From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C339E4A9D42; Tue, 15 Sep 2026 11:32:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789471967; cv=none; b=dP7yQEviVrVdTdousCrS89kiKkAN/Q2T3qE2T4fmwRRyS3LsAgUHNgGWVHqX/CTjmZM9SaNmQGI8KGtQLPs7QUTG/M+CebENWVf9T87l0NCEQOYG55/ZbQ3e2/YuU9QoNMXVpeXxmu/G+Rj0zGWUkIlhCp/U2Z14JoVwtRdtcAA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789471967; c=relaxed/simple; bh=O2Sy8b10JPTSM3T8FMxCg3yxJ2yYFrKaQgz1RZTqrDM=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=Hb1tRBfF1SDSOJ9RPs4d5KIVhV00IPdrzzuG4KqhB4tCpkMqVvTLe0yISZ+ZFLB0wDnFL7e1nv7gIaoMqMhj9Mj32a5fN8VORi04ugLqvINws0/ew/zLktuBNxAufeZPe/COMAwJyEtav0qrnwAI+oqehzDcE36wAHLh+KH/knU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=dCq0TREx; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="dCq0TREx" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 39A7F1F000FF; Tue, 15 Sep 2026 11:32:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789471965; bh=lhrRWmW1jhLpY0b4T+pXdyq2K6/6Lw3I7Dd8oxsFe60=; h=From:Date:Subject:References:In-Reply-To:To:Cc; b=dCq0TRExcU+BlQDM8hy6Cs9E6uwVSlfYujcFmaPmD6BlHGcwf1zlVdOj4iekia6nX al4ANJBJ1tX6VX0/MptbgzlPojdMZvifh4Xr1Iux25MunfDMJ0ZdADzgOLF+MDBHzN VJjSchXj7ycWNCGrw0+tgXtNpK5YAPLTUsheMDknEO+8eH1b0rnpbuY1zSztCCnVfA GRrWZUAcC9RH0jbS0xHcc8vRlak+IYa8EXS78G0mBcqGwylEICLDemOC/lzCP+aOI8 4k5cX3F/404vMcxuo7rNpXN7ULTgziEBKlCxV3cgzN4zcwdBCL7BCfVwLs7N1a0luj JpfRAWBOJ7VYQ== From: Christian Brauner Date: Tue, 15 Sep 2026 13:30:57 +0200 Subject: [PATCH RFC POC 11/50] MIPS: commit fds on syscall exit Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260915-work-fd-reserve-unify-folded-v1-11-4d5217d6b246@kernel.org> References: <20260915-work-fd-reserve-unify-folded-v1-0-4d5217d6b246@kernel.org> In-Reply-To: <20260915-work-fd-reserve-unify-folded-v1-0-4d5217d6b246@kernel.org> To: Linus Torvalds Cc: Alexander Viro , Jann Horn , Jan Kara , Ingo Molnar , Peter Zijlstra , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Oleg Nesterov , linux-alpha@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, linux-openrisc@vger.kernel.org, linux-parisc@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, Jens Axboe , io-uring@vger.kernel.org, netdev@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-gpio@vger.kernel.org, linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, bpf@vger.kernel.org, David Airlie , virtualization@lists.linux.dev, kvm@vger.kernel.org, kexec@lists.infradead.org, linux-hyperv@vger.kernel.org, "Christian Brauner (Amutable)" X-Mailer: b4 0.17-dev-db0b7 X-Developer-Signature: v=1; a=openpgp-sha256; l=2696; i=brauner@kernel.org; h=from:subject:message-id; bh=O2Sy8b10JPTSM3T8FMxCg3yxJ2yYFrKaQgz1RZTqrDM=; b=owGbwMvMwCU28Zj0gdSKO4sYT6slMWSt1KmVfhLzX2amjpDLni+t5iy5HyJ8fnfYuQs5t239d 4fnocLijlIWBjEuBlkxRRaHdpNwueU8FZuNMjVg5rAygQxh4OIUgImcVGP4H7v0ThyX7L2OzssZ Dg/usvC4O0iFJConhHNZcXS9mtKnwfBPb1pj+VPfVuVgW/nrzUqNt57OOi2ptdSndP/0CbwHHU/ xAgA= X-Developer-Key: i=brauner@kernel.org; a=openpgp; fpr=4880B8C9BD0E5106FC070F4F7B3C391EFEA93624 Add TIF_FD_SLOTS to the syscall exit work. The return path rereads the flags after the system call and calls syscall_trace_leave() for any of the exit work bits which commits the reservations before audit and the ptrace exit stop. Signed-off-by: Christian Brauner (Amutable) --- arch/mips/include/asm/thread_info.h | 5 ++++- arch/mips/kernel/ptrace.c | 4 ++++ 2 files changed, 8 insertions(+), 1 deletion(-) diff --git a/arch/mips/include/asm/thread_info.h b/arch/mips/include/asm/thread_info.h index 2707dad260dd..79c81696e9c1 100644 --- a/arch/mips/include/asm/thread_info.h +++ b/arch/mips/include/asm/thread_info.h @@ -114,6 +114,7 @@ register unsigned long current_stack_pointer __asm__("sp"); #define TIF_NOTIFY_RESUME 5 /* callback before returning to user */ #define TIF_UPROBE 6 /* breakpointed or singlestepping */ #define TIF_NOTIFY_SIGNAL 7 /* signal notifications exist */ +#define TIF_FD_SLOTS 8 /* syscall prepared descriptors */ #define TIF_RESTORE_SIGMASK 9 /* restore signal mask in do_signal() */ #define TIF_USEDFPU 16 /* FPU was used by this task this quantum (SMP) */ #define TIF_MEMDIE 18 /* is terminating due to OOM killer */ @@ -152,6 +153,7 @@ register unsigned long current_stack_pointer __asm__("sp"); #define _TIF_USEDMSA (1< #include #include +#include #include #include #include @@ -1364,6 +1365,9 @@ asmlinkage void syscall_trace_leave(struct pt_regs *regs) */ user_exit(); + if (test_thread_flag(TIF_FD_SLOTS)) + fd_slots_commit(regs); + audit_syscall_exit(regs); if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT))) -- 2.53.0