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Khalid Aziz authored
This fixes an oops caused by buslogic driver when initializing a BusLogic MultiMaster adapter. Initialization code used scope of a variable incorrectly which created a NULL pointer. Oops message is below: BUG: unable to handle kernel NULL pointer dereference at 0000000c IP: [<c150c137>] blogic_init_mm_probeinfo.isra.17+0x20a/0x583 *pde = 00000000 Oops: 002 [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 1 Comm: swapper/0 Not tainted 3.11.1.puz1 #1 Hardware name: /Canterwood, BIOS 6.00 PG 05/16/2003 task: f7050000 ti: f7054000 task.ti: f7054000 EIP: 0060:[<c150c137>] EFLAGS: 00010246 CPU:1 EIP is at blogic_init_mm_probeinfo.isra.17+0x20a/0x583 EAX: 00000013 EBX: 00000000 ECX: 00000000 EDX: f8001000 ESI: f71cb800 EDI: f7388000 EBP: 00007800 ESP: f7055c84 DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 CR0: 8005003b CR2: 0000000c CR3: 0154f000 CR4: 000007d0 Stack: 0000001c 00000000 c11a59f6 f7055c98 00008130 ffffffff ffffffff 00000000 00000003 00000000 00000000 00000000 00000013 f8001000 00000001 000003d0 00000000 00000000 00000000 c14e3f84 f78803c8 00000000 f738c000 000000e9 Call Trace: [<c11a59f6>] ? pci_get_subsys+0x33/0x38 [<c150c4fb>] ? blogic_init_probeinfo_list+0x4b/0x19e [<c108d593>] ? __alloc_pages_nodemask+0xe3/0x623 [<c108d593>] ? __alloc_pages_nodemask+0xe3/0x623 [<c10fb99e>] ? sysfs_link_sibling+0x61/0x8d [<c10b0519>] ? kmem_cache_alloc+0x8b/0xb5 [<c150cce5>] ? blogic_init+0xa1/0x10e8 [<c10fc0a8>] ? sysfs_add_one+0x10/0x9d [<c10fc18a>] ? sysfs_addrm_finish+0x12/0x85 [<c10fca37>] ? sysfs_do_create_link_sd+0x9d/0x1b4 [<c117c272>] ? blk_register_queue+0x69/0xb3 [<c10fcb68>] ? sysfs_create_link+0x1a/0x2c [<c1181a07>] ? add_disk+0x1a1/0x3c7 [<c138737b>] ? klist_next+0x60/0xc3 [<c122cc3a>] ? scsi_dh_detach+0x68/0x68 [<c1213e36>] ? bus_for_each_dev+0x51/0x61 [<c1000356>] ? do_one_initcall+0x22/0x12c [<c10f3688>] ? __proc_create+0x8c/0xba [<c150cc44>] ? blogic_setup+0x5f6/0x5f6 [<c14e94aa>] ? repair_env_string+0xf/0x4d [<c14e949b>] ? do_early_param+0x71/0x71 [<c103efaa>] ? parse_args+0x21f/0x33d [<c14e9a54>] ? kernel_init_freeable+0xdf/0x17d [<c14e949b>] ? do_early_param+0x71/0x71 [<c1388b64>] ? kernel_init+0x8/0xc0 [<c1392222>] ? ret_from_kernel_thread+0x6/0x28 [<c1392227>] ? ret_from_kernel_thread+0x1b/0x28 [<c1388b5c>] ? rest_init+0x6c/0x6c Code: 89 44 24 10 0f b6 44 24 3d 89 44 24 0c c7 44 24 08 00 00 00 00 c7 44 24 04 38 62 46 c1 c7 04 24 02 00 00 00 e8 78 13 d2 ff 31 db <89> 6b 0c b0 20 89 ea ee c7 44 24 08 04 00 00 00 8d 44 24 4c 89 EIP: [<c150c137>] blogic_init_mm_probeinfo.isra.17+0x20a/0x583 SS:ESP 0068:f7055c84 CR2: 000000000000000c ---[ end trace 17f45f5196d40487 ]--- Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000009 Signed-off-by:
Khalid Aziz <khalid.aziz@oracle.com> Cc: <stable@vger.kernel.org> # 3.11.x Reported-by:
Pierre Uszynski <pierre@rahul.net> Tested-by:
Pierre Uszynski <pierre@rahul.net> Signed-off-by:
James Bottomley <JBottomley@Parallels.com>
6541932e