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Chao Yu ca9fcbc5a5 f2fs: fix to do sanity check on free nid [ Upstream commit `626bcf2b7c` ] As Jungyeon reported in bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=203225 - Overview When mounting the attached crafted image and unmounting it, following errors are reported. Additionally, it hangs on sync after unmounting. The image is intentionally fuzzed from a normal f2fs image for testing. Compile options for F2FS are as follows. CONFIG_F2FS_FS=y CONFIG_F2FS_STAT_FS=y CONFIG_F2FS_FS_XATTR=y CONFIG_F2FS_FS_POSIX_ACL=y CONFIG_F2FS_CHECK_FS=y - Reproduces mkdir test mount -t f2fs tmp.img test touch test/t umount test sync - Messages kernel BUG at fs/f2fs/node.c:3073! RIP: 0010:f2fs_destroy_node_manager+0x2f0/0x300 Call Trace: f2fs_put_super+0xf4/0x270 generic_shutdown_super+0x62/0x110 kill_block_super+0x1c/0x50 kill_f2fs_super+0xad/0xd0 deactivate_locked_super+0x35/0x60 cleanup_mnt+0x36/0x70 task_work_run+0x75/0x90 exit_to_usermode_loop+0x93/0xa0 do_syscall_64+0xba/0xf0 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0010:f2fs_destroy_node_manager+0x2f0/0x300 NAT table is corrupted, so reserved meta/node inode ids were added into free list incorrectly, during file creation, since reserved id has cached in inode hash, so it fails the creation and preallocated nid can not be released later, result in kernel panic. To fix this issue, let's do nid boundary check during free nid loading. Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2019-06-15 11:54:04 +02:00
arch	perf/x86/intel: Allow PEBS multi-entry in watermark mode	2019-06-15 11:54:03 +02:00
block	block: sed-opal: fix IOC_OPAL_ENABLE_DISABLE_MBR	2019-05-31 06:46:24 -07:00
certs	export.h: remove VMLINUX_SYMBOL() and VMLINUX_SYMBOL_STR()	2018-08-22 23:21:44 +09:00
crypto	crypto: ccm - fix incompatibility between "ccm" and "ccm_base"	2019-05-22 07:37:43 +02:00
Documentation	doc: Cope with Sphinx logging deprecations	2019-06-09 09:17:21 +02:00
drivers	mailbox: stm32-ipcc: check invalid irq	2019-06-15 11:54:04 +02:00
firmware	kbuild: remove all dummy assignments to obj-	2017-11-18 11:46:06 +09:00
fs	f2fs: fix to do sanity check on free nid	2019-06-15 11:54:04 +02:00
include	ipv4: Define __ipv4_neigh_lookup_noref when CONFIG_INET is disabled	2019-06-11 12:20:57 +02:00
init	initramfs: free initrd memory if opening /initrd.image fails	2019-06-15 11:54:01 +02:00
ipc	ipc: prevent lockup on alloc_msg and free_msg	2019-06-15 11:54:00 +02:00
kernel	ntp: Allow TAI-UTC offset to be set to zero	2019-06-15 11:54:04 +02:00
lib	test_firmware: Use correct snprintf() limit	2019-06-11 12:20:54 +02:00
LICENSES	LICENSES: Remove CC-BY-SA-4.0 license text	2018-10-18 11:28:50 +02:00
mm	mm/slab.c: fix an infinite loop in leaks_show()	2019-06-15 11:54:01 +02:00
net	ethtool: check the return value of get_regs_len	2019-06-11 12:20:57 +02:00
samples	samples: mei: use /dev/mei0 instead of /dev/mei	2019-02-15 08:10:11 +01:00
scripts	gcc-plugins: Fix build failures under Darwin host	2019-06-09 09:17:22 +02:00
security	evm: check hash algorithm passed to init_desc()	2019-06-09 09:17:21 +02:00
sound	ALSA: hda/realtek - Improve the headset mic for Acer Aspire laptops	2019-06-09 09:17:17 +02:00
tools	objtool: Don't use ignore flag for fake jumps	2019-06-15 11:54:03 +02:00
usr	initramfs: move gen_initramfs_list.sh from scripts/ to usr/	2018-08-22 23:21:44 +09:00
virt	KVM: s390: Do not report unusabled IDs via KVM_CAP_MAX_VCPU_ID	2019-06-09 09:17:18 +02:00
.clang-format	clang-format: Set IndentWrappedFunctionNames false	2018-08-01 18:38:51 +02:00
.cocciconfig
.get_maintainer.ignore
.gitattributes	.gitattributes: set git diff driver for C source code files	2016-10-07 18:46:30 -07:00
.gitignore	Kbuild updates for v4.17 (2nd)	2018-04-15 17:21:30 -07:00
.mailmap	libnvdimm-for-4.19_misc	2018-08-25 18:13:10 -07:00
COPYING	COPYING: use the new text with points to the license files	2018-03-23 12:41:45 -06:00
CREDITS	9p: remove Ron Minnich from MAINTAINERS	2018-08-17 16:20:26 -07:00
Kbuild	Kbuild updates for v4.15	2017-11-17 17:45:29 -08:00
Kconfig	kconfig: move the "Executable file formats" menu to fs/Kconfig.binfmt	2018-08-02 08:06:55 +09:00
MAINTAINERS	platform/x86: Add Intel AtomISP2 dummy / power-management driver	2019-04-20 09:16:02 +02:00
Makefile	Linux 4.19.50	2019-06-11 12:20:57 +02:00
README	Docs: Added a pointer to the formatted docs to README	2018-03-21 09:02:53 -06:00

README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.