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Zhihao Cheng 7fcbc41d76 ubifs: ubifs_writepage: Mark page dirty after writing inode failed [ Upstream commit `fb8bc4c74a` ] There are two states for ubifs writing pages: 1. Dirty, Private 2. Not Dirty, Not Private There is a third possibility which maybe related to [1] that page is private but not dirty caused by following process: PA lock(page) ubifs_write_end attach_page_private // set Private __set_page_dirty_nobuffers // set Dirty unlock(page) write_cache_pages lock(page) clear_page_dirty_for_io(page) // clear Dirty ubifs_writepage write_inode // fail, goto out, following codes are not executed // do_writepage // set_page_writeback // set Writeback // detach_page_private // clear Private // end_page_writeback // clear Writeback out: unlock(page) // Private, Not Dirty PB ksys_fadvise64_64 generic_fadvise invalidate_inode_page // page is neither Dirty nor Writeback invalidate_complete_page // page_has_private is true try_to_release_page ubifs_releasepage ubifs_assert(c, 0) !!! Then we may get following assertion failed: UBIFS error (ubi0:0 pid 1492): ubifs_assert_failed [ubifs]: UBIFS assert failed: 0, in fs/ubifs/file.c:1499 UBIFS warning (ubi0:0 pid 1492): ubifs_ro_mode [ubifs]: switched to read-only mode, error -22 CPU: 2 PID: 1492 Comm: aa Not tainted 5.16.0-rc2-00012-g7bb767dee0ba-dirty Call Trace: dump_stack+0x13/0x1b ubifs_ro_mode+0x54/0x60 [ubifs] ubifs_assert_failed+0x4b/0x80 [ubifs] ubifs_releasepage+0x7e/0x1e0 [ubifs] try_to_release_page+0x57/0xe0 invalidate_inode_page+0xfb/0x130 invalidate_mapping_pagevec+0x12/0x20 generic_fadvise+0x303/0x3c0 vfs_fadvise+0x35/0x40 ksys_fadvise64_64+0x4c/0xb0 Jump [2] to find a reproducer. [1] https://linux-mtd.infradead.narkive.com/NQoBeT1u/patch-rfc-ubifs-fix-assert-failed-in-ubifs-set-page-dirty [2] https://bugzilla.kernel.org/show_bug.cgi?id=215357 Fixes: `1e51764a3c` ("UBIFS: add new flash file system") Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com> Signed-off-by: Richard Weinberger <richard@nod.at> Signed-off-by: Sasha Levin <sashal@kernel.org>		2023-03-11 16:44:10 +01:00
arch	um: vector: Fix memory leak in vector_config	2023-03-11 16:44:08 +01:00
block	blk-iocost: fix divide by 0 error in calc_lcoefs()	2023-03-11 16:43:54 +01:00
certs	certs/blacklist_hashes.c: fix const confusion in certs blacklist	2022-06-22 14:11:22 +02:00
crypto	crypto: rsa-pkcs1pad - Use akcipher_request_complete	2023-03-11 16:43:41 +01:00
Documentation	mm: memcontrol: deprecate charge moving	2023-03-11 16:44:05 +01:00
drivers	ubi: Fix possible null-ptr-deref in ubi_free_volume()	2023-03-11 16:44:10 +01:00
fs	ubifs: ubifs_writepage: Mark page dirty after writing inode failed	2023-03-11 16:44:10 +01:00
include	ima: Align ima_file_mmap() parameters with mmap_file LSM hook	2023-03-11 16:44:02 +01:00
init	init/Kconfig: fix CC_HAS_ASM_GOTO_TIED_OUTPUT test with dash	2022-12-08 11:22:59 +01:00
ipc	ipc/sem: Fix dangling sem_array access in semtimedop race	2022-12-08 11:23:06 +01:00
kernel	irqdomain: Drop bogus fwspec-mapping error handling	2023-03-11 16:44:03 +01:00
lib	lib/mpi: Fix buffer overrun when SG is too long	2023-03-11 16:43:38 +01:00
LICENSES	LICENSES: Rename other to deprecated	2019-05-03 06:34:32 -06:00
mm	mm/thp: check and bail out if page in deferred queue already	2023-03-11 16:44:05 +01:00
net	net/sched: Retire tcindex classifier	2023-03-11 16:44:07 +01:00
samples	samples: vfio-mdev: Fix missing pci_disable_device() in mdpy_fb_probe()	2023-01-18 11:41:26 +01:00
scripts	ftrace/scripts: Update the instructions for ftrace-bisect.sh	2023-02-06 07:52:44 +01:00
security	ima: Align ima_file_mmap() parameters with mmap_file LSM hook	2023-03-11 16:44:02 +01:00
sound	ALSA: hda/realtek: Add quirk for HP EliteDesk 800 G6 Tower PC	2023-03-11 16:44:03 +01:00
tools	ktest.pl: Add RUN_TIMEOUT option with default unlimited	2023-03-11 16:44:05 +01:00
usr	initramfs: restore default compression behavior	2020-04-08 09:08:38 +02:00
virt	KVM: Destroy target device if coalesced MMIO unregistration fails	2023-03-11 16:44:01 +01:00
.clang-format	clang-format: Update with the latest for_each macro list	2019-08-31 10:00:51 +02:00
.cocciconfig
.get_maintainer.ignore	Opt out of scripts/get_maintainer.pl	2019-05-16 10:53:40 -07:00
.gitattributes
.gitignore	Modules updates for v5.4	2019-09-22 10:34:46 -07:00
.mailmap	ARM: SoC fixes	2019-11-10 13:41:59 -08:00
COPYING
CREDITS	MAINTAINERS: Remove Simon as Renesas SoC Co-Maintainer	2019-10-10 08:12:51 -07:00
Kbuild	kbuild: do not descend to ./Kbuild when cleaning	2019-08-21 21:03:58 +09:00
Kconfig	docs: kbuild: convert docs to ReST and rename to *.rst	2019-06-14 14:21:21 -06:00
MAINTAINERS	net/phy/mdio-i2c: Move header file to include/linux/mdio	2023-02-06 07:52:46 +01:00
Makefile	kbuild: Port silent mode detection to future gnu make.	2023-03-11 16:44:07 +01:00
README	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -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.

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.