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| author | Julia Lawall <julia@diku.dk> | 2010-08-01 19:23:35 +0200 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@suse.de> | 2010-08-06 12:06:08 -0500 |
| commit | 823d219f23b958292279cfdc8583dc4f1f91c2d5 (patch) | |
| tree | 509a25fdb647ff5021b8ecad40d26898c59bee85 /drivers/scsi/pm8001 | |
| parent | e8ed741fcd521a25f1d983ec81f72ac823d8429a (diff) | |
| download | lwn-823d219f23b958292279cfdc8583dc4f1f91c2d5.tar.gz lwn-823d219f23b958292279cfdc8583dc4f1f91c2d5.zip | |
[SCSI] pm8001: introduce missing kfree
Error handling code following a kmalloc should free the allocated data.
The semantic match that finds the problem is as follows:
(http://www.emn.fr/x-info/coccinelle/)
// <smpl>
@r exists@
local idexpression x;
expression E;
identifier f,f1;
position p1,p2;
@@
x@p1 = \(kmalloc\|kzalloc\|kcalloc\)(...);
<... when != x
when != if (...) { <+...x...+> }
when != (x) == NULL
when != (x) != NULL
when != (x) == 0
when != (x) != 0
(
x->f1 = E
|
(x->f1 == NULL || ...)
|
f(...,x->f1,...)
)
...>
(
return <+...x...+>;
|
return@p2 ...;
)
@script:python@
p1 << r.p1;
p2 << r.p2;
@@
print "* file: %s kmalloc %s return %s" % (p1[0].file,p1[0].line,p2[0].line)
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Acked-by: jack wang <jack_wang@usish.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Diffstat (limited to 'drivers/scsi/pm8001')
| -rw-r--r-- | drivers/scsi/pm8001/pm8001_hwi.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/drivers/scsi/pm8001/pm8001_hwi.c b/drivers/scsi/pm8001/pm8001_hwi.c index 58d1134935ef..9793aa6afb10 100644 --- a/drivers/scsi/pm8001/pm8001_hwi.c +++ b/drivers/scsi/pm8001/pm8001_hwi.c @@ -4199,8 +4199,10 @@ static int pm8001_chip_get_nvmd_req(struct pm8001_hba_info *pm8001_ha, circularQ = &pm8001_ha->inbnd_q_tbl[0]; memset(&nvmd_req, 0, sizeof(nvmd_req)); rc = pm8001_tag_alloc(pm8001_ha, &tag); - if (rc) + if (rc) { + kfree(fw_control_context); return rc; + } ccb = &pm8001_ha->ccb_info[tag]; ccb->ccb_tag = tag; ccb->fw_control_context = fw_control_context; @@ -4276,8 +4278,10 @@ static int pm8001_chip_set_nvmd_req(struct pm8001_hba_info *pm8001_ha, ioctl_payload->length); memset(&nvmd_req, 0, sizeof(nvmd_req)); rc = pm8001_tag_alloc(pm8001_ha, &tag); - if (rc) + if (rc) { + kfree(fw_control_context); return rc; + } ccb = &pm8001_ha->ccb_info[tag]; ccb->fw_control_context = fw_control_context; ccb->ccb_tag = tag; @@ -4387,6 +4391,7 @@ pm8001_chip_fw_flash_update_req(struct pm8001_hba_info *pm8001_ha, fw_control->len, 0) != 0) { PM8001_FAIL_DBG(pm8001_ha, pm8001_printk("Mem alloc failure\n")); + kfree(fw_control_context); return -ENOMEM; } } @@ -4401,8 +4406,10 @@ pm8001_chip_fw_flash_update_req(struct pm8001_hba_info *pm8001_ha, fw_control_context->virtAddr = buffer; fw_control_context->len = fw_control->len; rc = pm8001_tag_alloc(pm8001_ha, &tag); - if (rc) + if (rc) { + kfree(fw_control_context); return rc; + } ccb = &pm8001_ha->ccb_info[tag]; ccb->fw_control_context = fw_control_context; ccb->ccb_tag = tag; |