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| author | Marcelo Tosatti <marcelo.tosatti@cyclades.com> | 2005-11-07 00:59:34 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-11-07 07:53:39 -0800 |
| commit | e3f17f0f6e98f58edb13cb38810d93e6d4808e68 (patch) | |
| tree | c442f18da80497cc45644e41e29ac0efe96498a7 | |
| parent | 796f8d9b98fc92a5e9aaea8cf932957850332f51 (diff) | |
| download | linux-e3f17f0f6e98f58edb13cb38810d93e6d4808e68.tar.gz linux-e3f17f0f6e98f58edb13cb38810d93e6d4808e68.tar.bz2 linux-e3f17f0f6e98f58edb13cb38810d93e6d4808e68.zip | |
[PATCH] Only disallow _setting_ of function key string
Mikael Pettersson <mikpe@csd.uu.se> noted that the current 2.6-git (and 2.4)
patch to disallow KDSKBSENT for unpriviledged users should be less restrictive
allowing reading of current function key string entry, but not writing.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | drivers/char/vt_ioctl.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/char/vt_ioctl.c b/drivers/char/vt_ioctl.c index 003dda147cd0..24011e7c81ff 100644 --- a/drivers/char/vt_ioctl.c +++ b/drivers/char/vt_ioctl.c @@ -80,6 +80,9 @@ do_kdsk_ioctl(int cmd, struct kbentry __user *user_kbe, int perm, struct kbd_str if (copy_from_user(&tmp, user_kbe, sizeof(struct kbentry))) return -EFAULT; + if (!capable(CAP_SYS_TTY_CONFIG)) + perm = 0; + switch (cmd) { case KDGKBENT: key_map = key_maps[s]; @@ -193,7 +196,7 @@ do_kdgkb_ioctl(int cmd, struct kbsentry __user *user_kdgkb, int perm) int ret; if (!capable(CAP_SYS_TTY_CONFIG)) - return -EPERM; + perm = 0; kbs = kmalloc(sizeof(*kbs), GFP_KERNEL); if (!kbs) { |