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FSL SOC changes for 6.13:
- Fix a missing of_node_put() in RCPM
- Fix a missing error code on failure in CPM1 QMC
- Switch to using for_each_available_child_of_node_scoped() in CPM1 TSA
* tag 'soc_fsl-6.13-1' of https://github.com/chleroy/linux:
soc: fsl: cpm1: qmc: Set the ret error code on platform_get_irq() failure
soc: fsl: rcpm: fix missing of_node_put() in copy_ippdexpcr1_setting()
soc: fsl: cpm1: tsa: switch to for_each_available_child_of_node_scoped()
Link: https://lore.kernel.org/r/c3c4961b-fe2a-4fcc-a7a1-f8b5352e09a2@csgroup.eu
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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A previous commit changed how requests are linked in the plug structure,
but unlike the previous method, it uses a new type for it rather than
struct request. The latter is available even for !CONFIG_BLOCK, while
struct rq_list is now. Move it outside CONFIG_BLOCK.
Reported-by: Nathan Chancellor <nathan@kernel.org>
Fixes: a3396b99990d ("block: add a rq_list type")
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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The ordering in hdmi_codec_get_ch_alloc_table_idx() results in
wrong channel allocation for a number of cases, e.g. when ELD
reports FL|FR|LFE|FC|RL|RR or FL|FR|LFE|FC|RL|RR|RC|RLC|RRC:
ca_id 0x01 with speaker mask FL|FR|LFE is selected instead of
ca_id 0x03 with speaker mask FL|FR|LFE|FC for 4 channels
and
ca_id 0x04 with speaker mask FL|FR|RC gets selected instead of
ca_id 0x0b with speaker mask FL|FR|LFE|FC|RL|RR for 6 channels
Fix this by reordering the channel allocation list with most
specific speaker masks at the top.
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Signed-off-by: Christian Hewitt <christianshewitt@gmail.com>
Link: https://patch.msgid.link/20241115044344.3510979-1-christianshewitt@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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If the 'realloc' fails, the thermal zones pointer is set to NULL. This
makes all thermal zones references which were previously successfully
initialized to be lost.
[dlezcano] : Fixed indentation
Signed-off-by: zhang jiao <zhangjiao2@cmss.chinamobile.com>
Link: https://lore.kernel.org/r/20241114084039.42149-1-zhangjiao2@cmss.chinamobile.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
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In cesa/cipher.c most declarations of struct mv_cesa_op_ctx are uninitialized.
This causes one of the values in the struct to be left unitialized in later
usages.
This patch fixes it by adding initializations in the same way it is done in
cesa/hash.c.
Fixes errors discovered in coverity: 1600942, 1600939, 1600935, 1600934, 1600929, 1600927,
1600925, 1600921, 1600920, 1600919, 1600915, 1600914
Signed-off-by: Karol Przybylski <karprzy7@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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If do_cpt_init() fails, a previous dma_alloc_coherent() call needs to be
undone.
Add the needed dma_free_coherent() before returning.
Fixes: 9e2c7d99941d ("crypto: cavium - Add Support for Octeon-tx CPT Engine")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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This patch reverts commit 0fbafd06bdde938884f7326548d3df812b267c3c
("crypto: aesni - fix failing setkey for rfc4106-gcm-aesni") by
moving the aesni init function back to module_init from late_initcall.
The original patch was needed because tests were synchronous. This
is no longer the case so there is no need to postpone the registration.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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This function is part of the exposed API and should be exported.
Otherwise a modular user would fail to build, e.g., crypto/rsa.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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A hwcap feature bit is passed to cpu_has_feature, resulting in testing
for CPU_FTR_MMCRA instead of the 3.1 platform revision.
Fixes: c954b252dee9 ("crypto: powerpc/p10-aes-gcm - Register modules as SIMD")
Reported-by: Nicolai Stange <nstange@suse.com>
Signed-off-by: Michal Suchanek <msuchanek@suse.de>
Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Commit 62f8f307c80e ("powerpc/64: Remove maple platform") removes the
PPC_MAPLE config as a consequence of the platform’s removal.
The config definition of HW_RANDOM_AMD refers to this removed config option
in its dependencies.
Remove the reference to the removed config option.
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@redhat.com>
Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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The CRC-T10DIF algorithm produces a 16-bit CRC, and this is reflected in
the folding coefficients, which are also only 16 bits wide.
This means that the polynomial multiplications involving these
coefficients can be performed using 8-bit long polynomial multiplication
(8x8 -> 16) in only a few steps, and this is an instruction that is part
of the base NEON ISA, which is all most real ARMv7 cores implement. (The
64-bit PMULL instruction is part of the crypto extensions, which are
only implemented by 64-bit cores)
The final reduction is a bit more involved, but we can delegate that to
the generic CRC-T10DIF implementation after folding the entire input
into a 16 byte vector.
This results in a speedup of around 6.6x on Cortex-A72 running in 32-bit
mode. On Cortex-A8 (BeagleBone White), the results are substantially
better than that, but not sufficiently reproducible (with tcrypt) to
quote a number here.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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To allow an alternative version to be created of the PMULL based
CRC-T10DIF algorithm, turn the bulk of it into a macro, except for the
final reduction, which will only be used by the existing version.
Reviewed-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Reviewed-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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The only remaining user of the fallback implementation of 64x64
polynomial multiplication using 8x8 PMULL instructions is the final
reduction from a 16 byte vector to a 16-bit CRC.
The fallback code is complicated and messy, and this reduction has
little impact on the overall performance, so instead, let's calculate
the final CRC by passing the 16 byte vector to the generic CRC-T10DIF
implementation when running the fallback version.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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The CRC-T10DIF implementation for arm64 has a version that uses 8x8
polynomial multiplication, for cores that lack the crypto extensions,
which cover the 64x64 polynomial multiplication instruction that the
algorithm was built around.
This fallback version rather naively adopted the 64x64 polynomial
multiplication algorithm that I ported from ARM for the GHASH driver,
which needs 8 PMULL8 instructions to implement one PMULL64. This is
reasonable, given that each 8-bit vector element needs to be multiplied
with each element in the other vector, producing 8 vectors with partial
results that need to be combined to yield the correct result.
However, most PMULL64 invocations in the CRC-T10DIF code involve
multiplication by a pair of 16-bit folding coefficients, and so all the
partial results from higher order bytes will be zero, and there is no
need to calculate them to begin with.
Then, the CRC-T10DIF algorithm always XORs the output values of the
PMULL64 instructions being issued in pairs, and so there is no need to
faithfully implement each individual PMULL64 instruction, as long as
XORing the results pairwise produces the expected result.
Implementing these improvements results in a speedup of 3.3x on low-end
platforms such as Raspberry Pi 4 (Cortex-A72)
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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This is a partial revert of commit fc754c024a343b, which moved the logic
into C code which ensures that kernel mode NEON code does not hog the
CPU for too long.
This is no longer needed now that kernel mode NEON no longer disables
preemption, so we can drop this.
Reviewed-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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The ahash_init functions may return fails. The ahash_hmac_init should
not return ok when ahash_init returns error. For an example, ahash_init
will return -ENOMEM when allocation memory is error.
Fixes: 9d12ba86f818 ("crypto: brcm - Add Broadcom SPU driver")
Signed-off-by: Chen Ridong <chenridong@huawei.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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The caam_rsa_set_priv_key_form did not check for memory allocation errors.
Add the checks to the caam_rsa_set_priv_key_form functions.
Fixes: 52e26d77b8b3 ("crypto: caam - add support for RSA key form 2")
Signed-off-by: Chen Ridong <chenridong@huawei.com>
Reviewed-by: Gaurav Jain <gaurav.jain@nxp.com>
Reviewed-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Hitherto, these operations have been converted in user space to
mask-and-xor operations on one register and two immediate values, and it
is the latter which have been evaluated by the kernel. We add support
for evaluating these operations directly in kernel space on one register
and either an immediate value or a second register.
Pablo made a few changes to the original patch:
- EINVAL if NFTA_BITWISE_SREG2 is used with fast version.
- Allow _AND,_OR,_XOR with _DATA != sizeof(u32)
- Dump _SREG2 or _DATA with _AND,_OR,_XOR
Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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There are reports [0] of cases where a corrupt EFI Memory Attributes
Table leads to out of memory issues at boot because the descriptor size
and entry count in the table header are still used to reserve the entire
table in memory, even though the resulting region is gigabytes in size.
Given that the EFI Memory Attributes Table is supposed to carry up to 3
entries for each EfiRuntimeServicesCode region in the EFI memory map,
and given that there is no reason for the descriptor size used in the
table to exceed the one used in the EFI memory map, 3x the size of the
entire EFI memory map is a reasonable upper bound for the size of this
table. This means that sizes exceeding that are highly likely to be
based on corrupted data, and the table should just be ignored instead.
[0] https://bugzilla.suse.com/show_bug.cgi?id=1231465
Cc: Gregory Price <gourry@gourry.net>
Cc: Usama Arif <usamaarif642@gmail.com>
Acked-by: Jiri Slaby <jirislaby@kernel.org>
Acked-by: Breno Leitao <leitao@debian.org>
Link: https://lore.kernel.org/all/20240912155159.1951792-2-ardb+git@google.com/
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
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There is a spelling mistake in an error message literal string. Fix it.
Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Link: https://lore.kernel.org/r/20241108112509.109891-1-colin.i.king@gmail.com
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Eric Sandeen <sandeen@redhat.com> says:
This is lightly tested with the kernel tests present in ecryptfs-utils,
but it could certainly use a bit more testing and review, particularly
with invalid mount option sets.
This one is a little unique compared to other filesystems in that I
allocate both an fs context and the *sbi in .init_fs_context; the *sbi
is long-lived, and the context is only present during the initial mount.
Allocating sbi with the filesystem context means we can set options
into it directly, rather than needing to do it after parsing. And it's
particularly simple to do it this way given that there is no remount.
* patches from https://lore.kernel.org/r/20241028143359.605061-1-sandeen@redhat.com:
ecryptfs: Convert ecryptfs to use the new mount API
ecryptfs: Factor out mount option validation
Link: https://lore.kernel.org/r/20241028143359.605061-1-sandeen@redhat.com
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Convert ecryptfs to the new mount API.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Link: https://lore.kernel.org/r/20241028143359.605061-3-sandeen@redhat.com
Acked-by: Tyler Hicks <code@tyhicks.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Under the new mount API, mount options are parsed one at a time.
Any validation that examines multiple options must be done after parsing
is complete, so factor out a ecryptfs_validate_options() which can be
called separately.
To facilitate this, temporarily move the local variables that tracked
whether various options have been set in the parsing function, into the
ecryptfs_mount_crypt_stat structure so that they can be examined later.
These will be moved to a more ephemeral struct in the mount api conversion
patch to follow.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Link: https://lore.kernel.org/r/20241028143359.605061-2-sandeen@redhat.com
Acked-by: Tyler Hicks <code@tyhicks.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Amir Goldstein <amir73il@gmail.com> says:
These patches bring the NFS connectable file handles feature to
userspace servers.
They rely on Christian's and Aleksa's changes recently merged to v6.12.
The API I chose for encoding conenctable file handles is pretty
conventional (AT_HANDLE_CONNECTABLE).
open_by_handle_at(2) does not have AT_ flags argument, but also, I find
it more useful API that encoding a connectable file handle can mandate
the resolving of a connected fd, without having to opt-in for a
connected fd independently.
I chose to implemnent this by using upper bits in the handle type field
It may be that out-of-tree filesystems return a handle type with upper
bits set, but AFAIK, no in-tree filesystem does that.
I added some warnings just in case we encouter that.
I have written an fstest [1] and a man page draft [2] for the feature.
[1] https://github.com/amir73il/xfstests/commits/connectable-fh/
[2] https://github.com/amir73il/man-pages/commits/connectable-fh/
* patches from https://lore.kernel.org/r/20241011090023.655623-1-amir73il@gmail.com:
fs: open_by_handle_at() support for decoding "explicit connectable" file handles
fs: name_to_handle_at() support for "explicit connectable" file handles
fs: prepare for "explicit connectable" file handles
Link: https://lore.kernel.org/r/20241011090023.655623-1-amir73il@gmail.com
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Teach open_by_handle_at(2) about the type format of "explicit connectable"
file handles that were created using the AT_HANDLE_CONNECTABLE flag to
name_to_handle_at(2).
When decoding an "explicit connectable" file handles, name_to_handle_at(2)
should fail if it cannot open a "connected" fd with known path, which is
accessible (to capable user) from mount fd path.
Note that this does not check if the path is accessible to the calling
user, just that it is accessible wrt the mount namesapce, so if there
is no "connected" alias, or if parts of the path are hidden in the
mount namespace, open_by_handle_at(2) will return -ESTALE.
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Link: https://lore.kernel.org/r/20241011090023.655623-4-amir73il@gmail.com
Fixes: 570df4e9c23f ("ceph: snapshot nfs re-export")
Acked-by:
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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nfsd encodes "connectable" file handles for the subtree_check feature,
which can be resolved to an open file with a connected path.
So far, userspace nfs server could not make use of this functionality.
Introduce a new flag AT_HANDLE_CONNECTABLE to name_to_handle_at(2).
When used, the encoded file handle is "explicitly connectable".
The "explicitly connectable" file handle sets bits in the high 16bit of
the handle_type field, so open_by_handle_at(2) will know that it needs
to open a file with a connected path.
old kernels will now recognize the handle_type with high bits set,
so "explicitly connectable" file handles cannot be decoded by
open_by_handle_at(2) on old kernels.
The flag AT_HANDLE_CONNECTABLE is not allowed together with either
AT_HANDLE_FID or AT_EMPTY_PATH.
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Link: https://lore.kernel.org/r/20241011090023.655623-3-amir73il@gmail.com
Fixes: 570df4e9c23f ("ceph: snapshot nfs re-export")
Acked-by:
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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We would like to use the high 16bit of the handle_type field to encode
file handle traits, such as "connectable".
In preparation for this change, make sure that filesystems do not return
a handle_type value with upper bits set and that the open_by_handle_at(2)
syscall rejects these handle types.
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Link: https://lore.kernel.org/r/20241011090023.655623-2-amir73il@gmail.com
Fixes: 570df4e9c23f ("ceph: snapshot nfs re-export")
Acked-by:
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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In the next patch we add support for doing AND, OR and XOR operations
directly in the kernel, so rename some functions and an enum constant
related to mask-and-xor boolean operations.
Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Use ip4h_dscp() instead of reading iph->tos directly.
ip4h_dscp() returns a dscp_t value which is temporarily converted back
to __u8 with inet_dscp_to_dsfield(). When converting ->flowi4_tos to
dscp_t in the future, we'll only have to remove that
inet_dscp_to_dsfield() call.
Signed-off-by: Guillaume Nault <gnault@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Use ip4h_dscp() instead of reading iph->tos directly.
ip4h_dscp() returns a dscp_t value which is temporarily converted back
to __u8 with inet_dscp_to_dsfield(). When converting ->flowi4_tos to
dscp_t in the future, we'll only have to remove that
inet_dscp_to_dsfield() call.
Signed-off-by: Guillaume Nault <gnault@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Use ip4h_dscp() instead of reading iph->tos directly.
ip4h_dscp() returns a dscp_t value which is temporarily converted back
to __u8 with inet_dscp_to_dsfield(). When converting ->flowi4_tos to
dscp_t in the future, we'll only have to remove that
inet_dscp_to_dsfield() call.
Signed-off-by: Guillaume Nault <gnault@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Use ip4h_dscp()instead of reading ip_hdr()->tos directly.
ip4h_dscp() returns a dscp_t value which is temporarily converted back
to __u8 with inet_dscp_to_dsfield(). When converting ->flowi4_tos to
dscp_t in the future, we'll only have to remove that
inet_dscp_to_dsfield() call.
Also, remove the comment about the net/ip.h include file, since it's
now required for the ip4h_dscp() helper too.
Signed-off-by: Guillaume Nault <gnault@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Use ip4h_dscp()instead of reading iph->tos directly.
ip4h_dscp() returns a dscp_t value which is temporarily converted back
to __u8 with inet_dscp_to_dsfield(). When converting ->flowi4_tos to
dscp_t in the future, we'll only have to remove that
inet_dscp_to_dsfield() call.
Signed-off-by: Guillaume Nault <gnault@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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EFI zboot no longer uses LoadImage/StartImage, but subsumes the arch
code to load and start the bare metal image directly. Fix the Kconfig
description accordingly.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
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cmdline_ptr is an out parameter, which is not allocated by the function
itself, and likely points into the caller's stack.
cmdline refers to the pool allocation that should be freed when cleaning
up after a failure, so pass this instead to free_pool().
Fixes: 42c8ea3dca09 ("efi: libstub: Factor out EFI stub entrypoint ...")
Cc: <stable@vger.kernel.org>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
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Remove hard-coded strings by using the str_yes_no() helper function.
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Link: https://lore.kernel.org/r/20241114224649.57946-4-thorsten.blum@linux.dev
Signed-off-by: Michal Simek <michal.simek@amd.com>
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into next
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into next
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git://git.kernel.org/pub/scm/linux/kernel/git/will/linux into arm/smmu
Arm SMMU updates for 6.13
- SMMUv2:
* Return -EPROBE_DEFER for client devices probing before their SMMU.
* Devicetree binding updates for Qualcomm MMU-500 implementations.
- SMMUv3:
* Minor fixes and cleanup for NVIDIA's virtual command queue driver.
- IO-PGTable:
* Fix indexing of concatenated PGDs and extend selftest coverage.
* Remove unused block-splitting support.
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Stop using struct fd to return a real file from ovl_real_fdget(),
because we no longer return a temporary file object and the callers
always get a borrowed file reference.
Rename the helper to ovl_real_file(), return a borrowed reference of
the real file that is referenced from the overlayfs file or an error.
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
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Stop using struct fd to return a real file from ovl_real_fdget_path(),
because we no longer return a temporary file object and the callers
always get a borrowed file reference.
Rename the helper to ovl_real_file_path(), return a borrowed reference
of the real file that is referenced from the overlayfs file or an error.
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
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When an overlayfs file is opened as lower and then the file is copied up,
every operation on the overlayfs open file will open a temporary backing
file to the upper dentry and close it at the end of the operation.
Store the upper real file along side the original (lower) real file in
ovl_file instead of opening a temporary upper file on every operation.
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
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Instead of using ->private_data to point at realfile directly, so
that we can add more context per ovl open file.
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
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ovl_fsync() with !datasync opens a backing file from the top most dentry
in the stack, checks if this dentry is non-upper and skips the fsync.
In case of an overlay dentry stack with lower data and lower metadata
above it, but without an upper metadata above it, the backing file is
opened from the top most lower metadata dentry and never used.
Refactor the helper ovl_real_fdget_meta() into ovl_real_fdget_path() and
open code the checks for non-upper inode in ovl_fsync(), so in that case
we can avoid the unneeded backing file open.
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
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Use override_creds_light() in ovl_override_creds() and
revert_creds_light() in ovl_revert_creds().
The _light() functions do not change the 'usage' of the credentials in
question, as they refer to the credentials associated with the
mounter, which have a longer lifetime.
In ovl_setup_cred_for_create(), do not need to modify the mounter
credentials (returned by override_creds_light()) 'usage' counter.
Add a warning to verify that we are indeed working with the mounter
credentials (stored in the superblock). Failure in this assumption
means that creds may leak.
Suggested-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@intel.com>
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
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This avoids spurious message:
(gdb) lx-symbols
loading vmlinux
No source file named kernel/module/main.c.
Link: https://lkml.kernel.org/r/Zy5ALByQtpO-ddh4@Z926fQmE5jqhFMgp6
Signed-off-by: Etienne Buira <etienne.buira@free.fr>
Cc: Andrew Ballance <andrewjballance@gmail.com>
Cc: Kieran Bingham <kbingham@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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cma_init_reserved_mem() checks base and size alignment with
CMA_MIN_ALIGNMENT_BYTES. However, some users might call this during early
boot when pageblock_order is 0. That means if base and size does not have
pageblock_order alignment, it can cause functional failures during cma
activate area.
So let's enforce pageblock_order to be non-zero during
cma_init_reserved_mem() to catch such wrong usages.
1. This was seen with fadump on PowerPC which was calling
cma_init_reserved_mem() before the pageblock_order was initialized.
This is now fixed in the fadump on PowerPC itself. The details of that
can be found in the patch including the userspace-visible effect of the
issue [1].
2. However it was also decided that we should add a stronger
enforcement check within cma_init_reserved_mem() to catch such wrong
usages [2]. Hence this patch. This is ok to be in -next and there is
no "Fixes" tag required for this patch.
[1]: https://lore.kernel.org/all/3ae208e48c0d9cefe53d2dc4f593388067405b7d.1729146153.git.ritesh.list@gmail.com/
[2]: https://lore.kernel.org/all/83eb128e-4f06-4725-a843-a4563f246a44@redhat.com/
Link: https://lkml.kernel.org/r/e274344b44d5f80fa54c52f530387257fe99ec65.1731505681.git.ritesh.list@gmail.com
Signed-off-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Acked-by: David Hildenbrand <david@redhat.com>
Acked-by: Zi Yan <ziy@nvidia.com>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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Faults from copy_from_kernel_nofault() need to be handled by fixup table
and should not be handled by kfence. Otherwise while reading /proc/kcore
which uses copy_from_kernel_nofault(), kfence can generate false
negatives. This can happen when /proc/kcore ends up reading an unmapped
address from kfence pool.
Let's add a testcase to cover this case.
Link: https://lkml.kernel.org/r/210e561f7845697a32de44b643393890f180069f.1729272697.git.ritesh.list@gmail.com
Signed-off-by: Nirjhar Roy <nirjhar@linux.ibm.com>
Co-developed-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Signed-off-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Tested-by: Marco Elver <elver@google.com>
Reviewed-by: Marco Elver <elver@google.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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LTP reported a NULL pointer dereference as followed:
CPU: 7 UID: 0 PID: 5995 Comm: cat Kdump: loaded Not tainted 6.12.0-rc6+ #3
Hardware name: QEMU KVM Virtual Machine, BIOS 0.0.0 02/06/2015
pstate: 40400005 (nZcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : __pi_strcmp+0x24/0x140
lr : zcomp_available_show+0x60/0x100 [zram]
sp : ffff800088b93b90
x29: ffff800088b93b90 x28: 0000000000000001 x27: 0000000000400cc0
x26: 0000000000000ffe x25: ffff80007b3e2388 x24: 0000000000000000
x23: ffff80007b3e2390 x22: ffff0004041a9000 x21: ffff80007b3e2900
x20: 0000000000000000 x19: 0000000000000000 x18: 0000000000000000
x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000
x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000000000
x11: 0000000000000000 x10: ffff80007b3e2900 x9 : ffff80007b3cb280
x8 : 0101010101010101 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000040 x4 : 0000000000000000 x3 : 00656c722d6f7a6c
x2 : 0000000000000000 x1 : ffff80007b3e2900 x0 : 0000000000000000
Call trace:
__pi_strcmp+0x24/0x140
comp_algorithm_show+0x40/0x70 [zram]
dev_attr_show+0x28/0x80
sysfs_kf_seq_show+0x90/0x140
kernfs_seq_show+0x34/0x48
seq_read_iter+0x1d4/0x4e8
kernfs_fop_read_iter+0x40/0x58
new_sync_read+0x9c/0x168
vfs_read+0x1a8/0x1f8
ksys_read+0x74/0x108
__arm64_sys_read+0x24/0x38
invoke_syscall+0x50/0x120
el0_svc_common.constprop.0+0xc8/0xf0
do_el0_svc+0x24/0x38
el0_svc+0x38/0x138
el0t_64_sync_handler+0xc0/0xc8
el0t_64_sync+0x188/0x190
The zram->comp_algs[ZRAM_PRIMARY_COMP] can be NULL in zram_add() if
comp_algorithm_set() has not been called. User can access the zram device
by sysfs after device_add_disk(), so there is a time window to trigger the
NULL pointer dereference. Move it ahead device_add_disk() to make sure
when user can access the zram device, it is ready. comp_algorithm_set()
is protected by zram->init_lock in other places and no such problem.
Link: https://lkml.kernel.org/r/20241108100147.3776123-1-liushixin2@huawei.com
Fixes: 7ac07a26dea7 ("zram: preparation for multi-zcomp support")
Signed-off-by: Liu Shixin <liushixin2@huawei.com>
Reviewed-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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