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Commit d5e842c4 authored by Martin Schwidefsky's avatar Martin Schwidefsky
Browse files

[S390] vdso: fix per cpu vdso pointer in lowcore 



The vdso_per_cpu_data entry in the lowcore structure uses __u32
instead of __u64. If the data page is above 4GB the pointer is
truncated and the kernel crashes.

Reported-by: default avatarMijo Safradin <mijo@linux.vnet.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent 1db8508c

arch/s390/include/asm/lowcore.h

+2 −2
Original line number Diff line number Diff line
@@ -384,8 +384,8 @@ struct _lowcore 
        __u32        panic_magic;              /* 0xe00 */



	/* Per cpu primary space access list */

	__u8	     pad_0xe04[0xe3c-0xe04];   /* 0xe04 */

	__u32	     vdso_per_cpu_data;	       /* 0xe3c */

	__u8	     pad_0xe04[0xe38-0xe04];   /* 0xe04 */

	__u64	     vdso_per_cpu_data;	       /* 0xe38 */

	__u32	     paste[16];		       /* 0xe40 */



	__u8	     pad13[0x11b8-0xe80];      /* 0xe80 */