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4735fb2828
linux/fs/btrfs
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Jesper Juhl 4735fb2828 Btrfs: Make free_ipath() deal gracefully with NULL pointers 
Make free_ipath() behave like most other freeing functions in the
kernel and gracefully do nothing when passed a NULL pointer.

Besides this making the bahaviour consistent with functions such as
kfree(), vfree(), btrfs_free_path() etc etc, it also fixes a real NULL
deref issue in fs/btrfs/ioctl.c::btrfs_ioctl_ino_to_path(). In that
function we have this code:

...
        ipath = init_ipath(size, root, path);
        if (IS_ERR(ipath)) {
                ret = PTR_ERR(ipath);
                ipath = NULL;
                goto out;
        }
...
out:
        btrfs_free_path(path);
        free_ipath(ipath);
...

If we ever take the true branch of that 'if' statement we'll end up
passing a NULL pointer to free_ipath() which will subsequently
dereference it and we'll go "Boom" :-(
This patch will avoid that.

Signed-off-by: Jesper Juhl <jj@chaosbits.net>
2012-04-18 19:22:20 +02:00
..
acl.c
async-thread.c btrfs: return void in functions without error conditions 2012-03-22 01:45:34 +01:00
async-thread.h btrfs: return void in functions without error conditions 2012-03-22 01:45:34 +01:00
backref.c Btrfs: Make free_ipath() deal gracefully with NULL pointers 2012-04-18 19:22:20 +02:00
backref.h Btrfs: fix regression in scrub path resolving 2012-03-27 14:51:21 +02:00
btrfs_inode.h Btrfs: add a delalloc mutex to inodes for delalloc reservations 2012-01-16 15:29:43 -05:00
check-integrity.c Btrfs: fix compiler warnings on 32 bit systems 2012-02-24 10:39:05 -05:00
check-integrity.h
compat.h
compression.c Btrfs: check return value of bio_alloc() properly 2012-04-12 16:03:56 -04:00
compression.h btrfs: return void in functions without error conditions 2012-03-22 01:45:34 +01:00
ctree.c Merge branch 'error-handling' into for-linus 2012-03-28 20:31:37 -04:00
ctree.h Merge branch 'for-chris' of git://github.com/idryomov/btrfs-unstable into for-linus 2012-03-28 20:32:46 -04:00
delayed-inode.c btrfs: replace many BUG_ONs with proper error handling 2012-03-22 11:52:54 +01:00
delayed-inode.h
delayed-ref.c btrfs: return void in functions without error conditions 2012-03-22 01:45:34 +01:00
delayed-ref.h
dir-item.c btrfs: replace many BUG_ONs with proper error handling 2012-03-22 11:52:54 +01:00
disk-io.c Btrfs: do not mount when we have a sectorsize unequal to PAGE_SIZE 2012-04-18 19:22:13 +02:00
disk-io.h btrfs: enhance transaction abort infrastructure 2012-03-22 01:45:40 +01:00
export.c btrfs: replace many BUG_ONs with proper error handling 2012-03-22 11:52:54 +01:00
export.h
extent_io.c Btrfs: avoid possible use-after-free in clear_extent_bit() 2012-04-18 19:22:18 +02:00
extent_io.h Merge branch 'error-handling' into for-linus 2012-03-28 20:31:37 -04:00
extent_map.c
extent_map.h btrfs: fix structs where bitfields and spinlock/atomic share 8B word 2012-02-15 16:40:25 +01:00
extent-tree.c Btrfs: use commit root when loading free space cache 2012-04-12 20:54:01 -04:00
file-item.c Btrfs: don't use crc items bigger than 4KB 2012-03-28 20:34:10 -04:00
file.c btrfs: replace many BUG_ONs with proper error handling 2012-03-22 11:52:54 +01:00
free-space-cache.c Btrfs: use commit root when loading free space cache 2012-04-12 20:54:01 -04:00
free-space-cache.h
hash.h
inode-item.c Merge branch 'error-handling' into for-linus 2012-03-28 20:31:37 -04:00
inode-map.c Btrfs: show useful info in space reservation tracepoint 2012-03-29 09:57:44 -04:00
inode-map.h
inode.c btrfs: fix race in reada 2012-04-18 19:12:44 +02:00
ioctl.c Btrfs: update to the right index of defragment 2012-03-29 09:57:45 -04:00
ioctl.h Btrfs: add balance progress reporting 2012-01-16 22:04:49 +02:00
Kconfig
locking.c btrfs: return void in functions without error conditions 2012-03-22 01:45:34 +01:00
locking.h btrfs: return void in functions without error conditions 2012-03-22 01:45:34 +01:00
lzo.c
Makefile Merge branch 'integrity-check-patch-v2' of git://btrfs.giantdisaster.de/git/btrfs into integration 2012-01-16 15:27:58 -05:00
ordered-data.c btrfs: return void in functions without error conditions 2012-03-22 01:45:34 +01:00
ordered-data.h btrfs: return void in functions without error conditions 2012-03-22 01:45:34 +01:00
orphan.c btrfs: replace many BUG_ONs with proper error handling 2012-03-22 11:52:54 +01:00
print-tree.c
print-tree.h
reada.c btrfs: don't add both copies of DUP to reada extent tree 2012-04-18 19:12:44 +02:00
relocation.c btrfs: replace many BUG_ONs with proper error handling 2012-03-22 11:52:54 +01:00
root-tree.c btrfs: replace many BUG_ONs with proper error handling 2012-03-22 11:52:54 +01:00
scrub.c Btrfs: check return value of bio_alloc() properly 2012-04-12 16:03:56 -04:00
struct-funcs.c Btrfs: add the ability to cache a pointer into the eb 2012-03-26 17:04:23 -04:00
super.c Merge git://git.jan-o-sch.net/btrfs-unstable into for-linus 2012-03-28 20:33:40 -04:00
sysfs.c
transaction.c btrfs: add missing unlocks to transaction abort paths 2012-04-18 19:22:14 +02:00
transaction.h btrfs: enhance transaction abort infrastructure 2012-03-22 01:45:40 +01:00
tree-defrag.c
tree-log.c btrfs: replace many BUG_ONs with proper error handling 2012-03-22 11:52:54 +01:00
tree-log.h btrfs: return void in functions without error conditions 2012-03-22 01:45:34 +01:00
ulist.c
ulist.h
version.h
volumes.c Btrfs: fix eof while discarding extents 2012-04-12 16:03:56 -04:00
volumes.h btrfs: return void in functions without error conditions 2012-03-22 01:45:34 +01:00
xattr.c Btrfs: do not use btrfs_end_transaction_throttle everywhere 2012-01-16 15:28:54 -05:00
xattr.h
zlib.c