From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Eric Dumazet <edumazet@google.com>,
syzbot <syzkaller@googlegroups.com>,
Sven Eckelmann <sven@narfation.org>,
Simon Wunderlich <sw@simonwunderlich.de>,
Sasha Levin <sashal@kernel.org>,
netdev@vger.kernel.org
Subject: [PATCH AUTOSEL 5.2 18/94] batman-adv: fix uninit-value in batadv_netlink_get_ifindex()
Date: Wed, 4 Sep 2019 11:56:23 -0400 [thread overview]
Message-ID: <20190904155739.2816-18-sashal@kernel.org> (raw)
In-Reply-To: <20190904155739.2816-1-sashal@kernel.org>
From: Eric Dumazet <edumazet@google.com>
[ Upstream commit 3ee1bb7aae97324ec9078da1f00cb2176919563f ]
batadv_netlink_get_ifindex() needs to make sure user passed
a correct u32 attribute.
syzbot reported :
BUG: KMSAN: uninit-value in batadv_netlink_dump_hardif+0x70d/0x880 net/batman-adv/netlink.c:968
CPU: 1 PID: 11705 Comm: syz-executor888 Not tainted 5.1.0+ #1
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x191/0x1f0 lib/dump_stack.c:113
kmsan_report+0x130/0x2a0 mm/kmsan/kmsan.c:622
__msan_warning+0x75/0xe0 mm/kmsan/kmsan_instr.c:310
batadv_netlink_dump_hardif+0x70d/0x880 net/batman-adv/netlink.c:968
genl_lock_dumpit+0xc6/0x130 net/netlink/genetlink.c:482
netlink_dump+0xa84/0x1ab0 net/netlink/af_netlink.c:2253
__netlink_dump_start+0xa3a/0xb30 net/netlink/af_netlink.c:2361
genl_family_rcv_msg net/netlink/genetlink.c:550 [inline]
genl_rcv_msg+0xfc1/0x1a40 net/netlink/genetlink.c:627
netlink_rcv_skb+0x431/0x620 net/netlink/af_netlink.c:2486
genl_rcv+0x63/0x80 net/netlink/genetlink.c:638
netlink_unicast_kernel net/netlink/af_netlink.c:1311 [inline]
netlink_unicast+0xf3e/0x1020 net/netlink/af_netlink.c:1337
netlink_sendmsg+0x127e/0x12f0 net/netlink/af_netlink.c:1926
sock_sendmsg_nosec net/socket.c:651 [inline]
sock_sendmsg net/socket.c:661 [inline]
___sys_sendmsg+0xcc6/0x1200 net/socket.c:2260
__sys_sendmsg net/socket.c:2298 [inline]
__do_sys_sendmsg net/socket.c:2307 [inline]
__se_sys_sendmsg+0x305/0x460 net/socket.c:2305
__x64_sys_sendmsg+0x4a/0x70 net/socket.c:2305
do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:291
entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x440209
Fixes: b60620cf567b ("batman-adv: netlink: hardif query")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
net/batman-adv/netlink.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/batman-adv/netlink.c b/net/batman-adv/netlink.c
index a67720fad46ca..fdbd9f4c976b4 100644
--- a/net/batman-adv/netlink.c
+++ b/net/batman-adv/netlink.c
@@ -164,7 +164,7 @@ batadv_netlink_get_ifindex(const struct nlmsghdr *nlh, int attrtype)
{
struct nlattr *attr = nlmsg_find_attr(nlh, GENL_HDRLEN, attrtype);
- return attr ? nla_get_u32(attr) : 0;
+ return (attr && nla_len(attr) == sizeof(u32)) ? nla_get_u32(attr) : 0;
}
/**
--
2.20.1
next prev parent reply other threads:[~2019-09-04 15:58 UTC|newest]
Thread overview: 95+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-04 15:56 [PATCH AUTOSEL 5.2 01/94] ieee802154: hwsim: Fix error handle path in hwsim_init_module Sasha Levin
2019-09-04 15:56 ` [PATCH AUTOSEL 5.2 02/94] ieee802154: hwsim: unregister hw while hwsim_subscribe_all_others fails Sasha Levin
2019-09-04 15:56 ` [PATCH AUTOSEL 5.2 03/94] ARM: dts: am57xx: Disable voltage switching for SD card Sasha Levin
2019-09-04 15:56 ` [PATCH AUTOSEL 5.2 04/94] ARM: OMAP2+: Fix missing SYSC_HAS_RESET_STATUS for dra7 epwmss Sasha Levin
2019-09-04 15:56 ` [PATCH AUTOSEL 5.2 05/94] bus: ti-sysc: Fix handling of forced idle Sasha Levin
2019-09-04 15:56 ` [PATCH AUTOSEL 5.2 06/94] bus: ti-sysc: Fix using configured sysc mask value Sasha Levin
2019-09-04 15:56 ` [PATCH AUTOSEL 5.2 07/94] ARM: dts: Fix flags for gpio7 Sasha Levin
2019-09-04 15:56 ` [PATCH AUTOSEL 5.2 08/94] ARM: dts: Fix incorrect dcan register mapping for am3, am4 and dra7 Sasha Levin
2019-09-04 15:56 ` [PATCH AUTOSEL 5.2 09/94] arm64: dts: meson-g12a: add missing dwc2 phy-names Sasha Levin
2019-09-04 15:56 ` [PATCH AUTOSEL 5.2 10/94] s390/bpf: fix lcgr instruction encoding Sasha Levin
2019-09-04 15:56 ` [PATCH AUTOSEL 5.2 11/94] ARM: OMAP2+: Fix omap4 errata warning on other SoCs Sasha Levin
2019-09-04 15:56 ` [PATCH AUTOSEL 5.2 12/94] ARM: dts: am335x: Fix UARTs length Sasha Levin
2019-09-04 15:56 ` [PATCH AUTOSEL 5.2 13/94] ARM: dts: dra74x: Fix iodelay configuration for mmc3 Sasha Levin
2019-09-04 15:56 ` [PATCH AUTOSEL 5.2 14/94] ARM: OMAP1: ams-delta-fiq: Fix missing irq_ack Sasha Levin
2019-09-04 15:56 ` [PATCH AUTOSEL 5.2 15/94] bus: ti-sysc: Simplify cleanup upon failures in sysc_probe() Sasha Levin
2019-09-04 15:56 ` [PATCH AUTOSEL 5.2 16/94] ARM: dts: Fix incomplete dts data for am3 and am4 mmc Sasha Levin
2019-09-04 15:56 ` [PATCH AUTOSEL 5.2 17/94] s390/bpf: use 32-bit index for tail calls Sasha Levin
2019-09-04 15:56 ` Sasha Levin [this message]
2019-09-04 15:56 ` [PATCH AUTOSEL 5.2 19/94] selftests/bpf: fix "bind{4, 6} deny specific IP & port" on s390 Sasha Levin
2019-09-04 15:56 ` [PATCH AUTOSEL 5.2 20/94] tools: bpftool: close prog FD before exit on showing a single program Sasha Levin
2019-09-04 15:56 ` [PATCH AUTOSEL 5.2 21/94] fpga: altera-ps-spi: Fix getting of optional confd gpio Sasha Levin
2019-09-04 15:56 ` [PATCH AUTOSEL 5.2 22/94] netfilter: ebtables: Fix argument order to ADD_COUNTER Sasha Levin
2019-09-04 15:56 ` [PATCH AUTOSEL 5.2 23/94] netfilter: nft_flow_offload: missing netlink attribute policy Sasha Levin
2019-09-04 15:56 ` [PATCH AUTOSEL 5.2 24/94] netfilter: xt_nfacct: Fix alignment mismatch in xt_nfacct_match_info Sasha Levin
2019-09-04 15:56 ` [PATCH AUTOSEL 5.2 25/94] NFSv4: Fix return values for nfs4_file_open() Sasha Levin
2019-09-04 15:56 ` [PATCH AUTOSEL 5.2 26/94] NFSv4: Fix return value in nfs_finish_open() Sasha Levin
2019-09-04 15:56 ` [PATCH AUTOSEL 5.2 27/94] NFS: Fix initialisation of I/O result struct in nfs_pgio_rpcsetup Sasha Levin
2019-09-04 15:56 ` [PATCH AUTOSEL 5.2 28/94] NFS: On fatal writeback errors, we need to call nfs_inode_remove_request() Sasha Levin
2019-09-04 15:56 ` [PATCH AUTOSEL 5.2 29/94] Kconfig: Fix the reference to the IDT77105 Phy driver in the description of ATM_NICSTAR_USE_IDT77105 Sasha Levin
2019-09-04 15:56 ` [PATCH AUTOSEL 5.2 30/94] xdp: unpin xdp umem pages in error path Sasha Levin
2019-09-04 15:56 ` [PATCH AUTOSEL 5.2 31/94] selftests/bpf: fix test_cgroup_storage on s390 Sasha Levin
2019-09-04 15:56 ` [PATCH AUTOSEL 5.2 32/94] selftests/bpf: add config fragment BPF_JIT Sasha Levin
2019-09-04 15:56 ` [PATCH AUTOSEL 5.2 33/94] selftests/bpf: install files test_xdp_vlan.sh Sasha Levin
2019-09-04 15:56 ` [PATCH AUTOSEL 5.2 34/94] qed: Add cleanup in qed_slowpath_start() Sasha Levin
2019-09-04 15:56 ` [PATCH AUTOSEL 5.2 35/94] drm/omap: Fix port lookup for SDI output Sasha Levin
2019-09-04 15:56 ` [PATCH AUTOSEL 5.2 36/94] drm/virtio: use virtio_max_dma_size Sasha Levin
2019-09-04 15:56 ` [PATCH AUTOSEL 5.2 37/94] ARM: 8874/1: mm: only adjust sections of valid mm structures Sasha Levin
2019-09-04 15:56 ` [PATCH AUTOSEL 5.2 38/94] batman-adv: Only read OGM tvlv_len after buffer len check Sasha Levin
2019-09-04 15:56 ` [PATCH AUTOSEL 5.2 39/94] batman-adv: Only read OGM2 " Sasha Levin
2019-09-04 15:56 ` [PATCH AUTOSEL 5.2 40/94] flow_dissector: Fix potential use-after-free on BPF_PROG_DETACH Sasha Levin
2019-09-04 15:56 ` [PATCH AUTOSEL 5.2 41/94] bpf: fix use after free in prog symbol exposure Sasha Levin
2019-09-04 15:56 ` [PATCH AUTOSEL 5.2 42/94] bpf: allow narrow loads of some sk_reuseport_md fields with offset > 0 Sasha Levin
2019-09-04 15:56 ` [PATCH AUTOSEL 5.2 43/94] r8152: Set memory to all 0xFFs on failed reg reads Sasha Levin
2019-09-04 15:56 ` [PATCH AUTOSEL 5.2 44/94] x86/apic: Fix arch_dynirq_lower_bound() bug for DT enabled machines Sasha Levin
2019-09-04 15:56 ` [PATCH AUTOSEL 5.2 45/94] SUNRPC: Handle EADDRINUSE and ENOBUFS correctly Sasha Levin
2019-09-04 15:56 ` [PATCH AUTOSEL 5.2 46/94] SUNRPC: Handle connection breakages correctly in call_status() Sasha Levin
2019-09-04 15:56 ` [PATCH AUTOSEL 5.2 47/94] pNFS/flexfiles: Don't time out requests on hard mounts Sasha Levin
2019-09-04 15:56 ` [PATCH AUTOSEL 5.2 48/94] NFS: Fix spurious EIO read errors Sasha Levin
2019-09-04 15:56 ` [PATCH AUTOSEL 5.2 49/94] NFS: Fix writepage(s) error handling to not report errors twice Sasha Levin
2019-09-04 15:56 ` [PATCH AUTOSEL 5.2 50/94] drm/amdgpu: fix dma_fence_wait without reference Sasha Levin
2019-09-04 15:56 ` [PATCH AUTOSEL 5.2 51/94] netfilter: xt_physdev: Fix spurious error message in physdev_mt_check Sasha Levin
2019-09-04 15:56 ` [PATCH AUTOSEL 5.2 52/94] netfilter: nf_conntrack_ftp: Fix debug output Sasha Levin
2019-09-04 15:56 ` [PATCH AUTOSEL 5.2 53/94] NFSv2: Fix eof handling Sasha Levin
2019-09-04 15:56 ` [PATCH AUTOSEL 5.2 54/94] NFSv2: Fix write regression Sasha Levin
2019-09-04 15:57 ` [PATCH AUTOSEL 5.2 55/94] NFS: remove set but not used variable 'mapping' Sasha Levin
2019-09-04 15:57 ` [PATCH AUTOSEL 5.2 56/94] kallsyms: Don't let kallsyms_lookup_size_offset() fail on retrieving the first symbol Sasha Levin
2019-09-04 15:57 ` [PATCH AUTOSEL 5.2 57/94] netfilter: conntrack: make sysctls per-namespace again Sasha Levin
2019-09-04 15:57 ` [PATCH AUTOSEL 5.2 58/94] drm/amd/powerplay: correct Vega20 dpm level related settings Sasha Levin
2019-09-04 15:57 ` [PATCH AUTOSEL 5.2 59/94] cifs: set domainName when a domain-key is used in multiuser Sasha Levin
2019-09-04 15:57 ` [PATCH AUTOSEL 5.2 60/94] cifs: Use kzfree() to zero out the password Sasha Levin
2019-09-04 15:57 ` [PATCH AUTOSEL 5.2 61/94] Add genphy_c45_config_aneg() function to phy-c45.c Sasha Levin
2019-09-04 15:57 ` [PATCH AUTOSEL 5.2 62/94] libceph: don't call crypto_free_sync_skcipher() on a NULL tfm Sasha Levin
2019-09-04 15:57 ` [PATCH AUTOSEL 5.2 63/94] x86/build: Add -Wnoaddress-of-packed-member to REALMODE_CFLAGS, to silence GCC9 build warning Sasha Levin
2019-09-04 15:57 ` [PATCH AUTOSEL 5.2 64/94] usb: host: xhci-tegra: Set DMA mask correctly Sasha Levin
2019-09-04 15:57 ` [PATCH AUTOSEL 5.2 65/94] RISC-V: Fix FIXMAP area corruption on RV32 systems Sasha Levin
2019-09-04 15:57 ` [PATCH AUTOSEL 5.2 66/94] ARM: 8901/1: add a criteria for pfn_valid of arm Sasha Levin
2019-09-04 15:57 ` [PATCH AUTOSEL 5.2 67/94] ibmvnic: Do not process reset during or after device removal Sasha Levin
2019-09-04 15:57 ` [PATCH AUTOSEL 5.2 68/94] nfp: flower: handle neighbour events on internal ports Sasha Levin
2019-09-04 15:57 ` [PATCH AUTOSEL 5.2 69/94] sky2: Disable MSI on yet another ASUS boards (P6Xxxx) Sasha Levin
2019-09-04 15:57 ` [PATCH AUTOSEL 5.2 70/94] i2c: designware: Synchronize IRQs when unregistering slave client Sasha Levin
2019-09-04 15:57 ` [PATCH AUTOSEL 5.2 71/94] perf/x86/intel: Restrict period on Nehalem Sasha Levin
2019-09-04 15:57 ` [PATCH AUTOSEL 5.2 72/94] perf/x86/amd/ibs: Fix sample bias for dispatched micro-ops Sasha Levin
2019-09-04 15:57 ` [PATCH AUTOSEL 5.2 73/94] i2c: iproc: Stop advertising support of SMBUS quick cmd Sasha Levin
2019-09-04 15:57 ` [PATCH AUTOSEL 5.2 74/94] i2c: mediatek: disable zero-length transfers for mt8183 Sasha Levin
2019-09-04 15:57 ` [PATCH AUTOSEL 5.2 75/94] amd-xgbe: Fix error path in xgbe_mod_init() Sasha Levin
2019-09-04 15:57 ` [PATCH AUTOSEL 5.2 76/94] net: stmmac: dwmac-rk: Don't fail if phy regulator is absent Sasha Levin
2019-09-04 15:57 ` [PATCH AUTOSEL 5.2 77/94] netfilter: nf_flow_table: fix offload for flows that are subject to xfrm Sasha Levin
2019-09-04 15:57 ` [PATCH AUTOSEL 5.2 78/94] netfilter: nf_flow_table: clear skb tstamp before xmit Sasha Levin
2019-09-04 15:57 ` [PATCH AUTOSEL 5.2 79/94] tools/power x86_energy_perf_policy: Fix "uninitialized variable" warnings at -O2 Sasha Levin
2019-09-04 15:57 ` [PATCH AUTOSEL 5.2 80/94] tools/power x86_energy_perf_policy: Fix argument parsing Sasha Levin
2019-09-04 15:57 ` [PATCH AUTOSEL 5.2 81/94] tools/power turbostat: fix leak of file descriptor on error return path Sasha Levin
2019-09-04 15:57 ` [PATCH AUTOSEL 5.2 82/94] tools/power turbostat: fix file descriptor leaks Sasha Levin
2019-09-05 17:00 ` Brown, Len
2019-09-04 15:57 ` [PATCH AUTOSEL 5.2 83/94] tools/power turbostat: fix buffer overrun Sasha Levin
2019-09-04 15:57 ` [PATCH AUTOSEL 5.2 84/94] tools/power turbostat: Fix Haswell Core systems Sasha Levin
2019-09-04 15:57 ` [PATCH AUTOSEL 5.2 85/94] tools/power turbostat: Add Ice Lake NNPI support Sasha Levin
2019-09-04 15:57 ` [PATCH AUTOSEL 5.2 86/94] tools/power turbostat: Fix CPU%C1 display value Sasha Levin
2019-09-04 15:57 ` [PATCH AUTOSEL 5.2 87/94] net: aquantia: fix removal of vlan 0 Sasha Levin
2019-09-04 15:57 ` [PATCH AUTOSEL 5.2 88/94] net: aquantia: fix limit of vlan filters Sasha Levin
2019-09-04 15:57 ` [PATCH AUTOSEL 5.2 89/94] net: aquantia: reapply vlan filters on up Sasha Levin
2019-09-04 15:57 ` [PATCH AUTOSEL 5.2 90/94] net: aquantia: linkstate irq should be oneshot Sasha Levin
2019-09-04 15:57 ` [PATCH AUTOSEL 5.2 91/94] net: aquantia: fix out of memory condition on rx side Sasha Levin
2019-09-04 15:57 ` [PATCH AUTOSEL 5.2 92/94] net: dsa: microchip: add KSZ8563 compatibility string Sasha Levin
2019-09-04 15:57 ` [PATCH AUTOSEL 5.2 93/94] enetc: Add missing call to 'pci_free_irq_vectors()' in probe and remove functions Sasha Levin
2019-09-04 15:57 ` [PATCH AUTOSEL 5.2 94/94] net: seeq: Fix the function used to release some memory in an error handling path Sasha Levin
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