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| author | Andy Lutomirski <luto@amacapital.net> | 2015-01-22 11:27:58 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-01-29 17:40:56 -0800 |
| commit | 19ecb537faf6445986bf74f8b50f49c88cc5260a (patch) | |
| tree | 2e698366d62e03d8f89afe0258f8325944e77c73 /CREDITS | |
| parent | eeff6c78a31b6a34bd357a0a8302c8635e7c1908 (diff) | |
x86, tls, ldt: Stop checking lm in LDT_empty
commit e30ab185c490e9a9381385529e0fd32f0a399495 upstream.
32-bit programs don't have an lm bit in their ABI, so they can't
reliably cause LDT_empty to return true without resorting to memset.
They shouldn't need to do this.
This should fix a longstanding, if minor, issue in all 64-bit kernels
as well as a potential regression in the TLS hardening code.
Fixes: 41bdc78544b8 x86/tls: Validate TLS entries to protect espfix
Signed-off-by: Andy Lutomirski <luto@amacapital.net>
Cc: torvalds@linux-foundation.org
Link: http://lkml.kernel.org/r/72a059de55e86ad5e2935c80aa91880ddf19d07c.1421954363.git.luto@amacapital.net
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'CREDITS')
0 files changed, 0 insertions, 0 deletions