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Biederman" , Adrian Reber , Thomas Gleixner , Jens Axboe , Alexei Starovoitov , "linux-fsdevel@vger.kernel.org" , "linux-kernel@vger.kernel.org" , linux-kselftest@vger.kernel.org, linux-mm@kvack.org, linux-security-module@vger.kernel.org, tiozhang , Luis Chamberlain , "Paulo Alcantara (SUSE)" , Sergey Senozhatsky , Frederic Weisbecker , YueHaibing , Paul Moore , Aleksa Sarai , Stefan Roesch , Chao Yu , xu xin , Jeff Layton , Jan Kara , David Hildenbrand , Dave Chinner , Shuah Khan , Elena Reshetova , David Windsor , Mateusz Guzik , Ard Biesheuvel , "Joel Fernandes (Google)" , "Matthew Wilcox (Oracle)" , Hans Liljestrand , Penglei Jiang , Lorenzo Stoakes , Adrian Ratiu , Ingo Molnar , "Peter Zijlstra (Intel)" , Cyrill Gorcunov , Eric Dumazet Subject: [RFC PATCH 0/3] mt-exec: fix deadlock with ptrace_attach() Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 X-Stat-Signature: o6o681t51jdio59tceqw9resznz6r338 X-Rspam-User: X-Rspamd-Queue-Id: 22F5D2000E X-Rspamd-Server: rspam01 X-HE-Tag: 1762708477-116740 X-HE-Meta: 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 xTs73SFS 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Not for inclusion yet. 2/2 is untested, incomplete, possibly buggy. But could you review at least the intent? Do you see any problem with this approach? This problem is very, very old. It seems that nobody can suggest a simple/clean fix... Oleg. --- fs/binfmt_elf.c | 4 +- fs/binfmt_elf_fdpic.c | 4 +- fs/binfmt_flat.c | 4 +- fs/exec.c | 142 +++++++++++++++++++++++------------------------- include/linux/binfmts.h | 2 +- kernel/exit.c | 9 +-- kernel/signal.c | 6 +- 7 files changed, 87 insertions(+), 84 deletions(-)