Joe Perches 5f42436428 sysfs: Add sysfs_emit and sysfs_emit_at to format sysfs output ... commit 2efc459d06 upstream. Output defects can exist in sysfs content using sprintf and snprintf. sprintf does not know the PAGE_SIZE maximum of the temporary buffer used for outputting sysfs content and it's possible to overrun the PAGE_SIZE buffer length. Add a generic sysfs_emit function that knows that the size of the temporary buffer and ensures that no overrun is done. Add a generic sysfs_emit_at function that can be used in multiple call situations that also ensures that no overrun is done. Validate the output buffer argument to be page aligned. Validate the offset len argument to be within the PAGE_SIZE buf. Signed-off-by: Joe Perches <joe@perches.com> Link: https://lore.kernel.org/r/884235202216d464d61ee975f7465332c86f76b2.1600285923.git.joe@perches.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2021-03-07 12:20:48 +01:00
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dir.c
file.c	sysfs: Add sysfs_emit and sysfs_emit_at to format sysfs output	2021-03-07 12:20:48 +01:00
group.c	sysfs: Add sysfs_update_groups function	2019-06-03 11:58:20 +02:00
Kconfig	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
Makefile	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
mount.c	no need to protect against put_user_ns(NULL)	2019-05-25 17:59:54 -04:00
symlink.c
sysfs.h