The definition of struct blk_zone_report is as follows:
struct blk_zone_report {
__u64 sector;
__u32 nr_zones;
__u32 flags;
struct blk_zone zones[0];
};
Since f2fs_report_zone() allocates the above data structure with
malloc() and since f2fs_report_zone() only initializes the sector and
nr_zones members, the flags member is not initialized. Modify
f2fs_report_zone() such that 0 is passed as flags to the
BLKREPORTZONE ioctl instead of a random value. This has been
discovered by reading the source code.
Cc: Shin'ichiro Kawasaki <[email protected]>
Fixes: 6d7c7b785feb ("libf2fs_zoned: Introduce f2fs_report_zone() helper
function")
Signed-off-by: Bart Van Assche <[email protected]>
---
lib/libf2fs_zoned.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/lib/libf2fs_zoned.c b/lib/libf2fs_zoned.c
index f383ce275342..d8de66b82029 100644
--- a/lib/libf2fs_zoned.c
+++ b/lib/libf2fs_zoned.c
@@ -206,7 +206,8 @@ int f2fs_report_zone(int i, uint64_t sector, void *blkzone)
struct blk_zone_report *rep;
int ret = -1;
- rep = malloc(sizeof(struct blk_zone_report) + sizeof(struct blk_zone));
+ rep = calloc(1, sizeof(struct blk_zone_report) +
+ sizeof(struct blk_zone));
if (!rep) {
ERR_MSG("No memory for report zones\n");
return -ENOMEM;
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