On "what was the actual error": it is deref of an invalid address, not NULL. Attaching crash dump analysis for the reference. On module reference count: good point. I decided against it at first, but I can reconsider. "modprobe -r qla2xxx" will fail if there is an extra reference to the module, and the module_exit function will not even run, right? Waiting for references to go away would be more convenient for me. But I can see why the module reference count is a better approach in general. I can work around and retry "modprobe -r qla2xxx" multiple times in my scripts. I think that it is still a SCSI mid-layer job to do the references. There is no way qla2xxx can reference itself and then dereference at the right time. qla2xxx (or any other driver) provides a pointer to its module in scsi_host_template when it requests Scsi_Host creation. As far as I can see, no one ever takes a reference on that module. SCSI mid-layer just relies on the module to be around. Scsi_Host is a device itself; that is the device that is referenced on open/close from user mode, and not the bus driver that triggered the Scsi_Host creation. SCSI mid layer taking a reference on the template's module at Scsi_Host creation in scsi_host_alloc(..) and dropping it in scsi_host_dev_release (called when the last reference to Scsi_Host is gone) will not work. Assuming that the module_exit function does not run at an attempt to unload a referenced module, qla2xxx's Scsi_Host-s corresponding to the adapter's ports will stay forever. Let me think more about it; the idea is to intercept open/close at Scsi_Host and increment/decrement module reference at that time. Thanks a lot for the input! On Wed, Apr 11, 2018 at 1:12 PM, James Bottomley <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx> wrote: > On Wed, 2018-04-11 at 12:22 -0700, Anatoliy Glagolev wrote: >> Hannes, James, thanks a lot for taking a look! >> >> On the problem the patch is solving: it is in the "Description" part >> of my initial e-mail. If you agree that a Scsi_Host may be around >> after a driver has unloaded, the problem applies to any driver >> creating a new Scsi_Host. > > No, I don't agree: as I said, the template is part of the module and > the module should be reference counted. Any use after free of the > template means there's a refcounting bug somewhere. > >> I fixed it in qla2xxx to illustrate the usage of the new function >> and scsi_host_template's flag; also, qla2xxx is where I actually >> observe crashes. Other drivers may do the same if they want to >> address the problem. >> >> Here are details on the qla2xxx crash repro, if that is what you were >> asking about. If I run "qaucli" utility that retrieves some info from >> the driver via SCSI mid-layer, and unload the driver in parallel, the >> kernel crashes with the following stack: >> >> [16834.636216,07] Call Trace: >> ... >> scsi_proc_hostdir_rm >> [16834.641944,07] [<ffffffff8141723f>] >> scsi_host_dev_release+0x3f/0x130 >> [16834.647740,07] [<ffffffff813e4f82>] device_release+0x32/0xa0 >> [16834.653423,07] [<ffffffff812dc6c7>] kobject_cleanup+0x77/0x190 >> [16834.659002,07] [<ffffffff812dc585>] kobject_put+0x25/0x50 >> [16834.664430,07] [<ffffffff813e5277>] put_device+0x17/0x20 >> [16834.669740,07] [<ffffffff812d0334>] >> bsg_kref_release_function+0x24/0x30 >> [16834.675007,07] [<ffffffff812d14a6>] bsg_release+0x166/0x1d0 >> [16834.680148,07] [<ffffffff8119ba2b>] __fput+0xcb/0x1d0 >> [16834.685156,07] [<ffffffff8119bb6e>] ____fput+0xe/0x10 >> [16834.690017,07] [<ffffffff81077476>] task_work_run+0x86/0xb0 >> [16834.694781,07] [<ffffffff81057043>] >> exit_to_usermode_loop+0x6b/0x9a >> [16834.699466,07] [<ffffffff81002875>] >> syscall_return_slowpath+0x55/0x60 >> [16834.704110,07] [<ffffffff8172d615>] >> int_ret_from_sys_call+0x25/0x9f > > This one's a bit baffling: open of the bsg device should have already > taken the module reference. What was the actual error: NULL deref? > > The thing which is supposed to hold the module is the device open/close > which does scsi_device_put on sd_release ... unless this is some sort > of non-scsi device and qlogic forgot how to refcount? > >> On refcount for scsi_host_template: valid point, I did consider it. >> Existing drivers allocate scsi_host_template statically. We cannot >> change them all at once. So we have to allow 2 ways of allocating >> scsi_host_template: the dynamic one with refcounts and the static one >> for legacy driver support. That is kind of ugly, too. In addition, >> having a refcounted scsi_host_template after driver unload is >> confusing: the memory of scsi_host_template is OK, but any attempt to >> call a method from the template still causes a crash. > > No, the static template already is part of the module so it should be > refcounted as a module reference. > > James >
crash 7.0.3 Copyright (C) 2002-2013 Red Hat, Inc. Copyright (C) 2004, 2005, 2006, 2010 IBM Corporation Copyright (C) 1999-2006 Hewlett-Packard Co Copyright (C) 2005, 2006, 2011, 2012 Fujitsu Limited Copyright (C) 2006, 2007 VA Linux Systems Japan K.K. Copyright (C) 2005, 2011 NEC Corporation Copyright (C) 1999, 2002, 2007 Silicon Graphics, Inc. Copyright (C) 1999, 2000, 2001, 2002 Mission Critical Linux, Inc. This program is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Enter "help copying" to see the conditions. This program has absolutely no warranty. Enter "help warranty" for details. GNU gdb (GDB) 7.6 Copyright (C) 2013 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-unknown-linux-gnu"... please wait... (gathering kmem slab cache data) please wait... (gathering module symbol data) please wait... (gathering task table data) please wait... (determining panic task) KERNEL: vmlinux DUMPFILE: dump.201803181309 [PARTIAL DUMP] CPUS: 48 DATE: Wed Dec 31 17:00:00 1969 UPTIME: 1 days, 17:04:03 LOAD AVERAGE: 34.75, 25.58, 23.08 TASKS: 4870 NODENAME: gm65-15-ct1 RELEASE: 4.4.77+ VERSION: #201802280032+4a6340d.qlogictarget SMP Tue, 27 Feb 2018 16:32:16 MACHINE: x86_64 (2199 Mhz) MEMORY: 383.9 GB PANIC: "Oops: 0000 [#1] SMP " (check log for details) PID: 247779 COMMAND: "qaucli" TASK: ffff880350279c00 [THREAD_INFO: ffff8804197ac000] CPU: 11 STATE: TASK_RUNNING (PANIC) crash> bt -a PID: 251975 TASK: ffff882fbe671c00 CPU: 0 COMMAND: "puredb" #0 [ffff8803da79bd38] path_openat at ffffffff811a67e2 #1 [ffff8803da79bde8] do_filp_open at ffffffff811a8c5e #2 [ffff8803da79bee8] do_sys_open at ffffffff8119940b #3 [ffff8803da79bf40] sys_open at ffffffff8119959e #4 [ffff8803da79bf50] entry_SYSCALL_64_fastpath at ffffffff8172d4b2 RIP: 00007fa8a1e74170 RSP: 00007ffe8a1f0308 RFLAGS: 00000246 RAX: ffffffffffffffda RBX: 0000000001cf6f90 RCX: 00007fa8a1e74170 RDX: 00000000000001b6 RSI: 0000000000000000 RDI: 0000000001dae580 RBP: 0000000000000000 R8: 00000000005ba97e R9: 0000000000000000 R10: 0000000091908c95 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000001cf6f90 R14: 0000000001db1e90 R15: 000000005aaac651 ORIG_RAX: 0000000000000002 CS: 0033 SS: 002b PID: 239991 TASK: ffff88331be60000 CPU: 1 COMMAND: "java" #0 [ffff88330967be80] crash_nmi_callback at ffffffff81033eb1 #1 [ffff88330967bea0] nmi_handle at ffffffff81008d51 #2 [ffff88330967bef8] default_do_nmi at ffffffff810092a0 #3 [ffff88330967bf18] do_nmi at ffffffff8100945a #4 [ffff88330967bf50] nmi at ffffffff8172f476 RIP: 00007fedcd01acae RSP: 00007feda5ed9fb0 RFLAGS: 00000202 RAX: 00007fedcd72b010 RBX: 00007fec942b4d40 RCX: 00000000000004bb RDX: 0000000000000002 RSI: 00000000000004bb RDI: 00007feda5eda440 RBP: 00007feda5eda010 R8: 00007fec94505550 R9: 00007fec942b5578 R10: 0000000000000002 R11: 0000000000000000 R12: 00007feda5eda0c0 R13: 00007feda5eda0a0 R14: 00007feda5eda440 R15: 00007feda5eda080 ORIG_RAX: ffffffffffffffff CS: 0033 SS: 002b PID: 251751 TASK: ffff880336278000 CPU: 2 COMMAND: "monitord" #0 [ffff880336a7fe80] crash_nmi_callback at ffffffff81033eb1 #1 [ffff880336a7fea0] nmi_handle at ffffffff81008d51 #2 [ffff880336a7fef8] default_do_nmi at ffffffff810092a0 #3 [ffff880336a7ff18] do_nmi at ffffffff8100945a #4 [ffff880336a7ff50] nmi at ffffffff8172f476 RIP: 00000000005344b0 RSP: 00007fffa28f0b30 RFLAGS: 00000202 RAX: 00000000008f1320 RBX: 00007f6719511b18 RCX: 000000000000001f RDX: 00000000010d3960 RSI: 00000000008d6db0 RDI: 00007f6719511b18 RBP: 00007f6719511b18 R8: 00000000010d3a98 R9: 000000000000000c R10: 00000000010d3a50 R11: 00000000010d3a68 R12: 00000000008d6db0 R13: 0000000000534490 R14: 00007f6719502c58 R15: 00007f6719502c38 ORIG_RAX: ffffffffffffffff CS: 0033 SS: 002b PID: 0 TASK: ffff88017ed4d400 CPU: 3 COMMAND: "swapper/3" #0 [ffff88017ed5be80] cpuidle_enter_state at ffffffff81603c8d #1 [ffff88017ed5bec8] cpuidle_enter at ffffffff81603e97 #2 [ffff88017ed5bed8] call_cpuidle at ffffffff81095cb2 #3 [ffff88017ed5bef0] cpu_startup_entry at ffffffff81095f47 #4 [ffff88017ed5bf38] start_secondary at ffffffff81035219 PID: 0 TASK: ffff88017ed60000 CPU: 4 COMMAND: "swapper/4" #0 [ffff88017ed5fe80] cpuidle_enter_state at ffffffff81603c8d #1 [ffff88017ed5fec8] cpuidle_enter at ffffffff81603e97 #2 [ffff88017ed5fed8] call_cpuidle at ffffffff81095cb2 #3 [ffff88017ed5fef0] cpu_startup_entry at ffffffff81095f47 #4 [ffff88017ed5ff38] start_secondary at ffffffff81035219 PID: 251742 TASK: ffff88042bf60000 CPU: 5 COMMAND: "platform_framew" #0 [ffff880330e6be80] crash_nmi_callback at ffffffff81033eb1 #1 [ffff880330e6bea0] nmi_handle at ffffffff81008d51 #2 [ffff880330e6bef8] default_do_nmi at ffffffff810092a0 #3 [ffff880330e6bf18] do_nmi at ffffffff8100945a #4 [ffff880330e6bf50] nmi at ffffffff8172f476 RIP: 00007f503241e174 RSP: 00007ffe20ce8e60 RFLAGS: 00000216 RAX: ffffffffffffff00 RBX: 00007f5032454000 RCX: 00007f50325d19d8 RDX: 00007f501d7ee918 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007ffe20ce8f90 R8: 00007f5032632500 R9: 00007f5032632500 R10: 00007ffe20ce8cb0 R11: 00007f50248770c0 R12: 00007f502418b8c0 R13: 0000000000000001 R14: 00007f5023a612b0 R15: 00007f5023a32000 ORIG_RAX: ffffffffffffffff CS: 0033 SS: 002b PID: 251681 TASK: ffff88330fd51c00 CPU: 6 COMMAND: "java" #0 [ffff88044b26fd60] __ext4_handle_dirty_super at ffffffff8124f06b #1 [ffff88044b26fd98] ext4_orphan_del at ffffffff8122ab12 #2 [ffff88044b26fe10] ext4_evict_inode at ffffffff8122047f #3 [ffff88044b26fe30] evict at ffffffff811b2cb7 #4 [ffff88044b26fe58] iput at ffffffff811b3546 #5 [ffff88044b26fe90] d_delete at ffffffff811af435 #6 [ffff88044b26feb8] vfs_rmdir at ffffffff811a526a #7 [ffff88044b26fed8] do_rmdir at ffffffff811a8784 #8 [ffff88044b26ff40] sys_rmdir at ffffffff811a9326 #9 [ffff88044b26ff50] entry_SYSCALL_64_fastpath at ffffffff8172d4b2 RIP: 00007fedcdecec47 RSP: 00007fed8c9b9a58 RFLAGS: 00000246 RAX: ffffffffffffffda RBX: 00007fea00049460 RCX: 00007fedcdecec47 RDX: ffffffffffffff60 RSI: 00007febc4002ad8 RDI: 00007fea000216b0 RBP: 00007fed8c9b9980 R8: 00007fea000216b0 R9: 0000000000000028 R10: 0000000000000048 R11: 0000000000000246 R12: 00007fe9f80021e0 R13: 000000000000003c R14: 00007fea0006d8a0 R15: 00007fed8c9b9940 ORIG_RAX: 0000000000000054 CS: 0033 SS: 002b PID: 0 TASK: ffff88017ed65400 CPU: 7 COMMAND: "swapper/7" #0 [ffff88017ed7be80] cpuidle_enter_state at ffffffff81603c8d #1 [ffff88017ed7bec8] cpuidle_enter at ffffffff81603e97 #2 [ffff88017ed7bed8] call_cpuidle at ffffffff81095cb2 #3 [ffff88017ed7bef0] cpu_startup_entry at ffffffff81095f47 #4 [ffff88017ed7bf38] start_secondary at ffffffff81035219 PID: 0 TASK: ffff88017ed80000 CPU: 8 COMMAND: "swapper/8" #0 [ffff88017ed7fe80] cpuidle_enter_state at ffffffff81603c8d #1 [ffff88017ed7fec8] cpuidle_enter at ffffffff81603e97 #2 [ffff88017ed7fed8] call_cpuidle at ffffffff81095cb2 #3 [ffff88017ed7fef0] cpu_startup_entry at ffffffff81095f47 #4 [ffff88017ed7ff38] start_secondary at ffffffff81035219 PID: 0 TASK: ffff88017ed81c00 CPU: 9 COMMAND: "swapper/9" #0 [ffff88017ed8be80] cpuidle_enter_state at ffffffff81603c8d #1 [ffff88017ed8bec8] cpuidle_enter at ffffffff81603e97 #2 [ffff88017ed8bed8] call_cpuidle at ffffffff81095cb2 #3 [ffff88017ed8bef0] cpu_startup_entry at ffffffff81095f47 #4 [ffff88017ed8bf38] start_secondary at ffffffff81035219 PID: 0 TASK: ffff88017ed83800 CPU: 10 COMMAND: "swapper/10" #0 [ffff88017ed8fe80] cpuidle_enter_state at ffffffff81603c8d #1 [ffff88017ed8fec8] cpuidle_enter at ffffffff81603e97 #2 [ffff88017ed8fed8] call_cpuidle at ffffffff81095cb2 #3 [ffff88017ed8fef0] cpu_startup_entry at ffffffff81095f47 #4 [ffff88017ed8ff38] start_secondary at ffffffff81035219 PID: 247779 TASK: ffff880350279c00 CPU: 11 COMMAND: "qaucli" #0 [ffff8804197afa18] machine_kexec at ffffffff8103ed41 #1 [ffff8804197afa70] crash_kexec at ffffffff810d82b3 #2 [ffff8804197afb38] oops_end at ffffffff810085e2 #3 [ffff8804197afb60] no_context at ffffffff81049ec0 #4 [ffff8804197afbb8] __bad_area_nosemaphore at ffffffff8104a194 #5 [ffff8804197afc00] bad_area_nosemaphore at ffffffff8104a2a3 #6 [ffff8804197afc10] __do_page_fault at ffffffff8104aac3 #7 [ffff8804197afc70] do_page_fault at ffffffff8104ad72 #8 [ffff8804197afc90] page_fault at ffffffff8172f1a5 [exception RIP: scsi_proc_hostdir_rm+10] RIP: ffffffff8142687a RSP: ffff8804197afd48 RFLAGS: 00010246 RAX: ffff88037868c208 RBX: ffff88037868c000 RCX: 0000000000000286 RDX: ffff88037868c490 RSI: 0000000000000286 RDI: ffffffffa0908140 RBP: ffff8804197afd50 R8: ffff88034738f200 R9: 00000001802a0001 R10: ffff882fbfb789a0 R11: ffffea000d1ce380 R12: ffff88522e58d098 R13: ffff882f81bc1980 R14: ffff88034738f208 R15: ffff880356b5f380 ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018 #9 [ffff8804197afd58] scsi_host_dev_release at ffffffff8141723f #10 [ffff8804197afd80] device_release at ffffffff813e4f82 #11 [ffff8804197afda8] kobject_cleanup at ffffffff812dc6c7 #12 [ffff8804197afdd0] kobject_put at ffffffff812dc585 #13 [ffff8804197afde8] put_device at ffffffff813e5277 #14 [ffff8804197afdf8] bsg_kref_release_function at ffffffff812d0334 #15 [ffff8804197afe10] bsg_release at ffffffff812d14a6 #16 [ffff8804197afe70] __fput at ffffffff8119ba2b #17 [ffff8804197afeb0] ____fput at ffffffff8119bb6e #18 [ffff8804197afec0] task_work_run at ffffffff81077476 #19 [ffff8804197aff00] exit_to_usermode_loop at ffffffff81057043 #20 [ffff8804197aff30] syscall_return_slowpath at ffffffff81002875 #21 [ffff8804197aff50] int_ret_from_sys_call at ffffffff8172d615 RIP: 00007f98a79b83f0 RSP: 00007ffead255f18 RFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000793a90 RCX: 00007f98a79b83f0 RDX: 0000000000000001 RSI: 00007ffead255ef0 RDI: 0000000000000003 RBP: 00007ffead256210 R8: 00007ffead255e50 R9: 00007ffead255c90 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000004 R15: 000000000048a85e ORIG_RAX: 0000000000000003 CS: 0033 SS: 002b PID: 165659 TASK: ffff885fada5d400 CPU: 12 COMMAND: "test.py" #0 [ffff885f623efe80] crash_nmi_callback at ffffffff81033eb1 #1 [ffff885f623efea0] nmi_handle at ffffffff81008d51 #2 [ffff885f623efef8] default_do_nmi at ffffffff810092a0 #3 [ffff885f623eff18] do_nmi at ffffffff8100945a #4 [ffff885f623eff50] nmi at ffffffff8172f476 RIP: 00000000004c7c5f RSP: 00007ffdb2bcd500 RFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000e87d80 RCX: 0000000000000000 RDX: 0000000000000079 RSI: 0000000000000001 RDI: 00007f5ac458a050 RBP: 00007f5ac458a1c8 R8: 0000000000e2b0a0 R9: 0000000000000000 R10: 0000000000000071 R11: 0000000000000000 R12: 00007f5ac45e0b7c R13: 00007f5ac45e0bf5 R14: 0000000000000079 R15: 0000000000000079 ORIG_RAX: ffffffffffffffff CS: 0033 SS: 002b PID: 0 TASK: ffff88522f673800 CPU: 13 COMMAND: "swapper/13" #0 [ffff88522f6d7e80] cpuidle_enter_state at ffffffff81603c8d #1 [ffff88522f6d7ec8] cpuidle_enter at ffffffff81603e97 #2 [ffff88522f6d7ed8] call_cpuidle at ffffffff81095cb2 #3 [ffff88522f6d7ef0] cpu_startup_entry at ffffffff81095f47 #4 [ffff88522f6d7f38] start_secondary at ffffffff81035219 PID: 0 TASK: ffff88522f6d8000 CPU: 14 COMMAND: "swapper/14" #0 [ffff88522f6e3e80] cpuidle_enter_state at ffffffff81603c8d #1 [ffff88522f6e3ec8] cpuidle_enter at ffffffff81603e97 #2 [ffff88522f6e3ed8] call_cpuidle at ffffffff81095cb2 #3 [ffff88522f6e3ef0] cpu_startup_entry at ffffffff81095f47 #4 [ffff88522f6e3f38] start_secondary at ffffffff81035219 PID: 0 TASK: ffff88522f6d9c00 CPU: 15 COMMAND: "swapper/15" #0 [ffff88522f6e7e80] cpuidle_enter_state at ffffffff81603c8d #1 [ffff88522f6e7ec8] cpuidle_enter at ffffffff81603e97 #2 [ffff88522f6e7ed8] call_cpuidle at ffffffff81095cb2 #3 [ffff88522f6e7ef0] cpu_startup_entry at ffffffff81095f47 #4 [ffff88522f6e7f38] start_secondary at ffffffff81035219 PID: 251894 TASK: ffff8833152e0000 CPU: 16 COMMAND: "java" #0 [ffff88522ecf3e80] crash_nmi_callback at ffffffff81033eb1 #1 [ffff88522ecf3ea0] nmi_handle at ffffffff81008d51 #2 [ffff88522ecf3ef8] default_do_nmi at ffffffff810092a0 #3 [ffff88522ecf3f18] do_nmi at ffffffff8100945a #4 [ffff88522ecf3f50] nmi at ffffffff8172f476 RIP: 00007f79bf884470 RSP: 00007f79c21cc250 RFLAGS: 00000202 RAX: 00000000000001f4 RBX: 00007f79b9336c48 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 00007f79b9331368 RDI: 00007f79b800f000 RBP: 00007f79c21cc9d0 R8: 00007f79c21cc650 R9: 00007f79b92fdb20 R10: 0000000000000000 R11: 00007f79c21cc5c0 R12: 0000000000000000 R13: 00007f79b9336c18 R14: 00007f79c21cc650 R15: 00007f79b9323d90 ORIG_RAX: ffffffffffffffff CS: 0033 SS: 002b PID: 0 TASK: ffff88522f6dd400 CPU: 17 COMMAND: "swapper/17" #0 [ffff88522f6efe80] cpuidle_enter_state at ffffffff81603c8d #1 [ffff88522f6efec8] cpuidle_enter at ffffffff81603e97 #2 [ffff88522f6efed8] call_cpuidle at ffffffff81095cb2 #3 [ffff88522f6efef0] cpu_startup_entry at ffffffff81095f47 #4 [ffff88522f6eff38] start_secondary at ffffffff81035219 PID: 0 TASK: ffff88522f6f0000 CPU: 18 COMMAND: "swapper/18" #0 [ffff88522f6fbe80] cpuidle_enter_state at ffffffff81603c8d #1 [ffff88522f6fbec8] cpuidle_enter at ffffffff81603e97 #2 [ffff88522f6fbed8] call_cpuidle at ffffffff81095cb2 #3 [ffff88522f6fbef0] cpu_startup_entry at ffffffff81095f47 #4 [ffff88522f6fbf38] start_secondary at ffffffff81035219 PID: 0 TASK: ffff88522f6f1c00 CPU: 19 COMMAND: "swapper/19" #0 [ffff88522f6ffe80] cpuidle_enter_state at ffffffff81603c8d #1 [ffff88522f6ffec8] cpuidle_enter at ffffffff81603e97 #2 [ffff88522f6ffed8] call_cpuidle at ffffffff81095cb2 #3 [ffff88522f6ffef0] cpu_startup_entry at ffffffff81095f47 #4 [ffff88522f6fff38] start_secondary at ffffffff81035219 PID: 0 TASK: ffff88522f6f3800 CPU: 20 COMMAND: "swapper/20" #0 [ffff88522ec03e80] cpuidle_enter_state at ffffffff81603c8d #1 [ffff88522ec03ec8] cpuidle_enter at ffffffff81603e97 #2 [ffff88522ec03ed8] call_cpuidle at ffffffff81095cb2 #3 [ffff88522ec03ef0] cpu_startup_entry at ffffffff81095f47 #4 [ffff88522ec03f38] start_secondary at ffffffff81035219 PID: 0 TASK: ffff88522f6f5400 CPU: 21 COMMAND: "swapper/21" #0 [ffff88522ec07e80] cpuidle_enter_state at ffffffff81603c8d #1 [ffff88522ec07ec8] cpuidle_enter at ffffffff81603e97 #2 [ffff88522ec07ed8] call_cpuidle at ffffffff81095cb2 #3 [ffff88522ec07ef0] cpu_startup_entry at ffffffff81095f47 #4 [ffff88522ec07f38] start_secondary at ffffffff81035219 PID: 0 TASK: ffff88522ec08000 CPU: 22 COMMAND: "swapper/22" #0 [ffff88522ec13e80] cpuidle_enter_state at ffffffff81603c8d #1 [ffff88522ec13ec8] cpuidle_enter at ffffffff81603e97 #2 [ffff88522ec13ed8] call_cpuidle at ffffffff81095cb2 #3 [ffff88522ec13ef0] cpu_startup_entry at ffffffff81095f47 #4 [ffff88522ec13f38] start_secondary at ffffffff81035219 PID: 0 TASK: ffff88522ec09c00 CPU: 23 COMMAND: "swapper/23" #0 [ffff88522ec17e80] cpuidle_enter_state at ffffffff81603c8d #1 [ffff88522ec17ec8] cpuidle_enter at ffffffff81603e97 #2 [ffff88522ec17ed8] call_cpuidle at ffffffff81095cb2 #3 [ffff88522ec17ef0] cpu_startup_entry at ffffffff81095f47 #4 [ffff88522ec17f38] start_secondary at ffffffff81035219 PID: 0 TASK: ffff88017eda8000 CPU: 24 COMMAND: "swapper/24" #0 [ffff88017ed97e80] cpuidle_enter_state at ffffffff81603c8d #1 [ffff88017ed97ec8] cpuidle_enter at ffffffff81603e97 #2 [ffff88017ed97ed8] call_cpuidle at ffffffff81095cb2 #3 [ffff88017ed97ef0] cpu_startup_entry at ffffffff81095f47 #4 [ffff88017ed97f38] start_secondary at ffffffff81035219 PID: 0 TASK: ffff88017eda9c00 CPU: 25 COMMAND: "swapper/25" #0 [ffff88017edb3e80] cpuidle_enter_state at ffffffff81603c8d #1 [ffff88017edb3ec8] cpuidle_enter at ffffffff81603e97 #2 [ffff88017edb3ed8] call_cpuidle at ffffffff81095cb2 #3 [ffff88017edb3ef0] cpu_startup_entry at ffffffff81095f47 #4 [ffff88017edb3f38] start_secondary at ffffffff81035219 PID: 0 TASK: ffff88017edab800 CPU: 26 COMMAND: "swapper/26" #0 [ffff88017edb7e80] cpuidle_enter_state at ffffffff81603c8d #1 [ffff88017edb7ec8] cpuidle_enter at ffffffff81603e97 #2 [ffff88017edb7ed8] call_cpuidle at ffffffff81095cb2 #3 [ffff88017edb7ef0] cpu_startup_entry at ffffffff81095f47 #4 [ffff88017edb7f38] start_secondary at ffffffff81035219 PID: 251755 TASK: ffff880388395400 CPU: 27 COMMAND: "python" #0 [ffff8803ea79fe80] crash_nmi_callback at ffffffff81033eb1 #1 [ffff8803ea79fea0] nmi_handle at ffffffff81008d51 #2 [ffff8803ea79fef8] default_do_nmi at ffffffff810092a0 #3 [ffff8803ea79ff18] do_nmi at ffffffff8100945a #4 [ffff8803ea79ff50] nmi at ffffffff8172f476 RIP: 0000000000534500 RSP: 00007ffeb55b0b60 RFLAGS: 00000246 RAX: 0000000000000000 RBX: 00007ff9371ca398 RCX: 000000000000007f RDX: 0000000000000000 RSI: 00000000008d6db0 RDI: 00007ff9371ca398 RBP: 00007ff9371ca398 R8: 00000000029c5c40 R9: 0000000000000046 R10: 00000000029c5c10 R11: 00000000029c5c28 R12: 00000000008d6db0 R13: 0000000000534490 R14: 00007ff9372204b0 R15: 00007ff937220490 ORIG_RAX: ffffffffffffffff CS: 0033 SS: 002b PID: 0 TASK: ffff88017edc0000 CPU: 28 COMMAND: "swapper/28" #0 [ffff88017edbfe80] cpuidle_enter_state at ffffffff81603c8d #1 [ffff88017edbfec8] cpuidle_enter at ffffffff81603e97 #2 [ffff88017edbfed8] call_cpuidle at ffffffff81095cb2 #3 [ffff88017edbfef0] cpu_startup_entry at ffffffff81095f47 #4 [ffff88017edbff38] start_secondary at ffffffff81035219 PID: 0 TASK: ffff88017edc1c00 CPU: 29 COMMAND: "swapper/29" #0 [ffff88017edcbe80] cpuidle_enter_state at ffffffff81603c8d #1 [ffff88017edcbec8] cpuidle_enter at ffffffff81603e97 #2 [ffff88017edcbed8] call_cpuidle at ffffffff81095cb2 #3 [ffff88017edcbef0] cpu_startup_entry at ffffffff81095f47 #4 [ffff88017edcbf38] start_secondary at ffffffff81035219 PID: 0 TASK: ffff88017edc3800 CPU: 30 COMMAND: "swapper/30" #0 [ffff88017edcfe80] cpuidle_enter_state at ffffffff81603c8d #1 [ffff88017edcfec8] cpuidle_enter at ffffffff81603e97 #2 [ffff88017edcfed8] call_cpuidle at ffffffff81095cb2 #3 [ffff88017edcfef0] cpu_startup_entry at ffffffff81095f47 #4 [ffff88017edcff38] start_secondary at ffffffff81035219 PID: 0 TASK: ffff88017edc5400 CPU: 31 COMMAND: "swapper/31" #0 [ffff88017edd3e80] cpuidle_enter_state at ffffffff81603c8d #1 [ffff88017edd3ec8] cpuidle_enter at ffffffff81603e97 #2 [ffff88017edd3ed8] call_cpuidle at ffffffff81095cb2 #3 [ffff88017edd3ef0] cpu_startup_entry at ffffffff81095f47 #4 [ffff88017edd3f38] start_secondary at ffffffff81035219 PID: 239988 TASK: ffff885f51619c00 CPU: 32 COMMAND: "java" #0 [ffff885fb716fe80] crash_nmi_callback at ffffffff81033eb1 #1 [ffff885fb716fea0] nmi_handle at ffffffff81008d51 #2 [ffff885fb716fef8] default_do_nmi at ffffffff810092a0 #3 [ffff885fb716ff18] do_nmi at ffffffff8100945a #4 [ffff885fb716ff50] nmi at ffffffff8172f476 RIP: 00007fedcce92c61 RSP: 00007feda61dd130 RFLAGS: 00000202 RAX: 00007fec7c1f1f88 RBX: 0000000000000001 RCX: 00007fec981bba08 RDX: 00007fec8c15d4a0 RSI: 00007feda61dde60 RDI: 00007feda61dde60 RBP: 00007feda61dd2a0 R8: 00007fec8c1378f0 R9: 000000000000004a R10: 0000000000000002 R11: 0000000000040000 R12: 00007fec7c1f1f50 R13: 00007feda61dde60 R14: 00007feda61dde60 R15: 00007fec7c1f1f50 ORIG_RAX: ffffffffffffffff CS: 0033 SS: 002b PID: 0 TASK: ffff88017edd9c00 CPU: 33 COMMAND: "swapper/33" #0 [ffff88017ede3e80] cpuidle_enter_state at ffffffff81603c8d #1 [ffff88017ede3ec8] cpuidle_enter at ffffffff81603e97 #2 [ffff88017ede3ed8] call_cpuidle at ffffffff81095cb2 #3 [ffff88017ede3ef0] cpu_startup_entry at ffffffff81095f47 #4 [ffff88017ede3f38] start_secondary at ffffffff81035219 PID: 251780 TASK: ffff88043ff25400 CPU: 34 COMMAND: "purehost" #0 [ffff880306bafe80] crash_nmi_callback at ffffffff81033eb1 #1 [ffff880306bafea0] nmi_handle at ffffffff81008d51 #2 [ffff880306bafef8] default_do_nmi at ffffffff810092a0 #3 [ffff880306baff18] do_nmi at ffffffff8100945a #4 [ffff880306baff50] nmi at ffffffff8172f476 RIP: 00000000004ca910 RSP: 00007ffea04d2360 RFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000c16170 RCX: 0000000000535120 RDX: 000000000000007e RSI: 0000000000c16338 RDI: 0000000000c16170 RBP: 0000000000fc0448 R8: 00000000000000c7 R9: 00000000008fe3e0 R10: 0000000000000072 R11: 00000000008fe3e0 R12: 0000000000c16170 R13: 0000000000c73b95 R14: 00000000008f0520 R15: 0000000000c73b95 ORIG_RAX: ffffffffffffffff CS: 0033 SS: 002b PID: 0 TASK: ffff88017eddd400 CPU: 35 COMMAND: "swapper/35" #0 [ffff88017edebe80] cpuidle_enter_state at ffffffff81603c8d #1 [ffff88017edebec8] cpuidle_enter at ffffffff81603e97 #2 [ffff88017edebed8] call_cpuidle at ffffffff81095cb2 #3 [ffff88017edebef0] cpu_startup_entry at ffffffff81095f47 #4 [ffff88017edebf38] start_secondary at ffffffff81035219 PID: 0 TASK: ffff88522ec0d400 CPU: 36 COMMAND: "swapper/36" #0 [ffff88522ec1be80] cpuidle_enter_state at ffffffff81603c8d #1 [ffff88522ec1bec8] cpuidle_enter at ffffffff81603e97 #2 [ffff88522ec1bed8] call_cpuidle at ffffffff81095cb2 #3 [ffff88522ec1bef0] cpu_startup_entry at ffffffff81095f47 #4 [ffff88522ec1bf38] start_secondary at ffffffff81035219 PID: 0 TASK: ffff88522ec0b800 CPU: 37 COMMAND: "swapper/37" #0 [ffff88522ec1fe80] cpuidle_enter_state at ffffffff81603c8d #1 [ffff88522ec1fec8] cpuidle_enter at ffffffff81603e97 #2 [ffff88522ec1fed8] call_cpuidle at ffffffff81095cb2 #3 [ffff88522ec1fef0] cpu_startup_entry at ffffffff81095f47 #4 [ffff88522ec1ff38] start_secondary at ffffffff81035219 PID: 0 TASK: ffff88522ec20000 CPU: 38 COMMAND: "swapper/38" #0 [ffff88522ec2be80] cpuidle_enter_state at ffffffff81603c8d #1 [ffff88522ec2bec8] cpuidle_enter at ffffffff81603e97 #2 [ffff88522ec2bed8] call_cpuidle at ffffffff81095cb2 #3 [ffff88522ec2bef0] cpu_startup_entry at ffffffff81095f47 #4 [ffff88522ec2bf38] start_secondary at ffffffff81035219 PID: 0 TASK: ffff88522ec21c00 CPU: 39 COMMAND: "swapper/39" #0 [ffff88522ec2fe80] cpuidle_enter_state at ffffffff81603c8d #1 [ffff88522ec2fec8] cpuidle_enter at ffffffff81603e97 #2 [ffff88522ec2fed8] call_cpuidle at ffffffff81095cb2 #3 [ffff88522ec2fef0] cpu_startup_entry at ffffffff81095f47 #4 [ffff88522ec2ff38] start_secondary at ffffffff81035219 PID: 0 TASK: ffff88522ec23800 CPU: 40 COMMAND: "swapper/40" #0 [ffff88522ec33e80] cpuidle_enter_state at ffffffff81603c8d #1 [ffff88522ec33ec8] cpuidle_enter at ffffffff81603e97 #2 [ffff88522ec33ed8] call_cpuidle at ffffffff81095cb2 #3 [ffff88522ec33ef0] cpu_startup_entry at ffffffff81095f47 #4 [ffff88522ec33f38] start_secondary at ffffffff81035219 PID: 0 TASK: ffff88522ec25400 CPU: 41 COMMAND: "swapper/41" #0 [ffff88522ec37e80] cpuidle_enter_state at ffffffff81603c8d #1 [ffff88522ec37ec8] cpuidle_enter at ffffffff81603e97 #2 [ffff88522ec37ed8] call_cpuidle at ffffffff81095cb2 #3 [ffff88522ec37ef0] cpu_startup_entry at ffffffff81095f47 #4 [ffff88522ec37f38] start_secondary at ffffffff81035219 PID: 0 TASK: ffff88522ec38000 CPU: 42 COMMAND: "swapper/42" #0 [ffff88522ec43e80] cpuidle_enter_state at ffffffff81603c8d #1 [ffff88522ec43ec8] cpuidle_enter at ffffffff81603e97 #2 [ffff88522ec43ed8] call_cpuidle at ffffffff81095cb2 #3 [ffff88522ec43ef0] cpu_startup_entry at ffffffff81095f47 #4 [ffff88522ec43f38] start_secondary at ffffffff81035219 PID: 0 TASK: ffff88522ec39c00 CPU: 43 COMMAND: "swapper/43" #0 [ffff88522ec47e80] cpuidle_enter_state at ffffffff81603c8d #1 [ffff88522ec47ec8] cpuidle_enter at ffffffff81603e97 #2 [ffff88522ec47ed8] call_cpuidle at ffffffff81095cb2 #3 [ffff88522ec47ef0] cpu_startup_entry at ffffffff81095f47 #4 [ffff88522ec47f38] start_secondary at ffffffff81035219 PID: 0 TASK: ffff88522ec3b800 CPU: 44 COMMAND: "swapper/44" #0 [ffff88522ec4be80] cpuidle_enter_state at ffffffff81603c8d #1 [ffff88522ec4bec8] cpuidle_enter at ffffffff81603e97 #2 [ffff88522ec4bed8] call_cpuidle at ffffffff81095cb2 #3 [ffff88522ec4bef0] cpu_startup_entry at ffffffff81095f47 #4 [ffff88522ec4bf38] start_secondary at ffffffff81035219 PID: 0 TASK: ffff88522ec3d400 CPU: 45 COMMAND: "swapper/45" #0 [ffff88522ec4fe80] cpuidle_enter_state at ffffffff81603c8d #1 [ffff88522ec4fec8] cpuidle_enter at ffffffff81603e97 #2 [ffff88522ec4fed8] call_cpuidle at ffffffff81095cb2 #3 [ffff88522ec4fef0] cpu_startup_entry at ffffffff81095f47 #4 [ffff88522ec4ff38] start_secondary at ffffffff81035219 PID: 0 TASK: ffff88522ec50000 CPU: 46 COMMAND: "swapper/46" #0 [ffff88522ec5be80] cpuidle_enter_state at ffffffff81603c8d #1 [ffff88522ec5bec8] cpuidle_enter at ffffffff81603e97 #2 [ffff88522ec5bed8] call_cpuidle at ffffffff81095cb2 #3 [ffff88522ec5bef0] cpu_startup_entry at ffffffff81095f47 #4 [ffff88522ec5bf38] start_secondary at ffffffff81035219 PID: 0 TASK: ffff88522ec51c00 CPU: 47 COMMAND: "swapper/47" #0 [ffff88522ec5fe80] cpuidle_enter_state at ffffffff81603c8d #1 [ffff88522ec5fec8] cpuidle_enter at ffffffff81603e97 #2 [ffff88522ec5fed8] call_cpuidle at ffffffff81095cb2 #3 [ffff88522ec5fef0] cpu_startup_entry at ffffffff81095f47 #4 [ffff88522ec5ff38] start_secondary at ffffffff81035219 crash> bt -f PID: 247779 TASK: ffff880350279c00 CPU: 11 COMMAND: "qaucli" #0 [ffff8804197afa18] machine_kexec at ffffffff8103ed41 ffff8804197afa20: 0000fbff1a200800 ffff880000000000 ffff8804197afa30: 0000000016003000 ffff880016003000 ffff8804197afa40: 0000000016002000 000000000000000b ffff8804197afa50: ffff8804197afc98 ffff8804197afa78 ffff8804197afa60: 0000000000000046 ffff8804197afb30 ffff8804197afa70: ffffffff810d82b3 #1 [ffff8804197afa70] crash_kexec at ffffffff810d82b3 ffff8804197afa78: ffff880356b5f380 ffff88034738f208 ffff8804197afa88: ffff882f81bc1980 ffff88522e58d098 ffff8804197afa98: ffff8804197afd50 ffff88037868c000 ffff8804197afaa8: ffffea000d1ce380 ffff882fbfb789a0 ffff8804197afab8: 00000001802a0001 ffff88034738f200 ffff8804197afac8: ffff88037868c208 0000000000000286 ffff8804197afad8: ffff88037868c490 0000000000000286 ffff8804197afae8: ffffffffa0908140 ffffffffffffffff ffff8804197afaf8: ffffffff8142687a 0000000000000010 ffff8804197afb08: 0000000000010246 ffff8804197afd48 ffff8804197afb18: 0000000000000018 0000000000000009 ffff8804197afb28: ffff8804197afc98 ffff8804197afb58 ffff8804197afb38: ffffffff810085e2 #2 [ffff8804197afb38] oops_end at ffffffff810085e2 ffff8804197afb40: ffff8804197afc98 0000000000000009 ffff8804197afb50: 0000000000000000 ffff8804197afbb0 ffff8804197afb60: ffffffff81049ec0 #3 [ffff8804197afb60] no_context at ffffffff81049ec0 ffff8804197afb68: 0000000200000018 0000000000000001 ffff8804197afb78: 0000000000000046 ffff88017ebd1a40 ffff8804197afb88: 0000000000000000 ffff8804197afc98 ffff8804197afb98: ffffffffa09081f8 ffff880350279c00 ffff8804197afba8: 0000000000030001 ffff8804197afbf8 ffff8804197afbb8: ffffffff8104a194 #4 [ffff8804197afbb8] __bad_area_nosemaphore at ffffffff8104a194 ffff8804197afbc0: 000000000000372d 0000000000000759 ffff8804197afbd0: ffff882fbd474600 ffffffffa09081f8 ffff8804197afbe0: ffff8804197afc98 ffff88034738f208 ffff8804197afbf0: ffff880350279c00 ffff8804197afc08 ffff8804197afc00: ffffffff8104a2a3 #5 [ffff8804197afc00] bad_area_nosemaphore at ffffffff8104a2a3 ffff8804197afc08: ffff8804197afc68 ffffffff8104aac3 #6 [ffff8804197afc10] __do_page_fault at ffffffff8104aac3 ffff8804197afc18: 0000001400000004 0000000000000018 ffff8804197afc28: ffff8804197afc38 ffff882fbd474668 ffff8804197afc38: 0000000000000000 0000000000000000 ffff8804197afc48: ffff8804197afc98 ffff882f81bc1980 ffff8804197afc58: ffff88034738f208 ffff880356b5f380 ffff8804197afc68: ffff8804197afc88 ffffffff8104ad72 #7 [ffff8804197afc70] do_page_fault at ffffffff8104ad72 ffff8804197afc78: 0000000000000001 ffff88522e58d098 ffff8804197afc88: ffff8804197afd50 ffffffff8172f1a5 #8 [ffff8804197afc90] page_fault at ffffffff8172f1a5 [exception RIP: scsi_proc_hostdir_rm+10] RIP: ffffffff8142687a RSP: ffff8804197afd48 RFLAGS: 00010246 RAX: ffff88037868c208 RBX: ffff88037868c000 RCX: 0000000000000286 RDX: ffff88037868c490 RSI: 0000000000000286 RDI: ffffffffa0908140 RBP: ffff8804197afd50 R8: ffff88034738f200 R9: 00000001802a0001 R10: ffff882fbfb789a0 R11: ffffea000d1ce380 R12: ffff88522e58d098 R13: ffff882f81bc1980 R14: ffff88034738f208 R15: ffff880356b5f380 ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018 ffff8804197afc98: ffff880356b5f380 ffff88034738f208 ffff8804197afca8: ffff882f81bc1980 ffff88522e58d098 ffff8804197afcb8: ffff8804197afd50 ffff88037868c000 ffff8804197afcc8: ffffea000d1ce380 ffff882fbfb789a0 ffff8804197afcd8: 00000001802a0001 ffff88034738f200 ffff8804197afce8: ffff88037868c208 0000000000000286 ffff8804197afcf8: ffff88037868c490 0000000000000286 ffff8804197afd08: ffffffffa0908140 ffffffffffffffff ffff8804197afd18: ffffffff8142687a 0000000000000010 ffff8804197afd28: 0000000000010246 ffff8804197afd48 ffff8804197afd38: 0000000000000018 ffff88037868c208 ffff8804197afd48: ffff88037868c000 ffff8804197afd78 ffff8804197afd58: ffffffff8141723f #9 [ffff8804197afd58] scsi_host_dev_release at ffffffff8141723f ffff8804197afd60: ffff88037868c218 ffff88037868c208 ffff8804197afd70: ffff882f81bc1980 ffff8804197afda0 ffff8804197afd80: ffffffff813e4f82 #10 [ffff8804197afd80] device_release at ffffffff813e4f82 ffff8804197afd88: ffff88037868c218 ffffffff81ea5500 ffff8804197afd98: ffff885fb3ee17c8 ffff8804197afdc8 ffff8804197afda8: ffffffff812dc6c7 #11 [ffff8804197afda8] kobject_cleanup at ffffffff812dc6c7 ffff8804197afdb0: ffff88037868c218 ffff88034738f200 ffff8804197afdc0: 0000000000000000 ffff8804197afde0 ffff8804197afdd0: ffffffff812dc585 #12 [ffff8804197afdd0] kobject_put at ffffffff812dc585 ffff8804197afdd8: ffff88037868c208 ffff8804197afdf0 ffff8804197afde8: ffffffff813e5277 #13 [ffff8804197afde8] put_device at ffffffff813e5277 ffff8804197afdf0: ffff8804197afe08 ffffffff812d0334 #14 [ffff8804197afdf8] bsg_kref_release_function at ffffffff812d0334 ffff8804197afe00: 0000000000000001 ffff8804197afe68 ffff8804197afe10: ffffffff812d14a6 #15 [ffff8804197afe10] bsg_release at ffffffff812d14a6 ffff8804197afe18: 0000100000000008 0000000000000008 ffff8804197afe28: 0000000000795210 0000000000000000 ffff8804197afe38: 0000000000000000 ffff880390779200 ffff8804197afe48: 0000000000000008 ffff8802ed730d30 ffff8804197afe58: ffff88342e904d80 ffff88522e5fc4a0 ffff8804197afe68: ffff8804197afea8 ffffffff8119ba2b #16 [ffff8804197afe70] __fput at ffffffff8119ba2b ffff8804197afe78: ffff880390779210 ffff880390779200 ffff8804197afe88: ffff880350279c00 ffffffff82089eb0 ffff8804197afe98: 0000000000000000 ffff88035027a240 ffff8804197afea8: ffff8804197afeb8 ffffffff8119bb6e #17 [ffff8804197afeb0] ____fput at ffffffff8119bb6e ffff8804197afeb8: ffff8804197afef8 ffffffff81077476 #18 [ffff8804197afec0] task_work_run at ffffffff81077476 ffff8804197afec8: ffff88035027a25c 0000000000000002 ffff8804197afed8: ffff8804197aff58 ffff8804197ac000 ffff8804197afee8: ffff880350279c00 000000000048a85e ffff8804197afef8: ffff8804197aff28 ffffffff81057043 #19 [ffff8804197aff00] exit_to_usermode_loop at ffffffff81057043 ffff8804197aff08: ffff8804197aff58 ffff8804197ac000 ffff8804197aff18: 0000000000000000 0000000000000004 ffff8804197aff28: ffff8804197aff48 ffffffff81002875 #20 [ffff8804197aff30] syscall_return_slowpath at ffffffff81002875 ffff8804197aff38: 0000000000793a90 0000000000000000 ffff8804197aff48: 00007ffead256210 ffffffff8172d615 #21 [ffff8804197aff50] int_ret_from_sys_call at ffffffff8172d615 RIP: 00007f98a79b83f0 RSP: 00007ffead255f18 RFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000793a90 RCX: 00007f98a79b83f0 RDX: 0000000000000001 RSI: 00007ffead255ef0 RDI: 0000000000000003 RBP: 00007ffead256210 R8: 00007ffead255e50 R9: 00007ffead255c90 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000004 R15: 000000000048a85e ORIG_RAX: 0000000000000003 CS: 0033 SS: 002b crash> q crash 7.0.3 Copyright (C) 2002-2013 Red Hat, Inc. Copyright (C) 2004, 2005, 2006, 2010 IBM Corporation Copyright (C) 1999-2006 Hewlett-Packard Co Copyright (C) 2005, 2006, 2011, 2012 Fujitsu Limited Copyright (C) 2006, 2007 VA Linux Systems Japan K.K. Copyright (C) 2005, 2011 NEC Corporation Copyright (C) 1999, 2002, 2007 Silicon Graphics, Inc. Copyright (C) 1999, 2000, 2001, 2002 Mission Critical Linux, Inc. This program is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Enter "help copying" to see the conditions. This program has absolutely no warranty. Enter "help warranty" for details. GNU gdb (GDB) 7.6 Copyright (C) 2013 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-unknown-linux-gnu"... crash> crash> dir ~/puredev/bld_linux/linux-2.6.git Source directories searched: /home/aglagolev/puredev/bld_linux/linux-2.6.git:$cdir:$cwd crash> crash> dir ~/puredev/bld_linux/linux-2.6.git crash> l *( scsi_proc_hostdir_rm+10) 0xffffffff8142687a is in scsi_proc_hostdir_rm (drivers/scsi/scsi_proc.c:121). 116 * scsi_proc_hostdir_rm - remove directory in /proc for a scsi host 117 * @sht: owner of directory 118 */ 119 void scsi_proc_hostdir_rm(struct scsi_host_template *sht) 120 { 121 if (!sht->show_info) 122 return; 123 124 mutex_lock(&global_host_template_mutex); 125 if (!--sht->present && sht->proc_dir) { crash> crash> sym scsi_proc_hostdir_rm ffffffff81426870 (T) scsi_proc_hostdir_rm /home/os76/hudsonworkspace/workspace/p_builder/bld_linux/linux-2.6.git/drivers/scsi/scsi_proc.c: 120 crash> crash> gdb disas ffffffff81426870,+100 No symbol "ffffffff81426870" in current context. gdb: gdb request failed: disas ffffffff81426870,+100 crash> gdb disas ffffffff81426870,+100 Dump of assembler code from 0xffffffff81426870 to 0xffffffff814268d4: 0xffffffff81426870 <scsi_proc_hostdir_rm+0>: nopl 0x0(%rax,%rax,1) 0xffffffff81426875 <scsi_proc_hostdir_rm+5>: push %rbp 0xffffffff81426876 <scsi_proc_hostdir_rm+6>: mov %rsp,%rbp 0xffffffff81426879 <scsi_proc_hostdir_rm+9>: push %rbx 0xffffffff8142687a <scsi_proc_hostdir_rm+10>: cmpq $0x0,0xb8(%rdi) 0xffffffff81426882 <scsi_proc_hostdir_rm+18>: mov %rdi,%rbx 0xffffffff81426885 <scsi_proc_hostdir_rm+21>: je 0xffffffff814268d0 <scsi_proc_hostdir_rm+96> 0xffffffff81426887 <scsi_proc_hostdir_rm+23>: mov $0xffffffff81eae100,%rdi 0xffffffff8142688e <scsi_proc_hostdir_rm+30>: callq 0xffffffff8172b430 <mutex_lock> 0xffffffff81426893 <scsi_proc_hostdir_rm+35>: subb $0x1,0x102(%rbx) 0xffffffff8142689a <scsi_proc_hostdir_rm+42>: jne 0xffffffff814268c4 <scsi_proc_hostdir_rm+84> 0xffffffff8142689c <scsi_proc_hostdir_rm+44>: cmpq $0x0,0xe0(%rbx) 0xffffffff814268a4 <scsi_proc_hostdir_rm+52>: je 0xffffffff814268c4 <scsi_proc_hostdir_rm+84> 0xffffffff814268a6 <scsi_proc_hostdir_rm+54>: mov 0xd8(%rbx),%rdi 0xffffffff814268ad <scsi_proc_hostdir_rm+61>: mov 0x1d003c4(%rip),%rsi # 0xffffffff83126c78 <proc_scsi> 0xffffffff814268b4 <scsi_proc_hostdir_rm+68>: callq 0xffffffff81200630 <remove_proc_entry> 0xffffffff814268b9 <scsi_proc_hostdir_rm+73>: movq $0x0,0xe0(%rbx) 0xffffffff814268c4 <scsi_proc_hostdir_rm+84>: mov $0xffffffff81eae100,%rdi 0xffffffff814268cb <scsi_proc_hostdir_rm+91>: callq 0xffffffff8172b2d0 <mutex_unlock> 0xffffffff814268d0 <scsi_proc_hostdir_rm+96>: pop %rbx 0xffffffff814268d1 <scsi_proc_hostdir_rm+97>: pop %rbp 0xffffffff814268d2 <scsi_proc_hostdir_rm+98>: retq 0xffffffff814268d3: data32 data32 data32 nopw %cs:0x0(%rax,%rax,1) End of assembler dump. crash> q
