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From: Nicholas Miehlbradt <nicholas@linux.ibm.com>
To: glider@google.com, elver@google.com, dvyukov@google.com,
	akpm@linux-foundation.org, mpe@ellerman.id.au, npiggin@gmail.com,
	christophe.leroy@csgroup.eu
Cc: iii@linux.ibm.com, linux-kernel@vger.kernel.org,
	Nicholas Miehlbradt <nicholas@linux.ibm.com>,
	linux-mm@kvack.org, kasan-dev@googlegroups.com,
	linuxppc-dev@lists.ozlabs.org
Subject: [PATCH 02/13] hvc: Fix use of uninitialized array in udbg_hvc_putc
Date: Thu, 14 Dec 2023 05:55:28 +0000	[thread overview]
Message-ID: <20231214055539.9420-3-nicholas@linux.ibm.com> (raw)
In-Reply-To: <20231214055539.9420-1-nicholas@linux.ibm.com>

All elements of bounce_buffer are eventually read and passed to the
hypervisor so it should probably be fully initialized.

Signed-off-by: Nicholas Miehlbradt <nicholas@linux.ibm.com>
---
 drivers/tty/hvc/hvc_vio.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/tty/hvc/hvc_vio.c b/drivers/tty/hvc/hvc_vio.c
index 736b230f5ec0..1e88bfcdde20 100644
--- a/drivers/tty/hvc/hvc_vio.c
+++ b/drivers/tty/hvc/hvc_vio.c
@@ -227,7 +227,7 @@ static const struct hv_ops hvterm_hvsi_ops = {
 static void udbg_hvc_putc(char c)
 {
 	int count = -1;
-	unsigned char bounce_buffer[16];
+	unsigned char bounce_buffer[16] = { 0 };
 
 	if (!hvterm_privs[0])
 		return;
-- 
2.40.1


  parent reply	other threads:[~2023-12-14  5:59 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-12-14  5:55 [PATCH 00/13] kmsan: Enable on powerpc Nicholas Miehlbradt
2023-12-14  5:55 ` [PATCH 01/13] kmsan: Export kmsan_handle_dma Nicholas Miehlbradt
2024-02-19 19:37   ` Christophe Leroy
2023-12-14  5:55 ` Nicholas Miehlbradt [this message]
2023-12-14  8:36   ` [PATCH 02/13] hvc: Fix use of uninitialized array in udbg_hvc_putc Christophe Leroy
2023-12-21 12:09     ` Michael Ellerman
2023-12-14  5:55 ` [PATCH 03/13] powerpc: Disable KMSAN santitization for prom_init, vdso and purgatory Nicholas Miehlbradt
2023-12-14  5:55 ` [PATCH 04/13] powerpc: Disable CONFIG_DCACHE_WORD_ACCESS when KMSAN is enabled Nicholas Miehlbradt
2023-12-14  8:42   ` Christophe Leroy
2023-12-14  5:55 ` [PATCH 05/13] powerpc: Unpoison buffers populated by hcalls Nicholas Miehlbradt
2023-12-14  5:55 ` [PATCH 06/13] powerpc/pseries/nvram: Unpoison buffer populated by rtas_call Nicholas Miehlbradt
2023-12-14  5:55 ` [PATCH 07/13] powerpc/kprobes: Unpoison instruction in kprobe struct Nicholas Miehlbradt
2023-12-15  7:51   ` Naveen N Rao
2023-12-14  5:55 ` [PATCH 08/13] powerpc: Unpoison pt_regs Nicholas Miehlbradt
2023-12-14  5:55 ` [PATCH 09/13] powerpc: Disable KMSAN checks on functions which walk the stack Nicholas Miehlbradt
2023-12-14  9:00   ` Christophe Leroy
2024-01-10  4:16     ` Nicholas Miehlbradt
2023-12-15  9:02   ` Aneesh Kumar K.V
2023-12-14  5:55 ` [PATCH 10/13] powerpc: Define KMSAN metadata address ranges for vmalloc and ioremap Nicholas Miehlbradt
2023-12-14  9:17   ` Christophe Leroy
2024-01-10  3:54     ` Nicholas Miehlbradt
2023-12-15  9:27   ` Aneesh Kumar K.V
2023-12-14  5:55 ` [PATCH 11/13] powerpc: Implement architecture specific KMSAN interface Nicholas Miehlbradt
2023-12-14  9:20   ` Christophe Leroy
2023-12-14  5:55 ` [PATCH 12/13] powerpc/string: Add KMSAN support Nicholas Miehlbradt
2023-12-14  9:25   ` Christophe Leroy
2024-01-10  4:09     ` Nicholas Miehlbradt
2023-12-14  5:55 ` [PATCH 13/13] powerpc: Enable KMSAN on powerpc Nicholas Miehlbradt
2023-12-14  9:27   ` Christophe Leroy
2024-02-20  6:39 ` [PATCH 00/13] kmsan: Enable " Christophe Leroy

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