From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id A5A313857C50; Mon, 31 Aug 2020 07:54:19 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org A5A313857C50 From: "ianchi at andestech dot com" To: gdb-prs@sourceware.org Subject: [Bug threads/26286] FAIL: gdb.threads/attach-many-short-lived-threads.exp: iter 1: break at break_fn: 1 (SIGTRAP) Date: Mon, 31 Aug 2020 07:54:19 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gdb X-Bugzilla-Component: threads X-Bugzilla-Version: HEAD X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: ianchi at andestech dot com X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P2 X-Bugzilla-Assigned-To: unassigned at sourceware dot org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: cc Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://sourceware.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: gdb-prs@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gdb-prs mailing list List-Unsubscribe: , List-Archive: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 31 Aug 2020 07:54:19 -0000 https://sourceware.org/bugzilla/show_bug.cgi?id=3D26286 Chungyi Chi changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |ianchi at andestech dot com --- Comment #3 from Chungyi Chi --- It is not a bug but security issue. Due to ptrace protection, if you wanna attach another process without "parent-child relationship", it is illegal behavior. There are two different way to solve this issue. 1. Execute under root level 2. Set "/proc/sys/kernel/yama/ptrace_scope" into 0. --=20 You are receiving this mail because: You are on the CC list for the bug.=