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Message-ID: <20131216090412.GA2230@swordfish.minsk.epam.com>
Date: Mon, 16 Dec 2013 12:04:12 +0300
From: Sergey Senozhatsky <sergey.senozhatsky@...il.com>
To: "David S. Miller" <davem@...emloft.net>
Cc: James Morris <jmorris@...ei.org>,
Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [linux-next] sk->sk_dst_lock inconsistent lock state
Hello,
3.13.0-rc4-next-20131216
[ 114.923321] =================================
[ 114.923324] [ INFO: inconsistent lock state ]
[ 114.923330] 3.13.0-rc4-next-20131216-dbg-dirty #59 Not tainted
[ 114.923333] ---------------------------------
[ 114.923337] inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage.
[ 114.923342] swapper/0/0 [HC0[0]:SC1[1]:HE1:SE0] takes:
[ 114.923346] (&(&sk->sk_dst_lock)->rlock){+.?...}, at: [<ffffffff813a50db>] __udp4_lib_rcv+0x537/0x765
[ 114.923363] {SOFTIRQ-ON-W} state was registered at:
[ 114.923367] [<ffffffff81077272>] __lock_acquire+0xa49/0x1b03
[ 114.923376] [<ffffffff81078aa0>] lock_acquire+0x6f/0x8e
[ 114.923381] [<ffffffff813eba9b>] _raw_spin_lock+0x33/0x3f
[ 114.923390] [<ffffffff813ad834>] inet_bind+0x18b/0x216
[ 114.923397] [<ffffffff8133509e>] SyS_bind+0x7d/0xaa
[ 114.923405] [<ffffffff813ed266>] tracesys+0xd4/0xd9
[ 114.923412] irq event stamp: 1386010
[ 114.923415] hardirqs last enabled at (1386010): [<ffffffff810f5cf0>] kmem_cache_free+0xf0/0x17d
[ 114.923424] hardirqs last disabled at (1386009): [<ffffffff810f5cc4>] kmem_cache_free+0xc4/0x17d
[ 114.923431] softirqs last enabled at (1385998): [<ffffffff81041672>] _local_bh_enable+0x3e/0x40
[ 114.923440] softirqs last disabled at (1385999): [<ffffffff810420f2>] irq_exit+0x52/0xe2
[ 114.923446]
other info that might help us debug this:
[ 114.923450] Possible unsafe locking scenario:
[ 114.923454] CPU0
[ 114.923456] ----
[ 114.923459] lock(&(&sk->sk_dst_lock)->rlock);
[ 114.923464] <Interrupt>
[ 114.923467] lock(&(&sk->sk_dst_lock)->rlock);
[ 114.923472]
*** DEADLOCK ***
[ 114.923478] 2 locks held by swapper/0/0:
[ 114.923480] #0: (rcu_read_lock){.+.+..}, at: [<ffffffff81348a50>] __netif_receive_skb_core+0x1c1/0x9b0
[ 114.923494] #1: (rcu_read_lock){.+.+..}, at: [<ffffffff81379c83>] ip_local_deliver+0x54/0x34b
[ 114.923509]
stack backtrace:
[ 114.923516] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.13.0-rc4-next-20131216-dbg-dirty #59
[ 114.923520] Hardware name: Acer Aspire 5741G /Aspire 5741G , BIOS V1.20 02/08/2011
[ 114.923524] 0000000000000000 ffff880157c03a58 ffffffff813e57ff ffffffff81612490
[ 114.923533] ffff880157c03aa8 ffffffff813e2e0c 0000000000000001 ffff880100000001
[ 114.923542] ffffffff00000000 ffffffff81612b70 0000000000000004 0000000000000006
[ 114.923551] Call Trace:
[ 114.923554] <IRQ> [<ffffffff813e57ff>] dump_stack+0x4e/0x7a
[ 114.923566] [<ffffffff813e2e0c>] print_usage_bug+0x2b1/0x31c
[ 114.923574] [<ffffffff81075203>] ? print_irq_inversion_bug+0x234/0x234
[ 114.923580] [<ffffffff81075e9e>] mark_lock+0x341/0x698
[ 114.923586] [<ffffffff81077200>] __lock_acquire+0x9d7/0x1b03
[ 114.923594] [<ffffffff813b9597>] ? check_leaf.isra.10+0x20d/0x20d
[ 114.923601] [<ffffffff81078aa0>] lock_acquire+0x6f/0x8e
[ 114.923608] [<ffffffff813a50db>] ? __udp4_lib_rcv+0x537/0x765
[ 114.923614] [<ffffffff813eba9b>] _raw_spin_lock+0x33/0x3f
[ 114.923620] [<ffffffff813a50db>] ? __udp4_lib_rcv+0x537/0x765
[ 114.923627] [<ffffffff813a50db>] __udp4_lib_rcv+0x537/0x765
[ 114.923633] [<ffffffff813a58f5>] udp_rcv+0x15/0x17
[ 114.923640] [<ffffffff81379e03>] ip_local_deliver+0x1d4/0x34b
[ 114.923646] [<ffffffff81379c83>] ? ip_local_deliver+0x54/0x34b
[ 114.923653] [<ffffffff8137a58d>] ip_rcv+0x613/0x6a3
[ 114.923659] [<ffffffff8134919f>] __netif_receive_skb_core+0x910/0x9b0
[ 114.923665] [<ffffffff81348a50>] ? __netif_receive_skb_core+0x1c1/0x9b0
[ 114.923674] [<ffffffff81009275>] ? read_tsc+0x9/0x1b
[ 114.923680] [<ffffffff81349252>] __netif_receive_skb+0x13/0x55
[ 114.923686] [<ffffffff81349369>] netif_receive_skb+0xd5/0x1b8
[ 114.923693] [<ffffffff81349c9a>] napi_gro_receive+0x26/0x66
[ 114.923705] [<ffffffffa0177027>] tg3_poll_work+0x878/0xc80 [tg3]
[ 114.923716] [<ffffffffa0177719>] tg3_poll+0x19f/0x352 [tg3]
[ 114.923723] [<ffffffff8134a3fd>] net_rx_action+0xec/0x1c0
[ 114.923729] [<ffffffff81041c86>] __do_softirq+0xfe/0x254
[ 114.923735] [<ffffffff810420f2>] irq_exit+0x52/0xe2
[ 114.923743] [<ffffffff810041c1>] do_IRQ+0x97/0xae
[ 114.923751] [<ffffffff813ec7b2>] common_interrupt+0x72/0x72
[ 114.923754] <EOI> [<ffffffff8132005d>] ? cpuidle_enter_state+0x54/0xb0
[ 114.923767] [<ffffffff8132018c>] cpuidle_idle_call+0xd3/0x11c
[ 114.923774] [<ffffffff8100aab1>] arch_cpu_idle+0x9/0x23
[ 114.923781] [<ffffffff8108508f>] cpu_startup_entry+0xdf/0x164
[ 114.923788] [<ffffffff813ddfe9>] rest_init+0x12d/0x131
[ 114.923794] [<ffffffff813ddebc>] ? csum_partial_copy_generic+0x16c/0x16c
[ 114.923802] [<ffffffff81685d64>] start_kernel+0x3e2/0x3ee
[ 114.923808] [<ffffffff81685790>] ? repair_env_string+0x58/0x58
[ 114.923816] [<ffffffff81685120>] ? early_idt_handlers+0x120/0x120
[ 114.923823] [<ffffffff81685498>] x86_64_start_reservations+0x2a/0x2c
[ 114.923830] [<ffffffff81685588>] x86_64_start_kernel+0xee/0xfb
-ss
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