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| author |   Lan Tianyu <Tianyu.Lan@microsoft.com> | 2019-02-25 22:31:14 +0800 |
|---|---|---|
| committer |   Thomas Gleixner <tglx@linutronix.de> | 2019-02-28 11:58:29 +0100 |
| commit | 9cd05ad2910b55238e3c720c99ad896dc538301b (patch) | |
| tree | d30a371d6e7e33b99e2deef018a4a1b3f39d95d6 /arch | |
| parent | x86/uaccess: Don't leak the AC flag into __put_user() value evaluation (diff) | |
| download | linux-dev-9cd05ad2910b55238e3c720c99ad896dc538301b.tar.xz linux-dev-9cd05ad2910b55238e3c720c99ad896dc538301b.zip | |
x86/hyper-v: Fix definition of HV_MAX_FLUSH_REP_COUNT
The max flush rep count of HvFlushGuestPhysicalAddressList hypercall is
equal with how many entries of union hv_gpa_page_range can be populated
into the input parameter page.
The code lacks parenthesis around PAGE_SIZE - 2 * sizeof(u64) which results
in bogus computations. Add them.
Fixes: cc4edae4b924 ("x86/hyper-v: Add HvFlushGuestAddressList hypercall support")
Signed-off-by: Lan Tianyu <Tianyu.Lan@microsoft.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: kys@microsoft.com
Cc: haiyangz@microsoft.com
Cc: sthemmin@microsoft.com
Cc: sashal@kernel.org
Cc: bp@alien8.de
Cc: hpa@zytor.com
Cc: gregkh@linuxfoundation.org
Cc: devel@linuxdriverproject.org
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/20190225143114.5149-1-Tianyu.Lan@microsoft.com
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/include/asm/hyperv-tlfs.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/include/asm/hyperv-tlfs.h b/arch/x86/include/asm/hyperv-tlfs.h index 705dafc2d11a..2bdbbbcfa393 100644 --- a/arch/x86/include/asm/hyperv-tlfs.h +++ b/arch/x86/include/asm/hyperv-tlfs.h @@ -841,7 +841,7 @@ union hv_gpa_page_range { * count is equal with how many entries of union hv_gpa_page_range can * be populated into the input parameter page. */ -#define HV_MAX_FLUSH_REP_COUNT (PAGE_SIZE - 2 * sizeof(u64) / \ +#define HV_MAX_FLUSH_REP_COUNT ((PAGE_SIZE - 2 * sizeof(u64)) / \ sizeof(union hv_gpa_page_range)) struct hv_guest_mapping_flush_list { |