https://github.com/torvalds/linux
Revision bc5b6c0b62b932626a135f516a41838c510c6eba authored by Jeremy Cline on 31 July 2018, 21:13:16 UTC, committed by David S. Miller on 01 August 2018, 16:50:58 UTC
'protocol' is a user-controlled value, so sanitize it after the bounds
check to avoid using it for speculative out-of-bounds access to arrays
indexed by it.

This addresses the following accesses detected with the help of smatch:

* net/netlink/af_netlink.c:654 __netlink_create() warn: potential
  spectre issue 'nlk_cb_mutex_keys' [w]

* net/netlink/af_netlink.c:654 __netlink_create() warn: potential
  spectre issue 'nlk_cb_mutex_key_strings' [w]

* net/netlink/af_netlink.c:685 netlink_create() warn: potential spectre
  issue 'nl_table' [w] (local cap)

Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Jeremy Cline <jcline@redhat.com>
Reviewed-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
1 parent e02ee98
History
Tip revision: bc5b6c0b62b932626a135f516a41838c510c6eba authored by Jeremy Cline on 31 July 2018, 21:13:16 UTC
netlink: Fix spectre v1 gadget in netlink_create()
Tip revision: bc5b6c0
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