[PATCH] ntfs : fix shift-out-of-bounds in ntfs_iget
From: Manas Ghandat <hidden>
Date: 2023-08-08 18:02:56
Also in:
linux-fsdevel, lkml
Subsystem:
filesystems (vfs and infrastructure), ntfs filesystem, the rest · Maintainers:
Alexander Viro, Christian Brauner, Namjae Jeon, Hyunchul Lee, Linus Torvalds
Added a check to the compression_unit so that out of bound doesn't occur. Signed-off-by: Manas Ghandat <redacted> Reported-by: syzbot+4768a8f039aa677897d0@syzkaller.appspotmail.com --- fs/ntfs/inode.c | 11 +++++++++++ 1 file changed, 11 insertions(+)
diff --git a/fs/ntfs/inode.c b/fs/ntfs/inode.c
index 6c3f38d66579..2ee100a7df32 100644
--- a/fs/ntfs/inode.c
+++ b/fs/ntfs/inode.c@@ -1077,6 +1077,17 @@ static int ntfs_read_locked_inode(struct inode *vi) goto unm_err_out; } if (a->data.non_resident.compression_unit) { + if(a->data.non_resident.compression_unit + + vol->cluster_size_bits > 32) { + ntfs_error(vi->i_sb, "Found " + "non-standard " + "compression unit (%u). " + "Cannot handle this.", + a->data.non_resident. + compression_unit); + err = -EOPNOTSUPP; + goto unm_err_out; + } ni->itype.compressed.block_size = 1U << (a->data.non_resident. compression_unit +
--
2.37.2
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