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  1. 19 7月, 2017 9 次提交
  3. 18 7月, 2017 10 次提交
  5. 12 7月, 2017 4 次提交
    • I
      mlxsw: spectrum_switchdev: Check status of memory allocation · 6f497930
      由 Ido Schimmel 提交于 
      We can't rely on kzalloc() always succeeding, so check its return value.

Suppresses the following smatch error:

mlxsw_sp_switchdev_event() error: potential null dereference
'switchdev_work->fdb_info.addr'.  (kzalloc returns
 null)

Fixes: af061378 ("mlxsw: spectrum_switchdev: Add support for learning FDB through notification")
Signed-off-by: NIdo Schimmel <idosch@mellanox.com>
Signed-off-by: NJiri Pirko <jiri@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      6f497930
    • I
      mlxsw: spectrum_switchdev: Remove unused variable · a9265b80
      由 Ido Schimmel 提交于 
      Commit 10e23eb2 ("mlxsw: spectrum: Remove support for bypass bridge
port attributes/vlan set") removed statements that used 'bridge_vlan',
but didn't remove the variable itself resulting in the following warning
with W=1:

warning: variable ‘bridge_vlan’ set but not used
[-Wunused-but-set-variable]

Remove the variable and suppress the warning.

Fixes: 10e23eb2 ("mlxsw: spectrum: Remove support for bypass bridge port attributes/vlan set")
Signed-off-by: NIdo Schimmel <idosch@mellanox.com>
Signed-off-by: NJiri Pirko <jiri@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      a9265b80
    • I
      mlxsw: spectrum_router: Fix use-after-free in route replace · 7387dbbc
      由 Ido Schimmel 提交于 
      While working on IPv6 route replace I realized we can have a
use-after-free in IPv4 in case the replaced route is offloaded and the
only one using its FIB info.

The problem is that fib_table_insert() drops the reference on the FIB
info of the replaced routes which is eventually freed via call_rcu().
Since the driver doesn't hold a reference on this FIB info it can cause
a use-after-free when it tries to clear the RTNH_F_OFFLOAD flag stored
in fi->fib_flags.

After running the following commands in a loop for enough time with a
KASAN enabled kernel I finally got the below trace.

$ ip route add 192.168.50.0/24 via 192.168.200.1 dev enp3s0np3
$ ip route replace 192.168.50.0/24 dev enp3s0np5
$ ip route del 192.168.50.0/24 dev enp3s0np5

BUG: KASAN: use-after-free in mlxsw_sp_fib_entry_offload_unset+0xa7/0x120 [mlxsw_spectrum]
Read of size 4 at addr ffff8803717d9820 by task kworker/u4:2/55
[...]
? mlxsw_sp_fib_entry_offload_unset+0xa7/0x120 [mlxsw_spectrum]
? mlxsw_sp_fib_entry_offload_unset+0xa7/0x120 [mlxsw_spectrum]
? mlxsw_sp_router_neighs_update_work+0x1cd0/0x1ce0 [mlxsw_spectrum]
? mlxsw_sp_fib_entry_offload_unset+0xa7/0x120 [mlxsw_spectrum]
__asan_load4+0x61/0x80
mlxsw_sp_fib_entry_offload_unset+0xa7/0x120 [mlxsw_spectrum]
mlxsw_sp_fib_entry_offload_refresh+0xb6/0x370 [mlxsw_spectrum]
mlxsw_sp_router_fib_event_work+0xd1c/0x2780 [mlxsw_spectrum]
[...]
Freed by task 5131:
 save_stack_trace+0x16/0x20
 save_stack+0x46/0xd0
 kasan_slab_free+0x70/0xc0
 kfree+0x144/0x570
 free_fib_info_rcu+0x2e7/0x410
 rcu_process_callbacks+0x4f8/0xe30
 __do_softirq+0x1d3/0x9e2

Fix this by taking a reference on the FIB info when creating the nexthop
group it represents and drop it when the group is destroyed.

Fixes: 599cf8f9 ("mlxsw: spectrum_router: Add support for route replace")
Signed-off-by: NIdo Schimmel <idosch@mellanox.com>
Signed-off-by: NJiri Pirko <jiri@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      7387dbbc
    • I
      mlxsw: spectrum_router: Add missing rollback · a4e75b76
      由 Ido Schimmel 提交于 
      With this patch the error path of mlxsw_sp_nexthop_init() is symmetric
with mlxsw_sp_nexthop_fini(). Noticed during code review.

Fixes: a8c97014 ("mlxsw: spectrum_router: Refactor nexthop init routine")
Signed-off-by: NIdo Schimmel <idosch@mellanox.com>
Signed-off-by: NJiri Pirko <jiri@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      a4e75b76
  7. 30 6月, 2017 1 次提交
    • I
      mlxsw: spectrum_router: Fix NULL pointer dereference · 6b27c8ad
      由 Ido Schimmel 提交于 
      In case a VLAN device is enslaved to a bridge we shouldn't create a
router interface (RIF) for it when it's configured with an IP address.
This is already handled by the driver for other types of netdevs, such
as physical ports and LAG devices.

If this IP address is then removed and the interface is subsequently
unlinked from the bridge, a NULL pointer dereference can happen, as the
original 802.1d FID was replaced with an rFID which was then deleted.

To reproduce:
$ ip link set dev enp3s0np9 up
$ ip link add name enp3s0np9.111 link enp3s0np9 type vlan id 111
$ ip link set dev enp3s0np9.111 up
$ ip link add name br0 type bridge
$ ip link set dev br0 up
$ ip link set enp3s0np9.111 master br0
$ ip address add dev enp3s0np9.111 192.168.0.1/24
$ ip address del dev enp3s0np9.111 192.168.0.1/24
$ ip link set dev enp3s0np9.111 nomaster

Fixes: 99724c18 ("mlxsw: spectrum: Introduce support for router interfaces")
Signed-off-by: NIdo Schimmel <idosch@mellanox.com>
Reported-by: NPetr Machata <petrm@mellanox.com>
Tested-by: NPetr Machata <petrm@mellanox.com>
Reviewed-by: NPetr Machata <petrm@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      6b27c8ad
  9. 15 6月, 2017 2 次提交
  11. 09 6月, 2017 10 次提交
  13. 08 6月, 2017 1 次提交
  15. 07 6月, 2017 3 次提交