UBSAN: object-size-mismatch in wg_xmit bridge0: port 2(bridge_slave_1) entered blocking state bridge0: port 2(bridge_slave_1) entered forwarding state IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready ================================================================================ UBSAN: object-size-mismatch in ./include/linux/skbuff.h:2016:28 member access within address 000000007d1c1fb7 with insufficient space for an object of type 'struct sk_buff' CPU: 0 PID: 105 Comm: kworker/0:2 Not tainted 5.10.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022 Workqueue: ipv6_addrconf addrconf_dad_work Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x19c/0x1e2 lib/dump_stack.c:118 ubsan_epilogue lib/ubsan.c:148 [inline] handle_object_size_mismatch lib/ubsan.c:297 [inline] ubsan_type_mismatch_common+0x1ed/0x3a0 lib/ubsan.c:310 __ubsan_handle_type_mismatch_v1+0x4b/0x60 lib/ubsan.c:339 __skb_queue_before include/linux/skbuff.h:2016 [inline] __skb_queue_tail include/linux/skbuff.h:2049 [inline] wg_xmit+0x42c/0xa60 drivers/net/wireguard/device.c:182 __netdev_start_xmit include/linux/netdevice.h:4735 [inline] netdev_start_xmit+0x8a/0x160 include/linux/netdevice.h:4749 xmit_one net/core/dev.c:3564 [inline] dev_hard_start_xmit+0x18d/0x2f0 net/core/dev.c:3580 __dev_queue_xmit+0xf16/0x1920 net/core/dev.c:4140 dev_queue_xmit+0x17/0x20 net/core/dev.c:4173 neigh_connected_output+0x288/0x2b0 net/core/neighbour.c:1520 neigh_output include/net/neighbour.h:510 [inline] ip6_finish_output2+0xc34/0x1020 net/ipv6/ip6_output.c:117 __ip6_finish_output+0x279/0x370 net/ipv6/ip6_output.c:143 ip6_finish_output+0x20b/0x220 net/ipv6/ip6_output.c:153 NF_HOOK_COND include/linux/netfilter.h:290 [inline] ip6_output+0x18c/0x3f0 net/ipv6/ip6_output.c:176 dst_output include/net/dst.h:443 [inline] NF_HOOK+0x88/0x210 include/linux/netfilter.h:301 ndisc_send_skb+0x653/0x9f0 net/ipv6/ndisc.c:508 ndisc_send_rs+0x26c/0x360 net/ipv6/ndisc.c:702 addrconf_dad_completed+0x493/0x970 net/ipv6/addrconf.c:4191 addrconf_dad_work+0x9d0/0x12d0 net/ipv6/addrconf.c:3956 process_one_work+0x3d5/0x640 kernel/workqueue.c:2272 worker_thread+0x723/0xa60 kernel/workqueue.c:2418 kthread+0x365/0x400 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 ================================================================================ ================================================================================ UBSAN: object-size-mismatch in ./include/linux/skbuff.h:1909:2 member access within address 000000007d1c1fb7 with insufficient space for an object of type 'struct sk_buff' CPU: 0 PID: 105 Comm: kworker/0:2 Not tainted 5.10.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022 Workqueue: ipv6_addrconf addrconf_dad_work Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x19c/0x1e2 lib/dump_stack.c:118 ubsan_epilogue lib/ubsan.c:148 [inline] handle_object_size_mismatch lib/ubsan.c:297 [inline] ubsan_type_mismatch_common+0x1ed/0x3a0 lib/ubsan.c:310 __ubsan_handle_type_mismatch_v1+0x4b/0x60 lib/ubsan.c:339 __skb_insert include/linux/skbuff.h:1909 [inline] __skb_queue_before include/linux/skbuff.h:2016 [inline] __skb_queue_tail include/linux/skbuff.h:2049 [inline] wg_xmit+0x48f/0xa60 drivers/net/wireguard/device.c:182 __netdev_start_xmit include/linux/netdevice.h:4735 [inline] netdev_start_xmit+0x8a/0x160 include/linux/netdevice.h:4749 xmit_one net/core/dev.c:3564 [inline] dev_hard_start_xmit+0x18d/0x2f0 net/core/dev.c:3580 __dev_queue_xmit+0xf16/0x1920 net/core/dev.c:4140 dev_queue_xmit+0x17/0x20 net/core/dev.c:4173 neigh_connected_output+0x288/0x2b0 net/core/neighbour.c:1520 neigh_output include/net/neighbour.h:510 [inline] ip6_finish_output2+0xc34/0x1020 net/ipv6/ip6_output.c:117 __ip6_finish_output+0x279/0x370 net/ipv6/ip6_output.c:143 ip6_finish_output+0x20b/0x220 net/ipv6/ip6_output.c:153 NF_HOOK_COND include/linux/netfilter.h:290 [inline] ip6_output+0x18c/0x3f0 net/ipv6/ip6_output.c:176 dst_output include/net/dst.h:443 [inline] NF_HOOK+0x88/0x210 include/linux/netfilter.h:301 ndisc_send_skb+0x653/0x9f0 net/ipv6/ndisc.c:508 ndisc_send_rs+0x26c/0x360 net/ipv6/ndisc.c:702 addrconf_dad_completed+0x493/0x970 net/ipv6/addrconf.c:4191 addrconf_dad_work+0x9d0/0x12d0 net/ipv6/addrconf.c:3956 process_one_work+0x3d5/0x640 kernel/workqueue.c:2272 worker_thread+0x723/0xa60 kernel/workqueue.c:2418 kthread+0x365/0x400 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 ================================================================================ Warning: Permanently added '10.128.0.2' (ECDSA) to the list of known hosts. 2022/11/04 06:14:16 fuzzer started 2022/11/04 06:14:16 connecting to host at 10.128.0.163:40777 2022/11/04 06:14:16 checking machine... 2022/11/04 06:14:16 checking revisions... 2022/11/04 06:14:16 testing simple program... [ 22.593851][ T22] audit: type=1400 audit(1667542456.690:73): avc: denied { integrity } for pid=362 comm="syz-fuzzer" lockdown_reason="debugfs access" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=lockdown permissive=1 [ 22.616178][ T22] audit: type=1400 audit(1667542456.700:74): avc: denied { getattr } for pid=362 comm="syz-fuzzer" path="user:[4026531837]" dev="nsfs" ino=4026531837 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:nsfs_t tclass=file permissive=1 [ 22.618440][ T371] cgroup: Unknown subsys name 'net' [ 22.639773][ T22] audit: type=1400 audit(1667542456.700:75): avc: denied { read } for pid=362 comm="syz-fuzzer" dev="nsfs" ino=4026531837 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:nsfs_t tclass=file permissive=1 [ 22.665840][ T22] audit: type=1400 audit(1667542456.700:76): avc: denied { open } for pid=362 comm="syz-fuzzer" path="user:[4026531837]" dev="nsfs" ino=4026531837 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:nsfs_t tclass=file permissive=1 [ 22.666014][ T371] cgroup: Unknown subsys name 'devices' [ 22.689277][ T22] audit: type=1400 audit(1667542456.720:77): avc: denied { read } for pid=362 comm="syz-fuzzer" name="raw-gadget" dev="devtmpfs" ino=165 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:device_t tclass=chr_file permissive=1 [ 22.717756][ T22] audit: type=1400 audit(1667542456.720:78): avc: denied { open } for pid=362 comm="syz-fuzzer" path="/dev/raw-gadget" dev="devtmpfs" ino=165 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:device_t tclass=chr_file permissive=1 [ 22.741435][ T22] audit: type=1400 audit(1667542456.720:79): avc: denied { mounton } for pid=371 comm="syz-executor" path="/syzcgroup/unified" dev="sda1" ino=1136 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:root_t tclass=dir permissive=1 [ 22.764676][ T22] audit: type=1400 audit(1667542456.720:80): avc: denied { mount } for pid=371 comm="syz-executor" name="/" dev="cgroup2" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:cgroup_t tclass=filesystem permissive=1 [ 22.787126][ T22] audit: type=1400 audit(1667542456.750:81): avc: denied { unmount } for pid=371 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:cgroup_t tclass=filesystem permissive=1 [ 22.868853][ T371] cgroup: Unknown subsys name 'hugetlb' [ 22.874511][ T371] cgroup: Unknown subsys name 'rlimit' [ 22.998565][ T22] audit: type=1400 audit(1667542457.110:82): avc: denied { setattr } for pid=371 comm="syz-executor" name="raw-gadget" dev="devtmpfs" ino=165 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:device_t tclass=chr_file permissive=1 [ 23.063754][ T373] bridge0: port 1(bridge_slave_0) entered blocking state [ 23.071160][ T373] bridge0: port 1(bridge_slave_0) entered disabled state [ 23.078880][ T373] device bridge_slave_0 entered promiscuous mode [ 23.085884][ T373] bridge0: port 2(bridge_slave_1) entered blocking state [ 23.093436][ T373] bridge0: port 2(bridge_slave_1) entered disabled state [ 23.100977][ T373] device bridge_slave_1 entered promiscuous mode [ 23.134127][ T373] bridge0: port 2(bridge_slave_1) entered blocking state [ 23.141173][ T373] bridge0: port 2(bridge_slave_1) entered forwarding state [ 23.148636][ T373] bridge0: port 1(bridge_slave_0) entered blocking state [ 23.155649][ T373] bridge0: port 1(bridge_slave_0) entered forwarding state [ 23.173113][ T23] bridge0: port 1(bridge_slave_0) entered disabled state [ 23.180369][ T23] bridge0: port 2(bridge_slave_1) entered disabled state [ 23.187781][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 23.195399][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 23.204296][ T105] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 23.212538][ T105] bridge0: port 1(bridge_slave_0) entered blocking state [ 23.220527][ T105] bridge0: port 1(bridge_slave_0) entered forwarding state [ 23.238006][ T105] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 23.246249][ T105] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 23.254956][ T105] bridge0: port 2(bridge_slave_1) entered blocking state [ 23.262182][ T105] bridge0: port 2(bridge_slave_1) entered forwarding state [ 23.270285][ T105] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 23.278315][ T105] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 23.296883][ T105] ================================================================================ [ 23.306275][ T105] UBSAN: object-size-mismatch in ./include/linux/skbuff.h:2016:28 [ 23.314120][ T105] member access within address 000000007d1c1fb7 with insufficient space [ 23.322449][ T105] for an object of type 'struct sk_buff' [ 23.328113][ T105] CPU: 0 PID: 105 Comm: kworker/0:2 Not tainted 5.10.0-syzkaller #0 [ 23.336081][ T105] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022 [ 23.346131][ T105] Workqueue: ipv6_addrconf addrconf_dad_work [ 23.352092][ T105] Call Trace: [ 23.355367][ T105] dump_stack+0x19c/0x1e2 [ 23.359685][ T105] ubsan_type_mismatch_common+0x1ed/0x3a0 [ 23.365564][ T105] __ubsan_handle_type_mismatch_v1+0x4b/0x60 [ 23.371537][ T105] wg_xmit+0x42c/0xa60 [ 23.375601][ T105] ? __sanitizer_cov_trace_switch+0x64/0x80 [ 23.381588][ T105] netdev_start_xmit+0x8a/0x160 [ 23.386446][ T105] dev_hard_start_xmit+0x18d/0x2f0 [ 23.391542][ T105] __dev_queue_xmit+0xf16/0x1920 [ 23.396569][ T105] ? __kasan_check_write+0x14/0x20 [ 23.401666][ T105] dev_queue_xmit+0x17/0x20 [ 23.406238][ T105] neigh_connected_output+0x288/0x2b0 [ 23.411592][ T105] ip6_finish_output2+0xc34/0x1020 [ 23.416692][ T105] ? ip6_mtu+0xf1/0x140 [ 23.420838][ T105] __ip6_finish_output+0x279/0x370 [ 23.425929][ T105] ip6_finish_output+0x20b/0x220 [ 23.430868][ T105] ? ip6_output+0x175/0x3f0 [ 23.435362][ T105] ip6_output+0x18c/0x3f0 [ 23.439932][ T105] ? ip6_dst_idev+0x40/0x40 [ 23.444420][ T105] NF_HOOK+0x88/0x210 [ 23.448380][ T105] ? NF_HOOK+0x210/0x210 [ 23.452603][ T105] ndisc_send_skb+0x653/0x9f0 [ 23.457259][ T105] ndisc_send_rs+0x26c/0x360 [ 23.461861][ T105] addrconf_dad_completed+0x493/0x970 [ 23.467207][ T105] addrconf_dad_work+0x9d0/0x12d0 [ 23.472223][ T105] process_one_work+0x3d5/0x640 [ 23.477063][ T105] worker_thread+0x723/0xa60 [ 23.481650][ T105] ? _raw_spin_lock_irqsave+0xa2/0x220 [ 23.487109][ T105] kthread+0x365/0x400 [ 23.491168][ T105] ? pr_cont_work+0x110/0x110 [ 23.495829][ T105] ? __list_add+0xc0/0xc0 [ 23.500136][ T105] ret_from_fork+0x1f/0x30 [ 23.504645][ T105] ================================================================================ [ 23.514042][ T105] ================================================================================ [ 23.523881][ T105] UBSAN: object-size-mismatch in ./include/linux/skbuff.h:1909:2 [ 23.531690][ T105] member access within address 000000007d1c1fb7 with insufficient space [ 23.540107][ T105] for an object of type 'struct sk_buff' [ 23.545725][ T105] CPU: 0 PID: 105 Comm: kworker/0:2 Not tainted 5.10.0-syzkaller #0 [ 23.553761][ T105] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022 [ 23.563797][ T105] Workqueue: ipv6_addrconf addrconf_dad_work [ 23.569747][ T105] Call Trace: [ 23.573019][ T105] dump_stack+0x19c/0x1e2 [ 23.577323][ T105] ubsan_type_mismatch_common+0x1ed/0x3a0 [ 23.583014][ T105] __ubsan_handle_type_mismatch_v1+0x4b/0x60 [ 23.588979][ T105] wg_xmit+0x48f/0xa60 [ 23.593113][ T105] ? __sanitizer_cov_trace_switch+0x64/0x80 [ 23.599157][ T105] netdev_start_xmit+0x8a/0x160 [ 23.603981][ T105] dev_hard_start_xmit+0x18d/0x2f0 [ 23.609065][ T105] __dev_queue_xmit+0xf16/0x1920 [ 23.613992][ T105] ? __kasan_check_write+0x14/0x20 [ 23.619077][ T105] dev_queue_xmit+0x17/0x20 [ 23.623564][ T105] neigh_connected_output+0x288/0x2b0 [ 23.628935][ T105] ip6_finish_output2+0xc34/0x1020 [ 23.634107][ T105] ? ip6_mtu+0xf1/0x140 [ 23.638238][ T105] __ip6_finish_output+0x279/0x370 [ 23.643349][ T105] ip6_finish_output+0x20b/0x220 [ 23.648290][ T105] ? ip6_output+0x175/0x3f0 [ 23.652788][ T105] ip6_output+0x18c/0x3f0 [ 23.657091][ T105] ? ip6_dst_idev+0x40/0x40 [ 23.661600][ T105] NF_HOOK+0x88/0x210 [ 23.665564][ T105] ? NF_HOOK+0x210/0x210 [ 23.669779][ T105] ndisc_send_skb+0x653/0x9f0 [ 23.674437][ T105] ndisc_send_rs+0x26c/0x360 [ 23.679001][ T105] addrconf_dad_completed+0x493/0x970 [ 23.684357][ T105] addrconf_dad_work+0x9d0/0x12d0 [ 23.689366][ T105] process_one_work+0x3d5/0x640 [ 23.694278][ T105] worker_thread+0x723/0xa60 [ 23.698847][ T105] ? _raw_spin_lock_irqsave+0xa2/0x220 [ 23.704379][ T105] kthread+0x365/0x400 [ 23.708423][ T105] ? pr_cont_work+0x110/0x110 [ 23.713085][ T105] ? __list_add+0xc0/0xc0 [ 23.717391][ T105] ret_from_fork+0x1f/0x30 [ 23.721822][ T105] ================================================================================ [ 23.733016][ T73] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready 2022/11/04 06:14:17 building call list... [ 23.741479][ T73] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 23.749838][ T73] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 23.757824][ T73] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 23.773325][ T373] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation [ 23.847973][ T373] ================================================================== [ 23.856242][ T373] BUG: KASAN: use-after-free in task_active_pid_ns+0x9a/0xa0 [ 23.863611][ T373] Read of size 4 at addr ffff88810015a184 by task syz-executor.0/373 [ 23.871674][ T373] [ 23.874015][ T373] CPU: 0 PID: 373 Comm: syz-executor.0 Not tainted 5.10.0-syzkaller #0 [ 23.882329][ T373] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022 [ 23.892408][ T373] Call Trace: [ 23.895705][ T373] dump_stack+0x19c/0x1e2 [ 23.900135][ T373] print_address_description+0x7e/0x6a0 [ 23.905973][ T373] ? printk+0x76/0x96 [ 23.910038][ T373] kasan_report+0x16f/0x210 [ 23.914559][ T373] ? task_active_pid_ns+0x9a/0xa0 [ 23.919590][ T373] ? task_active_pid_ns+0x9a/0xa0 [ 23.924603][ T373] __asan_report_load4_noabort+0x14/0x20 [ 23.930306][ T373] task_active_pid_ns+0x9a/0xa0 [ 23.935139][ T373] do_notify_parent+0x2c7/0xa70 [ 23.939975][ T373] ? __kasan_check_write+0x14/0x20 [ 23.945071][ T373] do_exit+0x1a52/0x2190 [ 23.949293][ T373] ? avc_has_perm_noaudit+0xc7/0x1b0 [ 23.954577][ T373] do_group_exit+0x13f/0x310 [ 23.959202][ T373] get_signal+0xbef/0x10c0 [ 23.963611][ T373] arch_do_signal+0x42/0x710 [ 23.968185][ T373] ? __sanitizer_cov_trace_const_cmp4+0x19/0x20 [ 23.974613][ T373] exit_to_user_mode_loop+0xa3/0xe0 [ 23.979891][ T373] syscall_exit_to_user_mode+0x77/0xa0 [ 23.985422][ T373] do_syscall_64+0x40/0x70 [ 23.989823][ T373] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 23.995689][ T373] RIP: 0033:0x7fc85c3f1c4a [ 24.000074][ T373] Code: Unable to access opcode bytes at RIP 0x7fc85c3f1c20. [ 24.007417][ T373] RSP: 002b:00007ffd1da024d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000036 [ 24.015807][ T373] RAX: 0000000000000000 RBX: 0000000000000029 RCX: 00007fc85c3f1c4a [ 24.023762][ T373] RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000003 [ 24.031712][ T373] RBP: 00007ffd1da02500 R08: 00000000000003b8 R09: ffffffffffff0000 [ 24.039662][ T373] R10: 00007fc85c4e5bc0 R11: 0000000000000206 R12: 00007ffd1da02560 [ 24.047622][ T373] R13: 0000000000000003 R14: 00007ffd1da024fc R15: 00007fc85c4e5b60 [ 24.055582][ T373] [ 24.057887][ T373] Allocated by task 0: [ 24.061935][ T373] __kasan_kmalloc+0x11a/0x150 [ 24.066680][ T373] kasan_slab_alloc+0xe/0x10 [ 24.071378][ T373] slab_post_alloc_hook+0x3f/0x70 [ 24.076465][ T373] kmem_cache_alloc+0x143/0x200 [ 24.081386][ T373] alloc_pid+0x9a/0xb00 [ 24.085521][ T373] copy_process+0xdc0/0x2110 [ 24.090097][ T373] kernel_clone+0x1df/0x690 [ 24.094581][ T373] kernel_thread+0x11b/0x160 [ 24.099162][ T373] rest_init+0x22/0xf0 [ 24.103296][ T373] arch_call_rest_init+0xe/0x10 [ 24.108251][ T373] start_kernel+0x47d/0x518 [ 24.112828][ T373] x86_64_start_reservations+0x2a/0x2c [ 24.118274][ T373] x86_64_start_kernel+0x7a/0x7d [ 24.123244][ T373] secondary_startup_64_no_verify+0xb0/0xbb [ 24.129134][ T373] [ 24.131529][ T373] Freed by task 371: [ 24.135406][ T373] kasan_set_track+0x4c/0x80 [ 24.139976][ T373] kasan_set_free_info+0x1b/0x30 [ 24.144887][ T373] __kasan_slab_free+0x11c/0x150 [ 24.149797][ T373] kasan_slab_free+0xe/0x10 [ 24.154439][ T373] slab_free_freelist_hook+0x8b/0x160 [ 24.159786][ T373] kmem_cache_free+0x9a/0x1c0 [ 24.164441][ T373] put_pid+0xb3/0x120 [ 24.168399][ T373] proc_do_cad_pid+0x131/0x1d0 [ 24.173137][ T373] proc_sys_call_handler+0x48d/0x640 [ 24.179609][ T373] proc_sys_write+0x22/0x30 [ 24.184101][ T373] vfs_write+0x466/0x560 [ 24.188516][ T373] ksys_write+0x155/0x260 [ 24.192839][ T373] __x64_sys_write+0x7b/0x90 [ 24.197407][ T373] do_syscall_64+0x34/0x70 [ 24.201826][ T373] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 24.207799][ T373] [ 24.210116][ T373] The buggy address belongs to the object at ffff88810015a180 [ 24.210116][ T373] which belongs to the cache pid of size 112 [ 24.223541][ T373] The buggy address is located 4 bytes inside of [ 24.223541][ T373] 112-byte region [ffff88810015a180, ffff88810015a1f0) [ 24.236706][ T373] The buggy address belongs to the page: [ 24.242325][ T373] page:00000000f6e03c96 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10015a [ 24.252629][ T373] flags: 0x8000000000000200(slab) [ 24.257720][ T373] raw: 8000000000000200 dead000000000100 dead000000000122 ffff888100134c80 [ 24.266434][ T373] raw: 0000000000000000 0000000000150015 00000001ffffffff 0000000000000000 [ 24.275189][ T373] page dumped because: kasan: bad access detected [ 24.281659][ T373] page_owner tracks the page as allocated [ 24.287356][ T373] page last allocated via order 0, migratetype Unmovable, gfp_mask 0x0() [ 24.295760][ T373] register_early_stack+0x41/0x80 [ 24.300761][ T373] init_page_owner+0x32/0x4f0 [ 24.305454][ T373] invoke_init_callbacks+0x63/0x6d [ 24.310715][ T373] page_ext_init+0x348/0x371 [ 24.315273][ T373] page_owner free stack trace missing [ 24.320614][ T373] [ 24.322914][ T373] Memory state around the buggy address: [ 24.328520][ T373] ffff88810015a080: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 24.336556][ T373] ffff88810015a100: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 24.344592][ T373] >ffff88810015a180: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 24.352644][ T373] ^ [ 24.356686][ T373] ffff88810015a200: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 24.364894][ T373] ffff88810015a280: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 24.373013][ T373] ================================================================== [ 24.381044][ T373] Disabling lock debugging due to kernel taint [ 24.387287][ T373] BUG: unable to handle page fault for address: ffffed122001c53f [ 24.394976][ T373] #PF: supervisor read access in kernel mode [ 24.400925][ T373] #PF: error_code(0x0000) - not-present page [ 24.406872][ T373] PGD 23fff2067 P4D 23fff2067 PUD 0 [ 24.412232][ T373] Oops: 0000 [#1] PREEMPT SMP KASAN [ 24.417407][ T373] CPU: 0 PID: 373 Comm: syz-executor.0 Tainted: G B 5.10.0-syzkaller #0 [ 24.427024][ T373] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022 [ 24.437095][ T373] RIP: 0010:task_active_pid_ns+0x69/0xa0 [ 24.442788][ T373] Code: 5d 56 1d 00 48 8d 7b 04 48 89 f8 48 c1 e8 03 42 8a 04 30 84 c0 75 33 8b 43 04 48 c1 e0 04 48 8d 5c 03 68 48 89 d8 48 c1 e8 03 <42> 80 3c 30 00 74 08 48 89 df e8 28 a7 4c 00 48 8b 03 eb 07 e8 1e [ 24.462544][ T373] RSP: 0018:ffffc9000033fb40 EFLAGS: 00010806 [ 24.468596][ T373] RAX: 1ffff1122001c53f RBX: ffff8891000e29f8 RCX: 0000000000000002 [ 24.476556][ T373] RDX: 0000000000000000 RSI: 0000000000000086 RDI: 0000000000000001 [ 24.484684][ T373] RBP: ffffc9000033fb50 R08: ffff8881191e2dc0 R09: fffffbfff0bc26f9 [ 24.492658][ T373] R10: fffffbfff0bc26f9 R11: 1ffffffff0bc26f8 R12: dffffc0000000000 [ 24.500704][ T373] R13: ffff8881191e2dc0 R14: dffffc0000000000 R15: ffff8881191e32e0 [ 24.508655][ T373] FS: 0000000000000000(0000) GS:ffff8881f7200000(0000) knlGS:0000000000000000 [ 24.518425][ T373] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.525172][ T373] CR2: ffffed122001c53f CR3: 0000000119127000 CR4: 00000000003506b0 [ 24.533212][ T373] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.541379][ T373] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.549865][ T373] Call Trace: [ 24.553146][ T373] do_notify_parent+0x2c7/0xa70 [ 24.557975][ T373] ? __kasan_check_write+0x14/0x20 [ 24.563070][ T373] do_exit+0x1a52/0x2190 [ 24.567289][ T373] ? avc_has_perm_noaudit+0xc7/0x1b0 [ 24.572727][ T373] do_group_exit+0x13f/0x310 [ 24.577300][ T373] get_signal+0xbef/0x10c0 [ 24.581875][ T373] arch_do_signal+0x42/0x710 [ 24.586441][ T373] ? __sanitizer_cov_trace_const_cmp4+0x19/0x20 [ 24.592658][ T373] exit_to_user_mode_loop+0xa3/0xe0 [ 24.598004][ T373] syscall_exit_to_user_mode+0x77/0xa0 [ 24.603437][ T373] do_syscall_64+0x40/0x70 [ 24.607832][ T373] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 24.613698][ T373] RIP: 0033:0x7fc85c3f1c4a [ 24.618260][ T373] Code: Unable to access opcode bytes at RIP 0x7fc85c3f1c20. [ 24.625784][ T373] RSP: 002b:00007ffd1da024d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000036 [ 24.634447][ T373] RAX: 0000000000000000 RBX: 0000000000000029 RCX: 00007fc85c3f1c4a [ 24.642392][ T373] RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000003 [ 24.650342][ T373] RBP: 00007ffd1da02500 R08: 00000000000003b8 R09: ffffffffffff0000 [ 24.658304][ T373] R10: 00007fc85c4e5bc0 R11: 0000000000000206 R12: 00007ffd1da02560 [ 24.666283][ T373] R13: 0000000000000003 R14: 00007ffd1da024fc R15: 00007fc85c4e5b60 [ 24.674228][ T373] Modules linked in: [ 24.678101][ T373] CR2: ffffed122001c53f [ 24.682235][ T373] ---[ end trace a2a7ae788bd15594 ]--- [ 24.687675][ T373] RIP: 0010:task_active_pid_ns+0x69/0xa0 [ 24.693315][ T373] Code: 5d 56 1d 00 48 8d 7b 04 48 89 f8 48 c1 e8 03 42 8a 04 30 84 c0 75 33 8b 43 04 48 c1 e0 04 48 8d 5c 03 68 48 89 d8 48 c1 e8 03 <42> 80 3c 30 00 74 08 48 89 df e8 28 a7 4c 00 48 8b 03 eb 07 e8 1e [ 24.713088][ T373] RSP: 0018:ffffc9000033fb40 EFLAGS: 00010806 [ 24.719129][ T373] RAX: 1ffff1122001c53f RBX: ffff8891000e29f8 RCX: 0000000000000002 [ 24.727075][ T373] RDX: 0000000000000000 RSI: 0000000000000086 RDI: 0000000000000001 [ 24.735022][ T373] RBP: ffffc9000033fb50 R08: ffff8881191e2dc0 R09: fffffbfff0bc26f9 [ 24.743055][ T373] R10: fffffbfff0bc26f9 R11: 1ffffffff0bc26f8 R12: dffffc0000000000 [ 24.751004][ T373] R13: ffff8881191e2dc0 R14: dffffc0000000000 R15: ffff8881191e32e0 [ 24.758962][ T373] FS: 0000000000000000(0000) GS:ffff8881f7200000(0000) knlGS:0000000000000000 [ 24.767866][ T373] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.774692][ T373] CR2: ffffed122001c53f CR3: 0000000119127000 CR4: 00000000003506b0 [ 24.782648][ T373] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.790600][ T373] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.798727][ T373] Kernel panic - not syncing: Fatal exception [ 25.898607][ T373] Shutting down cpus with NMI [ 25.903668][ T373] Kernel Offset: disabled [ 25.908131][ T373] Rebooting in 86400 seconds.. syzkaller build log: go env (err=) GO111MODULE="auto" GOARCH="amd64" GOBIN="" GOCACHE="/syzkaller/.cache/go-build" GOENV="/syzkaller/.config/go/env" GOEXE="" GOEXPERIMENT="" GOFLAGS="" GOHOSTARCH="amd64" GOHOSTOS="linux" GOINSECURE="" GOMODCACHE="/syzkaller/jobs/linux/gopath/pkg/mod" GONOPROXY="" GONOSUMDB="" GOOS="linux" GOPATH="/syzkaller/jobs/linux/gopath" GOPRIVATE="" GOPROXY="https://proxy.golang.org,direct" GOROOT="/usr/local/go" GOSUMDB="sum.golang.org" GOTMPDIR="" GOTOOLDIR="/usr/local/go/pkg/tool/linux_amd64" GOVCS="" GOVERSION="go1.17" GCCGO="gccgo" AR="ar" CC="gcc" CXX="g++" CGO_ENABLED="1" GOMOD="/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/go.mod" CGO_CFLAGS="-g -O2" CGO_CPPFLAGS="" CGO_CXXFLAGS="-g -O2" CGO_FFLAGS="-g -O2" CGO_LDFLAGS="-g -O2" PKG_CONFIG="pkg-config" GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build1775073316=/tmp/go-build -gno-record-gcc-switches" git status (err=) HEAD detached at c0b80a55c nothing to commit, working tree clean tput: No value for $TERM and no -T specified tput: No value for $TERM and no -T specified Makefile:32: run command via tools/syz-env for best compatibility, see: Makefile:33: https://github.com/google/syzkaller/blob/master/docs/contributing.md#using-syz-env go list -f '{{.Stale}}' ./sys/syz-sysgen | grep -q false || go install ./sys/syz-sysgen make .descriptions tput: No value for $TERM and no -T specified tput: No value for $TERM and no -T specified bin/syz-sysgen touch .descriptions GOOS=linux GOARCH=amd64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=c0b80a55c9c8cfe75e77c555ed0d4ae7aa373cc2 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20221021-135310'" "-tags=syz_target syz_os_linux syz_arch_amd64 " -o ./bin/linux_amd64/syz-fuzzer github.com/google/syzkaller/syz-fuzzer GOOS=linux GOARCH=amd64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=c0b80a55c9c8cfe75e77c555ed0d4ae7aa373cc2 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20221021-135310'" "-tags=syz_target syz_os_linux syz_arch_amd64 " -o ./bin/linux_amd64/syz-execprog github.com/google/syzkaller/tools/syz-execprog GOOS=linux GOARCH=amd64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=c0b80a55c9c8cfe75e77c555ed0d4ae7aa373cc2 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20221021-135310'" "-tags=syz_target syz_os_linux syz_arch_amd64 " -o ./bin/linux_amd64/syz-stress github.com/google/syzkaller/tools/syz-stress mkdir -p ./bin/linux_amd64 gcc -o ./bin/linux_amd64/syz-executor executor/executor.cc \ -m64 -O2 -pthread -Wall -Werror -Wparentheses -Wunused-const-variable -Wframe-larger-than=16384 -Wno-stringop-overflow -Wno-array-bounds -Wno-format-overflow -static-pie -fpermissive -w -DGOOS_linux=1 -DGOARCH_amd64=1 \ -DHOSTGOOS_linux=1 -DGIT_REVISION=\"c0b80a55c9c8cfe75e77c555ed0d4ae7aa373cc2\"