From: Catalin Marinas <catalin.marinas-5wv7dgnIgG8@public.gmane.org>
To: Andrey Konovalov <andreyknvl-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
Cc: Mark Rutland <mark.rutland-5wv7dgnIgG8@public.gmane.org>,
Kate Stewart
<kstewart-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org>,
kvm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Peter Zijlstra <peterz-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>,
Will Deacon <will.deacon-5wv7dgnIgG8@public.gmane.org>,
Alexei Starovoitov <ast-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org,
linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org,
Eric Dumazet <edumazet-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
linux-kselftest-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Chintan Pandya <cpandya-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>,
Vincenzo Frascino
<vincenzo.frascino-5wv7dgnIgG8@public.gmane.org>,
Shuah Khan <shuah-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Ingo Molnar <mingo-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
linux-arch-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
"David (ChunMing) Zhou"
<David1.Zhou-5C7GfCeVMHo@public.gmane.org>,
Jacob Bramley <Jacob.Bramley-5wv7dgnIgG8@public.gmane.org>,
Daniel Borkmann <daniel-FeC+5ew28dpmcu3hnIyYJQ@public.gmane.org>,
linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
amd-gfx-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org,
Szabolcs Nagy <Szabolcs.Nagy-5wv7dgnIgG8@public.gmane.org>,
Ingo Molnar <mingo-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
Dmitry Vyukov <dvyukov-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
Ramana Radhakrishnan
<Ramana.Radhakrishnan-5wv7dgnIgG8@public.gmane.org>,
Dave Martin <Dave.Ma>
Subject: Re: [PATCH v13 12/20] uprobes, arm64: untag user pointers in find_active_uprobe
Date: Fri, 22 Mar 2019 15:46:58 +0000 [thread overview]
Message-ID: <20190322154657.GR13384@arrakis.emea.arm.com> (raw)
In-Reply-To: <88d5255400fc6536d6a6895dd2a3aef0f0ecc899.1553093421.git.andreyknvl-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
On Wed, Mar 20, 2019 at 03:51:26PM +0100, Andrey Konovalov wrote:
> This patch is a part of a series that extends arm64 kernel ABI to allow to
> pass tagged user pointers (with the top byte set to something else other
> than 0x00) as syscall arguments.
>
> find_active_uprobe() uses user pointers (obtained via
> instruction_pointer(regs)) for vma lookups, which can only by done with
> untagged pointers.
>
> Untag user pointers in this function.
>
> Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
> ---
> kernel/events/uprobes.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c
> index c5cde87329c7..d3a2716a813a 100644
> --- a/kernel/events/uprobes.c
> +++ b/kernel/events/uprobes.c
> @@ -1992,6 +1992,8 @@ static struct uprobe *find_active_uprobe(unsigned long bp_vaddr, int *is_swbp)
> struct uprobe *uprobe = NULL;
> struct vm_area_struct *vma;
>
> + bp_vaddr = untagged_addr(bp_vaddr);
> +
> down_read(&mm->mmap_sem);
> vma = find_vma(mm, bp_vaddr);
> if (vma && vma->vm_start <= bp_vaddr) {
Similarly here, that's a breakpoint address, hence instruction pointer
(PC) which is untagged.
--
Catalin
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next prev parent reply other threads:[~2019-03-22 15:46 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <cover.1553093420.git.andreyknvl@google.com>
2019-03-20 14:51 ` [PATCH v13 01/20] uaccess: add untagged_addr definition for other arches Andrey Konovalov
2019-03-20 14:51 ` [PATCH v13 02/20] arm64: untag user pointers in access_ok and __uaccess_mask_ptr Andrey Konovalov
2019-03-20 14:51 ` [PATCH v13 03/20] lib, arm64: untag user pointers in strn*_user Andrey Konovalov
2019-03-20 14:51 ` [PATCH v13 04/20] mm, arm64: untag user pointers passed to memory syscalls Andrey Konovalov
2019-03-20 14:51 ` [PATCH v13 05/20] mm, arm64: untag user pointers in mm/gup.c Andrey Konovalov
2019-03-20 14:51 ` [PATCH v13 06/20] mm, arm64: untag user pointers in get_vaddr_frames Andrey Konovalov
2019-03-20 14:51 ` [PATCH v13 07/20] fs, arm64: untag user pointers in copy_mount_options Andrey Konovalov
2019-03-20 14:51 ` [PATCH v13 08/20] fs, arm64: untag user pointers in fs/userfaultfd.c Andrey Konovalov
2019-03-20 14:51 ` [PATCH v13 09/20] net, arm64: untag user pointers in tcp_zerocopy_receive Andrey Konovalov
2019-03-20 14:51 ` [PATCH v13 10/20] kernel, arm64: untag user pointers in prctl_set_mm* Andrey Konovalov
2019-03-20 14:51 ` [PATCH v13 11/20] tracing, arm64: untag user pointers in seq_print_user_ip Andrey Konovalov
2019-03-20 14:51 ` [PATCH v13 12/20] uprobes, arm64: untag user pointers in find_active_uprobe Andrey Konovalov
2019-03-20 14:51 ` [PATCH v13 13/20] bpf, arm64: untag user pointers in stack_map_get_build_id_offset Andrey Konovalov
2019-03-20 14:51 ` [PATCH v13 14/20] drm/amdgpu, arm64: untag user pointers in amdgpu_ttm_tt_get_user_pages Andrey Konovalov
2019-03-20 14:51 ` [PATCH v13 15/20] drm/radeon, arm64: untag user pointers in radeon_ttm_tt_pin_userptr Andrey Konovalov
2019-03-20 14:51 ` [PATCH v13 16/20] IB/mlx4, arm64: untag user pointers in mlx4_get_umem_mr Andrey Konovalov
2019-03-20 14:51 ` [PATCH v13 17/20] media/v4l2-core, arm64: untag user pointers in videobuf_dma_contig_user_get Andrey Konovalov
2019-03-20 14:51 ` [PATCH v13 18/20] tee/optee, arm64: untag user pointers in check_mem_type Andrey Konovalov
2019-03-20 14:51 ` [PATCH v13 19/20] vfio/type1, arm64: untag user pointers in vaddr_get_pfn Andrey Konovalov
2019-03-20 14:51 ` [PATCH v13 20/20] selftests, arm64: add a selftest for passing tagged pointers to kernel Andrey Konovalov
[not found] ` <76f96eb9162b3a7fa5949d71af38bf8fdf6924c4.1553093421.git.andreyknvl@google.com>
2019-03-21 17:52 ` [PATCH v13 10/20] kernel, arm64: untag user pointers in prctl_set_mm* Kevin Brodsky
[not found] ` <76f96eb9162b3a7fa5949d71af38bf8fdf6924c4.1553093421.git.andreyknvl-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
2019-03-22 15:41 ` Catalin Marinas
[not found] ` <20190322154136.GP13384-pQd4kjVL+RGcEQQL7YIRtlaTQe2KTcn/@public.gmane.org>
2019-04-01 16:44 ` Andrey Konovalov
[not found] ` <CAAeHK+yHp27eT+wTE3Uy4DkN8XN3ZjHATE+=HgjgRjrHjiXs3Q-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2019-04-11 16:40 ` Andrey Konovalov
2019-04-26 14:50 ` Catalin Marinas
[not found] ` <20190426145024.GC54863-pQd4kjVL+RGcEQQL7YIRtlaTQe2KTcn/@public.gmane.org>
2019-04-29 14:23 ` Andrey Konovalov
[not found] ` <CAAeHK+ww=6-fTnHN_33EEiKdMqXq5bNU4oW9oOMcfz1N_+Kisw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2019-05-01 14:43 ` Vincenzo Frascino
[not found] ` <44ad2d0c55dbad449edac23ae46d151a04102a1d.1553093421.git.andreyknvl@google.com>
[not found] ` <44ad2d0c55dbad449edac23ae46d151a04102a1d.1553093421.git.andreyknvl-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
2019-03-22 11:43 ` [PATCH v13 04/20] mm, arm64: untag user pointers passed to memory syscalls Catalin Marinas
[not found] ` <20190322114357.GC13384-pQd4kjVL+RGcEQQL7YIRtlaTQe2KTcn/@public.gmane.org>
2019-03-28 18:10 ` Andrey Konovalov
2019-03-28 18:19 ` Steven Rostedt
[not found] ` <2280b62096ce1fa5c9e9429d18f08f82f4be1b0b.1553093421.git.andreyknvl@google.com>
[not found] ` <2280b62096ce1fa5c9e9429d18f08f82f4be1b0b.1553093421.git.andreyknvl-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
2019-03-22 12:04 ` [PATCH v13 09/20] net, arm64: untag user pointers in tcp_zerocopy_receive Catalin Marinas
[not found] ` <20190322120434.GD13384-pQd4kjVL+RGcEQQL7YIRtlaTQe2KTcn/@public.gmane.org>
2019-03-25 13:54 ` Kevin Brodsky
[not found] ` <e5ed4fff-acf6-7b85-bf8f-df558a9cd33f-5wv7dgnIgG8@public.gmane.org>
2019-04-01 16:04 ` Andrey Konovalov
[not found] ` <c9553c3a4850d43c8af0c00e97850d70428b7de7.1553093421.git.andreyknvl@google.com>
[not found] ` <c9553c3a4850d43c8af0c00e97850d70428b7de7.1553093421.git.andreyknvl-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
2019-03-22 15:45 ` [PATCH v13 11/20] tracing, arm64: untag user pointers in seq_print_user_ip Catalin Marinas
[not found] ` <20190322154513.GQ13384-pQd4kjVL+RGcEQQL7YIRtlaTQe2KTcn/@public.gmane.org>
2019-04-01 15:38 ` Andrey Konovalov
[not found] ` <88d5255400fc6536d6a6895dd2a3aef0f0ecc899.1553093421.git.andreyknvl@google.com>
[not found] ` <88d5255400fc6536d6a6895dd2a3aef0f0ecc899.1553093421.git.andreyknvl-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
2019-03-22 15:46 ` Catalin Marinas [this message]
[not found] ` <09d6b8e5c8275de85c7aba716578fbcb3cbce924.1553093421.git.andreyknvl@google.com>
[not found] ` <09d6b8e5c8275de85c7aba716578fbcb3cbce924.1553093421.git.andreyknvl-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
2019-03-22 15:52 ` [PATCH v13 13/20] bpf, arm64: untag user pointers in stack_map_get_build_id_offset Catalin Marinas
[not found] ` <20190322155227.GS13384-pQd4kjVL+RGcEQQL7YIRtlaTQe2KTcn/@public.gmane.org>
2019-04-01 16:00 ` Andrey Konovalov
[not found] ` <038360a0a9dc0abaaaf3ad84a2d07fd544abce1a.1553093421.git.andreyknvl@google.com>
[not found] ` <038360a0a9dc0abaaaf3ad84a2d07fd544abce1a.1553093421.git.andreyknvl-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
2019-03-22 16:00 ` [PATCH v13 15/20] drm/radeon, arm64: untag user pointers in radeon_ttm_tt_pin_userptr Catalin Marinas
[not found] ` <20190322160057.GU13384-pQd4kjVL+RGcEQQL7YIRtlaTQe2KTcn/@public.gmane.org>
2019-04-02 14:17 ` Andrey Konovalov
[not found] ` <ae6961bcdd82e529c76d0747abd310546f81e58e.1553093421.git.andreyknvl@google.com>
[not found] ` <ae6961bcdd82e529c76d0747abd310546f81e58e.1553093421.git.andreyknvl-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
2019-03-22 16:07 ` [PATCH v13 17/20] media/v4l2-core, arm64: untag user pointers in videobuf_dma_contig_user_get Catalin Marinas
[not found] ` <20190322160726.GV13384-pQd4kjVL+RGcEQQL7YIRtlaTQe2KTcn/@public.gmane.org>
2019-03-25 14:08 ` Kevin Brodsky
[not found] ` <bfaae923-98aa-63e7-c50b-8649dc5fe2bb-5wv7dgnIgG8@public.gmane.org>
2019-04-01 16:13 ` Andrey Konovalov
[not found] ` <665632a911273ab537ded9acb78f4bafd91cbc19.1553093421.git.andreyknvl@google.com>
[not found] ` <665632a911273ab537ded9acb78f4bafd91cbc19.1553093421.git.andreyknvl-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
2019-03-22 16:22 ` [PATCH v13 18/20] tee/optee, arm64: untag user pointers in check_mem_type Catalin Marinas
[not found] ` <20190322162223.GW13384-pQd4kjVL+RGcEQQL7YIRtlaTQe2KTcn/@public.gmane.org>
2019-04-01 16:31 ` Andrey Konovalov
[not found] ` <017804b2198a906463d634f84777b6087c9b4a40.1553093421.git.andreyknvl@google.com>
[not found] ` <017804b2198a906463d634f84777b6087c9b4a40.1553093421.git.andreyknvl-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
2019-03-22 15:59 ` [PATCH v13 14/20] drm/amdgpu, arm64: untag user pointers in amdgpu_ttm_tt_get_user_pages Catalin Marinas
[not found] ` <20190322155955.GT13384-pQd4kjVL+RGcEQQL7YIRtlaTQe2KTcn/@public.gmane.org>
2019-03-25 14:02 ` Kevin Brodsky
2019-03-25 22:21 ` Kuehling, Felix
[not found] ` <574648a3-3a05-bea7-3f4e-7d71adedf1dc-5C7GfCeVMHo@public.gmane.org>
2019-04-02 14:37 ` Andrey Konovalov
2019-04-02 17:52 ` Kuehling, Felix
[not found] ` <1e2824fd77e8eeb351c6c6246f384d0d89fd2d58.1553093421.git.andreyknvl@google.com>
[not found] ` <1e2824fd77e8eeb351c6c6246f384d0d89fd2d58.1553093421.git.andreyknvl-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
2019-04-29 18:09 ` [PATCH v13 16/20] IB/mlx4, arm64: untag user pointers in mlx4_get_umem_mr Leon Romanovsky
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