From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, Li Shuang <shuali@redhat.com>,
Xin Long <lucien.xin@gmail.com>,
"David S. Miller" <davem@davemloft.net>
Subject: [PATCH 5.2 15/85] tipc: add NULL pointer check before calling kfree_rcu
Date: Wed, 18 Sep 2019 08:18:33 +0200 [thread overview]
Message-ID: <20190918061234.627889799@linuxfoundation.org> (raw)
In-Reply-To: <20190918061234.107708857@linuxfoundation.org>
From: Xin Long <lucien.xin@gmail.com>
[ Upstream commit 42dec1dbe38239cf91cc1f4df7830c66276ced37 ]
Unlike kfree(p), kfree_rcu(p, rcu) won't do NULL pointer check. When
tipc_nametbl_remove_publ returns NULL, the panic below happens:
BUG: unable to handle kernel NULL pointer dereference at 0000000000000068
RIP: 0010:__call_rcu+0x1d/0x290
Call Trace:
<IRQ>
tipc_publ_notify+0xa9/0x170 [tipc]
tipc_node_write_unlock+0x8d/0x100 [tipc]
tipc_node_link_down+0xae/0x1d0 [tipc]
tipc_node_check_dest+0x3ea/0x8f0 [tipc]
? tipc_disc_rcv+0x2c7/0x430 [tipc]
tipc_disc_rcv+0x2c7/0x430 [tipc]
? tipc_rcv+0x6bb/0xf20 [tipc]
tipc_rcv+0x6bb/0xf20 [tipc]
? ip_route_input_slow+0x9cf/0xb10
tipc_udp_recv+0x195/0x1e0 [tipc]
? tipc_udp_is_known_peer+0x80/0x80 [tipc]
udp_queue_rcv_skb+0x180/0x460
udp_unicast_rcv_skb.isra.56+0x75/0x90
__udp4_lib_rcv+0x4ce/0xb90
ip_local_deliver_finish+0x11c/0x210
ip_local_deliver+0x6b/0xe0
? ip_rcv_finish+0xa9/0x410
ip_rcv+0x273/0x362
Fixes: 97ede29e80ee ("tipc: convert name table read-write lock to RCU")
Reported-by: Li Shuang <shuali@redhat.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/tipc/name_distr.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/net/tipc/name_distr.c
+++ b/net/tipc/name_distr.c
@@ -223,7 +223,8 @@ static void tipc_publ_purge(struct net *
publ->key);
}
- kfree_rcu(p, rcu);
+ if (p)
+ kfree_rcu(p, rcu);
}
/**
next prev parent reply other threads:[~2019-09-18 6:24 UTC|newest]
Thread overview: 94+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-18 6:18 [PATCH 5.2 00/85] 5.2.16-stable review Greg Kroah-Hartman
2019-09-18 6:18 ` [PATCH 5.2 01/85] bridge/mdb: remove wrong use of NLM_F_MULTI Greg Kroah-Hartman
2019-09-18 6:18 ` [PATCH 5.2 02/85] cdc_ether: fix rndis support for Mediatek based smartphones Greg Kroah-Hartman
2019-09-18 6:18 ` [PATCH 5.2 03/85] ipv6: Fix the link time qualifier of ping_v6_proc_exit_net() Greg Kroah-Hartman
2019-09-18 6:18 ` [PATCH 5.2 04/85] isdn/capi: check message length in capi_write() Greg Kroah-Hartman
2019-09-18 6:18 ` [PATCH 5.2 05/85] ixgbe: Fix secpath usage for IPsec TX offload Greg Kroah-Hartman
2019-09-18 6:18 ` [PATCH 5.2 06/85] ixgbevf: Fix secpath usage for IPsec Tx offload Greg Kroah-Hartman
2019-09-18 6:18 ` [PATCH 5.2 07/85] net: Fix null de-reference of device refcount Greg Kroah-Hartman
2019-09-18 6:18 ` [PATCH 5.2 08/85] net: gso: Fix skb_segment splat when splitting gso_size mangled skb having linear-headed frag_list Greg Kroah-Hartman
2019-09-18 6:18 ` [PATCH 5.2 09/85] net: phylink: Fix flow control resolution Greg Kroah-Hartman
2019-09-18 6:18 ` [PATCH 5.2 10/85] net: sched: fix reordering issues Greg Kroah-Hartman
2019-09-18 6:18 ` [PATCH 5.2 11/85] sch_hhf: ensure quantum and hhf_non_hh_weight are non-zero Greg Kroah-Hartman
2019-09-18 6:18 ` [PATCH 5.2 12/85] sctp: Fix the link time qualifier of sctp_ctrlsock_exit() Greg Kroah-Hartman
2019-09-18 6:18 ` [PATCH 5.2 13/85] sctp: use transport pf_retrans in sctp_do_8_2_transport_strike Greg Kroah-Hartman
2019-09-18 6:18 ` [PATCH 5.2 14/85] tcp: fix tcp_ecn_withdraw_cwr() to clear TCP_ECN_QUEUE_CWR Greg Kroah-Hartman
2019-09-18 6:18 ` Greg Kroah-Hartman [this message]
2019-09-18 6:18 ` [PATCH 5.2 16/85] tun: fix use-after-free when register netdev failed Greg Kroah-Hartman
2019-09-18 6:18 ` [PATCH 5.2 17/85] net-ipv6: fix excessive RTF_ADDRCONF flag on ::1/128 local route (and others) Greg Kroah-Hartman
2019-09-18 6:18 ` [PATCH 5.2 18/85] ipv6: addrconf_f6i_alloc - fix non-null pointer check to !IS_ERR() Greg Kroah-Hartman
2019-09-18 6:18 ` [PATCH 5.2 19/85] net: fixed_phy: Add forward declaration for struct gpio_desc; Greg Kroah-Hartman
2019-09-18 6:18 ` [PATCH 5.2 20/85] sctp: fix the missing put_user when dumping transport thresholds Greg Kroah-Hartman
2019-09-18 6:18 ` [PATCH 5.2 21/85] net: sock_map, fix missing ulp check in sock hash case Greg Kroah-Hartman
2019-09-18 6:18 ` [PATCH 5.2 22/85] gpiolib: acpi: Add gpiolib_acpi_run_edge_events_on_boot option and blacklist Greg Kroah-Hartman
2019-09-18 6:18 ` [PATCH 5.2 23/85] gpio: mockup: add missing single_release() Greg Kroah-Hartman
2019-09-18 6:18 ` [PATCH 5.2 24/85] gpio: fix line flag validation in linehandle_create Greg Kroah-Hartman
2019-09-18 6:18 ` [PATCH 5.2 25/85] gpio: fix line flag validation in lineevent_create Greg Kroah-Hartman
2019-09-18 6:18 ` [PATCH 5.2 26/85] Btrfs: fix assertion failure during fsync and use of stale transaction Greg Kroah-Hartman
2019-09-18 6:18 ` [PATCH 5.2 27/85] cgroup: freezer: fix frozen state inheritance Greg Kroah-Hartman
2019-09-18 6:18 ` [PATCH 5.2 28/85] Revert "mmc: bcm2835: Terminate timeout work synchronously" Greg Kroah-Hartman
2019-09-18 6:18 ` [PATCH 5.2 29/85] Revert "mmc: sdhci: Remove unneeded quirk2 flag of O2 SD host controller" Greg Kroah-Hartman
2019-09-18 6:18 ` [PATCH 5.2 30/85] mmc: tmio: Fixup runtime PM management during probe Greg Kroah-Hartman
2019-09-18 6:18 ` [PATCH 5.2 31/85] mmc: tmio: Fixup runtime PM management during remove Greg Kroah-Hartman
2019-09-18 6:18 ` [PATCH 5.2 32/85] drm/lima: fix lima_gem_wait() return value Greg Kroah-Hartman
2019-09-18 6:18 ` [PATCH 5.2 33/85] drm/i915: Limit MST to <= 8bpc once again Greg Kroah-Hartman
2019-09-18 6:18 ` [PATCH 5.2 34/85] drm/i915: Restore relaxed padding (OCL_OOB_SUPPRES_ENABLE) for skl+ Greg Kroah-Hartman
2019-09-18 6:18 ` [PATCH 5.2 35/85] ipc: fix semtimedop for generic 32-bit architectures Greg Kroah-Hartman
2019-09-18 6:18 ` [PATCH 5.2 36/85] ipc: fix sparc64 ipc() wrapper Greg Kroah-Hartman
2019-09-18 6:18 ` [PATCH 5.2 37/85] ixgbe: fix double clean of Tx descriptors with xdp Greg Kroah-Hartman
2019-09-18 6:18 ` [PATCH 5.2 38/85] ixgbe: Prevent u8 wrapping of ITR value to something less than 10us Greg Kroah-Hartman
2019-09-18 6:18 ` [PATCH 5.2 39/85] Revert "rt2800: enable TX_PIN_CFG_LNA_PE_ bits per band" Greg Kroah-Hartman
2019-09-18 6:18 ` [PATCH 5.2 40/85] mt76: mt76x0e: disable 5GHz band for MT7630E Greg Kroah-Hartman
2019-09-18 6:18 ` [PATCH 5.2 41/85] genirq: Prevent NULL pointer dereference in resend_irqs() Greg Kroah-Hartman
2019-09-18 6:19 ` [PATCH 5.2 42/85] regulator: twl: voltage lists for vdd1/2 on twl4030 Greg Kroah-Hartman
2019-09-18 6:19 ` [PATCH 5.2 43/85] KVM: s390: kvm_s390_vm_start_migration: check dirty_bitmap before using it as target for memset() Greg Kroah-Hartman
2019-09-18 6:19 ` [PATCH 5.2 44/85] KVM: s390: Do not leak kernel stack data in the KVM_S390_INTERRUPT ioctl Greg Kroah-Hartman
2019-09-18 6:19 ` [PATCH 5.2 45/85] KVM: x86: work around leak of uninitialized stack contents Greg Kroah-Hartman
2019-09-18 6:19 ` [PATCH 5.2 46/85] KVM: x86/mmu: Reintroduce fast invalidate/zap for flushing memslot Greg Kroah-Hartman
2019-09-18 6:19 ` [PATCH 5.2 47/85] KVM: nVMX: handle page fault in vmread Greg Kroah-Hartman
2019-09-18 6:19 ` [PATCH 5.2 48/85] x86/purgatory: Change compiler flags from -mcmodel=kernel to -mcmodel=large to fix kexec relocation errors Greg Kroah-Hartman
2019-09-18 6:19 ` [PATCH 5.2 49/85] powerpc: Add barrier_nospec to raw_copy_in_user() Greg Kroah-Hartman
2019-09-18 6:19 ` [PATCH 5.2 50/85] kernel/module: Fix mem leak in module_add_modinfo_attrs Greg Kroah-Hartman
2019-09-18 6:19 ` [PATCH 5.2 51/85] x86/boot: Use efi_setup_data for searching RSDP on kexec-ed kernels Greg Kroah-Hartman
2019-09-18 6:19 ` [PATCH 5.2 52/85] x86/ima: check EFI SetupMode too Greg Kroah-Hartman
2019-09-18 6:19 ` [PATCH 5.2 53/85] drm/meson: Add support for XBGR8888 & ABGR8888 formats Greg Kroah-Hartman
2019-09-18 6:19 ` [PATCH 5.2 54/85] clk: Fix debugfs clk_possible_parents for clks without parent string names Greg Kroah-Hartman
2019-09-18 6:19 ` [PATCH 5.2 55/85] clk: Simplify debugfs printing and add a newline Greg Kroah-Hartman
2019-09-18 6:19 ` [PATCH 5.2 56/85] mt76: Fix a signedness bug in mt7615_add_interface() Greg Kroah-Hartman
2019-09-18 6:19 ` [PATCH 5.2 57/85] mt76: mt7615: Use after free in mt7615_mcu_set_bcn() Greg Kroah-Hartman
2019-09-18 6:19 ` [PATCH 5.2 58/85] clk: rockchip: Dont yell about bad mmc phases when getting Greg Kroah-Hartman
2019-09-18 6:19 ` [PATCH 5.2 59/85] mtd: rawnand: mtk: Fix wrongly assigned OOB buffer pointer issue Greg Kroah-Hartman
2019-09-18 6:19 ` [PATCH 5.2 60/85] PCI: Always allow probing with driver_override Greg Kroah-Hartman
2019-09-18 6:19 ` [PATCH 5.2 61/85] ubifs: Correctly use tnc_next() in search_dh_cookie() Greg Kroah-Hartman
2019-09-18 6:19 ` [PATCH 5.2 62/85] driver core: Fix use-after-free and double free on glue directory Greg Kroah-Hartman
2019-09-18 6:19 ` [PATCH 5.2 63/85] crypto: talitos - check AES key size Greg Kroah-Hartman
2019-09-18 6:19 ` [PATCH 5.2 64/85] crypto: talitos - fix CTR alg blocksize Greg Kroah-Hartman
2019-09-18 6:19 ` [PATCH 5.2 65/85] crypto: talitos - check data blocksize in ablkcipher Greg Kroah-Hartman
2019-09-18 6:19 ` [PATCH 5.2 66/85] crypto: talitos - fix ECB algs ivsize Greg Kroah-Hartman
2019-09-18 6:19 ` [PATCH 5.2 67/85] crypto: talitos - Do not modify req->cryptlen on decryption Greg Kroah-Hartman
2019-09-18 6:19 ` [PATCH 5.2 68/85] crypto: talitos - HMAC SNOOP NO AFEU mode requires SW icv checking Greg Kroah-Hartman
2019-09-18 6:19 ` [PATCH 5.2 69/85] firmware: ti_sci: Always request response from firmware Greg Kroah-Hartman
2019-09-18 6:19 ` [PATCH 5.2 70/85] drm: panel-orientation-quirks: Add extra quirk table entry for GPD MicroPC Greg Kroah-Hartman
2019-09-18 6:19 ` [PATCH 5.2 71/85] drm/mediatek: mtk_drm_drv.c: Add of_node_put() before goto Greg Kroah-Hartman
2019-09-18 6:19 ` [PATCH 5.2 72/85] mm/z3fold.c: remove z3fold_migration trylock Greg Kroah-Hartman
2019-09-18 6:19 ` [PATCH 5.2 73/85] mm/z3fold.c: fix lock/unlock imbalance in z3fold_page_isolate Greg Kroah-Hartman
2019-09-18 6:19 ` [PATCH 5.2 74/85] Revert "Bluetooth: btusb: driver to enable the usb-wakeup feature" Greg Kroah-Hartman
2019-09-18 6:19 ` [PATCH 5.2 75/85] iio: adc: stm32-dfsdm: fix output resolution Greg Kroah-Hartman
2019-09-18 6:19 ` [PATCH 5.2 76/85] iio: adc: stm32-dfsdm: fix data type Greg Kroah-Hartman
2019-09-18 6:19 ` [PATCH 5.2 77/85] modules: fix BUG when load module with rodata=n Greg Kroah-Hartman
2019-09-18 6:19 ` [PATCH 5.2 78/85] modules: fix compile error if dont have strict module rwx Greg Kroah-Hartman
2019-09-18 6:19 ` [PATCH 5.2 79/85] modules: always page-align module section allocations Greg Kroah-Hartman
2019-09-18 6:19 ` [PATCH 5.2 80/85] kvm: nVMX: Remove unnecessary sync_roots from handle_invept Greg Kroah-Hartman
2019-09-18 6:19 ` [PATCH 5.2 81/85] KVM: SVM: Fix detection of AMD Errata 1096 Greg Kroah-Hartman
2019-09-18 6:19 ` [PATCH 5.2 82/85] platform/x86: pmc_atom: Add CB4063 Beckhoff Automation board to critclk_systems DMI table Greg Kroah-Hartman
2019-09-18 6:19 ` [PATCH 5.2 83/85] platform/x86: pcengines-apuv2: use KEY_RESTART for front button Greg Kroah-Hartman
2019-09-18 6:19 ` [PATCH 5.2 84/85] rsi: fix a double free bug in rsi_91x_deinit() Greg Kroah-Hartman
2019-09-18 6:19 ` [PATCH 5.2 85/85] x86/build: Add -Wnoaddress-of-packed-member to REALMODE_CFLAGS, to silence GCC9 build warning Greg Kroah-Hartman
2019-09-18 11:59 ` [PATCH 5.2 00/85] 5.2.16-stable review kernelci.org bot
2019-09-18 15:17 ` Naresh Kamboju
2019-09-19 6:37 ` Greg Kroah-Hartman
2019-09-18 16:28 ` Jon Hunter
2019-09-19 6:37 ` Greg Kroah-Hartman
2019-09-18 19:38 ` Guenter Roeck
2019-09-19 1:22 ` shuah
2019-09-19 6:36 ` Greg Kroah-Hartman
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