This is a note to let you know that I've just added the patch titled
tty: vt: fix up tabstops properly
to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: tty-vt-fix-up-tabstops-properly.patch and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.
From f1869a890cdedb92a3fab969db5d0fd982850273 Mon Sep 17 00:00:00 2001
From: Linus Torvalds torvalds@linux-foundation.org Date: Sat, 24 Mar 2018 10:43:26 +0100 Subject: tty: vt: fix up tabstops properly
From: Linus Torvalds torvalds@linux-foundation.org
commit f1869a890cdedb92a3fab969db5d0fd982850273 upstream.
Tabs on a console with long lines do not wrap properly, so correctly account for the line length when computing the tab placement location.
Reported-by: James Holderness j4_james@hotmail.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Cc: stable stable@vger.kernel.org Signed-off-by: Linus Torvalds torvalds@linux-foundation.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/tty/vt/vt.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)
--- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -1725,7 +1725,7 @@ static void reset_terminal(struct vc_dat default_attr(vc); update_attr(vc);
- vc->vc_tab_stop[0] = 0x01010100; + vc->vc_tab_stop[0] = vc->vc_tab_stop[1] = vc->vc_tab_stop[2] = vc->vc_tab_stop[3] = @@ -1769,7 +1769,7 @@ static void do_con_trol(struct tty_struc vc->vc_pos -= (vc->vc_x << 1); while (vc->vc_x < vc->vc_cols - 1) { vc->vc_x++; - if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31))) + if (vc->vc_tab_stop[7 & (vc->vc_x >> 5)] & (1 << (vc->vc_x & 31))) break; } vc->vc_pos += (vc->vc_x << 1); @@ -1829,7 +1829,7 @@ static void do_con_trol(struct tty_struc lf(vc); return; case 'H': - vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31)); + vc->vc_tab_stop[7 & (vc->vc_x >> 5)] |= (1 << (vc->vc_x & 31)); return; case 'Z': respond_ID(tty); @@ -2022,7 +2022,7 @@ static void do_con_trol(struct tty_struc return; case 'g': if (!vc->vc_par[0]) - vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31)); + vc->vc_tab_stop[7 & (vc->vc_x >> 5)] &= ~(1 << (vc->vc_x & 31)); else if (vc->vc_par[0] == 3) { vc->vc_tab_stop[0] = vc->vc_tab_stop[1] =
Patches currently in stable-queue which might be from torvalds@linux-foundation.org are
queue-4.4/tty-vt-fix-up-tabstops-properly.patch queue-4.4/mm-vmalloc-add-interfaces-to-free-unmapped-page-table.patch queue-4.4/kvm-x86-fix-icebp-instruction-handling.patch queue-4.4/x86-mm-implement-free-pmd-pte-page-interfaces.patch