Messages in this thread | | | Subject | 3.3.0-rc6-next20120305 net/ipv4/tcp_ipv4.c:930 suspicious rcu_dereference_check() usage! | From | Valdis.Kletnieks@vt ... | Date | Wed, 07 Mar 2012 08:25:26 -0500 |
| |
Seen in my dmesg. Dell Latitude E6500.
[ 164.842511] [ 164.842522] =============================== [ 164.842528] [ INFO: suspicious RCU usage. ] [ 164.842538] 3.3.0-rc6-next-20120305 #1 Tainted: G O [ 164.842544] ------------------------------- [ 164.842552] net/ipv4/tcp_ipv4.c:930 suspicious rcu_dereference_check() usage! [ 164.842559] [ 164.842560] other info that might help us debug this: [ 164.842563] [ 164.842570] [ 164.842571] rcu_scheduler_active = 1, debug_locks = 1 [ 164.842579] 2 locks held by ksoftirqd/1/10: [ 164.842586] #0: (&icsk->icsk_retransmit_timer){+.-...}, at: [<ffffffff81039086>] run_timer_softirq+0x17f/0x3e7 [ 164.842620] #1: (slock-AF_INET){+.-...}, at: [<ffffffff814b75b3>] tcp_write_timer+0x1a/0x17b [ 164.842649] [ 164.842651] stack backtrace: [ 164.842660] Pid: 10, comm: ksoftirqd/1 Tainted: G O 3.3.0-rc6-next-20120305 #1 [ 164.842668] Call Trace: [ 164.842685] [<ffffffff8106e6a2>] lockdep_rcu_suspicious+0xec/0xf5 [ 164.842698] [<ffffffff814b7f40>] tcp_md5_do_lookup+0x60/0xbe [ 164.842710] [<ffffffff814b7fc0>] tcp_v4_md5_lookup+0xe/0x10 [ 164.842725] [<ffffffff814b2eb5>] tcp_established_options+0x32/0x110 [ 164.842739] [<ffffffff814b42d7>] tcp_current_mss+0x50/0x6f [ 164.842753] [<ffffffff814b5c50>] tcp_retransmit_skb+0xa9/0x510 [ 164.842766] [<ffffffff814ab727>] ? tcp_set_ca_state+0x23/0x2f [ 164.842779] [<ffffffff814b73ee>] tcp_retransmit_timer+0x376/0x521 [ 164.842791] [<ffffffff814b7638>] tcp_write_timer+0x9f/0x17b [ 164.842804] [<ffffffff8103915e>] run_timer_softirq+0x257/0x3e7 [ 164.842816] [<ffffffff81039086>] ? run_timer_softirq+0x17f/0x3e7 [ 164.842828] [<ffffffff814b7599>] ? tcp_retransmit_timer+0x521/0x521 [ 164.842843] [<ffffffff81032207>] __do_softirq+0x10a/0x25f [ 164.842857] [<ffffffff81032411>] run_ksoftirqd+0xb5/0x200 [ 164.842869] [<ffffffff8103235c>] ? __do_softirq+0x25f/0x25f [ 164.842884] [<ffffffff810499bd>] kthread+0x86/0x8e [ 164.842900] [<ffffffff815e2434>] kernel_thread_helper+0x4/0x10 [ 164.842914] [<ffffffff815db41d>] ? retint_restore_args+0xe/0xe [ 164.842928] [<ffffffff81049937>] ? flush_kthread_worker+0xcf/0xcf [ 164.842941] [<ffffffff815e2430>] ? gs_change+0xb/0xb
[unhandled content-type:application/pgp-signature] | |