On Wed, 14 Aug 2013 16:00:01 -0700, Andrew Morton wrote: > On Wed, 14 Aug 2013 01:51:48 +0900 (JST) Ryusuke Konishi <konishi.ryusuke@xxxxxxxxxxxxx> wrote: > >> On Tue, 13 Aug 2013 17:50:33 +0400, Vyacheslav Dubeyko wrote: >> > From: Vyacheslav Dubeyko <slava@xxxxxxxxxxx> >> > Subject: [PATCH v3 1/2] nilfs2: remove double bio_put() in nilfs_end_bio_write() for BIO_EOPNOTSUPP error >> > >> > This patch removes double call of bio_put() in nilfs_end_bio_write() >> > for the case of BIO_EOPNOTSUPP error detection. The issue was found >> > by Dan Carpenter and he suggests first version of the fix too. >> > >> > Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx> >> > Signed-off-by: Vyacheslav Dubeyko <slava@xxxxxxxxxxx> >> > CC: Ryusuke Konishi <konishi.ryusuke@xxxxxxxxxxxxx> >> >> Acked-by: Ryusuke Konishi <konishi.ryusuke@xxxxxxxxxxxxx> >> Tested-by: Ryusuke Konishi <konishi.ryusuke@xxxxxxxxxxxxx> >> >> I tested this patch by inserting a pseudo EOPNOTSUPP error, and this >> actually fixed a crach "kernel BUG at fs/bio.c:498!" due to reference >> count underflow of bio_put() that nilfs_end_bio_write() induced. >> >> >> Andrew, please pick up this bug-fix preferably for this cycle. > > Should we apply the fix to earlier kernel versions and if so, how > far back in time does it go? Yes, I think it should also be applied to earlier versions. I looked back ealiear versions. This bug, unfortunately, comes from the original version (2.6.30), and the patch could be applied to all versions. Regards, Ryusuke Konishi -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
