Commit 4e376a28 authored by Petre Rodan's avatar Petre Rodan Committed by sanglipeng1
Browse files

tools: iio: replace seekdir() in iio_generic_buffer 

stable inclusion
from stable-v5.10.215
commit e0184c95aaf1ef4da92059099275ae4644a5d05b
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/IAJJ2D

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=e0184c95aaf1ef4da92059099275ae4644a5d05b

--------------------------------

[ Upstream commit 4e6500bfa053dc133021f9c144261b77b0ba7dc8 ]

Replace seekdir() with rewinddir() in order to fix a localized glibc bug.

One of the glibc patches that stable Gentoo is using causes an improper
directory stream positioning bug on 32bit arm. That in turn ends up as a
floating point exception in iio_generic_buffer.

The attached patch provides a fix by using an equivalent function which
should not cause trouble for other distros and is easier to reason about
in general as it obviously always goes back to to the start.

https://sourceware.org/bugzilla/show_bug.cgi?id=31212



Signed-off-by: default avatarPetre Rodan <petre.rodan@subdimension.ro>
Link: https://lore.kernel.org/r/20240108103224.3986-1-petre.rodan@subdimension.ro


Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
Signed-off-by: default avatarsanglipeng1 <sanglipeng1@jd.com>
parent b021184e

tools/iio/iio_utils.c

+1 −1
Original line number Diff line number Diff line
@@ -373,7 +373,7 @@ int build_channel_array(const char *device_dir, 
		goto error_close_dir;

	}



	seekdir(dp, 0);

	rewinddir(dp);

	while (ent = readdir(dp), ent) {

		if (strcmp(ent->d_name + strlen(ent->d_name) - strlen("_en"),

			   "_en") == 0) {