4.4-stable review patch. If anyone has any objections, please let me know.
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From: Jaegeuk Kim jaegeuk@kernel.org
[ Upstream commit c13ff37e359bb3eacf4e1760dcea8d9760aa7459 ]
- has_not_enough_free_secs node_secs: 0 dent_secs: 0 freed:0 free_segments:103 reserved:104
- f2fs_gc - get_victim_by_default alloc_mode 0, gc_mode 1, max_search 2672, offset 4654, ofs_unit 1
- do_garbage_collect start_segno 3976, end_segno 3977 type 0
- is_alive nid 22797, blkaddr 2131882, ofs_in_node 0, version 0x8/0x0
- gc_data_segment 766, segno 3976, block 512/426 not alive
So, this patch fixes subtle corrupted case where node version does not match to summary version which results in infinite loop by gc.
Reported-by: Yunlei He heyunlei@huawei.com Signed-off-by: Jaegeuk Kim jaegeuk@kernel.org Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/f2fs/gc.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
--- a/fs/f2fs/gc.c +++ b/fs/f2fs/gc.c @@ -522,8 +522,10 @@ static bool is_alive(struct f2fs_sb_info get_node_info(sbi, nid, dni);
if (sum->version != dni->version) { - f2fs_put_page(node_page, 1); - return false; + f2fs_msg(sbi->sb, KERN_WARNING, + "%s: valid data with mismatched node version.", + __func__); + set_sbi_flag(sbi, SBI_NEED_FSCK); }
*nofs = ofs_of_node(node_page);