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linux/net/ethtool
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Hangbin Liu b2fb1a3363 ethtool: strset: check nla_len overflow 
The netlink attribute length field nla_len is a __u16, which can only
represent values up to 65535 bytes. NICs with a large number of
statistics strings (e.g. mlx5_core with thousands of ETH_SS_STATS
entries) can produce a ETHTOOL_A_STRINGSET_STRINGS nest that exceeds
this limit.

When nla_nest_end() writes the actual nest size back to nla_len, the
value is silently truncated. This results in a corrupted netlink message
being sent to userspace: the parser reads a wrong (truncated) attribute
length and misaligns all subsequent attribute boundaries, causing decode
errors.

Fix this by using the new helper nla_nest_end_safe and error out if
the size exceeds U16_MAX.

Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Link: https://patch.msgid.link/20260408-b4-ynl_ethtool-v2-5-7623a5e8f70b@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-04-12 11:23:50 -07:00
..
bitset.c net: ethtool: re-order local includes 2026-03-20 19:10:18 -07:00
bitset.h net: ethtool: re-order local includes 2026-03-20 19:10:18 -07:00
cabletest.c net: ethtool: re-order local includes 2026-03-20 19:10:18 -07:00
channels.c net, ethtool: Disallow leased real rxqs to be resized 2026-04-09 18:21:46 -07:00
cmis_cdb.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
cmis_fw_update.c net: move misc netdev_lock flavors to a separate header 2025-03-08 09:06:50 -08:00
cmis.h ethtool: cmis_cdb: Fix incorrect read / write length extension 2025-04-10 14:32:43 +02:00
coalesce.c net: ethtool: re-order local includes 2026-03-20 19:10:18 -07:00
common.c ethtool: Add RSS indirection table resize helpers 2026-03-23 17:59:54 -07:00
common.h net: ethtool: add get_rx_ring_count callback to optimize RX ring queries 2025-09-18 07:07:37 -07:00
debug.c net: ethtool: re-order local includes 2026-03-20 19:10:18 -07:00
eee.c net: ethtool: re-order local includes 2026-03-20 19:10:18 -07:00
eeprom.c net: ethtool: pass genl_info to the ethnl parse_request operation 2026-03-24 20:14:29 -07:00
features.c net: ethtool: re-order local includes 2026-03-20 19:10:18 -07:00
fec.c net: ethtool: re-order local includes 2026-03-20 19:10:18 -07:00
ioctl.c net, ethtool: Disallow leased real rxqs to be resized 2026-04-09 18:21:46 -07:00
linkinfo.c net: ethtool: re-order local includes 2026-03-20 19:10:18 -07:00
linkmodes.c net: ethtool: re-order local includes 2026-03-20 19:10:18 -07:00
linkstate.c net: ethtool: re-order local includes 2026-03-20 19:10:18 -07:00
Makefile ethtool: netlink: add ETHTOOL_MSG_MSE_GET and wire up PHY MSE access 2025-11-03 18:32:27 -08:00
mm.c treewide, timers: Rename from_timer() to timer_container_of() 2025-06-08 09:07:37 +02:00
module_fw.h ethtool: Add ability to flash transceiver modules' firmware 2024-06-28 10:48:23 +01:00
module.c net: ethtool: re-order local includes 2026-03-20 19:10:18 -07:00
mse.c net: ethtool: re-order local includes 2026-03-20 19:10:18 -07:00
netlink.c net: ethtool: pass genl_info to the ethnl parse_request operation 2026-03-24 20:14:29 -07:00
netlink.h net: ethtool: pass genl_info to the ethnl parse_request operation 2026-03-24 20:14:29 -07:00
pause.c net: ethtool: pass genl_info to the ethnl parse_request operation 2026-03-24 20:14:29 -07:00
phc_vclocks.c net: ethtool: re-order local includes 2026-03-20 19:10:18 -07:00
phy.c net: ethtool: re-order local includes 2026-03-20 19:10:18 -07:00
plca.c net: ethtool: re-order local includes 2026-03-20 19:10:18 -07:00
privflags.c net: ethtool: re-order local includes 2026-03-20 19:10:18 -07:00
pse-pd.c net: ethtool: re-order local includes 2026-03-20 19:10:18 -07:00
rings.c net: ethtool: re-order local includes 2026-03-20 19:10:18 -07:00
rss.c net: ethtool: pass genl_info to the ethnl parse_request operation 2026-03-24 20:14:29 -07:00
stats.c net: ethtool: pass genl_info to the ethnl parse_request operation 2026-03-24 20:14:29 -07:00
strset.c ethtool: strset: check nla_len overflow 2026-04-12 11:23:50 -07:00
ts.h net: ethtool: tsinfo: Enhance tsinfo to support several hwtstamp by net topology 2024-12-16 12:51:41 +00:00
tsconfig.c net: ethtool: re-order local includes 2026-03-20 19:10:18 -07:00
tsinfo.c net: ethtool: pass genl_info to the ethnl parse_request operation 2026-03-24 20:14:29 -07:00
tunnels.c genetlink: use attrs from struct genl_info 2023-08-15 15:00:45 -07:00
wol.c net: ethtool: re-order local includes 2026-03-20 19:10:18 -07:00