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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Pavel Begunkov <asml.silence@gmail.com>,
	Jens Axboe <axboe@kernel.dk>, Sasha Levin <sashal@kernel.org>,
	io-uring@vger.kernel.org, linux-fsdevel@vger.kernel.org
Subject: [PATCH AUTOSEL 5.10 32/51] io_uring: drop file refs after task cancel
Date: Tue, 12 Jan 2021 07:55:14 -0500	[thread overview]
Message-ID: <20210112125534.70280-32-sashal@kernel.org> (raw)
In-Reply-To: <20210112125534.70280-1-sashal@kernel.org>

From: Pavel Begunkov <asml.silence@gmail.com>

[ Upstream commit de7f1d9e99d8b99e4e494ad8fcd91f0c4c5c9357 ]

io_uring fds marked O_CLOEXEC and we explicitly cancel all requests
before going through exec, so we don't want to leave task's file
references to not our anymore io_uring instances.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 fs/io_uring.c | 25 ++++++++++++++++---------
 1 file changed, 16 insertions(+), 9 deletions(-)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 1f798c5c4213e..aebdbc842a637 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -8807,6 +8807,15 @@ static void io_uring_attempt_task_drop(struct file *file)
 		io_uring_del_task_file(file);
 }
 
+static void io_uring_remove_task_files(struct io_uring_task *tctx)
+{
+	struct file *file;
+	unsigned long index;
+
+	xa_for_each(&tctx->xa, index, file)
+		io_uring_del_task_file(file);
+}
+
 void __io_uring_files_cancel(struct files_struct *files)
 {
 	struct io_uring_task *tctx = current->io_uring;
@@ -8815,16 +8824,12 @@ void __io_uring_files_cancel(struct files_struct *files)
 
 	/* make sure overflow events are dropped */
 	atomic_inc(&tctx->in_idle);
-
-	xa_for_each(&tctx->xa, index, file) {
-		struct io_ring_ctx *ctx = file->private_data;
-
-		io_uring_cancel_task_requests(ctx, files);
-		if (files)
-			io_uring_del_task_file(file);
-	}
-
+	xa_for_each(&tctx->xa, index, file)
+		io_uring_cancel_task_requests(file->private_data, files);
 	atomic_dec(&tctx->in_idle);
+
+	if (files)
+		io_uring_remove_task_files(tctx);
 }
 
 static s64 tctx_inflight(struct io_uring_task *tctx)
@@ -8887,6 +8892,8 @@ void __io_uring_task_cancel(void)
 
 	finish_wait(&tctx->wait, &wait);
 	atomic_dec(&tctx->in_idle);
+
+	io_uring_remove_task_files(tctx);
 }
 
 static int io_uring_flush(struct file *file, void *data)
-- 
2.27.0


  parent reply	other threads:[~2021-01-12 12:57 UTC|newest]

Thread overview: 54+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-12 12:54 [PATCH AUTOSEL 5.10 01/51] ARC: build: remove non-existing bootpImage from KBUILD_IMAGE Sasha Levin
2021-01-12 12:54 ` [PATCH AUTOSEL 5.10 02/51] ARC: build: add uImage.lzma to the top-level target Sasha Levin
2021-01-12 12:54 ` [PATCH AUTOSEL 5.10 03/51] ARC: build: add boot_targets to PHONY Sasha Levin
2021-01-12 12:54 ` [PATCH AUTOSEL 5.10 04/51] ARC: build: move symlink creation to arch/arc/Makefile to avoid race Sasha Levin
2021-01-12 12:54 ` [PATCH AUTOSEL 5.10 05/51] ARM: omap2: pmic-cpcap: fix maximum voltage to be consistent with defaults on xt875 Sasha Levin
2021-01-12 12:54 ` [PATCH AUTOSEL 5.10 06/51] ath11k: fix crash caused by NULL rx_channel Sasha Levin
2021-01-12 12:54 ` [PATCH AUTOSEL 5.10 07/51] rtlwifi: rise completion at the last step of firmware callback Sasha Levin
2021-01-12 12:54 ` [PATCH AUTOSEL 5.10 08/51] netfilter: ipset: fixes possible oops in mtype_resize Sasha Levin
2021-01-12 12:54 ` [PATCH AUTOSEL 5.10 09/51] ath11k: qmi: try to allocate a big block of DMA memory first Sasha Levin
2021-01-12 12:54 ` [PATCH AUTOSEL 5.10 10/51] btrfs: fix async discard stall Sasha Levin
2021-01-12 12:54 ` [PATCH AUTOSEL 5.10 11/51] btrfs: merge critical sections of discard lock in workfn Sasha Levin
2021-01-12 12:54 ` [PATCH AUTOSEL 5.10 12/51] btrfs: fix transaction leak and crash after RO remount caused by qgroup rescan Sasha Levin
2021-01-12 12:54 ` [PATCH AUTOSEL 5.10 13/51] regulator: bd718x7: Add enable times Sasha Levin
2021-01-12 12:54 ` [PATCH AUTOSEL 5.10 14/51] ethernet: ucc_geth: fix definition and size of ucc_geth_tx_global_pram Sasha Levin
2021-01-12 12:54 ` [PATCH AUTOSEL 5.10 15/51] ARM: dts: ux500/golden: Set display max brightness Sasha Levin
2021-01-12 12:54 ` [PATCH AUTOSEL 5.10 16/51] qede: fix offload for IPIP tunnel packets Sasha Levin
2021-01-12 12:54 ` [PATCH AUTOSEL 5.10 17/51] stmmac: intel: Add PCI IDs for TGL-H platform Sasha Levin
2021-01-12 12:55 ` [PATCH AUTOSEL 5.10 18/51] e1000e: Only run S0ix flows if shutdown succeeded Sasha Levin
2021-01-12 12:55 ` [PATCH AUTOSEL 5.10 19/51] habanalabs: adjust pci controller init to new firmware Sasha Levin
2021-01-12 12:55 ` [PATCH AUTOSEL 5.10 20/51] habanalabs/gaudi: retry loading TPC f/w on -EINTR Sasha Levin
2021-01-12 12:55 ` [PATCH AUTOSEL 5.10 21/51] habanalabs: register to pci shutdown callback Sasha Levin
2021-01-12 12:55 ` [PATCH AUTOSEL 5.10 22/51] staging: spmi: hisi-spmi-controller: Fix some error handling paths Sasha Levin
2021-01-12 12:55 ` [PATCH AUTOSEL 5.10 23/51] CDC-NCM: remove "connected" log message Sasha Levin
2021-01-12 13:11   ` Greg Kroah-Hartman
2021-01-12 12:55 ` [PATCH AUTOSEL 5.10 24/51] spi: altera: fix return value for altera_spi_txrx() Sasha Levin
2021-01-12 12:55 ` [PATCH AUTOSEL 5.10 25/51] habanalabs: Fix memleak in hl_device_reset Sasha Levin
2021-01-12 12:55 ` [PATCH AUTOSEL 5.10 26/51] hwmon: (pwm-fan) Ensure that calculation doesn't discard big period values Sasha Levin
2021-01-12 12:55 ` [PATCH AUTOSEL 5.10 27/51] lib/raid6: Let $(UNROLL) rules work with macOS userland Sasha Levin
2021-01-12 12:55 ` [PATCH AUTOSEL 5.10 28/51] kconfig: remove 'kvmconfig' and 'xenconfig' shorthands Sasha Levin
2021-01-12 12:55 ` [PATCH AUTOSEL 5.10 29/51] spi: fix the divide by 0 error when calculating xfer waiting time Sasha Levin
2021-01-12 12:55 ` [PATCH AUTOSEL 5.10 30/51] dmaengine: stm32-mdma: fix STM32_MDMA_VERY_HIGH_PRIORITY value Sasha Levin
2021-01-12 12:55 ` [PATCH AUTOSEL 5.10 31/51] net: usb: qmi_wwan: add Quectel EM160R-GL Sasha Levin
2021-01-12 12:55 ` Sasha Levin [this message]
2021-01-12 12:55 ` [PATCH AUTOSEL 5.10 33/51] bfq: Fix computation of shallow depth Sasha Levin
2021-01-12 12:55 ` [PATCH AUTOSEL 5.10 34/51] arch/arc: add copy_user_page() to <asm/page.h> to fix build error on ARC Sasha Levin
2021-01-12 12:55 ` [PATCH AUTOSEL 5.10 35/51] misdn: dsp: select CONFIG_BITREVERSE Sasha Levin
2021-01-12 12:55 ` [PATCH AUTOSEL 5.10 36/51] net: ethernet: fs_enet: Add missing MODULE_LICENSE Sasha Levin
2021-01-12 12:55 ` [PATCH AUTOSEL 5.10 37/51] selftests: fix the return value for UDP GRO test Sasha Levin
2021-01-12 12:55 ` [PATCH AUTOSEL 5.10 38/51] nvme-pci: mark Samsung PM1725a as IGNORE_DEV_SUBNQN Sasha Levin
2021-01-12 12:55 ` [PATCH AUTOSEL 5.10 39/51] nvme: avoid possible double fetch in handling CQE Sasha Levin
2021-01-12 12:55 ` [PATCH AUTOSEL 5.10 40/51] nvmet-rdma: Fix list_del corruption on queue establishment failure Sasha Levin
2021-01-12 12:55 ` [PATCH AUTOSEL 5.10 41/51] drm/amd/display: fix sysfs amdgpu_current_backlight_pwm NULL pointer issue Sasha Levin
2021-01-12 12:55 ` [PATCH AUTOSEL 5.10 42/51] drm/amdgpu: fix a GPU hang issue when remove device Sasha Levin
2021-01-12 12:55 ` [PATCH AUTOSEL 5.10 43/51] drm/amd/pm: fix the failure when change power profile for renoir Sasha Levin
2021-01-12 12:55 ` [PATCH AUTOSEL 5.10 44/51] drm/amdgpu: fix potential memory leak during navi12 deinitialization Sasha Levin
2021-01-12 12:55 ` [PATCH AUTOSEL 5.10 45/51] gcc-plugins: fix gcc 11 indigestion with plugins Sasha Levin
2021-01-12 17:31   ` Kees Cook
2021-01-17 16:18     ` Sasha Levin
2021-01-12 12:55 ` [PATCH AUTOSEL 5.10 46/51] usb: typec: Fix copy paste error for NVIDIA alt-mode description Sasha Levin
2021-01-12 12:55 ` [PATCH AUTOSEL 5.10 47/51] iommu/vt-d: Fix lockdep splat in sva bind()/unbind() Sasha Levin
2021-01-12 12:55 ` [PATCH AUTOSEL 5.10 48/51] ACPI: scan: add stub acpi_create_platform_device() for !CONFIG_ACPI Sasha Levin
2021-01-12 12:55 ` [PATCH AUTOSEL 5.10 49/51] drm/msm: Call msm_init_vram before binding the gpu Sasha Levin
2021-01-12 12:55 ` [PATCH AUTOSEL 5.10 50/51] ARM: picoxcell: fix missing interrupt-parent properties Sasha Levin
2021-01-12 12:55 ` [PATCH AUTOSEL 5.10 51/51] poll: fix performance regression due to out-of-line __put_user() Sasha Levin

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