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Georg Ottinger 035bc86fbf ext2: fix datatype of block number in ext2_xattr_set2() 
[ Upstream commit e880763484 ]

I run a small server that uses external hard drives for backups. The
backup software I use uses ext2 filesystems with 4KiB block size and
the server is running SELinux and therefore relies on xattr. I recently
upgraded the hard drives from 4TB to 12TB models. I noticed that after
transferring some TBs I got a filesystem error "Freeing blocks not in
datazone - block = 18446744071529317386, count = 1" and the backup
process stopped. Trying to fix the fs with e2fsck resulted in a
completely corrupted fs. The error probably came from ext2_free_blocks(),
and because of the large number 18e19 this problem immediately looked
like some kind of integer overflow. Whereas the 4TB fs was about 1e9
blocks, the new 12TB is about 3e9 blocks. So, searching the ext2 code,
I came across the line in fs/ext2/xattr.c:745 where ext2_new_block()
is called and the resulting block number is stored in the variable block
as an int datatype. If a block with a block number greater than
INT32_MAX is returned, this variable overflows and the call to
sb_getblk() at line fs/ext2/xattr.c:750 fails, then the call to
ext2_free_blocks() produces the error.

Signed-off-by: Georg Ottinger <g.ottinger@gmx.at>
Signed-off-by: Jan Kara <jack@suse.cz>
Message-Id: <20230815100340.22121-1-g.ottinger@gmx.at>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-09-23 11:11:05 +02:00
arch arm64: dts: qcom: sm8250-edo: correct ramoops pmsg-size 2023-09-23 11:11:03 +02:00
block blk-throttle: consider 'carryover_ios/bytes' in throtl_trim_slice() 2023-09-19 12:28:00 +02:00
certs certs: Fix build error when PKCS#11 URI contains semicolon 2023-02-09 11:28:11 +01:00
crypto crypto: lrw,xts - Replace strlcpy with strscpy 2023-09-23 11:11:01 +02:00
Documentation perf/smmuv3: Enable HiSilicon Erratum 162001900 quirk for HIP08/09 2023-09-23 11:11:00 +02:00
drivers md: raid1: fix potential OOB in raid1_remove_disk() 2023-09-23 11:11:05 +02:00
fs ext2: fix datatype of block number in ext2_xattr_set2() 2023-09-23 11:11:05 +02:00
include netfilter: ebtables: fix fortify warnings in size_entry_mwt() 2023-09-23 11:11:03 +02:00
init sched/psi: Select KERNFS as needed 2023-09-13 09:42:28 +02:00
io_uring io_uring: Don't set affinity on a dying sqpoll thread 2023-09-19 12:27:54 +02:00
ipc ipc: fix memory leak in init_mqueue_fs() 2022-12-31 13:32:01 +01:00
kernel scftorture: Forgive memory-allocation failure if KASAN 2023-09-23 11:11:00 +02:00
lib crypto: lib/mpi - avoid null pointer deref in mpi_cmp_ui() 2023-09-23 11:11:02 +02:00
LICENSES
mm Multi-gen LRU: avoid race in inc_min_seq() 2023-09-19 12:28:04 +02:00
net wifi: mac80211: check for station first in client probe 2023-09-23 11:11:03 +02:00
rust rust: allocator: Prevent mis-aligned allocation 2023-08-11 12:08:18 +02:00
samples samples/hw_breakpoint: Fix kernel BUG 'invalid opcode: 0000' 2023-09-23 11:11:04 +02:00
scripts kconfig: fix possible buffer overflow 2023-09-19 12:27:59 +02:00
security smackfs: Prevent underflow in smk_set_cipso() 2023-09-13 09:42:42 +02:00
sound ALSA: hda: intel-dsp-cfg: add LunarLake support 2023-09-23 11:11:04 +02:00
tools libbpf: Free btf_vmlinux when closing bpf_object 2023-09-23 11:11:03 +02:00
usr usr/gen_init_cpio.c: remove unnecessary -1 values from int file 2022-10-03 14:21:44 -07:00
virt kvm/vfio: ensure kvg instance stays around in kvm_vfio_group_add() 2023-09-13 09:42:46 +02:00
.clang-format inet: ping: use hlist_nulls rcu iterator during lookup 2022-12-01 12:42:46 +01:00
.cocciconfig
.get_maintainer.ignore get_maintainer: add Alan to .get_maintainer.ignore 2022-08-20 15:17:44 -07:00
.gitattributes
.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
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
MAINTAINERS devlink: move code to a dedicated directory 2023-08-30 16:11:00 +02:00
Makefile Linux 6.1.54 2023-09-19 12:28:10 +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.