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19a0804026
Fix the following crash triggered by FCoE initiator login: BUG: unable to handle kernel NULL pointer dereference at 0000000000000002 IP: [<ffffffffa04b282b>] ft_prli+0x4b/0x350 [fcst] PGD 1a7ba4067 PUD 1a7ba3067 PMD 0 Oops: 0000 [#1] SMP CPU 0 Modules linked in: netconsole configfs ib_srpt fcst scst_vdisk scst crc32c libcrc32c fcoe libfcoe libfc scsi_transport_fc snd_pcm_oss snd_mixer_oss snd_seq snd_seq_device af_packet rdma_ucm rdma_cm iw_cm ib_addr ib_ipoib ib_cm ib_sa ib_uverbs ib_umad mlx4_ib ib_mad ib_core microcode cpufreq_conservative cpufreq_userspace cpufreq_powersave acpi_cpufreq mperf dm_mod snd_hda_codec_hdmi snd_hda_codec_analog snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_timer snd intel_agp mlx4_core sr_mod sg intel_gtt cdrom soundcore i2c_i801 agpgart snd_page_alloc i2c_core pcspkr button uhci_hcd sd_mod crc_t10dif ehci_hcd usbcore edd ext3 mbcache jbd fan ata_generic ata_piix pata_marvell ahci libahci libata scsi_mod thermal processor thermal_sys hwmon [last unloaded: scst] Pid: 3562, comm: fcoethread/0 Not tainted 3.1.5-debug+ #1 System manufacturer P5Q DELUXE/P5Q DELUXE RIP: 0010:[<ffffffffa04b282b>] [<ffffffffa04b282b>] ft_prli+0x4b/0x350 [fcst] RSP: 0018:ffff8801a6273b70 EFLAGS: 00010282 RAX: ffff8801a6273fd8 RBX: 0000000000000000 RCX: 0000000000000006 RDX: 0000000000000001 RSI: 2222222222222222 RDI: 2222222222222222 RBP: ffff8801a6273be0 R08: 2222222222222222 R09: 2222222222222222 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 R13: ffff8801a6291c7c R14: ffff8801a6290800 R15: ffff8801a6290848 FS: 0000000000000000(0000) GS:ffff8801bfc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: 0000000000000002 CR3: 00000001a7ba1000 CR4: 00000000000406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process fcoethread/0 (pid: 3562, threadinfo ffff8801a6272000, task ffff8801b13ecce0) Stack: ffff8801a6273bc0 ffffffff812f7593 00000000000000c0 ffff8801b9002a00 0000000000000100 000000000000002c 0000000000000000 ffff8801ae1a4a18 ffff8801b1a1d600 ffff8801a6290800 ffff8801b1a1ce00 ffff8801ae1a4a18 Call Trace: [<ffffffff812f7593>] ? __alloc_skb+0x83/0x170 [<ffffffffa03b95ec>] fc_rport_enter_prli+0xec/0x220 [libfc] [<ffffffffa03ba531>] fc_rport_recv_req+0x541/0x1280 [libfc] [<ffffffff81082e8d>] ? trace_hardirqs_on_caller+0x11d/0x1b0 [<ffffffff813d44ad>] ? mutex_lock_nested+0x26d/0x330 [<ffffffffa03b6c00>] ? fc_lport_recv_els_req+0x30/0x140 [libfc] [<ffffffffa03b6c1f>] fc_lport_recv_els_req+0x4f/0x140 [libfc] [<ffffffffa03b5f14>] fc_lport_recv_req+0x174/0x230 [libfc] [<ffffffffa03b5dd1>] ? fc_lport_recv_req+0x31/0x230 [libfc] [<ffffffff81082f2d>] ? trace_hardirqs_on+0xd/0x10 [<ffffffffa03b2f6c>] fc_exch_recv+0x63c/0xe50 [libfc] [<ffffffffa03ce3b8>] fcoe_recv_frame+0x1d8/0x410 [fcoe] [<ffffffff81082e8d>] ? trace_hardirqs_on_caller+0x11d/0x1b0 [<ffffffffa03ceaf8>] ? fcoe_percpu_receive_thread+0x68/0xf0 [fcoe] [<ffffffff8104caf7>] ? local_bh_enable_ip+0x87/0xf0 [<ffffffffa03ceb00>] fcoe_percpu_receive_thread+0x70/0xf0 [fcoe] [<ffffffffa03cea90>] ? fcoe_rcv+0x450/0x450 [fcoe] [<ffffffff81069656>] kthread+0x96/0xa0 [<ffffffff813e0b74>] kernel_thread_helper+0x4/0x10 [<ffffffff813d6d9d>] ? retint_restore_args+0xe/0xe [<ffffffff810695c0>] ? __init_kthread_worker+0x70/0x70 [<ffffffff813e0b70>] ? gs_change+0xb/0xb Code: 90 f6 05 e8 2c 00 00 02 49 89 fe 48 89 d3 49 89 cd 0f 85 8e 02 00 00 31 f6 48 c7 c7 00 50 4b a0 41 bc 04 00 00 00 e8 15 1a f2 e0 <0f> b6 43 02 a8 c0 75 65 8b 4b 0c 41 b4 08 0f c9 f6 c1 30 74 58 RIP [<ffffffffa04b282b>] ft_prli+0x4b/0x350 [fcst] RSP <ffff8801a6273b70> CR2: 0000000000000002 ---[ end trace c06e7c64e9c18831 ]--- BSD-signed-off-by: Bart Van Assche <bvanassche@acm.org> Reviewed-by: Yi Zou <yi.zou@intel.com> git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@4025 d57e44dd-8a1f-0410-8b47-8ef2f437770f
This is the SCST development repository. It contains not a single project SCST as one can think, but a number of them, which are divided as the following: 1. SCST core in scst/ subdirectory 2. Administration utility for SCST core scstadmin in scstadmin/ 3. Target drivers in own subdirectories qla2x00t/, iscsi-scst/, etc. 4. User space programs in usr/ subdirectory, like fileio_tgt. 5. Some various docs in doc/ subdirectory. Those subprojects are in most cases independent from each other, although some of them depend from the SCST core. They put in the single repository only to simplify their development, they are released independently. Thus, use "make all" only if you really need to build everything. Otherwise build only what you need, like for iSCSI-SCST: make scst scst_install iscsi iscsi_install For more information about each subproject see their README files. Vladislav Bolkhovitin <vst@vlnb.net>, http://scst.sourceforge.net