Kernel/linux-next
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git synced 2025-01-17 22:05:08 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

filemap: avoid truncating 64-bit offset to 32 bits

Browse Source 
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>
This commit is contained in:
Marco Nelissen 2025-01-02 11:04:11 -08:00 committed by Andrew Morton
parent 4bbb6df62c
commit f505e6c91e
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
mm/filemap.c
View File

@ -2996,7 +2996,7 @@ static inline loff_t folio_seek_hole_data(struct xa_state *xas,
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: