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[PATCH] s390: fix strnlen_user return value

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strnlen_user is supposed to return then length count + 1 if no terminating \0
is found, and it should return 0 on exception.  Found by David Howells
<dhowells@redhat.com>.

Signed-off-by: Gerald Schaefer <geraldsc@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Acked-By: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Gerald Schaefer 2006-03-07 21:55:37 -08:00 committed by Linus Torvalds
parent e96fb230cc
commit 331c465914
2 changed files with 6 additions and 6 deletions
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6
arch/s390/lib/uaccess.S
View file

@ -198,12 +198,12 @@ __strnlen_user_asm:
0: srst %r2,%r1
jo 0b
sacf 0
jh 1f # \0 found in string ?
ahi %r2,1 # strnlen_user result includes the \0
1: slr %r2,%r3
# or return count+1 if \0 not found
slr %r2,%r3
br %r14
2: sacf 0
lhi %r2,-EFAULT
slr %r2,%r2 # return 0 on exception
br %r14
.section __ex_table,"a"
.long 0b,2b

6
arch/s390/lib/uaccess64.S
View file

@ -194,12 +194,12 @@ __strnlen_user_asm:
0: srst %r2,%r1
jo 0b
sacf 0
jh 1f # \0 found in string ?
aghi %r2,1 # strnlen_user result includes the \0
1: slgr %r2,%r3
# or return count+1 if \0 not found
slgr %r2,%r3
br %r14
2: sacf 0
lghi %r2,-EFAULT
slgr %r2,%r2 # return 0 on exception
br %r14
.section __ex_table,"a"
.quad 0b,2b