The patch titled
SCTP: ipv6: inconsistent lock state ipv6_add_addr/sctp_v6_copy_addrlist
has been added to the -mm tree. Its filename is
sctp-ipv6-inconsistent-lock-state-ipv6_add_addr-sctp_v6_copy_addrlist.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: SCTP: ipv6: inconsistent lock state ipv6_add_addr/sctp_v6_copy_addrlist
From: Jarek Poplawski <jarkao2@xxxxx>
lockdep found that dev->lock taken from softirq in ipv6_add_addr is also
taken in sctp_v6_copy_addrlist with softirqs enabled, so lockup is
possible.
Noticed-by: Simon Arlott <simon@xxxxxxxxxx>
Signed-off-by: Jarek Poplawski <jarkao2@xxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
net/sctp/ipv6.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff -puN net/sctp/ipv6.c~sctp-ipv6-inconsistent-lock-state-ipv6_add_addr-sctp_v6_copy_addrlist net/sctp/ipv6.c
--- a/net/sctp/ipv6.c~sctp-ipv6-inconsistent-lock-state-ipv6_add_addr-sctp_v6_copy_addrlist
+++ a/net/sctp/ipv6.c
@@ -360,7 +360,7 @@ static void sctp_v6_copy_addrlist(struct
return;
}
- read_lock(&in6_dev->lock);
+ read_lock_bh(&in6_dev->lock);
for (ifp = in6_dev->addr_list; ifp; ifp = ifp->if_next) {
/* Add the address to the local list. */
addr = t_new(struct sctp_sockaddr_entry, GFP_ATOMIC);
@@ -374,7 +374,7 @@ static void sctp_v6_copy_addrlist(struct
}
}
- read_unlock(&in6_dev->lock);
+ read_unlock_bh(&in6_dev->lock);
rcu_read_unlock();
}
_
Patches currently in -mm which might be from jarkao2@xxxxx are
sctp-ipv6-inconsistent-lock-state-ipv6_add_addr-sctp_v6_copy_addrlist.patch
-
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
