* [patch 51/71] vfs: fix inode_init_always calling convention
[not found] ` <20090905001824.GA18171@kroah.com>
@ 2009-09-05 0:14 ` Greg KH
2009-09-05 0:14 ` [patch 52/71] vfs: add __destroy_inode Greg KH
` (2 subsequent siblings)
3 siblings, 0 replies; 4+ messages in thread
From: Greg KH @ 2009-09-05 0:14 UTC (permalink / raw)
To: linux-kernel, stable
Cc: stable-review, akpm, xfs, torvalds, Christoph Hellwig, alan
[-- Attachment #1: vfs-fix-inode_init_always-calling-convention.patch --]
[-- Type: text/plain, Size: 4896 bytes --]
2.6.30-stable review patch. If anyone has any objections, please let us know.
------------------
From: Christoph Hellwig <hch@infradead.org>
backport of upstream commit 54e346215e4fe2ca8c94c54e546cc61902060510
Currently inode_init_always calls into ->destroy_inode if the additional
initialization fails. That's not only counter-intuitive because
inode_init_always did not allocate the inode structure, but in case of
XFS it's actively harmful as ->destroy_inode might delete the inode from
a radix-tree that has never been added. This in turn might end up
deleting the inode for the same inum that has been instanciated by
another process and cause lots of cause subtile problems.
Also in the case of re-initializing a reclaimable inode in XFS it would
free an inode we still want to keep alive.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Eric Sandeen <sandeen@sandeen.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
fs/inode.c | 30 +++++++++++++++++-------------
fs/xfs/xfs_iget.c | 17 +++++------------
include/linux/fs.h | 2 +-
3 files changed, 23 insertions(+), 26 deletions(-)
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -118,12 +118,11 @@ static void wake_up_inode(struct inode *
* These are initializations that need to be done on every inode
* allocation as the fields are not initialised by slab allocation.
*/
-struct inode *inode_init_always(struct super_block *sb, struct inode *inode)
+int inode_init_always(struct super_block *sb, struct inode *inode)
{
static const struct address_space_operations empty_aops;
static struct inode_operations empty_iops;
static const struct file_operations empty_fops;
-
struct address_space *const mapping = &inode->i_data;
inode->i_sb = sb;
@@ -150,7 +149,7 @@ struct inode *inode_init_always(struct s
inode->dirtied_when = 0;
if (security_inode_alloc(inode))
- goto out_free_inode;
+ goto out;
/* allocate and initialize an i_integrity */
if (ima_inode_alloc(inode))
@@ -189,16 +188,12 @@ struct inode *inode_init_always(struct s
inode->i_private = NULL;
inode->i_mapping = mapping;
- return inode;
+ return 0;
out_free_security:
security_inode_free(inode);
-out_free_inode:
- if (inode->i_sb->s_op->destroy_inode)
- inode->i_sb->s_op->destroy_inode(inode);
- else
- kmem_cache_free(inode_cachep, (inode));
- return NULL;
+out:
+ return -ENOMEM;
}
EXPORT_SYMBOL(inode_init_always);
@@ -211,9 +206,18 @@ static struct inode *alloc_inode(struct
else
inode = kmem_cache_alloc(inode_cachep, GFP_KERNEL);
- if (inode)
- return inode_init_always(sb, inode);
- return NULL;
+ if (!inode)
+ return NULL;
+
+ if (unlikely(inode_init_always(sb, inode))) {
+ if (inode->i_sb->s_op->destroy_inode)
+ inode->i_sb->s_op->destroy_inode(inode);
+ else
+ kmem_cache_free(inode_cachep, inode);
+ return NULL;
+ }
+
+ return inode;
}
void destroy_inode(struct inode *inode)
--- a/fs/xfs/xfs_iget.c
+++ b/fs/xfs/xfs_iget.c
@@ -63,6 +63,10 @@ xfs_inode_alloc(
ip = kmem_zone_alloc(xfs_inode_zone, KM_SLEEP);
if (!ip)
return NULL;
+ if (inode_init_always(mp->m_super, VFS_I(ip))) {
+ kmem_zone_free(xfs_inode_zone, ip);
+ return NULL;
+ }
ASSERT(atomic_read(&ip->i_iocount) == 0);
ASSERT(atomic_read(&ip->i_pincount) == 0);
@@ -104,17 +108,6 @@ xfs_inode_alloc(
#ifdef XFS_DIR2_TRACE
ip->i_dir_trace = ktrace_alloc(XFS_DIR2_KTRACE_SIZE, KM_NOFS);
#endif
- /*
- * Now initialise the VFS inode. We do this after the xfs_inode
- * initialisation as internal failures will result in ->destroy_inode
- * being called and that will pass down through the reclaim path and
- * free the XFS inode. This path requires the XFS inode to already be
- * initialised. Hence if this call fails, the xfs_inode has already
- * been freed and we should not reference it at all in the error
- * handling.
- */
- if (!inode_init_always(mp->m_super, VFS_I(ip)))
- return NULL;
/* prevent anyone from using this yet */
VFS_I(ip)->i_state = I_NEW|I_LOCK;
@@ -166,7 +159,7 @@ xfs_iget_cache_hit(
* errors cleanly, then tag it so it can be set up correctly
* later.
*/
- if (!inode_init_always(mp->m_super, VFS_I(ip))) {
+ if (inode_init_always(mp->m_super, VFS_I(ip))) {
error = ENOMEM;
goto out_error;
}
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2135,7 +2135,7 @@ extern loff_t default_llseek(struct file
extern loff_t vfs_llseek(struct file *file, loff_t offset, int origin);
-extern struct inode * inode_init_always(struct super_block *, struct inode *);
+extern int inode_init_always(struct super_block *, struct inode *);
extern void inode_init_once(struct inode *);
extern void inode_add_to_lists(struct super_block *, struct inode *);
extern void iput(struct inode *);
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^ permalink raw reply [flat|nested] 4+ messages in thread* [patch 52/71] vfs: add __destroy_inode
[not found] ` <20090905001824.GA18171@kroah.com>
2009-09-05 0:14 ` [patch 51/71] vfs: fix inode_init_always calling convention Greg KH
@ 2009-09-05 0:14 ` Greg KH
2009-09-05 0:14 ` [patch 53/71] xfs: fix freeing of inodes not yet added to the inode cache Greg KH
2009-09-05 0:14 ` [patch 54/71] xfs: fix spin_is_locked assert on uni-processor builds Greg KH
3 siblings, 0 replies; 4+ messages in thread
From: Greg KH @ 2009-09-05 0:14 UTC (permalink / raw)
To: linux-kernel, stable
Cc: stable-review, akpm, xfs, torvalds, Christoph Hellwig, alan
[-- Attachment #1: vfs-add-__destroy_inode.patch --]
[-- Type: text/plain, Size: 2093 bytes --]
2.6.30-stable review patch. If anyone has any objections, please let us know.
------------------
From: Christoph Hellwig <hch@infradead.org>
backport of upstream commit 2e00c97e2c1d2ffc9e26252ca26b237678b0b772
When we want to tear down an inode that lost the add to the cache race
in XFS we must not call into ->destroy_inode because that would delete
the inode that won the race from the inode cache radix tree.
This patch provides the __destroy_inode helper needed to fix this,
the actual fix will be in th next patch. As XFS was the only reason
destroy_inode was exported we shift the export to the new __destroy_inode.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Eric Sandeen <sandeen@sandeen.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
fs/inode.c | 10 +++++++---
include/linux/fs.h | 1 +
2 files changed, 8 insertions(+), 3 deletions(-)
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -220,18 +220,22 @@ static struct inode *alloc_inode(struct
return inode;
}
-void destroy_inode(struct inode *inode)
+void __destroy_inode(struct inode *inode)
{
BUG_ON(inode_has_buffers(inode));
ima_inode_free(inode);
security_inode_free(inode);
+}
+EXPORT_SYMBOL(__destroy_inode);
+
+void destroy_inode(struct inode *inode)
+{
+ __destroy_inode(inode);
if (inode->i_sb->s_op->destroy_inode)
inode->i_sb->s_op->destroy_inode(inode);
else
kmem_cache_free(inode_cachep, (inode));
}
-EXPORT_SYMBOL(destroy_inode);
-
/*
* These are initializations that only need to be done
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2162,6 +2162,7 @@ extern void __iget(struct inode * inode)
extern void iget_failed(struct inode *);
extern void clear_inode(struct inode *);
extern void destroy_inode(struct inode *);
+extern void __destroy_inode(struct inode *);
extern struct inode *new_inode(struct super_block *);
extern int should_remove_suid(struct dentry *);
extern int file_remove_suid(struct file *);
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^ permalink raw reply [flat|nested] 4+ messages in thread* [patch 53/71] xfs: fix freeing of inodes not yet added to the inode cache
[not found] ` <20090905001824.GA18171@kroah.com>
2009-09-05 0:14 ` [patch 51/71] vfs: fix inode_init_always calling convention Greg KH
2009-09-05 0:14 ` [patch 52/71] vfs: add __destroy_inode Greg KH
@ 2009-09-05 0:14 ` Greg KH
2009-09-05 0:14 ` [patch 54/71] xfs: fix spin_is_locked assert on uni-processor builds Greg KH
3 siblings, 0 replies; 4+ messages in thread
From: Greg KH @ 2009-09-05 0:14 UTC (permalink / raw)
To: linux-kernel, stable
Cc: stable-review, akpm, xfs, torvalds, Christoph Hellwig, alan
[-- Attachment #1: xfs-fix-freeing-of-inodes-not-yet-added-to-the-inode-cache.patch --]
[-- Type: text/plain, Size: 6244 bytes --]
2.6.30-stable review patch. If anyone has any objections, please let us know.
------------------
From: Christoph Hellwig <hch@infradead.org>
upstream commit b36ec0428a06fcbdb67d61e9e664154e5dd9a8c7
When freeing an inode that lost race getting added to the inode cache we
must not call into ->destroy_inode, because that would delete the inode
that won the race from the inode cache radix tree.
This patch uses splits a new xfs_inode_free helper out of xfs_ireclaim
and uses that plus __destroy_inode to make sure we really only free
the memory allocted for the inode that lost the race, and not mess with
the inode cache state.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Eric Sandeen <sandeen@sandeen.net>
Reported-by: Alex Samad <alex@samad.com.au>
Reported-by: Andrew Randrianasulu <randrik@mail.ru>
Reported-by: Stephane <sharnois@max-t.com>
Reported-by: Tommy <tommy@news-service.com>
Reported-by: Miah Gregory <mace@darksilence.net>
Reported-by: Gabriel Barazer <gabriel@oxeva.fr>
Reported-by: Leandro Lucarella <llucax@gmail.com>
Reported-by: Daniel Burr <dburr@fami.com.au>
Reported-by: Nickolay <newmail@spaces.ru>
Reported-by: Michael Guntsche <mike@it-loops.com>
Reported-by: Dan Carley <dan.carley+linuxkern-bugs@gmail.com>
Reported-by: Michael Ole Olsen <gnu@gmx.net>
Reported-by: Michael Weissenbacher <mw@dermichi.com>
Reported-by: Martin Spott <Martin.Spott@mgras.net>
Reported-by: Christian Kujau <lists@nerdbynature.de>
Tested-by: Michael Guntsche <mike@it-loops.com>
Tested-by: Dan Carley <dan.carley+linuxkern-bugs@gmail.com>
Tested-by: Christian Kujau <lists@nerdbynature.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
fs/xfs/xfs_iget.c | 125 ++++++++++++++++++++++++++++-------------------------
fs/xfs/xfs_inode.h | 17 -------
2 files changed, 68 insertions(+), 74 deletions(-)
--- a/fs/xfs/xfs_iget.c
+++ b/fs/xfs/xfs_iget.c
@@ -115,6 +115,71 @@ xfs_inode_alloc(
return ip;
}
+STATIC void
+xfs_inode_free(
+ struct xfs_inode *ip)
+{
+ switch (ip->i_d.di_mode & S_IFMT) {
+ case S_IFREG:
+ case S_IFDIR:
+ case S_IFLNK:
+ xfs_idestroy_fork(ip, XFS_DATA_FORK);
+ break;
+ }
+
+ if (ip->i_afp)
+ xfs_idestroy_fork(ip, XFS_ATTR_FORK);
+
+#ifdef XFS_INODE_TRACE
+ ktrace_free(ip->i_trace);
+#endif
+#ifdef XFS_BMAP_TRACE
+ ktrace_free(ip->i_xtrace);
+#endif
+#ifdef XFS_BTREE_TRACE
+ ktrace_free(ip->i_btrace);
+#endif
+#ifdef XFS_RW_TRACE
+ ktrace_free(ip->i_rwtrace);
+#endif
+#ifdef XFS_ILOCK_TRACE
+ ktrace_free(ip->i_lock_trace);
+#endif
+#ifdef XFS_DIR2_TRACE
+ ktrace_free(ip->i_dir_trace);
+#endif
+
+ if (ip->i_itemp) {
+ /*
+ * Only if we are shutting down the fs will we see an
+ * inode still in the AIL. If it is there, we should remove
+ * it to prevent a use-after-free from occurring.
+ */
+ xfs_log_item_t *lip = &ip->i_itemp->ili_item;
+ struct xfs_ail *ailp = lip->li_ailp;
+
+ ASSERT(((lip->li_flags & XFS_LI_IN_AIL) == 0) ||
+ XFS_FORCED_SHUTDOWN(ip->i_mount));
+ if (lip->li_flags & XFS_LI_IN_AIL) {
+ spin_lock(&ailp->xa_lock);
+ if (lip->li_flags & XFS_LI_IN_AIL)
+ xfs_trans_ail_delete(ailp, lip);
+ else
+ spin_unlock(&ailp->xa_lock);
+ }
+ xfs_inode_item_destroy(ip);
+ ip->i_itemp = NULL;
+ }
+
+ /* asserts to verify all state is correct here */
+ ASSERT(atomic_read(&ip->i_iocount) == 0);
+ ASSERT(atomic_read(&ip->i_pincount) == 0);
+ ASSERT(!spin_is_locked(&ip->i_flags_lock));
+ ASSERT(completion_done(&ip->i_flush));
+
+ kmem_zone_free(xfs_inode_zone, ip);
+}
+
/*
* Check the validity of the inode we just found it the cache
*/
@@ -291,7 +356,8 @@ out_preload_end:
if (lock_flags)
xfs_iunlock(ip, lock_flags);
out_destroy:
- xfs_destroy_inode(ip);
+ __destroy_inode(VFS_I(ip));
+ xfs_inode_free(ip);
return error;
}
@@ -499,62 +565,7 @@ xfs_ireclaim(
XFS_QM_DQDETACH(ip->i_mount, ip);
xfs_iunlock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL);
- switch (ip->i_d.di_mode & S_IFMT) {
- case S_IFREG:
- case S_IFDIR:
- case S_IFLNK:
- xfs_idestroy_fork(ip, XFS_DATA_FORK);
- break;
- }
-
- if (ip->i_afp)
- xfs_idestroy_fork(ip, XFS_ATTR_FORK);
-
-#ifdef XFS_INODE_TRACE
- ktrace_free(ip->i_trace);
-#endif
-#ifdef XFS_BMAP_TRACE
- ktrace_free(ip->i_xtrace);
-#endif
-#ifdef XFS_BTREE_TRACE
- ktrace_free(ip->i_btrace);
-#endif
-#ifdef XFS_RW_TRACE
- ktrace_free(ip->i_rwtrace);
-#endif
-#ifdef XFS_ILOCK_TRACE
- ktrace_free(ip->i_lock_trace);
-#endif
-#ifdef XFS_DIR2_TRACE
- ktrace_free(ip->i_dir_trace);
-#endif
- if (ip->i_itemp) {
- /*
- * Only if we are shutting down the fs will we see an
- * inode still in the AIL. If it is there, we should remove
- * it to prevent a use-after-free from occurring.
- */
- xfs_log_item_t *lip = &ip->i_itemp->ili_item;
- struct xfs_ail *ailp = lip->li_ailp;
-
- ASSERT(((lip->li_flags & XFS_LI_IN_AIL) == 0) ||
- XFS_FORCED_SHUTDOWN(ip->i_mount));
- if (lip->li_flags & XFS_LI_IN_AIL) {
- spin_lock(&ailp->xa_lock);
- if (lip->li_flags & XFS_LI_IN_AIL)
- xfs_trans_ail_delete(ailp, lip);
- else
- spin_unlock(&ailp->xa_lock);
- }
- xfs_inode_item_destroy(ip);
- ip->i_itemp = NULL;
- }
- /* asserts to verify all state is correct here */
- ASSERT(atomic_read(&ip->i_iocount) == 0);
- ASSERT(atomic_read(&ip->i_pincount) == 0);
- ASSERT(!spin_is_locked(&ip->i_flags_lock));
- ASSERT(completion_done(&ip->i_flush));
- kmem_zone_free(xfs_inode_zone, ip);
+ xfs_inode_free(ip);
}
/*
--- a/fs/xfs/xfs_inode.h
+++ b/fs/xfs/xfs_inode.h
@@ -309,23 +309,6 @@ static inline struct inode *VFS_I(struct
}
/*
- * Get rid of a partially initialized inode.
- *
- * We have to go through destroy_inode to make sure allocations
- * from init_inode_always like the security data are undone.
- *
- * We mark the inode bad so that it takes the short cut in
- * the reclaim path instead of going through the flush path
- * which doesn't make sense for an inode that has never seen the
- * light of day.
- */
-static inline void xfs_destroy_inode(struct xfs_inode *ip)
-{
- make_bad_inode(VFS_I(ip));
- return destroy_inode(VFS_I(ip));
-}
-
-/*
* i_flags helper functions
*/
static inline void
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^ permalink raw reply [flat|nested] 4+ messages in thread* [patch 54/71] xfs: fix spin_is_locked assert on uni-processor builds
[not found] ` <20090905001824.GA18171@kroah.com>
` (2 preceding siblings ...)
2009-09-05 0:14 ` [patch 53/71] xfs: fix freeing of inodes not yet added to the inode cache Greg KH
@ 2009-09-05 0:14 ` Greg KH
3 siblings, 0 replies; 4+ messages in thread
From: Greg KH @ 2009-09-05 0:14 UTC (permalink / raw)
To: linux-kernel, stable
Cc: Christoph Hellwig, xfs, akpm, torvalds, stable-review, alan
[-- Attachment #1: xfs-fix-spin_is_locked-assert-on-uni-processor-builds.patch --]
[-- Type: text/plain, Size: 1209 bytes --]
2.6.30-stable review patch. If anyone has any objections, please let us know.
------------------
From: Christoph Hellwig <hch@infradead.org>
upstream commit a8914f3a6d72c97328597a556a99daaf5cc288ae
Without SMP or preemption spin_is_locked always returns false,
so we can't do an assert with it. Instead use assert_spin_locked,
which does the right thing on all builds.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Eric Sandeen <sandeen@sandeen.net>
Reported-by: Johannes Engel <jcnengel@googlemail.com>
Tested-by: Johannes Engel <jcnengel@googlemail.com>
Signed-off-by: Felix Blyakher <felixb@sgi.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
fs/xfs/xfs_log.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/fs/xfs/xfs_log.c
+++ b/fs/xfs/xfs_log.c
@@ -3180,7 +3180,7 @@ try_again:
STATIC void
xlog_state_want_sync(xlog_t *log, xlog_in_core_t *iclog)
{
- ASSERT(spin_is_locked(&log->l_icloglock));
+ assert_spin_locked(&log->l_icloglock);
if (iclog->ic_state == XLOG_STATE_ACTIVE) {
xlog_state_switch_iclogs(log, iclog, 0);
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^ permalink raw reply [flat|nested] 4+ messages in thread