Unverified Commit f6023535 authored by Chang Yu's avatar Chang Yu Committed by Christian Brauner
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netfs: Fix a KMSAN uninit-value error in netfs_clear_buffer 



Use folioq_count instead of folioq_nr_slots to fix a KMSAN uninit-value
error in netfs_clear_buffer

Signed-off-by: default avatarChang Yu <marcus.yu.56@gmail.com>
Link: https://lore.kernel.org/r/ZvuXWC2bYpvQsWgS@gmail.com


Fixes: cd0277ed ("netfs: Use new folio_queue data type and iterator instead of xarray iter")
Acked-by: default avatarDavid Howells <dhowells@redhat.com>
Reported-by: default avatar <syzbot+921873345a95f4dae7e9@syzkaller.appspotmail.com>
Closes: https://syzkaller.appspot.com/bug?extid=921873345a95f4dae7e9


Signed-off-by: default avatarChristian Brauner <brauner@kernel.org>
parent 0d24852b

fs/netfs/misc.c

+1 −1
Original line number Diff line number Diff line
@@ -102,7 +102,7 @@ void netfs_clear_buffer(struct netfs_io_request *rreq) 


	while ((p = rreq->buffer)) {

		rreq->buffer = p->next;

		for (int slot = 0; slot < folioq_nr_slots(p); slot++) {

		for (int slot = 0; slot < folioq_count(p); slot++) {

			struct folio *folio = folioq_folio(p, slot);

			if (!folio)

				continue;