fbcon: Retry rotated font allocation after failure

fbcon_rotate_font() records the font, its geometry and the rotation in
par->rotated before calling font_data_rotate(). If the allocation
fails, the error path clears par->rotated.buf, but the recorded key
already looks up to date, so the next call takes the early-out and
never retries. The rotated putcs/cursor ops keep returning early on
the NULL buffer, and the console stays blank even after memory is
available again.

Also test par->rotated.buf in the early-out, so a failed allocation
is retried on the next call: at the next fbcon_switch(),
fbcon_modechanged() or font change.

Fixes: e4ef723d8975 ("fbcon: Avoid OOB font access if console rotation fails")
Cc: stable@vger.kernel.org
Signed-off-by: Yao Yiqi <yaoyiqi3@huawei.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Helge Deller <deller@gmx.de>

0 files changed, 0 insertions, 0 deletions