Merge tag 'io_uring-7.3-20261002' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linuxgrafted

Pull io_uring fixes from Jens Axboe:

 - Fix a task_work add use-after-free with SQPOLL.

   The sqpoll thread could pop and complete the last request while
   io_req_normal_work_add() was still looking at them after the mpscq
   push.

   Use the same approach as DEFER_TASKRUN to protect from that, holding
   an RCU read lock across the add, and have exit wait for an RCU grace
   period for SQPOLL rings as well.

 - CQE32 ring fixes: correct the free entry check for 32b CQEs, zero the
   big_cqe for aux CQEs, and only post the dummy skip CQE on CQE_MIXED
   rings

 - Mark the source filter table as COW when cloning bpf filters, so
   registering another filter on the source doesn't modify the shared
   table in place

 - Initialize the task context before running the BPF loop

 - Requeue zcrx multishot receives stopped by a local resource

 - End a TX_TIMESTAMP multishot cmd when the CQ is full (lollipopkit)

* tag 'io_uring-7.3-20261002' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux:
  io_uring: fix task_work add use-after-free with SQPOLL
  io_uring/cmd_net: end TX_TIMESTAMP multishot when the CQ is full
  io_uring/zcrx: requeue multishot receives stopped by a local resource
  io_uring: initialize task context before running the BPF loop
  io_uring: zero big_cqe for aux CQEs on CQE32 rings
  io_uring: fix free entry check for 32b CQEs on CQE32 rings
  io_uring: only post the dummy skip CQE on CQE_MIXED rings
  io_uring/bpf_filter: mark source as COW when cloning filters

1 files changed, 192 insertions, 0 deletions

diff --git a/tools/perf/util/dwarf-aux.h b/tools/perf/util/dwarf-aux.h
new file mode 100644
index 000000000..161f0bf98
--- /dev/null
+++ b/tools/perf/util/dwarf-aux.h
@@ -0,0 +1,192 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+#ifndef _DWARF_AUX_H
+#define _DWARF_AUX_H
+/*
+ * dwarf-aux.h : libdw auxiliary interfaces
+ */
+
+#include <dwarf.h>
+#include <elfutils/libdw.h>
+#include <elfutils/libdwfl.h>
+#include <elfutils/version.h>
+
+static inline const char *die_name(Dwarf_Die *die)
+{
+	return dwarf_diename(die) ?: "<unknown>";
+}
+
+struct strbuf;
+
+/* Find the realpath of the target file */
+const char *cu_find_realpath(Dwarf_Die *cu_die, const char *fname);
+
+/* Get DW_AT_comp_dir (should be NULL with older gcc) */
+const char *cu_get_comp_dir(Dwarf_Die *cu_die);
+
+/* Get a line number and file name for given address */
+int cu_find_lineinfo(Dwarf_Die *cudie, Dwarf_Addr addr,
+		     const char **fname, int *lineno);
+
+/* Walk on functions at given address */
+int cu_walk_functions_at(Dwarf_Die *cu_die, Dwarf_Addr addr,
+			 int (*callback)(Dwarf_Die *, void *), void *data);
+
+/* Get DW_AT_linkage_name (should be NULL for C binary) */
+const char *die_get_linkage_name(Dwarf_Die *dw_die);
+
+/* Get the lowest PC in DIE (including range list) */
+int die_entrypc(Dwarf_Die *dw_die, Dwarf_Addr *addr);
+
+/* Ensure that this DIE is a subprogram and definition (not declaration) */
+bool die_is_func_def(Dwarf_Die *dw_die);
+
+/* Ensure that this DIE is an instance of a subprogram */
+bool die_is_func_instance(Dwarf_Die *dw_die);
+
+/* Compare diename and tname */
+bool die_compare_name(Dwarf_Die *dw_die, const char *tname);
+
+/* Matching diename with glob pattern */
+bool die_match_name(Dwarf_Die *dw_die, const char *glob);
+
+/* Get callsite line number of inline-function instance */
+int die_get_call_lineno(Dwarf_Die *in_die);
+
+/* Get callsite file name of inlined function instance */
+const char *die_get_call_file(Dwarf_Die *in_die);
+
+/* Get declared file name of a DIE */
+const char *die_get_decl_file(Dwarf_Die *dw_die);
+
+/* Get type die */
+Dwarf_Die *die_get_type(Dwarf_Die *vr_die, Dwarf_Die *die_mem);
+
+/* Get a type die, but skip qualifiers */
+Dwarf_Die *__die_get_real_type(Dwarf_Die *vr_die, Dwarf_Die *die_mem);
+/* Get a type die, but skip qualifiers and typedef */
+Dwarf_Die *die_get_real_type(Dwarf_Die *vr_die, Dwarf_Die *die_mem);
+/* Get a pointer/array type, following typedefs/qualifiers */
+Dwarf_Die *die_get_pointer_type(Dwarf_Die *type_die, Dwarf_Die *die_mem);
+
+/* Check whether the DIE is signed or not */
+bool die_is_signed_type(Dwarf_Die *tp_die);
+
+/* Get data_member_location offset */
+int die_get_data_member_location(Dwarf_Die *mb_die, Dwarf_Word *offs);
+
+/* Return values for die_find_child() callbacks */
+enum {
+	DIE_FIND_CB_END = 0,		/* End of Search */
+	DIE_FIND_CB_CHILD = 1,		/* Search only children */
+	DIE_FIND_CB_SIBLING = 2,	/* Search only siblings */
+	DIE_FIND_CB_CONTINUE = 3,	/* Search children and siblings */
+};
+
+/* Search child DIEs */
+Dwarf_Die *die_find_child(Dwarf_Die *rt_die,
+			 int (*callback)(Dwarf_Die *, void *),
+			 void *data, Dwarf_Die *die_mem);
+
+/* Search a non-inlined function including given address */
+Dwarf_Die *die_find_realfunc(Dwarf_Die *cu_die, Dwarf_Addr addr,
+			     Dwarf_Die *die_mem);
+
+/* Search a non-inlined function with tail call at given address */
+Dwarf_Die *die_find_tailfunc(Dwarf_Die *cu_die, Dwarf_Addr addr,
+				    Dwarf_Die *die_mem);
+
+/* Search the top inlined function including given address */
+Dwarf_Die *die_find_top_inlinefunc(Dwarf_Die *sp_die, Dwarf_Addr addr,
+				   Dwarf_Die *die_mem);
+
+/* Search the deepest inlined function including given address */
+Dwarf_Die *die_find_inlinefunc(Dwarf_Die *sp_die, Dwarf_Addr addr,
+			       Dwarf_Die *die_mem);
+
+/* Search a non-inlined function by name and returns its return type */
+Dwarf_Die *die_find_func_rettype(Dwarf_Die *sp_die, const char *name,
+				 Dwarf_Die *die_mem);
+
+/* Walk on the instances of given DIE */
+int die_walk_instances(Dwarf_Die *in_die,
+		       int (*callback)(Dwarf_Die *, void *), void *data);
+
+/* Walker on lines (Note: line number will not be sorted) */
+typedef int (* line_walk_callback_t) (const char *fname, int lineno,
+				      Dwarf_Addr addr, void *data);
+
+/*
+ * Walk on lines inside given DIE. If the DIE is a subprogram, walk only on
+ * the lines inside the subprogram, otherwise the DIE must be a CU DIE.
+ */
+int die_walk_lines(Dwarf_Die *rt_die, line_walk_callback_t callback, void *data);
+
+/* Find a variable called 'name' at given address */
+Dwarf_Die *die_find_variable_at(Dwarf_Die *sp_die, const char *name,
+				Dwarf_Addr addr, Dwarf_Die *die_mem);
+
+/* Find a member called 'name' */
+Dwarf_Die *die_find_member(Dwarf_Die *st_die, const char *name,
+			   Dwarf_Die *die_mem);
+
+/* Get the name of given type DIE */
+int die_get_typename_from_type(Dwarf_Die *type_die, struct strbuf *buf);
+
+/* Get the name of given variable DIE */
+int die_get_typename(Dwarf_Die *vr_die, struct strbuf *buf);
+
+/* Get the name and type of given variable DIE, stored as "type\tname" */
+int die_get_varname(Dwarf_Die *vr_die, struct strbuf *buf);
+
+/* Check if target program is compiled with optimization */
+bool die_is_optimized_target(Dwarf_Die *cu_die);
+
+/* Use next address after prologue as probe location */
+void die_skip_prologue(Dwarf_Die *sp_die, Dwarf_Die *cu_die,
+		       Dwarf_Addr *entrypc);
+
+/* Get the list of including scopes */
+int die_get_scopes(Dwarf_Die *cu_die, Dwarf_Addr pc, Dwarf_Die **scopes);
+
+/* Variable type information */
+struct die_var_type {
+	struct die_var_type *next;
+	u64 die_off;
+	u64 addr;
+	u64 end;        /* end address of location range */
+	int reg;
+	int offset;
+	/* Whether the register holds a address to the type */
+	bool is_reg_var_addr;
+	bool has_range; /* whether end is valid */
+};
+
+/* Return type info of a member at offset */
+Dwarf_Die *die_get_member_type(Dwarf_Die *type_die, int offset, Dwarf_Die *die_mem);
+
+/* Return type info where the pointer and offset point to */
+Dwarf_Die *die_deref_ptr_type(Dwarf_Die *ptr_die, int offset, Dwarf_Die *die_mem);
+
+/* Get byte offset range of given variable DIE */
+int die_get_var_range(Dwarf_Die *sp_die, Dwarf_Die *vr_die, struct strbuf *buf);
+
+/* Find a variable saved in the 'reg' at given address */
+Dwarf_Die *die_find_variable_by_reg(Dwarf_Die *sc_die, Dwarf_Addr pc, int reg,
+				    Dwarf_Die *type_die, int *poffset, bool is_fbreg,
+				    Dwarf_Die *die_mem);
+
+/* Find a (global) variable located in the 'addr' */
+Dwarf_Die *die_find_variable_by_addr(Dwarf_Die *sc_die, Dwarf_Addr addr,
+				     Dwarf_Die *die_mem, Dwarf_Die *type_die,
+				     int *offset);
+
+/* Save all variables and parameters in this scope */
+void die_collect_vars(Dwarf_Die *sc_die, struct die_var_type **var_types);
+
+/* Save all global variables in this CU */
+void die_collect_global_vars(Dwarf_Die *cu_die, struct die_var_type **var_types);
+
+/* Get the frame base information from CFA */
+int die_get_cfa(Dwarf *dwarf, u64 pc, int *preg, int *poffset);
+
+#endif /* _DWARF_AUX_H */