Oleg Nesterov 6d27a31ef1 uprobes: introduce the global struct vm_special_mapping xol_mapping ... Currently each xol_area has its own instance of vm_special_mapping, this is suboptimal and ugly. Kill xol_area->xol_mapping and add a single global instance of vm_special_mapping, the ->fault() method can use area->pages rather than xol_mapping->pages. As a side effect this fixes the problem introduced by the recent commit 223febc6e5 ("mm: add optional close() to struct vm_special_mapping"), if special_mapping_close() is called from the __mmput() paths, it will use vma->vm_private_data = &area->xol_mapping freed by uprobe_clear_state(). Link: https://lkml.kernel.org/r/20240911131407.GB3448@redhat.com Fixes: 223febc6e5 ("mm: add optional close() to struct vm_special_mapping") Signed-off-by: Oleg Nesterov <oleg@redhat.com> Reported-by: Sven Schnelle <svens@linux.ibm.com> Closes: https://lore.kernel.org/all/yt9dy149vprr.fsf@linux.ibm.com/ Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andrii Nakryiko <andrii@kernel.org> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Ian Rogers <irogers@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>		2024-09-17 01:07:01 -07:00
..
callchain.c	sysctl: treewide: constify the ctl_table argument of proc_handlers	2024-07-24 20:59:29 +02:00
core.c	perf/bpf: Don't call bpf_overflow_handler() for tracing events	2024-08-13 10:25:28 -07:00
hw_breakpoint_test.c	perf/hw_breakpoint: remove MODULE_LICENSE in non-modules	2023-04-13 13:13:52 -07:00
hw_breakpoint.c	perf/hw_breakpoint: Remove arch breakpoint hooks	2023-08-16 23:54:50 +10:00
internal.h	perf: Move swevent_htable::recursion into task_struct.	2024-07-09 13:26:36 +02:00
Makefile	perf/hw_breakpoint: Add KUnit test for constraints accounting	2022-08-30 10:56:20 +02:00
ring_buffer.c	perf: Make rb_alloc_aux() return an error immediately if nr_pages <= 0	2024-07-04 16:00:23 +02:00
uprobes.c	uprobes: introduce the global struct vm_special_mapping xol_mapping	2024-09-17 01:07:01 -07:00