Revision c300aa64ddf57d9c5d9c898a64b36877345dd4a9 authored by Andy Honig on 11 March 2013, 16:34:52 UTC, committed by Marcelo Tosatti on 19 March 2013, 17:17:31 UTC
If the guest sets the GPA of the time_page so that the request to update the time straddles a page then KVM will write onto an incorrect page. The write is done byusing kmap atomic to get a pointer to the page for the time structure and then performing a memcpy to that page starting at an offset that the guest controls. Well behaved guests always provide a 32-byte aligned address, however a malicious guest could use this to corrupt host kernel memory. Tested: Tested against kvmclock unit test. Signed-off-by: Andrew Honig <ahonig@google.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
1 parent c09664b
export.h
#ifndef NILFS_EXPORT_H
#define NILFS_EXPORT_H
#include <linux/exportfs.h>
extern const struct export_operations nilfs_export_ops;
/**
* struct nilfs_fid - NILFS file id type
* @cno: checkpoint number
* @ino: inode number
* @gen: file generation (version) for NFS
* @parent_gen: parent generation (version) for NFS
* @parent_ino: parent inode number
*/
struct nilfs_fid {
u64 cno;
u64 ino;
u32 gen;
u32 parent_gen;
u64 parent_ino;
} __attribute__ ((packed));
#endif
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