From: Gerald Schaefer <[email protected]>
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 <[email protected]>.
Signed-off-by: Gerald Schaefer <[email protected]>
Signed-off-by: Heiko Carstens <[email protected]>
---
arch/s390/lib/uaccess.S | 6 +++---
arch/s390/lib/uaccess64.S | 6 +++---
2 files changed, 6 insertions(+), 6 deletions(-)
diff -urpN linux-2.6/arch/s390/lib/uaccess64.S linux-2.6-patched/arch/s390/lib/uaccess64.S
--- linux-2.6/arch/s390/lib/uaccess64.S 2006-01-03 04:21:10.000000000 +0100
+++ linux-2.6-patched/arch/s390/lib/uaccess64.S 2006-03-07 07:59:22.000000000 +0100
@@ -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
diff -urpN linux-2.6/arch/s390/lib/uaccess.S linux-2.6-patched/arch/s390/lib/uaccess.S
--- linux-2.6/arch/s390/lib/uaccess.S 2006-01-03 04:21:10.000000000 +0100
+++ linux-2.6-patched/arch/s390/lib/uaccess.S 2006-03-07 07:59:22.000000000 +0100
@@ -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
-
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