diff options
| author | Oleg Nesterov <oleg@redhat.com> | 2013-07-09 03:00:51 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-07-09 21:33:25 +0400 |
| commit | 6af9df7f5ba35806a5919d3a36d95fd40e210b89 (patch) | |
| tree | cbcb2761b2579b984113f1e3950eab70bb6191be /arch/arm | |
| parent | 6961ed96f14463d7c6e38d8c2093f5d53bd70574 (diff) | |
| download | linux-6af9df7f5ba35806a5919d3a36d95fd40e210b89.tar.xz | |
ptrace/arm: revert "hw_breakpoints: Fix racy access to ptrace breakpoints"
This reverts commit bf0b8f4b55e5 ("hw_breakpoints: Fix racy access to
ptrace breakpoints").
The patch was fine but we can no longer race with SIGKILL after commit
9899d11f6544 ("ptrace: ensure arch_ptrace/ptrace_request can never race
with SIGKILL"), the __TASK_TRACED tracee can't be woken up and
->ptrace_bps[] can't go away.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jan Kratochvil <jan.kratochvil@redhat.com>
Cc: Michael Neuling <mikey@neuling.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Prasad <prasad@linux.vnet.ibm.com>
Cc: Russell King <linux@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/kernel/ptrace.c | 8 |
1 files changed, 0 insertions, 8 deletions
diff --git a/arch/arm/kernel/ptrace.c b/arch/arm/kernel/ptrace.c index 2bc1514d6dbe..0dd3b79b15c3 100644 --- a/arch/arm/kernel/ptrace.c +++ b/arch/arm/kernel/ptrace.c @@ -886,20 +886,12 @@ long arch_ptrace(struct task_struct *child, long request, #ifdef CONFIG_HAVE_HW_BREAKPOINT case PTRACE_GETHBPREGS: - if (ptrace_get_breakpoints(child) < 0) - return -ESRCH; - ret = ptrace_gethbpregs(child, addr, (unsigned long __user *)data); - ptrace_put_breakpoints(child); break; case PTRACE_SETHBPREGS: - if (ptrace_get_breakpoints(child) < 0) - return -ESRCH; - ret = ptrace_sethbpregs(child, addr, (unsigned long __user *)data); - ptrace_put_breakpoints(child); break; #endif |