[Bug 96921] New: NULL pointer dereference in lpfc_bus_reset_handler+0xd4/0x240

[bugzilla-daemon@bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=96921

            Bug ID: 96921
           Summary: NULL pointer dereference in
                    lpfc_bus_reset_handler+0xd4/0x240
           Product: SCSI Drivers
           Version: 2.5
    Kernel Version: 3.11.10
          Hardware: x86-64
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: high
          Priority: P1
         Component: Other
          Assignee: scsi_drivers-other@kernel-bugs.osdl.org
          Reporter: joachim.reichelt@helmholtz-hzi.de
        Regression: No

Server crashed. In messages.log I see:

2015-04-18T20:05:01.272964+02:00 nero /USR/SBIN/CRON[81116]:
pam_unix(crond:session): session closed for user root
2015-04-18T20:05:07.198234+02:00 nero kernel: [1593664.788553] ch 8:0:5:2:
timing out command, waited 120s
2015-04-18T20:05:14.296080+02:00 nero kernel: [1593671.881327] lpfc
0000:42:00.0: 2:(0):0713 SCSI layer issued Device Reset (8, 0) return x2002
2015-04-18T20:05:18.261089+02:00 nero kernel: [1593675.843025] lpfc
0000:42:00.0: 2:(0):0723 SCSI layer issued Target Reset (8, 0) return x2002
2015-04-18T20:05:18.310629+02:00 nero kernel: [1593675.845342] BUG: unable to
handle kernel NULL pointer dereference at 000000000000003e
2015-04-18T20:05:18.310646+02:00 nero kernel: [1593675.845731] IP:
[<ffffffffa006a624>] lpfc_bus_reset_handler+0xd4/0x240 [lpfc]
2015-04-18T20:05:18.310648+02:00 nero kernel: [1593675.846029] PGD 0
2015-04-18T20:05:18.310650+02:00 nero kernel: [1593675.846184] Oops: 0000 [#1]
PREEMPT SMP
2015-04-18T20:05:18.310653+02:00 nero kernel: [1593675.846558] Modules linked
in: efs loop binfmt_misc arc4 ecb md4 nls_utf8 cifs md5 nfsd nfs_acl
auth_rpcgss oid_registry nfs fscache lockd sunrpc af_packet dcdbas iTCO_wdt
gpio_ich iTCO_vendor_support xfs x86_pkg_temp_thermal intel_powerclamp coretemp
kvm_intel kvm crc32_pclmul crc32c_intel ghash_clmulni_intel aesni_intel
ablk_helper cryptd lrw gf128mul glue_helper aes_x86_64 pcspkr osst joydev
nls_iso8859_1 nls_cp437 vfat fat ch st sb_edac edac_core lpc_ich mfd_core
mei_me mei ntb bnx2x libcrc32c mdio shpchp wmi acpi_power_meter button mperf sg
dm_mod autofs4 efivarfs mgag200 ttm drm_kms_helper drm i2c_algo_bit sysimgblt
sysfillrect syscopyarea megaraid_sas processor thermal_sys scsi_dh_hp_sw
scsi_dh_emc scsi_dh_rdac scsi_dh_alua scsi_dh lpfc scsi_transport_fc scsi_tgt
2015-04-18T20:05:18.310655+02:00 nero kernel: [1593675.854837] CPU: 1 PID: 804
Comm: scsi_eh_8 Not tainted 3.11.10-25-desktop #1
2015-04-18T20:05:18.310656+02:00 nero kernel: [1593675.854999] Hardware name:
Dell Inc. PowerEdge R820/0YWR73, BIOS 2.0.20 01/16/2014
2015-04-18T20:05:18.310657+02:00 nero kernel: [1593675.855164] task:
ffff883fa0edc580 ti: ffff883fa0ede000 task.ti: ffff883fa0ede000
2015-04-18T20:05:18.318691+02:00 nero kernel: [1593675.855323] RIP:
0010:[<ffffffffa006a624>]  [<ffffffffa006a624>]
lpfc_bus_reset_handler+0xd4/0x240 [lpfc]
2015-04-18T20:05:18.318797+02:00 nero kernel: [1593675.855600] RSP:
0018:ffff883fa0edfd70  EFLAGS: 00010082
2015-04-18T20:05:18.318803+02:00 nero kernel: [1593675.855736] RAX:
0000000000000009 RBX: 0000000000000000 RCX: 00000000000075ed
2015-04-18T20:05:18.318804+02:00 nero kernel: [1593675.855891] RDX:
00000000000075ed RSI: 0000000000000282 RDI: ffff883fa31cb050
2015-04-18T20:05:18.318805+02:00 nero kernel: [1593675.856046] RBP:
ffff883fa31cb708 R08: ffff883fa0ede000 R09: 0000000000000001
2015-04-18T20:05:18.318806+02:00 nero kernel: [1593675.856202] R10:
0000000000000001 R11: 0000000000000004 R12: 0000000000000005
2015-04-18T20:05:18.318807+02:00 nero kernel: [1593675.856359] R13:
0000000000002002 R14: ffff883fa31cb6d8 R15: ffff883fa31cb000
2015-04-18T20:05:18.318808+02:00 nero kernel: [1593675.856521] FS: 
0000000000000000(0000) GS:ffff88403fa00000(0000) knlGS:0000000000000000
2015-04-18T20:05:18.318809+02:00 nero kernel: [1593675.856689] CS:  0010 DS:
0000 ES: 0000 CR0: 0000000080050033
2015-04-18T20:05:18.318810+02:00 nero kernel: [1593675.856830] CR2:
000000000000003e CR3: 0000000006c0e000 CR4: 00000000000407e0
2015-04-18T20:05:18.318812+02:00 nero kernel: [1593675.856994] Stack:
2015-04-18T20:05:18.318814+02:00 nero kernel: [1593675.857261] 
0000020000000002 0000000000000020 a07d53fa90000010 a07d53fa90000020
2015-04-18T20:05:18.318816+02:00 nero kernel: [1593675.857690] 
000000004d261684 ffff883fa31cb000 ffff8822d32818c0 ffffffffa00b1a00
2015-04-18T20:05:18.318817+02:00 nero kernel: [1593675.858125] 
ffff883fa0edca50 0000000000000000 ffff883fa0edfe78 ffffffff813d9a2a
2015-04-18T20:05:18.318818+02:00 nero kernel: [1593675.858542] Call Trace:
2015-04-18T20:05:18.318819+02:00 nero kernel: [1593675.858737] 
[<ffffffff813d9a2a>] scsi_try_bus_reset+0x3a/0x100
2015-04-18T20:05:18.318830+02:00 nero kernel: [1593675.858890] 
[<ffffffff813db2b1>] scsi_eh_ready_devs+0x4d1/0x8f0
2015-04-18T20:05:18.318833+02:00 nero kernel: [1593675.859040] 
[<ffffffff813dc5cd>] scsi_error_handler+0x53d/0x720
2015-04-18T20:05:18.318835+02:00 nero kernel: [1593675.859198] 
[<ffffffff81072c1f>] kthread+0xaf/0xc0
2015-04-18T20:05:18.318895+02:00 nero kernel: [1593675.859340] 
[<ffffffff815af3fc>] ret_from_fork+0x7c/0xb0
2015-04-18T20:05:18.318897+02:00 nero kernel: [1593675.859481] Code: 8b 7f 58
e8 5f de 53 e1 49 8b 9f 08 07 00 00 48 39 dd 75 17 e9 56 01 00 00 66 0f 1f 44
00 00 48 8b 1b 48 39 dd 0f 84 44 01 00 00 <0f> b7 43 3e 83 e0 09 66 83 f8 01 75
e7 49 8b 87 d8 06 00 00 8b
2015-04-18T20:05:18.318899+02:00 nero kernel: [1593675.865079] RIP 
[<ffffffffa006a624>] lpfc_bus_reset_handler+0xd4/0x240 [lpfc]
2015-04-18T20:05:18.323247+02:00 nero kernel: [1593675.865336]  RSP
<ffff883fa0edfd70>
2015-04-18T20:05:18.323342+02:00 nero kernel: [1593675.865456] CR2:
000000000000003e
2015-04-18T20:05:18.323346+02:00 nero kernel: [1593675.889482] ---[ end trace
ac970d32fddfb4ae ]---
2015-04-18T20:05:18.323348+02:00 nero kernel: [1593675.893079] note:
scsi_eh_8[804] exited with preempt_count 1

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