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Author SHA1 Message Date
Liz Clark 4a4c61b7ce TTY: Wrong unicode value copied in con_set_unimap() 
Bugzilla 40012: PIO_UNIMAP bug: error updating Unicode-to-font map
https://bugzilla.kernel.org/show_bug.cgi?id=40012

The unicode font map for the virtual console is a 32x32x64 table which
allocates rows dynamically as entries are added.  The unicode value
increases sequentially and should count all entries even in empty
rows.  The defect is when copying the unicode font map in con_set_unimap(),
the unicode value is not incremented properly.  The wrong unicode value
is entered in the new font map.

Signed-off-by: Liz Clark <liz.clark@hp.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2012-03-15 13:28:52 -07:00
Zeng Zhaoming 106b5fa700 tty: Fix memory leak in virtual console when enable unicode translation 
Virtual console unicode translation map leaks with following
message when enable kmemleak:

unreferenced object 0xeb5ec450 (size 192):
  comm "setfont", pid 665, jiffies 4294899028 (age 3696.220s)
  hex dump (first 32 bytes):
    e0 5b 9d eb 00 00 00 00 00 00 00 00 80 b9 ea eb  .[..............
    b0 5a 9d eb 00 00 00 00 00 00 00 00 00 00 00 00  .Z..............
  backtrace:
    [<c1533f8c>] kmemleak_alloc+0x3c/0xa0
    [<c114acc2>] kmem_cache_alloc_trace+0xe2/0x250
    [<c13498e8>] con_clear_unimap+0x78/0xd0
    [<c1345552>] vt_ioctl+0x1562/0x1d00
    [<c133aa00>] tty_ioctl+0x230/0x7c0
    [<c1171519>] do_vfs_ioctl+0x79/0x2d0
    [<c11717df>] sys_ioctl+0x6f/0x80
    [<c156601f>] sysenter_do_call+0x12/0x38
    [<ffffffff>] 0xffffffff
unreferenced object 0xeb9d5be0 (size 128):
  comm "setfont", pid 660, jiffies 4294899030 (age 3696.212s)
  hex dump (first 32 bytes):
    60 c2 a6 eb 50 c8 a6 eb c0 54 9d eb 80 59 9d eb  `...P....T...Y..
    90 53 9d eb 60 52 9d eb 60 92 9b eb 00 00 00 00  .S..`R..`.......
  backtrace:
    [<c1533f8c>] kmemleak_alloc+0x3c/0xa0
    [<c114acc2>] kmem_cache_alloc_trace+0xe2/0x250
    [<c134938c>] con_insert_unipair+0x7c/0x150
    [<c1349f8c>] con_set_unimap+0x15c/0x1f0
    [<c13456fb>] vt_ioctl+0x170b/0x1d00
    [<c133aa00>] tty_ioctl+0x230/0x7c0
    [<c1171519>] do_vfs_ioctl+0x79/0x2d0
    [<c11717df>] sys_ioctl+0x6f/0x80
    [<c156601f>] sysenter_do_call+0x12/0x38
    [<ffffffff>] 0xffffffff

The leak caused by con_set_default_unimap() not correct free the old map.

Signed-off-by: Zeng Zhaoming <zengzm.kernel@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
 2012-01-04 16:18:55 -08:00
Greg Kroah-Hartman 60d4ae8d43 TTY: create drivers/tty/vt and move the vt code there 
The vt and other related code is moved into the drivers/tty/vt directory.

Acked-by: Arnd Bergmann <arnd@arndb.de>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
 2010-11-05 08:16:52 -07:00