diff options
| author | Minchan Kim <[email protected]> | 2020-10-10 23:16:37 -0700 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2020-10-11 10:31:10 -0700 |
| commit | 8b7b2eb131d3476062ffd34358785b44be25172f (patch) | |
| tree | 0493b45139ad6b1dd8e4714987d6c9a047c7d37b | |
| parent | bc4fe4cdd602b3bee5eeb49d843bd6b3296cfc86 (diff) | |
mm: validate inode in mapping_set_error()
The swap address_space doesn't have host. Thus, it makes kernel crash once
swap write meets error. Fix it.
Fixes: 735e4ae5ba28 ("vfs: track per-sb writeback errors and report them to syncfs")
Signed-off-by: Minchan Kim <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Acked-by: Jeff Layton <[email protected]>
Cc: Jan Kara <[email protected]>
Cc: Andres Freund <[email protected]>
Cc: Matthew Wilcox <[email protected]>
Cc: Al Viro <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Cc: Dave Chinner <[email protected]>
Cc: David Howells <[email protected]>
Cc: <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Linus Torvalds <[email protected]>
| -rw-r--r-- | include/linux/pagemap.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h index 7de11dcd534d..434c9c34aeb6 100644 --- a/include/linux/pagemap.h +++ b/include/linux/pagemap.h @@ -54,7 +54,8 @@ 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) |