Haogang Chen 481fe17e97 nilfs2: potential integer overflow in nilfs_ioctl_clean_segments() ... There is a potential integer overflow in nilfs_ioctl_clean_segments(). When a large argv[n].v_nmembs is passed from the userspace, the subsequent call to vmalloc() will allocate a buffer smaller than expected, which leads to out-of-bound access in nilfs_ioctl_move_blocks() and lfs_clean_segments(). The following check does not prevent the overflow because nsegs is also controlled by the userspace and could be very large. if (argv[n].v_nmembs > nsegs * nilfs->ns_blocks_per_segment) goto out_free; This patch clamps argv[n].v_nmembs to UINT_MAX / argv[n].v_size, and returns -EINVAL when overflow. Signed-off-by: Haogang Chen <haogangchen@gmail.com> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2011-12-20 10:25:04 -08:00
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alloc.c	nilfs2: use mark_buffer_dirty to mark btnode or meta data dirty	2011-05-10 22:21:57 +09:00
alloc.h	nilfs2: use little-endian bitops	2011-03-23 19:46:18 -07:00
bmap.c	nilfs2: get rid of NILFS_I_NILFS	2011-05-10 22:21:56 +09:00
bmap.h	nilfs2: record used amount of each checkpoint in checkpoint list	2011-03-08 14:58:31 +09:00
btnode.c	nilfs2: use mark_buffer_dirty to mark btnode or meta data dirty	2011-05-10 22:21:57 +09:00
btnode.h	nilfs2: use mark_buffer_dirty to mark btnode or meta data dirty	2011-05-10 22:21:57 +09:00
btree.c	nilfs2: fix missing block address termination in btree node shrinking	2011-06-11 15:51:15 +09:00
btree.h	nilfs2: get rid of nilfs_bmap_union	2010-07-23 10:02:14 +09:00
cpfile.c	nilfs2: use mark_buffer_dirty to mark btnode or meta data dirty	2011-05-10 22:21:57 +09:00
cpfile.h	nilfs2: use iget for all metadata files	2010-10-23 09:24:38 +09:00
dat.c	nilfs2: use mark_buffer_dirty to mark btnode or meta data dirty	2011-05-10 22:21:57 +09:00
dat.h	nilfs2: use iget for all metadata files	2010-10-23 09:24:38 +09:00
dir.c	nilfs2: add compat ioctl	2011-03-08 14:58:30 +09:00
direct.c	nilfs2: record used amount of each checkpoint in checkpoint list	2011-03-08 14:58:31 +09:00
direct.h	nilfs2: get rid of nilfs_bmap_union	2010-07-23 10:02:14 +09:00
export.h	nilfs2: make snapshots in checkpoint tree exportable	2010-10-23 09:24:34 +09:00
file.c	fs: push i_mutex and filemap_write_and_wait down into ->fsync() handlers	2011-07-20 20:47:59 -04:00
gcinode.c	nilfs2: use mark_buffer_dirty to mark btnode or meta data dirty	2011-05-10 22:21:57 +09:00
ifile.c	nilfs2: use mark_buffer_dirty to mark btnode or meta data dirty	2011-05-10 22:21:57 +09:00
ifile.h	nilfs2: use iget for all metadata files	2010-10-23 09:24:38 +09:00
inode.c	filesystems: add set_nlink()	2011-11-02 12:53:43 +01:00
ioctl.c	nilfs2: potential integer overflow in nilfs_ioctl_clean_segments()	2011-12-20 10:25:04 -08:00
Kconfig	Revert "task_struct: make journal_info conditional"	2009-12-17 13:23:24 -08:00
Makefile	nilfs2: get rid of GCDAT inode	2010-10-23 09:24:38 +09:00
mdt.c	nilfs2: use mark_buffer_dirty to mark btnode or meta data dirty	2011-05-10 22:21:57 +09:00
mdt.h	nilfs2: use mark_buffer_dirty to mark btnode or meta data dirty	2011-05-10 22:21:57 +09:00
namei.c	filesystems: add set_nlink()	2011-11-02 12:53:43 +01:00
nilfs.h	treewide: use __printf not __attribute__((format(printf,...)))	2011-10-31 17:30:54 -07:00
page.c	nilfs2: use mark_buffer_dirty to mark btnode or meta data dirty	2011-05-10 22:21:57 +09:00
page.h	nilfs2: use mark_buffer_dirty to mark btnode or meta data dirty	2011-05-10 22:21:57 +09:00
recovery.c	nilfs2: use list_first_entry	2011-05-10 22:21:56 +09:00
segbuf.c	nilfs2: super root size should change depending on inode size	2011-05-10 22:21:44 +09:00
segbuf.h	nilfs2: get rid of macros for segment summary information	2010-07-23 10:02:09 +09:00
segment.c	nilfs2: fix problem in setting checkpoint interval	2011-06-11 15:51:15 +09:00
segment.h	nilfs2: get rid of private page allocator	2011-05-10 22:21:44 +09:00
sufile.c	nilfs2: use mark_buffer_dirty to mark btnode or meta data dirty	2011-05-10 22:21:57 +09:00
sufile.h	nilfs2: get rid of NILFS_I_NILFS	2011-05-10 22:21:56 +09:00
super.c	nilfs2: always set back pointer to host inode in mapping->host	2011-05-10 22:21:57 +09:00
the_nilfs.c	nilfs2: implement resize ioctl	2011-05-10 22:21:46 +09:00
the_nilfs.h	nilfs2: implement resize ioctl	2011-05-10 22:21:46 +09:00