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Shijie Luo af133ade9a ext4: add cond_resched() to ext4_protect_reserved_inode 
When journal size is set too big by "mkfs.ext4 -J size=", or when
we mount a crafted image to make journal inode->i_size too big,
the loop, "while (i < num)", holds cpu too long. This could cause
soft lockup.

[  529.357541] Call trace:
[  529.357551]  dump_backtrace+0x0/0x198
[  529.357555]  show_stack+0x24/0x30
[  529.357562]  dump_stack+0xa4/0xcc
[  529.357568]  watchdog_timer_fn+0x300/0x3e8
[  529.357574]  __hrtimer_run_queues+0x114/0x358
[  529.357576]  hrtimer_interrupt+0x104/0x2d8
[  529.357580]  arch_timer_handler_virt+0x38/0x58
[  529.357584]  handle_percpu_devid_irq+0x90/0x248
[  529.357588]  generic_handle_irq+0x34/0x50
[  529.357590]  __handle_domain_irq+0x68/0xc0
[  529.357593]  gic_handle_irq+0x6c/0x150
[  529.357595]  el1_irq+0xb8/0x140
[  529.357599]  __ll_sc_atomic_add_return_acquire+0x14/0x20
[  529.357668]  ext4_map_blocks+0x64/0x5c0 [ext4]
[  529.357693]  ext4_setup_system_zone+0x330/0x458 [ext4]
[  529.357717]  ext4_fill_super+0x2170/0x2ba8 [ext4]
[  529.357722]  mount_bdev+0x1a8/0x1e8
[  529.357746]  ext4_mount+0x44/0x58 [ext4]
[  529.357748]  mount_fs+0x50/0x170
[  529.357752]  vfs_kern_mount.part.9+0x54/0x188
[  529.357755]  do_mount+0x5ac/0xd78
[  529.357758]  ksys_mount+0x9c/0x118
[  529.357760]  __arm64_sys_mount+0x28/0x38
[  529.357764]  el0_svc_common+0x78/0x130
[  529.357766]  el0_svc_handler+0x38/0x78
[  529.357769]  el0_svc+0x8/0xc
[  541.356516] watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [mount:18674]

Link: https://lore.kernel.org/r/20200211011752.29242-1-luoshijie1@huawei.com
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Shijie Luo <luoshijie1@huawei.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org
2020-02-13 11:56:26 -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: simulate various I/O and checksum errors when reading metadata
2019-12-26 11:28:31 -05:00
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: add cond_resched() to ext4_protect_reserved_inode
2020-02-13 11:56:26 -05:00
dir.c
ext4: fix checksum errors with indexed dirs
2020-02-13 11:56:19 -05:00
ext4_extents.h
ext4: make some functions static in extents.c
2020-01-17 16:24:54 -05:00
ext4_jbd2.c
ext4: uninline ext4_inode_journal_mode()
2020-01-17 16:24:52 -05:00
ext4_jbd2.h
ext4: uninline ext4_inode_journal_mode()
2020-01-17 16:24:52 -05:00
ext4.h
ext4: fix checksum errors with indexed dirs
2020-02-13 11:56:19 -05:00
extents_status.c
ext4: use percpu_counters for extent_status cache hits/misses
2019-08-28 11:19:23 -04:00
extents_status.h
ext4: fix extent_status trace points
2020-01-25 02:03:03 -05:00
extents.c
ext4: fix extent_status fragmentation for plain files
2020-01-23 12:02:15 -05:00
file.c
ext4: Optimize ext4 DIO overwrites
2019-12-26 11:57:18 -05:00
fsmap.c
ext4: fix miscellaneous sparse warnings
2019-05-12 04:49:47 -04:00
fsmap.h
ext4: fix up remaining files with SPDX cleanups
2017-12-17 22:00:59 -05:00
fsync.c
ext4: update ext4_sync_file() to not use __generic_file_fsync()
2019-11-05 11:31:40 -05:00
hash.c
ext4: fix kernel oops caused by spurious casefold flag
2019-09-03 01:43:17 -04:00
ialloc.c
ext4: simulate various I/O and checksum errors when reading metadata
2019-12-26 11:28:31 -05:00
indirect.c
ext4: remove ext4_{ind,ext}_calc_metadata_amount()
2020-01-17 16:24:54 -05:00
inline.c
ext4,jbd2: fix comment and code style
2020-01-25 02:24:53 -05:00
inode-test.c
kunit: allow kunit tests to be loaded as a module
2020-01-09 16:42:29 -07:00
inode.c
ext4: fix checksum errors with indexed dirs
2020-02-13 11:56:19 -05:00
ioctl.c
ext4: Add EXT4_IOC_FSGETXATTR/EXT4_IOC_FSSETXATTR to compat_ioctl
2020-01-17 16:24:55 -05:00
Kconfig
This merge window, we've added some performance improvements in how we
2020-01-30 15:17:05 -08:00
Makefile
kunit: allow kunit tests to be loaded as a module
2020-01-09 16:42:29 -07:00
mballoc.c
ext4: save the error code which triggered an ext4_error() in the superblock
2019-12-26 11:28:23 -05:00
mballoc.h
ext4: fix up remaining files with SPDX cleanups
2017-12-17 22:00:59 -05:00
migrate.c
ext4: Reserve revoke credits for freed blocks
2019-11-05 16:00:49 -05:00
mmp.c
ext4: don't assume that mmp_nodename/bdevname have NUL
2020-02-13 11:53:10 -05:00
move_extent.c
ext4: use jbd2_inode dirty range scoping
2019-06-20 17:26:26 -04:00
namei.c
ext4: fix checksum errors with indexed dirs
2020-02-13 11:56:19 -05:00
page-io.c
ext4: fix deadlock allocating crypto bounce page from mempool
2020-01-17 16:24:54 -05:00
readpage.c
ext4: remove unneeded check for error allocating bio_post_read_ctx
2020-01-17 16:24:54 -05:00
resize.c
ext4: drop ext4_kvmalloc()
2020-01-17 16:24:55 -05:00
super.c
ext4: fix support for inode sizes > 1024 bytes
2020-02-13 11:54:08 -05:00
symlink.c
ext4: switch to fscrypt_get_symlink()
2018-01-11 22:10:40 -05:00
sysfs.c
ext4: export information about first/last errors via /sys/fs/ext4/<dev>
2019-12-26 11:29:10 -05:00
truncate.h
ext4: handle layout changes to pinned DAX mappings
2018-07-29 17:00:22 -04:00
verity.c
fs-verity: implement readahead of Merkle tree pages
2020-01-14 13:27:32 -08:00
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: drop ext4_kvmalloc()
2020-01-17 16:24:55 -05:00
xattr.h
ext4: add extra checks to ext4_xattr_block_get()
2018-03-30 20:04:11 -04:00