mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 19:29:37 +00:00
xfs: fix freeing of inodes not yet added to the inode cache
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>
This commit is contained in:
parent
2e00c97e2c
commit
b36ec0428a
2 changed files with 68 additions and 74 deletions
|
@ -116,6 +116,71 @@ 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
|
||||
*/
|
||||
|
@ -292,7 +357,8 @@ xfs_iget_cache_miss(
|
|||
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;
|
||||
}
|
||||
|
||||
|
@ -497,62 +563,7 @@ xfs_ireclaim(
|
|||
xfs_qm_dqdetach(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);
|
||||
}
|
||||
|
||||
/*
|
||||
|
|
|
@ -309,23 +309,6 @@ static inline struct inode *VFS_I(struct xfs_inode *ip)
|
|||
return &ip->i_vnode;
|
||||
}
|
||||
|
||||
/*
|
||||
* 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
|
||||
*/
|
||||
|
|
Loading…
Reference in a new issue