From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: stable@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
patches@lists.linux.dev, Eric Dumazet <edumazet@google.com>,
Simon Horman <horms@kernel.org>, David Ahern <dsahern@kernel.org>,
Jakub Kicinski <kuba@kernel.org>, Sasha Levin <sashal@kernel.org>
Subject: [PATCH 5.10 087/111] ipv6: fib6_rules: avoid possible NULL dereference in fib6_rule_action()
Date: Tue, 14 May 2024 12:20:25 +0200 [thread overview]
Message-ID: <20240514101000.437068198@linuxfoundation.org> (raw)
In-Reply-To: <20240514100957.114746054@linuxfoundation.org>
5.10-stable review patch. If anyone has any objections, please let me know.
------------------
From: Eric Dumazet <edumazet@google.com>
[ Upstream commit d101291b2681e5ab938554e3e323f7a7ee33e3aa ]
syzbot is able to trigger the following crash [1],
caused by unsafe ip6_dst_idev() use.
Indeed ip6_dst_idev() can return NULL, and must always be checked.
[1]
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 0 PID: 31648 Comm: syz-executor.0 Not tainted 6.9.0-rc4-next-20240417-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:__fib6_rule_action net/ipv6/fib6_rules.c:237 [inline]
RIP: 0010:fib6_rule_action+0x241/0x7b0 net/ipv6/fib6_rules.c:267
Code: 02 00 00 49 8d 9f d8 00 00 00 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 f9 32 bf f7 48 8b 1b 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 e0 32 bf f7 4c 8b 03 48 89 ef 4c
RSP: 0018:ffffc9000fc1f2f0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 1a772f98c8186700
RDX: 0000000000000003 RSI: ffffffff8bcac4e0 RDI: ffffffff8c1f9760
RBP: ffff8880673fb980 R08: ffffffff8fac15ef R09: 1ffffffff1f582bd
R10: dffffc0000000000 R11: fffffbfff1f582be R12: dffffc0000000000
R13: 0000000000000080 R14: ffff888076509000 R15: ffff88807a029a00
FS: 00007f55e82ca6c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31d23000 CR3: 0000000022b66000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
fib_rules_lookup+0x62c/0xdb0 net/core/fib_rules.c:317
fib6_rule_lookup+0x1fd/0x790 net/ipv6/fib6_rules.c:108
ip6_route_output_flags_noref net/ipv6/route.c:2637 [inline]
ip6_route_output_flags+0x38e/0x610 net/ipv6/route.c:2649
ip6_route_output include/net/ip6_route.h:93 [inline]
ip6_dst_lookup_tail+0x189/0x11a0 net/ipv6/ip6_output.c:1120
ip6_dst_lookup_flow+0xb9/0x180 net/ipv6/ip6_output.c:1250
sctp_v6_get_dst+0x792/0x1e20 net/sctp/ipv6.c:326
sctp_transport_route+0x12c/0x2e0 net/sctp/transport.c:455
sctp_assoc_add_peer+0x614/0x15c0 net/sctp/associola.c:662
sctp_connect_new_asoc+0x31d/0x6c0 net/sctp/socket.c:1099
__sctp_connect+0x66d/0xe30 net/sctp/socket.c:1197
sctp_connect net/sctp/socket.c:4819 [inline]
sctp_inet_connect+0x149/0x1f0 net/sctp/socket.c:4834
__sys_connect_file net/socket.c:2048 [inline]
__sys_connect+0x2df/0x310 net/socket.c:2065
__do_sys_connect net/socket.c:2075 [inline]
__se_sys_connect net/socket.c:2072 [inline]
__x64_sys_connect+0x7a/0x90 net/socket.c:2072
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Fixes: 5e5f3f0f8013 ("[IPV6] ADDRCONF: Convert ipv6_get_saddr() to ipv6_dev_get_saddr().")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Reviewed-by: David Ahern <dsahern@kernel.org>
Link: https://lore.kernel.org/r/20240507163145.835254-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
net/ipv6/fib6_rules.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/net/ipv6/fib6_rules.c b/net/ipv6/fib6_rules.c
index 55cd23b7a9357..cf9a44fb8243d 100644
--- a/net/ipv6/fib6_rules.c
+++ b/net/ipv6/fib6_rules.c
@@ -232,8 +232,12 @@ static int __fib6_rule_action(struct fib_rule *rule, struct flowi *flp,
rt = pol_lookup_func(lookup,
net, table, flp6, arg->lookup_data, flags);
if (rt != net->ipv6.ip6_null_entry) {
+ struct inet6_dev *idev = ip6_dst_idev(&rt->dst);
+
+ if (!idev)
+ goto again;
err = fib6_rule_saddr(net, rule, flags, flp6,
- ip6_dst_idev(&rt->dst)->dev);
+ idev->dev);
if (err == -EAGAIN)
goto again;
--
2.43.0
next prev parent reply other threads:[~2024-05-14 11:50 UTC|newest]
Thread overview: 120+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-14 10:18 [PATCH 5.10 000/111] 5.10.217-rc1 review Greg Kroah-Hartman
2024-05-14 10:18 ` [PATCH 5.10 001/111] dmaengine: pl330: issue_pending waits until WFP state Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 002/111] dmaengine: Revert "dmaengine: pl330: issue_pending waits until WFP state" Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 003/111] wifi: nl80211: dont free NULL coalescing rule Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 004/111] eeprom: at24: Use dev_err_probe for nvmem register failure Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 005/111] eeprom: at24: Probe for DDR3 thermal sensor in the SPD case Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 006/111] eeprom: at24: fix memory corruption race condition Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 007/111] pinctrl: pinctrl-aspeed-g6: Fix register offset for pinconf of GPIOR-T Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 008/111] pinctrl/meson: fix typo in PDMs pin name Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 009/111] pinctrl: core: delete incorrect free in pinctrl_enable() Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 010/111] pinctrl: mediatek: paris: Rework mtk_pinconf_{get,set} switch/case logic Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 011/111] pinctrl: mediatek: paris: Fix PIN_CONFIG_INPUT_SCHMITT_ENABLE readback Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 012/111] pinctrl: mediatek: paris: Rework support for PIN_CONFIG_{INPUT,OUTPUT}_ENABLE Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 013/111] sunrpc: add a struct rpc_stats arg to rpc_create_args Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 014/111] nfs: expose /proc/net/sunrpc/nfs in net namespaces Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 015/111] nfs: make the rpc_stat per net namespace Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 016/111] nfs: Handle error of rpc_proc_register() in nfs_net_init() Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 017/111] power: rt9455: hide unused rt9455_boost_voltage_values Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 018/111] pinctrl: devicetree: fix refcount leak in pinctrl_dt_to_map() Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 019/111] regulator: mt6360: De-capitalize devicetree regulator subnodes Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 020/111] s390/mm: Fix storage key clearing for guest huge pages Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 021/111] s390/mm: Fix clearing storage keys for " Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 022/111] bna: ensure the copied buf is NUL terminated Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 023/111] octeontx2-af: avoid off-by-one read from userspace Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 024/111] nsh: Restore skb->{protocol,data,mac_header} for outer header in nsh_gso_segment() Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 025/111] net l2tp: drop flow hash on forward Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 026/111] s390/vdso: Add CFI for RA register to asm macro vdso_func Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 027/111] net: qede: sanitize rc in qede_add_tc_flower_fltr() Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 028/111] net: qede: use return from qede_parse_flow_attr() for flower Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 029/111] net: qede: use return from qede_parse_flow_attr() for flow_spec Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 030/111] net: qede: use return from qede_parse_actions() Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 031/111] ASoC: meson: axg-card: make links nonatomic Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 032/111] ASoC: meson: axg-tdm-interface: manage formatters in trigger Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 033/111] ASoC: Fix 7/8 spaces indentation in Kconfig Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 034/111] ASoC: meson: cards: select SND_DYNAMIC_MINORS Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 035/111] cxgb4: Properly lock TX queue for the selftest Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 036/111] net: dsa: mv88e6xxx: Fix number of databases for 88E6141 / 88E6341 Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 037/111] net: bridge: fix multicast-to-unicast with fraglist GSO Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 038/111] net: core: reject skb_copy(_expand) for fraglist GSO skbs Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 039/111] tipc: fix a possible memleak in tipc_buf_append Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 040/111] net: gro: add flush check in udp_gro_receive_segment Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 041/111] clk: sunxi-ng: h6: Reparent CPUX during PLL CPUX rate change Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 042/111] KVM: arm64: vgic-v2: Use cpuid from userspace as vcpu_id Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 043/111] KVM: arm64: vgic-v2: Check for non-NULL vCPU in vgic_v2_parse_attr() Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 044/111] scsi: lpfc: Update lpfc_ramp_down_queue_handler() logic Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 045/111] gfs2: Fix invalid metadata access in punch_hole Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 046/111] wifi: mac80211: fix ieee80211_bss_*_flags kernel-doc Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 047/111] wifi: cfg80211: fix rdev_dump_mpp() arguments order Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 048/111] net: mark racy access on sk->sk_rcvbuf Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 049/111] scsi: bnx2fc: Remove spin_lock_bh while releasing resources after upload Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 050/111] btrfs: return accurate error code on open failure in open_fs_devices() Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 051/111] ALSA: line6: Zero-initialize message buffers Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 052/111] net: bcmgenet: Reset RBUF on first open Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 053/111] ata: sata_gemini: Check clk_enable() result Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 054/111] firewire: ohci: mask bus reset interrupts between ISR and bottom half Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 055/111] tools/power turbostat: Fix added raw MSR output Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 056/111] tools/power turbostat: Fix Bzy_MHz documentation typo Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 057/111] btrfs: make btrfs_clear_delalloc_extent() free delalloc reserve Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 058/111] btrfs: always clear PERTRANS metadata during commit Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 059/111] scsi: target: Fix SELinux error when systemd-modules loads the target module Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 060/111] blk-iocost: avoid out of bounds shift Greg Kroah-Hartman
2024-05-14 10:19 ` [PATCH 5.10 061/111] gpu: host1x: Do not setup DMA for virtual devices Greg Kroah-Hartman
2024-05-14 10:20 ` [PATCH 5.10 062/111] MIPS: scall: Save thread_info.syscall unconditionally on entry Greg Kroah-Hartman
2024-05-14 10:20 ` [PATCH 5.10 063/111] selftests: timers: Fix valid-adjtimex signed left-shift undefined behavior Greg Kroah-Hartman
2024-05-14 10:20 ` [PATCH 5.10 064/111] fs/9p: only translate RWX permissions for plain 9P2000 Greg Kroah-Hartman
2024-05-14 10:20 ` [PATCH 5.10 065/111] fs/9p: translate O_TRUNC into OTRUNC Greg Kroah-Hartman
2024-05-14 10:20 ` [PATCH 5.10 066/111] 9p: explicitly deny setlease attempts Greg Kroah-Hartman
2024-05-14 10:20 ` [PATCH 5.10 067/111] gpio: wcove: Use -ENOTSUPP consistently Greg Kroah-Hartman
2024-05-14 10:20 ` [PATCH 5.10 068/111] gpio: crystalcove: " Greg Kroah-Hartman
2024-05-14 10:20 ` [PATCH 5.10 069/111] clk: Dont hold prepare_lock when calling kref_put() Greg Kroah-Hartman
2024-05-14 10:20 ` [PATCH 5.10 070/111] fs/9p: drop inodes immediately on non-.L too Greg Kroah-Hartman
2024-05-14 10:20 ` [PATCH 5.10 071/111] drm/nouveau/dp: Dont probe eDP ports twice harder Greg Kroah-Hartman
2024-05-14 10:20 ` [PATCH 5.10 072/111] net:usb:qmi_wwan: support Rolling modules Greg Kroah-Hartman
2024-05-14 10:20 ` [PATCH 5.10 073/111] ASoC: meson: axg-card: Fix nonatomic links Greg Kroah-Hartman
2024-05-14 10:20 ` [PATCH 5.10 074/111] ASoC: meson: axg-tdm-interface: Fix formatters in trigger" Greg Kroah-Hartman
2024-05-14 10:20 ` [PATCH 5.10 075/111] xfrm: Preserve vlan tags for transport mode software GRO Greg Kroah-Hartman
2024-05-14 10:20 ` [PATCH 5.10 076/111] tcp: defer shutdown(SEND_SHUTDOWN) for TCP_SYN_RECV sockets Greg Kroah-Hartman
2024-05-14 10:20 ` [PATCH 5.10 077/111] tcp: Use refcount_inc_not_zero() in tcp_twsk_unique() Greg Kroah-Hartman
2024-05-14 10:20 ` [PATCH 5.10 078/111] Bluetooth: Fix use-after-free bugs caused by sco_sock_timeout Greg Kroah-Hartman
2024-05-14 10:20 ` [PATCH 5.10 079/111] Bluetooth: l2cap: fix null-ptr-deref in l2cap_chan_timeout Greg Kroah-Hartman
2024-05-14 10:20 ` [PATCH 5.10 080/111] rtnetlink: Correct nested IFLA_VF_VLAN_LIST attribute validation Greg Kroah-Hartman
2024-05-14 10:20 ` [PATCH 5.10 081/111] hwmon: (corsair-cpro) Use a separate buffer for sending commands Greg Kroah-Hartman
2024-05-14 10:20 ` [PATCH 5.10 082/111] hwmon: (corsair-cpro) Use complete_all() instead of complete() in ccp_raw_event() Greg Kroah-Hartman
2024-05-14 10:20 ` [PATCH 5.10 083/111] hwmon: (corsair-cpro) Protect ccp->wait_input_report with a spinlock Greg Kroah-Hartman
2024-05-14 10:20 ` [PATCH 5.10 084/111] phonet: fix rtm_phonet_notify() skb allocation Greg Kroah-Hartman
2024-05-14 10:20 ` [PATCH 5.10 085/111] kcov: Remove kcov include from sched.h and move it to its users Greg Kroah-Hartman
2024-05-14 10:20 ` [PATCH 5.10 086/111] net: bridge: fix corrupted ethernet header on multicast-to-unicast Greg Kroah-Hartman
2024-05-14 10:20 ` Greg Kroah-Hartman [this message]
2024-05-14 10:20 ` [PATCH 5.10 088/111] net: hns3: use appropriate barrier function after setting a bit value Greg Kroah-Hartman
2024-05-14 10:20 ` [PATCH 5.10 089/111] btrfs: fix kvcalloc() arguments order in btrfs_ioctl_send() Greg Kroah-Hartman
2024-05-14 10:20 ` [PATCH 5.10 090/111] firewire: nosy: ensure user_length is taken into account when fetching packet contents Greg Kroah-Hartman
2024-05-14 10:20 ` [PATCH 5.10 091/111] arm64: dts: qcom: Fix interrupt-map parent address cells Greg Kroah-Hartman
2024-05-14 10:20 ` [PATCH 5.10 092/111] usb: typec: ucsi: Check for notifications after init Greg Kroah-Hartman
2024-05-14 10:20 ` [PATCH 5.10 093/111] usb: typec: ucsi: Fix connector check on init Greg Kroah-Hartman
2024-05-14 10:20 ` [PATCH 5.10 094/111] usb: Fix regression caused by invalid ep0 maxpacket in virtual SuperSpeed device Greg Kroah-Hartman
2024-05-14 10:20 ` [PATCH 5.10 095/111] usb: ohci: Prevent missed ohci interrupts Greg Kroah-Hartman
2024-05-14 10:20 ` [PATCH 5.10 096/111] usb: gadget: composite: fix OS descriptors w_value logic Greg Kroah-Hartman
2024-05-14 10:20 ` [PATCH 5.10 097/111] usb: gadget: f_fs: Fix a race condition when processing setup packets Greg Kroah-Hartman
2024-05-14 10:20 ` [PATCH 5.10 098/111] usb: xhci-plat: Dont include xhci.h Greg Kroah-Hartman
2024-05-14 10:20 ` [PATCH 5.10 099/111] usb: dwc3: core: Prevent phy suspend during init Greg Kroah-Hartman
2024-05-14 10:20 ` [PATCH 5.10 100/111] ALSA: hda/realtek: Fix mute led of HP Laptop 15-da3001TU Greg Kroah-Hartman
2024-05-14 10:20 ` [PATCH 5.10 101/111] iio:imu: adis16475: Fix sync mode setting Greg Kroah-Hartman
2024-05-14 10:20 ` [PATCH 5.10 102/111] iio: accel: mxc4005: Interrupt handling fixes Greg Kroah-Hartman
2024-05-14 10:20 ` [PATCH 5.10 103/111] tipc: fix UAF in error path Greg Kroah-Hartman
2024-05-14 10:20 ` [PATCH 5.10 104/111] net: bcmgenet: synchronize use of bcmgenet_set_rx_mode() Greg Kroah-Hartman
2024-05-14 10:20 ` [PATCH 5.10 105/111] ASoC: tegra: Fix DSPK 16-bit playback Greg Kroah-Hartman
2024-05-14 10:20 ` [PATCH 5.10 106/111] dyndbg: fix old BUG_ON in >control parser Greg Kroah-Hartman
2024-05-14 10:20 ` [PATCH 5.10 107/111] mei: me: add lunar lake point M DID Greg Kroah-Hartman
2024-05-14 10:20 ` [PATCH 5.10 108/111] drm/vmwgfx: Fix invalid reads in fence signaled events Greg Kroah-Hartman
2024-05-14 10:20 ` [PATCH 5.10 109/111] net: fix out-of-bounds access in ops_init Greg Kroah-Hartman
2024-05-14 10:20 ` [PATCH 5.10 110/111] hwmon: (pmbus/ucd9000) Increase delay from 250 to 500us Greg Kroah-Hartman
2024-05-14 10:20 ` [PATCH 5.10 111/111] regulator: core: fix debugfs creation regression Greg Kroah-Hartman
2024-05-14 19:43 ` [PATCH 5.10 000/111] 5.10.217-rc1 review Pavel Machek
2024-05-15 3:17 ` Florian Fainelli
2024-05-15 10:14 ` Naresh Kamboju
2024-05-16 12:31 ` Jon Hunter
2024-05-16 12:38 ` Pavel Machek
2024-05-17 9:22 ` Greg Kroah-Hartman
2024-05-17 9:26 ` Greg Kroah-Hartman
2024-05-16 19:53 ` Shreeya Patel
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