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Development version of the Upstream MultiPath TCP Linux kernel 🐧
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syzkaller: WARNING in `__mptcp_move_skbs_from_subflow` #450

Closed cpaasch closed 1 year ago

cpaasch commented 1 year ago

syzkaller-id: 7bc336bf049b8e3d7efa860b71901d5e094b33ac

HEAD: cd8bdf563d46

Trace:

------------[ cut here ]------------
WARNING: CPU: 0 PID: 9696 at net/mptcp/protocol.c:705 __mptcp_move_skbs_from_subflow+0x2604/0x26e0
Modules linked in:
CPU: 0 PID: 9696 Comm: syz-executor.7 Not tainted 6.6.0-rc5-gcd8bdf563d46 #45
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.11.0-2.el7 04/01/2014
netlink: 8 bytes leftover after parsing attributes in process `syz-executor.4'.
RIP: 0010:__mptcp_move_skbs_from_subflow+0x2604/0x26e0 net/mptcp/protocol.c:705
Code: 00 00 48 3b 84 24 40 02 00 00 0f 85 ee 00 00 00 89 d8 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc e8 fc b7 59 fd <0f> 0b e9 6b ff ff ff e8 f0 b7 59 fd 43 0f b6 04 2c 84 c0 0f 85 88
RSP: 0018:ffffc90000006e80 EFLAGS: 00010246
RAX: ffffffff83e9f674 RBX: ffff88802f45d870 RCX: ffff888102ad0000
netlink: 8 bytes leftover after parsing attributes in process `syz-executor.4'.
RDX: 0000000080000303 RSI: 0000000000013908 RDI: 0000000000003908
RBP: ffffc90000007110 R08: ffffffff83e9e078 R09: 1ffff1100e548c8a
R10: dffffc0000000000 R11: ffffed100e548c8b R12: 0000000000013908
R13: dffffc0000000000 R14: 0000000000003908 R15: 000000000031cf29
FS:  00007f239c47e700(0000) GS:ffff88811b200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f239c45cd78 CR3: 000000006a66c006 CR4: 0000000000770ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
PKRU: 55555554
Call Trace:
 <IRQ>
netlink: 8 bytes leftover after parsing attributes in process `syz-executor.4'.
netlink: 8 bytes leftover after parsing attributes in process `syz-executor.4'.
netlink: 8 bytes leftover after parsing attributes in process `syz-executor.4'.
 mptcp_data_ready+0x263/0xac0 net/mptcp/protocol.c:819
 subflow_data_ready+0x268/0x6d0 net/mptcp/subflow.c:1409
 tcp_data_queue+0x21a1/0x7a60 net/ipv4/tcp_input.c:5151
 tcp_rcv_established+0x950/0x1d90 net/ipv4/tcp_input.c:6098
 tcp_v6_do_rcv+0x554/0x12f0 net/ipv6/tcp_ipv6.c:1483
 tcp_v6_rcv+0x2e26/0x3810 net/ipv6/tcp_ipv6.c:1749
 ip6_protocol_deliver_rcu+0xd6b/0x1ae0 net/ipv6/ip6_input.c:438
 ip6_input+0x1c5/0x470 net/ipv6/ip6_input.c:483
 ipv6_rcv+0xef/0x2c0 include/linux/netfilter.h:304
 __netif_receive_skb+0x1ea/0x6a0 net/core/dev.c:5532
 process_backlog+0x353/0x660 net/core/dev.c:5974
 __napi_poll+0xc6/0x5a0 net/core/dev.c:6536
 net_rx_action+0x6a0/0xfd0 net/core/dev.c:6603
 __do_softirq+0x184/0x524 kernel/softirq.c:553
 do_softirq+0xdd/0x130 kernel/softirq.c:454
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0x7b/0x80 kernel/softirq.c:381
 local_bh_enable include/linux/bottom_half.h:33 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:819 [inline]
 __dev_queue_xmit+0x133b/0x33c0 net/core/dev.c:4376
 dev_queue_xmit include/linux/netdevice.h:3085 [inline]
 neigh_hh_output include/net/neighbour.h:526 [inline]
 neigh_output include/net/neighbour.h:540 [inline]
 ip6_finish_output2+0xeef/0x1760 net/ipv6/ip6_output.c:135
 ip6_output+0x207/0x530 include/linux/netfilter.h:293
 ip6_xmit+0xe66/0x19f0 include/net/dst.h:458
 inet6_csk_xmit+0x2dc/0x450 net/ipv6/inet6_connection_sock.c:135
 __tcp_transmit_skb+0x1e61/0x34a0 net/ipv4/tcp_output.c:1408
 tcp_write_xmit+0x178d/0x63f0 net/ipv4/tcp_output.c:1426
 __tcp_push_pending_frames+0x95/0x2f0 net/ipv4/tcp_output.c:2928
 __mptcp_push_pending+0x4eb/0x910 net/mptcp/protocol.c:1485
 mptcp_sendmsg+0x12bd/0x1600 net/mptcp/protocol.c:1886
 __sock_sendmsg+0xa7/0x230 net/socket.c:730
 ____sys_sendmsg+0x507/0x7b0 net/socket.c:2558
 ___sys_sendmsg+0x238/0x2c0 net/socket.c:2612
 __sys_sendmmsg+0x276/0x4d0 net/socket.c:2698
 __do_sys_sendmmsg net/socket.c:2727 [inline]
 __se_sys_sendmmsg net/socket.c:2724 [inline]
 __x64_sys_sendmmsg+0xa0/0xb0 net/socket.c:2724
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x45/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x6e/0xd8
RIP: 0033:0x45c4f9
Code: fc ff 48 81 c4 80 00 00 00 e9 f1 fe ff ff 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 eb 3c fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f239c47dc18 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 000000000079c050 RCX: 000000000045c4f9
RDX: 0000000000000003 RSI: 0000000020001540 RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000079c05c
R13: 0000000000021000 R14: 000000000079c050 R15: 00007f239c47e700
 </TASK>
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------

Kconfig: Kconfig_k9_kasan.txt

Reproducer:

# {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:namespace SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:false Repro:false Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}
r0 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r0, &(0x7f0000000200)={0x0, 0x0, &(0x7f00000001c0)={&(0x7f0000000000)=@newlink={0x30, 0x10, 0x1, 0x0, 0x0, {}, [@IFLA_GROUP={0x8}, @IFLA_GSO_MAX_SIZE={0x8, 0x29, 0x7adaa}]}, 0x30}}, 0x0)
sendmmsg$inet(0xffffffffffffffff, 0x0, 0x0, 0xc001)
r1 = socket$inet6_mptcp(0xa, 0x1, 0x106)
bind$inet6(r1, &(0x7f0000000180)={0xa, 0x4e23, 0x0, @loopback}, 0x1c)
listen(r1, 0x0)
r2 = socket$inet6_mptcp(0xa, 0x1, 0x106)
connect$inet6(r2, &(0x7f00000000c0)={0xa, 0x4e23, 0x0, @loopback}, 0x63)
r3 = accept(r1, 0x0, 0x0)
recvfrom$inet6(r2, &(0x7f0000000700)=""/76, 0xe75a, 0x0, 0x0, 0x0)
sendmmsg$unix(r3, &(0x7f0000001540)=[{{0x0, 0x0, &(0x7f0000000580)=[{&(0x7f0000001c80)="e0a8985994af1767d52b44ee04125a1414e3a5fa6e85630cfcc6e0b6a0e6c201d876f0a55c20650abcd110f5c3a5d22ef08c6e01733dac21c02b29d465826372804711dcbf8725c3213d7c86c3b8b74696563c8a17f9e936e283927ef877ef6884a4acdf36c67de9b12c65fa7afdd5faaf19f9274ae022d9cb3b18693449c6c7a4b6f8220834441024ea32460b8161e7c9bc71253b9068932020611f41c87881d7156395d2fbd8ed0f80e107c9894679c4b38fc68cd4589c723954674c434b7deea70bee841931dce9a972381e6328fb681271d07ab96db8abe33625e4f0fa298d5e1f2cfc10054c9343eefa2c23018641774eb079a816f8bf4a0f454052047241cea63b6635d03661148e5f90a05cc9a8f45d68e03788483c6bd9f44248ac03770c02668533d0670dd7809ec35d01a6308a08f44b883e37189a897a0c994e2b60cf964dc062e7edc18b5dcc051d5681e9580433a7555ec1b97612208cdf3e89c0afa2765ef20a83698edb4714bf6286519333381a1a612ee9dcbff6d716ae5ed48bc49a5523364e6b6a47ed3ee84db1488013b4aa8bdb9bd518799e16c61cb60957f9d824b64eb62121865d6a991075b42b3c8f474bfa405ec108da0de5068c1f6dc175c57bc23916b2ff33dca13f26841fae1f94f73d7bec1a19831495e92ed9d1c826bd54ed53ead3b62dc68eebbb80e41fc988f4775b017ed77980cd4612186b714b7bb8262a5bef177adfcda267fef6c554bf6d8c3fd1e654ec7626c69478ccd0f8456739b1821a288194eab31a1269a9962525247f52ea1c57104edf8668cadb58cac2ea656035bac0f71278765fecbd595f1183d3eae508801f2df4372981b198e2bebd34edfe651633e7f4536c65a911fcc1fe074949457c2dd6c13bfd4138905880241e00f9d1829ca9459eea428d38d70145f77a943fac6fa15bcef85a5cd23bd04ffdd9529e3d56cd0cb30c45e211d20ded313ab39f7ed45a02941a600a7256c534ac6dc4bc82d8e2e0b6a519940b55e7548e742f1c337ca268e3dd7d42b654d80862651f612505757db3eb4bf603b625e70e734bf3f7f53e10c3d0e379f2c460e286dbe385a102c7470ac6a732fe1fd3559963af5764bd2b4b910f0ae54a6df04a76e9431e72509f212fa6e99d4bb1b320e595b93f0d728f1341793196a5a72b72b7c340e5497a11d520fdb67b5501e1bbaab0707bfb13fb85ba450628248f2f47e5e7794599207bf79c2c86ea91cf6b07faa0c6f2a85edfea6b5f6fcc2f44cd290bdecae708da2e7cf1c50535831896b73db88974de1cebd5a56e81904e9abfee0683d86145cac6234427fc8d03289a920874eb732a1c9556cc62aebc4004dd9056bf16fab33e37e053284e98248cb7f41e892cbb93998741b4426ab3ea2f8c36c0f8bc1c5a1cca54b163f031ed422f74de7adfbd77eb212c860be5231aba04db092ff9a95d9105b4c4ee0d73c13ebfa14048e4bd938609536778871cf779e20d6b4b63e33405fd52d0b0bd2a7941ab6b369002c7320839cefa006f105a9f9f060ab94ce6069c5e4a942599fb1e9a1f8674359bba6616c023ed8c6f01f60e280b1699c7ea5bc9b56284b00b5ae7911c6f18cb3c65bbbfe7106f69fd7e2ff8091d8a14c848869212fafcd50806f154694c7bf5fa22f857bab5e5bca15eff4603fb1873734a6bf1956234922bdbef5f1d92d9ec8b588072befe4cc5d89570c2e5ce8006d901a61210e8c2320cbfb80102e4da9f0592288aff72de9460def0a4b1d5f4185aae573cde262cf7d0a28aeb7483b15438688cfc77984d0bbfc36cbd912d4d30191c1444f8d538cceef6f628a73616bccf787db7939ace25f97fc987726c0e050466967567c0f9800d9372dfce70829a67975fd76de12f4df3747e524a0dd156f227cda885edb945f673c68087ad7955ac44dc45ac211a789f8bc07f7ca66257bb3cbd2d5ecbe995be6d20c963c16fc6f12ba8861546728f9555c8d8db92585ceaafb55be016b759064830e219eeb24354d5ba15a653732e6baead1dc72010bbda439d092cdab29b37f65fe001adac89ee6f5d66764fa73aba4f6a1fa6037a52312478fb695b2ad3af6a65dbcadf6e46f9816085fc7b4732fe3b04852a0ec2a5870d6d5706f138e3cae4f7865cee8e7e8c39ca43118494ad871e3c49da7b0689b67d33521fbbbf4a98c3eb07509aa139a34438a99ac437e7882efad3b9fef52cb683b6b598e6c21cbe1d0c817b91f53ac098ff1db71c036333f7c2fe168e693eb7c2b3292b1e44207ee0b6aec72987b0146913eed40cf99e69112ecb5b90dc73ff09d5e2f9711028eb61ca8020bdee46154fc3c681c54471b2b6e702d7cf0dd2a92530a5d8e5f72fb90e96734412235b231cb8ef2adb16266961e7d0e823a7ff295a7218603a780c298a49cda33c56ac75415a5e2d1a67229d2d0587ec18477373493913c9fbffb295a2e1868ebeceb6b7ede35f0bd9c42852de636ef854f3378e80147280f8515038f0906ed2a604bcc77f64270cecaeda42c92afa82756202c8f72a60a54616bf89777d5adbb36792e136f0f1506c8198df0986d1d5d0a07a3a495648915df743a74030fdb7949dfabfdf0db628767a23fbaec2bd576fa950e918d4de43e313d306bee33781c7e3a1a643be2bc2792a04e3ea9e47db145aa0cd28ad0bc40dd8e795603ad501724caceb7cc1687dc89709a7b5e83dec2fc2f3adacc42b877b4651042496b573596a756909fc9e860733eaa43861e18016691583f0c53ddde3210d9930e16e7d6279544306a01f3a7bb21898ea0ac673069412e8336eb82916af258fbef768495bdf389f1bd04f5a3b8a94075d7bbd18e71ab8666d48c476c232cb7083c17c5dab97480d4996bac6f327bdffe50d578fe261df0064899102bf87e5d1a1aa2ca72ffe5072265ea1af4d81d00ff396245d550598b759315a4c7b3f300344e451b144179afc9bcf52c4d98ff67eacc55b0c7a3925082c3614a7605a4407f2351face6ed3589b45be662d8919bf14207bdb28850991fda95dde682c3c3c8cff1eee17d4dfde405d248d0fbf460169033f4d4f79e032fa132594f3fe55527b43763cee16a828badca7b478ade7a49c722ac44dc9821381d3328bdcb28b1cb5ae6280a07c67d7e96df9949d6828a1fc7fb3dff5ad5785e19e899904aa39d79626a2b83614daa61acf9ef7e6d8862dc77c0cf37572e895ed0c1a835526b44a39ed1bfcf3b423ed51e5d729f8ce99b2c5853aa9f05aac1a27f62f6f43e00514748b2b194e68fd7205bc2b6ab69e12413d6299744efa2719aac39279cae001673f07925e22c0cbd869bb93d3311a3920f66b3dca5a57ca61a100e504b1529c7e60e1a9801113701a46d544200553b9c0e31edb8940ee9b52cb414012c78971a126f9de370191a32cf10cbe649681aa2cc4fa1c7be82f888473a4e64a5c73f9ba1468deb8871f25de23c585ad0ca63e104ea718ed27731539a608b0e5f5a5de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0x1000}, {&(0x7f0000000340)="f1d0d8bc12a764f9a01153a9e89c73c7a285eab8a84607206f3dbf41ee91498af913d21f1c8ed2918ac4883a16ff74cb8887acc44ad76fc23f4671801db1c6a6f4f273d26985ec0e712efea777b4aa90c1dd4903629d52ae22935ad0ac0912bcd1e93118f8afe9dbd752273d381083dc18dc3270cd3b88b38ca04b674670c89d1db8b0f25512b2808625147c2bd4a4eb5c7c3c6785d92b5863bba7b6727d48", 0x9f}, {&(0x7f0000000280)="89f2dad152e888b38c1703caf6c53cb59b05ddd78febff0c2960e7bba2ef6f721792a7e7e8ac4e5d9d3901a93828f96dbd8f74ff7a07cfb35aea7d5c242d77f950b0e31cc40b2b21b6dcc0f3c0eec6d5f9695e4048e6cd9061e4291b54347e88656c694da476db5ef0e8992653", 0x6d}, {&(0x7f0000000140)="ef8bd1721fa0c754d2bf340cb25141aac405d3e1f0e9adf8d6916cab67c8122d7d1967e13979870e9197bf988e131e", 0x2f}, 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0xf46}], 0x5}}, {{0x0, 0x0, &(0x7f0000000bc0)=[{&(0x7f0000000ac0)="96", 0x1}], 0x1}}, {{0x0, 0x0, &(0x7f0000001340)=[{&(0x7f00000011c0)="fc", 0x1e6a8}], 0x1}}], 0x3, 0x0)

C repro: repro.c.txt

cpaasch commented 1 year ago

Bisected to a3a65a4e223bf2085df7efe3023af0e6dadea724