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Revision 21a446cf186570168b7281b154b1993968598aca authored by Trond Myklebust on 05 November 2018, 16:10:50 UTC, committed by Trond Myklebust on 12 November 2018, 21:39:13 UTC 
NFSv4: Don't exit the state manager without clearing NFS4CLNT_MANAGER_RUNNING
 
If we exit the NFSv4 state manager due to a umount, then we can end up
leaving the NFS4CLNT_MANAGER_RUNNING flag set. If another mount causes
the nfs4_client to be rereferenced before it is destroyed, then we end
up never being able to recover state.

Fixes: 47c2199b6eb5 ("NFSv4.1: Ensure state manager thread dies on last ...")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Cc: stable@vger.kernel.org # v4.15+
1 parent ccda4af
Raw File
exec_domain.c 
// SPDX-License-Identifier: GPL-2.0
/*
 * Handling of different ABIs (personalities).
 *
 * We group personalities into execution domains which have their
 * own handlers for kernel entry points, signal mapping, etc...
 *
 * 2001-05-06	Complete rewrite,  Christoph Hellwig (hch@infradead.org)
 */

#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/kmod.h>
#include <linux/module.h>
#include <linux/personality.h>
#include <linux/proc_fs.h>
#include <linux/sched.h>
#include <linux/seq_file.h>
#include <linux/syscalls.h>
#include <linux/sysctl.h>
#include <linux/types.h>

#ifdef CONFIG_PROC_FS
static int execdomains_proc_show(struct seq_file *m, void *v)
{
	seq_puts(m, "0-0\tLinux           \t[kernel]\n");
	return 0;
}

static int __init proc_execdomains_init(void)
{
	proc_create_single("execdomains", 0, NULL, execdomains_proc_show);
	return 0;
}
module_init(proc_execdomains_init);
#endif

SYSCALL_DEFINE1(personality, unsigned int, personality)
{
	unsigned int old = current->personality;

	if (personality != 0xffffffff)
		set_personality(personality);

	return old;
}
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