From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Kees Cook <keescook@chromium.org>,
Jan Harkes <jaharkes@cs.cmu.edu>,
coda@cs.cmu.edu, codalist@coda.cs.cmu.edu,
Sasha Levin <sashal@kernel.org>
Subject: [PATCH AUTOSEL 5.10 23/27] coda: Avoid partial allocation of sig_inputArgs
Date: Sun, 26 Feb 2023 09:50:10 -0500 [thread overview]
Message-ID: <20230226145014.828855-23-sashal@kernel.org> (raw)
In-Reply-To: <20230226145014.828855-1-sashal@kernel.org>
From: Kees Cook <keescook@chromium.org>
[ Upstream commit 48df133578c70185a95a49390d42df1996ddba2a ]
GCC does not like having a partially allocated object, since it cannot
reason about it for bounds checking when it is passed to other code.
Instead, fully allocate sig_inputArgs. (Alternatively, sig_inputArgs
should be defined as a struct coda_in_hdr, if it is actually not using
any other part of the union.) Seen under GCC 13:
../fs/coda/upcall.c: In function 'coda_upcall':
../fs/coda/upcall.c:801:22: warning: array subscript 'union inputArgs[0]' is partly outside array bounds of 'unsigned char[20]' [-Warray-bounds=]
801 | sig_inputArgs->ih.opcode = CODA_SIGNAL;
| ^~
Cc: Jan Harkes <jaharkes@cs.cmu.edu>
Cc: coda@cs.cmu.edu
Cc: codalist@coda.cs.cmu.edu
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20230127223921.never.882-kees@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
fs/coda/upcall.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/coda/upcall.c b/fs/coda/upcall.c
index eb3b1898da462..610484c90260b 100644
--- a/fs/coda/upcall.c
+++ b/fs/coda/upcall.c
@@ -790,7 +790,7 @@ static int coda_upcall(struct venus_comm *vcp,
sig_req = kmalloc(sizeof(struct upc_req), GFP_KERNEL);
if (!sig_req) goto exit;
- sig_inputArgs = kvzalloc(sizeof(struct coda_in_hdr), GFP_KERNEL);
+ sig_inputArgs = kvzalloc(sizeof(*sig_inputArgs), GFP_KERNEL);
if (!sig_inputArgs) {
kfree(sig_req);
goto exit;
--
2.39.0
next prev parent reply other threads:[~2023-02-26 15:31 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-26 14:49 [PATCH AUTOSEL 5.10 01/27] wifi: ath9k: Fix use-after-free in ath9k_hif_usb_disconnect() Sasha Levin
2023-02-26 14:49 ` [PATCH AUTOSEL 5.10 02/27] wifi: brcmfmac: Fix potential stack-out-of-bounds in brcmf_c_preinit_dcmds() Sasha Levin
2023-02-26 14:49 ` [PATCH AUTOSEL 5.10 03/27] rcu: Make RCU_LOCKDEP_WARN() avoid early lockdep checks Sasha Levin
2023-02-26 14:49 ` [PATCH AUTOSEL 5.10 04/27] rcu: Suppress smp_processor_id() complaint in synchronize_rcu_expedited_wait() Sasha Levin
2023-02-26 14:49 ` [PATCH AUTOSEL 5.10 05/27] rcu-tasks: Make rude RCU-Tasks work well with CPU hotplug Sasha Levin
2023-02-26 14:49 ` [PATCH AUTOSEL 5.10 06/27] wifi: ath11k: debugfs: fix to work with multiple PCI devices Sasha Levin
2023-02-26 14:49 ` [PATCH AUTOSEL 5.10 07/27] thermal: intel: Fix unsigned comparison with less than zero Sasha Levin
2023-02-26 14:49 ` [PATCH AUTOSEL 5.10 08/27] timers: Prevent union confusion from unexpected restart_syscall() Sasha Levin
2023-02-26 14:49 ` [PATCH AUTOSEL 5.10 09/27] x86/bugs: Reset speculation control settings on init Sasha Levin
2023-02-26 14:49 ` [PATCH AUTOSEL 5.10 10/27] wifi: brcmfmac: ensure CLM version is null-terminated to prevent stack-out-of-bounds Sasha Levin
2023-02-26 14:49 ` [PATCH AUTOSEL 5.10 11/27] wifi: mt7601u: fix an integer underflow Sasha Levin
2023-02-26 14:49 ` [PATCH AUTOSEL 5.10 12/27] inet: fix fast path in __inet_hash_connect() Sasha Levin
2023-02-26 14:50 ` [PATCH AUTOSEL 5.10 13/27] ice: add missing checks for PF vsi type Sasha Levin
2023-02-26 14:50 ` [PATCH AUTOSEL 5.10 14/27] ACPI: Don't build ACPICA with '-Os' Sasha Levin
2023-02-26 14:50 ` [PATCH AUTOSEL 5.10 15/27] clocksource: Suspend the watchdog temporarily when high read latency detected Sasha Levin
2023-02-26 14:50 ` [PATCH AUTOSEL 5.10 16/27] crypto: hisilicon: Wipe entire pool on error Sasha Levin
2023-02-26 14:50 ` [PATCH AUTOSEL 5.10 17/27] netpoll: Remove 4s sleep during carrier detection Sasha Levin
2023-02-26 14:50 ` [PATCH AUTOSEL 5.10 18/27] net: bcmgenet: Add a check for oversized packets Sasha Levin
2023-02-26 14:50 ` [PATCH AUTOSEL 5.10 19/27] m68k: Check syscall_trace_enter() return code Sasha Levin
2023-02-26 14:50 ` [PATCH AUTOSEL 5.10 20/27] wifi: mt76: dma: free rx_head in mt76_dma_rx_cleanup Sasha Levin
2023-02-26 14:50 ` [PATCH AUTOSEL 5.10 21/27] ACPI: video: Fix Lenovo Ideapad Z570 DMI match Sasha Levin
2023-02-26 14:50 ` [PATCH AUTOSEL 5.10 22/27] net/mlx5: fw_tracer: Fix debug print Sasha Levin
2023-02-26 14:50 ` Sasha Levin [this message]
2023-02-26 14:50 ` [PATCH AUTOSEL 5.10 24/27] uaccess: Add minimum bounds check on kernel buffer size Sasha Levin
2023-02-26 14:50 ` [PATCH AUTOSEL 5.10 25/27] PM: EM: fix memory leak with using debugfs_lookup() Sasha Levin
2023-02-26 14:50 ` [PATCH AUTOSEL 5.10 26/27] Bluetooth: btusb: Add VID:PID 13d3:3529 for Realtek RTL8821CE Sasha Levin
2023-02-26 14:50 ` [PATCH AUTOSEL 5.10 27/27] devlink: health: Fix nla_nest_end in error flow Sasha Levin
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