[f2fs-dev] [Bug 204043] F2fs kernel BUG at fs/f2fs/data.c:317!

[bugzilla-daemon@bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=204043

Chao Yu (chao@kernel.org) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
                 CC|                            |chao@kernel.org

--- Comment #1 from Chao Yu (chao@kernel.org) ---
Could you help to add below diff to check debug info?

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index bc5cea27b512..333285cb14c5 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -241,7 +241,7 @@ static inline void __submit_bio(struct f2fs_sb_info *sbi,
                                struct bio *bio, enum page_type type)
 {
        if (!is_read_io(bio_op(bio))) {
-               unsigned int start;
+               unsigned int start, ofs;

                if (type != DATA && type != NODE)
                        goto submit_io;
@@ -256,7 +256,7 @@ static inline void __submit_bio(struct f2fs_sb_info *sbi,
                        goto submit_io;

                /* fill dummy pages */
-               for (; start < F2FS_IO_SIZE(sbi); start++) {
+               for (ofs = start; ofs < F2FS_IO_SIZE(sbi); ofs++) {
                        struct page *page =
                                mempool_alloc(sbi->write_io_dummy,
                                              GFP_NOIO | __GFP_NOFAIL);
@@ -266,8 +266,16 @@ static inline void __submit_bio(struct f2fs_sb_info *sbi,
                        SetPagePrivate(page);
                        set_page_private(page, (unsigned
long)DUMMY_WRITTEN_PAGE);
                        lock_page(page);
-                       if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE)
-                               f2fs_bug_on(sbi, 1);
+                       if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE)
{
+                               printk("ofs:%u, start:%u, io_size:%u, "
+                                       "size:%u, vcnt:%u, max_vecs:%u",
+                                       ofs, start, F2FS_IO_SIZE(sbi),
+                                       bio->bi_iter.bi_size,
+                                       bio->bi_vcnt,
+                                       bio->bi_max_vecs);
+                               WARN_ON(1);
+                               break;
+                       }
                }
                /*
                 * In the NODE case, we lose next block address chain. So, we

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