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Changes for 5.4:

Browse source 
- Prohibit writing to active swap files and swap partitions.
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Merge tag 'vfs-5.4-merge-1' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux

Pull swap access updates from Darrick Wong:
 "Prohibit writing to active swap files and swap partitions.

  There's no non-malicious use case for allowing userspace to scribble
  on storage that the kernel thinks it owns"

* tag 'vfs-5.4-merge-1' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
  vfs: don't allow writes to swap files
  mm: set S_SWAPFILE on blockdev swap devices
This commit is contained in:
Linus Torvalds 2019-09-18 17:35:20 -07:00
commit e6bc9de714
6 changed files with 52 additions and 18 deletions
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3
fs/block_dev.c
View file

@ -1972,6 +1972,9 @@ ssize_t blkdev_write_iter(struct kiocb *iocb, struct iov_iter *from)
if (bdev_read_only(I_BDEV(bd_inode)))
return -EPERM;
if (IS_SWAPFILE(bd_inode))
return -ETXTBSY;
if (!iov_iter_count(from))
return 0;