The swap address_space doesn't have host. Thus, it makes kernel crash once swap write meets error. Fix it. [1] 735e4ae5ba28, vfs: track per-sb writeback errors and report them to syncfs Signed-off-by: Minchan Kim <minchan@xxxxxxxxxx> --- include/linux/pagemap.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h index 17ba0fe59290..9cf540447e73 100644 --- a/include/linux/pagemap.h +++ b/include/linux/pagemap.h @@ -55,7 +55,8 @@ static inline void mapping_set_error(struct address_space *mapping, int error) __filemap_set_wb_err(mapping, error); /* Record it in superblock */ - errseq_set(&mapping->host->i_sb->s_wb_err, error); + if (mapping->host) + errseq_set(&mapping->host->i_sb->s_wb_err, error); /* Record it in flags for now, for legacy callers */ if (error == -ENOSPC) -- 2.28.0.1011.ga647a8990f-goog
