From f0bc21b268c1464603192a00851cdbbf7c2cdc36 Mon Sep 17 00:00:00 2001
From: Xiaoming Ni <nixiaoming@huawei.com>
Date: Fri, 21 Jan 2022 22:13:38 -0800
Subject: fs/coredump: move coredump sysctls into its own file

This moves the fs/coredump.c respective sysctls to its own file.

Link: https://lkml.kernel.org/r/20211129211943.640266-6-mcgrof@kernel.org
Signed-off-by: Xiaoming Ni <nixiaoming@huawei.com>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
Cc: Antti Palosaari <crope@iki.fi>
Cc: Christian Brauner <christian.brauner@ubuntu.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Eric Biederman <ebiederm@xmission.com>
Cc: Eric Biggers <ebiggers@google.com>
Cc: Iurii Zaikin <yzaikin@google.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Lukas Middendorf <kernel@tuxforce.de>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: "Naveen N. Rao" <naveen.n.rao@linux.ibm.com>
Cc: Stephen Kitt <steve@sk2.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 fs/exec.c | 55 -------------------------------------------------------
 1 file changed, 55 deletions(-)

(limited to 'fs/exec.c')

diff --git a/fs/exec.c b/fs/exec.c
index 310750340e4a..79f2c9483302 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -2103,20 +2103,6 @@ COMPAT_SYSCALL_DEFINE5(execveat, int, fd,
 
 #ifdef CONFIG_SYSCTL
 
-static void validate_coredump_safety(void)
-{
-#ifdef CONFIG_COREDUMP
-	if (suid_dumpable == SUID_DUMP_ROOT &&
-	    core_pattern[0] != '/' && core_pattern[0] != '|') {
-		pr_warn(
-"Unsafe core_pattern used with fs.suid_dumpable=2.\n"
-"Pipe handler or fully qualified core dump path required.\n"
-"Set kernel.core_pattern before fs.suid_dumpable.\n"
-		);
-	}
-#endif
-}
-
 static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write,
 		void *buffer, size_t *lenp, loff_t *ppos)
 {
@@ -2140,50 +2126,9 @@ static struct ctl_table fs_exec_sysctls[] = {
 	{ }
 };
 
-#ifdef CONFIG_COREDUMP
-
-static int proc_dostring_coredump(struct ctl_table *table, int write,
-		  void *buffer, size_t *lenp, loff_t *ppos)
-{
-	int error = proc_dostring(table, write, buffer, lenp, ppos);
-
-	if (!error)
-		validate_coredump_safety();
-	return error;
-}
-
-static struct ctl_table kernel_exec_sysctls[] = {
-	{
-		.procname	= "core_uses_pid",
-		.data		= &core_uses_pid,
-		.maxlen		= sizeof(int),
-		.mode		= 0644,
-		.proc_handler	= proc_dointvec,
-	},
-	{
-		.procname	= "core_pattern",
-		.data		= core_pattern,
-		.maxlen		= CORENAME_MAX_SIZE,
-		.mode		= 0644,
-		.proc_handler	= proc_dostring_coredump,
-	},
-	{
-		.procname	= "core_pipe_limit",
-		.data		= &core_pipe_limit,
-		.maxlen		= sizeof(unsigned int),
-		.mode		= 0644,
-		.proc_handler	= proc_dointvec,
-	},
-	{ }
-};
-#endif
-
 static int __init init_fs_exec_sysctls(void)
 {
 	register_sysctl_init("fs", fs_exec_sysctls);
-#ifdef CONFIG_COREDUMP
-	register_sysctl_init("kernel", kernel_exec_sysctls);
-#endif
 	return 0;
 }
 
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