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Fixes for 5.5-rc1: 

- Fix a crash in the log setup code when log mounting fails
 - Fix a hang when allocating space on the realtime device
 - Fix a block leak when freeing space on the realtime device
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Merge tag 'xfs-5.5-merge-17' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux

Pull xfs fixes from Darrick Wong:
 "Fix a couple of resource management errors and a hang:

   - fix a crash in the log setup code when log mounting fails

   - fix a hang when allocating space on the realtime device

   - fix a block leak when freeing space on the realtime device"

* tag 'xfs-5.5-merge-17' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
  xfs: fix mount failure crash on invalid iclog memory access
  xfs: don't check for AG deadlock for realtime files in bunmapi
  xfs: fix realtime file data space leak
This commit is contained in:
Linus Torvalds 2019-12-07 17:05:33 -08:00
parent 316933cf74 798a9cada4
commit 50caca9d7f
2 changed files with 17 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
fs/xfs/libxfs/xfs_bmap.c
View File

@ -5404,7 +5404,7 @@ __xfs_bunmapi(
* Make sure we don't touch multiple AGF headers out of order
* in a single transaction, as that could cause AB-BA deadlocks.
*/
if (!wasdel) {
if (!wasdel && !isrt) {
agno = XFS_FSB_TO_AGNO(mp, del.br_startblock);
if (prev_agno != NULLAGNUMBER && prev_agno > agno)
break;
@ -5480,16 +5480,17 @@ __xfs_bunmapi(
}
div_u64_rem(del.br_startblock, mp->m_sb.sb_rextsize, &mod);
if (mod) {
xfs_extlen_t off = mp->m_sb.sb_rextsize - mod;
/*
* Realtime extent is lined up at the end but not
* at the front. We'll get rid of full extents if
* we can.
*/
mod = mp->m_sb.sb_rextsize - mod;
if (del.br_blockcount > mod) {
del.br_blockcount -= mod;
del.br_startoff += mod;
del.br_startblock += mod;
if (del.br_blockcount > off) {
del.br_blockcount -= off;
del.br_startoff += off;
del.br_startblock += off;
} else if (del.br_startoff == start &&
(del.br_state == XFS_EXT_UNWRITTEN ||
tp->t_blk_res == 0)) {
@ -5507,6 +5508,7 @@ __xfs_bunmapi(
continue;
} else if (del.br_state == XFS_EXT_UNWRITTEN) {
struct xfs_bmbt_irec prev;
xfs_fileoff_t unwrite_start;
/*
* This one is already unwritten.
@ -5520,12 +5522,13 @@ __xfs_bunmapi(
ASSERT(!isnullstartblock(prev.br_startblock));
ASSERT(del.br_startblock ==
prev.br_startblock + prev.br_blockcount);
if (prev.br_startoff < start) {
mod = start - prev.br_startoff;
prev.br_blockcount -= mod;
prev.br_startblock += mod;
prev.br_startoff = start;
}
unwrite_start = max3(start,
del.br_startoff - mod,
prev.br_startoff);
mod = unwrite_start - prev.br_startoff;
prev.br_startoff = unwrite_start;
prev.br_startblock += mod;
prev.br_blockcount -= mod;
prev.br_state = XFS_EXT_UNWRITTEN;
error = xfs_bmap_add_extent_unwritten_real(tp,
ip, whichfork, &icur, &cur,

2
fs/xfs/xfs_log.c
View File

@ -1542,6 +1542,8 @@ out_free_iclog:
prev_iclog = iclog->ic_next;
kmem_free(iclog->ic_data);
kmem_free(iclog);
if (prev_iclog == log->l_iclog)
break;
}
out_free_log:
kmem_free(log);