On Mon, Mar 10, 2025 at 09:48:21AM +0100, Miguel García wrote: > From: Konstantin Komarov <almaz.alexandrovich@xxxxxxxxxxxxxxxxxxxx> > > commit 91a4b1ee78cb100b19b70f077c247f211110348f upstream. > > This patch is a backport and fixes an UBSAN warning about shift-out-of-bounds in > ntfs_fill_super() function of the NTFS3 driver. The original code > incorrectly calculated MFT record size, causing undefined behavior > when performing bit shifts with values that exceed type limits. > > The fix has been verified by executing the syzkaller reproducer test case. > After applying this patch, the system successfully handles the test case > without kernel panic or UBSAN warnings. > > Bug: https://syzkaller.appspot.com/bug?extid=010986becd65dbf9464b > Reported-by: syzbot+010986becd65dbf9464b@xxxxxxxxxxxxxxxxxxxxxxxxx > Cc: <stable@xxxxxxxxxxxxxxx> > Signed-off-by: Konstantin Komarov <almaz.alexandrovich@xxxxxxxxxxxxxxxxxxxx> > Signed-off-by: Miguel Garcia Roman <miguelgarciaroman8@xxxxxxxxx> > (cherry picked from commit 91a4b1ee78cb100b19b70f077c247f211110348f) > --- > fs/ntfs3/ntfs_fs.h | 2 ++ > fs/ntfs3/super.c | 63 +++++++++++++++++++++++++++++++++++----------- > 2 files changed, 50 insertions(+), 15 deletions(-) Why was this resent? confused, greg k-h
