0276af2176
ethtool_set_coalesce() now uses both the .get_coalesce() and
.set_coalesce() callbacks. But the check for their availability is
buggy, so changing the coalesce settings on a device where the driver
provides only _one_ of the callbacks results in a NULL pointer
dereference instead of an -EOPNOTSUPP.
Fix the condition so that the availability of both callbacks is
ensured. This also matches the netlink code.
Note that reproducing this requires some effort - it only affects the
legacy ioctl path, and needs a specific combination of driver options:
- have .get_coalesce() and .coalesce_supported but no
.set_coalesce(), or
- have .set_coalesce() but no .get_coalesce(). Here eg. ethtool doesn't
cause the crash as it first attempts to call ethtool_get_coalesce()
and bails out on error.
Fixes:
|
||
|---|---|---|
| .. | ||
| Makefile | ||
| bitset.c | ||
| bitset.h | ||
| cabletest.c | ||
| channels.c | ||
| coalesce.c | ||
| common.c | ||
| common.h | ||
| debug.c | ||
| eee.c | ||
| eeprom.c | ||
| features.c | ||
| fec.c | ||
| ioctl.c | ||
| linkinfo.c | ||
| linkmodes.c | ||
| linkstate.c | ||
| module.c | ||
| netlink.c | ||
| netlink.h | ||
| pause.c | ||
| phc_vclocks.c | ||
| privflags.c | ||
| rings.c | ||
| stats.c | ||
| strset.c | ||
| tsinfo.c | ||
| tunnels.c | ||
| wol.c | ||