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59d5af67 | 1 | From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 |
321d628a FG |
2 | From: Andy Lutomirski <luto@kernel.org> |
3 | Date: Mon, 4 Dec 2017 15:07:10 +0100 | |
59d5af67 | 4 | Subject: [PATCH] x86/irq: Remove an old outdated comment about context |
321d628a FG |
5 | tracking races |
6 | MIME-Version: 1.0 | |
7 | Content-Type: text/plain; charset=UTF-8 | |
8 | Content-Transfer-Encoding: 8bit | |
9 | ||
10 | CVE-2017-5754 | |
11 | ||
12 | That race has been fixed and code cleaned up for a while now. | |
13 | ||
14 | Signed-off-by: Andy Lutomirski <luto@kernel.org> | |
15 | Signed-off-by: Thomas Gleixner <tglx@linutronix.de> | |
16 | Reviewed-by: Borislav Petkov <bp@suse.de> | |
17 | Reviewed-by: Thomas Gleixner <tglx@linutronix.de> | |
18 | Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> | |
19 | Cc: Borislav Petkov <bp@alien8.de> | |
20 | Cc: Borislav Petkov <bpetkov@suse.de> | |
21 | Cc: Brian Gerst <brgerst@gmail.com> | |
22 | Cc: Dave Hansen <dave.hansen@intel.com> | |
23 | Cc: Dave Hansen <dave.hansen@linux.intel.com> | |
24 | Cc: David Laight <David.Laight@aculab.com> | |
25 | Cc: Denys Vlasenko <dvlasenk@redhat.com> | |
26 | Cc: Eduardo Valentin <eduval@amazon.com> | |
27 | Cc: Greg KH <gregkh@linuxfoundation.org> | |
28 | Cc: H. Peter Anvin <hpa@zytor.com> | |
29 | Cc: Josh Poimboeuf <jpoimboe@redhat.com> | |
30 | Cc: Juergen Gross <jgross@suse.com> | |
31 | Cc: Linus Torvalds <torvalds@linux-foundation.org> | |
32 | Cc: Peter Zijlstra <peterz@infradead.org> | |
33 | Cc: Rik van Riel <riel@redhat.com> | |
34 | Cc: Will Deacon <will.deacon@arm.com> | |
35 | Cc: aliguori@amazon.com | |
36 | Cc: daniel.gruss@iaik.tugraz.at | |
37 | Cc: hughd@google.com | |
38 | Cc: keescook@google.com | |
39 | Link: https://lkml.kernel.org/r/20171204150605.150551639@linutronix.de | |
40 | Signed-off-by: Ingo Molnar <mingo@kernel.org> | |
41 | (cherry picked from commit 6669a692605547892a026445e460bf233958bd7f) | |
42 | Signed-off-by: Andy Whitcroft <apw@canonical.com> | |
43 | Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com> | |
44 | (cherry picked from commit 7344db7580965d6f9994b6d7b1a74206d7635565) | |
45 | Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com> | |
46 | --- | |
47 | arch/x86/kernel/irq.c | 12 ------------ | |
48 | 1 file changed, 12 deletions(-) | |
49 | ||
50 | diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c | |
51 | index 4ed0aba8dbc8..a84142a910f3 100644 | |
52 | --- a/arch/x86/kernel/irq.c | |
53 | +++ b/arch/x86/kernel/irq.c | |
54 | @@ -222,18 +222,6 @@ __visible unsigned int __irq_entry do_IRQ(struct pt_regs *regs) | |
55 | /* high bit used in ret_from_ code */ | |
56 | unsigned vector = ~regs->orig_ax; | |
57 | ||
58 | - /* | |
59 | - * NB: Unlike exception entries, IRQ entries do not reliably | |
60 | - * handle context tracking in the low-level entry code. This is | |
61 | - * because syscall entries execute briefly with IRQs on before | |
62 | - * updating context tracking state, so we can take an IRQ from | |
63 | - * kernel mode with CONTEXT_USER. The low-level entry code only | |
64 | - * updates the context if we came from user mode, so we won't | |
65 | - * switch to CONTEXT_KERNEL. We'll fix that once the syscall | |
66 | - * code is cleaned up enough that we can cleanly defer enabling | |
67 | - * IRQs. | |
68 | - */ | |
69 | - | |
70 | entering_irq(); | |
71 | ||
72 | /* entering_irq() tells RCU that we're not quiescent. Check it. */ | |
73 | -- | |
74 | 2.14.2 | |
75 |