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| author | Peter Hurley <peter@hurleysoftware.com> | 2016-01-11 05:36:10 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-01-28 23:13:44 +0100 |
| commit | 02f14c79abe26a2045669e34baf2c8902d13ae54 (patch) | |
| tree | 3802df787e3d3e01ee19a4b177954f8ba4db4f38 | |
| parent | n_tty: Ignore all read data when closing (diff) | |
| download | linux-02f14c79abe26a2045669e34baf2c8902d13ae54.tar.xz linux-02f14c79abe26a2045669e34baf2c8902d13ae54.zip | |
ia64: Pin controlling tty for unaligned fault message
Prevent destruction of the controlling tty before tty_write_message()
can determine if the tty is safe to use.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | arch/ia64/kernel/unaligned.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/arch/ia64/kernel/unaligned.c b/arch/ia64/kernel/unaligned.c index 622772b7fb6c..e7ae6088350a 100644 --- a/arch/ia64/kernel/unaligned.c +++ b/arch/ia64/kernel/unaligned.c @@ -1336,8 +1336,11 @@ ia64_handle_unaligned (unsigned long ifa, struct pt_regs *regs) * Don't call tty_write_message() if we're in the kernel; we might * be holding locks... */ - if (user_mode(regs)) - tty_write_message(current->signal->tty, buf); + if (user_mode(regs)) { + struct tty_struct *tty = get_current_tty(); + tty_write_message(tty, buf); + tty_kref_put(tty); + } buf[len-1] = '\0'; /* drop '\r' */ /* watch for command names containing %s */ printk(KERN_WARNING "%s", buf); |