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author | Vlad Buslov <vladbu@nvidia.com> | 2023-11-14 20:59:15 +0300 |
---|---|---|
committer | Paolo Abeni <pabeni@redhat.com> | 2023-11-16 12:52:59 +0300 |
commit | 7e1caeace0418381f36b3aa8403dfd82fc57fc53 (patch) | |
tree | d622b154536bda4d7c39fa95f699875140295e42 /drivers/scsi/megaraid | |
parent | 7cd5af0e937a197295f3aa3721031f0fbae49cff (diff) | |
download | linux-7e1caeace0418381f36b3aa8403dfd82fc57fc53.tar.xz |
macvlan: Don't propagate promisc change to lower dev in passthru
Macvlan device in passthru mode sets its lower device promiscuous mode
according to its MACVLAN_FLAG_NOPROMISC flag instead of synchronizing it to
its own promiscuity setting. However, macvlan_change_rx_flags() function
doesn't check the mode before propagating such changes to the lower device
which can cause net_device->promiscuity counter overflow as illustrated by
reproduction example [0] and resulting dmesg log [1]. Fix the issue by
first verifying the mode in macvlan_change_rx_flags() function before
propagating promiscuous mode change to the lower device.
[0]:
ip link add macvlan1 link enp8s0f0 type macvlan mode passthru
ip link set macvlan1 promisc on
ip l set dev macvlan1 up
ip link set macvlan1 promisc off
ip l set dev macvlan1 down
ip l set dev macvlan1 up
[1]:
[ 5156.281724] macvlan1: entered promiscuous mode
[ 5156.285467] mlx5_core 0000:08:00.0 enp8s0f0: entered promiscuous mode
[ 5156.287639] macvlan1: left promiscuous mode
[ 5156.288339] mlx5_core 0000:08:00.0 enp8s0f0: left promiscuous mode
[ 5156.290907] mlx5_core 0000:08:00.0 enp8s0f0: entered promiscuous mode
[ 5156.317197] mlx5_core 0000:08:00.0 enp8s0f0: promiscuity touches roof, set promiscuity failed. promiscuity feature of device might be broken.
Fixes: efdbd2b30caa ("macvlan: Propagate promiscuity setting to lower devices.")
Reviewed-by: Gal Pressman <gal@nvidia.com>
Signed-off-by: Vlad Buslov <vladbu@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Link: https://lore.kernel.org/r/20231114175915.1649154-1-vladbu@nvidia.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Diffstat (limited to 'drivers/scsi/megaraid')
0 files changed, 0 insertions, 0 deletions