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8a363970d1
linux/fs/ext4
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Theodore Ts'o 8a363970d1 ext4: avoid declaring fs inconsistent due to invalid file handles 
If we receive a file handle, either from NFS or open_by_handle_at(2),
and it points at an inode which has not been initialized, and the file
system has metadata checksums enabled, we shouldn't try to get the
inode, discover the checksum is invalid, and then declare the file
system as being inconsistent.

This can be reproduced by creating a test file system via "mke2fs -t
ext4 -O metadata_csum /tmp/foo.img 8M", mounting it, cd'ing into that
directory, and then running the following program.

#define _GNU_SOURCE
#include <fcntl.h>

struct handle {
	struct file_handle fh;
	unsigned char fid[MAX_HANDLE_SZ];
};

int main(int argc, char **argv)
{
	struct handle h = {{8, 1 }, { 12, }};

	open_by_handle_at(AT_FDCWD, &h.fh, O_RDONLY);
	return 0;
}

Google-Bug-Id: 120690101
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org
2018-12-19 12:29:13 -05:00
..
acl.c ext4: compare old and new mode before setting update_mode flag 2018-12-10 00:22:38 -05:00
acl.h ext4: fix up remaining files with SPDX cleanups 2017-12-17 22:00:59 -05:00
balloc.c ext4: use ext4_warning() for sb_getblk failure 2018-08-01 12:02:31 -04:00
bitmap.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
block_validity.c ext4: use 'sbi' instead of 'EXT4_SB(sb)' 2018-01-11 13:17:49 -05:00
dir.c ext4: avoid divide by zero fault when deleting corrupted inline directories 2018-08-27 09:22:45 -04:00
ext4_extents.h ext4: adjust reserved cluster count when removing extents 2018-10-01 14:25:08 -04:00
ext4_jbd2.c ext4: shutdown should not prevent get_write_access 2018-02-18 22:07:36 -05:00
ext4_jbd2.h ext4: fix up remaining files with SPDX cleanups 2017-12-17 22:00:59 -05:00
ext4.h ext4: avoid declaring fs inconsistent due to invalid file handles 2018-12-19 12:29:13 -05:00
extents_status.c ext4: fix reserved cluster accounting at page invalidation time 2018-10-01 14:33:24 -04:00
extents_status.h ext4: reduce reserved cluster count by number of allocated clusters 2018-10-01 14:24:08 -04:00
extents.c ext4: adjust reserved cluster count when removing extents 2018-10-01 14:25:08 -04:00
file.c dax: remove VM_MIXEDMAP for fsdax and device dax 2018-08-17 16:20:27 -07:00
fsmap.c ext4: make function ‘ext4_getfsmap_find_fixed_metadata’ static 2018-05-10 11:50:04 -04:00
fsmap.h ext4: fix up remaining files with SPDX cleanups 2017-12-17 22:00:59 -05:00
fsync.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
hash.c ext4: fix up remaining files with SPDX cleanups 2017-12-17 22:00:59 -05:00
ialloc.c ext4: avoid declaring fs inconsistent due to invalid file handles 2018-12-19 12:29:13 -05:00
indirect.c ext4: fix hole length detection in ext4_ind_map_blocks() 2018-05-12 19:55:00 -04:00
inline.c ext4: missing unlock/put_page() in ext4_try_to_write_inline_data() 2018-12-04 00:06:53 -05:00
inode.c ext4: avoid declaring fs inconsistent due to invalid file handles 2018-12-19 12:29:13 -05:00
ioctl.c ext4: avoid declaring fs inconsistent due to invalid file handles 2018-12-19 12:29:13 -05:00
Kconfig fs/*/Kconfig: drop links to 404-compliant http://acl.bestbits.at 2018-01-01 12:45:37 -07:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mballoc.c ext4: adjust reserved cluster count when removing extents 2018-10-01 14:25:08 -04:00
mballoc.h ext4: fix up remaining files with SPDX cleanups 2017-12-17 22:00:59 -05:00
migrate.c ext4: clean up indentation issues, remove extraneous tabs 2018-12-04 00:16:44 -05:00
mmp.c ext4: don't mark mmp buffer head dirty 2018-09-15 17:11:25 -04:00
move_extent.c ext4: fix argument checking in EXT4_IOC_MOVE_EXT 2018-10-02 01:34:44 -04:00
namei.c ext4: avoid declaring fs inconsistent due to invalid file handles 2018-12-19 12:29:13 -05:00
page-io.c blkcg: revert blkcg cleanups series 2018-11-01 19:59:53 -06:00
readpage.c ext4: readpages() should submit IO as read-ahead 2018-08-17 16:20:29 -07:00
resize.c ext4: avoid declaring fs inconsistent due to invalid file handles 2018-12-19 12:29:13 -05:00
super.c ext4: avoid declaring fs inconsistent due to invalid file handles 2018-12-19 12:29:13 -05:00
symlink.c ext4: switch to fscrypt_get_symlink() 2018-01-11 22:10:40 -05:00
sysfs.c for-4.19/block-20180812 2018-08-14 10:23:25 -07:00
truncate.h ext4: handle layout changes to pinned DAX mappings 2018-07-29 17:00:22 -04:00
xattr_security.c ext4: use XATTR_CREATE in ext4_initxattrs() 2018-05-10 11:52:14 -04:00
xattr_trusted.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
xattr_user.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
xattr.c ext4: avoid declaring fs inconsistent due to invalid file handles 2018-12-19 12:29:13 -05:00
xattr.h ext4: add extra checks to ext4_xattr_block_get() 2018-03-30 20:04:11 -04:00