From: Sasha Levin <sashal@kernel.org>
To: stable@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Taehee Yoo <ap420073@gmail.com>,
Pablo Neira Ayuso <pablo@netfilter.org>,
Sasha Levin <sashal@kernel.org>
Subject: [PATCH AUTOSEL 4.18 044/100] netfilter: nft_set_rbtree: add missing rb_erase() in GC routine
Date: Tue, 16 Oct 2018 00:11:25 -0400 [thread overview]
Message-ID: <20181016041221.135528-44-sashal@kernel.org> (raw)
In-Reply-To: <20181016041221.135528-1-sashal@kernel.org>
From: Taehee Yoo <ap420073@gmail.com>
[ Upstream commit a13f814a67b12a2f29d1decf4b4f4e700658a517 ]
The nft_set_gc_batch_check() checks whether gc buffer is full.
If gc buffer is full, gc buffer is released by
the nft_set_gc_batch_complete() internally.
In case of rbtree, the rb_erase() should be called before calling the
nft_set_gc_batch_complete(). therefore the rb_erase() should
be called before calling the nft_set_gc_batch_check() too.
test commands:
table ip filter {
set set1 {
type ipv4_addr; flags interval, timeout;
gc-interval 10s;
timeout 1s;
elements = {
1-2,
3-4,
5-6,
...
10000-10001,
}
}
}
%nft -f test.nft
splat looks like:
[ 430.273885] kasan: GPF could be caused by NULL-ptr deref or user memory access
[ 430.282158] general protection fault: 0000 [#1] SMP DEBUG_PAGEALLOC KASAN PTI
[ 430.283116] CPU: 1 PID: 190 Comm: kworker/1:2 Tainted: G B 4.18.0+ #7
[ 430.283116] Workqueue: events_power_efficient nft_rbtree_gc [nf_tables_set]
[ 430.313559] RIP: 0010:rb_next+0x81/0x130
[ 430.313559] Code: 08 49 bd 00 00 00 00 00 fc ff df 48 bb 00 00 00 00 00 fc ff df 48 85 c0 75 05 eb 58 48 89 d4
[ 430.313559] RSP: 0018:ffff88010cdb7680 EFLAGS: 00010207
[ 430.313559] RAX: 0000000000b84854 RBX: dffffc0000000000 RCX: ffffffff83f01973
[ 430.313559] RDX: 000000000017090c RSI: 0000000000000008 RDI: 0000000000b84864
[ 430.313559] RBP: ffff8801060d4588 R08: fffffbfff09bc349 R09: fffffbfff09bc349
[ 430.313559] R10: 0000000000000001 R11: fffffbfff09bc348 R12: ffff880100f081a8
[ 430.313559] R13: dffffc0000000000 R14: ffff880100ff8688 R15: dffffc0000000000
[ 430.313559] FS: 0000000000000000(0000) GS:ffff88011b400000(0000) knlGS:0000000000000000
[ 430.313559] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 430.313559] CR2: 0000000001551008 CR3: 000000005dc16000 CR4: 00000000001006e0
[ 430.313559] Call Trace:
[ 430.313559] nft_rbtree_gc+0x112/0x5c0 [nf_tables_set]
[ 430.313559] process_one_work+0xc13/0x1ec0
[ 430.313559] ? _raw_spin_unlock_irq+0x29/0x40
[ 430.313559] ? pwq_dec_nr_in_flight+0x3c0/0x3c0
[ 430.313559] ? set_load_weight+0x270/0x270
[ 430.313559] ? __switch_to_asm+0x34/0x70
[ 430.313559] ? __switch_to_asm+0x40/0x70
[ 430.313559] ? __switch_to_asm+0x34/0x70
[ 430.313559] ? __switch_to_asm+0x34/0x70
[ 430.313559] ? __switch_to_asm+0x40/0x70
[ 430.313559] ? __switch_to_asm+0x34/0x70
[ 430.313559] ? __switch_to_asm+0x40/0x70
[ 430.313559] ? __switch_to_asm+0x34/0x70
[ 430.313559] ? __switch_to_asm+0x34/0x70
[ 430.313559] ? __switch_to_asm+0x40/0x70
[ 430.313559] ? __switch_to_asm+0x34/0x70
[ 430.313559] ? __schedule+0x6d3/0x1f50
[ 430.313559] ? find_held_lock+0x39/0x1c0
[ 430.313559] ? __sched_text_start+0x8/0x8
[ 430.313559] ? cyc2ns_read_end+0x10/0x10
[ 430.313559] ? save_trace+0x300/0x300
[ 430.313559] ? sched_clock_local+0xd4/0x140
[ 430.313559] ? find_held_lock+0x39/0x1c0
[ 430.313559] ? worker_thread+0x353/0x1120
[ 430.313559] ? worker_thread+0x353/0x1120
[ 430.313559] ? lock_contended+0xe70/0xe70
[ 430.313559] ? __lock_acquire+0x4500/0x4500
[ 430.535635] ? do_raw_spin_unlock+0xa5/0x330
[ 430.535635] ? do_raw_spin_trylock+0x101/0x1a0
[ 430.535635] ? do_raw_spin_lock+0x1f0/0x1f0
[ 430.535635] ? _raw_spin_lock_irq+0x10/0x70
[ 430.535635] worker_thread+0x15d/0x1120
[ ... ]
Fixes: 8d8540c4f5e0 ("netfilter: nft_set_rbtree: add timeout support")
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
net/netfilter/nft_set_rbtree.c | 28 ++++++++++++++--------------
1 file changed, 14 insertions(+), 14 deletions(-)
diff --git a/net/netfilter/nft_set_rbtree.c b/net/netfilter/nft_set_rbtree.c
index 9873d734b494..8ad78b82c8e2 100644
--- a/net/netfilter/nft_set_rbtree.c
+++ b/net/netfilter/nft_set_rbtree.c
@@ -355,12 +355,11 @@ static void nft_rbtree_walk(const struct nft_ctx *ctx,
static void nft_rbtree_gc(struct work_struct *work)
{
+ struct nft_rbtree_elem *rbe, *rbe_end = NULL, *rbe_prev = NULL;
struct nft_set_gc_batch *gcb = NULL;
- struct rb_node *node, *prev = NULL;
- struct nft_rbtree_elem *rbe;
struct nft_rbtree *priv;
+ struct rb_node *node;
struct nft_set *set;
- int i;
priv = container_of(work, struct nft_rbtree, gc_work.work);
set = nft_set_container_of(priv);
@@ -371,7 +370,7 @@ static void nft_rbtree_gc(struct work_struct *work)
rbe = rb_entry(node, struct nft_rbtree_elem, node);
if (nft_rbtree_interval_end(rbe)) {
- prev = node;
+ rbe_end = rbe;
continue;
}
if (!nft_set_elem_expired(&rbe->ext))
@@ -379,29 +378,30 @@ static void nft_rbtree_gc(struct work_struct *work)
if (nft_set_elem_mark_busy(&rbe->ext))
continue;
+ if (rbe_prev) {
+ rb_erase(&rbe_prev->node, &priv->root);
+ rbe_prev = NULL;
+ }
gcb = nft_set_gc_batch_check(set, gcb, GFP_ATOMIC);
if (!gcb)
break;
atomic_dec(&set->nelems);
nft_set_gc_batch_add(gcb, rbe);
+ rbe_prev = rbe;
- if (prev) {
- rbe = rb_entry(prev, struct nft_rbtree_elem, node);
+ if (rbe_end) {
atomic_dec(&set->nelems);
- nft_set_gc_batch_add(gcb, rbe);
- prev = NULL;
+ nft_set_gc_batch_add(gcb, rbe_end);
+ rb_erase(&rbe_end->node, &priv->root);
+ rbe_end = NULL;
}
node = rb_next(node);
if (!node)
break;
}
- if (gcb) {
- for (i = 0; i < gcb->head.cnt; i++) {
- rbe = gcb->elems[i];
- rb_erase(&rbe->node, &priv->root);
- }
- }
+ if (rbe_prev)
+ rb_erase(&rbe_prev->node, &priv->root);
write_seqcount_end(&priv->count);
write_unlock_bh(&priv->lock);
--
2.17.1
next prev parent reply other threads:[~2018-10-16 4:33 UTC|newest]
Thread overview: 100+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-16 4:10 [PATCH AUTOSEL 4.18 001/100] xfrm: Validate address prefix lengths in the xfrm selector Sasha Levin
2018-10-16 4:10 ` [PATCH AUTOSEL 4.18 002/100] xfrm6: call kfree_skb when skb is toobig Sasha Levin
2018-10-16 4:10 ` [PATCH AUTOSEL 4.18 003/100] xfrm: reset transport header back to network header after all input transforms ahave been applied Sasha Levin
2018-10-16 4:10 ` [PATCH AUTOSEL 4.18 004/100] xfrm: reset crypto_done when iterating over multiple input xfrms Sasha Levin
2018-10-16 4:10 ` [PATCH AUTOSEL 4.18 005/100] mac80211: Always report TX status Sasha Levin
2018-10-16 4:10 ` [PATCH AUTOSEL 4.18 006/100] cfg80211: reg: Init wiphy_idx in regulatory_hint_core() Sasha Levin
2018-10-16 4:10 ` [PATCH AUTOSEL 4.18 007/100] mac80211: fix pending queue hang due to TX_DROP Sasha Levin
2018-10-16 4:10 ` [PATCH AUTOSEL 4.18 008/100] cfg80211: Address some corner cases in scan result channel updating Sasha Levin
2018-10-16 4:10 ` [PATCH AUTOSEL 4.18 009/100] mac80211: TDLS: fix skb queue/priority assignment Sasha Levin
2018-10-16 4:10 ` [PATCH AUTOSEL 4.18 010/100] mac80211: fix TX status reporting for ieee80211s Sasha Levin
2018-10-16 4:10 ` [PATCH AUTOSEL 4.18 011/100] xfrm: Fix NULL pointer dereference when skb_dst_force clears the dst_entry Sasha Levin
2018-10-16 4:10 ` [PATCH AUTOSEL 4.18 012/100] ARM: 8799/1: mm: fix pci_ioremap_io() offset check Sasha Levin
2018-10-16 4:10 ` [PATCH AUTOSEL 4.18 013/100] xfrm: validate template mode Sasha Levin
2018-10-16 4:10 ` [PATCH AUTOSEL 4.18 014/100] drm/i2c: tda9950: fix timeout counter check Sasha Levin
2018-10-16 4:10 ` [PATCH AUTOSEL 4.18 015/100] drm/i2c: tda9950: set MAX_RETRIES for errors only Sasha Levin
2018-10-16 4:10 ` [PATCH AUTOSEL 4.18 016/100] netfilter: bridge: Don't sabotage nf_hook calls from an l3mdev Sasha Levin
2018-10-16 4:10 ` [PATCH AUTOSEL 4.18 017/100] netfilter: conntrack: get rid of double sizeof Sasha Levin
2018-10-16 4:10 ` [PATCH AUTOSEL 4.18 018/100] arm64: hugetlb: Fix handling of young ptes Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 019/100] ARM: dts: BCM63xx: Fix incorrect interrupt specifiers Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 020/100] net: macb: Clean 64b dma addresses if they are not detected Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 021/100] net: hns: fix for unmapping problem when SMMU is on Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 022/100] soc: fsl: qbman: qman: avoid allocating from non existing gen_pool Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 023/100] soc: fsl: qe: Fix copy/paste bug in ucc_get_tdm_sync_shift() Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 024/100] nl80211: Fix possible Spectre-v1 for NL80211_TXRATE_HT Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 025/100] mac80211_hwsim: fix locking when iterating radios during ns exit Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 026/100] mac80211_hwsim: fix race in radio destruction from netlink notifier Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 027/100] mac80211_hwsim: do not omit multicast announce of first added radio Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 028/100] Bluetooth: SMP: fix crash in unpairing Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 029/100] pxa168fb: prepare the clock Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 030/100] qed: Avoid implicit enum conversion in qed_set_tunn_cls_info Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 031/100] qed: Fix mask parameter in qed_vf_prep_tunn_req_tlv Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 032/100] qed: Avoid implicit enum conversion in qed_roce_mode_to_flavor Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 033/100] bonding: pass link-local packets to bonding master also Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 034/100] bonding: avoid possible dead-lock Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 035/100] qed: Avoid constant logical operation warning in qed_vf_pf_acquire Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 036/100] qed: Avoid implicit enum conversion in qed_iwarp_parse_rx_pkt Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 037/100] bnxt_en: Fix TX timeout during netpoll Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 038/100] nl80211: Fix possible Spectre-v1 for CQM RSSI thresholds Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 039/100] scsi: qedi: Initialize the stats mutex lock Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 040/100] rxrpc: Fix checks as to whether we should set up a new call Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 041/100] rxrpc: Fix RTT gathering Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 042/100] rxrpc: Fix transport sockopts to get IPv4 errors on an IPv6 socket Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 043/100] rxrpc: Fix error distribution Sasha Levin
2018-10-16 4:11 ` Sasha Levin [this message]
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 045/100] netfilter: avoid erronous array bounds warning Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 046/100] qed: Fix shmem structure inconsistency between driver and the mfw Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 047/100] asix: Check for supported Wake-on-LAN modes Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 048/100] ax88179_178a: " Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 049/100] lan78xx: " Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 050/100] sr9800: " Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 051/100] r8152: Check for supported Wake-on-LAN Modes Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 052/100] smsc75xx: Check for Wake-on-LAN modes Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 053/100] smsc95xx: " Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 054/100] qlcnic: fix Tx descriptor corruption on 82xx devices Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 055/100] i2c: i2c-scmi: fix for i2c_smbus_write_block_data Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 056/100] cfg80211: fix use-after-free in reg_process_hint() Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 057/100] KVM: nVMX: Do not expose MPX VMX controls when guest MPX disabled Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 058/100] KVM: x86: Do not use kvm_x86_ops->mpx_supported() directly Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 059/100] KVM: nVMX: Fix emulation of VM_ENTRY_LOAD_BNDCFGS Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 060/100] net/mlx5: E-Switch, Fix out of bound access when setting vport rate Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 061/100] net/mlx5e: Set vlan masks for all offloaded TC rules Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 062/100] tun: remove unused parameters Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 063/100] tun: initialize napi_mutex unconditionally Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 064/100] r8169: fix network stalls due to missing bit TXCFG_AUTO_FIFO Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 065/100] perf/core: Fix perf_pmu_unregister() locking Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 066/100] perf/x86/intel/uncore: Use boot_cpu_data.phys_proc_id instead of hardcorded physical package ID 0 Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 067/100] perf/ring_buffer: Prevent concurent ring buffer access Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 068/100] perf/x86/intel/uncore: Fix PCI BDF address of M3UPI on SKX Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 069/100] perf/x86/amd/uncore: Set ThreadMask and SliceMask for L3 Cache perf events Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 070/100] thunderbolt: Do not handle ICM events after domain is stopped Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 071/100] thunderbolt: Initialize after IOMMUs Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 072/100] net: fec: fix rare tx timeout Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 073/100] declance: Fix continuation with the adapter identification message Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 074/100] nfp: avoid soft lockups under control message storm Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 075/100] RISCV: Fix end PFN for low memory Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 076/100] Revert "serial: 8250_dw: Fix runtime PM handling" Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 077/100] bonding: fix warning message Sasha Levin
2018-10-16 4:11 ` [PATCH AUTOSEL 4.18 078/100] net: qualcomm: rmnet: Skip processing loopback packets Sasha Levin
2018-10-16 4:12 ` [PATCH AUTOSEL 4.18 079/100] net: qualcomm: rmnet: Fix incorrect allocation flag in transmit Sasha Levin
2018-10-16 4:12 ` [PATCH AUTOSEL 4.18 080/100] net: qualcomm: rmnet: Fix incorrect allocation flag in receive path Sasha Levin
2018-10-16 4:12 ` [PATCH AUTOSEL 4.18 081/100] locking/ww_mutex: Fix runtime warning in the WW mutex selftest Sasha Levin
2018-10-16 4:12 ` [PATCH AUTOSEL 4.18 082/100] drm/amd/display: Signal hw_done() after waiting for flip_done() Sasha Levin
2018-10-16 4:12 ` [PATCH AUTOSEL 4.18 083/100] net/usb: cancel pending work when unbinding smsc75xx Sasha Levin
2018-10-16 4:12 ` [PATCH AUTOSEL 4.18 084/100] team: Forbid enslaving team device to itself Sasha Levin
2018-10-16 4:12 ` [PATCH AUTOSEL 4.18 085/100] bnxt_en: Fix VNIC reservations on the PF Sasha Levin
2018-10-16 4:12 ` [PATCH AUTOSEL 4.18 086/100] bnxt_en: Fix enables field in HWRM_QUEUE_COS2BW_CFG request Sasha Levin
2018-10-16 4:12 ` [PATCH AUTOSEL 4.18 087/100] bnxt_en: get the reduced max_irqs by the ones used by RDMA Sasha Levin
2018-10-16 4:12 ` [PATCH AUTOSEL 4.18 088/100] net: dsa: b53: Keep CPU port as tagged in all VLANs Sasha Levin
2018-10-16 4:12 ` [PATCH AUTOSEL 4.18 089/100] be2net: don't flip hw_features when VXLANs are added/deleted Sasha Levin
2018-10-16 4:12 ` [PATCH AUTOSEL 4.18 090/100] net: phy: phylink: fix SFP interface autodetection Sasha Levin
2018-10-16 4:12 ` [PATCH AUTOSEL 4.18 091/100] powerpc/numa: Skip onlining a offline node in kdump path Sasha Levin
2018-10-16 4:12 ` [PATCH AUTOSEL 4.18 092/100] net: cxgb3_main: fix a missing-check bug Sasha Levin
2018-10-16 4:12 ` [PATCH AUTOSEL 4.18 093/100] yam: " Sasha Levin
2018-10-16 4:12 ` [PATCH AUTOSEL 4.18 094/100] net: mvpp2: Extract the correct ethtype from the skb for tx csum offload Sasha Levin
2018-10-16 4:12 ` [PATCH AUTOSEL 4.18 095/100] ocfs2: fix crash in ocfs2_duplicate_clusters_by_page() Sasha Levin
2018-10-16 4:12 ` [PATCH AUTOSEL 4.18 096/100] mm/gup_benchmark: fix unsigned comparison to zero in __gup_benchmark_ioctl Sasha Levin
2018-10-16 4:12 ` [PATCH AUTOSEL 4.18 097/100] mm/migrate.c: split only transparent huge pages when allocation fails Sasha Levin
2018-10-16 4:12 ` [PATCH AUTOSEL 4.18 098/100] mm/vmstat.c: fix outdated vmstat_text Sasha Levin
2018-10-16 4:12 ` [PATCH AUTOSEL 4.18 099/100] x86/paravirt: Fix some warning messages Sasha Levin
2018-10-16 4:12 ` [PATCH AUTOSEL 4.18 100/100] clk: mvebu: armada-37xx-periph: Remove unused var num_parents Sasha Levin
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