diff options
| author | Wei Fang <wei.fang@nxp.com> | 2026-05-20 14:44:15 +0800 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2026-05-21 08:48:59 -0700 |
| commit | 4a995d37b537f437daa01752d39cf44c6ba9ee2c (patch) | |
| tree | 9fbd57e8c9e11512cb2626ce150fd4895e6b455d /drivers/net | |
| parent | 5027266dea471e140f93dd534845c9c4f43219a3 (diff) | |
net: enetc: add ratelimiting to VF mailbox error messages
Sashiko reported that a buggy or malicious guest VM can flood the host
kernel log by repeatedly sending VF-to-PF messages at a high rate,
degrading host performance and hiding important system logs [1].
Fix by replacing dev_err()/dev_warn() with dev_err_ratelimited(),
limiting output to the default kernel ratelimit. This ensures errors are
still logged for debugging while preventing log flooding attacks.
Link: https://sashiko.dev/#/patchset/20260511080805.2052495-1-wei.fang%40nxp.com #1
Fixes: beb74ac878c8 ("enetc: Add vf to pf messaging support")
Signed-off-by: Wei Fang <wei.fang@nxp.com>
Reviewed-by: Harshitha Ramamurthy <hramamurthy@google.com>
Link: https://patch.msgid.link/20260520064421.91569-4-wei.fang@nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/ethernet/freescale/enetc/enetc_pf.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/net/ethernet/freescale/enetc/enetc_pf.c b/drivers/net/ethernet/freescale/enetc/enetc_pf.c index b743b6d33ccc..dea3a92c4722 100644 --- a/drivers/net/ethernet/freescale/enetc/enetc_pf.c +++ b/drivers/net/ethernet/freescale/enetc/enetc_pf.c @@ -494,8 +494,9 @@ static u16 enetc_msg_pf_set_vf_primary_mac_addr(struct enetc_pf *pf, addr = cmd->mac.sa_data; if (vf_state->flags & ENETC_VF_FLAG_PF_SET_MAC) { - dev_warn(dev, "Attempt to override PF set mac addr for VF%d\n", - vf_id); + dev_err_ratelimited(dev, + "VF%d attempted to override PF set MAC\n", + vf_id); return ENETC_MSG_CMD_STATUS_FAIL; } @@ -520,8 +521,9 @@ void enetc_msg_handle_rxmsg(struct enetc_pf *pf, int vf_id, u16 *status) break; default: *status = ENETC_MSG_CMD_STATUS_FAIL; - dev_err(dev, "command not supported (cmd_type: 0x%x)\n", - cmd_type); + dev_err_ratelimited(dev, + "command not supported (cmd_type: 0x%x)\n", + cmd_type); } } |