| Message ID | 20201011033627.VInQu4bdg%akpm@linux-foundation.org |
|---|---|
| State | New |
| Headers | show |
| Series | + mm-validate-inode-in-mapping_set_error.patch added to -mm tree | expand |
--- a/include/linux/pagemap.h~mm-validate-inode-in-mapping_set_error +++ a/include/linux/pagemap.h @@ -54,7 +54,8 @@ static inline void mapping_set_error(str __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)
The patch titled Subject: mm: validate inode in mapping_set_error() has been added to the -mm tree. Its filename is mm-validate-inode-in-mapping_set_error.patch This patch should soon appear at https://ozlabs.org/~akpm/mmots/broken-out/mm-validate-inode-in-mapping_set_error.patch and later at https://ozlabs.org/~akpm/mmotm/broken-out/mm-validate-inode-in-mapping_set_error.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next and is updated there every 3-4 working days ------------------------------------------------------ From: Minchan Kim <minchan@kernel.org> Subject: 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. Link: https://lkml.kernel.org/r/20201010000650.750063-1-minchan@kernel.org Fixes: 735e4ae5ba28 ("vfs: track per-sb writeback errors and report them to syncfs") Signed-off-by: Minchan Kim <minchan@kernel.org> Acked-by: Jeff Layton <jlayton@kernel.org> Cc: Jan Kara <jack@suse.cz> Cc: Andres Freund <andres@anarazel.de> Cc: Matthew Wilcox <willy@infradead.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Christoph Hellwig <hch@infradead.org> Cc: Dave Chinner <david@fromorbit.com> Cc: David Howells <dhowells@redhat.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> --- include/linux/pagemap.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)