The patch titled Subject: syscalls-x86-add-__nr_kcmp-syscall-v8-comment-update-fix has been removed from the -mm tree. Its filename was syscalls-x86-add-__nr_kcmp-syscall-v8-comment-update-fix.patch This patch was dropped because it was folded into syscalls-x86-add-__nr_kcmp-syscall-v8.patch The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/ ------------------------------------------------------ From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Subject: syscalls-x86-add-__nr_kcmp-syscall-v8-comment-update-fix tweak comment text Cc: "H. Peter Anvin" <hpa@xxxxxxxxx> Cc: Cyrill Gorcunov <gorcunov@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- kernel/kcmp.c | 24 +++++++++++------------- 1 file changed, 11 insertions(+), 13 deletions(-) diff -puN kernel/kcmp.c~syscalls-x86-add-__nr_kcmp-syscall-v8-comment-update-fix kernel/kcmp.c --- a/kernel/kcmp.c~syscalls-x86-add-__nr_kcmp-syscall-v8-comment-update-fix +++ a/kernel/kcmp.c @@ -14,21 +14,19 @@ #include <asm/unistd.h> /* - * We don't expose real in-memory order of objects for security - * reasons, still the comparison results should be suitable for - * sorting. Thus, we obfuscate kernel pointers values and compare - * the production instead. + * We don't expose the real in-memory order of objects for security reasons. + * But still the comparison results should be suitable for sorting. So we + * obfuscate kernel pointers values and compare the production instead. * - * The obfuscation is done in two steps. First -- we use xor on - * kernel pointer with random value, which puts pointer into - * a new position in reordered space. Second -- we multiply - * the xor production with big odd random number to permute - * bits even more (the odd multiplier guarantees that the product - * is unique ever after the high bits are truncated, since any odd - * number is relative prime to 2^n). + * The obfuscation is done in two steps. First we xor the kernel pointer with + * a random value, which puts pointer into a new position in a reordered space. + * Secondly we multiply the xor production with a large odd random number to + * permute its bits even more (the odd multiplier guarantees that the product + * is unique ever after the high bits are truncated, since any odd number is + * relative prime to 2^n). * - * Note also the obfuscation itself is invisible to user-space - * and if needed it can be changed to any suitable scheme. + * Note also that the obfuscation itself is invisible to userspace and if needed + * it can be changed to an alternate scheme. */ static unsigned long cookies[KCMP_TYPES][2] __read_mostly; _ Patches currently in -mm which might be from akpm@xxxxxxxxxxxxxxxxxxxx are origin.patch security-keys-keyctlc-suppress-memory-allocation-failure-warning.patch isdn-add-missing-kern_cont.patch kernel-irq-managec-use-the-pr_foo-infrastructure-to-prefix-printks.patch vsprintf-correctly-handle-width-when-flag-used-in-%p-format.patch vsprintf-further-optimize-decimal-conversion.patch proc-clean-up-proc-pid-environ-handling.patch kernel-cpuc-document-clear_tasks_mm_cpumask.patch ipc-mqueue-improve-performance-of-send-recv.patch ipc-mqueue-correct-mq_attr_ok-test.patch ipc-mqueue-strengthen-checks-on-mqueue-creation.patch tools-selftests-add-mq_perf_tests.patch ipc-mqueue-add-rbtree-node-caching-support.patch pidns-make-killed-children-autoreap.patch fs-nls-add-apple-nls.patch eventfd-change-int-to-__u64-in-eventfd_signal.patch syscalls-x86-add-__nr_kcmp-syscall-v8.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html