From mboxrd@z Thu Jan 1 00:00:00 1970 From: Valdis.Kletnieks@vt.edu Subject: 3.3.0-rc6-next20120305 net/ipv4/tcp_ipv4.c:930 suspicious rcu_dereference_check() usage! Date: Wed, 07 Mar 2012 08:25:26 -0500 Message-ID: <30475.1331126726@turing-police.cc.vt.edu> Mime-Version: 1.0 Content-Type: multipart/signed; boundary="==_Exmh_1331126726_3519P"; micalg=pgp-sha1; protocol="application/pgp-signature" Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org To: "David S. Miller" Return-path: Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org --==_Exmh_1331126726_3519P Content-Type: text/plain; charset=us-ascii 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: [] run_timer_softirq+0x17f/0x3e7 [ 164.842620] #1: (slock-AF_INET){+.-...}, at: [] 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] [] lockdep_rcu_suspicious+0xec/0xf5 [ 164.842698] [] tcp_md5_do_lookup+0x60/0xbe [ 164.842710] [] tcp_v4_md5_lookup+0xe/0x10 [ 164.842725] [] tcp_established_options+0x32/0x110 [ 164.842739] [] tcp_current_mss+0x50/0x6f [ 164.842753] [] tcp_retransmit_skb+0xa9/0x510 [ 164.842766] [] ? tcp_set_ca_state+0x23/0x2f [ 164.842779] [] tcp_retransmit_timer+0x376/0x521 [ 164.842791] [] tcp_write_timer+0x9f/0x17b [ 164.842804] [] run_timer_softirq+0x257/0x3e7 [ 164.842816] [] ? run_timer_softirq+0x17f/0x3e7 [ 164.842828] [] ? tcp_retransmit_timer+0x521/0x521 [ 164.842843] [] __do_softirq+0x10a/0x25f [ 164.842857] [] run_ksoftirqd+0xb5/0x200 [ 164.842869] [] ? __do_softirq+0x25f/0x25f [ 164.842884] [] kthread+0x86/0x8e [ 164.842900] [] kernel_thread_helper+0x4/0x10 [ 164.842914] [] ? retint_restore_args+0xe/0xe [ 164.842928] [] ? flush_kthread_worker+0xcf/0xcf [ 164.842941] [] ? gs_change+0xb/0xb --==_Exmh_1331126726_3519P Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) Comment: Exmh version 2.5 07/13/2001 iQIVAwUBT1dhxgdmEQWDXROgAQK2UxAAqUt22B1GOx7sxbc70lHTk7qkb4EseU3K C44uK+sYu4ijy3uEx7CUgXcWXZeuG39ULaKTAYjYETw2DmKXC1MeA6UxgXXHxqm1 opiZ9rhoN7cdXSx4EOsBO3EQesoR/xNdafIapZRoJTxUQQDwekCtVFUM4iPuM8XN UVL0jLZ27VFEO6SaOLy/SUl3TnRTIbV+BcG5y1FQAWQqXG2ygbmXsoKBTzQuqFna s/EGfZyYdow49HM40EeBpFNsKa46fCc+c1R/fofKehpl0hofpa7n7LtN+GHZRkIT SdsC8M1871svl2vrW/bMeSU8+hYMWcjU8q9pjv6AybJQJfcZvI1kBVmeIUSGpZNy Sq384V1DwdF7Tgj8vqnKDqzw2Hzaay7jl4T8qGWvV4l613gKELZcgXzXW/r63Wdr rfKRn2bCIKP/urwPFJwUBjjLMjst6IPHs06xj1FnFs+ZkJ4gBcPFvyDn+W7JXdw5 I5jgQLF+Mib4Esezh4AWUtCTej4NegZJicGwpL4nVKtnntfQFJvzp/zy6HkTIR5p VrmdwndXq9Hj8Lkyu+aDDRLWw4+g5RnpwPdDU0G6SxF1SOQES4Il1xC7r33Jec52 s6QZ+f8RtRKKNV+vWvErhCau+GBHJCPC5i7efJHLpXDwxsphKE32luAa1wOqnDWQ TBj0KbRj8ZM= =Yj46 -----END PGP SIGNATURE----- --==_Exmh_1331126726_3519P--