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sfxge(4): check size of memory to read sensors data to

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Size of provided memory should be consistent with specified size.

Submitted by:   Martin Harvey <mharvey at solarflare.com>
Sponsored by:   Solarflare Communications, Inc.
MFC after:      1 week
Differential Revision:  https://reviews.freebsd.org/D18252
This commit is contained in:
Andrew Rybchenko 2018-11-30 07:04:13 +00:00
parent d515a203d8
commit 9d3487a623
1 changed files with 11 additions and 0 deletions
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11
sys/dev/sfxge/common/mcdi_mon.c
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@ -221,6 +221,12 @@ efx_mcdi_read_sensors(
uint8_t payload[MAX(MC_CMD_READ_SENSORS_EXT_IN_LEN,
MC_CMD_READ_SENSORS_EXT_OUT_LEN)];
uint32_t addr_lo, addr_hi;
efx_rc_t rc;
if (EFSYS_MEM_SIZE(esmp) < size) {
rc = EINVAL;
goto fail1;
}
req.emr_cmd = MC_CMD_READ_SENSORS;
req.emr_in_buf = payload;
@ -238,6 +244,11 @@ efx_mcdi_read_sensors(
efx_mcdi_execute(enp, &req);
return (req.emr_rc);
fail1:
EFSYS_PROBE1(fail1, efx_rc_t, rc);
return (rc);
}
static __checkReturn efx_rc_t