syzkaller login: [ 307.178356][ T1858] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 318.107577][ T1858] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 318.142251][ T1858] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 370.496291][ T1858] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. Warning: Permanently added '[localhost]:54261' (ECDSA) to the list of known hosts. 1970/01/01 00:06:39 fuzzer started 1970/01/01 00:06:55 dialing manager at localhost:46487 [ 422.438677][ T2049] cgroup: Unknown subsys name 'net' [ 423.840941][ T2049] cgroup: Unknown subsys name 'rlimit' 1970/01/01 00:07:03 syscalls: 2827 1970/01/01 00:07:03 code coverage: enabled 1970/01/01 00:07:03 comparison tracing: ioctl(KCOV_DISABLE) failed: invalid argument 1970/01/01 00:07:03 extra coverage: enabled 1970/01/01 00:07:03 delay kcov mmap: mmap returned an invalid pointer 1970/01/01 00:07:03 setuid sandbox: enabled 1970/01/01 00:07:03 namespace sandbox: enabled 1970/01/01 00:07:03 Android sandbox: /sys/fs/selinux/policy does not exist 1970/01/01 00:07:03 fault injection: enabled 1970/01/01 00:07:03 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 1970/01/01 00:07:03 net packet injection: enabled 1970/01/01 00:07:03 net device setup: enabled 1970/01/01 00:07:03 concurrency sanitizer: /sys/kernel/debug/kcsan does not exist 1970/01/01 00:07:03 devlink PCI setup: PCI device 0000:00:10.0 is not available 1970/01/01 00:07:03 USB emulation: enabled 1970/01/01 00:07:03 hci packet injection: /dev/vhci does not exist 1970/01/01 00:07:03 wifi device emulation: /sys/class/mac80211_hwsim/ does not exist 1970/01/01 00:07:03 802.15.4 emulation: /sys/bus/platform/devices/mac802154_hwsim does not exist 1970/01/01 00:07:03 fetching corpus: 0, signal 0/2000 (executing program) 1970/01/01 00:07:09 fetching corpus: 50, signal 31072/34671 (executing program) 1970/01/01 00:07:12 fetching corpus: 100, signal 42238/47426 (executing program) 1970/01/01 00:07:17 fetching corpus: 150, signal 52124/58781 (executing program) 1970/01/01 00:07:22 fetching corpus: 200, signal 68022/75884 (executing program) 1970/01/01 00:07:24 fetching corpus: 250, signal 73339/82587 (executing program) 1970/01/01 00:07:26 fetching corpus: 300, signal 78387/88930 (executing program) 1970/01/01 00:07:29 fetching 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(executing program) 1970/01/01 00:18:56 fetching corpus: 11635, signal 307151/318294 (executing program) 1970/01/01 00:18:59 fetching corpus: 11685, signal 307447/318294 (executing program) 1970/01/01 00:19:01 fetching corpus: 11735, signal 307677/318294 (executing program) 1970/01/01 00:19:04 fetching corpus: 11785, signal 308233/318294 (executing program) 1970/01/01 00:19:06 fetching corpus: 11835, signal 308485/318294 (executing program) 1970/01/01 00:19:11 fetching corpus: 11885, signal 308732/318294 (executing program) 1970/01/01 00:19:14 fetching corpus: 11935, signal 309076/318294 (executing program) 1970/01/01 00:19:17 fetching corpus: 11985, signal 309403/318294 (executing program) 1970/01/01 00:19:20 fetching corpus: 12035, signal 309706/318294 (executing program) 1970/01/01 00:19:22 fetching corpus: 12085, signal 310014/318294 (executing program) 1970/01/01 00:19:24 fetching corpus: 12135, signal 310481/318294 (executing program) 1970/01/01 00:19:26 fetching corpus: 12184, signal 310788/318294 (executing program) 1970/01/01 00:19:29 fetching corpus: 12234, signal 311220/318294 (executing program) 1970/01/01 00:19:31 fetching corpus: 12284, signal 311617/318294 (executing program) 1970/01/01 00:19:34 fetching corpus: 12334, signal 313266/318294 (executing program) 1970/01/01 00:19:39 fetching corpus: 12384, signal 313595/318294 (executing program) 1970/01/01 00:19:42 fetching corpus: 12434, signal 313941/318294 (executing program) 1970/01/01 00:19:44 fetching corpus: 12484, signal 314355/318294 (executing program) 1970/01/01 00:19:47 fetching corpus: 12534, signal 315016/318294 (executing program) 1970/01/01 00:19:47 fetching corpus: 12538, signal 315043/318294 (executing program) 1970/01/01 00:19:48 fetching corpus: 12538, signal 315043/318294 (executing program) 1970/01/01 00:21:55 starting 2 fuzzer processes 00:21:55 executing program 0: r0 = socket$nl_route(0x10, 0x3, 0x0) r1 = socket$can_j1939(0x1d, 0x2, 0x7) ioctl$ifreq_SIOCGIFINDEX_vcan(r1, 0x8933, &(0x7f00000000c0)={'vxcan1\x00', 0x0}) sendmsg$nl_route(r0, &(0x7f0000002180)={0x0, 0x0, &(0x7f0000002140)={&(0x7f0000000080)=ANY=[@ANYBLOB="2800000015000100000000000000000002000000", @ANYRES32=r2], 0x28}}, 0x0) r3 = socket$nl_route(0x10, 0x3, 0x0) r4 = socket$can_j1939(0x1d, 0x2, 0x7) ioctl$ifreq_SIOCGIFINDEX_vcan(r4, 0x8933, &(0x7f00000000c0)={'vxcan1\x00', 0x0}) sendmsg$nl_route(r3, &(0x7f00000001c0)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000000)=@ipv4_newaddr={0x20, 0x14, 0x405, 0x0, 0x0, {0x2, 0x0, 0x0, 0x0, r5}, [@IFA_LOCAL={0x8, 0x2, @local}]}, 0x20}}, 0x0) 00:21:55 executing program 1: setreuid(0xffffffffffffffff, 0xee00) r0 = socket$nl_rdma(0x10, 0x3, 0x14) connect$netlink(r0, &(0x7f0000000080)=@kern={0x10, 0x0, 0x0, 0x81402}, 0xc) [ 1355.684349][ T2072] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 1356.408994][ T2072] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 1356.498677][ T2073] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 1357.209101][ T2073] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 1370.166422][ T2072] device hsr_slave_0 entered promiscuous mode [ 1370.231689][ T2072] device hsr_slave_1 entered promiscuous mode [ 1372.405181][ T2073] device hsr_slave_0 entered promiscuous mode [ 1372.469407][ T2073] device hsr_slave_1 entered promiscuous mode [ 1372.510308][ T2073] debugfs: Directory 'hsr0' with parent 'hsr' already present! [ 1372.518241][ T2073] Cannot create hsr debugfs directory [ 1381.506174][ T2072] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 1381.715305][ T2072] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 1382.108630][ T2072] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 1382.278860][ T2072] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 1383.610824][ T2073] netdevsim netdevsim1 netdevsim0: renamed from eth0 [ 1383.720319][ T2073] netdevsim netdevsim1 netdevsim1: renamed from eth1 [ 1384.004586][ T2073] netdevsim netdevsim1 netdevsim2: renamed from eth2 [ 1384.555392][ T2073] netdevsim netdevsim1 netdevsim3: renamed from eth3 [ 1397.051399][ T2072] 8021q: adding VLAN 0 to HW filter on device bond0 [ 1398.177373][ T2050] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 1398.357577][ T2050] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 1398.686646][ T2073] 8021q: adding VLAN 0 to HW filter on device bond0 [ 1399.549121][ T2050] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 1399.621103][ T2050] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 1407.106758][ T2050] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 1407.131824][ T2050] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 1407.441432][ C0] ================================================================== [ 1407.444868][ C0] BUG: KASAN: use-after-free in walk_stackframe+0x11c/0x260 [ 1407.446192][ C0] Read of size 8 at addr ffffaf80081bfff0 by task syz-executor.0/2072 [ 1407.448484][ C0] [ 1407.449963][ C0] CPU: 0 PID: 2072 Comm: syz-executor.0 Not tainted 5.17.0-rc1-syzkaller-00002-g0966d385830d #0 [ 1407.451331][ C0] Hardware name: riscv-virtio,qemu (DT) [ 1407.452365][ C0] Call Trace: [ 1407.453464][ C0] [] dump_backtrace+0x2e/0x3c [ 1407.454726][ C0] [] show_stack+0x34/0x40 [ 1407.455721][ C0] [] dump_stack_lvl+0xe4/0x150 [ 1407.456842][ C0] [] print_address_description.constprop.0+0x2a/0x330 [ 1407.458199][ C0] [] kasan_report+0x184/0x1e0 [ 1407.459357][ C0] [] __asan_load8+0x6e/0x96 [ 1407.460444][ C0] [] walk_stackframe+0x11c/0x260 [ 1407.461508][ C0] [] arch_stack_walk+0x2c/0x3c [ 1407.463059][ C0] [] stack_trace_save+0xa6/0xd8 [ 1407.465171][ C0] [ 1407.465807][ C0] The buggy address belongs to the page: [ 1407.467059][ C0] page:ffffaf807a890db8 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x883bf [ 1407.468558][ C0] flags: 0x8800000000(section=17|node=0|zone=0) [ 1407.470735][ C0] raw: 0000008800000000 0000000000000000 ffffaf807a890d78 0000000000000000 [ 1407.472015][ C0] raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 [ 1407.473510][ C0] raw: 00000000000007ff [ 1407.474458][ C0] page dumped because: kasan: bad access detected [ 1407.475860][ C0] page_owner tracks the page as freed [ 1407.476633][ C0] page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd2a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 2041, ts 1014111796800, free_ts 1374961824100 [ 1407.478765][ C0] __set_page_owner+0x48/0x136 [ 1407.479734][ C0] post_alloc_hook+0xd0/0x10a [ 1407.480687][ C0] get_page_from_freelist+0x8da/0x12d8 [ 1407.481638][ C0] __alloc_pages+0x150/0x3b6 [ 1407.482673][ C0] alloc_pages+0x132/0x2a6 [ 1407.483837][ C0] alloc_slab_page.constprop.0+0xc2/0xfa [ 1407.484916][ C0] new_slab+0x76/0x2cc [ 1407.485747][ C0] ___slab_alloc+0x56e/0x918 [ 1407.486711][ C0] __slab_alloc.constprop.0+0x50/0x8c [ 1407.487724][ C0] __kmalloc_node_track_caller+0x26c/0x362 [ 1407.488712][ C0] __alloc_skb+0xee/0x2e4 [ 1407.489602][ C0] __napi_alloc_skb+0x72/0x214 [ 1407.490562][ C0] page_to_skb+0x16e/0x70e [ 1407.491483][ C0] receive_buf+0xa20/0x3e50 [ 1407.492502][ C0] virtnet_poll+0x39c/0x986 [ 1407.493859][ C0] __napi_poll+0x7c/0x358 [ 1407.494978][ C0] page last free stack trace: [ 1407.495726][ C0] __reset_page_owner+0x4a/0xea [ 1407.496621][ C0] free_pcp_prepare+0x29c/0x45e [ 1407.497536][ C0] free_unref_page+0x6a/0x31e [ 1407.498562][ C0] __free_pages+0xe2/0x112 [ 1407.499433][ C0] __free_slab+0x122/0x27c [ 1407.500319][ C0] discard_slab+0x4c/0x7a [ 1407.501226][ C0] __slab_free+0x20a/0x29c [ 1407.502204][ C0] ___cache_free+0x17c/0x354 [ 1407.503444][ C0] qlist_free_all+0x7c/0x132 [ 1407.504444][ C0] kasan_quarantine_reduce+0x14c/0x1c8 [ 1407.505453][ C0] __kasan_slab_alloc+0x5c/0x98 [ 1407.506469][ C0] __kmalloc+0x156/0x318 [ 1407.507361][ C0] kzalloc.constprop.0+0x24/0x2e [ 1407.508305][ C0] __register_sysctl_table+0xfc/0xcb0 [ 1407.509247][ C0] register_net_sysctl+0x23e/0x2f6 [ 1407.510214][ C0] __devinet_sysctl_register+0x156/0x1fc [ 1407.511387][ C0] [ 1407.512007][ C0] Memory state around the buggy address: [ 1407.513443][ C0] ffffaf80081bfe80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 1407.514837][ C0] ffffaf80081bff00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 1407.515919][ C0] >ffffaf80081bff80: 00 00 00 00 00 00 00 00 00 00 00 00 ff ff ff ff [ 1407.516890][ C0] ^ [ 1407.517996][ C0] ffffaf80081c0000: 00 00 00 00 f1 f1 f1 f1 00 00 00 f3 f3 f3 f3 f3 [ 1407.519015][ C0] ffffaf80081c0080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 1407.520032][ C0] ================================================================== [ 1407.520941][ C0] Disabling lock debugging due to kernel taint [ 1407.525842][ T2072] Kernel panic - not syncing: corrupted stack end detected inside scheduler [ 1407.527013][ T2072] CPU: 0 PID: 2072 Comm: syz-executor.0 Tainted: G B 5.17.0-rc1-syzkaller-00002-g0966d385830d #0 [ 1407.528096][ T2072] Hardware name: riscv-virtio,qemu (DT) [ 1407.528725][ T2072] Call Trace: [ 1407.529192][ T2072] [] dump_backtrace+0x2e/0x3c [ 1407.530047][ T2072] [] show_stack+0x34/0x40 [ 1407.530951][ T2072] [] dump_stack_lvl+0xe4/0x150 [ 1407.531872][ T2072] [] dump_stack+0x1c/0x24 [ 1407.533126][ T2072] [] panic+0x24a/0x634 [ 1407.534085][ T2072] [] schedule+0x0/0x14c [ 1407.534917][ T2072] [] preempt_schedule_common+0x4e/0xde [ 1407.535765][ T2072] [] preempt_schedule+0x34/0x36 [ 1407.536538][ T2072] [] _raw_spin_unlock_irqrestore+0x8c/0x98 [ 1407.537415][ T2072] [] __unfreeze_partials+0x15a/0x18e [ 1407.538270][ T2072] [] put_cpu_partial+0xf6/0x162 [ 1407.539056][ T2072] [] __slab_free+0x166/0x29c [ 1407.539855][ T2072] [] ___cache_free+0x17c/0x354 [ 1407.540661][ T2072] [] qlist_free_all+0x7c/0x132 [ 1407.541494][ T2072] [] kasan_quarantine_reduce+0x14c/0x1c8 [ 1407.542656][ T2072] [] __kasan_slab_alloc+0x5c/0x98 [ 1407.543585][ T2072] [] __kmalloc_node_track_caller+0x174/0x362 [ 1407.544463][ T2072] [] __alloc_skb+0xee/0x2e4 [ 1407.545419][ T2072] [] rtmsg_fib+0x108/0x2be [ 1407.546424][ T2072] [] fib_table_insert+0x52a/0xebe [ 1407.547298][ T2072] [] fib_magic+0x3f4/0x438 [ 1407.548214][ T2072] [] fib_add_ifaddr+0x2be/0x2e2 [ 1407.549003][ T2072] [] fib_netdev_event+0x362/0x4b0 [ 1407.549854][ T2072] [] notifier_call_chain+0xb8/0x188 [ 1407.550744][ T2072] [] raw_notifier_call_chain+0x2a/0x38 [ 1407.551582][ T2072] [] call_netdevice_notifiers_info+0x9e/0x10c [ 1407.552790][ T2072] [] __dev_notify_flags+0x108/0x1fa [ 1407.553779][ T2072] [] dev_change_flags+0x9c/0xba [ 1407.554688][ T2072] [] do_setlink+0x5d6/0x21c4 [ 1407.555570][ T2072] [] __rtnl_newlink+0x99e/0xfa0 [ 1407.556432][ T2072] [] rtnl_newlink+0x60/0x8c [ 1407.557311][ T2072] [] rtnetlink_rcv_msg+0x338/0x9a0 [ 1407.558261][ T2072] [] netlink_rcv_skb+0xf8/0x2be [ 1407.559121][ T2072] [] rtnetlink_rcv+0x26/0x30 [ 1407.559929][ T2072] [] netlink_unicast+0x40e/0x5fe [ 1407.560762][ T2072] [] netlink_sendmsg+0x4e0/0x994 [ 1407.561559][ T2072] [] sock_sendmsg+0xa0/0xc4 [ 1407.562525][ T2072] [] __sys_sendto+0x1f2/0x2e0 [ 1407.563511][ T2072] [] sys_sendto+0x3e/0x52 [ 1407.564336][ T2072] [] ret_from_syscall+0x0/0x2 [ 1407.565355][ T2072] SMP: stopping secondary CPUs [ 1407.567282][ T2072] Rebooting in 86400 seconds.. VM DIAGNOSIS: 10:20:42 Registers: info registers vcpu 0 pc ffffffff8010b22c mhartid 0000000000000000 mstatus 00000000000000a0 mip 00000000000000a0 mie 000000000000022a mideleg 0000000000000222 medeleg 000000000000b109 mtvec 0000000080000540 stvec ffffffff800055d4 mepc ffffffff80200fec sepc ffffffff8000a052 mcause 8000000000000007 scause 8000000000000005 mtval 0000000000000000 stval 0000000000000000 x0/zero 0000000000000000 x1/ra ffffffff831a18d8 x2/sp ffffaf80081bf980 x3/gp ffffffff85863ac0 x4/tp ffffaf80074048c0 x5/t0 ffffffff86bcb657 x6/t1 3d47b50457537b00 x7/t2 0000000000000000 x8/s0 ffffaf80081bf990 x9/s1 0000000000001000 x10/a0 0000000000000020 x11/a1 ffffffffffffffff x12/a2 1ffff5f000e80919 x13/a3 ffffffff80146d84 x14/a4 0000000000000508 x15/a5 0000000000000000 x16/a6 0000000000f00000 x17/a7 ffffffff8011efb0 x18/s2 ffffaf80081bfac0 x19/s3 ffffffff84b73ec0 x20/s4 0000000000000000 x21/s5 ffffffff8343c840 x22/s6 ffffffffffffffff x23/s7 ffffffff8588c3e0 x24/s8 ffffffff86c1a620 x25/s9 1ffff5f001037f48 x26/s10 ffffffff84a88898 x27/s11 ffffffff8011efd0 x28/t3 fffffffff3f3f300 x29/t4 ffffffff80112282 x30/t5 1ffff5f001037f14 x31/t6 ffffffff86bcb657 f0/ft0 0000000000000000 f1/ft1 0000000000000000 f2/ft2 0000000000000000 f3/ft3 0000000000000000 f4/ft4 0000000000000000 f5/ft5 0000000000000000 f6/ft6 0000000000000000 f7/ft7 0000000000000000 f8/fs0 0000000000000000 f9/fs1 0000000000000000 f10/fa0 0000000000000000 f11/fa1 0000000000000000 f12/fa2 0000000000000000 f13/fa3 0000000000000000 f14/fa4 0000000000000000 f15/fa5 0000000000000000 f16/fa6 0000000000000000 f17/fa7 0000000000000000 f18/fs2 0000000000000000 f19/fs3 0000000000000000 f20/fs4 0000000000000000 f21/fs5 0000000000000000 f22/fs6 0000000000000000 f23/fs7 0000000000000000 f24/fs8 0000000000000000 f25/fs9 0000000000000000 f26/fs10 0000000000000000 f27/fs11 0000000000000000 f28/ft8 0000000000000000 f29/ft9 0000000000000000 f30/ft10 0000000000000000 f31/ft11 0000000000000000 info registers vcpu 1 pc ffffffff80119b52 mhartid 0000000000000001 mstatus 00000000000000a2 mip 0000000000000000 mie 00000000000002aa mideleg 0000000000000222 medeleg 000000000000b109 mtvec 0000000080000540 stvec ffffffff800055d4 mepc ffffffff8000f97e sepc 00007fff8b519264 mcause 0000000000000009 scause 0000000000000008 mtval 0000000000000000 stval 0000000000000000 x0/zero 0000000000000000 x1/ra ffffffff80119b52 x2/sp ffffaf8009d877e0 x3/gp ffffffff85863ac0 x4/tp ffffaf800bb50000 x5/t0 00000000000001f8 x6/t1 3d47b50457537b00 x7/t2 ffffffffffffffff x8/s0 ffffaf8009d87820 x9/s1 ffffaf800ca38c98 x10/a0 ffffaf800ca38c98 x11/a1 0000000000000003 x12/a2 1ffff5f001947193 x13/a3 ffffffff80119b52 x14/a4 0000000000000000 x15/a5 0000000000000001 x16/a6 0000000000f00000 x17/a7 ffffffff826e6226 x18/s2 0000000000000001 x19/s3 ffffaf800bb50000 x20/s4 ffffaf800ca38ca8 x21/s5 ffffaf800ca38ca0 x22/s6 ffffaf8009d87960 x23/s7 ffffaf8009d87b00 x24/s8 0000000000000000 x25/s9 0000000000004000 x26/s10 0000000000000040 x27/s11 0000000000000001 x28/t3 fffffffff3f3f300 x29/t4 ffffffff80112282 x30/t5 1ffff5f0013b0eb4 x31/t6 000000000071f847 f0/ft0 0000000000000000 f1/ft1 0000000000000000 f2/ft2 0000000000000000 f3/ft3 0000000000000000 f4/ft4 0000000000000000 f5/ft5 0000000000000000 f6/ft6 0000000000000000 f7/ft7 0000000000000000 f8/fs0 0000000000000000 f9/fs1 0000000000000000 f10/fa0 0000000000000000 f11/fa1 0000000000000000 f12/fa2 0000000000000000 f13/fa3 0000000000000000 f14/fa4 0000000000000000 f15/fa5 0000000000000000 f16/fa6 0000000000000000 f17/fa7 0000000000000000 f18/fs2 0000000000000000 f19/fs3 0000000000000000 f20/fs4 0000000000000000 f21/fs5 0000000000000000 f22/fs6 0000000000000000 f23/fs7 0000000000000000 f24/fs8 0000000000000000 f25/fs9 0000000000000000 f26/fs10 0000000000000000 f27/fs11 0000000000000000 f28/ft8 0000000000000000 f29/ft9 0000000000000000 f30/ft10 0000000000000000 f31/ft11 0000000000000000