unimore/kernel-hacking-2024-linux-steffo
unimore/kernel-hacking-2024-linux-steffo
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kernel-hacking-2024-linux-s.../fs
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NeilBrown b41eeef14d knfsd: avoid Oops if buggy userspace performs confusing filehandle->dentry mapping 
When a lookup request arrives, nfsd uses information provided by userspace
(mountd) to find the right filesystem.

It then assumes that the same filehandle type as the incoming filehandle can
be used to create an outgoing filehandle.

However if mountd is buggy, or maybe just being creative, the filesystem may
not support that filesystem type, and the kernel could oops, particularly if
'ex_uuid' is NULL but a FSID_UUID* filehandle type is used.

So add some proper checking that the fsid version/type from the incoming
filehandle is actually supportable, and ignore that information if it isn't
supportable.

Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-09 12:30:54 -07:00
..
9p header cleaning: don't include smp_lock.h when not used 2007-05-08 11:15:07 -07:00
adfs slab allocators: Remove SLAB_DEBUG_INITIAL flag 2007-05-07 12:12:57 -07:00
affs slab allocators: Remove SLAB_DEBUG_INITIAL flag 2007-05-07 12:12:57 -07:00
afs AFS: implement basic file write support 2007-05-09 12:30:50 -07:00
autofs
autofs4 header cleaning: don't include smp_lock.h when not used 2007-05-08 11:15:07 -07:00
befs slab allocators: Remove SLAB_DEBUG_INITIAL flag 2007-05-07 12:12:57 -07:00
bfs slab allocators: Remove SLAB_DEBUG_INITIAL flag 2007-05-07 12:12:57 -07:00
cifs header cleaning: don't include smp_lock.h when not used 2007-05-08 11:15:07 -07:00
coda slab allocators: Remove SLAB_DEBUG_INITIAL flag 2007-05-07 12:12:57 -07:00
configfs use simple_read_from_buffer() in fs/ 2007-05-09 12:30:49 -07:00
cramfs mm: make read_cache_page synchronous 2007-05-07 12:12:51 -07:00
debugfs remove "struct subsystem" as it is no longer needed 2007-05-02 18:57:59 -07:00
devpts devpts: add fsnotify create event 2007-05-08 11:14:59 -07:00
dlm Merge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-nmw 2007-05-07 12:26:27 -07:00
ecryptfs header cleaning: don't include smp_lock.h when not used 2007-05-08 11:15:07 -07:00
efs slab allocators: Remove SLAB_DEBUG_INITIAL flag 2007-05-07 12:12:57 -07:00
exportfs header cleaning: don't include smp_lock.h when not used 2007-05-08 11:15:07 -07:00
ext2 ext3: copy i_flags to inode flags on write 2007-05-08 11:15:13 -07:00
ext3 ext3: copy i_flags to inode flags on write 2007-05-08 11:15:12 -07:00
ext4 header cleaning: don't include smp_lock.h when not used 2007-05-08 11:15:07 -07:00
fat fat: fix VFAT compat ioctls on 64-bit systems 2007-05-08 11:15:14 -07:00
freevxfs freevxfs: possible null pointer dereference fix 2007-05-08 11:14:59 -07:00
fuse add filesystem subtype support 2007-05-08 11:15:01 -07:00
gfs2 header cleaning: don't include smp_lock.h when not used 2007-05-08 11:15:07 -07:00
hfs is_power_of_2 in fs/hfs 2007-05-08 11:14:59 -07:00
hfsplus is_power_of_2 in fs/hfs 2007-05-08 11:14:59 -07:00
hostfs uml: hostfs style fixes 2007-05-08 11:14:57 -07:00
hpfs slab allocators: Remove SLAB_DEBUG_INITIAL flag 2007-05-07 12:12:57 -07:00
hppfs
hugetlbfs hugetlbfs: add NULL check in hugetlb_zero_setup() 2007-05-07 12:12:57 -07:00
isofs slab allocators: Remove SLAB_DEBUG_INITIAL flag 2007-05-07 12:12:57 -07:00
jbd jbd: check for error returned by kthread_create on creating journal thread 2007-05-08 11:15:13 -07:00
jbd2 jbd: check for error returned by kthread_create on creating journal thread 2007-05-08 11:15:13 -07:00
jffs2 slab allocators: Remove SLAB_DEBUG_INITIAL flag 2007-05-07 12:12:57 -07:00
jfs Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/shaggy/jfs-2.6 2007-05-08 11:32:30 -07:00
lockd header cleaning: don't include smp_lock.h when not used 2007-05-08 11:15:07 -07:00
minix slab allocators: Remove SLAB_DEBUG_INITIAL flag 2007-05-07 12:12:57 -07:00
msdos
ncpfs header cleaning: don't include smp_lock.h when not used 2007-05-08 11:15:07 -07:00
nfs nfs: fix congestion control: use atomic_longs 2007-05-08 11:15:21 -07:00
nfs_common
nfsd knfsd: avoid Oops if buggy userspace performs confusing filehandle->dentry mapping 2007-05-09 12:30:54 -07:00
nls
ntfs header cleaning: don't include smp_lock.h when not used 2007-05-08 11:15:07 -07:00
ocfs2 header cleaning: don't include smp_lock.h when not used 2007-05-08 11:15:07 -07:00
openpromfs slab allocators: Remove SLAB_DEBUG_INITIAL flag 2007-05-07 12:12:57 -07:00
partitions partition: add support for sysv68 partitions 2007-05-08 11:15:09 -07:00
proc smaps: only define clear_refs for CONFIG_MMU 2007-05-08 20:41:14 -07:00
qnx4 slab allocators: Remove SLAB_DEBUG_INITIAL flag 2007-05-07 12:12:57 -07:00
ramfs header cleaning: don't include smp_lock.h when not used 2007-05-08 11:15:07 -07:00
reiserfs reiserfs: use __set_current_state() 2007-05-08 11:15:13 -07:00
romfs slab allocators: Remove SLAB_DEBUG_INITIAL flag 2007-05-07 12:12:57 -07:00
smbfs smbfs: remove unnecessary allow_signal 2007-05-08 11:15:11 -07:00
sysfs use simple_read_from_buffer() in fs/ 2007-05-09 12:30:49 -07:00
sysv header cleaning: don't include smp_lock.h when not used 2007-05-08 11:15:07 -07:00
udf udf: possible null pointer dereference while load_partition 2007-05-08 11:15:22 -07:00
ufs header cleaning: don't include smp_lock.h when not used 2007-05-08 11:15:07 -07:00
vfat
xfs Merge git://oss.sgi.com:8090/xfs/xfs-2.6 2007-05-08 11:59:33 -07:00
aio.c unify flush_work/flush_work_keventd and rename it to cancel_work_sync 2007-05-09 12:30:53 -07:00
attr.c header cleaning: don't include smp_lock.h when not used 2007-05-08 11:15:07 -07:00
bad_inode.c header cleaning: don't include smp_lock.h when not used 2007-05-08 11:15:07 -07:00
binfmt_aout.c
binfmt_elf.c Invalid return value of execve() resulting in oopses 2007-05-08 11:15:15 -07:00
binfmt_elf_fdpic.c header cleaning: don't include smp_lock.h when not used 2007-05-08 11:15:07 -07:00
binfmt_em86.c header cleaning: don't include smp_lock.h when not used 2007-05-08 11:15:07 -07:00
binfmt_flat.c
binfmt_misc.c use simple_read_from_buffer() in fs/ 2007-05-09 12:30:49 -07:00
binfmt_script.c header cleaning: don't include smp_lock.h when not used 2007-05-08 11:15:07 -07:00
binfmt_som.c
bio.c KMEM_CACHE(): simplify slab cache creation 2007-05-07 12:12:55 -07:00
block_dev.c is_power_of_2 in fs/block_dev.c 2007-05-08 11:14:59 -07:00
buffer.c header cleaning: don't include smp_lock.h when not used 2007-05-08 11:15:07 -07:00
char_dev.c
compat.c utimensat implementation 2007-05-08 11:15:18 -07:00
compat_ioctl.c Fix error handling in HDIO_GETGEO compat wrapper 2007-05-08 11:15:14 -07:00
dcache.c header cleaning: don't include smp_lock.h when not used 2007-05-08 11:15:07 -07:00
dcookies.c
direct-io.c
dnotify.c
dquot.c Introduce a handy list_first_entry macro 2007-05-08 11:15:11 -07:00
drop_caches.c
eventpoll.c Introduce a handy list_first_entry macro 2007-05-08 11:15:11 -07:00
exec.c (re)register_binfmt returns with -EBUSY 2007-05-08 11:15:08 -07:00
fcntl.c
fifo.c header cleaning: don't include smp_lock.h when not used 2007-05-08 11:15:07 -07:00
file.c
file_table.c header cleaning: don't include smp_lock.h when not used 2007-05-08 11:15:07 -07:00
filesystems.c add filesystem subtype support 2007-05-08 11:15:01 -07:00
fs-writeback.c
generic_acl.c
inode.c inode numbering: make static counters in new_inode and iunique be 32 bits 2007-05-08 11:15:16 -07:00
inotify.c Introduce a handy list_first_entry macro 2007-05-08 11:15:11 -07:00
inotify_user.c
internal.h cleanup compat ioctl handling 2007-05-08 11:15:09 -07:00
ioctl.c vfs: remove superflous sb == NULL checks 2007-05-08 11:15:02 -07:00
ioprio.c
Kconfig reiserfs: proc support requires PROC_FS 2007-05-08 11:15:04 -07:00
Kconfig.binfmt blackfin architecture 2007-05-07 12:12:58 -07:00
libfs.c inode numbering: change libfs sb creation routines to avoid collisions with their root inodes 2007-05-08 11:15:16 -07:00
locks.c Merge branch 'server-cluster-locking-api' of git://linux-nfs.org/~bfields/linux 2007-05-07 12:34:24 -07:00
Makefile
mbcache.c
mpage.c Factor outstanding I/O error handling 2007-05-08 11:14:57 -07:00
namei.c fs: use path_walk in do_path_lookup 2007-05-09 12:30:50 -07:00
namespace.c check privileges before setting mount propagation 2007-05-08 11:15:12 -07:00
nfsctl.c
no-block.c
open.c Remove suid/sgid bits on [f]truncate() 2007-05-08 20:10:00 -07:00
pipe.c VFS: delay the dentry name generation on sockets and pipes 2007-05-08 11:15:03 -07:00
pnode.c Introduce a handy list_first_entry macro 2007-05-08 11:15:11 -07:00
pnode.h
posix_acl.c
quota.c header cleaning: don't include smp_lock.h when not used 2007-05-08 11:15:07 -07:00
quota_v1.c
quota_v2.c
read_write.c use use SEEK_MAX to validate user lseek arguments 2007-05-08 11:14:59 -07:00
read_write.h
readdir.c ROUND_UP macro cleanup in fs/(select|compat|readdir).c 2007-05-08 11:15:09 -07:00
select.c ROUND_UP macro cleanup in fs/(select|compat|readdir).c 2007-05-08 11:15:09 -07:00
seq_file.c
splice.c [PATCH] splice: always call into page_cache_readahead() 2007-05-08 08:46:19 +02:00
stack.c
stat.c header cleaning: don't include smp_lock.h when not used 2007-05-08 11:15:07 -07:00
super.c add filesystem subtype support 2007-05-08 11:15:01 -07:00
sync.c Remove do_sync_file_range() 2007-05-08 11:15:04 -07:00
utimes.c utimensat implementation 2007-05-08 11:15:18 -07:00
xattr.c header cleaning: don't include smp_lock.h when not used 2007-05-08 11:15:07 -07:00
xattr_acl.c