Jon Derrick a17712c8e4 ext4: check superblock mapped prior to committing ... This patch attempts to close a hole leading to a BUG seen with hot removals during writes [1]. A block device (NVME namespace in this test case) is formatted to EXT4 without partitions. It's mounted and write I/O is run to a file, then the device is hot removed from the slot. The superblock attempts to be written to the drive which is no longer present. The typical chain of events leading to the BUG: ext4_commit_super() __sync_dirty_buffer() submit_bh() submit_bh_wbc() BUG_ON(!buffer_mapped(bh)); This fix checks for the superblock's buffer head being mapped prior to syncing. [1] https://www.spinics.net/lists/linux-ext4/msg56527.html Signed-off-by: Jon Derrick <jonathan.derrick@intel.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu> Cc: stable@kernel.org		2018-07-02 18:45:18 -04:00
..
acl.c
acl.h	ext4: fix up remaining files with SPDX cleanups	2017-12-17 22:00:59 -05:00
balloc.c	ext4: only look at the bg_flags field if it is valid	2018-06-14 00:58:00 -04:00
bitmap.c
block_validity.c	ext4: use 'sbi' instead of 'EXT4_SB(sb)'	2018-01-11 13:17:49 -05:00
dir.c	ext4: force revalidation of directory pointer after seekdir(2)	2018-04-01 23:21:03 -04:00
ext4_extents.h	ext4: verify the depth of extent tree in ext4_find_extent()	2018-06-14 12:55:10 -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: add more inode number paranoia checks	2018-06-17 00:41:14 -04:00
extents_status.c	ext4: remove NULL check before calling kmem_cache_destroy()	2018-05-20 22:44:13 -04:00
extents_status.h	ext4: fix up remaining files with SPDX cleanups	2017-12-17 22:00:59 -05:00
extents.c	ext4: verify the depth of extent tree in ext4_find_extent()	2018-06-14 12:55:10 -04:00
file.c	ext4: do not update s_last_mounted of a frozen fs	2018-05-13 22:54:44 -04:00
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
hash.c	ext4: fix up remaining files with SPDX cleanups	2017-12-17 22:00:59 -05:00
ialloc.c	ext4: only look at the bg_flags field if it is valid	2018-06-14 00:58:00 -04:00
indirect.c	ext4: fix hole length detection in ext4_ind_map_blocks()	2018-05-12 19:55:00 -04:00
inline.c	ext4: avoid running out of journal credits when appending to an inline file	2018-06-16 23:41:59 -04:00
inode.c	ext4: add more inode number paranoia checks	2018-06-17 00:41:14 -04:00
ioctl.c	ext4: remove EXT4_STATE_DIOREAD_LOCK flag	2018-03-22 11:52:10 -04:00
Kconfig	fs/*/Kconfig: drop links to 404-compliant http://acl.bestbits.at	2018-01-01 12:45:37 -07:00
Makefile
mballoc.c	ext4: only look at the bg_flags field if it is valid	2018-06-14 00:58:00 -04:00
mballoc.h	ext4: fix up remaining files with SPDX cleanups	2017-12-17 22:00:59 -05:00
migrate.c	ext4: fix up remaining files with SPDX cleanups	2017-12-17 22:00:59 -05:00
mmp.c
move_extent.c	ext4: remove EXT4_STATE_DIOREAD_LOCK flag	2018-03-22 11:52:10 -04:00
namei.c	Refactor support for encrypted symlinks to move common code to fscrypt.	2018-02-04 10:43:12 -08:00
page-io.c
readpage.c
resize.c	ext4: fix fencepost error in check for inode count overflow during resize	2018-05-25 12:51:25 -04:00
super.c	ext4: check superblock mapped prior to committing	2018-07-02 18:45:18 -04:00
symlink.c	ext4: switch to fscrypt_get_symlink()	2018-01-11 22:10:40 -05:00
sysfs.c	ext4: simplify kobject usage	2018-03-30 00:41:34 -04:00
truncate.h	ext4: fix up remaining files with SPDX cleanups	2017-12-17 22:00:59 -05:00
xattr_security.c	ext4: use XATTR_CREATE in ext4_initxattrs()	2018-05-10 11:52:14 -04:00
xattr_trusted.c
xattr_user.c
xattr.c	ext4: avoid running out of journal credits when appending to an inline file	2018-06-16 23:41:59 -04:00
xattr.h	ext4: add extra checks to ext4_xattr_block_get()	2018-03-30 20:04:11 -04:00