NeilBrown 2520f14ca8 [PATCH] Fix overflow tests for compat_sys_fcntl64 locking ... When making an fctl locking call through compat_sys_fcntl64 (i.e. a 32bit app on a 64bit kernel), the syscall can return a locking range that is in conflict with the queried lock. If some aspect of this range does not fit in the 32bit structure, something needs to be done. The current code is wrong in several respects: - It returns data to userspace even if no conflict was found i.e. it should check l_type for F_UNLCK - It returns -EOVERFLOW too agressively. A lock range covering the last possible byte of the file (start = COMPAT_OFF_T_MAX, len = 1) should be possible, but is rejected with the current test. - A extra-long 'len' should not be a problem. If only that part of the conflicting lock that would be visible to the 32bit app needs to be reported to the 32bit app anyway. This patch addresses those three issues and adds a comment to (hopefully) record it for posterity. Note: this patch mainly affects test-cases. Real applications rarely is ever see the problems. This patch has been tested (LSB test suite), and works. Signed-off-by: Neil Brown <neilb@suse.de> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Christoph Hellwig <hch@lst.de> Cc: Matthew Wilcox <willy@debian.org> Cc: Trond Myklebust <trond.myklebust@fys.uio.no> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>		2006-01-08 20:13:52 -08:00
..
9p	[PATCH] Fix and add EXPORT_SYMBOL(filemap_write_and_wait)	2006-01-08 20:13:47 -08:00
adfs	[PATCH] changing CONFIG_LOCALVERSION rebuilds too much, for no good reason	2005-11-09 07:55:57 -08:00
affs	[PATCH] kfree cleanup: fs	2005-11-07 07:54:06 -08:00
afs	fs/afs/callback.c should #include "cmservice.h"	2005-11-08 16:56:17 +01:00
autofs	[PATCH] kfree cleanup: fs	2005-11-07 07:54:06 -08:00
autofs4	[PATCH] kfree cleanup: fs	2005-11-07 07:54:06 -08:00
befs	remove unused fs/befs/attribute.c	2005-11-08 16:54:53 +01:00
bfs	[PATCH] bfs iget() abuses	2005-10-04 13:22:01 -07:00
cifs	[PATCH] Fix and add EXPORT_SYMBOL(filemap_write_and_wait)	2006-01-08 20:13:47 -08:00
coda	[PATCH] Driver Core: fix up all callers of class_device_create()	2005-10-28 09:52:52 -07:00
configfs	[PATCH] configfs: User-driven configuration filesystem	2006-01-03 11:45:28 -08:00
cramfs	[PATCH] fs/cramfs/uncompress.c should #include <linux/cramfs_fs.h>	2005-09-10 10:06:35 -07:00
debugfs	[PATCH] remove duplicate get_dentry functions in various places	2005-06-23 09:45:20 -07:00
devfs	[PATCH] kfree cleanup: fs	2005-11-07 07:54:06 -08:00
devpts	[PATCH] Generic VFS fallback for security xattrs	2005-09-05 00:05:52 -07:00
efs
exportfs
ext2	[PATCH] ext2: remove duplicate newlines in ext2_fill_super	2005-11-13 18:14:17 -08:00
ext3	[PATCH] ext3: Wrong return value for EXT3_IOC_GROUP_ADD	2005-11-28 14:42:24 -08:00
fat	[PATCH] fat: support a truncate() for expanding size (generic_cont_expand)	2006-01-08 20:13:47 -08:00
freevxfs	fs/freevxfs/: add #include's	2005-11-08 16:47:45 +01:00
fuse	[PATCH] fuse: check file type in lookup	2006-01-06 08:33:56 -08:00
hfs	[PATCH] changing CONFIG_LOCALVERSION rebuilds too much, for no good reason	2005-11-09 07:55:57 -08:00
hfsplus	[PATCH] hfsplus oops fix	2006-01-06 08:33:20 -08:00
hostfs	[PATCH] uml: hostfs - fix possible PAGE_CACHE_SHIFT overflows	2005-12-29 09:48:15 -08:00
hpfs	[PATCH] hpfs: remove spurious mtime update	2005-11-09 07:55:57 -08:00
hppfs	[PATCH] hppfs: fix symlink error path	2005-08-26 11:39:19 -07:00
hugetlbfs	[PATCH] Hugetlb: Copy on Write support	2006-01-06 08:33:23 -08:00
isofs	[PATCH] kfree cleanup: fs	2005-11-07 07:54:06 -08:00
jbd	[PATCH] jbd: split checkpoint lists	2006-01-06 08:33:59 -08:00
jffs	jffs_fm.c should #include "intrep.h"	2005-11-08 16:48:36 +01:00
jffs2	[JFFS2] Fix the slab cache constructor of 'struct jffs2_inode_info' objects.	2005-11-29 16:57:17 +01:00
jfs	[PATCH] Fix and add EXPORT_SYMBOL(filemap_write_and_wait)	2006-01-08 20:13:47 -08:00
lockd	SUNRPC: get rid of cl_chatty	2006-01-06 14:58:56 -05:00
minix	[PATCH] update filesystems for new delete_inode behavior	2005-09-09 13:57:27 -07:00
msdos	[PATCH] fat: remove the unneeded vfat_find() in vfat_rename()	2005-10-30 17:37:32 -08:00
ncpfs	[PATCH] add a file_permission helper	2005-11-09 07:55:59 -08:00
nfs	[PATCH] Fix and add EXPORT_SYMBOL(filemap_write_and_wait)	2006-01-08 20:13:47 -08:00
nfs_common	[PATCH] nfsacl: Solaris VxFS compatibility fix	2005-10-11 09:46:54 -07:00
nfsd	SUNRPC: get rid of cl_chatty	2006-01-06 14:58:56 -05:00
nls
ntfs	update the email address of Randy Dunlap	2006-01-03 13:37:51 +01:00
ocfs2	[PATCH] This patch contains the following cleanups:	2006-01-03 11:45:55 -08:00
openpromfs	[PATCH] kfree cleanup: fs	2005-11-07 07:54:06 -08:00
partitions	[PATCH] s390: cleanup Kconfig	2006-01-06 08:33:53 -08:00
proc	[PATCH] slob: introduce the SLOB allocator	2006-01-08 20:13:41 -08:00
qnx4	fs/qnx4/bitmap.c: #if 0 qnx4_new_block()	2006-01-03 13:21:37 +01:00
ramfs	[PATCH] NOMMU: Provide shared-writable mmap support on ramfs	2006-01-06 08:33:32 -08:00
reiserfs	s/retreiv/retriev/g	2006-01-03 13:27:11 +01:00
relayfs	[PATCH] relayfs: cleanup, change relayfs_file_* to relay_file_*	2006-01-08 20:13:51 -08:00
romfs
smbfs	[PATCH] Fix and add EXPORT_SYMBOL(filemap_write_and_wait)	2006-01-08 20:13:47 -08:00
sysfs	[PATCH] sysfs: handle failures in sysfs_make_dirent	2006-01-04 16:18:09 -08:00
sysv	[PATCH] update filesystems for new delete_inode behavior	2005-09-09 13:57:27 -07:00
udf	[PATCH] udf: remove bogus inode == NULL check in inode_bmap	2006-01-08 20:13:51 -08:00
ufs	[PATCH] fs/ufs: debug mode compilation failure	2006-01-06 15:22:28 -08:00
vfat	[PATCH] fat: remove the unneeded vfat_find() in vfat_rename()	2005-10-30 17:37:32 -08:00
xfs	[PATCH] Fix and add EXPORT_SYMBOL(filemap_write_and_wait)	2006-01-08 20:13:47 -08:00
aio.c	[PATCH] rcu file: use atomic primitives	2006-01-08 20:13:48 -08:00
attr.c	[PATCH] Fix some problems with truncate and mtime semantics.	2006-01-08 20:13:52 -08:00
bad_inode.c
binfmt_aout.c	[PATCH] mm: mm_init set_mm_counters	2005-10-29 21:40:38 -07:00
binfmt_elf.c	[PATCH] kfree cleanup: fs	2005-11-07 07:54:06 -08:00
binfmt_elf_fdpic.c	[PATCH] kfree cleanup: fs	2005-11-07 07:54:06 -08:00
binfmt_em86.c
binfmt_flat.c	[PATCH] mm: mm_init set_mm_counters	2005-10-29 21:40:38 -07:00
binfmt_misc.c	[PATCH] add a file_permission helper	2005-11-09 07:55:59 -08:00
binfmt_script.c
binfmt_som.c	[PATCH] mm: mm_init set_mm_counters	2005-10-29 21:40:38 -07:00
bio.c	[BLOCK] bio: check for same page merge possibilities in __bio_add_page()	2006-01-06 09:43:28 +01:00
block_dev.c	[PATCH] block: add unlocked_ioctl support for block devices	2005-06-23 09:45:32 -07:00
buffer.c	[PATCH] Fix and add EXPORT_SYMBOL(filemap_write_and_wait)	2006-01-08 20:13:47 -08:00
char_dev.c	[PATCH] cdev: cdev_put oops	2005-07-12 16:01:02 -07:00
compat.c	[PATCH] Fix overflow tests for compat_sys_fcntl64 locking	2006-01-08 20:13:52 -08:00
compat_ioctl.c	[COMPAT] net: SIOCGIFCONF data corruption	2005-11-20 13:41:59 -08:00
dcache.c	[PATCH] Remove hlist_for_each_rcu() API, convert existing use to hlist_for_each_entry_rcu	2005-11-07 07:53:35 -08:00
dcookies.c	[PATCH] dcookies.c: use proper refcounting functions	2005-07-07 18:23:52 -07:00
direct-io.c	[PATCH] core remove PageReserved	2005-10-29 21:40:39 -07:00
dnotify.c
dquot.c	[PATCH] Fix oops in vfs_quotaon_mount()	2005-11-28 14:42:26 -08:00
drop_caches.c	[PATCH] drop-pagecache	2006-01-08 20:12:40 -08:00
eventpoll.c	[PATCH] epoll: handle timeout overflow	2005-09-28 07:46:41 -07:00
exec.c	[PATCH] Fix some problems with truncate and mtime semantics.	2006-01-08 20:13:52 -08:00
fcntl.c	[PATCH] files: lock-free fd look-up	2005-09-09 13:57:55 -07:00
fifo.c
file.c	[PATCH] Fix the fdtable freeing in the case of vmalloced fdset/arrays	2005-09-14 12:38:26 -07:00
file_table.c	[PATCH] rcu file: use atomic primitives	2006-01-08 20:13:48 -08:00
filesystems.c	[PATCH] fix missing includes	2005-10-30 17:37:32 -08:00
fs-writeback.c	[PATCH] kernel-docs: fix kernel-doc format problems	2005-11-07 07:53:55 -08:00
inode.c	[PATCH] fix nr_unused accounting, and avoid recursing in iput with I_WILL_FREE set	2005-10-30 17:37:26 -08:00
inotify.c	[PATCH] inotify: add two inotify_add_watch flags	2005-12-12 08:57:43 -08:00
ioctl.c
ioprio.c	fs/ioprio.c should #include <linux/syscalls.h>	2005-11-08 16:57:02 +01:00
Kconfig	[PATCH] o Update Kconfig documentation to reflect support for readonly mounts.	2006-01-03 11:45:57 -08:00
Kconfig.binfmt	[PATCH] frv: suppress configuration of certain features for FRV	2006-01-08 20:13:36 -08:00
libfs.c	[PATCH] fix fsync(dir) return value for ram-based filesystems	2005-06-25 16:24:38 -07:00
locks.c	NLM: Further cancel fixes	2006-01-06 14:58:54 -05:00
Makefile	[PATCH] drop-pagecache	2006-01-08 20:12:40 -08:00
mbcache.c	[PATCH] kfree cleanup: fs	2005-11-07 07:54:06 -08:00
mpage.c	[PATCH] add AOP_TRUNCATED_PAGE, prepend AOP_ to WRITEPAGE_ACTIVATE	2006-01-03 11:45:42 -08:00
namei.c	[PATCH] Fix some problems with truncate and mtime semantics.	2006-01-08 20:13:52 -08:00
namespace.c	[PATCH] add a vfs_permission helper	2005-11-09 07:55:58 -08:00
nfsctl.c
open.c	[PATCH] Fix some problems with truncate and mtime semantics.	2006-01-08 20:13:52 -08:00
pipe.c	[PATCH] sched: TASK_NONINTERACTIVE	2005-09-10 10:06:22 -07:00
pnode.c	[PATCH] unbindable mounts	2005-11-07 18:18:11 -08:00
pnode.h	[PATCH] unbindable mounts	2005-11-07 18:18:11 -08:00
posix_acl.c	[PATCH] gfp flags annotations - part 1	2005-10-08 15:00:57 -07:00
quota.c	[PATCH] quota: small cleanups	2005-11-07 07:53:39 -08:00
quota_v1.c
quota_v2.c
read_write.c	Relax the rw_verify_area() error checking.	2006-01-04 16:20:40 -08:00
readdir.c
select.c	[PATCH] files: lock-free fd look-up	2005-09-09 13:57:55 -07:00
seq_file.c	[PATCH] allow callers of seq_open do allocation themselves	2005-11-07 18:18:09 -08:00
stat.c
super.c	[PATCH] remove mount/umount uevents from superblock handling	2006-01-04 16:18:07 -08:00
xattr.c	[PATCH] Fix listxattr() for generic security attributes	2005-12-12 08:57:42 -08:00
xattr_acl.c