In pfm_smpl_buffer_alloc, insert_vm_struct may also return -ENOMEM, so
need check it too.
And insert_vm_struct needn't consider about pfm_remap_buffer in failure
process ("goto error" is enough):
- pfm_remap_buffer doen't consider about remap_pfn_range.
- It is about the relationship between vma and smpl_buf.
- SO if both vma and smpl_buf are released ("goto error"), all things
are OK.
Signed-off-by: Chen Gang <gang.chen.5i5j@xxxxxxxxx>
---
arch/ia64/kernel/perfmon.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/arch/ia64/kernel/perfmon.c b/arch/ia64/kernel/perfmon.c
index 60e02f7..ae77946 100644
--- a/arch/ia64/kernel/perfmon.c
+++ b/arch/ia64/kernel/perfmon.c
@@ -2330,7 +2330,11 @@ pfm_smpl_buffer_alloc(struct task_struct *task, struct file *filp, pfm_context_t
* now insert the vma in the vm list for the process, must be
* done with mmap lock held
*/
- insert_vm_struct(mm, vma);
+ if (insert_vm_struct(mm, vma)) {
+ DPRINT(("Can't insert vm structure.\n"));
+ up_write(&task->mm->mmap_sem);
+ goto error;
+ }
vm_stat_account(vma->vm_mm, vma->vm_flags, vma->vm_file,
vma_pages(vma));
--
--
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