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s390/cmm: make copy_from_user() invocation provably correct
Get rid of these two warnings: In function 'copy_from_user', inlined from 'cmm_timeout_handler' at arch/s390/mm/cmm.c:310: uaccess.h:303: warning: call to 'copy_from_user_overflow' declared with attribute warning: copy_from_user() buffer size is not provably correct In function 'copy_from_user', inlined from 'cmm_pages_handler' at arch/s390/mm/cmm.c:270: uaccess.h:303: warning: call to 'copy_from_user_overflow' declared with attribute warning: copy_from_user() buffer size is not provably correct Change the "len" type to unsigned int, so we can make sure that there is no buffer overflow. This also generates less code. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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160d378ebc
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1 changed files with 2 additions and 2 deletions
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@ -257,8 +257,8 @@ static int cmm_pages_handler(ctl_table *ctl, int write, void __user *buffer,
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size_t *lenp, loff_t *ppos)
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{
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char buf[16], *p;
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unsigned int len;
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long nr;
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int len;
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if (!*lenp || (*ppos && !write)) {
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*lenp = 0;
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@ -298,7 +298,7 @@ static int cmm_timeout_handler(ctl_table *ctl, int write, void __user *buffer,
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{
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char buf[64], *p;
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long nr, seconds;
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int len;
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unsigned int len;
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if (!*lenp || (*ppos && !write)) {
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*lenp = 0;
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