Revision 3af57f78c38131b7a66e2b01e06fdacae01992a3 authored by Heiko Carstens on 17 January 2014, 08:37:15 UTC, committed by David S. Miller on 18 January 2014, 02:54:49 UTC
The s390 bpf jit compiler emits the signed divide instructions "dr" and "d" for unsigned divisions. This can cause problems: the dividend will be zero extended to a 64 bit value and the divisor is the 32 bit signed value as specified A or X accumulator, even though A and X are supposed to be treated as unsigned values. The divide instrunctions will generate an exception if the result cannot be expressed with a 32 bit signed value. This is the case if e.g. the dividend is 0xffffffff and the divisor either 1 or also 0xffffffff (signed: -1). To avoid all these issues simply use unsigned divide instructions. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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| File | Mode | Size |
|---|---|---|
| apparmor | ||
| integrity | ||
| keys | ||
| selinux | ||
| smack | ||
| tomoyo | ||
| yama | ||
| Kconfig | -rw-r--r-- | 5.7 KB |
| Makefile | -rw-r--r-- | 973 bytes |
| capability.c | -rw-r--r-- | 24.4 KB |
| commoncap.c | -rw-r--r-- | 28.1 KB |
| device_cgroup.c | -rw-r--r-- | 17.6 KB |
| inode.c | -rw-r--r-- | 6.7 KB |
| lsm_audit.c | -rw-r--r-- | 9.4 KB |
| min_addr.c | -rw-r--r-- | 1.3 KB |
| security.c | -rw-r--r-- | 35.6 KB |
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