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From: Ahmad Fatoum <a.fatoum@pengutronix.de>
To: barebox@lists.infradead.org
Cc: Ahmad Fatoum <a.fatoum@pengutronix.de>
Subject: [PATCH 20/30] libfile: null-terminate read_file of wchar_t buffer
Date: Mon, 22 Nov 2021 09:47:22 +0100
Message-ID: <20211122084732.2597109-21-a.fatoum@pengutronix.de> (raw)
In-Reply-To: <20211122084732.2597109-1-a.fatoum@pengutronix.de>

read_file always nul-terminates the buffer, which is useful when
slurping ASCII text into a variable. This doesn't work as well for
UCS-2, because we need two aligned nuls there. Fix this.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
 lib/libfile.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/libfile.c b/lib/libfile.c
index 40b1d8bb2717..6b373f05ca72 100644
--- a/lib/libfile.c
+++ b/lib/libfile.c
@@ -213,7 +213,8 @@ again:
 		goto again;
 	}
 
-	buf = calloc(read_size + 1, 1);
+	/* ensure wchar_t nul termination */
+	buf = calloc(ALIGN(read_size, 2) + 2, 1);
 	if (!buf) {
 		ret = -ENOMEM;
 		errno = ENOMEM;
-- 
2.30.2


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  parent reply	other threads:[~2021-11-22  8:49 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-11-22  8:47 [PATCH 00/30] efi: refactor for upcoming loader support Ahmad Fatoum
2021-11-22  8:47 ` [PATCH 01/30] fs: remove useless AT_FDCWD references Ahmad Fatoum
2021-11-22  8:47 ` [PATCH 02/30] fs: remove unused struct node_d in struct dir Ahmad Fatoum
2021-11-22  8:47 ` [PATCH 03/30] block : efi: rename driver variable from efi_fs_driver to efi_bio_driver Ahmad Fatoum
2021-11-22  8:47 ` [PATCH 04/30] include: <linux/types.h>: wrap in #ifndef __ASSEMBLY__ Ahmad Fatoum
2021-11-22  8:47 ` [PATCH 05/30] hw_random: stm32: propagate error codes from rng read Ahmad Fatoum
2021-11-22  8:47 ` [PATCH 06/30] efi: align LOAD_FILE_PROTOCOL_GUID's name with other PROTOCOL_GUIDs Ahmad Fatoum
2021-11-22  8:47 ` [PATCH 07/30] asm-generic: move sync_caches_for_execution declaration to <asm/cache.h> Ahmad Fatoum
2021-11-22  8:47 ` [PATCH 08/30] common: move EFI code into new efi/ top level directory Ahmad Fatoum
2021-11-23  8:55   ` Jules Maselbas
2021-11-22  8:47 ` [PATCH 09/30] serial: efi-stdio: move efi-stdio.h header to central location Ahmad Fatoum
2021-11-22  8:47 ` [PATCH 10/30] efi: use SPDX-License-Identifier where appropriate Ahmad Fatoum
2021-11-23  8:52   ` Jules Maselbas
2021-11-22  8:47 ` [PATCH 11/30] drivers: efi: move Kconfig options to new menu Ahmad Fatoum
2021-11-22  8:47 ` [PATCH 12/30] efi: factor out errno translation Ahmad Fatoum
2021-11-22  8:47 ` [PATCH 13/30] efi: rename <efi/efi.h> to <efi/efi-payload.h> Ahmad Fatoum
2021-11-22  8:47 ` [PATCH 14/30] efi: centralize efivarfs_parse_filename Ahmad Fatoum
2021-11-22  8:47 ` [PATCH 15/30] kbuild: force 16-bit wchar_t treewide Ahmad Fatoum
2021-11-22  8:47 ` [PATCH 16/30] include: <linux/nls.h>: remove duplicate wchar_t typedef Ahmad Fatoum
2021-11-22  8:47 ` [PATCH 17/30] lib: wchar: add wctomb and mbtowc Ahmad Fatoum
2021-11-22  8:47 ` [PATCH 18/30] lib: implement wcsnlen Ahmad Fatoum
2021-11-22  8:47 ` [PATCH 19/30] vsprintf: add optional support for %ls format modifier Ahmad Fatoum
2021-11-22  8:47 ` Ahmad Fatoum [this message]
2021-11-22  8:47 ` [PATCH 21/30] commands: echo: add wide file output via wecho alias Ahmad Fatoum
2021-11-22  8:47 ` [PATCH 22/30] efi: make efi_main __noreturn Ahmad Fatoum
2021-11-22  8:47 ` [PATCH 23/30] efi: define and use new EFI_ERROR_MASK macro Ahmad Fatoum
2021-11-22  8:47 ` [PATCH 24/30] common: move CONFIG_ELF into General Settings Ahmad Fatoum
2021-11-22  8:47 ` [PATCH 25/30] efi: don't zero executable buffer before freeing Ahmad Fatoum
2021-11-22  8:47 ` [PATCH 26/30] partitions: efi: move header to central location Ahmad Fatoum
2021-11-22  8:47 ` [PATCH 27/30] efi: print early efi_main string on CONFIG_DEBUG_LL=y Ahmad Fatoum
2021-11-22  8:47 ` [PATCH 28/30] ARM64: board-dt-2nd: remove no longer needed noinline function split Ahmad Fatoum
2021-11-22  8:47 ` [PATCH 29/30] bus: acpi: register bus even if without ACPI EFI table Ahmad Fatoum
2021-11-22  8:47 ` [PATCH 30/30] efi: guid: fix typos Ahmad Fatoum
2021-11-25  7:44 ` [PATCH 00/30] efi: refactor for upcoming loader support Sascha Hauer

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