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-rw-r--r--c_src/libbcachefs.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/c_src/libbcachefs.c b/c_src/libbcachefs.c
index ea5629e4..9553ed9e 100644
--- a/c_src/libbcachefs.c
+++ b/c_src/libbcachefs.c
@@ -352,9 +352,9 @@ void bch2_super_write(int fd, struct bch_sb *sb)
if (sb->offset == BCH_SB_SECTOR) {
/* Write backup layout */
- BUG_ON(bs > 4096);
+ unsigned buflen = max(bs, 4096);
- char *buf = aligned_alloc(bs, bs);
+ char *buf = aligned_alloc(buflen, buflen);
xpread(fd, buf, bs, 4096 - bs);
memcpy(buf + bs - sizeof(sb->layout),
&sb->layout,