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bcachefs: Initialize journal pad data in bch_replica_entry objects.

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Running the filesystem under valgrind exposed some garbage data being
written to disk in bch2_journal_super_entries_add_common(), in the
portion which encodes bch_replica_entry objects.

Signed-off-by: Justin Husted <sigstop@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Justin Husted 2019-10-08 19:17:06 -07:00 committed by Kent Overstreet
parent f7c0fcdd39
commit bf974f9203
1 changed files with 4 additions and 3 deletions
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7
fs/bcachefs/super-io.c
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@ -1030,9 +1030,10 @@ bch2_journal_super_entries_add_common(struct bch_fs *c,
struct jset_entry_data_usage *u =
container_of(entry, struct jset_entry_data_usage, entry);
memset(u, 0, sizeof(*u));
u->entry.u64s = DIV_ROUND_UP(sizeof(*u) + e->nr_devs,
sizeof(u64)) - 1;
int u64s = DIV_ROUND_UP(sizeof(*u) + e->nr_devs,
sizeof(u64)) - 1;
memset(u, 0, u64s * sizeof(u64));
u->entry.u64s = u64s;
u->entry.type = BCH_JSET_ENTRY_data_usage;
u->v = cpu_to_le64(c->usage_base->replicas[i]);
unsafe_memcpy(&u->r, e, replicas_entry_bytes(e),