6.12-stable review patch. If anyone has any objections, please let me know.
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From: Marco Nelissen marco.nelissen@gmail.com
commit f505e6c91e7a22d10316665a86d79f84d9f0ba76 upstream.
On 32-bit kernels, folio_seek_hole_data() was inadvertently truncating a 64-bit value to 32 bits, leading to a possible infinite loop when writing to an xfs filesystem.
Link: https://lkml.kernel.org/r/20250102190540.1356838-1-marco.nelissen@gmail.com Fixes: 54fa39ac2e00 ("iomap: use mapping_seek_hole_data") Signed-off-by: Marco Nelissen marco.nelissen@gmail.com Cc: Matthew Wilcox (Oracle) willy@infradead.org Cc: stable@vger.kernel.org Signed-off-by: Andrew Morton akpm@linux-foundation.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- mm/filemap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/mm/filemap.c +++ b/mm/filemap.c @@ -3004,7 +3004,7 @@ static inline loff_t folio_seek_hole_dat if (ops->is_partially_uptodate(folio, offset, bsz) == seek_data) break; - start = (start + bsz) & ~(bsz - 1); + start = (start + bsz) & ~((u64)bsz - 1); offset += bsz; } while (offset < folio_size(folio)); unlock: