Hello Matthew Sakai,
The patch 7d7084389ab3: "dm vdo: add flush support" from Nov 16, 2023
(linux-next), leads to the following Smatch static checker warning:
drivers/md/dm-vdo/flush.c:114 allocate_flush()
error: uninitialized symbol 'flush'.
drivers/md/dm-vdo/flush.c
101 static void *allocate_flush(gfp_t gfp_mask, void *pool_data)
102 {
103 struct vdo_flush *flush;
104
105 if ((gfp_mask & GFP_NOWAIT) == GFP_NOWAIT) {
106 flush = uds_allocate_memory_nowait(sizeof(struct
vdo_flush), __func__);
107 } else {
108 int result = uds_allocate(1, struct vdo_flush,
__func__, &flush);
109
110 if (result != VDO_SUCCESS)
111 uds_log_error_strerror(result, "failed to
allocate spare flush");
In real life, uds_allocate_memory() isn't going to fail here, but
if it did then "flush" isn't initialized...
112 }
113
--> 114 if (flush != NULL) {
115 struct flusher *flusher = pool_data;
116
117 vdo_initialize_completion(&flush->completion,
flusher->vdo,
118 VDO_FLUSH_COMPLETION);
119 }
120
121 return flush;
122 }
regards,
dan carpenter
