projects/linux·commit 12e971b6

Merge tag 'xfs-4.15-fixes-10' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux

12e971b6 · Linus Torvalds <[email protected]> · 2018-01-05 12:59:32 -08:00

Pull XFS fixes from Darrick Wong:
 "I have just a few fixes for bugs and resource cleanup problems this
  week:

   - Fix resource cleanup of failed quota initialization

   - Fix integer overflow problems wrt s_maxbytes"

* tag 'xfs-4.15-fixes-10' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
  xfs: fix s_maxbytes overflow problems
  xfs: quota: check result of register_shrinker()
  xfs: quota: fix missed destroy of qi_tree_lock
Commit
12e971b652e3166c3039e09ad2cb5568fc7f040a
Parents
f842839c · b4d8ad7f

Merge commit. Changes below are compared with the first parent: f842839c.

Changes

3 files changed · +33 −19

FileStatusAddDelContent
fs/xfs/xfs_aops.cmodified+2−2View file
fs/xfs/xfs_iomap.cmodified+1−1View file
fs/xfs/xfs_qm.cmodified+30−16View file

fs/xfs/xfs_aops.c

View file
diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c
index 21e2d70..4fc526a 100644
--- a/fs/xfs/xfs_aops.c
+++ b/fs/xfs/xfs_aops.c
@@ -399,7 +399,7 @@ xfs_map_blocks(
(ip->i_df.if_flags & XFS_IFEXTENTS));
ASSERT(offset <= mp->m_super->s_maxbytes);
- if ((xfs_ufsize_t)offset + count > mp->m_super->s_maxbytes)
+ if (offset > mp->m_super->s_maxbytes - count)
count = mp->m_super->s_maxbytes - offset;
end_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)offset + count);
offset_fsb = XFS_B_TO_FSBT(mp, offset);
@@ -1312,7 +1312,7 @@ xfs_get_blocks(
lockmode = xfs_ilock_data_map_shared(ip);
ASSERT(offset <= mp->m_super->s_maxbytes);
- if ((xfs_ufsize_t)offset + size > mp->m_super->s_maxbytes)
+ if (offset > mp->m_super->s_maxbytes - size)
size = mp->m_super->s_maxbytes - offset;
end_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)offset + size);
offset_fsb = XFS_B_TO_FSBT(mp, offset);

fs/xfs/xfs_iomap.c

View file
diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c
index 7ab52a8..66e1edb 100644
--- a/fs/xfs/xfs_iomap.c
+++ b/fs/xfs/xfs_iomap.c
@@ -1006,7 +1006,7 @@ xfs_file_iomap_begin(
}
ASSERT(offset <= mp->m_super->s_maxbytes);
- if ((xfs_fsize_t)offset + length > mp->m_super->s_maxbytes)
+ if (offset > mp->m_super->s_maxbytes - length)
length = mp->m_super->s_maxbytes - offset;
offset_fsb = XFS_B_TO_FSBT(mp, offset);
end_fsb = XFS_B_TO_FSB(mp, offset + length);

fs/xfs/xfs_qm.c

View file
diff --git a/fs/xfs/xfs_qm.c b/fs/xfs/xfs_qm.c
index ec952df..b897b11 100644
--- a/fs/xfs/xfs_qm.c
+++ b/fs/xfs/xfs_qm.c
@@ -48,7 +48,7 @@
STATIC int xfs_qm_init_quotainos(xfs_mount_t *);
STATIC int xfs_qm_init_quotainfo(xfs_mount_t *);
-
+STATIC void xfs_qm_destroy_quotainos(xfs_quotainfo_t *qi);
STATIC void xfs_qm_dqfree_one(struct xfs_dquot *dqp);
/*
* We use the batch lookup interface to iterate over the dquots as it
@@ -695,9 +695,17 @@ xfs_qm_init_quotainfo(
qinf->qi_shrinker.scan_objects = xfs_qm_shrink_scan;
qinf->qi_shrinker.seeks = DEFAULT_SEEKS;
qinf->qi_shrinker.flags = SHRINKER_NUMA_AWARE;
- register_shrinker(&qinf->qi_shrinker);
+
+ error = register_shrinker(&qinf->qi_shrinker);
+ if (error)
+ goto out_free_inos;
+
return 0;
+out_free_inos:
+ mutex_destroy(&qinf->qi_quotaofflock);
+ mutex_destroy(&qinf->qi_tree_lock);
+ xfs_qm_destroy_quotainos(qinf);
out_free_lru:
list_lru_destroy(&qinf->qi_lru);
out_free_qinf:
@@ -706,7 +714,6 @@ out_free_qinf:
return error;
}
-
/*
* Gets called when unmounting a filesystem or when all quotas get
* turned off.
@@ -723,19 +730,8 @@ xfs_qm_destroy_quotainfo(
unregister_shrinker(&qi->qi_shrinker);
list_lru_destroy(&qi->qi_lru);
-
- if (qi->qi_uquotaip) {
- IRELE(qi->qi_uquotaip);
- qi->qi_uquotaip = NULL; /* paranoia */
- }
- if (qi->qi_gquotaip) {
- IRELE(qi->qi_gquotaip);
- qi->qi_gquotaip = NULL;
- }
- if (qi->qi_pquotaip) {
- IRELE(qi->qi_pquotaip);
- qi->qi_pquotaip = NULL;
- }
+ xfs_qm_destroy_quotainos(qi);
+ mutex_destroy(&qi->qi_tree_lock);
mutex_destroy(&qi->qi_quotaofflock);
kmem_free(qi);
mp->m_quotainfo = NULL;
@@ -1600,6 +1596,24 @@ error_rele:
}
STATIC void
+xfs_qm_destroy_quotainos(
+ xfs_quotainfo_t *qi)
+{
+ if (qi->qi_uquotaip) {
+ IRELE(qi->qi_uquotaip);
+ qi->qi_uquotaip = NULL; /* paranoia */
+ }
+ if (qi->qi_gquotaip) {
+ IRELE(qi->qi_gquotaip);
+ qi->qi_gquotaip = NULL;
+ }
+ if (qi->qi_pquotaip) {
+ IRELE(qi->qi_pquotaip);
+ qi->qi_pquotaip = NULL;
+ }
+}
+
+STATIC void
xfs_qm_dqfree_one(
struct xfs_dquot *dqp)
{