[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH 2/6] trace: fix T_INFO_FIRST_OFFSET
This wasn't defined correctly, thus allowing in the num_online_cpus() == NR_CPUS case to pass a corrupted MFN to Dom0. Signed-off-by: Jan Beulich <jbeulich@xxxxxxxxxx> --- 2010-06-15.orig/xen/common/trace.c 2010-06-28 11:58:37.000000000 +0200 +++ 2010-06-15/xen/common/trace.c 2010-06-28 11:58:37.000000000 +0200 @@ -51,7 +51,7 @@ static struct t_info *t_info; #define T_INFO_PAGES 2 /* Size fixed at 2 pages for now. */ #define T_INFO_SIZE ((T_INFO_PAGES)*(PAGE_SIZE)) /* t_info.tbuf_size + list of mfn offsets + 1 to round up / sizeof uint32_t */ -#define T_INFO_FIRST_OFFSET ((sizeof(int16_t) + NR_CPUS * sizeof(int16_t) + 1) / sizeof(uint32_t)) +#define T_INFO_FIRST_OFFSET (((2 + NR_CPUS) * sizeof(uint16_t)) / sizeof(uint32_t)) static DEFINE_PER_CPU_READ_MOSTLY(struct t_buf *, t_bufs); static DEFINE_PER_CPU_READ_MOSTLY(unsigned char *, t_data); static DEFINE_PER_CPU_READ_MOSTLY(spinlock_t, t_lock); Attachment:
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