From: Al Viro <viro@zeniv.linux.org.uk> To: Aleksa Sarai <cyphar@cyphar.com> Cc: linux-ia64@vger.kernel.org, linux-sh@vger.kernel.org, Peter Zijlstra <peterz@infradead.org>, Rasmus Villemoes <linux@rasmusvillemoes.dk>, Alexei Starovoitov <ast@kernel.org>, linux-kernel@vger.kernel.org, David Howells <dhowells@redhat.com>, linux-kselftest@vger.kernel.org, sparclinux@vger.kernel.org, Christian Brauner <christian.brauner@ubuntu.com>, Shuah Khan <shuah@kernel.org>, linux-arch@vger.kernel.org, linux-s390@vger.kernel.org, Tycho Andersen <tycho@tycho.ws>, Aleksa Sarai <asarai@suse.de>, Jiri Olsa <jolsa@redhat.com>, Alexander Shishkin <alexander.shishkin@linux.intel.com>, Ingo Molnar <mingo@redhat.com>, linux-arm-kernel@lists.infradead.org, linux-mips@vger.kernel.org, linux-xtensa@linux-xtensa.org, Kees Cook <keescook@chromium.org>, Arnd Bergmann <arnd@arndb.de>, Jann Horn <jannh@google.com>, linuxppc-dev@lists.ozlabs.org, linux-m68k@lists.linux-m68k.org, Andy Lutomirski <luto@kernel.org>, Shuah Khan <skhan@linuxfoundation.org>, Namhyung Kim <namhyung@kernel.org>, David Drysdale <drysdale@google.com>, Christian Brauner <christian@brauner.io>, "J. Bruce Fields" <bfields@fieldses.org>, libc-alpha@sourceware.org, linux-parisc@vger.kernel.org, linux-api@vger.kernel.org, Chanho Min <chanho.min@lge.com>, Jeff Layton <jlayton@kernel.org>, Oleg Nesterov <oleg@redhat.com>, Eric Biederman <ebiederm@xmission.com>, linux-alpha@vger.kernel.org, linux-fsdevel@vger.kernel.org, Andrew Morton <akpm@linux-foundation.org>, Linus Torvalds <torvalds@linux-foundation.org>, containers@lists.linux-foundation.org Subject: Re: [PATCH v15 4/9] namei: LOOKUP_BENEATH: O_BENEATH-like scoped resolution Date: Wed, 13 Nov 2019 01:55:34 +0000 [thread overview] Message-ID: <20191113015534.GA26530@ZenIV.linux.org.uk> (raw) In-Reply-To: <20191105090553.6350-5-cyphar@cyphar.com> On Tue, Nov 05, 2019 at 08:05:48PM +1100, Aleksa Sarai wrote: Minor nit here - I'd split "move the conditional call of set_root() into nd_jump_root()" into a separate patch before that one. Makes for fewer distractions in this one. I'd probably fold "and be ready for errors other than -ECHILD" into the same preliminary patch. > + /* Not currently safe for scoped-lookups. */ > + if (unlikely(nd->flags & LOOKUP_IS_SCOPED)) > + return ERR_PTR(-EXDEV); Also a candidate for doing in nd_jump_link()... > @@ -1373,8 +1403,11 @@ static int follow_dotdot_rcu(struct nameidata *nd) > struct inode *inode = nd->inode; > > while (1) { > - if (path_equal(&nd->path, &nd->root)) > + if (path_equal(&nd->path, &nd->root)) { > + if (unlikely(nd->flags & LOOKUP_BENEATH)) > + return -EXDEV; Umm... Are you sure it's not -ECHILD?
WARNING: multiple messages have this Message-ID (diff)
From: Al Viro <viro@zeniv.linux.org.uk> To: Aleksa Sarai <cyphar@cyphar.com> Cc: Jeff Layton <jlayton@kernel.org>, "J. Bruce Fields" <bfields@fieldses.org>, Arnd Bergmann <arnd@arndb.de>, David Howells <dhowells@redhat.com>, Shuah Khan <shuah@kernel.org>, Shuah Khan <skhan@linuxfoundation.org>, Ingo Molnar <mingo@redhat.com>, Peter Zijlstra <peterz@infradead.org>, Christian Brauner <christian.brauner@ubuntu.com>, David Drysdale <drysdale@google.com>, Andy Lutomirski <luto@kernel.org>, Linus Torvalds <torvalds@linux-foundation.org>, Eric Biederman <ebiederm@xmission.com>, Andrew Morton <akpm@linux-foundation.org>, Alexei Starovoitov <ast@kernel.org>, Kees Cook <keescook@chromium.org>, Jann Horn <jannh@google.com>, Tycho Andersen <tycho@tycho.ws>, Chanho Min <chanho.min@lge.com>, Oleg Nesterov <oleg@redhat.com>, Rasmus Villemoes <linux@rasmusvillemoes.dk>, Alexander Shishkin <alexander.shishkin@linux.intel.com>, Jiri Olsa <jolsa@redhat.com>, Namhyung Kim <namhyung@kernel.org>, Christian Brauner <christian@brauner.io>, Aleksa Sarai <asarai@suse.de>, containers@lists.linux-foundation.org, linux-alpha@vger.kernel.org, linux-api@vger.kernel.org, libc-alpha@sourceware.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-fsdevel@vger.kernel.org, linux-ia64@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, linux-xtensa@linux-xtensa.org, sparclinux@vger.kernel.org Subject: Re: [PATCH v15 4/9] namei: LOOKUP_BENEATH: O_BENEATH-like scoped resolution Date: Wed, 13 Nov 2019 01:55:34 +0000 [thread overview] Message-ID: <20191113015534.GA26530@ZenIV.linux.org.uk> (raw) Message-ID: <20191113015534.N1Epg3RqYowSgws4j34e_nUbUaV_aqa3yyXMWktKBmI@z> (raw) In-Reply-To: <20191105090553.6350-5-cyphar@cyphar.com> On Tue, Nov 05, 2019 at 08:05:48PM +1100, Aleksa Sarai wrote: Minor nit here - I'd split "move the conditional call of set_root() into nd_jump_root()" into a separate patch before that one. Makes for fewer distractions in this one. I'd probably fold "and be ready for errors other than -ECHILD" into the same preliminary patch. > + /* Not currently safe for scoped-lookups. */ > + if (unlikely(nd->flags & LOOKUP_IS_SCOPED)) > + return ERR_PTR(-EXDEV); Also a candidate for doing in nd_jump_link()... > @@ -1373,8 +1403,11 @@ static int follow_dotdot_rcu(struct nameidata *nd) > struct inode *inode = nd->inode; > > while (1) { > - if (path_equal(&nd->path, &nd->root)) > + if (path_equal(&nd->path, &nd->root)) { > + if (unlikely(nd->flags & LOOKUP_BENEATH)) > + return -EXDEV; Umm... Are you sure it's not -ECHILD?
next prev parent reply other threads:[~2019-11-13 2:38 UTC|newest] Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-11-05 9:05 [PATCH v15 0/9] open: introduce openat2(2) syscall Aleksa Sarai 2019-11-05 9:05 ` [PATCH v15 1/9] namei: LOOKUP_NO_SYMLINKS: block symlink resolution Aleksa Sarai 2019-11-05 9:05 ` [PATCH v15 2/9] namei: LOOKUP_NO_MAGICLINKS: block magic-link resolution Aleksa Sarai 2019-11-13 1:24 ` Al Viro 2019-11-13 1:24 ` Al Viro 2019-11-05 9:05 ` [PATCH v15 3/9] namei: LOOKUP_NO_XDEV: block mountpoint crossing Aleksa Sarai 2019-11-13 1:36 ` Al Viro 2019-11-13 1:36 ` Al Viro 2019-11-14 4:49 ` Aleksa Sarai 2019-11-14 4:49 ` Aleksa Sarai 2019-11-14 5:43 ` Al Viro 2019-11-14 5:43 ` Al Viro 2019-11-14 13:33 ` Aleksa Sarai 2019-11-14 13:33 ` Aleksa Sarai 2019-11-05 9:05 ` [PATCH v15 4/9] namei: LOOKUP_BENEATH: O_BENEATH-like scoped resolution Aleksa Sarai 2019-11-13 1:55 ` Al Viro [this message] 2019-11-13 1:55 ` Al Viro 2019-11-13 7:47 ` Aleksa Sarai 2019-11-13 7:47 ` Aleksa Sarai 2019-11-14 4:57 ` Aleksa Sarai 2019-11-14 4:57 ` Aleksa Sarai 2019-11-05 9:05 ` [PATCH v15 5/9] namei: LOOKUP_IN_ROOT: chroot-like " Aleksa Sarai 2019-11-13 2:03 ` Al Viro 2019-11-13 2:03 ` Al Viro 2019-11-13 2:44 ` Aleksa Sarai 2019-11-13 2:44 ` Aleksa Sarai 2019-11-13 2:59 ` Al Viro 2019-11-13 2:59 ` Al Viro 2019-11-13 3:55 ` Aleksa Sarai 2019-11-13 3:55 ` Aleksa Sarai 2019-11-05 9:05 ` [PATCH v15 6/9] namei: LOOKUP_{IN_ROOT, BENEATH}: permit limited ".." resolution Aleksa Sarai 2019-11-13 2:09 ` [PATCH v15 6/9] namei: LOOKUP_{IN_ROOT,BENEATH}: " Al Viro 2019-11-13 2:09 ` Al Viro 2019-11-13 7:52 ` Aleksa Sarai 2019-11-13 7:52 ` Aleksa Sarai 2019-11-05 9:05 ` [PATCH v15 7/9] open: introduce openat2(2) syscall Aleksa Sarai 2019-11-13 2:29 ` Al Viro 2019-11-13 2:29 ` Al Viro 2019-11-13 2:35 ` Aleksa Sarai 2019-11-13 2:35 ` Aleksa Sarai 2019-11-05 9:05 ` [PATCH v15 8/9] selftests: add openat2(2) selftests Aleksa Sarai 2019-11-05 9:05 ` [PATCH v15 9/9] Documentation: path-lookup: mention LOOKUP_MAGICLINK_JUMPED Aleksa Sarai 2019-11-11 13:24 ` [PATCH v15 0/9] open: introduce openat2(2) syscall Aleksa Sarai 2019-11-12 23:01 ` Kees Cook 2019-11-12 23:01 ` Kees Cook 2019-11-12 23:06 ` Christian Brauner 2019-11-12 23:06 ` Christian Brauner 2019-11-13 0:46 ` Aleksa Sarai 2019-11-13 0:46 ` Aleksa Sarai
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