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[SCSI] mpt fusion: fix two potential mem leaks 

The Coverity checker spotted two potential memory leaks in
drivers/message/fusion/mptbase.c::mpt_attach().

There are two returns that may leak the storage allocated for 'ioc'
(sizeof(MPT_ADAPTER) bytes).

A simple fix would be to simply add two kfree() calls before the return
statements, but a better fix (that this patch implements) is to reorder the
code so that if we hit the first return condition we don't have to do the
allocation at all and then just add a kfree() call for the second case.

Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Acked-by: "Moore, Eric Dean" <Eric.Moore@lsil.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
Jesper Juhl 2007-08-10 14:50:51 -07:00 committed by James Bottomley
parent d7383a2346
commit 568761955a
1 changed files with 8 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
drivers/message/fusion/mptbase.c
View File

@ -1458,19 +1458,19 @@ mpt_attach(struct pci_dev *pdev, const struct pci_device_id *id)
struct proc_dir_entry *dent, *ent;
#endif
ioc = kzalloc(sizeof(MPT_ADAPTER), GFP_ATOMIC);
if (ioc == NULL) {
printk(KERN_ERR MYNAM ": ERROR - Insufficient memory to add adapter!\n");
return -ENOMEM;
}
ioc->debug_level = mpt_debug_level;
if (mpt_debug_level)
printk(KERN_INFO MYNAM ": mpt_debug_level=%xh\n", mpt_debug_level);
if (pci_enable_device(pdev))
return r;
ioc = kzalloc(sizeof(MPT_ADAPTER), GFP_ATOMIC);
if (ioc == NULL) {
printk(KERN_ERR MYNAM ": ERROR - Insufficient memory to add adapter!\n");
return -ENOMEM;
}
ioc->debug_level = mpt_debug_level;
dinitprintk(ioc, printk(KERN_WARNING MYNAM ": mpt_adapter_install\n"));
if (!pci_set_dma_mask(pdev, DMA_64BIT_MASK)) {
@ -1478,6 +1478,7 @@ mpt_attach(struct pci_dev *pdev, const struct pci_device_id *id)
": 64 BIT PCI BUS DMA ADDRESSING SUPPORTED\n"));
} else if (pci_set_dma_mask(pdev, DMA_32BIT_MASK)) {
printk(KERN_WARNING MYNAM ": 32 BIT PCI BUS DMA ADDRESSING NOT SUPPORTED\n");
kfree(ioc);
return r;
}