Sabyrzhan Tasbolatov b55528a18e net/qrtr: restrict user-controlled length in qrtr_tun_write_iter() ... commit 2a80c15812372e554474b1dba0b1d8e467af295d upstream. syzbot found WARNING in qrtr_tun_write_iter [1] when write_iter length exceeds KMALLOC_MAX_SIZE causing order >= MAX_ORDER condition. Additionally, there is no check for 0 length write. [1] WARNING: mm/page_alloc.c:5011 [..] Call Trace: alloc_pages_current+0x18c/0x2a0 mm/mempolicy.c:2267 alloc_pages include/linux/gfp.h:547 [inline] kmalloc_order+0x2e/0xb0 mm/slab_common.c:837 kmalloc_order_trace+0x14/0x120 mm/slab_common.c:853 kmalloc include/linux/slab.h:557 [inline] kzalloc include/linux/slab.h:682 [inline] qrtr_tun_write_iter+0x8a/0x180 net/qrtr/tun.c:83 call_write_iter include/linux/fs.h:1901 [inline] Reported-by: syzbot+c2a7e5c5211605a90865@syzkaller.appspotmail.com Signed-off-by: Sabyrzhan Tasbolatov <snovitoll@gmail.com> Link: https://lore.kernel.org/r/20210202092059.1361381-1-snovitoll@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2021-02-17 10:35:19 +01:00
..
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
qrtr.c	net: qrtr: check skb_put_padto() return value	2020-09-26 18:03:15 +02:00
qrtr.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
smd.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 284	2019-06-05 17:36:37 +02:00
tun.c	net/qrtr: restrict user-controlled length in qrtr_tun_write_iter()	2021-02-17 10:35:19 +01:00