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Revision 64b4c411a6c7a5f27555bfc2d6310b87bde3db67 authored by Andrew Morton on 21 October 2022, 04:19:22 UTC, committed by Andrew Morton on 28 October 2022, 20:37:22 UTC 
ipc/msg.c: fix percpu_counter use after free
 
These percpu counters are referenced in free_ipcs->freeque, so destroy
them later.

Fixes: 72d1e611082e ("ipc/msg: mitigate the lock contention with percpu counter")
Reported-by: syzbot+96e659d35b9d6b541152@syzkaller.appspotmail.com
Tested-by: Mark Rutland <mark.rutland@arm.com>
Cc: Jiebin Sun <jiebin.sun@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
1 parent 27d676a
Raw File
mman.h 
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef _UAPI_LINUX_MMAN_H
#define _UAPI_LINUX_MMAN_H

#include <asm/mman.h>
#include <asm-generic/hugetlb_encode.h>

#define MREMAP_MAYMOVE		1
#define MREMAP_FIXED		2
#define MREMAP_DONTUNMAP	4

#define OVERCOMMIT_GUESS		0
#define OVERCOMMIT_ALWAYS		1
#define OVERCOMMIT_NEVER		2

#define MAP_SHARED	0x01		/* Share changes */
#define MAP_PRIVATE	0x02		/* Changes are private */
#define MAP_SHARED_VALIDATE 0x03	/* share + validate extension flags */

/*
 * Huge page size encoding when MAP_HUGETLB is specified, and a huge page
 * size other than the default is desired.  See hugetlb_encode.h.
 * All known huge page size encodings are provided here.  It is the
 * responsibility of the application to know which sizes are supported on
 * the running system.  See mmap(2) man page for details.
 */
#define MAP_HUGE_SHIFT	HUGETLB_FLAG_ENCODE_SHIFT
#define MAP_HUGE_MASK	HUGETLB_FLAG_ENCODE_MASK

#define MAP_HUGE_16KB	HUGETLB_FLAG_ENCODE_16KB
#define MAP_HUGE_64KB	HUGETLB_FLAG_ENCODE_64KB
#define MAP_HUGE_512KB	HUGETLB_FLAG_ENCODE_512KB
#define MAP_HUGE_1MB	HUGETLB_FLAG_ENCODE_1MB
#define MAP_HUGE_2MB	HUGETLB_FLAG_ENCODE_2MB
#define MAP_HUGE_8MB	HUGETLB_FLAG_ENCODE_8MB
#define MAP_HUGE_16MB	HUGETLB_FLAG_ENCODE_16MB
#define MAP_HUGE_32MB	HUGETLB_FLAG_ENCODE_32MB
#define MAP_HUGE_256MB	HUGETLB_FLAG_ENCODE_256MB
#define MAP_HUGE_512MB	HUGETLB_FLAG_ENCODE_512MB
#define MAP_HUGE_1GB	HUGETLB_FLAG_ENCODE_1GB
#define MAP_HUGE_2GB	HUGETLB_FLAG_ENCODE_2GB
#define MAP_HUGE_16GB	HUGETLB_FLAG_ENCODE_16GB

#endif /* _UAPI_LINUX_MMAN_H */
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