[lkml]   [2006]   [Mar]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
Patch in this message
Subject[patch 19/20] cciss: fix use-after-free in cciss_init_one
-stable review patch.  If anyone has any objections, please let us know.

From: Patrick McHardy <>

free_hba() sets hba[i] to NULL, the dereference afterwards results in this
crash. Setting busy_initializing to 0 actually looks unnecessary, but I'm
not entirely sure, which is why I left it in.

cciss: controller appears to be disabled
Unable to handle kernel NULL pointer dereference at virtual address 00000370
printing eip:
*pde = 00000000
Oops: 0002 [#1]
Modules linked in:
CPU: 0
EIP: 0060:[<c1114d53>] Not tainted VLI
EFLAGS: 00010286 (2.6.16 #1)
EIP is at cciss_init_one+0x4e9/0x4fe
eax: 00000000 ebx: c132cd60 ecx: c13154e4 edx: c27d3c00
esi: 00000000 edi: c2748800 ebp: c2536ee4 esp: c2536eb8
ds: 007b es: 007b ss: 0068
Process swapper (pid: 1, threadinfo=c2536000 task=c2535a30)
Stack: <0>00000000 00000000 00000000 c13fdba0 c2536ee8 c13159c0 c2536f38
c132cd60 c132cd60 ffffffed c2536ef0 c10c1d51 c2748800 c2536f04
c132cd60 c2748800 c132cd8c c2536f14 c10c1db8 c2748848 00000000
Call Trace:
[<c10031d5>] show_stack_log_lvl+0xa8/0xb0
[<c1003305>] show_registers+0x102/0x16a
[<c10034a2>] die+0xc1/0x13c
[<c1288160>] do_page_fault+0x38a/0x525
[<c1002e9b>] error_code+0x4f/0x54
[<c10c1d51>] pci_call_probe+0xd/0x10
[<c10c1d85>] __pci_device_probe+0x31/0x43
[<c10c1db8>] pci_device_probe+0x21/0x34
[<c110a654>] driver_probe_device+0x44/0x99
[<c110a73f>] __driver_attach+0x39/0x5d
[<c1109e1c>] bus_for_each_dev+0x35/0x5a
[<c110a777>] driver_attach+0x14/0x16
[<c110a220>] bus_add_driver+0x5c/0x8f
[<c110ab22>] driver_register+0x73/0x78
[<c10c1f6d>] __pci_register_driver+0x5f/0x71
[<c13bf935>] cciss_init+0x1a/0x1c
[<c13aa718>] do_initcalls+0x4c/0x96
[<c13aa77e>] do_basic_setup+0x1c/0x1e
[<c10002b1>] init+0x35/0x118
[<c1000cf5>] kernel_thread_helper+0x5/0xb
Code: 04 b5 e0 de 40 c1 8d 50 04 8b 40 34 e8 3f b7 f9 ff 8b 04 b5 e0 de
40 c1 e8 aa f3 ff ff 89 f0 e8 e8 fa ff ff 8b 04 b5 e0 de 40 c1 <c7> 80
70 03 00 00 00 00 00 00 83 c8 ff 8d 65 f4 5b 5e 5f 5d c3
<0>Kernel panic - not syncing: Attempted to kill init!

Signed-off-by: Patrick McHardy <>
Cc: <>
Signed-off-by: Andrew Morton <>
Signed-off-by: Chris Wright <>
Signed-off-by: Greg Kroah-Hartman <>

drivers/block/cciss.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- linux-2.6.16.orig/drivers/block/cciss.c
+++ linux-2.6.16/drivers/block/cciss.c
@@ -3269,8 +3269,8 @@ clean2:
unregister_blkdev(hba[i]->major, hba[i]->devname);
- free_hba(i);
hba[i]->busy_initializing = 0;
+ free_hba(i);

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2006-03-25 05:33    [from the cache]
©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site