A commit added in the 3.8-rc1 merge window has resulted in
my kernel config entering an infinite loop handling the
"Default SCTP cookie HMAC encoding" option.
commit 0d0863b02002c25140a1b9e113b81211bcc780e8
sctp: Change defaults on cookie hmac selection
http://marc.info/?l=linux-netdev&m=135553459303505
The problem lies in my config file containing this line:
CONFIG_SCTP_HMAC_MD5=y
I normally configure my kernel using fixed config file
(occasionally updated) using (roughly) this:
yes "" | make oldconfig
The result looks like this:
. . .
DCCP connection probing (NET_DCCPPROBE) [M/n/?] m
*
* The SCTP Protocol (EXPERIMENTAL)
*
The SCTP Protocol (EXPERIMENTAL) (IP_SCTP) [M/y/?] m
SCTP: Association probing (NET_SCTPPROBE) [M/n/?] m
SCTP: Debug messages (SCTP_DBG_MSG) [N/y/?] n
SCTP: Debug object counts (SCTP_DBG_OBJCNT) [N/y/?] n
Default SCTP cookie HMAC encoding
1. Enable optional MD5 hmac cookie generation
(SCTP_DEFAULT_COOKIE_HMAC_MD5) (NEW)
2. Enable optional SHA1 hmac cookie generation
(SCTP_DEFAULT_COOKIE_HMAC_SHA1) (NEW)
3. Use no hmac alg in SCTP cookie generation
(SCTP_DEFAULT_COOKIE_HMAC_NONE) (NEW)
choice[1-3?]: Default SCTP cookie HMAC encoding
1. Enable optional MD5 hmac cookie generation
(SCTP_DEFAULT_COOKIE_HMAC_MD5) (NEW)
2. Enable optional SHA1 hmac cookie generation
(SCTP_DEFAULT_COOKIE_HMAC_SHA1) (NEW)
3. Use no hmac alg in SCTP cookie generation
(SCTP_DEFAULT_COOKIE_HMAC_NONE) (NEW)
choice[1-3?]: Default SCTP cookie HMAC encoding
. . . and so on.
I find that I can correct this with the patch below.
I expect others will bump into the same problem. In
particular, I notice my Ubuntu config files contain
that same line.
I don't know how best to handle this, but I thought
I would report it in case someone has a good solution.
-Alex
arch/x86/configs/autobuild | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
Index: b/arch/x86/configs/autobuild
===================================================================
--- a/arch/x86/configs/autobuild
+++ b/arch/x86/configs/autobuild
@@ -940,7 +940,7 @@ CONFIG_NET_SCTPPROBE=m
# CONFIG_SCTP_DBG_OBJCNT is not set
# CONFIG_SCTP_HMAC_NONE is not set
# CONFIG_SCTP_HMAC_SHA1 is not set
-CONFIG_SCTP_HMAC_MD5=y
+CONFIG_SCTP_DEFAULT_COOKIE_HMAC_MD5=y
CONFIG_RDS=m
CONFIG_RDS_RDMA=m
CONFIG_RDS_TCP=m
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