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a770bf5156
linux/net/ethtool
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Michal Kubecek a770bf5156 ethtool: fix stack overflow in ethnl_parse_bitset() 
Syzbot reported a stack overflow in bitmap_from_arr32() called from
ethnl_parse_bitset() when bitset from netlink message is longer than
target bitmap length. While ethnl_compact_sanity_checks() makes sure that
trailing part is all zeros (i.e. the request does not try to touch bits
kernel does not recognize), we also need to cap change_bits to nbits so
that we don't try to write past the prepared bitmaps.

Fixes: 88db6d1e4f ("ethtool: add ethnl_parse_bitset() helper")
Reported-by: syzbot+9d39fa49d4df294aab93@syzkaller.appspotmail.com
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Link: https://lore.kernel.org/r/3487ee3a98e14cd526f55b6caaa959d2dcbcad9f.1607465316.git.mkubecek@suse.cz
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-12-09 15:50:38 -08:00
..
bitset.c ethtool: fix stack overflow in ethnl_parse_bitset() 2020-12-09 15:50:38 -08:00
bitset.h ethtool: add ethnl_parse_bitset() helper 2020-03-12 15:32:32 -07:00
cabletest.c ethtool: link up ethnl_header_policy as a nested policy 2020-10-06 06:25:55 -07:00
channels.c ethtool: link up ethnl_header_policy as a nested policy 2020-10-06 06:25:55 -07:00
coalesce.c ethtool: link up ethnl_header_policy as a nested policy 2020-10-06 06:25:55 -07:00
common.c ethtool: Add 100base-FX link mode entries 2020-09-19 16:54:35 -07:00
common.h ethtool: add tunnel info interface 2020-07-10 13:54:00 -07:00
debug.c ethtool: link up ethnl_header_policy as a nested policy 2020-10-06 06:25:55 -07:00
eee.c ethtool: link up ethnl_header_policy as a nested policy 2020-10-06 06:25:55 -07:00
features.c ethtool: netlink: add missing netdev_features_change() call 2020-11-09 17:15:34 -08:00
ioctl.c ethtool: allow netdev driver to define phy tunables 2020-10-06 06:16:01 -07:00
linkinfo.c ethtool: link up ethnl_header_policy as a nested policy 2020-10-06 06:25:55 -07:00
linkmodes.c ethtool: link up ethnl_header_policy as a nested policy 2020-10-06 06:25:55 -07:00
linkstate.c ethtool: link up ethnl_header_policy as a nested policy 2020-10-06 06:25:55 -07:00
Makefile ethtool: add tunnel info interface 2020-07-10 13:54:00 -07:00
netlink.c ethtool: correct policy for ETHTOOL_MSG_CHANNELS_SET 2020-10-08 16:06:01 -07:00
netlink.h ethtool: strset: allow ETHTOOL_A_STRSET_COUNTS_ONLY attr 2020-10-08 16:06:01 -07:00
pause.c ethtool: specify which header flags are supported per command 2020-10-06 06:25:55 -07:00
privflags.c ethtool: link up ethnl_header_policy as a nested policy 2020-10-06 06:25:55 -07:00
rings.c ethtool: link up ethnl_header_policy as a nested policy 2020-10-06 06:25:55 -07:00
strset.c ethtool: strset: allow ETHTOOL_A_STRSET_COUNTS_ONLY attr 2020-10-08 16:06:01 -07:00
tsinfo.c ethtool: link up ethnl_header_policy as a nested policy 2020-10-06 06:25:55 -07:00
tunnels.c ethtool: link up ethnl_header_policy as a nested policy 2020-10-06 06:25:55 -07:00
wol.c ethtool: link up ethnl_header_policy as a nested policy 2020-10-06 06:25:55 -07:00