You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

Ryusuke Konishi d7178c79d9 nilfs2: fix NULL pointer dereference in nilfs_load_super_block() ... According to the report from Slicky Devil, nilfs caused kernel oops at nilfs_load_super_block function during mount after he shrank the partition without resizing the filesystem: BUG: unable to handle kernel NULL pointer dereference at 00000048 IP: [<d0d7a08e>] nilfs_load_super_block+0x17e/0x280 [nilfs2] *pde = 00000000 Oops: 0000 [#1] PREEMPT SMP ... Call Trace: [<d0d7a87b>] init_nilfs+0x4b/0x2e0 [nilfs2] [<d0d6f707>] nilfs_mount+0x447/0x5b0 [nilfs2] [<c0226636>] mount_fs+0x36/0x180 [<c023d961>] vfs_kern_mount+0x51/0xa0 [<c023ddae>] do_kern_mount+0x3e/0xe0 [<c023f189>] do_mount+0x169/0x700 [<c023fa9b>] sys_mount+0x6b/0xa0 [<c04abd1f>] sysenter_do_call+0x12/0x28 Code: 53 18 8b 43 20 89 4b 18 8b 4b 24 89 53 1c 89 43 24 89 4b 20 8b 43 20 c7 43 2c 00 00 00 00 23 75 e8 8b 50 68 89 53 28 8b 54 b3 20 <8b> 72 48 8b 7a 4c 8b 55 08 89 b3 84 00 00 00 89 bb 88 00 00 00 EIP: [<d0d7a08e>] nilfs_load_super_block+0x17e/0x280 [nilfs2] SS:ESP 0068:ca9bbdcc CR2: 0000000000000048 This turned out due to a defect in an error path which runs if the calculated location of the secondary super block was invalid. This patch fixes it and eliminates the reported oops. Reported-by: Slicky Devil <slicky.dvl@gmail.com> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Tested-by: Slicky Devil <slicky.dvl@gmail.com> Cc: <stable@vger.kernel.org> [2.6.30+] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		13 years ago
..
Kconfig	…
Makefile	nilfs2: get rid of GCDAT inode	14 years ago
alloc.c	nilfs2: use mark_buffer_dirty to mark btnode or meta data dirty	14 years ago
alloc.h	nilfs2: use little-endian bitops	14 years ago
bmap.c	nilfs2: get rid of NILFS_I_NILFS	14 years ago
bmap.h	nilfs2: record used amount of each checkpoint in checkpoint list	14 years ago
btnode.c	nilfs2: use mark_buffer_dirty to mark btnode or meta data dirty	14 years ago
btnode.h	nilfs2: use mark_buffer_dirty to mark btnode or meta data dirty	14 years ago
btree.c	nilfs2: fix missing block address termination in btree node shrinking	14 years ago
btree.h	…
cpfile.c	nilfs2: use mark_buffer_dirty to mark btnode or meta data dirty	14 years ago
cpfile.h	nilfs2: use iget for all metadata files	14 years ago
dat.c	nilfs2: use mark_buffer_dirty to mark btnode or meta data dirty	14 years ago
dat.h	nilfs2: use iget for all metadata files	14 years ago
dir.c	nilfs: propagate umode_t	13 years ago
direct.c	nilfs2: record used amount of each checkpoint in checkpoint list	14 years ago
direct.h	…
export.h	nilfs2: make snapshots in checkpoint tree exportable	14 years ago
file.c	fs: push i_mutex and filemap_write_and_wait down into ->fsync() handlers	14 years ago
gcinode.c	nilfs2: use mark_buffer_dirty to mark btnode or meta data dirty	14 years ago
ifile.c	nilfs2: use mark_buffer_dirty to mark btnode or meta data dirty	14 years ago
ifile.h	nilfs2: use iget for all metadata files	14 years ago
inode.c	nilfs: propagate umode_t	13 years ago
ioctl.c	nilfs2: avoid overflowing segment numbers in nilfs_ioctl_clean_segments()	13 years ago
mdt.c	nilfs2: use mark_buffer_dirty to mark btnode or meta data dirty	14 years ago
mdt.h	nilfs2: use mark_buffer_dirty to mark btnode or meta data dirty	14 years ago
namei.c	switch ->mknod() to umode_t	13 years ago
nilfs.h	nilfs: propagate umode_t	13 years ago
page.c	nilfs2: use mark_buffer_dirty to mark btnode or meta data dirty	14 years ago
page.h	nilfs2: use mark_buffer_dirty to mark btnode or meta data dirty	14 years ago
recovery.c	nilfs2: use list_first_entry	14 years ago
segbuf.c	nilfs2: super root size should change depending on inode size	14 years ago
segbuf.h	…
segment.c	freezer: unexport refrigerator() and update try_to_freeze() slightly	13 years ago
segment.h	nilfs2: get rid of private page allocator	14 years ago
sufile.c	nilfs2: use mark_buffer_dirty to mark btnode or meta data dirty	14 years ago
sufile.h	nilfs2: get rid of NILFS_I_NILFS	14 years ago
super.c	vfs: switch ->show_options() to struct dentry *	13 years ago
the_nilfs.c	nilfs2: fix NULL pointer dereference in nilfs_load_super_block()	13 years ago
the_nilfs.h	nilfs2: implement resize ioctl	14 years ago