IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready 8021q: adding VLAN 0 to HW filter on device batadv0 ================================================================== BUG: KASAN: use-after-free in __read_once_size include/linux/compiler.h:183 [inline] BUG: KASAN: use-after-free in atomic_read arch/x86/include/asm/atomic.h:27 [inline] BUG: KASAN: use-after-free in refcount_inc_not_zero+0x66/0x70 lib/refcount.c:120 Read of size 4 at addr ffff8881eab58e00 by task syz-executor.0/6480 CPU: 0 PID: 6480 Comm: syz-executor.0 Not tainted 4.14.231-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0xf7/0x137 lib/dump_stack.c:58 print_address_description.cold.7+0x9/0x1c9 mm/kasan/report.c:252 kasan_report_error mm/kasan/report.c:351 [inline] kasan_report mm/kasan/report.c:409 [inline] kasan_report.cold.8+0x11a/0x2d3 mm/kasan/report.c:393 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report.c:429 __read_once_size include/linux/compiler.h:183 [inline] atomic_read arch/x86/include/asm/atomic.h:27 [inline] refcount_inc_not_zero+0x66/0x70 lib/refcount.c:120 refcount_inc+0x9/0x20 lib/refcount.c:153 sock_hold include/net/sock.h:619 [inline] nr_release+0x53/0x330 net/netrom/af_netrom.c:523 __sock_release+0xc2/0x2a0 net/socket.c:602 sock_close+0x10/0x20 net/socket.c:1139 __fput+0x232/0x750 fs/file_table.c:210 ____fput+0x9/0x10 fs/file_table.c:244 task_work_run+0xe5/0x170 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x16a/0x1b0 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x416/0x5b0 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x41482b RSP: 002b:00007ffe77b42fd0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 000000000041482b RDX: 0000000000000a30 RSI: 0000001b2eb200d8 RDI: 0000000000000004 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000001b2eb200e0 R10: 000d558ed60945e2 R11: 0000000000000293 R12: 000000000052c980 R13: 000000000052c980 R14: 000000000052c104 R15: 000000000052bf00 Allocated by task 6481: save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59 save_stack+0x43/0xd0 mm/kasan/kasan.c:447 set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc mm/kasan/kasan.c:551 [inline] kasan_kmalloc+0xc7/0xe0 mm/kasan/kasan.c:529 __do_kmalloc mm/slab.c:3720 [inline] __kmalloc+0x15b/0x7b0 mm/slab.c:3729 kmalloc include/linux/slab.h:493 [inline] sk_prot_alloc+0x146/0x240 net/core/sock.c:1467 sk_alloc+0x30/0xc50 net/core/sock.c:1521 nr_create+0x7e/0x5a0 net/netrom/af_netrom.c:436 __sock_create+0x262/0x540 net/socket.c:1275 sock_create net/socket.c:1315 [inline] SYSC_socket net/socket.c:1345 [inline] SyS_socket+0xc6/0x1a0 net/socket.c:1325 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb Freed by task 6480: save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59 save_stack+0x43/0xd0 mm/kasan/kasan.c:447 set_track mm/kasan/kasan.c:459 [inline] kasan_slab_free+0x71/0xc0 mm/kasan/kasan.c:524 __cache_free mm/slab.c:3496 [inline] kfree+0xcc/0x270 mm/slab.c:3815 sk_prot_free net/core/sock.c:1504 [inline] __sk_destruct+0x3e1/0x4e0 net/core/sock.c:1582 sk_destruct+0x83/0xb0 net/core/sock.c:1597 __sk_free+0x47/0x1f0 net/core/sock.c:1605 sk_free+0x23/0x30 net/core/sock.c:1616 sock_put include/net/sock.h:1662 [inline] nr_release+0x2a8/0x330 net/netrom/af_netrom.c:557 __sock_release+0xc2/0x2a0 net/socket.c:602 sock_close+0x10/0x20 net/socket.c:1139 __fput+0x232/0x750 fs/file_table.c:210 ____fput+0x9/0x10 fs/file_table.c:244 task_work_run+0xe5/0x170 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x16a/0x1b0 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x416/0x5b0 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x46/0xbb The buggy address belongs to the object at ffff8881eab58d80 which belongs to the cache kmalloc-2048 of size 2048 The buggy address is located 128 bytes inside of 2048-byte region [ffff8881eab58d80, ffff8881eab59580) The buggy address belongs to the page: page:ffffea0007aad600 count:1 mapcount:0 mapping:ffff8881eab58500 index:0x0 compound_mapcount: 0 flags: 0x2fffc0000008100(slab|head) raw: 02fffc0000008100 ffff8881eab58500 0000000000000000 0000000100000003 raw: ffffea0007a92da0 ffffea0007a947a0 ffff8881f6400c40 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8881eab58d00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8881eab58d80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8881eab58e00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8881eab58e80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881eab58f00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== refcount_t: increment on 0; use-after-free. ------------[ cut here ]------------ WARNING: CPU: 0 PID: 6480 at lib/refcount.c:153 refcount_inc lib/refcount.c:153 [inline] WARNING: CPU: 0 PID: 6480 at lib/refcount.c:153 refcount_inc.cold.12+0x13/0x1a lib/refcount.c:151 Modules linked in: CPU: 0 PID: 6480 Comm: syz-executor.0 Tainted: G B 4.14.231-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8881e44c4200 task.stack: ffff8881e6480000 RIP: 0010:refcount_inc lib/refcount.c:153 [inline] RIP: 0010:refcount_inc.cold.12+0x13/0x1a lib/refcount.c:151 RSP: 0018:ffff8881e6487d50 EFLAGS: 00010282 RAX: 000000000000002b RBX: ffff8881eab58d80 RCX: 0000000000000000 RDX: 000000000000002b RSI: ffffffff868cf1a0 RDI: ffffed103cc90fa1 RBP: ffff8881e6487d50 R08: 0000000000000000 R09: 0000000000000000 R10: fffffbfff126904b R11: dffffc0000000000 R12: ffff8881c98cc180 R13: ffff8881c98cc1a0 R14: ffff8881eab590e0 R15: ffff8881eab58e00 FS: 00000000012db400(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fbe87c88000 CR3: 00000001e66e3002 CR4: 00000000001606f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: sock_hold include/net/sock.h:619 [inline] nr_release+0x53/0x330 net/netrom/af_netrom.c:523 __sock_release+0xc2/0x2a0 net/socket.c:602 sock_close+0x10/0x20 net/socket.c:1139 __fput+0x232/0x750 fs/file_table.c:210 ____fput+0x9/0x10 fs/file_table.c:244 task_work_run+0xe5/0x170 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x16a/0x1b0 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x416/0x5b0 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x41482b RSP: 002b:00007ffe77b42fd0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 000000000041482b RDX: 0000000000000a30 RSI: 0000001b2eb200d8 RDI: 0000000000000004 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000001b2eb200e0 R10: 000d558ed60945e2 R11: 0000000000000293 R12: 000000000052c980 R13: 000000000052c980 R14: 000000000052c104 R15: 000000000052bf00 Code: c6 05 aa 89 2e 02 01 e8 16 46 fa ff 0f 0b b8 01 00 00 00 e9 11 af b9 fc 48 c7 c7 60 f6 bc 86 c6 05 8a 89 2e 02 01 e8 f7 45 fa ff <0f> 0b e9 29 af b9 fc 48 c7 c7 c0 f6 bc 86 c6 05 6f 89 2e 02 01 ---[ end trace 3da2d25ae576cf3f ]--- ODEBUG: assert_init not available (active state 0) object type: timer_list hint: nr_t1timer_expiry+0x0/0x2f0 net/netrom/nr_timer.c:161 ------------[ cut here ]------------ WARNING: CPU: 0 PID: 6480 at lib/debugobjects.c:290 debug_print_object.cold.13+0xa7/0xdb lib/debugobjects.c:287 Modules linked in: CPU: 0 PID: 6480 Comm: syz-executor.0 Tainted: G B W 4.14.231-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8881e44c4200 task.stack: ffff8881e6480000 RIP: 0010:debug_print_object.cold.13+0xa7/0xdb lib/debugobjects.c:287 RSP: 0018:ffff8881e6487b68 EFLAGS: 00010286 RAX: 000000000000006c RBX: 0000000000000005 RCX: 0000000000000000 RDX: 000000000000006c RSI: ffffffff868cf1a0 RDI: ffffed103cc90f64 RBP: ffff8881e6487b90 R08: 0000000000000000 R09: 0000000000000000 R10: fffffbfff1269053 R11: dffffc0000000000 R12: ffffffff868ca3e0 R13: ffffffff85644ee0 R14: 0000000000000000 R15: ffffffff8799bae0 FS: 00000000012db400(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000502000 CR3: 00000001e66e3002 CR4: 00000000001606f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: debug_object_assert_init lib/debugobjects.c:656 [inline] debug_object_assert_init+0x24d/0x370 lib/debugobjects.c:627 debug_timer_assert_init kernel/time/timer.c:708 [inline] debug_assert_init kernel/time/timer.c:756 [inline] del_timer+0x6c/0xf0 kernel/time/timer.c:1151 sk_stop_timer+0x10/0x30 net/core/sock.c:2702 nr_stop_t1timer+0x10/0x20 net/netrom/nr_timer.c:88 nr_disconnect+0x12/0x180 net/netrom/nr_subr.c:264 nr_release+0x293/0x330 net/netrom/af_netrom.c:532 __sock_release+0xc2/0x2a0 net/socket.c:602 sock_close+0x10/0x20 net/socket.c:1139 __fput+0x232/0x750 fs/file_table.c:210 ____fput+0x9/0x10 fs/file_table.c:244 task_work_run+0xe5/0x170 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x16a/0x1b0 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x416/0x5b0 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x41482b RSP: 002b:00007ffe77b42fd0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 000000000041482b RDX: 0000000000000a30 RSI: 0000001b2eb200d8 RDI: 0000000000000004 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000001b2eb200e0 R10: 000d558ed60945e2 R11: 0000000000000293 R12: 000000000052c980 R13: 000000000052c980 R14: 000000000052c104 R15: 000000000052bf00 Code: 86 48 89 fa 48 c1 ea 03 80 3c 02 00 75 42 48 8b 14 dd 00 1c bd 86 4d 89 e9 4d 89 e0 44 89 f1 48 c7 c7 20 12 bd 86 e8 df 43 fa ff <0f> 0b e9 c7 9f ba fc 48 89 75 d8 e8 4b c6 6d fb 48 8b 75 d8 eb ---[ end trace 3da2d25ae576cf40 ]--- ODEBUG: assert_init not available (active state 0) object type: timer_list hint: nr_t2timer_expiry+0x0/0x80 net/netrom/nr_timer.c:173 ------------[ cut here ]------------ WARNING: CPU: 0 PID: 6480 at lib/debugobjects.c:290 debug_print_object.cold.13+0xa7/0xdb lib/debugobjects.c:287 Modules linked in: CPU: 0 PID: 6480 Comm: syz-executor.0 Tainted: G B W 4.14.231-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8881e44c4200 task.stack: ffff8881e6480000 RIP: 0010:debug_print_object.cold.13+0xa7/0xdb lib/debugobjects.c:287 RSP: 0018:ffff8881e6487b68 EFLAGS: 00010286 RAX: 000000000000006b RBX: 0000000000000005 RCX: 0000000000000000 RDX: 000000000000006b RSI: ffffffff868cf1a0 RDI: ffffed103cc90f64 RBP: ffff8881e6487b90 R08: 0000000000000000 R09: 0000000000000000 R10: fffffbfff1269053 R11: dffffc0000000000 R12: ffffffff868ca3e0 R13: ffffffff85644e60 R14: 0000000000000000 R15: ffffffff8799bae0 FS: 00000000012db400(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000502000 CR3: 00000001e66e3002 CR4: 00000000001606f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: debug_object_assert_init lib/debugobjects.c:656 [inline] debug_object_assert_init+0x24d/0x370 lib/debugobjects.c:627 debug_timer_assert_init kernel/time/timer.c:708 [inline] debug_assert_init kernel/time/timer.c:756 [inline] del_timer+0x6c/0xf0 kernel/time/timer.c:1151 sk_stop_timer+0x10/0x30 net/core/sock.c:2702 nr_stop_t2timer+0x10/0x20 net/netrom/nr_timer.c:93 nr_disconnect+0x1a/0x180 net/netrom/nr_subr.c:265 nr_release+0x293/0x330 net/netrom/af_netrom.c:532 __sock_release+0xc2/0x2a0 net/socket.c:602 sock_close+0x10/0x20 net/socket.c:1139 __fput+0x232/0x750 fs/file_table.c:210 ____fput+0x9/0x10 fs/file_table.c:244 task_work_run+0xe5/0x170 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x16a/0x1b0 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x416/0x5b0 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x41482b RSP: 002b:00007ffe77b42fd0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 000000000041482b RDX: 0000000000000a30 RSI: 0000001b2eb200d8 RDI: 0000000000000004 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000001b2eb200e0 R10: 000d558ed60945e2 R11: 0000000000000293 R12: 000000000052c980 R13: 000000000052c980 R14: 000000000052c104 R15: 000000000052bf00 Code: 86 48 89 fa 48 c1 ea 03 80 3c 02 00 75 42 48 8b 14 dd 00 1c bd 86 4d 89 e9 4d 89 e0 44 89 f1 48 c7 c7 20 12 bd 86 e8 df 43 fa ff <0f> 0b e9 c7 9f ba fc 48 89 75 d8 e8 4b c6 6d fb 48 8b 75 d8 eb ---[ end trace 3da2d25ae576cf41 ]--- ODEBUG: assert_init not available (active state 0) object type: timer_list hint: nr_t4timer_expiry+0x0/0x60 ------------[ cut here ]------------ WARNING: CPU: 0 PID: 6480 at lib/debugobjects.c:290 debug_print_object.cold.13+0xa7/0xdb lib/debugobjects.c:287 Modules linked in: CPU: 0 PID: 6480 Comm: syz-executor.0 Tainted: G B W 4.14.231-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8881e44c4200 task.stack: ffff8881e6480000 RIP: 0010:debug_print_object.cold.13+0xa7/0xdb lib/debugobjects.c:287 RSP: 0018:ffff8881e6487b68 EFLAGS: 00010286 RAX: 000000000000006b RBX: 0000000000000005 RCX: 0000000000000000 RDX: 000000000000006b RSI: ffffffff868cf1a0 RDI: ffffed103cc90f64 RBP: ffff8881e6487b90 R08: 0000000000000000 R09: 0000000000000000 R10: fffffbfff1269053 R11: dffffc0000000000 R12: ffffffff868ca3e0 R13: ffffffff85644e00 R14: 0000000000000000 R15: ffffffff8799bae0 FS: 00000000012db400(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000502000 CR3: 00000001e66e3002 CR4: 00000000001606f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: debug_object_assert_init lib/debugobjects.c:656 [inline] debug_object_assert_init+0x24d/0x370 lib/debugobjects.c:627 debug_timer_assert_init kernel/time/timer.c:708 [inline] debug_assert_init kernel/time/timer.c:756 [inline] del_timer+0x6c/0xf0 kernel/time/timer.c:1151 sk_stop_timer+0x10/0x30 net/core/sock.c:2702 nr_stop_t4timer+0x10/0x20 net/netrom/nr_timer.c:98 nr_disconnect+0x22/0x180 net/netrom/nr_subr.c:266 nr_release+0x293/0x330 net/netrom/af_netrom.c:532 __sock_release+0xc2/0x2a0 net/socket.c:602 sock_close+0x10/0x20 net/socket.c:1139 __fput+0x232/0x750 fs/file_table.c:210 ____fput+0x9/0x10 fs/file_table.c:244 task_work_run+0xe5/0x170 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x16a/0x1b0 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x416/0x5b0 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x41482b RSP: 002b:00007ffe77b42fd0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 000000000041482b RDX: 0000000000000a30 RSI: 0000001b2eb200d8 RDI: 0000000000000004 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000001b2eb200e0 R10: 000d558ed60945e2 R11: 0000000000000293 R12: 000000000052c980 R13: 000000000052c980 R14: 000000000052c104 R15: 000000000052bf00 Code: 86 48 89 fa 48 c1 ea 03 80 3c 02 00 75 42 48 8b 14 dd 00 1c bd 86 4d 89 e9 4d 89 e0 44 89 f1 48 c7 c7 20 12 bd 86 e8 df 43 fa ff <0f> 0b e9 c7 9f ba fc 48 89 75 d8 e8 4b c6 6d fb 48 8b 75 d8 eb ---[ end trace 3da2d25ae576cf42 ]--- ODEBUG: assert_init not available (active state 0) object type: timer_list hint: nr_idletimer_expiry+0x0/0x280 arch/x86/include/asm/bitops.h:328 ------------[ cut here ]------------ WARNING: CPU: 0 PID: 6480 at lib/debugobjects.c:290 debug_print_object.cold.13+0xa7/0xdb lib/debugobjects.c:287 Modules linked in: CPU: 0 PID: 6480 Comm: syz-executor.0 Tainted: G B W 4.14.231-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8881e44c4200 task.stack: ffff8881e6480000 RIP: 0010:debug_print_object.cold.13+0xa7/0xdb lib/debugobjects.c:287 RSP: 0018:ffff8881e6487b68 EFLAGS: 00010286 RAX: 000000000000006e RBX: 0000000000000005 RCX: 0000000000000000 RDX: 000000000000006e RSI: ffffffff868cf1a0 RDI: ffffed103cc90f64 RBP: ffff8881e6487b90 R08: 0000000000000000 R09: 0000000000000000 R10: fffffbfff1269053 R11: dffffc0000000000 R12: ffffffff868ca3e0 R13: ffffffff856454e0 R14: 0000000000000000 R15: ffffffff8799bae0 FS: 00000000012db400(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000502000 CR3: 00000001e66e3002 CR4: 00000000001606f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: debug_object_assert_init lib/debugobjects.c:656 [inline] debug_object_assert_init+0x24d/0x370 lib/debugobjects.c:627 debug_timer_assert_init kernel/time/timer.c:708 [inline] debug_assert_init kernel/time/timer.c:756 [inline] del_timer+0x6c/0xf0 kernel/time/timer.c:1151 sk_stop_timer+0x10/0x30 net/core/sock.c:2702 nr_stop_idletimer+0x10/0x20 net/netrom/nr_timer.c:103 nr_disconnect+0x2a/0x180 net/netrom/nr_subr.c:267 nr_release+0x293/0x330 net/netrom/af_netrom.c:532 __sock_release+0xc2/0x2a0 net/socket.c:602 sock_close+0x10/0x20 net/socket.c:1139 __fput+0x232/0x750 fs/file_table.c:210 ____fput+0x9/0x10 fs/file_table.c:244 task_work_run+0xe5/0x170 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x16a/0x1b0 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x416/0x5b0 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x41482b RSP: 002b:00007ffe77b42fd0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 000000000041482b RDX: 0000000000000a30 RSI: 0000001b2eb200d8 RDI: 0000000000000004 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000001b2eb200e0 R10: 000d558ed60945e2 R11: 0000000000000293 R12: 000000000052c980 R13: 000000000052c980 R14: 000000000052c104 R15: 000000000052bf00 Code: 86 48 89 fa 48 c1 ea 03 80 3c 02 00 75 42 48 8b 14 dd 00 1c bd 86 4d 89 e9 4d 89 e0 44 89 f1 48 c7 c7 20 12 bd 86 e8 df 43 fa ff <0f> 0b e9 c7 9f ba fc 48 89 75 d8 e8 4b c6 6d fb 48 8b 75 d8 eb ---[ end trace 3da2d25ae576cf43 ]--- ODEBUG: assert_init not available (active state 0) object type: timer_list hint: nr_heartbeat_expiry+0x0/0x310 net/netrom/nr_timer.c:56 ------------[ cut here ]------------ WARNING: CPU: 0 PID: 6480 at lib/debugobjects.c:290 debug_print_object.cold.13+0xa7/0xdb lib/debugobjects.c:287 Modules linked in: CPU: 0 PID: 6480 Comm: syz-executor.0 Tainted: G B W 4.14.231-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8881e44c4200 task.stack: ffff8881e6480000 RIP: 0010:debug_print_object.cold.13+0xa7/0xdb lib/debugobjects.c:287 RSP: 0018:ffff8881e6487b58 EFLAGS: 00010282 RAX: 000000000000006e RBX: 0000000000000005 RCX: 0000000000000000 RDX: 000000000000006e RSI: ffffffff868cf1a0 RDI: ffffed103cc90f62 RBP: ffff8881e6487b80 R08: 0000000000000000 R09: 0000000000000000 R10: fffffbfff1269053 R11: dffffc0000000000 R12: ffffffff868ca3e0 R13: ffffffff856451d0 R14: 0000000000000000 R15: ffffffff8799bae0 FS: 00000000012db400(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000502000 CR3: 00000001e66e3003 CR4: 00000000001606f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: debug_object_assert_init lib/debugobjects.c:656 [inline] debug_object_assert_init+0x24d/0x370 lib/debugobjects.c:627 debug_timer_assert_init kernel/time/timer.c:708 [inline] debug_assert_init kernel/time/timer.c:756 [inline] del_timer+0x6c/0xf0 kernel/time/timer.c:1151 sk_stop_timer+0x10/0x30 net/core/sock.c:2702 nr_stop_heartbeat+0x10/0x20 net/netrom/nr_timer.c:108 nr_destroy_socket+0x12f/0x3f0 net/netrom/af_netrom.c:266 nr_release+0x29b/0x330 net/netrom/af_netrom.c:533 __sock_release+0xc2/0x2a0 net/socket.c:602 sock_close+0x10/0x20 net/socket.c:1139 __fput+0x232/0x750 fs/file_table.c:210 ____fput+0x9/0x10 fs/file_table.c:244 task_work_run+0xe5/0x170 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x16a/0x1b0 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x416/0x5b0 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x41482b RSP: 002b:00007ffe77b42fd0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 000000000041482b RDX: 0000000000000a30 RSI: 0000001b2eb200d8 RDI: 0000000000000004 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000001b2eb200e0 R10: 000d558ed60945e2 R11: 0000000000000293 R12: 000000000052c980 R13: 000000000052c980 R14: 000000000052c104 R15: 000000000052bf00 Code: 86 48 89 fa 48 c1 ea 03 80 3c 02 00 75 42 48 8b 14 dd 00 1c bd 86 4d 89 e9 4d 89 e0 44 89 f1 48 c7 c7 20 12 bd 86 e8 df 43 fa ff <0f> 0b e9 c7 9f ba fc 48 89 75 d8 e8 4b c6 6d fb 48 8b 75 d8 eb ---[ end trace 3da2d25ae576cf44 ]--- refcount_t: underflow; use-after-free. ------------[ cut here ]------------ WARNING: CPU: 0 PID: 6480 at lib/refcount.c:187 refcount_sub_and_test lib/refcount.c:187 [inline] WARNING: CPU: 0 PID: 6480 at lib/refcount.c:187 refcount_sub_and_test.cold.13+0x13/0x1a lib/refcount.c:177 Modules linked in: CPU: 0 PID: 6480 Comm: syz-executor.0 Tainted: G B W 4.14.231-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8881e44c4200 task.stack: ffff8881e6480000 RIP: 0010:refcount_sub_and_test lib/refcount.c:187 [inline] RIP: 0010:refcount_sub_and_test.cold.13+0x13/0x1a lib/refcount.c:177 RSP: 0018:ffff8881e6487d30 EFLAGS: 00010286 RAX: 0000000000000026 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000026 RSI: ffffffff868cf1a0 RDI: ffffed103cc90f9d RBP: ffff8881e6487d40 R08: 0000000000000000 R09: 0000000000000000 R10: fffffbfff126904a R11: dffffc0000000000 R12: ffff8881c98cc180 R13: ffff8881c98cc1a0 R14: ffff8881eab591f4 R15: ffff8881eab58e00 FS: 00000000012db400(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000502000 CR3: 00000001e66e3003 CR4: 00000000001606f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: refcount_dec_and_test+0x11/0x20 lib/refcount.c:212 sock_put include/net/sock.h:1661 [inline] nr_release+0x142/0x330 net/netrom/af_netrom.c:557 __sock_release+0xc2/0x2a0 net/socket.c:602 sock_close+0x10/0x20 net/socket.c:1139 __fput+0x232/0x750 fs/file_table.c:210 ____fput+0x9/0x10 fs/file_table.c:244 task_work_run+0xe5/0x170 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x16a/0x1b0 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x416/0x5b0 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x41482b RSP: 002b:00007ffe77b42fd0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 000000000041482b RDX: 0000000000000a30 RSI: 0000001b2eb200d8 RDI: 0000000000000004 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000001b2eb200e0 R10: 000d558ed60945e2 R11: 0000000000000293 R12: 000000000052c980 R13: 000000000052c980 R14: 000000000052c104 R15: 000000000052bf00 Code: c7 60 f6 bc 86 c6 05 8a 89 2e 02 01 e8 f7 45 fa ff 0f 0b e9 29 af b9 fc 48 c7 c7 c0 f6 bc 86 c6 05 6f 89 2e 02 01 e8 dd 45 fa ff <0f> 0b e9 74 af b9 fc 48 c7 c7 20 f7 bc 86 c6 05 54 89 2e 02 01 ---[ end trace 3da2d25ae576cf45 ]--- IPVS: ftp: loaded support on port[0] = 21 kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN Modules linked in: CPU: 0 PID: 0 Comm: swapper/0 Tainted: G B W 4.14.231-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffffffff878757c0 task.stack: ffffffff87800000 RIP: 0010:__read_once_size include/linux/compiler.h:183 [inline] RIP: 0010:debug_spin_lock_before kernel/locking/spinlock_debug.c:83 [inline] RIP: 0010:do_raw_spin_lock+0x27/0x230 kernel/locking/spinlock_debug.c:112 RSP: 0018:ffff8881f6807cf0 EFLAGS: 00010207 RAX: dffffc0000000000 RBX: 0000000000000088 RCX: 0000000000000000 RDX: 0000000000000011 RSI: 0000000000000000 RDI: 000000000000008c RBP: ffff8881f6807d18 R08: 0000000000000001 R09: 0000000000000000 R10: ffffed1047fff201 R11: ffffffff878757c0 R12: ffff8881f6807df0 R13: 0000000000000088 R14: 1ffff1103ed00fb2 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fee792b2718 CR3: 000000000786a002 CR4: 00000000001606f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __raw_spin_lock include/linux/spinlock_api_smp.h:143 [inline] _raw_spin_lock+0x35/0x40 kernel/locking/spinlock.c:152 spin_lock include/linux/spinlock.h:317 [inline] nr_destroy_timer+0x1b/0x60 net/netrom/af_netrom.c:247 call_timer_fn+0x142/0x570 kernel/time/timer.c:1280 expire_timers kernel/time/timer.c:1319 [inline] __run_timers kernel/time/timer.c:1637 [inline] __run_timers kernel/time/timer.c:1605 [inline] run_timer_softirq+0xc99/0x1210 kernel/time/timer.c:1650 __do_softirq+0x247/0x9a2 kernel/softirq.c:288 invoke_softirq kernel/softirq.c:368 [inline] irq_exit+0x15f/0x1a0 kernel/softirq.c:409 exiting_irq arch/x86/include/asm/apic.h:638 [inline] smp_apic_timer_interrupt+0x149/0x5d0 arch/x86/kernel/apic/apic.c:1106 apic_timer_interrupt+0x9a/0xa0 arch/x86/entry/entry_64.S:793 RIP: 0010:native_safe_halt+0x12/0x20 arch/x86/include/asm/irqflags.h:61 RSP: 0018:ffffffff87807dc0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff10 RAX: dffffc0000000000 RBX: ffffffff878757c0 RCX: 0000000000000000 RDX: 1ffffffff0f22c64 RSI: ffffffff86bd0e00 RDI: ffffffff87916320 RBP: ffffffff87807dc0 R08: 1ffffffff108bf01 R09: ffffffff814f98d3 R10: 0000000000000002 R11: 0000000e6e4bbf00 R12: ffffffff87916310 R13: ffffffff884615e0 R14: 0000000000000000 R15: ffffffff87916300 arch_safe_halt arch/x86/include/asm/paravirt.h:94 [inline] default_idle+0x4f/0x370 arch/x86/kernel/process.c:558 arch_cpu_idle+0xa/0x10 arch/x86/kernel/process.c:549 default_idle_call+0x6d/0x90 kernel/sched/idle.c:98 cpuidle_idle_call kernel/sched/idle.c:156 [inline] do_idle+0x311/0x3d0 kernel/sched/idle.c:246 cpu_startup_entry+0x18/0x20 kernel/sched/idle.c:351 rest_init+0x193/0x199 init/main.c:434 start_kernel+0x4ff/0x525 init/main.c:708 x86_64_start_reservations+0x29/0x2b arch/x86/kernel/head64.c:399 x86_64_start_kernel+0x76/0x79 arch/x86/kernel/head64.c:380 secondary_startup_64+0xa5/0xb0 arch/x86/kernel/head_64.S:240 Code: 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 41 56 41 55 41 54 53 48 89 fb 48 83 c7 04 48 89 fa 48 83 ec 08 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 RIP: __read_once_size include/linux/compiler.h:183 [inline] RSP: ffff8881f6807cf0 RIP: debug_spin_lock_before kernel/locking/spinlock_debug.c:83 [inline] RSP: ffff8881f6807cf0 RIP: do_raw_spin_lock+0x27/0x230 kernel/locking/spinlock_debug.c:112 RSP: ffff8881f6807cf0 ---[ end trace 3da2d25ae576cf46 ]---