From owner-freebsd-bugs@freebsd.org Wed Mar 6 18:01:09 2019 Return-Path: Delivered-To: freebsd-bugs@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 382D81522016 for ; Wed, 6 Mar 2019 18:01:09 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mailman.ysv.freebsd.org (mailman.ysv.freebsd.org [IPv6:2001:1900:2254:206a::50:5]) by mx1.freebsd.org (Postfix) with ESMTP id AAF5196BF6 for ; Wed, 6 Mar 2019 18:01:08 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.ysv.freebsd.org (Postfix) id 646351522011; Wed, 6 Mar 2019 18:01:08 +0000 (UTC) Delivered-To: bugs@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 3DE1F152200F for ; Wed, 6 Mar 2019 18:01:08 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.ysv.freebsd.org (mxrelay.ysv.freebsd.org [IPv6:2001:1900:2254:206a::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.ysv.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id CA2EC96BF1 for ; Wed, 6 Mar 2019 18:01:07 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2001:1900:2254:206a::16:76]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.ysv.freebsd.org (Postfix) with ESMTPS id F15E7A0C3 for ; Wed, 6 Mar 2019 18:01:06 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id x26I16BK051846 for ; Wed, 6 Mar 2019 18:01:06 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id x26I16KV051842 for bugs@FreeBSD.org; Wed, 6 Mar 2019 18:01:06 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 236329] [FUSE] panic when opening a file with O_EXEC Date: Wed, 06 Mar 2019 18:01:06 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: CURRENT X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Many People X-Bugzilla-Who: asomers@FreeBSD.org X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: bugs@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform op_sys bug_status bug_severity priority component assigned_to reporter Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 06 Mar 2019 18:01:09 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D236329 Bug ID: 236329 Summary: [FUSE] panic when opening a file with O_EXEC Product: Base System Version: CURRENT Hardware: Any OS: Any Status: New Severity: Affects Many People Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: asomers@FreeBSD.org Simply opening a fuse-backed file with open(pathname, O_EXEC) is enough to trigger a panic. The bug is in fuse_filehandle_xlate_from_fflags, which assumes that at least one of FREAD or FWRITE will always be set. But that's not true when opening a file with O_EXEC. It seems surprising that nobody's run into this bug already. panic: FUSE: What kind of a flag is this (40000)? cpuid =3D 3 time =3D 1551894988 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe0030ca4= 510 vpanic() at vpanic+0x1b4/frame 0xfffffe0030ca4570 panic() at panic+0x43/frame 0xfffffe0030ca45d0 fuse_vnop_open() at fuse_vnop_open+0xdf/frame 0xfffffe0030ca4610 VOP_OPEN_APV() at VOP_OPEN_APV+0x60/frame 0xfffffe0030ca4630 vn_open_vnode() at vn_open_vnode+0x1b1/frame 0xfffffe0030ca46d0 vn_open_cred() at vn_open_cred+0x34c/frame 0xfffffe0030ca4820 kern_openat() at kern_openat+0x1fd/frame 0xfffffe0030ca4990 amd64_syscall() at amd64_syscall+0x276/frame 0xfffffe0030ca4ab0 fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe0030ca4ab0 --- syscall (499, FreeBSD ELF64, sys_openat), rip =3D 0x8005bc40a, rsp =3D 0x7fffffffe588, rbp =3D 0x7fffffffe600 --- --=20 You are receiving this mail because: You are the assignee for the bug.=