bisecting fixing commit since aec3002d07fd2564cd32e56f126fa6db14a168bb building syzkaller on 907bf74686129436f81aa40336ee89f7cc01b0b4 testing commit aec3002d07fd2564cd32e56f126fa6db14a168bb compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 6eb8eeaedb68e9397b47190d3dd8befb619e9b9853f2fe717e8c30ae9c1c2ff6 all runs: crashed: WARNING in perf_group_attach testing current HEAD 4938296e03bd227e5020d63d418956fe52baf97c testing commit 4938296e03bd227e5020d63d418956fe52baf97c compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 966292b1a969715d0b0d6a387d2d26d6eb708aca08b2df7b17f147d67af9b9a9 all runs: crashed: WARNING in perf_group_attach revisions tested: 2, total time: 26m18.213822261s (build: 18m39.837472945s, test: 6m39.858075857s) the crash still happens on HEAD commit msg: Linux 4.19.198 crash: WARNING in perf_group_attach IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready 8021q: adding VLAN 0 to HW filter on device batadv0 8021q: adding VLAN 0 to HW filter on device batadv0 WARNING: CPU: 0 PID: 53 at kernel/events/core.c:1840 perf_group_attach+0x3b1/0x470 kernel/events/core.c:1832 Modules linked in: CPU: 0 PID: 53 Comm: kworker/u4:2 Not tainted 4.19.198-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_nc_worker RIP: 0010:perf_group_attach+0x3b1/0x470 kernel/events/core.c:1840 Code: ec 10 4c 39 e3 75 d7 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 2e 58 1d 00 e9 c8 fc ff ff e8 24 58 1d 00 e9 fe fc ff ff <0f> 0b e9 75 fd ff ff e8 33 58 1d 00 eb c1 e8 2c 58 1d 00 e9 6d fc RSP: 0018:ffff8881f6807ec0 EFLAGS: 00010006 RAX: dffffc0000000000 RBX: ffff8881d73785c0 RCX: 1ffff1103c0e7d3a RDX: 1ffff1103c0e7d63 RSI: ffff8881f6831460 RDI: ffff8881e073eb18 RBP: ffff8881f6807ef0 R08: ffffffff890a7018 R09: 0000000000000006 R10: fffffbfff1214e01 R11: 0000000000000001 R12: ffff8881e073e900 R13: ffffe8ffffc11bd0 R14: 0000000000000000 R15: ffff8881f6831448 FS: 0000000000000000(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f134c47b740 CR3: 000000000806d002 CR4: 00000000001606f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 000000000011060a Call Trace: add_event_to_ctx kernel/events/core.c:2399 [inline] __perf_install_in_context+0x3f6/0x880 kernel/events/core.c:2540 remote_function kernel/events/core.c:87 [inline] remote_function+0xff/0x180 kernel/events/core.c:67 flush_smp_call_function_queue+0x10e/0x3d0 kernel/smp.c:243 generic_smp_call_function_single_interrupt+0xe/0x20 kernel/smp.c:192 smp_call_function_single_interrupt+0xa0/0x440 arch/x86/kernel/smp.c:304 call_function_single_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:916 RIP: 0010:should_resched arch/x86/include/asm/preempt.h:99 [inline] RIP: 0010:__local_bh_enable_ip+0x193/0x260 kernel/softirq.c:196 Code: 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 c8 00 00 00 48 83 3d ce 66 d7 06 00 74 5b fb 66 0f 1f 44 00 00 <65> 8b 05 76 53 c7 7e 85 c0 75 05 e8 87 b6 c5 ff 5b 41 5c 41 5d 5d RSP: 0018:ffff8881f51d7c50 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff04 RAX: dffffc0000000000 RBX: 0000000000000201 RCX: 1ffff1103ea389f2 RDX: 1ffffffff1024023 RSI: ffff8881f51c4f70 RDI: ffffffff88120118 RBP: ffff8881f51d7c68 R08: ffff8881f51c4f90 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff86590aa6 R13: ffff8881f51c46c0 R14: 0000000000000000 R15: ffff8881e9459480 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:176 [inline] _raw_spin_unlock_bh+0x30/0x40 kernel/locking/spinlock.c:200 spin_unlock_bh include/linux/spinlock.h:374 [inline] batadv_nc_purge_paths+0x1d6/0x2f0 net/batman-adv/network-coding.c:482 batadv_nc_worker+0x225/0x630 net/batman-adv/network-coding.c:733 process_one_work+0x830/0x1670 kernel/workqueue.c:2153 worker_thread+0x85/0xb60 kernel/workqueue.c:2296 kthread+0x347/0x410 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 irq event stamp: 1738726 hardirqs last enabled at (1738725): [] __local_bh_enable_ip+0x160/0x260 kernel/softirq.c:194 hardirqs last disabled at (1738726): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (1738724): [] spin_unlock_bh include/linux/spinlock.h:374 [inline] softirqs last enabled at (1738724): [] batadv_nc_purge_paths+0x1d6/0x2f0 net/batman-adv/network-coding.c:482 softirqs last disabled at (1738722): [] spin_lock_bh include/linux/spinlock.h:334 [inline] softirqs last disabled at (1738722): [] batadv_nc_purge_paths+0xc0/0x2f0 net/batman-adv/network-coding.c:453 ---[ end trace 862841cbf98db36d ]--- WARNING: CPU: 0 PID: 3295 at kernel/events/core.c:1999 INIT_LIST_HEAD include/linux/list.h:29 [inline] WARNING: CPU: 0 PID: 3295 at kernel/events/core.c:1999 list_del_init include/linux/list.h:160 [inline] WARNING: CPU: 0 PID: 3295 at kernel/events/core.c:1999 perf_event_ctx_deactivate kernel/events/core.c:1175 [inline] WARNING: CPU: 0 PID: 3295 at kernel/events/core.c:1999 event_sched_out.isra.99+0x69b/0x970 kernel/events/core.c:2026 Modules linked in: CPU: 0 PID: 3295 Comm: systemd-journal Tainted: G W 4.19.198-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:event_sched_out.isra.99+0x69b/0x970 kernel/events/core.c:1999 Code: 89 9d c0 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 5d 02 00 00 49 89 9d c8 00 00 00 e9 39 fd ff ff <0f> 0b e9 ac f9 ff ff 65 48 8b 1c 25 40 ee 01 00 48 8d bb 84 08 00 RSP: 0018:ffff8881f6807dd8 EFLAGS: 00010083 RAX: dffffc0000000000 RBX: ffff8881d73785c0 RCX: ffffe8ffffc11bd0 RDX: 1ffff1103c0e7d63 RSI: ffffe8ffffc11d68 RDI: ffff8881e073eb18 RBP: ffff8881f6807e28 R08: ffffed103e5a9e81 R09: ffffed103e5a9e80 R10: ffffed103e5a9e80 R11: ffff8881f2d4f403 R12: ffffe8ffffc11bd0 R13: ffffe8ffffc11bd0 R14: ffff8881e073e900 R15: ffff8881e073e900 FS: 00007f4db8ef28c0(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4db6297028 CR3: 00000001e23cb005 CR4: 00000000001606f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 000000000011060a Call Trace: group_sched_out.part.100+0x17b/0x1f0 kernel/events/core.c:2053 group_sched_out kernel/events/core.c:2042 [inline] ctx_sched_out+0x6a0/0x980 kernel/events/core.c:2964 cpu_ctx_sched_out kernel/events/core.c:3254 [inline] ctx_resched+0xc4/0xe0 kernel/events/core.c:2479 __perf_install_in_context+0x40d/0x880 kernel/events/core.c:2541 remote_function kernel/events/core.c:87 [inline] remote_function+0xff/0x180 kernel/events/core.c:67 flush_smp_call_function_queue+0x10e/0x3d0 kernel/smp.c:243 generic_smp_call_function_single_interrupt+0xe/0x20 kernel/smp.c:192 smp_call_function_single_interrupt+0xa0/0x440 arch/x86/kernel/smp.c:304 call_function_single_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:916 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline] RIP: 0010:kmem_cache_free+0xb0/0x290 mm/slab.c:3766 Code: 84 e6 00 00 00 41 f7 c5 00 02 00 00 0f 84 b7 00 00 00 e8 93 2d d5 ff 48 83 3d 73 d7 81 06 00 0f 84 cd 01 00 00 4c 89 ef 57 9d <0f> 1f 44 00 00 4c 8b 6d 08 0f 1f 44 00 00 65 8b 05 7b 57 71 7e 83 RSP: 0018:ffff8881e1bf7b88 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff04 RAX: 0000000000000007 RBX: ffff8881f6554d80 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000286 RBP: ffff8881e1bf7ba8 R08: 0000000000000050 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8881d61d2d00 R13: 0000000000000286 R14: ffffffff819b8a78 R15: ffff8881e1bf7c20 putname+0xa8/0xe0 fs/namei.c:261 filename_parentat.isra.55.part.56+0x310/0x400 fs/namei.c:2399 filename_parentat fs/namei.c:3619 [inline] filename_create+0xab/0x410 fs/namei.c:3621 user_path_create fs/namei.c:3696 [inline] do_mkdirat+0xae/0x220 fs/namei.c:3834 __do_sys_mkdir fs/namei.c:3858 [inline] __se_sys_mkdir fs/namei.c:3856 [inline] __x64_sys_mkdir+0x57/0x80 fs/namei.c:3856 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f4db81ad687 Code: 00 b8 ff ff ff ff c3 0f 1f 40 00 48 8b 05 09 d8 2b 00 64 c7 00 5f 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d e1 d7 2b 00 f7 d8 64 89 01 48 RSP: 002b:00007ffcfda22568 EFLAGS: 00000293 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffcfda255d0 RCX: 00007f4db81ad687 RDX: 0000000000000000 RSI: 00000000000001ed RDI: 000055ad9f82e8a0 RBP: 00007ffcfda225a0 R08: 000055ad9f40d3e5 R09: 0000000000000018 R10: 0000000000000069 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000001 R14: 000055ad9f82e8a0 R15: 00007ffcfda22be0 irq event stamp: 457722 hardirqs last enabled at (457721): [] kmem_cache_free+0x9d/0x290 mm/slab.c:3766 hardirqs last disabled at (457722): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (396926): [] __do_softirq+0x62d/0x919 kernel/softirq.c:318 softirqs last disabled at (396843): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (396843): [] irq_exit+0x17f/0x1c0 kernel/softirq.c:412 ---[ end trace 862841cbf98db36e ]--- WARNING: CPU: 0 PID: 0 at kernel/events/core.c:1943 perf_group_detach+0x65f/0x970 kernel/events/core.c:1900 Modules linked in: CPU: 0 PID: 0 Comm: swapper/0 Tainted: G W 4.19.198-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:perf_group_detach+0x65f/0x970 kernel/events/core.c:1943 Code: b8 be ff ff ff ff 48 8d 78 20 e8 bc 51 d7 ff 85 c0 0f 85 38 fa ff ff 48 c7 c7 a0 fc f0 86 e8 a8 f0 fe 04 0f 0b e9 25 fa ff ff <0f> 0b e9 62 fb ff ff 49 8d 7c 24 10 48 b8 00 00 00 00 00 fc ff df RSP: 0018:ffff8881f6807e18 EFLAGS: 00010083 RAX: ffffed103ae6f0fb RBX: ffff8881e073e900 RCX: ffffe8ffffc11bd0 RDX: ffffe8ffffc11ce0 RSI: ffff8881e073f1a0 RDI: ffff8881e073eb18 RBP: ffff8881f6807e90 R08: 0000000000000000 R09: ffff8881e073f1a0 R10: ffff8881e073e920 R11: ffffe8ffffc11ce8 R12: dffffc0000000000 R13: ffff8881d73785c0 R14: ffff8881f6831440 R15: ffff8881d73785c0 FS: 0000000000000000(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4db62a2000 CR3: 000000000806d001 CR4: 00000000001606f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 000000000111062a Call Trace: __perf_remove_from_context+0x1d4/0x440 kernel/events/core.c:2084 event_function+0x2bb/0x3d0 kernel/events/core.c:248 remote_function kernel/events/core.c:87 [inline] remote_function+0xff/0x180 kernel/events/core.c:67 flush_smp_call_function_queue+0x10e/0x3d0 kernel/smp.c:243 generic_smp_call_function_single_interrupt+0xe/0x20 kernel/smp.c:192 smp_call_function_single_interrupt+0xa0/0x440 arch/x86/kernel/smp.c:304 call_function_single_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:916 RIP: 0010:native_safe_halt+0x12/0x20 arch/x86/include/asm/irqflags.h:61 Code: 11 ff ff ff 4c 89 e7 e8 5c be 07 fb eb 97 90 90 90 90 90 90 90 90 90 90 55 48 89 e5 e9 07 00 00 00 0f 00 2d 30 b0 5e 00 fb f4 <5d> c3 66 66 2e 0f 1f 84 00 00 00 00 00 90 55 48 89 e5 e9 07 00 00 RSP: 0018:ffffffff88007c88 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff04 RAX: dffffc0000000000 RBX: ffffffff88079300 RCX: 0000000000000000 RDX: 1ffffffff1024024 RSI: 0000000000000001 RDI: ffffffff88120120 RBP: ffffffff88007c88 R08: ffffed103ed04733 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffffffff88120110 R14: ffffffff88d385e0 R15: 0000000000000000 arch_safe_halt arch/x86/include/asm/paravirt.h:94 [inline] default_idle+0x51/0x310 arch/x86/kernel/process.c:557 arch_cpu_idle+0xa/0x10 arch/x86/kernel/process.c:548 default_idle_call+0x6d/0x90 kernel/sched/idle.c:93 cpuidle_idle_call kernel/sched/idle.c:153 [inline] do_idle+0x41e/0x560 kernel/sched/idle.c:263 cpu_startup_entry+0xc8/0xe0 kernel/sched/idle.c:369 rest_init+0x193/0x199 init/main.c:441 start_kernel+0x5f0/0x62c init/main.c:736 x86_64_start_reservations+0x29/0x2b arch/x86/kernel/head64.c:490 x86_64_start_kernel+0x76/0x79 arch/x86/kernel/head64.c:471 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243 irq event stamp: 267490 hardirqs last enabled at (267487): [] default_idle+0x1c/0x310 arch/x86/kernel/process.c:557 hardirqs last disabled at (267488): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (267490): [] _local_bh_enable+0x1c/0x30 kernel/softirq.c:162 softirqs last disabled at (267489): [] irq_enter+0xa7/0xe0 kernel/softirq.c:358 ---[ end trace 862841cbf98db36f ]--- list_add double add: new=ffff8881d520d560, prev=ffff8881d520d560, next=ffff8881f6831550. ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:31! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 6976 Comm: syz-executor.2 Tainted: G W 4.19.198-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__list_add_valid+0xaa/0xb0 lib/list_debug.c:29 Code: e8 eb a9 48 89 f7 48 89 75 e8 e8 f1 da 9e fe 48 8b 75 e8 eb bb 48 89 f2 48 89 d9 4c 89 e6 48 c7 c7 20 65 1f 87 e8 b6 e1 80 03 <0f> 0b 0f 1f 40 00 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 41 55 RSP: 0018:ffff8881f6807c70 EFLAGS: 00010082 RAX: 0000000000000058 RBX: ffff8881f6831550 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff871f62e0 RDI: ffffffff89c866e0 RBP: ffff8881f6807c88 R08: ffffed103ed05079 R09: ffffed103ed05078 R10: ffffed103ed05078 R11: ffff8881f68283c7 R12: ffff8881d520d560 R13: ffff8881d520d560 R14: ffff8881d520d560 R15: ffff8881f6831558 FS: 0000000000000000(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055d49cc54140 CR3: 000000000806d002 CR4: 00000000001606f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000001100628 Call Trace: __list_add include/linux/list.h:60 [inline] list_add_tail include/linux/list.h:93 [inline] flexible_sched_in kernel/events/core.c:3336 [inline] flexible_sched_in+0x61e/0x920 kernel/events/core.c:3319 visit_groups_merge+0x251/0x5a0 kernel/events/core.c:3278 ctx_flexible_sched_in kernel/events/core.c:3367 [inline] ctx_sched_in+0x2bb/0x9c0 kernel/events/core.c:3412 cpu_ctx_sched_in kernel/events/core.c:3421 [inline] perf_event_sched_in+0x77/0x80 kernel/events/core.c:2431 ctx_resched+0x79/0xe0 kernel/events/core.c:2483 __perf_install_in_context+0x40d/0x880 kernel/events/core.c:2541 remote_function kernel/events/core.c:87 [inline] remote_function+0xff/0x180 kernel/events/core.c:67 flush_smp_call_function_queue+0x10e/0x3d0 kernel/smp.c:243 generic_smp_call_function_single_interrupt+0xe/0x20 kernel/smp.c:192 smp_call_function_single_interrupt+0xa0/0x440 arch/x86/kernel/smp.c:304 call_function_single_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:916 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline] RIP: 0010:lock_acquire+0x1f1/0x3d0 kernel/locking/lockdep.c:3911 Code: 00 00 00 00 00 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 aa 01 00 00 48 83 3d 43 68 c6 06 00 0f 84 31 01 00 00 48 8b 7d c8 57 9d <0f> 1f 44 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 65 8b RSP: 0018:ffff8881e07475d8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff04 RAX: dffffc0000000000 RBX: ffff8881d861c6c0 RCX: 1ffff1103b0c39f7 RDX: 1ffffffff1024021 RSI: 0000000000000000 RDI: 0000000000000286 RBP: ffff8881e0747620 R08: ffff8881d861cfb8 R09: 0000000000000002 R10: ffff8881d861cf98 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000002 R14: 0000000000000000 R15: 0000000000000000 rcu_lock_acquire include/linux/rcupdate.h:242 [inline] rcu_read_lock include/linux/rcupdate.h:627 [inline] lock_page_memcg+0x39/0x240 mm/memcontrol.c:1908 __set_page_dirty_buffers+0xeb/0x390 fs/buffer.c:637 ext4_set_page_dirty+0x17d/0x280 fs/ext4/inode.c:3943 set_page_dirty+0x1f3/0x520 mm/page-writeback.c:2569 zap_pte_range mm/memory.c:1343 [inline] zap_pmd_range mm/memory.c:1463 [inline] zap_pud_range mm/memory.c:1492 [inline] zap_p4d_range mm/memory.c:1513 [inline] unmap_page_range+0x13b1/0x2270 mm/memory.c:1534 unmap_single_vma+0x121/0x300 mm/memory.c:1579 unmap_vmas+0xe7/0x1a0 mm/memory.c:1609 exit_mmap+0x251/0x470 mm/mmap.c:3093 __mmput kernel/fork.c:1015 [inline] mmput+0x107/0x3f0 kernel/fork.c:1036 exit_mm kernel/exit.c:549 [inline] do_exit+0x9ce/0x2cf0 kernel/exit.c:857 do_group_exit+0xf4/0x2f0 kernel/exit.c:967 get_signal+0x316/0x19e0 kernel/signal.c:2589 do_signal+0x87/0x1960 arch/x86/kernel/signal.c:799 exit_to_usermode_loop+0x114/0x200 arch/x86/entry/common.c:163 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x413/0x4e0 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x460c99 Code: Bad RIP value. RSP: 002b:00007fbc2bdd41a8 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: 0000000000000005 RBX: 000000000052bf00 RCX: 0000000000460c99 RDX: 0000000000000000 RSI: ffffffffffffffff RDI: 0000000020000000 RBP: 0000000000000005 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000003 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004f43e0 R14: 00000000004b2242 R15: 00007fbc2bdd46bc Modules linked in: ---[ end trace 862841cbf98db370 ]--- RIP: 0010:__list_add_valid+0xaa/0xb0 lib/list_debug.c:29 Code: e8 eb a9 48 89 f7 48 89 75 e8 e8 f1 da 9e fe 48 8b 75 e8 eb bb 48 89 f2 48 89 d9 4c 89 e6 48 c7 c7 20 65 1f 87 e8 b6 e1 80 03 <0f> 0b 0f 1f 40 00 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 41 55 RSP: 0018:ffff8881f6807c70 EFLAGS: 00010082 RAX: 0000000000000058 RBX: ffff8881f6831550 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff871f62e0 RDI: ffffffff89c866e0 RBP: ffff8881f6807c88 R08: ffffed103ed05079 R09: ffffed103ed05078 R10: ffffed103ed05078 R11: ffff8881f68283c7 R12: ffff8881d520d560 R13: ffff8881d520d560 R14: ffff8881d520d560 R15: ffff8881f6831558 FS: 0000000000000000(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000460c6f CR3: 000000000806d002 CR4: 00000000001606f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000001100628