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| author | Eric W. Biederman <ebiederm@xmission.com> | 2018-01-22 23:37:25 +0300 |
|---|---|---|
| committer | Eric W. Biederman <ebiederm@xmission.com> | 2018-01-23 04:07:11 +0300 |
| commit | f71dd7dc2dc989dc712b246a74d243e4b2c5f8a7 (patch) | |
| tree | c126cf571c0a25c540210fa7bfe8f03b19d0c2a4 /arch/xtensa | |
| parent | 47355040d2760566901057287b35d5f10e217e12 (diff) | |
| download | linux-f71dd7dc2dc989dc712b246a74d243e4b2c5f8a7.tar.xz | |
signal/ptrace: Add force_sig_ptrace_errno_trap and use it where needed
There are so many places that build struct siginfo by hand that at
least one of them is bound to get it wrong. A handful of cases in the
kernel arguably did just that when using the errno field of siginfo to
pass no errno values to userspace. The usage is limited to a single
si_code so at least does not mess up anything else.
Encapsulate this questionable pattern in a helper function so
that the userspace ABI is preserved.
Update all of the places that use this pattern to use the new helper
function.
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Diffstat (limited to 'arch/xtensa')
| -rw-r--r-- | arch/xtensa/kernel/ptrace.c | 8 |
1 files changed, 1 insertions, 7 deletions
diff --git a/arch/xtensa/kernel/ptrace.c b/arch/xtensa/kernel/ptrace.c index e2461968efb2..c0845cb1cbb9 100644 --- a/arch/xtensa/kernel/ptrace.c +++ b/arch/xtensa/kernel/ptrace.c @@ -278,7 +278,6 @@ static void ptrace_hbptriggered(struct perf_event *bp, struct pt_regs *regs) { int i; - siginfo_t info; struct arch_hw_breakpoint *bkpt = counter_arch_bp(bp); if (bp->attr.bp_type & HW_BREAKPOINT_X) { @@ -293,12 +292,7 @@ static void ptrace_hbptriggered(struct perf_event *bp, i = (i << 1) | 1; } - info.si_signo = SIGTRAP; - info.si_errno = i; - info.si_code = TRAP_HWBKPT; - info.si_addr = (void __user *)bkpt->address; - - force_sig_info(SIGTRAP, &info, current); + force_sig_ptrace_errno_trap(i, (void __user *)bkpt->address); } static struct perf_event *ptrace_hbp_create(struct task_struct *tsk, int type) |