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s390: remove bogus system call table entries 

The 64 bit system call table contains three entries that come without
a matching NR_<name> entry in unistd.h.  In fact all three of them do
not make sense on 64 bit, but only for compat processes.

llseek and mmap2 were specifically introduced for 32 bit / compat
processes. getrlimit is wired up twice, so that only the entry that
comes with a corresponding NR_getrlimit needs to be kept.

The other entries can be removed, since it seems very unlikely that
this will break user space.

Reported-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Heiko Carstens 2017-12-14 13:28:00 +01:00 committed by Martin Schwidefsky
parent 0a12ed2c21
commit 9797f14404
1 changed files with 3 additions and 3 deletions
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6
arch/s390/kernel/syscalls.S
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@ -85,7 +85,7 @@ SYSCALL(sys_sigsuspend,compat_sys_sigsuspend)
SYSCALL(sys_sigpending,compat_sys_sigpending)
SYSCALL(sys_sethostname,compat_sys_sethostname)
SYSCALL(sys_setrlimit,compat_sys_setrlimit) /* 75 */
SYSCALL(sys_getrlimit,compat_sys_old_getrlimit)
SYSCALL(sys_ni_syscall,compat_sys_old_getrlimit)
SYSCALL(sys_getrusage,compat_sys_getrusage)
SYSCALL(sys_gettimeofday,compat_sys_gettimeofday)
SYSCALL(sys_settimeofday,compat_sys_settimeofday)
@ -149,7 +149,7 @@ SYSCALL(sys_s390_personality,sys_s390_personality)
NI_SYSCALL /* for afs_syscall */
SYSCALL(sys_ni_syscall,compat_sys_s390_setfsuid16) /* old setfsuid16 syscall */
SYSCALL(sys_ni_syscall,compat_sys_s390_setfsgid16) /* old setfsgid16 syscall */
SYSCALL(sys_llseek,compat_sys_llseek) /* 140 */
SYSCALL(sys_ni_syscall,compat_sys_llseek) /* 140 */
SYSCALL(sys_getdents,compat_sys_getdents)
SYSCALL(sys_select,compat_sys_select)
SYSCALL(sys_flock,sys_flock)
@ -201,7 +201,7 @@ NI_SYSCALL /* streams1 */
NI_SYSCALL /* streams2 */
SYSCALL(sys_vfork,sys_vfork) /* 190 */
SYSCALL(sys_getrlimit,compat_sys_getrlimit)
SYSCALL(sys_mmap2,compat_sys_s390_mmap2)
SYSCALL(sys_ni_syscall,compat_sys_s390_mmap2)
SYSCALL(sys_ni_syscall,compat_sys_s390_truncate64)
SYSCALL(sys_ni_syscall,compat_sys_s390_ftruncate64)
SYSCALL(sys_ni_syscall,compat_sys_s390_stat64) /* 195 */