Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > linux.kernel > #1612860
| From | Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH 4.9 09/16] mips/ptrace: Preserve previous registers for short regset write |
| Date | 2017-03-30 12:20 +0200 |
| Message-ID | <tqFlo-4ME-9@gated-at.bofh.it> (permalink) |
| References | <tqFln-4ME-3@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
4.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: Dave Martin <Dave.Martin@arm.com>
commit d614fd58a2834cfe4efa472c33c8f3ce2338b09b upstream.
Ensure that if userspace supplies insufficient data to PTRACE_SETREGSET
to fill all the registers, the thread's old registers are preserved.
Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/mips/kernel/ptrace.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/arch/mips/kernel/ptrace.c
+++ b/arch/mips/kernel/ptrace.c
@@ -485,7 +485,8 @@ static int fpr_set(struct task_struct *t
&target->thread.fpu,
0, sizeof(elf_fpregset_t));
- for (i = 0; i < NUM_FPU_REGS; i++) {
+ BUILD_BUG_ON(sizeof(fpr_val) != sizeof(elf_fpreg_t));
+ for (i = 0; i < NUM_FPU_REGS && count >= sizeof(elf_fpreg_t); i++) {
err = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
&fpr_val, i * sizeof(elf_fpreg_t),
(i + 1) * sizeof(elf_fpreg_t));
Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
[PATCH 4.9 00/16] 4.9.20-stable review Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-30 12:20 +0200 [PATCH 4.9 09/16] mips/ptrace: Preserve previous registers for short regset write Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-30 12:20 +0200 [PATCH 4.9 11/16] metag/ptrace: Preserve previous registers for short regset write Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-30 12:20 +0200 [PATCH 4.9 13/16] metag/ptrace: Reject partial NT_METAG_RPIPE writes Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-30 12:20 +0200 [PATCH 4.9 14/16] fscrypt: remove broken support for detecting keyring key revocation Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-30 12:20 +0200 [PATCH 4.9 06/16] pinctrl: qcom: Dont clear status bit on irq_unmask Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-30 12:20 +0200 [PATCH 4.9 10/16] sparc/ptrace: Preserve previous registers for short regset write Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-30 12:20 +0200 [PATCH 4.9 07/16] c6x/ptrace: Remove useless PTRACE_SETREGSET implementation Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-30 12:20 +0200 [PATCH 4.9 01/16] xfrm: policy: init locks early Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-30 12:20 +0200 [PATCH 4.9 03/16] xfrm_user: validate XFRM_MSG_NEWAE incoming ESN size harder Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-30 12:20 +0200 [PATCH 4.9 08/16] h8300/ptrace: Fix incorrect register transfer count Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-30 12:20 +0200 [PATCH 4.9 12/16] metag/ptrace: Provide default TXSTATUS for short NT_PRSTATUS Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-30 12:20 +0200 [PATCH 4.9 04/16] KVM: x86: cleanup the page tracking SRCU instance Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-30 12:20 +0200 [PATCH 4.9 02/16] xfrm_user: validate XFRM_MSG_NEWAE XFRMA_REPLAY_ESN_VAL replay_window Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-30 12:30 +0200 [PATCH 4.9 05/16] virtio_balloon: init 1st buffer in stats vq Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-30 12:30 +0200 Re: [PATCH 4.9 00/16] 4.9.20-stable review Shuah Khan <shuahkh@osg.samsung.com> - 2017-03-30 21:00 +0200 Re: [PATCH 4.9 00/16] 4.9.20-stable review Guenter Roeck <linux@roeck-us.net> - 2017-03-31 05:50 +0200
csiph-web