diff --git a/include/linux/ptrace.h b/include/linux/ptrace.h index a89ff04bddd9fe214d183060fd2412da53e36959..addfbe7c180e0c5806adf375120e5919cfe35c4b 100644 --- a/include/linux/ptrace.h +++ b/include/linux/ptrace.h @@ -32,6 +32,8 @@ #define PT_TRACE_EXIT PT_EVENT_FLAG(PTRACE_EVENT_EXIT) #define PT_TRACE_SECCOMP PT_EVENT_FLAG(PTRACE_EVENT_SECCOMP) +#define PT_EXITKILL (PTRACE_O_EXITKILL << PT_OPT_FLAG_SHIFT) + /* single stepping state bits (used on ARM and PA-RISC) */ #define PT_SINGLESTEP_BIT 31 #define PT_SINGLESTEP (1<<PT_SINGLESTEP_BIT) diff --git a/include/uapi/linux/ptrace.h b/include/uapi/linux/ptrace.h index 1ef6c056a9e435640aa7c25ec4a72f2ed4af0c2e..022ab186a81252ceaad11708b69a8fcd964f19ed 100644 --- a/include/uapi/linux/ptrace.h +++ b/include/uapi/linux/ptrace.h @@ -73,7 +73,10 @@ #define PTRACE_O_TRACEEXIT (1 << PTRACE_EVENT_EXIT) #define PTRACE_O_TRACESECCOMP (1 << PTRACE_EVENT_SECCOMP) -#define PTRACE_O_MASK 0x000000ff +/* eventless options */ +#define PTRACE_O_EXITKILL (1 << 20) + +#define PTRACE_O_MASK (0x000000ff | PTRACE_O_EXITKILL) #include <asm/ptrace.h> diff --git a/kernel/ptrace.c b/kernel/ptrace.c index 1f5e55dda955544ca4a3f1f944e967f6b561bea2..ec8118ab2a47edaacda635a5eca0a104db3c09b3 100644 --- a/kernel/ptrace.c +++ b/kernel/ptrace.c @@ -457,6 +457,9 @@ void exit_ptrace(struct task_struct *tracer) return; list_for_each_entry_safe(p, n, &tracer->ptraced, ptrace_entry) { + if (unlikely(p->ptrace & PT_EXITKILL)) + send_sig_info(SIGKILL, SEND_SIG_FORCED, p); + if (__ptrace_detach(tracer, p)) list_add(&p->ptrace_entry, &ptrace_dead); }