The commit is pushed to "branch-rh9-5.14.0-427.44.1.vz9.80.x-ovz" and will
appear at [email protected]:openvz/vzkernel.git
after rh9-5.14.0-427.44.1.vz9.80.5
------>
commit 89890776e27a0234cdf455a9b792ab6c084f1824
Author: Anthony Yznaga <[email protected]>
Date: Tue Dec 1 11:53:59 2020 -0800
oracle/mm: do not assume only the stack vma exists in setup_arg_pages()
In preparation for allowing vmas to be preserved across exec do not
assume that there is no prev vma to pass to mprotect_fixup() in
setup_arg_pages(). mprotect_fixup() calls vma_merge() which expects
a prev vma to be passed to it if one exists otherwise a VM_WARN_ON
is triggered.
Orabug: 32387875
Signed-off-by: Anthony Yznaga <[email protected]>
Reviewed-by: Mike Kravetz <[email protected]>
Reviewed-by: Liam R. Howlett <[email protected]>
https://virtuozzo.atlassian.net/browse/VSTOR-96305
(cherry picked from Oracle commit cd7f61a98a7f817236fc3d1186e54c2aa3e4f6e7)
Signed-off-by: Konstantin Khorenko <[email protected]>
Feature: oracle/mm: MADV_DOEXEC madvise() flag
---
fs/exec.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/exec.c b/fs/exec.c
index 0b3e0eef70a6..f109cdc4aa37 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -770,7 +770,7 @@ int setup_arg_pages(struct linux_binprm *bprm,
unsigned long stack_shift;
struct mm_struct *mm = current->mm;
struct vm_area_struct *vma = bprm->vma;
- struct vm_area_struct *prev = NULL;
+ struct vm_area_struct *prev = vma->vm_prev;
unsigned long vm_flags;
unsigned long stack_base;
unsigned long stack_size;
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