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Chao Yu f44a25a8bf f2fs: fix to truncate preallocated blocks in f2fs_file_open() 
[ Upstream commit 298b1e4182 ]

chenyuwen reports a f2fs bug as below:

Unable to handle kernel NULL pointer dereference at virtual address 0000000000000011
 fscrypt_set_bio_crypt_ctx+0x78/0x1e8
 f2fs_grab_read_bio+0x78/0x208
 f2fs_submit_page_read+0x44/0x154
 f2fs_get_read_data_page+0x288/0x5f4
 f2fs_get_lock_data_page+0x60/0x190
 truncate_partial_data_page+0x108/0x4fc
 f2fs_do_truncate_blocks+0x344/0x5f0
 f2fs_truncate_blocks+0x6c/0x134
 f2fs_truncate+0xd8/0x200
 f2fs_iget+0x20c/0x5ac
 do_garbage_collect+0x5d0/0xf6c
 f2fs_gc+0x22c/0x6a4
 f2fs_disable_checkpoint+0xc8/0x310
 f2fs_fill_super+0x14bc/0x1764
 mount_bdev+0x1b4/0x21c
 f2fs_mount+0x20/0x30
 legacy_get_tree+0x50/0xbc
 vfs_get_tree+0x5c/0x1b0
 do_new_mount+0x298/0x4cc
 path_mount+0x33c/0x5fc
 __arm64_sys_mount+0xcc/0x15c
 invoke_syscall+0x60/0x150
 el0_svc_common+0xb8/0xf8
 do_el0_svc+0x28/0xa0
 el0_svc+0x24/0x84
 el0t_64_sync_handler+0x88/0xec

It is because inode.i_crypt_info is not initialized during below path:
- mount
 - f2fs_fill_super
  - f2fs_disable_checkpoint
   - f2fs_gc
    - f2fs_iget
     - f2fs_truncate

So, let's relocate truncation of preallocated blocks to f2fs_file_open(),
after fscrypt_file_open().

Fixes: d4dd19ec1e ("f2fs: do not expose unwritten blocks to user by DIO")
Reported-by: chenyuwen <yuwen.chen@xjmz.com>
Closes: https://lore.kernel.org/linux-kernel/20240517085327.1188515-1-yuwen.chen@xjmz.com
Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-08-03 08:54:34 +02:00
arch s390/mm: Fix VM_FAULT_HWPOISON handling in do_exception() 2024-08-03 08:54:34 +02:00
block block: fix deadlock between sd_remove & sd_release 2024-08-03 08:54:24 +02:00
certs
crypto
Documentation dt-bindings: thermal: correct thermal zone node name limit 2024-08-03 08:54:12 +02:00
drivers PCI/DPC: Fix use-after-free on concurrent DPC and hot-removal 2024-08-03 08:54:34 +02:00
fs f2fs: fix to truncate preallocated blocks in f2fs_file_open() 2024-08-03 08:54:34 +02:00
include PCI: Introduce cleanup helpers for device reference counts and locks 2024-08-03 08:54:33 +02:00
init
io_uring io_uring: tighten task exit cancellations 2024-08-03 08:54:17 +02:00
ipc
kernel watchdog/perf: properly initialize the turbo mode timestamp and rearm counter 2024-08-03 08:54:29 +02:00
lib lib/build_OID_registry: don't mention the full path of the script in output 2024-08-03 08:54:32 +02:00
LICENSES
mm mm/mglru: fix ineffective protection calculation 2024-08-03 08:54:33 +02:00
net wifi: mac80211: track capability/opmode NSS separately 2024-08-03 08:54:33 +02:00
rust
samples
scripts kbuild: Fix '-S -c' in x86 stack protector scripts 2024-08-03 08:54:24 +02:00
security task_work: s/task_work_cancel()/task_work_cancel_func()/ 2024-08-03 08:54:16 +02:00
sound ASoC: amd: yc: Support mic on Lenovo Thinkpad E16 Gen 2 2024-08-03 08:54:24 +02:00
tools selftests/sigaltstack: Fix ppc64 GCC build 2024-08-03 08:54:30 +02:00
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Makefile Linux 6.6.43 2024-07-27 11:34:11 +02:00
README

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.