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e755f78086
linux/fs/btrfs
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Anand Jain e755f78086 btrfs: fix null pointer dereference in clone_fs_devices when name is null 
when one of the device path is missing btrfs_device name is null. So this
patch will check for that.

stack:
BUG: unable to handle kernel NULL pointer dereference at 0000000000000010
IP: [<ffffffff812e18c0>] strlen+0x0/0x30
[<ffffffffa01cd92a>] ? clone_fs_devices+0xaa/0x160 [btrfs]
[<ffffffffa01cdcf7>] btrfs_init_new_device+0x317/0xca0 [btrfs]
[<ffffffff81155bca>] ? __kmalloc_track_caller+0x15a/0x1a0
[<ffffffffa01d6473>] btrfs_ioctl+0xaa3/0x2860 [btrfs]
[<ffffffff81132a6c>] ? handle_mm_fault+0x48c/0x9c0
[<ffffffff81192a61>] ? __blkdev_put+0x171/0x180
[<ffffffff817a784c>] ? __do_page_fault+0x4ac/0x590
[<ffffffff81193426>] ? blkdev_put+0x106/0x110
[<ffffffff81179175>] ? mntput+0x35/0x40
[<ffffffff8116d4b0>] do_vfs_ioctl+0x460/0x4a0
[<ffffffff8115c72e>] ? ____fput+0xe/0x10
[<ffffffff81068033>] ? task_work_run+0xb3/0xd0
[<ffffffff8116d547>] SyS_ioctl+0x57/0x90
[<ffffffff817a793e>] ? do_page_fault+0xe/0x10
[<ffffffff817abe52>] system_call_fastpath+0x16/0x1b

reproducer:
mkfs.btrfs -draid1 -mraid1 /dev/sdg1 /dev/sdg2
btrfstune -S 1 /dev/sdg1
modprobe -r btrfs && modprobe btrfs
mount -o degraded /dev/sdg1 /btrfs
btrfs dev add /dev/sdg3 /btrfs

Signed-off-by: Anand Jain <Anand.Jain@oracle.com>
Signed-off-by: Chris Mason <clm@fb.com>
2014-07-03 07:04:07 -07:00
..
tests Btrfs: fix qgroups sanity test crash or hang 2014-06-13 09:52:24 -07:00
acl.c btrfs: remove useless ACL check 2014-06-09 17:20:42 -07:00
async-thread.c btrfs: fix crash in remount(thread_pool=) case 2014-04-07 10:41:52 -07:00
async-thread.h btrfs: Add trace for btrfs_workqueue alloc/destroy 2014-03-20 17:15:28 -07:00
backref.c Btrfs: fix scrub_print_warning to handle skinny metadata extents 2014-06-09 17:21:17 -07:00
backref.h Btrfs: fix scrub_print_warning to handle skinny metadata extents 2014-06-09 17:21:17 -07:00
btrfs_inode.h btrfs: Drop EXTENT_UPTODATE check in hole punching and direct locking 2014-06-09 17:20:57 -07:00
check-integrity.c btrfs: check_int: propagate out-of-memory error upwards 2014-06-09 17:20:21 -07:00
check-integrity.h block: submit_bio_wait() conversions 2013-11-24 16:33:41 -07:00
compression.c btrfs compression: reuse recently used workspace 2014-06-28 13:48:46 -07:00
compression.h btrfs: make static code static & remove dead code 2013-05-06 15:55:23 -04:00
ctree.c Btrfs: fix leaf corruption after __btrfs_drop_extents 2014-06-09 17:21:10 -07:00
ctree.h Btrfs: fix broken free space cache after the system crashed 2014-06-19 14:20:54 -07:00
delayed-inode.c btrfs: free delayed node outside of root->inode_lock 2014-06-09 17:21:08 -07:00
delayed-inode.h Btrfs: introduce the delayed inode ref deletion for the single link inode 2014-01-28 13:20:09 -08:00
delayed-ref.c Btrfs: rework qgroup accounting 2014-06-09 17:20:48 -07:00
delayed-ref.h Btrfs: rework qgroup accounting 2014-06-09 17:20:48 -07:00
dev-replace.c btrfs: dev replace should replace the sysfs entry 2014-06-28 13:48:44 -07:00
dev-replace.h Btrfs: add new sources for device replace code 2012-12-12 17:15:41 -05:00
dir-item.c Btrfs: convert printk to btrfs_ and fix BTRFS prefix 2014-01-28 13:20:05 -08:00
disk-io.c Btrfs: fix race between balance recovery and root deletion 2014-07-03 07:04:04 -07:00
disk-io.h Btrfs: add sanity tests for new qgroup accounting code 2014-06-09 17:20:49 -07:00
export.c btrfs: remove fs/btrfs/compat.h 2013-11-11 22:03:19 -05:00
export.h
extent_io.c btrfs: fix use of uninit "ret" in end_extent_writepage() 2014-06-13 09:52:28 -07:00
extent_io.h Btrfs: remove unused wait queue in struct extent_buffer 2014-06-19 14:20:28 -07:00
extent_map.c Btrfs: fix NULL pointer crash when running balance and scrub concurrently 2014-06-19 14:20:55 -07:00
extent_map.h Btrfs: fix NULL pointer crash when running balance and scrub concurrently 2014-06-19 14:20:55 -07:00
extent-tree.c Btrfs: fix broken free space cache after the system crashed 2014-06-19 14:20:54 -07:00
file-item.c Btrfs: make fsync work after cloning into a file 2014-06-09 17:21:16 -07:00
file.c Btrfs: fix transaction leak during fsync call 2014-06-09 17:21:06 -07:00
free-space-cache.c Btrfs: fix broken free space cache after the system crashed 2014-06-19 14:20:54 -07:00
free-space-cache.h Btrfs: remove path arg from btrfs_truncate_free_space_cache 2013-11-11 21:51:33 -05:00
hash.c Btrfs: fix btrfs boot when compiled as built-in 2014-01-28 13:20:31 -08:00
hash.h Btrfs: fix btrfs boot when compiled as built-in 2014-01-28 13:20:31 -08:00
inode-item.c btrfs: cleanup: removed unused 'btrfs_get_inode_ref_index' 2014-01-28 13:19:39 -08:00
inode-map.c btrfs: remove newline from inode cache kthread name 2014-06-09 17:20:53 -07:00
inode-map.h
inode.c Btrfs: fix broken free space cache after the system crashed 2014-06-19 14:20:54 -07:00
ioctl.c Btrfs: atomically set inode->i_flags in btrfs_update_iflags 2014-07-03 07:03:23 -07:00
Kconfig Btrfs: fix btrfs boot when compiled as built-in 2014-01-28 13:20:31 -08:00
locking.c Btrfs: fix deadlocks with trylock on tree nodes 2014-06-19 14:19:55 -07:00
locking.h Btrfs: remove btrfs_try_spin_lock 2013-03-14 14:57:10 -04:00
lzo.c btrfs: return errno instead of -1 from compression 2014-06-09 17:20:21 -07:00
Makefile Btrfs: add sanity tests for new qgroup accounting code 2014-06-09 17:20:49 -07:00
math.h Btrfs: cleanup duplicated division functions 2012-12-11 13:31:30 -05:00
ordered-data.c btrfs: remove stale newlines from log messages 2014-06-09 17:20:53 -07:00
ordered-data.h btrfs: Cleanup the "_struct" suffix in btrfs_workequeue 2014-03-10 15:17:16 -04:00
orphan.c btrfs: expand btrfs_find_item() to include find_orphan_item functionality 2014-01-28 13:19:37 -08:00
print-tree.c Btrfs: don't use ram_bytes for uncompressed inline items 2014-01-29 07:06:29 -08:00
print-tree.h btrfs: make static code static & remove dead code 2013-05-06 15:55:23 -04:00
props.c Btrfs: add support for inode properties 2014-01-28 13:20:24 -08:00
props.h Btrfs: add support for inode properties 2014-01-28 13:20:24 -08:00
qgroup.c btrfs: free ulist in qgroup_shared_accounting() error path 2014-06-13 09:52:26 -07:00
qgroup.h Btrfs: rework qgroup accounting 2014-06-09 17:20:48 -07:00
raid56.c Btrfs: fix crash when mounting raid5 btrfs with missing disks 2014-06-28 13:48:45 -07:00
raid56.h Btrfs: RAID5 and RAID6 2013-02-01 14:24:23 -05:00
rcu-string.h Btrfs: use rcu to protect device->name 2012-06-14 21:29:16 -04:00
reada.c Btrfs: fix unfinished readahead thread for raid5/6 degraded mounting 2014-06-13 09:52:21 -07:00
relocation.c btrfs: remove stale newlines from log messages 2014-06-09 17:20:53 -07:00
root-tree.c Btrfs: use bitfield instead of integer data type for the some variants in btrfs_root 2014-06-09 17:20:40 -07:00
scrub.c btrfs: Skip scrubbing removed chunks to avoid -ENOENT. 2014-06-19 14:20:54 -07:00
send.c Btrfs: send, use the right limits for xattr names and values 2014-06-09 17:21:00 -07:00
send.h btrfs: make static code static & remove dead code 2013-05-06 15:55:23 -04:00
struct-funcs.c Btrfs: rewrite BTRFS_SETGET_FUNCS 2012-07-23 16:28:06 -04:00
super.c btrfs: fix nossd and ssd_spread mount option regression 2014-07-03 07:04:06 -07:00
sysfs.c btrfs: dev add should add its sysfs entry 2014-06-28 13:48:43 -07:00
sysfs.h btrfs: dev add should add its sysfs entry 2014-06-28 13:48:43 -07:00
transaction.c Btrfs: assert send doesn't attempt to start transactions 2014-06-28 13:48:46 -07:00
transaction.h Btrfs: add sanity tests for new qgroup accounting code 2014-06-09 17:20:49 -07:00
tree-defrag.c Btrfs: use bitfield instead of integer data type for the some variants in btrfs_root 2014-06-09 17:20:40 -07:00
tree-log.c Btrfs: use helpers for last_trans_log_full_commit instead of opencode 2014-06-09 17:20:45 -07:00
tree-log.h Btrfs: use helpers for last_trans_log_full_commit instead of opencode 2014-06-09 17:20:45 -07:00
ulist.c Btrfs: do not export ulist functions 2014-01-29 07:06:27 -08:00
ulist.h Btrfs: do not export ulist functions 2014-01-29 07:06:27 -08:00
uuid-tree.c Btrfs: convert printk to btrfs_ and fix BTRFS prefix 2014-01-28 13:20:05 -08:00
volumes.c btrfs: fix null pointer dereference in clone_fs_devices when name is null 2014-07-03 07:04:07 -07:00
volumes.h Btrfs: fix deadlock when mounting a degraded fs 2014-06-19 14:20:56 -07:00
xattr.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs 2014-01-30 20:08:20 -08:00
xattr.h btrfs: use generic posix ACL infrastructure 2014-01-25 23:58:18 -05:00
zlib.c btrfs: return errno instead of -1 from compression 2014-06-09 17:20:21 -07:00