From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Chandan Rajendra <chandan@linux.ibm.com>,
Harish Sriram <harish@linux.ibm.com>, Jan Kara <jack@suse.cz>,
Theodore Ts'o <tytso@mit.edu>, Sasha Levin <sashal@kernel.org>,
linux-ext4@vger.kernel.org
Subject: [PATCH AUTOSEL 5.3 15/33] jbd2: flush_descriptor(): Do not decrease buffer head's ref count
Date: Fri, 25 Oct 2019 09:54:47 -0400 [thread overview]
Message-ID: <20191025135505.24762-15-sashal@kernel.org> (raw)
In-Reply-To: <20191025135505.24762-1-sashal@kernel.org>
From: Chandan Rajendra <chandan@linux.ibm.com>
[ Upstream commit 547b9ad698b434eadca46319cb47e5875b55ef03 ]
When executing generic/388 on a ppc64le machine, we notice the following
call trace,
VFS: brelse: Trying to free free buffer
WARNING: CPU: 0 PID: 6637 at /root/repos/linux/fs/buffer.c:1195 __brelse+0x84/0xc0
Call Trace:
__brelse+0x80/0xc0 (unreliable)
invalidate_bh_lru+0x78/0xc0
on_each_cpu_mask+0xa8/0x130
on_each_cpu_cond_mask+0x130/0x170
invalidate_bh_lrus+0x44/0x60
invalidate_bdev+0x38/0x70
ext4_put_super+0x294/0x560
generic_shutdown_super+0xb0/0x170
kill_block_super+0x38/0xb0
deactivate_locked_super+0xa4/0xf0
cleanup_mnt+0x164/0x1d0
task_work_run+0x110/0x160
do_notify_resume+0x414/0x460
ret_from_except_lite+0x70/0x74
The warning happens because flush_descriptor() drops bh reference it
does not own. The bh reference acquired by
jbd2_journal_get_descriptor_buffer() is owned by the log_bufs list and
gets released when this list is processed. The reference for doing IO is
only acquired in write_dirty_buffer() later in flush_descriptor().
Reported-by: Harish Sriram <harish@linux.ibm.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Chandan Rajendra <chandan@linux.ibm.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
fs/jbd2/revoke.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/fs/jbd2/revoke.c b/fs/jbd2/revoke.c
index 69b9bc329964f..f08073d7bbf57 100644
--- a/fs/jbd2/revoke.c
+++ b/fs/jbd2/revoke.c
@@ -638,10 +638,8 @@ static void flush_descriptor(journal_t *journal,
{
jbd2_journal_revoke_header_t *header;
- if (is_journal_aborted(journal)) {
- put_bh(descriptor);
+ if (is_journal_aborted(journal))
return;
- }
header = (jbd2_journal_revoke_header_t *)descriptor->b_data;
header->r_count = cpu_to_be32(offset);
--
2.20.1
next prev parent reply other threads:[~2019-10-25 13:55 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-25 13:54 [PATCH AUTOSEL 5.3 01/33] net: ipv6: fix listify ip6_rcv_finish in case of forwarding Sasha Levin
2019-10-25 13:54 ` [PATCH AUTOSEL 5.3 02/33] sch_netem: fix rcu splat in netem_enqueue() Sasha Levin
2019-10-25 13:54 ` [PATCH AUTOSEL 5.3 03/33] net: sched: sch_sfb: don't call qdisc_put() while holding tree lock Sasha Levin
2019-10-25 13:54 ` [PATCH AUTOSEL 5.3 04/33] rxrpc: Fix call ref leak Sasha Levin
2019-10-25 13:54 ` [PATCH AUTOSEL 5.3 05/33] rxrpc: Fix trace-after-put looking at the put peer record Sasha Levin
2019-10-25 13:54 ` [PATCH AUTOSEL 5.3 06/33] rxrpc: rxrpc_peer needs to hold a ref on the rxrpc_local record Sasha Levin
2019-10-25 13:54 ` [PATCH AUTOSEL 5.3 07/33] llc: fix sk_buff leak in llc_sap_state_process() Sasha Levin
2019-10-25 13:54 ` [PATCH AUTOSEL 5.3 08/33] llc: fix sk_buff leak in llc_conn_service() Sasha Levin
2019-10-25 13:54 ` [PATCH AUTOSEL 5.3 09/33] NFC: pn533: fix use-after-free and memleaks Sasha Levin
2019-10-25 13:54 ` [PATCH AUTOSEL 5.3 10/33] bonding: fix potential NULL deref in bond_update_slave_arr Sasha Levin
2019-10-25 13:54 ` [PATCH AUTOSEL 5.3 11/33] netfilter: conntrack: avoid possible false sharing Sasha Levin
2019-10-25 13:54 ` [PATCH AUTOSEL 5.3 12/33] blackhole_netdev: fix syzkaller reported issue Sasha Levin
2019-10-25 15:49 ` Sasha Levin
2019-10-25 13:54 ` [PATCH AUTOSEL 5.3 13/33] net: usb: sr9800: fix uninitialized local variable Sasha Levin
2019-10-25 13:54 ` [PATCH AUTOSEL 5.3 14/33] scsi: qla2xxx: Fix different size DMA Alloc/Unmap Sasha Levin
2019-10-25 13:54 ` Sasha Levin [this message]
2019-10-25 13:54 ` [PATCH AUTOSEL 5.3 16/33] netfilter: connlabels: prefer static lock initialiser Sasha Levin
2019-10-25 13:54 ` [PATCH AUTOSEL 5.3 17/33] usb: typec: fusb302: Call fusb302_debugfs_init earlier Sasha Levin
2019-10-25 13:54 ` [PATCH AUTOSEL 5.3 18/33] f2fs: fix to avoid discard command leak Sasha Levin
2019-10-25 13:54 ` [PATCH AUTOSEL 5.3 19/33] net/rds: Whitelist rdma_cookie and rx_tstamp for usercopy Sasha Levin
2019-10-25 13:54 ` [PATCH AUTOSEL 5.3 20/33] scsi: qedf: Fix crash during sg_reset Sasha Levin
2019-10-25 13:54 ` [PATCH AUTOSEL 5.3 21/33] ath9k: dynack: fix possible deadlock in ath_dynack_node_{de}init Sasha Levin
2019-10-25 13:54 ` [PATCH AUTOSEL 5.3 22/33] Btrfs: fix hang when loading existing inode cache off disk Sasha Levin
2019-10-25 13:54 ` [PATCH AUTOSEL 5.3 23/33] Btrfs: fix inode cache block reserve leak on failure to allocate data space Sasha Levin
2019-10-25 13:54 ` [PATCH AUTOSEL 5.3 24/33] ubi: ubi_wl_get_peb: Increase the number of attempts while getting PEB Sasha Levin
2019-10-25 13:54 ` [PATCH AUTOSEL 5.3 25/33] net: sched: sch_htb: don't call qdisc_put() while holding tree lock Sasha Levin
2019-10-25 13:54 ` [PATCH AUTOSEL 5.3 26/33] net: sched: multiq: " Sasha Levin
2019-10-25 13:54 ` [PATCH AUTOSEL 5.3 27/33] RDMA/siw: Fix serialization issue in write_space() Sasha Levin
2019-10-25 13:55 ` [PATCH AUTOSEL 5.3 28/33] RDMA/iwcm: Fix a lock inversion issue Sasha Levin
2019-10-25 13:55 ` [PATCH AUTOSEL 5.3 29/33] ipv6: Handle race in addrconf_dad_work Sasha Levin
2019-10-25 13:55 ` [PATCH AUTOSEL 5.3 30/33] bdi: Do not use freezable workqueue Sasha Levin
2019-10-25 13:55 ` [PATCH AUTOSEL 5.3 31/33] sctp: add chunks to sk_backlog when the newsk sk_socket is not set Sasha Levin
2019-10-25 13:55 ` [PATCH AUTOSEL 5.3 32/33] ALSA: hda: Add codec on bus address table lately Sasha Levin
2019-10-25 14:09 ` Takashi Iwai
2019-10-25 13:55 ` [PATCH AUTOSEL 5.3 33/33] nvme: Add quirk for Kingston NVME SSD running FW E8FK11.T Sasha Levin
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