The patch titled
Subject: RE: [fs?] [mm?] INFO: task hung in remove_inode_hugepages
has been added to the -mm mm-unstable branch. Its filename is
mm-gup-introduce-memfd_pin_folios-for-pinning-memfd-folios-fix-2.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-gup-introduce-memfd_pin_folios-for-pinning-memfd-folios-fix-2.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: "Kasireddy, Vivek" <vivek.kasireddy@xxxxxxxxx>
Subject: RE: [fs?] [mm?] INFO: task hung in remove_inode_hugepages
Date: Mon Jul 8 23:04:48 2024 -0700
return -EINVAL if the end offset is greater than the size of memfd
Link: https://lkml.kernel.org/r/IA0PR11MB71850525CBC7D541CAB45DF1F8DB2@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Vivek Kasireddy <vivek.kasireddy@xxxxxxxxx>
Reported-by: <syzbot+f1d7fb4f94764243d23e@xxxxxxxxxxxxxxxxxxxxxxxxx>
Testted-by: <syzbot+f1d7fb4f94764243d23e@xxxxxxxxxxxxxxxxxxxxxxxxx>
Cc: Dave Airlie <airlied@xxxxxxxxxx>
Cc: Gerd Hoffmann <kraxel@xxxxxxxxxx>
Cc: Muchun Song <muchun.song@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/gup.c | 3 +++
1 file changed, 3 insertions(+)
--- a/mm/gup.c~mm-gup-introduce-memfd_pin_folios-for-pinning-memfd-folios-fix-2
+++ a/mm/gup.c
@@ -3814,6 +3814,9 @@ long memfd_pin_folios(struct file *memfd
if (!shmem_file(memfd) && !is_file_hugepages(memfd))
return -EINVAL;
+ if (end >= i_size_read(file_inode(memfd)))
+ return -EINVAL;
+
if (is_file_hugepages(memfd)) {
h = hstate_file(memfd);
pgshift = huge_page_shift(h);
_
Patches currently in -mm which might be from vivek.kasireddy@xxxxxxxxx are
mm-gup-introduce-unpin_folio-unpin_folios-helpers.patch
mm-gup-introduce-check_and_migrate_movable_folios.patch
mm-gup-introduce-memfd_pin_folios-for-pinning-memfd-folios.patch
mm-gup-introduce-memfd_pin_folios-for-pinning-memfd-folios-fix-2.patch
udmabuf-use-vmf_insert_pfn-and-vm_pfnmap-for-handling-mmap.patch
udmabuf-add-back-support-for-mapping-hugetlb-pages.patch
udmabuf-convert-udmabuf-driver-to-use-folios.patch
udmabuf-pin-the-pages-using-memfd_pin_folios-api.patch
selftests-udmabuf-add-tests-to-verify-data-after-page-migration.patch
