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| author | Gabriel de Perthuis <g2p.code@gmail.com> | 2013-09-24 08:17:28 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-09-24 23:41:43 +0200 |
| commit | aee6f1cfff3ce240eb4b43b41ca466b907acbd2e (patch) | |
| tree | 478ae1e04f0f941755b68c472fa7ebfada4dd4a4 /drivers/md | |
| parent | bcache: Fix a dumb journal discard bug (diff) | |
| download | linux-aee6f1cfff3ce240eb4b43b41ca466b907acbd2e.tar.xz linux-aee6f1cfff3ce240eb4b43b41ca466b907acbd2e.zip | |
bcache: Strip endline when writing the label through sysfs
sysfs attributes with unusual characters have crappy failure modes
in Squeeze (udev 164); later versions of udev are unaffected.
This should make these characters more unusual.
Signed-off-by: Gabriel de Perthuis <g2p.code@gmail.com>
Signed-off-by: Kent Overstreet <kmo@daterainc.com>
Cc: linux-stable <stable@vger.kernel.org> # >= v3.10
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/bcache/sysfs.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/md/bcache/sysfs.c b/drivers/md/bcache/sysfs.c index 4fe6ab2fbe2e..924dcfdae111 100644 --- a/drivers/md/bcache/sysfs.c +++ b/drivers/md/bcache/sysfs.c @@ -223,8 +223,13 @@ STORE(__cached_dev) } if (attr == &sysfs_label) { - /* note: endlines are preserved */ - memcpy(dc->sb.label, buf, SB_LABEL_SIZE); + if (size > SB_LABEL_SIZE) + return -EINVAL; + memcpy(dc->sb.label, buf, size); + if (size < SB_LABEL_SIZE) + dc->sb.label[size] = '\0'; + if (size && dc->sb.label[size - 1] == '\n') + dc->sb.label[size - 1] = '\0'; bch_write_bdev_super(dc, NULL); if (dc->disk.c) { memcpy(dc->disk.c->uuids[dc->disk.id].label, |