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Ryusuke Konishi a16731fa1b nilfs2: fix shift-out-of-bounds due to too large exponent of block size
[ Upstream commit ebeccaaef67a4895d2496ab8d9c2fb8d89201211 ]

If field s_log_block_size of superblock data is corrupted and too large,
init_nilfs() and load_nilfs() still can trigger a shift-out-of-bounds
warning followed by a kernel panic (if panic_on_warn is set):

 shift exponent 38973 is too large for 32-bit type 'int'
 Call Trace:
  <TASK>
  dump_stack_lvl+0xcd/0x134
  ubsan_epilogue+0xb/0x50
  __ubsan_handle_shift_out_of_bounds.cold.12+0x17b/0x1f5
  init_nilfs.cold.11+0x18/0x1d [nilfs2]
  nilfs_mount+0x9b5/0x12b0 [nilfs2]
  ...

This fixes the issue by adding and using a new helper function for getting
block size with sanity check.

Link: https://lkml.kernel.org/r/20221027044306.42774-3-konishi.ryusuke@gmail.com
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@gmail.com>
Tested-by: Ryusuke Konishi <konishi.ryusuke@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-12-31 13:32:58 +01:00
arch arm64: dts: qcom: sm6350: Add apps_smmu with streamID to SDHCI 1/2 nodes 2022-12-31 13:32:57 +01:00
block block, bfq: fix possible uaf for 'bfqq->bic' 2022-12-31 13:32:53 +01:00
certs certs: make system keyring depend on built-in x509 parser 2022-09-24 04:31:18 +09:00
crypto crypto: tcrypt - Fix multibuffer skcipher speed test mem leak 2022-12-31 13:32:34 +01:00
Documentation dt-bindings: mfd: qcom,spmi-pmic: Drop PWM reg dependency 2022-12-31 13:32:52 +01:00
drivers ACPI: video: Add force_native quirk for Sony Vaio VPCY11S1E 2022-12-31 13:32:58 +01:00
fs nilfs2: fix shift-out-of-bounds due to too large exponent of block size 2022-12-31 13:32:58 +01:00
include video: hyperv_fb: Avoid taking busy spinlock on panic path 2022-12-31 13:32:56 +01:00
init init/Kconfig: fix CC_HAS_ASM_GOTO_TIED_OUTPUT test with dash 2022-11-22 22:42:38 +09:00
io_uring io_uring: Fix a null-ptr-deref in io_tctx_exit_cb() 2022-12-07 06:45:20 -07:00
ipc ipc: fix memory leak in init_mqueue_fs() 2022-12-31 13:32:01 +01:00
kernel rcu: Fix __this_cpu_read() lockdep warning in rcu_force_quiescent_state() 2022-12-31 13:32:56 +01:00
lib test_firmware: fix memory leak in test_firmware_init() 2022-12-31 13:32:40 +01:00
LICENSES LICENSES/LGPL-2.1: Add LGPL-2.1-or-later as valid identifiers 2021-12-16 14:33:10 +01:00
mm 9 hotfixes. 6 for MM, 3 for other areas. Four of these patches address 2022-12-10 17:10:52 -08:00
net mctp: Remove device type check at unregister 2022-12-31 13:32:56 +01:00
rust Kbuild: add Rust support 2022-09-28 09:02:20 +02:00
samples samples: vfio-mdev: Fix missing pci_disable_device() in mdpy_fb_probe() 2022-12-31 13:32:42 +01:00
scripts - Handle different output of readelf on different distros running 2022-11-27 12:08:17 -08:00
security apparmor: Fix memleak in alloc_ns() 2022-12-31 13:32:31 +01:00
sound ALSA: mts64: fix possible null-ptr-defer in snd_mts64_interrupt 2022-12-31 13:32:22 +01:00
tools selftests: devlink: fix the fd redirect in dummy_reporter_test 2022-12-31 13:32:55 +01:00
usr usr/gen_init_cpio.c: remove unnecessary -1 values from int file 2022-10-03 14:21:44 -07:00
virt Merge branch 'kvm-dwmw2-fixes' into HEAD 2022-11-23 18:59:45 -05:00
.clang-format inet: ping: use hlist_nulls rcu iterator during lookup 2022-12-01 12:42:46 +01:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.get_maintainer.ignore get_maintainer: add Alan to .get_maintainer.ignore 2022-08-20 15:17:44 -07:00
.gitattributes .gitattributes: use 'dts' diff driver for dts files 2019-12-04 19:44:11 -08:00
.gitignore Kbuild: add Rust support 2022-09-28 09:02:20 +02:00
.mailmap 9 hotfixes. 6 for MM, 3 for other areas. Four of these patches address 2022-12-10 17:10:52 -08:00
.rustfmt.toml rust: add .rustfmt.toml 2022-09-28 09:02:20 +02:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: Remove Michal Marek from Kbuild maintainers 2022-11-16 14:53:00 +09:00
Kbuild Kbuild updates for v6.1 2022-10-10 12:00:45 -07:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS 9 hotfixes. 6 for MM, 3 for other areas. Four of these patches address 2022-12-10 17:10:52 -08:00
Makefile Linux 6.1.1 2022-12-21 17:48:12 +01:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

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.