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>
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| File | Mode | Size |
|---|---|---|
| 9p | ||
| adfs | ||
| affs | ||
| afs | ||
| autofs4 | ||
| befs | ||
| bfs | ||
| btrfs | ||
| cachefiles | ||
| ceph | ||
| cifs | ||
| coda | ||
| configfs | ||
| cramfs | ||
| debugfs | ||
| devpts | ||
| dlm | ||
| ecryptfs | ||
| efs | ||
| exofs | ||
| exportfs | ||
| ext2 | ||
| ext3 | ||
| ext4 | ||
| f2fs | ||
| fat | ||
| freevxfs | ||
| fscache | ||
| fuse | ||
| gfs2 | ||
| hfs | ||
| hfsplus | ||
| hostfs | ||
| hpfs | ||
| hppfs | ||
| hugetlbfs | ||
| isofs | ||
| jbd | ||
| jbd2 | ||
| jffs2 | ||
| jfs | ||
| lockd | ||
| logfs | ||
| minix | ||
| ncpfs | ||
| nfs | ||
| nfs_common | ||
| nfsd | ||
| nilfs2 | ||
| nls | ||
| notify | ||
| ntfs | ||
| ocfs2 | ||
| omfs | ||
| openpromfs | ||
| proc | ||
| pstore | ||
| qnx4 | ||
| qnx6 | ||
| quota | ||
| ramfs | ||
| reiserfs | ||
| romfs | ||
| squashfs | ||
| sysfs | ||
| sysv | ||
| ubifs | ||
| udf | ||
| ufs | ||
| xfs | ||
| Kconfig | -rw-r--r-- | 5.9 KB |
| Kconfig.binfmt | -rw-r--r-- | 6.7 KB |
| Makefile | -rw-r--r-- | 4.1 KB |
| aio.c | -rw-r--r-- | 45.7 KB |
| anon_inodes.c | -rw-r--r-- | 6.4 KB |
| attr.c | -rw-r--r-- | 7.0 KB |
| bad_inode.c | -rw-r--r-- | 7.7 KB |
| binfmt_aout.c | -rw-r--r-- | 11.7 KB |
| binfmt_elf.c | -rw-r--r-- | 57.8 KB |
| binfmt_elf_fdpic.c | -rw-r--r-- | 48.6 KB |
| binfmt_em86.c | -rw-r--r-- | 2.7 KB |
| binfmt_flat.c | -rw-r--r-- | 26.7 KB |
| binfmt_misc.c | -rw-r--r-- | 15.0 KB |
| binfmt_script.c | -rw-r--r-- | 2.7 KB |
| binfmt_som.c | -rw-r--r-- | 7.1 KB |
| bio-integrity.c | -rw-r--r-- | 20.5 KB |
| bio.c | -rw-r--r-- | 40.3 KB |
| block_dev.c | -rw-r--r-- | 42.0 KB |
| buffer.c | -rw-r--r-- | 87.2 KB |
| char_dev.c | -rw-r--r-- | 14.0 KB |
| compat.c | -rw-r--r-- | 43.6 KB |
| compat_binfmt_elf.c | -rw-r--r-- | 3.6 KB |
| compat_ioctl.c | -rw-r--r-- | 45.5 KB |
| coredump.c | -rw-r--r-- | 16.5 KB |
| coredump.h | -rw-r--r-- | 106 bytes |
| dcache.c | -rw-r--r-- | 78.5 KB |
| dcookies.c | -rw-r--r-- | 6.8 KB |
| direct-io.c | -rw-r--r-- | 37.4 KB |
| drop_caches.c | -rw-r--r-- | 1.5 KB |
| eventfd.c | -rw-r--r-- | 11.3 KB |
| eventpoll.c | -rw-r--r-- | 54.7 KB |
| exec.c | -rw-r--r-- | 39.0 KB |
| fcntl.c | -rw-r--r-- | 16.3 KB |
| fhandle.c | -rw-r--r-- | 6.5 KB |
| fifo.c | -rw-r--r-- | 3.2 KB |
| file.c | -rw-r--r-- | 23.4 KB |
| file_table.c | -rw-r--r-- | 12.4 KB |
| filesystems.c | -rw-r--r-- | 6.4 KB |
| fs-writeback.c | -rw-r--r-- | 39.6 KB |
| fs_struct.c | -rw-r--r-- | 3.3 KB |
| generic_acl.c | -rw-r--r-- | 3.9 KB |
| inode.c | -rw-r--r-- | 48.5 KB |
| internal.h | -rw-r--r-- | 3.0 KB |
| ioctl.c | -rw-r--r-- | 15.5 KB |
| ioprio.c | -rw-r--r-- | 5.0 KB |
| libfs.c | -rw-r--r-- | 25.7 KB |
| locks.c | -rw-r--r-- | 58.6 KB |
| mbcache.c | -rw-r--r-- | 16.4 KB |
| mount.h | -rw-r--r-- | 2.3 KB |
| mpage.c | -rw-r--r-- | 20.0 KB |
| namei.c | -rw-r--r-- | 99.8 KB |
| namespace.c | -rw-r--r-- | 67.6 KB |
| no-block.c | -rw-r--r-- | 688 bytes |
| open.c | -rw-r--r-- | 25.6 KB |
| pipe.c | -rw-r--r-- | 28.8 KB |
| pnode.c | -rw-r--r-- | 8.8 KB |
| pnode.h | -rw-r--r-- | 1.5 KB |
| posix_acl.c | -rw-r--r-- | 9.2 KB |
| proc_namespace.c | -rw-r--r-- | 7.5 KB |
| read_write.c | -rw-r--r-- | 21.8 KB |
| read_write.h | -rw-r--r-- | 632 bytes |
| readdir.c | -rw-r--r-- | 6.8 KB |
| select.c | -rw-r--r-- | 24.0 KB |
| seq_file.c | -rw-r--r-- | 19.6 KB |
| signalfd.c | -rw-r--r-- | 8.3 KB |
| splice.c | -rw-r--r-- | 46.3 KB |
| stack.c | -rw-r--r-- | 2.5 KB |
| stat.c | -rw-r--r-- | 11.3 KB |
| statfs.c | -rw-r--r-- | 5.3 KB |
| super.c | -rw-r--r-- | 34.6 KB |
| sync.c | -rw-r--r-- | 10.6 KB |
| timerfd.c | -rw-r--r-- | 9.6 KB |
| utimes.c | -rw-r--r-- | 5.7 KB |
| xattr.c | -rw-r--r-- | 23.5 KB |
| xattr_acl.c | -rw-r--r-- | 4.3 KB |
Computing file changes ...
