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Christoph Hellwig 23a19655fb block: initialize integrity buffer to zero before writing it to media 
[ Upstream commit 899ee2c382 ]

Metadata added by bio_integrity_prep is using plain kmalloc, which leads
to random kernel memory being written media.  For PI metadata this is
limited to the app tag that isn't used by kernel generated metadata,
but for non-PI metadata the entire buffer leaks kernel memory.

Fix this by adding the __GFP_ZERO flag to allocations for writes.

Fixes: 7ba1ba12ee ("block: Block layer data integrity support")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Kanchan Joshi <joshi.k@samsung.com>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Link: https://lore.kernel.org/r/20240613084839.1044015-2-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-08-03 08:53:20 +02:00
arch ubd: untagle discard vs write zeroes not support handling 2024-08-03 08:53:20 +02:00
block block: initialize integrity buffer to zero before writing it to media 2024-08-03 08:53:20 +02:00
certs
crypto crypto: aead,cipher - zeroize key buffer after use 2024-07-11 12:49:04 +02:00
Documentation scsi: sr: Fix unintentional arithmetic wraparound 2024-07-25 09:50:40 +02:00
drivers platform/chrome: cros_ec_debugfs: fix wrong EC message version 2024-08-03 08:53:20 +02:00
fs filelock: Fix fcntl/close race recovery compat path 2024-07-27 11:34:10 +02:00
include cachefiles: fix slab-use-after-free in fscache_withdraw_volume() 2024-07-25 09:50:57 +02:00
init
io_uring io_uring/rsrc: fix incorrect assignment of iter->nr_segs in io_import_fixed 2024-06-27 13:49:10 +02:00
ipc
kernel rcu/tasks: Fix stale task snaphot for Tasks Trace 2024-08-03 08:53:20 +02:00
lib cpumask: limit FORCE_NR_CPUS to just the UP case 2024-07-25 09:50:47 +02:00
LICENSES
mm mm: page_ref: remove folio_try_get_rcu() 2024-07-25 09:50:56 +02:00
net wifi: mac80211: disable softirqs for queued frame handling 2024-07-25 09:50:57 +02:00
rust
samples
scripts kconfig: remove wrong expr_trans_bool() 2024-07-25 09:50:44 +02:00
security ima: Avoid blocking in RCU read-side critical section 2024-07-11 12:49:18 +02:00
sound ALSA: seq: ump: Skip useless ports for static blocks 2024-07-27 11:34:10 +02:00
tools selftests/bpf: Extend tcx tests to cover late tcx_entry release 2024-07-25 09:50:56 +02:00
usr
virt KVM: Fix a data race on last_boosted_vcpu in kvm_vcpu_on_spin() 2024-06-27 13:49:11 +02:00
.clang-format
.cocciconfig
.get_maintainer.ignore
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COPYING
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Kconfig
MAINTAINERS
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.