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Stefan Dösinger 082d9e263a wifi: brcmfmac: Check the return value of of_property_read_string_index()
Somewhen between 6.10 and 6.11 the driver started to crash on my
MacBookPro14,3. The property doesn't exist and 'tmp' remains
uninitialized, so we pass a random pointer to devm_kstrdup().

The crash I am getting looks like this:

BUG: unable to handle page fault for address: 00007f033c669379
PF: supervisor read access in kernel mode
PF: error_code(0x0001) - permissions violation
PGD 8000000101341067 P4D 8000000101341067 PUD 101340067 PMD 1013bb067 PTE 800000010aee9025
Oops: Oops: 0001 [#1] SMP PTI
CPU: 4 UID: 0 PID: 827 Comm: (udev-worker) Not tainted 6.11.8-gentoo #1
Hardware name: Apple Inc. MacBookPro14,3/Mac-551B86E5744E2388, BIOS 529.140.2.0.0 06/23/2024
RIP: 0010:strlen+0x4/0x30
Code: f7 75 ec 31 c0 c3 cc cc cc cc 48 89 f8 c3 cc cc cc cc 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa <80> 3f 00 74 14 48 89 f8 48 83 c0 01 80 38 00 75 f7 48 29 f8 c3 cc
RSP: 0018:ffffb4aac0683ad8 EFLAGS: 00010202
RAX: 00000000ffffffea RBX: 00007f033c669379 RCX: 0000000000000001
RDX: 0000000000000cc0 RSI: 00007f033c669379 RDI: 00007f033c669379
RBP: 00000000ffffffea R08: 0000000000000000 R09: 00000000c0ba916a
R10: ffffffffffffffff R11: ffffffffb61ea260 R12: ffff91f7815b50c8
R13: 0000000000000cc0 R14: ffff91fafefffe30 R15: ffffb4aac0683b30
FS:  00007f033ccbe8c0(0000) GS:ffff91faeed00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f033c669379 CR3: 0000000107b1e004 CR4: 00000000003706f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ? __die+0x23/0x70
 ? page_fault_oops+0x149/0x4c0
 ? raw_spin_rq_lock_nested+0xe/0x20
 ? sched_balance_newidle+0x22b/0x3c0
 ? update_load_avg+0x78/0x770
 ? exc_page_fault+0x6f/0x150
 ? asm_exc_page_fault+0x26/0x30
 ? __pfx_pci_conf1_write+0x10/0x10
 ? strlen+0x4/0x30
 devm_kstrdup+0x25/0x70
 brcmf_of_probe+0x273/0x350 [brcmfmac]

Signed-off-by: Stefan Dösinger <stefan@codeweavers.com>
Acked-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://patch.msgid.link/20250106170958.3595-1-stefan@codeweavers.com
2025-01-10 14:53:04 +02:00
arch Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2025-01-03 16:29:29 -08:00
block block: avoid to reuse hctx not removed from cpuhp callback list 2024-12-18 07:25:37 -07:00
certs sign-file,extract-cert: use pkcs11 provider for OPENSSL MAJOR >= 3 2024-09-20 19:52:48 +03:00
crypto crypto: rsassa-pkcs1 - Copy source data for SG list 2024-12-10 13:34:05 +08:00
Documentation ipsec-next-2025-01-09 2025-01-10 09:15:17 +00:00
drivers wifi: brcmfmac: Check the return value of of_property_read_string_index() 2025-01-10 14:53:04 +02:00
fs for-6.13-rc6-tag 2025-01-09 10:16:45 -08:00
include ipsec-next-2025-01-09 2025-01-10 09:15:17 +00:00
init - The series "resource: A couple of cleanups" from Andy Shevchenko 2024-11-25 16:09:48 -08:00
io_uring for-6.13-rc6-tag 2025-01-09 10:16:45 -08:00
ipc - The series "resource: A couple of cleanups" from Andy Shevchenko 2024-11-25 16:09:48 -08:00
kernel Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2025-01-09 16:11:47 -08:00
lib Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2025-01-09 16:11:47 -08:00
LICENSES LICENSES: add 0BSD license text 2024-09-01 20:43:24 -07:00
mm Revert "vmstat: disable vmstat_work on vmstat_cpu_down_prep()" 2025-01-06 06:10:24 -08:00
net ipsec-next-2025-01-09 2025-01-10 09:15:17 +00:00
rust Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2025-01-09 16:11:47 -08:00
samples BPF fixes: 2024-12-06 15:07:48 -08:00
scripts Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2025-01-09 16:11:47 -08:00
security selinux/stable-6.13 PR 20250107 2025-01-07 14:49:48 -08:00
sound sound fixes for 6.13-rc6 2025-01-03 10:54:51 -08:00
tools netconsole: selftest: verify userdata entry limit 2025-01-09 18:06:36 -08:00
usr kbuild: Drop support for include/asm-<arch> in headers_check.pl 2024-12-21 11:43:17 +09:00
virt VFIO updates for v6.13 2024-11-27 12:57:03 -08:00
.clang-format clang-format: Update with v6.11-rc1's for_each macro list 2024-08-02 13:20:31 +02:00
.clippy.toml rust: enable Clippy's check-private-items 2024-10-07 21:39:57 +02:00
.cocciconfig
.editorconfig .editorconfig: remove trim_trailing_whitespace option 2024-06-13 16:47:52 +02:00
.get_maintainer.ignore MAINTAINERS: Retire Ralf Baechle 2024-11-12 15:48:59 +01:00
.gitattributes .gitattributes: set diff driver for Rust source code files 2023-05-31 17:48:25 +02:00
.gitignore Kbuild updates for v6.13 2024-11-30 13:41:50 -08:00
.mailmap mailmap: modify the entry for Mathieu Othacehe 2024-12-30 17:59:08 -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 Andy Gospodarek from bonding 2025-01-09 08:30:01 -08:00
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 netconsole: selftest: verify userdata entry limit 2025-01-09 18:06:36 -08:00
Makefile Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2025-01-09 16:11:47 -08:00
README README: Fix spelling 2024-03-18 03:36:32 -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 reStructuredText 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.