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[PULL,26/26] migration: fix coverity migrate_mode finding

Message ID 20240104043213.431566-27-peterx@redhat.com
State New
Headers show
Series [PULL,01/26] MAINTAINERS: Leaving Migration | expand

Commit Message

Peter Xu Jan. 4, 2024, 4:32 a.m. UTC 
From: Steve Sistare <steven.sistare@oracle.com>

Coverity diagnoses a possible out-of-range array index here ...

    static GSList *migration_blockers[MIG_MODE__MAX];

    fill_source_migration_info() {
        GSList *cur_blocker = migration_blockers[migrate_mode()];

... because it does not know that MIG_MODE__MAX will never be returned as
a migration mode.  To fix, assert so in migrate_mode().

Fixes: fa3673e497a1 ("migration: per-mode blockers")

Reported-by: Peter Maydell <peter.maydell@linaro.org>
Suggested-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
Reviewed-by: Fabiano Rosas <farosas@suse.de>
Link: https://lore.kernel.org/r/1699907025-215450-1-git-send-email-steven.sistare@oracle.com
Signed-off-by: Peter Xu <peterx@redhat.com>
---
 migration/options.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
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Patch

diff --git a/migration/options.c b/migration/options.c
index 8d8ec73ad9..3e3e0b93b4 100644
--- a/migration/options.c
+++ b/migration/options.c
@@ -833,8 +833,10 @@  uint64_t migrate_max_postcopy_bandwidth(void)
 MigMode migrate_mode(void)
 {
     MigrationState *s = migrate_get_current();
+    MigMode mode = s->parameters.mode;
 
-    return s->parameters.mode;
+    assert(mode >= 0 && mode < MIG_MODE__MAX);
+    return mode;
 }
 
 int migrate_multifd_channels(void)