Revision e8e2bca070b4606a0d7c4ea837bb92370e690a38 authored by Alexander Potapenko on 09 January 2020, 14:16:30 UTC, committed by Alexander Potapenko on 09 January 2020, 14:16:30 UTC
KMSAN doesn't allow treating adjacent memory pages as such, if they were allocated by different alloc_pages() calls. The block layer however does so: adjacent pages end up being used together. To prevent this, make page_is_mergeable() return false under KMSAN. Suggested-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Alexander Potapenko <glider@google.com> Cc: Eric Biggers <ebiggers@google.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Vegard Nossum <vegard.nossum@oracle.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Marco Elver <elver@google.com> Cc: Andrey Konovalov <andreyknvl@google.com> Cc: linux-mm@kvack.org
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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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