Follow-up Comment #14, bug #32472 (project grub):
I have found some errors in code and provide a patch:
grub_util_biosdisk_flush():
grub_util_biosdisk_flush() tries to open device as RDONLY and flush() after
that. This will not work. As I think, it should not try to open closed device,
and second, it should not try to flush devices opened read-only. Also it
should check return values of fsync() and ioctl()
open_device():
In case of error during open, disk structure will be corrupted (data->dev
points to free()d location. data->fd close()d, but still > 0.)
(The same issue in second place of that function)
grub_util_biosdisk_close():
simplifiction for use new grub_util_biosdisk_flush().
(file #23298)
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File name: z.patch Size:2 KB
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