Sabyrzhan Tasbolatov 2a80c15812 net/qrtr: restrict user-controlled length in qrtr_tun_write_iter() ... 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>		2021-02-03 16:29:06 -08:00
..
Kconfig	treewide: replace '---help---' in Kconfig files with 'help'	2020-06-14 01:57:21 +09:00
Makefile	net: qrtr: Add MHI transport layer	2020-05-07 13:21:12 -07:00
mhi.c	net: qrtr: Unprepare MHI channels during remove	2020-11-20 11:55:17 +05:30
ns.c	net: qrtr: fix null-ptr-deref in qrtr_ns_remove	2021-01-05 16:50:09 -08:00
qrtr.c	net: qrtr: fix null-ptr-deref in qrtr_ns_remove	2021-01-05 16:50:09 -08:00
qrtr.h	net: qrtr: fix null-ptr-deref in qrtr_ns_remove	2021-01-05 16:50:09 -08:00
smd.c
tun.c	net/qrtr: restrict user-controlled length in qrtr_tun_write_iter()	2021-02-03 16:29:06 -08:00