6.12-stable review patch. If anyone has any objections, please let me know.
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From: David Hildenbrand david@redhat.com
commit 3754137d263f52f4b507cf9ae913f8f0497d1b0e upstream.
Entries (including flags) are u64, even on 32bit. So right now we are cutting of the flags on 32bit. This way, for example the cow selftest complains about:
# ./cow ... Bail Out! read and ioctl return unmatched results for populated: 0 1
Link: https://lkml.kernel.org/r/20241217195000.1734039-1-david@redhat.com Fixes: 2c1f057e5be6 ("fs/proc/task_mmu: properly detect PM_MMAP_EXCLUSIVE per page of PMD-mapped THPs") Signed-off-by: David Hildenbrand david@redhat.com Cc: Oscar Salvador osalvador@suse.de Cc: stable@vger.kernel.org Signed-off-by: Andrew Morton akpm@linux-foundation.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/proc/task_mmu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/fs/proc/task_mmu.c +++ b/fs/proc/task_mmu.c @@ -1810,7 +1810,7 @@ static int pagemap_pmd_range(pmd_t *pmdp }
for (; addr != end; addr += PAGE_SIZE, idx++) { - unsigned long cur_flags = flags; + u64 cur_flags = flags; pagemap_entry_t pme;
if (folio && (flags & PM_PRESENT) &&