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Greg Kroah-Hartman e713f90b0d sysfs: clamp show() return value in sysfs_kf_read() ... [ Upstream commit 454257f6d1 ] sysfs_kf_seq_show() defends against buggy show() callbacks that return larger than PAGE_SIZE by clamping the value and printing a warning. sysfs_kf_read(), the prealloc variant, has no such defense. The only current in-tree user of __ATTR_PREALLOC is drivers/md/md.c, whose show() callbacks are well-behaved, so this is hardening against future drivers doing foolish things and out-of-tree code doing even more foolish things. Cc: NeilBrown <neil@brown.name> Cc: Tejun Heo <tj@kernel.org> Fixes: 2b75869bba ("sysfs/kernfs: allow attributes to request write buffer be pre-allocated.") Assisted-by: gregkh_clanker_t1000 Reviewed-by: Rafael J. Wysocki (Intel) <rafael@kernel.org> Reviewed-by: Danilo Krummrich <dakr@kernel.org> Link: https://patch.msgid.link/2026052000-drove-unicycle-d61b@gregkh Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		History 2026-07-24 15:51:29 +02:00
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dir.c	docs: filesystems: fix renamed references	2020-04-20 15:45:22 -06:00
file.c	sysfs: clamp show() return value in sysfs_kf_read()	2026-07-24 15:51:29 +02:00
group.c	sysfs: don't remove existing directory on update failure	2026-06-01 17:35:46 +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	docs: filesystems: fix renamed references	2020-04-20 15:45:22 -06:00
symlink.c	docs: filesystems: fix renamed references	2020-04-20 15:45:22 -06:00
sysfs.h	sysfs, kobject: allow creating kobject belonging to arbitrary users	2018-07-20 23:44:35 -07:00