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Andrea Righi 3897b6f0a8 btrfs: raid56: properly unmap parity page in finish_parity_scrub() 
Parity page is incorrectly unmapped in finish_parity_scrub(), triggering
a reference counter bug on i386, i.e.:

 [ 157.662401] kernel BUG at mm/highmem.c:349!
 [ 157.666725] invalid opcode: 0000 [#1] SMP PTI

The reason is that kunmap(p_page) was completely left out, so we never
did an unmap for the p_page and the loop unmapping the rbio page was
iterating over the wrong number of stripes: unmapping should be done
with nr_data instead of rbio->real_stripes.

Test case to reproduce the bug:

 - create a raid5 btrfs filesystem:
   # mkfs.btrfs -m raid5 -d raid5 /dev/sdb /dev/sdc /dev/sdd /dev/sde

 - mount it:
   # mount /dev/sdb /mnt

 - run btrfs scrub in a loop:
   # while :; do btrfs scrub start -BR /mnt; done

BugLink: https://bugs.launchpad.net/bugs/1812845
Fixes: 5a6ac9eacb49 ("Btrfs, raid56: support parity scrub on raid56")
CC: stable@vger.kernel.org # 4.4+
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Andrea Righi <andrea.righi@canonical.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2019-03-18 19:47:36 +01:00
..
9p
Merge branch 'work.afs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2018-11-01 19:58:52 -07:00
adfs
adfs: use timespec64 for time conversion
2018-08-22 10:52:51 -07:00
affs
affs: fix potential memory leak when parsing option 'prefix'
2018-05-28 12:36:41 +02:00
afs
afs: Fix race in async call refcounting
2019-01-17 15:17:28 +00:00
autofs
autofs: fix error return in autofs_fill_super()
2019-02-01 15:46:24 -08:00
befs
fix a series of Documentation/ broken file name references
2018-06-15 18:10:01 -03:00
bfs
bfs: extra sanity checking and static inode bitmap
2019-01-04 13:13:47 -08:00
btrfs
btrfs: raid56: properly unmap parity page in finish_parity_scrub()
2019-03-18 19:47:36 +01:00
cachefiles
fscache, cachefiles: remove redundant variable 'cache'
2018-11-30 16:00:58 +00:00
ceph
ceph: avoid repeatedly adding inode to mdsc->snap_flush_list
2019-02-18 18:08:29 +01:00
cifs
cifs: update internal module version number
2019-01-31 07:05:06 -06:00
coda
vfs: change inode times to use struct timespec64
2018-06-05 16:57:31 -07:00
configfs
configfs: fix registered group removal
2018-07-17 06:14:07 -07:00
cramfs
Make the Cramfs code more robust against filesystem corruptions,
2018-10-30 12:46:25 -07:00
crypto
fscrypt: add Adiantum support
2019-01-06 08:36:21 -05:00
debugfs
debugfs: debugfs_lookup() should return NULL if not found
2019-01-30 12:39:49 +01:00
devpts
devpts: Convert to new IDA API
2018-08-21 23:54:17 -04:00
dlm
dlm: fix invalid cluster name warning
2018-12-03 15:30:24 -06:00
ecryptfs
ecryptfs_rename(): verify that lower dentries are still OK after lock_rename()
2018-10-09 23:33:17 -04:00
efivarfs
efivars: Call guid_parse() against guid_t type of variable
2018-07-22 14:13:44 +02:00
efs
…
exofs
exofs_mount(): fix leaks on failure exits
2018-12-17 18:36:33 -05:00
exportfs
exportfs: do not read dentry after free
2018-11-23 09:08:17 -05:00
ext2
\n
2018-12-27 17:00:35 -08:00
ext4
Revert "ext4: use ext4_write_inode() when fsyncing w/o a journal"
2019-01-31 23:41:11 -05:00
f2fs
f2fs-for-4.21-rc1
2018-12-31 09:41:37 -08:00
fat
Merge branch 'akpm' (patches from Andrew)
2019-01-05 09:16:18 -08:00
freevxfs
freevxfs_lookup(): use d_splice_alias()
2018-05-22 14:27:51 -04:00
fscache
fscache: fix race between enablement and dropping of object
2018-11-30 15:57:31 +00:00
fuse
fuse: decrement NR_WRITEBACK_TEMP on the right page
2019-01-16 10:27:59 +01:00
gfs2
Revert "gfs2: read journal in large chunks to locate the head"
2019-02-14 09:52:51 -08:00
hfs
hfs: do not free node before using
2018-11-30 14:56:14 -08:00
hfsplus
hfsplus: return file attributes on statx
2019-01-04 13:13:47 -08:00
hostfs
vfs: discard ATTR_ATTR_FLAG
2018-08-17 16:20:28 -07:00
hpfs
hpfs: remove unnecessary checks on the value of r when assigning error code
2018-08-25 12:42:33 -07:00
hugetlbfs
hugetlbfs: revert "Use i_mmap_rwsem to fix page fault/truncate race"
2019-01-08 17:15:11 -08:00
isofs
Update email address
2018-09-29 22:47:48 -04:00
jbd2
jbd2: clean up indentation issue, replace spaces with tab
2018-12-04 00:20:10 -05:00
jffs2
jffs2: Fix use of uninitialized delayed_work, lockdep breakage
2018-12-02 09:20:34 +01:00
jfs
jfs: remove redundant dquot_initialize() in jfs_evict_inode()
2018-09-20 09:28:49 -05:00
kernfs
kernfs: Improve kernfs_notify() poll notification latency
2018-11-27 11:59:33 +01:00
lockd
NFS client updates for Linux 4.21
2019-01-02 16:35:23 -08:00
minix
minix_lookup: use d_splice_alias()
2018-05-22 14:27:52 -04:00
nfs
Merge branch 'fixes-v5.1-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
2019-02-20 09:09:33 -08:00
nfs_common
…
nfsd
Revert "nfsd4: return default lease period"
2019-02-14 12:33:19 -05:00
nilfs2
nilfs2: Use xa_erase_irq
2018-11-05 14:57:05 -05:00
nls
…
notify
inotify: Fix fd refcount leak in inotify_add_watch().
2019-01-02 18:28:37 +01:00
ntfs
mm: convert totalram_pages and totalhigh_pages variables to atomic
2018-12-28 12:11:47 -08:00
ocfs2
Merge branch 'akpm' (patches from Andrew)
2019-01-05 09:16:18 -08:00
omfs
omfs_lookup(): report IO errors, use d_splice_alias()
2018-05-22 14:27:58 -04:00
openpromfs
fs/openpromfs: Use of_node_name_eq for node name comparisons
2018-11-18 13:35:19 -08:00
orangefs
fs: don't open code lru_to_page()
2019-01-04 13:13:48 -08:00
overlayfs
Revert "ovl: relax permission checking on underlying layers"
2018-12-04 11:31:30 +01:00
proc
proc, oom: do not report alien mms when setting oom_score_adj
2019-02-21 09:01:00 -08:00
pstore
pstore/ram: Avoid allocation and leak of platform data
2019-01-20 14:44:52 -08:00
qnx4
qnx4_lookup: use d_splice_alias()
2018-05-22 14:27:52 -04:00
qnx6
qnx6_lookup: switch to d_splice_alias()
2018-05-22 14:27:54 -04:00
quota
quota: Lock s_umount in exclusive mode for Q_XQUOTA{ON,OFF} quotactls.
2018-12-18 18:29:15 +01:00
ramfs
…
reiserfs
reiserfs: remove workaround code for GCC 3.x
2018-10-31 08:54:14 -07:00
romfs
romfs_lookup: switch to d_splice_alias()
2018-05-22 14:27:55 -04:00
squashfs
Squashfs: Compute expected length from inode size rather than block length
2018-08-02 09:34:02 -07:00
sysfs
sysfs: convert BUG_ON to WARN_ON
2019-01-07 08:53:32 +01:00
sysv
sysv: return 'err' instead of 0 in __sysv_write_inode
2018-11-10 08:02:40 -05:00
tracefs
tracefs: Annotate tracefs_ops with __ro_after_init
2018-07-31 11:32:44 -04:00
ubifs
mm: migrate: drop unused argument of migrate_page_move_mapping()
2018-12-28 12:11:51 -08:00
udf
\n
2018-12-27 17:00:35 -08:00
ufs
fs/ufs: use ktime_get_real_seconds for sb and cg timestamps
2018-08-17 16:20:27 -07:00
xfs
xfs: set buffer ops when repair probes for btree type
2019-02-03 14:03:59 -08:00
aio.c
aio: initialize kiocb private in case any filesystems expect it.
2019-02-06 08:04:22 -07:00
anon_inodes.c
anon_inode_getfile(): switch to alloc_file_pseudo()
2018-07-12 10:04:27 -04:00
attr.c
fs: Fix attr.c kernel-doc
2018-07-03 16:44:45 -04:00
bad_inode.c
get rid of 'opened' argument of ->atomic_open() - part 3
2018-07-12 10:04:20 -04:00
binfmt_aout.c
Remove 'type' argument from access_ok() function
2019-01-03 18:57:57 -08:00
binfmt_elf_fdpic.c
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
binfmt_elf.c
signal: Distinguish between kernel_siginfo and siginfo
2018-10-03 16:47:43 +02:00
binfmt_em86.c
…
binfmt_flat.c
…
binfmt_misc.c
turn filp_clone_open() into inline wrapper for dentry_open()
2018-07-10 23:29:03 -04:00
binfmt_script.c
exec: load_script: Do not exec truncated interpreter path
2019-02-18 16:49:36 -08:00
block_dev.c
blockdev: Fix livelocks on loop device
2019-01-15 07:30:56 -07:00
buffer.c
fs: ratelimit __find_get_block_slow() failure message.
2019-02-06 12:58:56 -07:00
char_dev.c
…
compat_binfmt_elf.c
y2038: globally rename compat_time to old_time32
2018-08-27 14:48:48 +02:00
compat_ioctl.c
media updates for v4.20-rc1
2018-10-29 14:29:58 -07:00
compat.c
ncpfs: remove compat functionality
2018-06-05 19:23:26 +02:00
coredump.c
signal: Distinguish between kernel_siginfo and siginfo
2018-10-03 16:47:43 +02:00
d_path.c
…
dax.c
dax fix 4.21
2018-12-31 09:46:39 -08:00
dcache.c
fs/dcache: Track & report number of negative dentries
2019-01-30 11:02:11 -08:00
dcookies.c
…
direct-io.c
direct-io: allow direct writes to empty inodes
2019-01-22 08:26:44 -07:00
drop_caches.c
fs/drop_caches.c: avoid softlockups in drop_pagecache_sb()
2019-02-01 15:46:24 -08:00
eventfd.c
Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL
2018-06-28 10:40:47 -07:00
eventpoll.c
Merge branch 'akpm' (patches from Andrew)
2019-01-05 09:16:18 -08:00
exec.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-01-05 13:18:59 -08:00
fcntl.c
signal: Distinguish between kernel_siginfo and siginfo
2018-10-03 16:47:43 +02:00
fhandle.c
…
file_table.c
mm: convert totalram_pages and totalhigh_pages variables to atomic
2018-12-28 12:11:47 -08:00
file.c
Char/Misc driver patches for 4.21-rc1
2018-12-28 20:54:57 -08:00
filesystems.c
…
fs_pin.c
…
fs_struct.c
…
fs-writeback.c
writeback: synchronize sync(2) against cgroup writeback membership switches
2019-01-22 14:39:38 -07:00
inode.c
Revert "mm: don't reclaim inodes with many attached pages"
2019-02-12 16:33:18 -08:00
internal.h
overlayfs update for 4.19
2018-08-21 18:19:09 -07:00
ioctl.c
Remove 'type' argument from access_ok() function
2019-01-03 18:57:57 -08:00
iomap.c
iomap: fix a use after free in iomap_dio_rw
2019-01-27 08:47:42 -08:00
Kconfig
autofs: remove left-over autofs4 stubs
2018-06-11 08:22:34 -07:00
Kconfig.binfmt
kconfig: move the "Executable file formats" menu to fs/Kconfig.binfmt
2018-08-02 08:06:55 +09:00
libfs.c
…
locks.c
locks: fix error in locks_move_blocks()
2019-01-02 20:14:50 -05:00
Makefile
autofs: remove left-over autofs4 stubs
2018-06-11 08:22:34 -07:00
mbcache.c
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
mount.h
…
mpage.c
mpage: mpage_readpages() should submit IO as read-ahead
2018-08-17 16:20:29 -07:00
namei.c
Revert "vfs: Allow userns root to call mknod on owned filesystems."
2018-12-22 14:18:34 -08:00
namespace.c
Merge branch 'mount.part1' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-01-05 13:25:58 -08:00
no-block.c
…
nsfs.c
…
open.c
overlayfs update for 4.19
2018-08-21 18:19:09 -07:00
pipe.c
Merge branch 'work.open3' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2018-08-13 19:58:36 -07:00
pnode.c
vfs: Suppress MS_* flag defs within the kernel unless explicitly enabled
2018-12-20 16:32:56 +00:00
pnode.h
…
posix_acl.c
…
proc_namespace.c
…
read_write.c
Remove 'type' argument from access_ok() function
2019-01-03 18:57:57 -08:00
readdir.c
Remove 'type' argument from access_ok() function
2019-01-03 18:57:57 -08:00
select.c
Remove 'type' argument from access_ok() function
2019-01-03 18:57:57 -08:00
seq_file.c
fs/seq_file.c: simplify seq_file iteration code and interface
2018-08-17 16:20:28 -07:00
signalfd.c
signal: Distinguish between kernel_siginfo and siginfo
2018-10-03 16:47:43 +02:00
splice.c
splice: don't read more than available pipe space
2018-12-04 08:50:49 -08:00
stack.c
…
stat.c
y2038: Remove newstat family from default syscall set
2018-08-29 15:42:20 +02:00
statfs.c
kernel: add kcompat_sys_{f,}statfs64()
2018-07-12 14:49:48 +01:00
super.c
mount_fs: suppress MAC on MS_SUBMOUNT as well as MS_KERNMOUNT
2018-12-21 11:51:23 -05:00
sync.c
…
timerfd.c
y2038: globally rename compat_time to old_time32
2018-08-27 14:48:48 +02:00
userfaultfd.c
userfaultfd: clear flag if remap event not enabled
2018-12-28 12:11:51 -08:00
utimes.c
y2038: utimes: Rework #ifdef guards for compat syscalls
2018-08-29 15:42:23 +02:00
xattr.c
sysfs: Do not return POSIX ACL xattrs via listxattr
2018-09-18 07:30:48 -04:00