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332d9f14c1
android_kernel_samsung_a7y1.../fs
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Shijie Luo 332d9f14c1 ext4: add cond_resched() to __ext4_find_entry() 
commit 9424ef56e13a1f14c57ea161eed3ecfdc7b2770e upstream.

We tested a soft lockup problem in linux 4.19 which could also
be found in linux 5.x.

When dir inode takes up a large number of blocks, and if the
directory is growing when we are searching, it's possible the
restart branch could be called many times, and the do while loop
could hold cpu a long time.

Here is the call trace in linux 4.19.

[  473.756186] Call trace:
[  473.756196]  dump_backtrace+0x0/0x198
[  473.756199]  show_stack+0x24/0x30
[  473.756205]  dump_stack+0xa4/0xcc
[  473.756210]  watchdog_timer_fn+0x300/0x3e8
[  473.756215]  __hrtimer_run_queues+0x114/0x358
[  473.756217]  hrtimer_interrupt+0x104/0x2d8
[  473.756222]  arch_timer_handler_virt+0x38/0x58
[  473.756226]  handle_percpu_devid_irq+0x90/0x248
[  473.756231]  generic_handle_irq+0x34/0x50
[  473.756234]  __handle_domain_irq+0x68/0xc0
[  473.756236]  gic_handle_irq+0x6c/0x150
[  473.756238]  el1_irq+0xb8/0x140
[  473.756286]  ext4_es_lookup_extent+0xdc/0x258 [ext4]
[  473.756310]  ext4_map_blocks+0x64/0x5c0 [ext4]
[  473.756333]  ext4_getblk+0x6c/0x1d0 [ext4]
[  473.756356]  ext4_bread_batch+0x7c/0x1f8 [ext4]
[  473.756379]  ext4_find_entry+0x124/0x3f8 [ext4]
[  473.756402]  ext4_lookup+0x8c/0x258 [ext4]
[  473.756407]  __lookup_hash+0x8c/0xe8
[  473.756411]  filename_create+0xa0/0x170
[  473.756413]  do_mkdirat+0x6c/0x140
[  473.756415]  __arm64_sys_mkdirat+0x28/0x38
[  473.756419]  el0_svc_common+0x78/0x130
[  473.756421]  el0_svc_handler+0x38/0x78
[  473.756423]  el0_svc+0x8/0xc
[  485.755156] watchdog: BUG: soft lockup - CPU#2 stuck for 22s! [tmp:5149]

Add cond_resched() to avoid soft lockup and to provide a better
system responding.

Link: https://lore.kernel.org/r/20200215080206.13293-1-luoshijie1@huawei.com
Signed-off-by: Shijie Luo <luoshijie1@huawei.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: stable@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-04-07 14:03:43 +02:00
..
9p 9p: avoid attaching writeback_fid on mmap with type PRIVATE 2020-04-07 08:07:58 +02:00
adfs fs/adfs: super: fix use-after-free bug 2020-04-06 20:26:54 +02:00
affs A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
afs A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
autofs4 autofs: fix a leak in autofs_expire_indirect() 2020-04-07 12:44:02 +02:00
befs A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
bfs A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
btrfs btrfs: print message when tree-log replay starts 2020-04-07 13:55:27 +02:00
cachefiles A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
ceph ceph: fix dentry leak in ceph_readdir_prepopulate 2020-04-07 12:35:17 +02:00
cifs cifs: fail i/o on soft mounts if sessionsetup errors out 2020-04-07 13:51:35 +02:00
coda coda: add error handling for fget 2020-04-06 20:27:22 +02:00
configfs configfs: fix a deadlock in configfs_symlink() 2020-04-07 11:49:08 +02:00
cramfs A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
crypto A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
debugfs debugfs: fix use-after-free on symlink traversal 2020-04-06 16:42:15 +02:00
devpts A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
dlm dlm: fix invalid cluster name warning 2020-04-07 12:45:23 +02:00
ecryptfs ecryptfs: fix a memory leak bug in ecryptfs_init_messaging() 2020-04-07 13:55:06 +02:00
efivarfs A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
efs A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
exofs A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
exportfs exportfs: fix 'passing zero to ERR_PTR()' warning 2020-04-07 13:39:20 +02:00
ext2 ext2: Adjust indentation in ext2_fill_super 2020-04-07 13:50:47 +02:00
ext4 ext4: add cond_resched() to __ext4_find_entry() 2020-04-07 14:03:43 +02:00
f2fs f2fs: fix to do sanity check on segment bitmap of LFS curseg 2020-04-07 07:36:58 +02:00
fat fat: work around race with userspace's read via blockdev while mounting 2020-04-07 07:53:48 +02:00
freevxfs A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
fscache A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
fuse fuse: verify attributes 2020-04-07 12:45:40 +02:00
gfs2 gfs2: take jdata unstuff into account in do_grow 2020-04-07 12:41:53 +02:00
hfs fs/hfs/extent.c: fix array out of bounds read of array extent 2020-04-07 12:35:57 +02:00
hfsplus hfsplus: fix return value of hfsplus_get_block() 2020-04-07 12:35:53 +02:00
hostfs A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
hpfs A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
hugetlbfs hugetlb: use same fault hash key for shared and private mappings 2020-04-06 18:15:12 +02:00
isofs A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
jbd2 jbd2: switch to use jbd2_journal_abort() when failed to submit the commit record 2020-04-07 13:57:06 +02:00
jffs2 jffs2: fix use-after-free on symlink traversal 2020-04-06 16:42:13 +02:00
jfs jfs: fix bogus variable self-initialization 2020-04-07 13:41:05 +02:00
kernfs kernfs: Fix range checks in kernfs_get_target_path 2020-04-07 12:28:12 +02:00
lockd A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
logfs A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
minix A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
ncpfs A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
nfs nfs: NFS_SWAP should depend on SWAP 2020-04-07 13:55:52 +02:00
nfs_common A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
nfsd nfsd: Return EPERM, not EACCES, in some SETATTR cases 2020-04-07 12:45:30 +02:00
nilfs2 A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
nls A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
notify A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
ntfs A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
ocfs2 ocfs2: fix a NULL pointer dereference when call ocfs2_update_inode_fsync_trans() 2020-04-07 13:57:19 +02:00
omfs A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
openpromfs A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
overlayfs Revert "ovl: modify ovl_permission() to do checks on two inodes" 2020-04-07 13:49:58 +02:00
proc mm/page_alloc.c: calculate 'available' memory in a separate function 2020-04-07 13:36:28 +02:00
pstore pstore/ram: Write new dumps to start of recycled zones 2020-04-07 13:25:10 +02:00
qnx4 A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
qnx6 A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
quota fs/quota: handle overflows of sysctl fs.quota.* and report as unsigned long 2020-04-07 13:23:11 +02:00
ramfs A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
reiserfs reiserfs: prevent NULL pointer dereference in reiserfs_insert_item() 2020-04-07 13:57:23 +02:00
romfs A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
sdcardfs A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
sdfat A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
squashfs A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
sysfs A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
sysv A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
tracefs A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
ubifs ubifs: Fix deadlock in concurrent bulk-read and writepage 2020-04-07 13:55:10 +02:00
udf udf: Fix incorrect final NOT_ALLOCATED (hole) extent length 2020-04-06 19:26:24 +02:00
ufs ufs: fix braino in ufs_get_inode_gid() for solaris UFS flavour 2020-04-06 18:14:41 +02:00
xfs xfs: Sanity check flags of Q_XQUOTARM call 2020-04-07 13:39:05 +02:00
aio.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
anon_inodes.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
attr.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
bad_inode.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
binfmt_aout.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
binfmt_elf_fdpic.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
binfmt_elf.c binfmt_elf: switch to new creds when switching to new mm 2020-04-06 14:52:46 +02:00
binfmt_em86.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
binfmt_flat.c fs/binfmt_flat.c: make load_flat_shared_library() work 2020-04-06 19:13:44 +02:00
binfmt_misc.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
binfmt_script.c exec: load_script: Do not exec truncated interpreter path 2020-04-07 09:27:31 +02:00
block_dev.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
buffer.c fs: fix guard_bio_eod to check for real EOD errors 2020-04-06 14:50:20 +02:00
char_dev.c chardev: Avoid potential use-after-free in 'chrdev_open()' 2020-04-07 13:29:29 +02:00
compat_binfmt_elf.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
compat_ioctl.c compat_ioctl: pppoe: fix PPPOEIOCSFWD handling 2020-04-06 20:28:29 +02:00
compat.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
coredump.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
dax.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
dcache.c fs/dcache: move security_d_instantiate() behind attaching dentry to inode 2020-04-07 09:57:56 +02:00
dcookies.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
direct-io.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
dlog_hook.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
drop_caches.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
eventfd.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
eventpoll.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
exec.c sched/fair: Don't free p->numa_faults with concurrent readers 2020-04-06 20:26:24 +02:00
fcntl.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
fhandle.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
file_table.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
file.c fs/file.c: initialize init_files.resize_wait 2020-04-06 14:49:46 +02:00
filesystems.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
fs_pin.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
fs_struct.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
fs-writeback.c cgroup,writeback: don't switch wbs immediately on dead wbs if the memcg is dead 2020-04-07 11:58:54 +02:00
inode.c Abort file_remove_privs() for non-reg. files 2020-04-06 19:09:43 +02:00
internal.h A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
ioctl.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
Kconfig A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
Kconfig.binfmt A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
libfs.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
locks.c locks: print unsigned ino in /proc/locks 2020-04-07 13:24:39 +02:00
Makefile A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
mbcache.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
mount.h A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
mpage.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
namei.c vfs: fix do_last() regression 2020-04-07 13:46:02 +02:00
namespace.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
no-block.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
nsfs.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
open.c access: avoid the RCU grace period for the temporary subjective credentials 2020-04-06 20:24:58 +02:00
pipe.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
pnode.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
pnode.h A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
posix_acl.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
proc_namespace.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
read_write.c fs: stream_open - opener for stream-like files so that read and write can run simultaneously without deadlock 2020-04-06 18:47:45 +02:00
readdir.c filldir[64]: remove WARN_ON_ONCE() for bad directory entries 2020-04-07 13:23:50 +02:00
select.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
seq_file.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
signalfd.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
splice.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
stack.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
stat.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
statfs.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
super.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
sync.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
timerfd.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
userfaultfd.c userfaultfd_release: always remove uffd flags and clear vm_userfaultfd_ctx 2020-04-06 21:09:04 +02:00
utimes.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
xattr.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30