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 4.4 03/23] arc: kernel: Return -EFAULT if copy_to_user() fails
Date: Mon, 12 Apr 2021 12:27:16 -0400 [thread overview]
Message-ID: <20210412162736.316026-3-sashal@kernel.org> (raw)
In-Reply-To: <20210412162736.316026-1-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 257b8699efde..639f39f39917 100644
--- a/arch/arc/kernel/signal.c
+++ b/arch/arc/kernel/signal.c
@@ -97,7 +97,7 @@ 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)
@@ -111,7 +111,7 @@ 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
next prev parent reply other threads:[~2021-04-12 16:48 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-12 16:27 [PATCH AUTOSEL 4.4 01/23] net: ieee802154: nl-mac: fix check on panid Sasha Levin
2021-04-12 16:27 ` [PATCH AUTOSEL 4.4 02/23] ARM: dts: Fix moving mmc devices with aliases for omap4 & 5 Sasha Levin
2021-04-12 16:27 ` Sasha Levin [this message]
2021-04-12 16:27 ` [PATCH AUTOSEL 4.4 04/23] neighbour: Disregard DEAD dst in neigh_update Sasha Levin
2021-04-12 16:27 ` [PATCH AUTOSEL 4.4 05/23] ARM: keystone: fix integer overflow warning Sasha Levin
2021-04-12 16:27 ` [PATCH AUTOSEL 4.4 06/23] drivers: net: fix memory leak in atusb_probe Sasha Levin
2021-04-12 16:27 ` [PATCH AUTOSEL 4.4 07/23] drivers: net: fix memory leak in peak_usb_create_dev Sasha Levin
2021-04-12 16:27 ` [PATCH AUTOSEL 4.4 08/23] ASoC: fsl_esai: Fix TDM slot setup for I2S mode Sasha Levin
2021-04-12 16:27 ` [PATCH AUTOSEL 4.4 09/23] net: ieee802154: forbid monitor for set llsec params Sasha Levin
2021-04-12 16:27 ` [PATCH AUTOSEL 4.4 10/23] net: ieee802154: stop dump llsec keys for monitors Sasha Levin
2021-04-12 16:27 ` [PATCH AUTOSEL 4.4 11/23] net: ieee802154: stop dump llsec devs " Sasha Levin
2021-04-12 16:27 ` [PATCH AUTOSEL 4.4 12/23] net: ieee802154: forbid monitor for add llsec dev Sasha Levin
2021-04-12 16:27 ` [PATCH AUTOSEL 4.4 13/23] net: ieee802154: stop dump llsec devkeys for monitors Sasha Levin
2021-04-12 16:27 ` [PATCH AUTOSEL 4.4 14/23] net: ieee802154: forbid monitor for add llsec devkey Sasha Levin
2021-04-12 16:27 ` [PATCH AUTOSEL 4.4 15/23] net: ieee802154: stop dump llsec seclevels for monitors Sasha Levin
2021-04-12 16:27 ` [PATCH AUTOSEL 4.4 16/23] net: ieee802154: forbid monitor for add llsec seclevel Sasha Levin
2021-04-12 16:27 ` [PATCH AUTOSEL 4.4 17/23] net: ieee802154: forbid monitor for del " Sasha Levin
2021-04-12 16:27 ` [PATCH AUTOSEL 4.4 18/23] net: ieee802154: stop dump llsec params for monitors Sasha Levin
2021-04-12 16:27 ` [PATCH AUTOSEL 4.4 19/23] net: mac802154: Fix general protection fault Sasha Levin
2021-04-12 16:27 ` [PATCH AUTOSEL 4.4 20/23] pcnet32: Use pci_resource_len to validate PCI resource Sasha Levin
2021-04-12 16:27 ` [PATCH AUTOSEL 4.4 21/23] net/rds: Avoid potential use after free in rds_send_remove_from_sock Sasha Levin
2021-04-12 16:27 ` [PATCH AUTOSEL 4.4 22/23] net: tipc: Fix spelling errors in net/tipc module Sasha Levin
2021-04-12 16:27 ` [PATCH AUTOSEL 4.4 23/23] cfg80211: remove WARN_ON() in cfg80211_sme_connect Sasha Levin
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