From: David Sterba <dsterba@suse.com>
To: stable@vger.kernel.org
Subject: [PATCH 10/21] Btrfs: remove BUG_ON()'s in btrfs_map_block
Date: Fri, 3 Jun 2016 17:42:28 +0200 [thread overview]
Message-ID: <1464968548-6630-1-git-send-email-dsterba@suse.com> (raw)
In-Reply-To: <20160603154006.GP29147@suse.cz>
From: Josef Bacik <jbacik@fb.com>
commit e042d1ec4417981dfe9331e47b76f17929bc2ffe upstream.
btrfs_map_block can go horribly wrong in the face of fs corruption, lets agree
to not be assholes and panic at any possible chance things are all fucked up.
Signed-off-by: Josef Bacik <jbacik@fb.com>
[ removed type casts ]
Signed-off-by: David Sterba <dsterba@suse.com>
---
fs/btrfs/volumes.c | 18 ++++++++++++++++--
1 file changed, 16 insertions(+), 2 deletions(-)
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index f4442fb6b8d4..839c2e9e89ae 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -5289,7 +5289,15 @@ static int __btrfs_map_block(struct btrfs_fs_info *fs_info, int rw,
stripe_nr = div64_u64(stripe_nr, stripe_len);
stripe_offset = stripe_nr * stripe_len;
- BUG_ON(offset < stripe_offset);
+ if (offset < stripe_offset) {
+ btrfs_crit(fs_info, "stripe math has gone wrong, "
+ "stripe_offset=%llu, offset=%llu, start=%llu, "
+ "logical=%llu, stripe_len=%llu",
+ stripe_offset, offset, em->start, logical,
+ stripe_len);
+ free_extent_map(em);
+ return -EINVAL;
+ }
/* stripe_offset is the offset of this block in its stripe*/
stripe_offset = offset - stripe_offset;
@@ -5528,7 +5536,13 @@ static int __btrfs_map_block(struct btrfs_fs_info *fs_info, int rw,
&stripe_index);
mirror_num = stripe_index + 1;
}
- BUG_ON(stripe_index >= map->num_stripes);
+ if (stripe_index >= map->num_stripes) {
+ btrfs_crit(fs_info, "stripe index math went horribly wrong, "
+ "got stripe_index=%u, num_stripes=%u",
+ stripe_index, map->num_stripes);
+ ret = -EINVAL;
+ goto out;
+ }
num_alloc_stripes = num_stripes;
if (dev_replace_is_ongoing) {
--
2.7.1
next prev parent reply other threads:[~2016-06-03 15:43 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-03 15:40 Btrfs stable patches for 4.5.x David Sterba
2016-06-03 15:42 ` [PATCH 01/21] btrfs: bugfix: handle FS_IOC32_{GETFLAGS,SETFLAGS,GETVERSION} in btrfs_ioctl David Sterba
2016-06-03 15:42 ` [PATCH 02/21] Btrfs: do not create empty block group if we have allocated data David Sterba
2016-06-03 15:42 ` [PATCH 03/21] btrfs: allow balancing to dup with multi-device David Sterba
2016-06-03 15:42 ` [PATCH 04/21] btrfs: fix mixed block count of available space David Sterba
2016-06-03 15:42 ` [PATCH 05/21] btrfs: avoid overflowing f_bfree David Sterba
2016-06-03 15:42 ` [PATCH 06/21] btrfs: fix lock dep warning, move scratch dev out of device_list_mutex and uuid_mutex David Sterba
2016-06-03 15:42 ` [PATCH 07/21] btrfs: add read-only check to sysfs handler of features David Sterba
2016-06-03 15:42 ` [PATCH 08/21] btrfs: add check to sysfs handler of label David Sterba
2016-06-03 15:42 ` [PATCH 09/21] Btrfs: fix divide error upon chunk's stripe_len David Sterba
2016-06-03 15:42 ` David Sterba [this message]
2016-06-03 15:42 ` [PATCH 11/21] btrfs: fix lock dep warning move scratch super outside of chunk_mutex David Sterba
2016-06-03 15:42 ` [PATCH 12/21] btrfs: add write protection to SET_FEATURES ioctl David Sterba
2016-06-03 15:42 ` [PATCH 13/21] btrfs: fix int32 overflow in shrink_delalloc() David Sterba
2016-06-03 15:42 ` [PATCH 14/21] Btrfs: fix fspath error deallocation David Sterba
2016-06-03 15:42 ` [PATCH 15/21] btrfs: fix memory leak during RAID 5/6 device replacement David Sterba
2016-06-03 15:42 ` [PATCH 16/21] btrfs: pass the right error code to the btrfs_std_error David Sterba
2016-06-03 15:42 ` [PATCH 17/21] Btrfs: fix for incorrect directory entries after fsync log replay David Sterba
2016-06-03 15:42 ` [PATCH 18/21] Btrfs: fix empty symlink after creating symlink and fsync parent dir David Sterba
2016-06-03 15:42 ` [PATCH 19/21] Btrfs: fix unexpected return value of fiemap David Sterba
2016-06-03 15:42 ` [PATCH 20/21] btrfs: scrub: Set bbio to NULL before calling btrfs_map_block David Sterba
2016-06-03 15:42 ` [PATCH 21/21] btrfs: make state preallocation more speculative in __set_extent_bit David Sterba
2016-06-05 21:48 ` Btrfs stable patches for 4.5.x Greg KH
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