Haimin Zhang 1a34fb9e2b netdevsim: Zero-initialize memory for new map's value in function nsim_bpf_map_alloc ... [ Upstream commit 481221775d ] Zero-initialize memory for new map's value in function nsim_bpf_map_alloc since it may cause a potential kernel information leak issue, as follows: 1. nsim_bpf_map_alloc calls nsim_map_alloc_elem to allocate elements for a new map. 2. nsim_map_alloc_elem uses kmalloc to allocate map's value, but doesn't zero it. 3. A user application can use IOCTL BPF_MAP_LOOKUP_ELEM to get specific element's information in the map. 4. The kernel function map_lookup_elem will call bpf_map_copy_value to get the information allocated at step-2, then use copy_to_user to copy to the user buffer. This can only leak information for an array map. Fixes: 395cacb5f1 ("netdevsim: bpf: support fake map offload") Suggested-by: Jakub Kicinski <kuba@kernel.org> Acked-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Haimin Zhang <tcs.kernel@gmail.com> Link: https://lore.kernel.org/r/20211215111530.72103-1-tcs.kernel@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2021-12-22 09:30:55 +01:00
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bpf.c	netdevsim: Zero-initialize memory for new map's value in function nsim_bpf_map_alloc	2021-12-22 09:30:55 +01:00
bus.c
dev.c	netdevsim: dev: Initialize FIB module after debugfs	2021-04-07 15:00:07 +02:00
ethtool.c	netdevsim: fix duplicated debugfs directory	2020-09-26 14:19:08 -07:00
fib.c
health.c	netdevsim: set .owner to THIS_MODULE	2020-11-17 14:08:59 -08:00
ipsec.c	net: netdevsim: use xso.real_dev instead of xso.dev in callback functions of struct xfrmdev_ops	2021-07-25 14:36:19 +02:00
Makefile	netdevsim: add pause frame stats	2020-09-15 13:26:28 -07:00
netdev.c	netdevsim: init u64 stats for 32bit hardware	2021-03-17 17:06:15 +01:00
netdevsim.h	netdevsim: Add debugfs toggle to reject BPF programs in verifier	2020-12-09 16:27:42 +01:00
udp_tunnels.c	netdevsim: set .owner to THIS_MODULE	2020-11-17 14:08:59 -08:00