[PATCH 3/3] Audit: remove the limit on execve arguments when auditis running

[Eric Paris]

    Remove the limitation on argv size.  The audit system now logs arguments in
    smaller chunks (currently about 8k due to userspace audit system buffer sizes)
    so this is no longer a requirement.

Signed-off-by: Eric Paris <eparis@xxxxxxxxxx>
Acked-by: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>

---

This patch hasn't changed since the last series, just reposted as 3/3 and rediffed.

 kernel/auditsc.c |   10 ----------
 kernel/sysctl.c  |   11 -----------
 2 files changed, 0 insertions(+), 21 deletions(-)

diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index ffc8d4b..5d39727 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -1917,8 +1917,6 @@ int __audit_ipc_set_perm(unsigned long qbytes, uid_t uid, gid_t gid, mode_t mode
 	return 0;
 }
 
-int audit_argv_kb = 32;
-
 int audit_bprm(struct linux_binprm *bprm)
 {
 	struct audit_aux_data_execve *ax;
@@ -1927,14 +1925,6 @@ int audit_bprm(struct linux_binprm *bprm)
 	if (likely(!audit_enabled || !context || context->dummy))
 		return 0;
 
-	/*
-	 * Even though the stack code doesn't limit the arg+env size any more,
-	 * the audit code requires that _all_ arguments be logged in a single
-	 * netlink skb. Hence cap it :-(
-	 */
-	if (bprm->argv_len > (audit_argv_kb << 10))
-		return -E2BIG;
-
 	ax = kmalloc(sizeof(*ax), GFP_KERNEL);
 	if (!ax)
 		return -ENOMEM;
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 53a456e..88e5d06 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -77,7 +77,6 @@ extern int percpu_pagelist_fraction;
 extern int compat_log;
 extern int maps_protect;
 extern int sysctl_stat_interval;
-extern int audit_argv_kb;
 
 /* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */
 static int maxolduid = 65535;
@@ -347,16 +346,6 @@ static ctl_table kern_table[] = {
 		.mode		= 0644,
 		.proc_handler	= &proc_dointvec,
 	},
-#ifdef CONFIG_AUDITSYSCALL
-	{
-		.ctl_name	= CTL_UNNUMBERED,
-		.procname	= "audit_argv_kb",
-		.data		= &audit_argv_kb,
-		.maxlen		= sizeof(int),
-		.mode		= 0644,
-		.proc_handler	= &proc_dointvec,
-	},
-#endif
 	{
 		.ctl_name	= KERN_CORE_PATTERN,
 		.procname	= "core_pattern",


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