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linux/fs/ext4
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Shijie Luo e94c149b8a ext4: add cond_resched() to ext4_protect_reserved_inode 
commit af133ade9a upstream.

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
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-05-20 08:15:29 +02:00
..
acl.c
ext4: Don't clear SGID when inheriting ACLs
2017-10-12 11:51:26 +02:00
acl.h
ext2/3/4: use generic posix ACL infrastructure
2014-01-25 23:58:19 -05:00
balloc.c
ext4: fix potential race between online resizing and write operations
2020-03-11 07:53:01 +01:00
bitmap.c
ext4: remove unused header files
2015-04-02 23:47:42 -04:00
block_validity.c
ext4: add cond_resched() to ext4_protect_reserved_inode
2020-05-20 08:15:29 +02:00
dir.c
ext4: fix checksum errors with indexed dirs
2020-02-28 15:42:12 +01:00
ext4_extents.h
ext4: verify the depth of extent tree in ext4_find_extent()
2018-07-11 16:26:44 +02:00
ext4_jbd2.c
ext4: fix potential use after free in __ext4_journal_stop
2015-10-17 22:57:06 -04:00
ext4_jbd2.h
ext4: fix NULL pointer dereference while journal is aborted
2019-03-27 14:13:03 +09:00
ext4.h
ext4: avoid declaring fs inconsistent due to invalid file handles
2020-05-02 17:23:18 +02:00
extents_status.c
ext4: remove trailing \n from ext4_warning/ext4_error calls
2016-04-27 01:11:21 -04:00
extents_status.h
ext4: move procfs registration code to fs/ext4/sysfs.c
2015-09-23 12:46:17 -04:00
extents.c
ext4: don't perform block validity checks on the journal inode
2020-05-02 17:23:19 +02:00
file.c
ext4: fix data corruption caused by overlapping unaligned and aligned IO
2019-05-21 18:49:01 +02:00
fsync.c
ext4: cleanup ext4_sync_parent()
2016-09-05 23:21:43 -04:00
hash.c
ext4: remove unused header files
2015-04-02 23:47:42 -04:00
ialloc.c
ext4: avoid declaring fs inconsistent due to invalid file handles
2020-05-02 17:23:18 +02:00
indirect.c
ext4: cleanup bh release code in ext4_ind_remove_space()
2019-04-05 22:29:04 +02:00
inline.c
ext4: set error return correctly when ext4_htree_store_dirent fails
2020-01-29 10:24:29 +01:00
inode.c
ext4: fix special inode number checks in __ext4_iget()
2020-05-05 19:14:29 +02:00
ioctl.c
ext4: avoid declaring fs inconsistent due to invalid file handles
2020-05-02 17:23:18 +02:00
Kconfig
ext4 crypto: migrate into vfs's crypto engine
2016-07-10 14:01:03 -04:00
Makefile
ext4 crypto: migrate into vfs's crypto engine
2016-07-10 14:01:03 -04:00
mballoc.c
ext4: convert BUG_ON's to WARN_ON's in mballoc.c
2020-05-02 17:23:18 +02:00
mballoc.h
ext4: add missing KERN_CONT to a few more debugging uses
2016-10-15 09:57:31 -04:00
migrate.c
ext4: fix race between writepages and enabling EXT4_EXTENTS_FL
2020-02-28 15:42:52 +01:00
mmp.c
ext4: don't assume that mmp_nodename/bdevname have NUL
2020-02-28 15:42:11 +01:00
move_extent.c
ext4: fix argument checking in EXT4_IOC_MOVE_EXT
2018-11-13 11:16:52 -08:00
namei.c
ext4: avoid declaring fs inconsistent due to invalid file handles
2020-05-02 17:23:18 +02:00
page-io.c
ext4: fix deadlock allocating crypto bounce page from mempool
2020-02-14 16:31:07 -05:00
readpage.c
Merge branch 'akpm' (patches from Andrew)
2016-07-26 19:55:54 -07:00
resize.c
ext4: avoid declaring fs inconsistent due to invalid file handles
2020-05-02 17:23:18 +02:00
super.c
ext4: check for non-zero journal inum in ext4_calculate_overhead
2020-05-02 17:23:19 +02:00
symlink.c
Merge branch 'work.xattr' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-10-10 17:11:50 -07:00
sysfs.c
ext4: sysfs: print ext4_super_block fields as little-endian
2018-09-05 09:20:06 +02:00
truncate.h
ext4: fix races between page faults and hole punching
2015-12-07 14:28:03 -05:00
xattr_security.c
switch xattr_handler->set() to passing dentry and inode separately
2016-05-27 15:39:43 -04:00
xattr_trusted.c
switch xattr_handler->set() to passing dentry and inode separately
2016-05-27 15:39:43 -04:00
xattr_user.c
switch xattr_handler->set() to passing dentry and inode separately
2016-05-27 15:39:43 -04:00
xattr.c
ext4: include terminating u32 in size of xattr entries when expanding inodes
2019-01-09 16:16:43 +01:00
xattr.h
ext4: fix deadlock between inline_data and ext4_expand_extra_isize_ea()
2017-03-12 06:41:41 +01:00