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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Wang Qing <wangqing@vivo.com>, Vineet Gupta <vgupta@synopsys.com>,
	Sasha Levin <sashal@kernel.org>,
	linux-snps-arc@lists.infradead.org
Subject: [PATCH AUTOSEL 4.19 05/28] arc: kernel: Return -EFAULT if copy_to_user() fails
Date: Mon, 12 Apr 2021 12:25:30 -0400	[thread overview]
Message-ID: <20210412162553.315227-5-sashal@kernel.org> (raw)
In-Reply-To: <20210412162553.315227-1-sashal@kernel.org>

From: Wang Qing <wangqing@vivo.com>

[ Upstream commit 46e152186cd89d940b26726fff11eb3f4935b45a ]

The copy_to_user() function returns the number of bytes remaining to be
copied, but we want to return -EFAULT if the copy doesn't complete.

Signed-off-by: Wang Qing <wangqing@vivo.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 arch/arc/kernel/signal.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arc/kernel/signal.c b/arch/arc/kernel/signal.c
index 48685445002e..da243420bcb5 100644
--- a/arch/arc/kernel/signal.c
+++ b/arch/arc/kernel/signal.c
@@ -99,7 +99,7 @@ stash_usr_regs(struct rt_sigframe __user *sf, struct pt_regs *regs,
 			     sizeof(sf->uc.uc_mcontext.regs.scratch));
 	err |= __copy_to_user(&sf->uc.uc_sigmask, set, sizeof(sigset_t));
 
-	return err;
+	return err ? -EFAULT : 0;
 }
 
 static int restore_usr_regs(struct pt_regs *regs, struct rt_sigframe __user *sf)
@@ -113,7 +113,7 @@ static int restore_usr_regs(struct pt_regs *regs, struct rt_sigframe __user *sf)
 				&(sf->uc.uc_mcontext.regs.scratch),
 				sizeof(sf->uc.uc_mcontext.regs.scratch));
 	if (err)
-		return err;
+		return -EFAULT;
 
 	set_current_blocked(&set);
 	regs->bta	= uregs.scratch.bta;
-- 
2.30.2


WARNING: multiple messages have this Message-ID (diff)
From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Wang Qing <wangqing@vivo.com>, Vineet Gupta <vgupta@synopsys.com>,
	Sasha Levin <sashal@kernel.org>,
	linux-snps-arc@lists.infradead.org
Subject: [PATCH AUTOSEL 4.19 05/28] arc: kernel: Return -EFAULT if copy_to_user() fails
Date: Mon, 12 Apr 2021 12:25:30 -0400	[thread overview]
Message-ID: <20210412162553.315227-5-sashal@kernel.org> (raw)
In-Reply-To: <20210412162553.315227-1-sashal@kernel.org>

From: Wang Qing <wangqing@vivo.com>

[ Upstream commit 46e152186cd89d940b26726fff11eb3f4935b45a ]

The copy_to_user() function returns the number of bytes remaining to be
copied, but we want to return -EFAULT if the copy doesn't complete.

Signed-off-by: Wang Qing <wangqing@vivo.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 arch/arc/kernel/signal.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arc/kernel/signal.c b/arch/arc/kernel/signal.c
index 48685445002e..da243420bcb5 100644
--- a/arch/arc/kernel/signal.c
+++ b/arch/arc/kernel/signal.c
@@ -99,7 +99,7 @@ stash_usr_regs(struct rt_sigframe __user *sf, struct pt_regs *regs,
 			     sizeof(sf->uc.uc_mcontext.regs.scratch));
 	err |= __copy_to_user(&sf->uc.uc_sigmask, set, sizeof(sigset_t));
 
-	return err;
+	return err ? -EFAULT : 0;
 }
 
 static int restore_usr_regs(struct pt_regs *regs, struct rt_sigframe __user *sf)
@@ -113,7 +113,7 @@ static int restore_usr_regs(struct pt_regs *regs, struct rt_sigframe __user *sf)
 				&(sf->uc.uc_mcontext.regs.scratch),
 				sizeof(sf->uc.uc_mcontext.regs.scratch));
 	if (err)
-		return err;
+		return -EFAULT;
 
 	set_current_blocked(&set);
 	regs->bta	= uregs.scratch.bta;
-- 
2.30.2


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  parent reply	other threads:[~2021-04-12 16:40 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-12 16:25 [PATCH AUTOSEL 4.19 01/28] net: ieee802154: nl-mac: fix check on panid Sasha Levin
2021-04-12 16:25 ` [PATCH AUTOSEL 4.19 02/28] ARM: dts: Drop duplicate sha2md5_fck to fix clk_disable race Sasha Levin
2021-04-12 16:25 ` [PATCH AUTOSEL 4.19 03/28] ARM: dts: Fix moving mmc devices with aliases for omap4 & 5 Sasha Levin
2021-04-12 16:25 ` [PATCH AUTOSEL 4.19 04/28] lockdep: Add a missing initialization hint to the "INFO: Trying to register non-static key" message Sasha Levin
2021-04-12 16:25 ` Sasha Levin [this message]
2021-04-12 16:25   ` [PATCH AUTOSEL 4.19 05/28] arc: kernel: Return -EFAULT if copy_to_user() fails Sasha Levin
2021-04-12 16:25 ` [PATCH AUTOSEL 4.19 06/28] neighbour: Disregard DEAD dst in neigh_update Sasha Levin
2021-04-12 16:25 ` [PATCH AUTOSEL 4.19 07/28] ARM: keystone: fix integer overflow warning Sasha Levin
2021-04-12 16:25   ` Sasha Levin
2021-04-12 16:25 ` [PATCH AUTOSEL 4.19 08/28] drivers: net: fix memory leak in atusb_probe Sasha Levin
2021-04-12 16:25 ` [PATCH AUTOSEL 4.19 09/28] drivers: net: fix memory leak in peak_usb_create_dev Sasha Levin
2021-04-12 16:25 ` [PATCH AUTOSEL 4.19 10/28] drm/msm: Fix a5xx/a6xx timestamps Sasha Levin
2021-04-12 16:25   ` Sasha Levin
2021-04-12 16:25 ` [PATCH AUTOSEL 4.19 11/28] ASoC: fsl_esai: Fix TDM slot setup for I2S mode Sasha Levin
2021-04-12 16:25   ` Sasha Levin
2021-04-12 16:25 ` [PATCH AUTOSEL 4.19 12/28] scsi: scsi_transport_srp: Don't block target in SRP_PORT_LOST state Sasha Levin
2021-04-12 16:25 ` [PATCH AUTOSEL 4.19 13/28] net: ieee802154: forbid monitor for set llsec params Sasha Levin
2021-04-12 16:25 ` [PATCH AUTOSEL 4.19 14/28] net: ieee802154: stop dump llsec keys for monitors Sasha Levin
2021-04-12 16:25 ` [PATCH AUTOSEL 4.19 15/28] net: ieee802154: stop dump llsec devs " Sasha Levin
2021-04-12 16:25 ` [PATCH AUTOSEL 4.19 16/28] net: ieee802154: forbid monitor for add llsec dev Sasha Levin
2021-04-12 16:25 ` [PATCH AUTOSEL 4.19 17/28] net: ieee802154: stop dump llsec devkeys for monitors Sasha Levin
2021-04-12 16:25 ` [PATCH AUTOSEL 4.19 18/28] net: ieee802154: forbid monitor for add llsec devkey Sasha Levin
2021-04-12 16:25 ` [PATCH AUTOSEL 4.19 19/28] net: ieee802154: stop dump llsec seclevels for monitors Sasha Levin
2021-04-12 16:25 ` [PATCH AUTOSEL 4.19 20/28] net: ieee802154: forbid monitor for add llsec seclevel Sasha Levin
2021-04-12 16:25 ` [PATCH AUTOSEL 4.19 21/28] net: ieee802154: forbid monitor for del " Sasha Levin
2021-04-12 16:25 ` [PATCH AUTOSEL 4.19 22/28] net: ieee802154: stop dump llsec params for monitors Sasha Levin
2021-04-12 16:25 ` [PATCH AUTOSEL 4.19 23/28] net: mac802154: Fix general protection fault Sasha Levin
2021-04-12 16:25 ` [PATCH AUTOSEL 4.19 24/28] pcnet32: Use pci_resource_len to validate PCI resource Sasha Levin
2021-04-12 16:25   ` Sasha Levin
2021-04-12 16:25 ` [PATCH AUTOSEL 4.19 25/28] net/rds: Avoid potential use after free in rds_send_remove_from_sock Sasha Levin
2021-04-12 16:25 ` [PATCH AUTOSEL 4.19 26/28] net: tipc: Fix spelling errors in net/tipc module Sasha Levin
2021-04-12 16:25 ` [PATCH AUTOSEL 4.19 27/28] mac80211: clear sta->fast_rx when STA removed from 4-addr VLAN Sasha Levin
2021-04-12 16:25 ` [PATCH AUTOSEL 4.19 28/28] cfg80211: remove WARN_ON() in cfg80211_sme_connect Sasha Levin

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