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author | Hugh Dickins <hugh@veritas.com> | 2007-05-26 00:39:17 +0100 |
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committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-25 17:37:46 -0700 |
commit | f4d43bd579f13219ffd3cae48432eab5bbac2d6f (patch) | |
tree | b3376f267b2e519506633d0bdf73b8cb6d90a981 /scripts | |
parent | 1ea0975875294964853209927feccdf6bc8cf5f9 (diff) |
fix compat console unimap regression
Why is it that since the 2f1a2ccb9c0de632ab07193becf5f7121794f6ae console
UTF-8 fixes went into 2.6.22-rc1, the PowerMac G5 shows only inverse video
question marks for the text on tty2-6? whereas tty1 is fine, and so is x86.
No fault of that patch: by removing the old fallback behaviour, it reveals
that 32-bit setfont running on 64-bit kernels has only really worked on
the current console, the rest getting faked by that inadequate fallback.
Bring the compat do_unimap_ioctl into line with the main one: PIO_UNIMAP
and GIO_UNIMAP apply to the specified tty, not redirected to fg_console.
Use the same checks, and most particularly, remember to check access_ok:
con_set_unimap and con_get_unimap are using __get_user and __put_user.
And the compat vt_check should ask for the same capability as the main
one, CAP_SYS_TTY_CONFIG rather than CAP_SYS_ADMIN. Added in vt_ioctl's
vc_cons_allocated check for safety, though failure may well be impossible.
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'scripts')
0 files changed, 0 insertions, 0 deletions