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authorStanislaw Gruszka <sgruszka@redhat.com>2011-12-06 03:08:34 -0500
committerIngo Molnar <mingo@elte.hu>2011-12-06 03:23:53 -0500
commit855c743a27bb58a9a521bdc485ef5acfdb69badc (patch)
tree0b53ae9a389f64a6f4c10492786d45d0453c6c25 /tools/perf/scripts/python/syscall-counts.py
parent706d9a9c8b5758390036b9980a2b12d809599777 (diff)
x86/mm: Initialize high mem before free_all_bootmem()
Patch fixes a boot crash with pagealloc debugging enabled: Initializing HighMem for node 0 (000377fe:0003fff0) BUG: unable to handle kernel paging request at f6fefe80 IP: [<c1621ab5>] find_range_array+0x5e/0x69 [...] Call Trace: [<c1622064>] __get_free_all_memory_range+0x39/0xb4 [<c1620dd0>] add_highpages_with_active_regions+0x18/0x9b [<c1621a2e>] set_highmem_pages_init+0x70/0x90 [<c162122b>] mem_init+0x50/0x21b [<c16155bd>] start_kernel+0x1bf/0x31c [<c1615065>] i386_start_kernel+0x65/0x67 The crash happens when memblock wants to allocate big area for temporary "struct range" array and reuses pages from top of low memory, which were already passed to the buddy allocator. Reported-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com> Cc: linux-mm@kvack.org Cc: Mel Gorman <mgorman@suse.de> Link: http://lkml.kernel.org/r/20111206080833.GB3105@redhat.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'tools/perf/scripts/python/syscall-counts.py')
0 files changed, 0 insertions, 0 deletions
generated by cgit v1.2.2 (git 2.25.0) at 2026-07-01 00:59:58 -0400
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/*
 * Copyright (c) 2004-2005 Silicon Graphics, Inc.
 * All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it would be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write the Free Software Foundation,
 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
#include <linux/config.h>
#include <linux/compat.h>
#include <linux/init.h>
#include <linux/ioctl.h>
#include <linux/ioctl32.h>
#include <linux/syscalls.h>
#include <linux/types.h>
#include <linux/fs.h>
#include <asm/uaccess.h>
#include "xfs.h"
#include "xfs_types.h"
#include "xfs_fs.h"
#include "xfs_vfs.h"
#include "xfs_vnode.h"
#include "xfs_dfrag.h"

#define  _NATIVE_IOC(cmd, type) \
	  _IOC(_IOC_DIR(cmd), _IOC_TYPE(cmd), _IOC_NR(cmd), sizeof(type))

#if defined(CONFIG_IA64) || defined(CONFIG_X86_64)
#define BROKEN_X86_ALIGNMENT
/* on ia32 l_start is on a 32-bit boundary */
typedef struct xfs_flock64_32 {
	__s16		l_type;
	__s16		l_whence;
	__s64		l_start	__attribute__((packed));
			/* len == 0 means until end of file */
	__s64		l_len __attribute__((packed));
	__s32		l_sysid;
	__u32		l_pid;
	__s32		l_pad[4];	/* reserve area */
} xfs_flock64_32_t;

#define XFS_IOC_ALLOCSP_32	_IOW ('X', 10, struct xfs_flock64_32)
#define XFS_IOC_FREESP_32	_IOW ('X', 11, struct xfs_flock64_32)
#define XFS_IOC_ALLOCSP64_32	_IOW ('X', 36, struct xfs_flock64_32)
#define XFS_IOC_FREESP64_32	_IOW ('X', 37, struct xfs_flock64_32)
#define XFS_IOC_RESVSP_32	_IOW ('X', 40, struct xfs_flock64_32)
#define XFS_IOC_UNRESVSP_32	_IOW ('X', 41, struct xfs_flock64_32)
#define XFS_IOC_RESVSP64_32	_IOW ('X', 42, struct xfs_flock64_32)
#define XFS_IOC_UNRESVSP64_32	_IOW ('X', 43, struct xfs_flock64_32)

/* just account for different alignment */
STATIC unsigned long
xfs_ioctl32_flock(
	unsigned long		arg)
{
	xfs_flock64_32_t	__user *p32 = (void __user *)arg;
	xfs_flock64_t		__user *p = compat_alloc_user_space(sizeof(*p));

	if (copy_in_user(&p->l_type,	&p32->l_type,	sizeof(s16)) ||
	    copy_in_user(&p->l_whence,	&p32->l_whence, sizeof(s16)) ||
	    copy_in_user(&p->l_start,	&p32->l_start,	sizeof(s64)) ||
	    copy_in_user(&p->l_len,	&p32->l_len,	sizeof(s64)) ||
	    copy_in_user(&p->l_sysid,	&p32->l_sysid,	sizeof(s32)) ||
	    copy_in_user(&p->l_pid,	&p32->l_pid,	sizeof(u32)) ||
	    copy_in_user(&p->l_pad,	&p32->l_pad,	4*sizeof(u32)))
		return -EFAULT;
	
	return (unsigned long)p;
}

#else

typedef struct xfs_fsop_bulkreq32 {
	compat_uptr_t	lastip;		/* last inode # pointer		*/
	__s32		icount;		/* count of entries in buffer	*/
	compat_uptr_t	ubuffer;	/* user buffer for inode desc.	*/
	__s32		ocount;		/* output count pointer		*/
} xfs_fsop_bulkreq32_t;

STATIC unsigned long
xfs_ioctl32_bulkstat(
	unsigned long		arg)
{
	xfs_fsop_bulkreq32_t	__user *p32 = (void __user *)arg;
	xfs_fsop_bulkreq_t	__user *p = compat_alloc_user_space(sizeof(*p));
	u32			addr;

	if (get_user(addr, &p32->lastip) ||
	    put_user(compat_ptr(addr), &p->lastip) ||
	    copy_in_user(&p->icount, &p32->icount, sizeof(s32)) ||
	    get_user(addr, &p32->ubuffer) ||
	    put_user(compat_ptr(addr), &p->ubuffer) ||
	    get_user(addr, &p32->ocount) ||
	    put_user(compat_ptr(addr), &p->ocount))
		return -EFAULT;

	return (unsigned long)p;
}
#endif

STATIC long
__linvfs_compat_ioctl(int mode, struct file *f, unsigned cmd, unsigned long arg)
{
	int		error;
	struct		inode *inode = f->f_dentry->d_inode;
	vnode_t		*vp = LINVFS_GET_VP(inode);

	switch (cmd) {
	case XFS_IOC_DIOINFO:
	case XFS_IOC_FSGEOMETRY_V1:
	case XFS_IOC_FSGEOMETRY:
	case XFS_IOC_GETVERSION:
	case XFS_IOC_GETXFLAGS:
	case XFS_IOC_SETXFLAGS:
	case XFS_IOC_FSGETXATTR:
	case XFS_IOC_FSSETXATTR:
	case XFS_IOC_FSGETXATTRA:
	case XFS_IOC_FSSETDM:
	case XFS_IOC_GETBMAP:
	case XFS_IOC_GETBMAPA:
	case XFS_IOC_GETBMAPX:
/* not handled
	case XFS_IOC_FD_TO_HANDLE:
	case XFS_IOC_PATH_TO_HANDLE:
	case XFS_IOC_PATH_TO_FSHANDLE:
	case XFS_IOC_OPEN_BY_HANDLE:
	case XFS_IOC_FSSETDM_BY_HANDLE:
	case XFS_IOC_READLINK_BY_HANDLE:
	case XFS_IOC_ATTRLIST_BY_HANDLE:
	case XFS_IOC_ATTRMULTI_BY_HANDLE:
*/
	case XFS_IOC_FSCOUNTS:
	case XFS_IOC_SET_RESBLKS:
	case XFS_IOC_GET_RESBLKS:
	case XFS_IOC_FSGROWFSDATA:
	case XFS_IOC_FSGROWFSLOG:
	case XFS_IOC_FSGROWFSRT:
	case XFS_IOC_FREEZE:
	case XFS_IOC_THAW:
	case XFS_IOC_GOINGDOWN:
	case XFS_IOC_ERROR_INJECTION:
	case XFS_IOC_ERROR_CLEARALL:
		break;

#ifdef BROKEN_X86_ALIGNMENT
	/* xfs_flock_t has wrong u32 vs u64 alignment */
	case XFS_IOC_ALLOCSP_32:
	case XFS_IOC_FREESP_32:
	case XFS_IOC_ALLOCSP64_32:
	case XFS_IOC_FREESP64_32:
	case XFS_IOC_RESVSP_32:
	case XFS_IOC_UNRESVSP_32:
	case XFS_IOC_RESVSP64_32:
	case XFS_IOC_UNRESVSP64_32:
		arg = xfs_ioctl32_flock(arg);
		cmd = _NATIVE_IOC(cmd, struct xfs_flock64);
		break;

#else /* These are handled fine if no alignment issues */
	case XFS_IOC_ALLOCSP:
	case XFS_IOC_FREESP:
	case XFS_IOC_RESVSP:
	case XFS_IOC_UNRESVSP:
	case XFS_IOC_ALLOCSP64:
	case XFS_IOC_FREESP64:
	case XFS_IOC_RESVSP64:
	case XFS_IOC_UNRESVSP64:
		break;

	/* xfs_bstat_t still has wrong u32 vs u64 alignment */
	case XFS_IOC_SWAPEXT:
		break;

	case XFS_IOC_FSBULKSTAT_SINGLE:
	case XFS_IOC_FSBULKSTAT:
	case XFS_IOC_FSINUMBERS:
		arg = xfs_ioctl32_bulkstat(arg);
		break;
#endif
	default:
		return -ENOIOCTLCMD;
	}

	VOP_IOCTL(vp, inode, f, mode, cmd, (void __user *)arg, error);
	VMODIFY(vp);

	return error;
}

long
linvfs_compat_ioctl(
	struct file		*f,
	unsigned		cmd,
	unsigned long		arg)
{
	return __linvfs_compat_ioctl(0, f, cmd, arg);
}

long
linvfs_compat_invis_ioctl(
	struct file		*f,
	unsigned		cmd,
	unsigned long		arg)
{
	return __linvfs_compat_ioctl(IO_INVIS, f, cmd, arg);
}
generated by cgit v1.2.2 (git 2.25.0) at 2026-07-01 00:59:58 -0400