call of prepare_binprm into search_binary_handler Eric W. Biederman
2020-05-11 22:24       ` Kees Cook
2020-05-19  0:29     ` [PATCH v2 0/8] exec: Control flow simplifications Eric W. Biederman
2020-05-19  0:29       ` [PATCH v2 1/8] exec: Teach prepare_exec_creds how exec treats uids & gids Eric W. Biederman
2020-05-19 18:03         ` Kees Cook
2020-05-19 18:28           ` Linus Torvalds
2020-05-19 18:57             ` Eric W. Biederman
2020-05-19  0:30       ` Eric W. Biederman [this message]
2020-05-19 15:34         ` [PATCH v2 2/8] exec: Factor security_bprm_creds_for_exec out of security_bprm_set_creds Casey Schaufler
2020-05-19 18:10         ` Kees Cook
2020-05-19 21:28           ` James Morris
2020-05-19  0:31       ` [PATCH v2 3/8] exec: Convert security_bprm_set_creds into security_bprm_repopulate_creds Eric W. Biederman
2020-05-19 18:21         ` Kees Cook
2020-05-19 19:03           ` Eric W. Biederman
2020-05-19 19:14             ` Kees Cook
2020-05-20 20:22               ` Eric W. Biederman
2020-05-20 20:53                 ` Kees Cook
2020-05-19 21:52         ` James Morris
2020-05-20 12:40           ` Eric W. Biederman
2020-05-19  0:31       ` [PATCH v2 4/8] exec: Allow load_misc_binary to call prepare_binfmt unconditionally Eric W. Biederman
2020-05-19 18:27         ` Kees Cook
2020-05-19 19:08           ` Eric W. Biederman
2020-05-19 19:17             ` Kees Cook
2020-05-19  0:32       ` [PATCH v2 5/8] exec: Move the call of prepare_binprm into search_binary_handler Eric W. Biederman
2020-05-19 18:27         ` Kees Cook
2020-05-19 21:30         ` James Morris
2020-05-19  0:33       ` [PATCH v2 6/8] exec/binfmt_script: Don't modify bprm->buf and then return -ENOEXEC Eric W. Biederman
2020-05-19 19:08         ` Kees Cook
2020-05-19 19:19           ` Eric W. Biederman
2020-05-19  0:33       ` [PATCH v2 7/8] exec: Generic execfd support Eric W. Biederman
2020-05-19 19:46         ` Kees Cook
2020-05-19 19:54           ` Linus Torvalds
2020-05-19 20:20             ` Eric W. Biederman
2020-05-19 21:59         ` Rob Landley
2020-05-20 16:05           ` Eric W. Biederman
2020-05-21 22:50             ` Rob Landley
2020-05-22  3:28               ` Eric W. Biederman
2020-05-22  4:51                 ` Rob Landley
2020-05-22 13:35                   ` Eric W. Biederman
2020-05-19  0:34       ` [PATCH v2 8/8] exec: Remove recursion from search_binary_handler Eric W. Biederman
2020-05-19 20:37         ` Kees Cook
2020-05-19  1:25       ` [PATCH v2 0/8] exec: Control flow simplifications Linus Torvalds
2020-05-19 21:55       ` Kees Cook
2020-05-20 13:02         ` Eric W. Biederman
2020-05-20 22:12       ` Eric W. Biederman
2020-05-20 23:43         ` Kees Cook
2020-05-21 11:53           ` Eric W. Biederman
2020-05-28 15:38       ` [PATCH 0/11] exec: cred calculation simplifications Eric W. Biederman
2020-05-28 15:41         ` [PATCH 01/11] exec: Reduce bprm->per_clear to a single bit Eric W. Biederman
2020-05-28 19:04           ` Linus Torvalds
2020-05-28 19:17             ` Eric W. Biederman
2020-05-28 15:42         ` [PATCH 02/11] exec: Introduce active_per_clear the per file version of per_clear Eric W. Biederman
2020-05-28 19:05           ` Linus Torvalds
2020-05-28 15:42         ` [PATCH 03/11] exec: Compute file based creds only once Eric W. Biederman
2020-05-28 15:43         ` [PATCH 04/11] exec: Move uid/gid handling from creds_from_file into bprm_fill_uid Eric W. Biederman
2020-05-28 15:44         ` Eric W. Biederman
2020-05-28 15:44         ` [PATCH 05/11] exec: In bprm_fill_uid use CAP_SETGID to see if a gid change is safe Eric W. Biederman
2020-05-28 15:48         ` [PATCH 06/11] exec: Don't set secureexec when the uid or gid changes are abandoned Eric W. Biederman
2020-05-28 15:48         ` [PATCH 07/11] exec: Set saved, fs, and effective ids together in bprm_fill_uid Eric W. Biederman
2020-05-28 15:49         ` [PATCH 08/11] exec: In bprm_fill_uid remove unnecessary no new privs check Eric W. Biederman
2020-05-28 15:49         ` [PATCH 09/11] exec: In bprm_fill_uid only set per_clear when honoring suid or sgid Eric W. Biederman
2020-05-28 19:08           ` Linus Torvalds
2020-05-28 19:21             ` Eric W. Biederman
2020-05-28 15:50         ` [PATCH 10/11] exec: In bprm_fill_uid set secureexec at same time as per_clear Eric W. Biederman
2020-05-28 15:50         ` [PATCH 11/11] exec: Remove the label after_setid from bprm_fill_uid Eric W. Biederman
2020-05-29 16:45         ` [PATCH 0/2] exec: Remove the computation of bprm->cred Eric W. Biederman
2020-05-29 16:46           ` [PATCH 1/2] exec: Add a per bprm->file version of per_clear Eric W. Biederman
2020-05-29 21:06             ` Kees Cook
2020-05-30  3:23               ` Eric W. Biederman
2020-05-30  5:14                 ` Kees Cook
2020-05-29 16:47           ` [PATCH 2/2] exec: Compute file based creds only once Eric W. Biederman
2020-05-29 21:24             ` Kees Cook
2020-05-30  3:28               ` Eric W. Biederman
2020-05-30  5:18                 ` Kees Cook

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