[ Sasha's backport helper bot ]
Hi,
✅ All tests passed successfully. No issues detected. No action required from the submitter.
The upstream commit SHA1 provided is correct: 28464bbb2ddc199433383994bcb9600c8034afa1
WARNING: Author mismatch between patch and upstream commit: Backport author: Isaac J. Manjarres isaacmanjarres@google.com Commit author: Lorenzo Stoakes lstoakes@gmail.com
Status in newer kernel trees: 6.15.y | Present (exact SHA1) 6.12.y | Present (exact SHA1) 6.6.y | Not found 6.1.y | Not found 5.15.y | Not found 5.10.y | Not found
Note: The patch differs from the upstream commit: --- 1: 28464bbb2ddc ! 1: 3f153c98f29a mm: update memfd seal write check to include F_SEAL_WRITE @@ Metadata ## Commit message ## mm: update memfd seal write check to include F_SEAL_WRITE
+ [ Upstream commit 28464bbb2ddc199433383994bcb9600c8034afa1 ] + The seal_check_future_write() function is called by shmem_mmap() or hugetlbfs_file_mmap() to disallow any future writable mappings of an memfd sealed this way. @@ Commit message Cc: Mike Kravetz mike.kravetz@oracle.com Cc: Muchun Song muchun.song@linux.dev Signed-off-by: Andrew Morton akpm@linux-foundation.org + Cc: stable@vger.kernel.org + Signed-off-by: Isaac J. Manjarres isaacmanjarres@google.com
## fs/hugetlbfs/inode.c ## @@ fs/hugetlbfs/inode.c: static int hugetlbfs_file_mmap(struct file *file, struct vm_area_struct *vma) - vm_flags_set(vma, VM_HUGETLB | VM_DONTEXPAND); + vma->vm_flags |= VM_HUGETLB | VM_DONTEXPAND; vma->vm_ops = &hugetlb_vm_ops;
- ret = seal_check_future_write(info->seals, vma); @@ fs/hugetlbfs/inode.c: static int hugetlbfs_file_mmap(struct file *file, struct v
## include/linux/mm.h ## -@@ include/linux/mm.h: static inline void mem_dump_obj(void *object) {} - #endif +@@ include/linux/mm.h: static inline int pages_identical(struct page *page1, struct page *page2) + }
/** - * seal_check_future_write - Check for F_SEAL_FUTURE_WRITE flag and handle it @@ include/linux/mm.h: static inline void mem_dump_obj(void *object) {}
## mm/shmem.c ## @@ mm/shmem.c: static int shmem_mmap(struct file *file, struct vm_area_struct *vma) - struct shmem_inode_info *info = SHMEM_I(inode); + struct shmem_inode_info *info = SHMEM_I(file_inode(file)); int ret;
- ret = seal_check_future_write(info->seals, vma);
---
Results of testing on various branches:
| Branch | Patch Apply | Build Test | |---------------------------|-------------|------------| | 5.4 | Success | Success |