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authorHeiko Carstens <heiko.carstens@de.ibm.com>2013-02-21 07:30:42 -0500
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2013-02-28 03:37:08 -0500
commitf45655f6a65538237359abce55edab9cfcc6d82f (patch)
treebf392ffe658ae512ed992ff24a3b6f5a32c092f7 /arch/s390/kernel
parentd7b788cd06a3080ebf0b2f5f2e008d4fda2b336e (diff)
s390/uaccess: fix strncpy_from_user/strnlen_user zero maxlen case
If the maximum length specified for the to be accessed string for strncpy_from_user() and strnlen_user() is zero the following incorrect values would be returned or incorrect memory accesses would happen: strnlen_user_std() and strnlen_user_pt() incorrectly return "1" strncpy_from_user_pt() would incorrectly access "dst[maxlen - 1]" strncpy_from_user_mvcos() would incorrectly return "-EFAULT" Fix all these oddities by adding early checks. Reviewed-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel')
0 files changed, 0 insertions, 0 deletions