linux-kernel - GPF in __call_for_each

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Date:	Thu, 31 Mar 2011 18:30:34 -0400
From:	Dave Jones <davej@...hat.com>
To:	Linux Kernel <linux-kernel@...r.kernel.org>
Cc:	axboe@...nel.dk
Subject: GPF in __call_for_each_cic

Just hit this on current git head.

	Dave

 general protection fault: 0000 [#1] SMP 
 last sysfs file: /sys/devices/system/cpu/cpu1/cache/index2/shared_cpu_map
 CPU 0 
 Modules linked in: cmtp kernelcapi can_bcm rfcomm sctp libcrc32c hidp bnep af_802154 ipx p8022 p8023 rds phonet decnet pppoe pppox ppp_generic slhc appletalk psnap llc af_key can rose ax25 irda crc_ccitt atm tun tcp_lp nfs fscache fuse nfsd lockd nfs_acl auth_rpcgss sunrpc cpufreq_ondemand acpi_cpufreq freq_table mperf ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables ipv6 uinput arc4 iwlagn mac80211 snd_hda_codec_hdmi snd_hda_codec_idt snd_hda_intel snd_usb_audio snd_hda_codec btusb bluetooth snd_seq uvcvideo snd_pcm dell_wmi cfg80211 sparse_keymap snd_hwdep zaurus snd_usbmidi_lib videodev dell_laptop snd_rawmidi snd_timer cdc_ether dcdbas snd_seq_device usbnet microcode v4l2_compat_ioctl32 mii cdc_acm snd cdc_wdm iTCO_wdt joydev tg3 rfkill i2c_i801 pcspkr iTCO_vendor_support soundcore snd_page_alloc wmi i915 drm_kms_helper drm i2c_algo_bit i2c_core video [last unloaded: scsi_wait_scan]
 
 Pid: 14365, comm: trinity Not tainted 2.6.38-09065-g89078d5-dirty #6 Dell Inc. Adamo 13   /0N70T0
 RIP: 0010:[<ffffffff8125703b>]  [<ffffffff8125703b>] __call_for_each_cic+0x32/0x51
 RSP: 0018:ffff880007c05e28  EFLAGS: 00010202
 RAX: 0000000000000001 RBX: ffff88010e48abd0 RCX: 0000042c0d869707
 RDX: 0000000000000246 RSI: ffffffff81a268f0 RDI: 0000000000000246
 RBP: ffff880007c05e48 R08: 0000000000000286 R09: 0000000000000001
 R10: ffff88010e48abf8 R11: ffffffff8125893b R12: ffffffff8125708a
 R13: 6b6b6b6b6b6b6b6b R14: ffff880007c05c08 R15: 0000000000000001
 FS:  0000000000000000(0000) GS:ffff88013fa00000(0000) knlGS:0000000000000000
 CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
 CR2: 000000000157ea88 CR3: 0000000001a03000 CR4: 00000000000406f0
 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
 Process trinity (pid: 14365, threadinfo ffff880007c04000, task ffff88007c99a3b0)
 Stack:
  ffff880007c05c08 ffff88010e48abd0 ffff88007c99a3b0 ffff88007c99a980
  ffff880007c05e58 ffffffff8125706f ffff880007c05e78 ffffffff8124c70c
  ffff880007c05e78 ffff88010e48abd0 ffff880007c05ea8 ffffffff8124c798
 Call Trace:
  [<ffffffff8125706f>] cfq_free_io_context+0x15/0x17
  [<ffffffff8124c70c>] put_io_context+0x44/0x61
  [<ffffffff8124c798>] exit_io_context+0x6f/0x77
  [<ffffffff8105e9c6>] do_exit+0x759/0x780
  [<ffffffff814cdaf7>] ? schedule+0x6d9/0x70b
  [<ffffffff8105ec67>] do_group_exit+0x88/0xb6
  [<ffffffff8105ecac>] sys_exit_group+0x17/0x1b
  [<ffffffff814d6bc2>] system_call_fastpath+0x16/0x1b
 Code: 54 53 48 83 ec 08 0f 1f 44 00 00 4c 8b af 80 00 00 00 48 89 fb 49 89 f4 e8 e3 db e1 ff 85 c0 74 05 e8 ac ff ff ff 4d 85 ed 74 17 
  8b 45 00 49 8d 75 b0 48 89 df 0f 18 08 41 ff d4 4d 8b 6d 00 
 RIP  [<ffffffff8125703b>] __call_for_each_cic+0x32/0x51
  RSP <ffff880007c05e28>
 ---[ end trace 044e02f5767b491a ]---
 Fixing recursive fault but reboot is needed!

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