122 lines
5.2 KiB
Diff
122 lines
5.2 KiB
Diff
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This fixes an oops caused by buslogic driver when initializing a BusLogic
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MultiMaster adapter. Initialization code used scope of a variable
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incorrectly which created a NULL pointer. Oops message is below:
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BUG: unable to handle kernel NULL pointer dereference at 0000000c
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IP: [<c150c137>] blogic_init_mm_probeinfo.isra.17+0x20a/0x583
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*pde = 00000000
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Oops: 002 [#1] PREEMPT SMP
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Modules linked in:
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CPU: 1 PID: 1 Comm: swapper/0 Not tainted 3.11.1.puz1 #1
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Hardware name: /Canterwood, BIOS 6.00 PG 05/16/2003
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task: f7050000 ti: f7054000 task.ti: f7054000
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EIP: 0060:[<c150c137>] EFLAGS: 00010246 CPU:1
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EIP is at blogic_init_mm_probeinfo.isra.17+0x20a/0x583
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EAX: 00000013 EBX: 00000000 ECX: 00000000 EDX: f8001000
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ESI: f71cb800 EDI: f7388000 EBP: 00007800 ESP: f7055c84
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DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
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CR0: 8005003b CR2: 0000000c CR3: 0154f000 CR4: 000007d0
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Stack:
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0000001c 00000000 c11a59f6 f7055c98 00008130 ffffffff ffffffff 00000000
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00000003 00000000 00000000 00000000 00000013 f8001000 00000001 000003d0
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00000000 00000000 00000000 c14e3f84 f78803c8 00000000 f738c000 000000e9
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Call Trace:
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[<c11a59f6>] ? pci_get_subsys+0x33/0x38
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[<c150c4fb>] ? blogic_init_probeinfo_list+0x4b/0x19e
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[<c108d593>] ? __alloc_pages_nodemask+0xe3/0x623
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[<c108d593>] ? __alloc_pages_nodemask+0xe3/0x623
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[<c10fb99e>] ? sysfs_link_sibling+0x61/0x8d
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[<c10b0519>] ? kmem_cache_alloc+0x8b/0xb5
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[<c150cce5>] ? blogic_init+0xa1/0x10e8
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[<c10fc0a8>] ? sysfs_add_one+0x10/0x9d
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[<c10fc18a>] ? sysfs_addrm_finish+0x12/0x85
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[<c10fca37>] ? sysfs_do_create_link_sd+0x9d/0x1b4
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[<c117c272>] ? blk_register_queue+0x69/0xb3
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[<c10fcb68>] ? sysfs_create_link+0x1a/0x2c
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[<c1181a07>] ? add_disk+0x1a1/0x3c7
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[<c138737b>] ? klist_next+0x60/0xc3
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[<c122cc3a>] ? scsi_dh_detach+0x68/0x68
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[<c1213e36>] ? bus_for_each_dev+0x51/0x61
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[<c1000356>] ? do_one_initcall+0x22/0x12c
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[<c10f3688>] ? __proc_create+0x8c/0xba
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[<c150cc44>] ? blogic_setup+0x5f6/0x5f6
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[<c14e94aa>] ? repair_env_string+0xf/0x4d
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[<c14e949b>] ? do_early_param+0x71/0x71
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[<c103efaa>] ? parse_args+0x21f/0x33d
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[<c14e9a54>] ? kernel_init_freeable+0xdf/0x17d
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[<c14e949b>] ? do_early_param+0x71/0x71
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[<c1388b64>] ? kernel_init+0x8/0xc0
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[<c1392222>] ? ret_from_kernel_thread+0x6/0x28
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[<c1392227>] ? ret_from_kernel_thread+0x1b/0x28
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[<c1388b5c>] ? rest_init+0x6c/0x6c
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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
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c7 44 24 08 04 00 00 00 8d 44 24 4c 89
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EIP: [<c150c137>] blogic_init_mm_probeinfo.isra.17+0x20a/0x583 SS:ESP 0068:f7055c84
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CR2: 000000000000000c
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---[ end trace 17f45f5196d40487 ]---
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Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000009
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Signed-off-by: Khalid Aziz <khalid.aziz@xxxxxxxxxx>
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Cc: <stable@xxxxxxxxxxxxxxx> # 3.11.x
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Cc: Khalid Aziz <khalid@xxxxxxxxxxxxxx>
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Reported-by: Pierre Uszynski <pierre@xxxxxxxxx>
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Tested-by: Pierre Uszynski <pierre@xxxxxxxxx>
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---
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drivers/scsi/BusLogic.c | 16 ++++++++--------
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1 file changed, 8 insertions(+), 8 deletions(-)
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diff --git a/drivers/scsi/BusLogic.c b/drivers/scsi/BusLogic.c
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index feab3a5..757eb07 100644
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--- a/drivers/scsi/BusLogic.c
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+++ b/drivers/scsi/BusLogic.c
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@@ -696,7 +696,7 @@ static int __init blogic_init_mm_probeinfo(struct blogic_adapter *adapter)
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while ((pci_device = pci_get_device(PCI_VENDOR_ID_BUSLOGIC,
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PCI_DEVICE_ID_BUSLOGIC_MULTIMASTER,
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pci_device)) != NULL) {
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- struct blogic_adapter *adapter = adapter;
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+ struct blogic_adapter *host_adapter = adapter;
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struct blogic_adapter_info adapter_info;
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enum blogic_isa_ioport mod_ioaddr_req;
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unsigned char bus;
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@@ -744,9 +744,9 @@ static int __init blogic_init_mm_probeinfo(struct blogic_adapter *adapter)
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known and enabled, note that the particular Standard ISA I/O
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Address should not be probed.
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*/
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- adapter->io_addr = io_addr;
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- blogic_intreset(adapter);
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- if (blogic_cmd(adapter, BLOGIC_INQ_PCI_INFO, NULL, 0,
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+ host_adapter->io_addr = io_addr;
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+ blogic_intreset(host_adapter);
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+ if (blogic_cmd(host_adapter, BLOGIC_INQ_PCI_INFO, NULL, 0,
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&adapter_info, sizeof(adapter_info)) ==
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sizeof(adapter_info)) {
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if (adapter_info.isa_port < 6)
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@@ -762,7 +762,7 @@ static int __init blogic_init_mm_probeinfo(struct blogic_adapter *adapter)
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I/O Address assigned at system initialization.
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*/
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mod_ioaddr_req = BLOGIC_IO_DISABLE;
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- blogic_cmd(adapter, BLOGIC_MOD_IOADDR, &mod_ioaddr_req,
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+ blogic_cmd(host_adapter, BLOGIC_MOD_IOADDR, &mod_ioaddr_req,
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sizeof(mod_ioaddr_req), NULL, 0);
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/*
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For the first MultiMaster Host Adapter enumerated,
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@@ -779,12 +779,12 @@ static int __init blogic_init_mm_probeinfo(struct blogic_adapter *adapter)
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fetch_localram.offset = BLOGIC_AUTOSCSI_BASE + 45;
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fetch_localram.count = sizeof(autoscsi_byte45);
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- blogic_cmd(adapter, BLOGIC_FETCH_LOCALRAM,
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+ blogic_cmd(host_adapter, BLOGIC_FETCH_LOCALRAM,
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&fetch_localram, sizeof(fetch_localram),
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&autoscsi_byte45,
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sizeof(autoscsi_byte45));
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- blogic_cmd(adapter, BLOGIC_GET_BOARD_ID, NULL, 0, &id,
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- sizeof(id));
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+ blogic_cmd(host_adapter, BLOGIC_GET_BOARD_ID, NULL, 0,
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+ &id, sizeof(id));
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if (id.fw_ver_digit1 == '5')
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force_scan_order =
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autoscsi_byte45.force_scan_order;
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--
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1.7.10.4
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