The patch titled
Subject: ipc: add more comments to message copying related code
has been added to the -mm tree. Its filename is
ipc-add-more-comments-to-message-copying-related-code.patch
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------------------------------------------------------
From: Stanislav Kinsbursky <skinsbursky@xxxxxxxxxxxxx>
Subject: ipc: add more comments to message copying related code
Signed-off-by: Stanislav Kinsbursky <skinsbursky@xxxxxxxxxxxxx>
Cc: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx>
Cc: James Morris <jmorris@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
ipc/msg.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff -puN ipc/msg.c~ipc-add-more-comments-to-message-copying-related-code ipc/msg.c
--- a/ipc/msg.c~ipc-add-more-comments-to-message-copying-related-code
+++ a/ipc/msg.c
@@ -770,6 +770,10 @@ static long do_msg_fill(void __user *des
}
#ifdef CONFIG_CHECKPOINT_RESTORE
+/*
+ * This function creates new kernel message structure, large enough to store
+ * bufsz message bytes.
+ */
static inline struct msg_msg *prepare_copy(void __user *buf, size_t bufsz,
int msgflg, long *msgtyp,
unsigned long *copy_number)
@@ -881,6 +885,10 @@ long do_msgrcv(int msqid, void __user *b
msg = ERR_PTR(-E2BIG);
goto out_unlock;
}
+ /*
+ * If we are copying, then do not unlink message and do
+ * not update queue parameters.
+ */
if (msgflg & MSG_COPY)
goto out_unlock;
list_del(&msg->m_list);
_
Patches currently in -mm which might be from skinsbursky@xxxxxxxxxxxxx are
linux-next.patch
proc-check-vma-vm_file-before-dereferencing.patch
ipc-remove-forced-assignment-of-selected-message.patch
ipc-add-sysctl-to-specify-desired-next-object-id.patch
ipc-add-sysctl-to-specify-desired-next-object-id-checkpatch-fixes.patch
ipc-add-sysctl-to-specify-desired-next-object-id-wrap-new-sysctls-for-criu-inside-config_checkpoint_restore.patch
ipc-add-sysctl-to-specify-desired-next-object-id-documentation-update-sysctl-kerneltxt.patch
ipc-message-queue-receive-cleanup.patch
ipc-message-queue-receive-cleanup-checkpatch-fixes.patch
ipc-message-queue-copy-feature-introduced.patch
ipc-message-queue-copy-feature-introduced-remove-redundant-msg_copy-check.patch
ipc-message-queue-copy-feature-introduced-cleanup-do_msgrcv-aroung-msg_copy-feature.patch
selftests-ipc-message-queue-copy-feature-test.patch
selftests-ipc-message-queue-copy-feature-test-update.patch
ipc-simplify-free_copy-call.patch
ipc-convert-prepare_copy-from-macro-to-function.patch
ipc-convert-prepare_copy-from-macro-to-function-fix.patch
ipc-simplify-message-copying.patch
ipc-add-more-comments-to-message-copying-related-code.patch
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