Haimin Zhang 27358aa81a 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 09:32:44 +01:00
..
Makefile	netdevsim: Add dummy psample implementation	2021-03-14 15:00:43 -07:00
bpf.c	netdevsim: Zero-initialize memory for new map's value in function nsim_bpf_map_alloc	2021-12-22 09:32:44 +01:00
bus.c	Driver core update for 5.15-rc1	2021-09-01 08:44:42 -07:00
dev.c	devlink: Set device as early as possible	2021-08-09 10:21:40 +01:00
ethtool.c	netdevsim: don't overwrite read only ethtool parms	2021-12-22 09:32:40 +01:00
fib.c	netdevsim: make array res_ids static const, makes object smaller	2021-08-02 09:12:24 -07:00
health.c	netdevsim: switch to memdup_user_nul()	2021-03-24 16:26:58 -07:00
ipsec.c	net: netdevsim: use xso.real_dev instead of xso.dev in callback functions of struct xfrmdev_ops	2021-07-06 10:36:59 -07:00
netdev.c	netdevsim: Add multi-queue support	2021-07-16 11:17:56 -07:00
netdevsim.h	netdevsim: Protect both reload_down and reload_up paths	2021-08-06 10:36:36 +01:00
psample.c	netdevsim: Only use sampling truncation length when valid	2021-04-22 13:23:56 -07:00
udp_tunnels.c	netdevsim: set .owner to THIS_MODULE	2020-11-17 14:08:59 -08:00