diff options
| author | Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | 2018-05-18 13:35:22 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2018-05-19 12:56:57 +0300 |
| commit | 30bbf728ba91b1e8b0e539126cd105ad7e2fa16a (patch) | |
| tree | fae77b305463b1f1575cc837bb8dd8aee79c0650 | |
| parent | 177bfd725bd1b67c7254248cf19f0465d493e631 (diff) | |
| download | linux-30bbf728ba91b1e8b0e539126cd105ad7e2fa16a.tar.xz | |
x86/boot/compressed/64: Fix trampoline page table address calculation
Hugh noticied that we calculate the address of the trampoline page table
incorrectly in cleanup_trampoline().
TRAMPOLINE_32BIT_PGTABLE_OFFSET has to be divided by sizeof(unsigned long),
since trampoline_32bit is an 'unsigned long' pointer.
TRAMPOLINE_32BIT_PGTABLE_OFFSET is zero so the bug doesn't have a
visible effect.
Reported-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Fixes: e9d0e6330eb8 ("x86/boot/compressed/64: Prepare new top-level page table for trampoline")
Link: http://lkml.kernel.org/r/20180518103528.59260-2-kirill.shutemov@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
| -rw-r--r-- | arch/x86/boot/compressed/pgtable_64.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/boot/compressed/pgtable_64.c b/arch/x86/boot/compressed/pgtable_64.c index a362fa0b849c..23707e1da1ff 100644 --- a/arch/x86/boot/compressed/pgtable_64.c +++ b/arch/x86/boot/compressed/pgtable_64.c @@ -130,7 +130,7 @@ void cleanup_trampoline(void *pgtable) { void *trampoline_pgtable; - trampoline_pgtable = trampoline_32bit + TRAMPOLINE_32BIT_PGTABLE_OFFSET; + trampoline_pgtable = trampoline_32bit + TRAMPOLINE_32BIT_PGTABLE_OFFSET / sizeof(unsigned long); /* * Move the top level page table out of trampoline memory, |