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| author | Eric Dumazet <eric.dumazet@gmail.com> | 2010-06-06 23:48:40 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-06-07 02:57:14 -0700 |
| commit | 035320d54758e21227987e3aae0d46e7a04f4ddc (patch) | |
| tree | 9ad66a45ab0b0d903ebcbe435894d1fb9d5d78f5 /net/ipv4/ipmr.c | |
| parent | 3fd7fa4a89f0b85b9b33e922f15a2289c0fb8499 (diff) | |
| download | lwn-035320d54758e21227987e3aae0d46e7a04f4ddc.tar.gz lwn-035320d54758e21227987e3aae0d46e7a04f4ddc.zip | |
ipmr: dont corrupt lists
ipmr_rules_exit() and ip6mr_rules_exit() free a list of items, but
forget to properly remove these items from list. List head is not
changed and still points to freed memory.
This can trigger a fault later when icmpv6_sk_exit() is called.
Fix is to either reinit list, or use list_del() to properly remove items
from list before freeing them.
bugzilla report : https://bugzilla.kernel.org/show_bug.cgi?id=16120
Introduced by commit d1db275dd3f6e4 (ipv6: ip6mr: support multiple
tables) and commit f0ad0860d01e (ipv4: ipmr: support multiple tables)
Reported-by: Alex Zhavnerchik <alex.vizor@gmail.com>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
CC: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/ipmr.c')
| -rw-r--r-- | net/ipv4/ipmr.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c index 856123fe32f9..757f25eb9b4b 100644 --- a/net/ipv4/ipmr.c +++ b/net/ipv4/ipmr.c @@ -267,8 +267,10 @@ static void __net_exit ipmr_rules_exit(struct net *net) { struct mr_table *mrt, *next; - list_for_each_entry_safe(mrt, next, &net->ipv4.mr_tables, list) + list_for_each_entry_safe(mrt, next, &net->ipv4.mr_tables, list) { + list_del(&mrt->list); kfree(mrt); + } fib_rules_unregister(net->ipv4.mr_rules_ops); } #else |