From 4617721c502b2ddaa4e324e86da4997edf738fa5 Mon Sep 17 00:00:00 2001 From: Steven Rostedt Date: Wed, 2 Sep 2026 09:55:01 -0400 Subject: ftrace: Synchronize the initialization of ftrace_ops There's some internal state that ftrace_ops needs to have set, but since it can be declared outside of the ftrace.c code, it calls ftrace_ops_init() on the ops in every global function. The issue is that if two tasks call it on the same ops at the same time it is possible to have the initialization of one corrupt the initialization of the other call. Create a ops_mutex to use to synchronize every initialization of the ftrace_ops. The mutex is taken within checking the ftrace_ops flag that states it was initializied but the flag is checked again after the mutex has been taken. Checking first outside the mutex allows it to shortcut having to take the mutex. But then the check needs to be done again after the mute is taken in case of races. Cc: stable@vger.kernel.org Link: https://patch.msgid.link/20260902095501.6b59af20@gandalf.local.home Fixes: f04f24fb7e48d ("ftrace, kprobes: Fix a deadlock on ftrace_regex_lock") Reported-by: sashiko-bot@kernel.org Close: https://lore.kernel.org/all/20260829025528.49A831F000E9@smtp.kernel.org/ Signed-off-by: Steven Rostedt --- rust/bindgen_parameters | 73 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 73 insertions(+) create mode 100644 rust/bindgen_parameters (limited to 'rust/bindgen_parameters') diff --git a/rust/bindgen_parameters b/rust/bindgen_parameters new file mode 100644 index 000000000..8402b0c93 --- /dev/null +++ b/rust/bindgen_parameters @@ -0,0 +1,73 @@ +# SPDX-License-Identifier: GPL-2.0 + +# We want to map these types to `isize`/`usize` manually, instead of +# define them as `int`/`long` depending on platform bitwidth. +--blocklist-type __kernel_s?size_t +--blocklist-type __kernel_ptrdiff_t + +--opaque-type xregs_state +--opaque-type desc_struct +--opaque-type arch_lbr_state +--opaque-type local_apic + +# Packed type cannot transitively contain a `#[repr(align)]` type. +--opaque-type alt_instr +--opaque-type x86_msi_data +--opaque-type x86_msi_addr_lo +# s390-only: same packed/align issue as above (E0588). +--opaque-type lowcore +--opaque-type tod_clock +--opaque-type tpi_info +--opaque-type uv_cb.* +--opaque-type uv_secret.* +--opaque-type zpci_fib + +# If SMP is disabled, `arch_spinlock_t` is defined as a ZST which triggers a Rust +# warning. We don't need to peek into it anyway. +--opaque-type spinlock + +# enums that appear in indirect function calls should specify a cfi type +--newtype-enum lru_status +--with-attribute-custom-enum=lru_status='#[cfi_encoding="10lru_status"]' + +# `seccomp`'s comment gets understood as a doctest +--no-doc-comments + +# These functions use the `__preserve_most` calling convention, which neither bindgen +# nor Rust currently understand, and which Clang currently declares to be unstable. +--blocklist-function __list_.*_report + +# These constants are sometimes not recognized by bindgen depending on config. +# We use const helpers to aid bindgen, to avoid conflicts when constants are +# recognized, block generation of the non-helper constants. +--blocklist-item ARCH_SLAB_MINALIGN +--blocklist-item ARCH_KMALLOC_MINALIGN +--blocklist-item VM_MERGEABLE +--blocklist-item VM_READ +--blocklist-item VM_WRITE +--blocklist-item VM_EXEC +--blocklist-item VM_SHARED +--blocklist-item VM_MAYREAD +--blocklist-item VM_MAYWRITE +--blocklist-item VM_MAYEXEC +--blocklist-item VM_MAYEXEC +--blocklist-item VM_PFNMAP +--blocklist-item VM_IO +--blocklist-item VM_DONTCOPY +--blocklist-item VM_DONTEXPAND +--blocklist-item VM_LOCKONFAULT +--blocklist-item VM_ACCOUNT +--blocklist-item VM_NORESERVE +--blocklist-item VM_HUGETLB +--blocklist-item VM_SYNC +--blocklist-item VM_ARCH_1 +--blocklist-item VM_WIPEONFORK +--blocklist-item VM_DONTDUMP +--blocklist-item VM_SOFTDIRTY +--blocklist-item VM_MIXEDMAP +--blocklist-item VM_HUGEPAGE +--blocklist-item VM_NOHUGEPAGE + +# Structs should implement `Zeroable` when all of their fields do. +--with-derive-custom-struct .*=MaybeZeroable +--with-derive-custom-union .*=MaybeZeroable -- cgit v1.3.1