general protection fault, probably for non-canonical address 0xdffffc0000000182: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000c10-0x0000000000000c17] CPU: 0 PID: 2971 Comm: systemd-udevd Not tainted 5.15.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__ref_is_percpu include/linux/percpu-refcount.h:174 [inline] RIP: 0010:percpu_ref_put_many include/linux/percpu-refcount.h:319 [inline] RIP: 0010:percpu_ref_put+0x93/0x1d0 include/linux/percpu-refcount.h:338 Code: 01 48 c7 c7 40 59 52 8a be b1 02 00 00 48 c7 c2 80 59 52 8a e8 de 18 e9 ff 49 bd 00 00 00 00 00 fc ff df 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 1e 75 52 00 48 8b 2b 48 89 ee 48 RSP: 0018:ffffc90000007b30 EFLAGS: 00010206 RAX: 0000000000000182 RBX: 0000000000000c10 RCX: ffff88807bbdd580 RDX: 0000000080000100 RSI: 0000000000000004 RDI: ffff8880b9c32508 RBP: 00000000000000a5 R08: dffffc0000000000 R09: ffffed10173864a2 R10: ffffed10173864a2 R11: 0000000000000000 R12: ffff88808ec5f000 R13: dffffc0000000000 R14: 0000000000000000 R15: dffffc0000000000 FS: 00007f127fe3d8c0(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f03ca9f5018 CR3: 0000000014dd9000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: cgroup_bpf_put include/linux/cgroup.h:926 [inline] cgroup_sk_free+0x3c/0xa0 kernel/cgroup/cgroup.c:6613 sk_prot_free net/core/sock.c:1852 [inline] __sk_destruct+0x541/0x820 net/core/sock.c:1943 call_timer_fn+0xf6/0x210 kernel/time/timer.c:1421 expire_timers kernel/time/timer.c:1466 [inline] __run_timers+0x71a/0x910 kernel/time/timer.c:1734 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1747 __do_softirq+0x392/0x7a3 kernel/softirq.c:558 __irq_exit_rcu+0xec/0x170 kernel/softirq.c:636 irq_exit_rcu+0x5/0x20 kernel/softirq.c:648 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1097 asm_sysvec_apic_timer_interrupt+0x12/0x20 RIP: 0010:call_rcu+0x7c3/0xa80 kernel/rcu/tree.c:3068 Code: 3c 03 00 74 08 4c 89 f7 e8 ca 9e 60 00 f6 84 24 81 00 00 00 02 75 59 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 60 0e 36 e0 45 <48> b8 00 00 00 00 00 fc ff df 4a c7 04 28 00 00 00 00 66 42 c7 44 RSP: 0018:ffffc9000296fd60 EFLAGS: 00000206 RAX: dffffc0000000000 RBX: 1ffff9200052dfbc RCX: ffffffff90930803 RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc9000296fe80 R08: ffffffff8188f290 R09: fffffbfff1bb7e6e R10: fffffbfff1bb7e6e R11: 0000000000000000 R12: 1ffff11017386494 R13: 1ffff9200052dfb8 R14: ffffc9000296fde0 R15: 0000000000000246 task_work_run+0x146/0x1c0 kernel/task_work.c:164 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop kernel/entry/common.c:175 [inline] exit_to_user_mode_prepare+0x209/0x220 kernel/entry/common.c:207 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline] syscall_exit_to_user_mode+0x2e/0x70 kernel/entry/common.c:300 do_syscall_64+0x53/0xd0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f127ec45a4b Code: 48 8b 34 24 eb c5 66 0f 1f 84 00 00 00 00 00 48 c7 c0 ff ff ff ff eb c8 0f 1f 80 00 00 00 00 48 63 7f 70 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 05 f3 c3 0f 1f 00 48 8b 15 19 74 32 00 f7 d8 RSP: 002b:00007ffd635efa28 EFLAGS: 00000206 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000557ba24e8200 RCX: 00007f127ec45a4b RDX: 00007f127ef69900 RSI: 0000000000000001 RDI: 000000000000000e RBP: 00007f127ef6a440 R08: 00007f127fe3d8c0 R09: 0000557ba24e8200 R10: 00007f127fe3d8c0 R11: 0000000000000206 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000001000 R15: 00007ffd635efc00 Modules linked in: ---[ end trace 118b9e203d0b4cf0 ]--- RIP: 0010:__ref_is_percpu include/linux/percpu-refcount.h:174 [inline] RIP: 0010:percpu_ref_put_many include/linux/percpu-refcount.h:319 [inline] RIP: 0010:percpu_ref_put+0x93/0x1d0 include/linux/percpu-refcount.h:338 Code: 01 48 c7 c7 40 59 52 8a be b1 02 00 00 48 c7 c2 80 59 52 8a e8 de 18 e9 ff 49 bd 00 00 00 00 00 fc ff df 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 1e 75 52 00 48 8b 2b 48 89 ee 48 RSP: 0018:ffffc90000007b30 EFLAGS: 00010206 RAX: 0000000000000182 RBX: 0000000000000c10 RCX: ffff88807bbdd580 RDX: 0000000080000100 RSI: 0000000000000004 RDI: ffff8880b9c32508 RBP: 00000000000000a5 R08: dffffc0000000000 R09: ffffed10173864a2 R10: ffffed10173864a2 R11: 0000000000000000 R12: ffff88808ec5f000 R13: dffffc0000000000 R14: 0000000000000000 R15: dffffc0000000000 FS: 00007f127fe3d8c0(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f03ca9f5018 CR3: 0000000014dd9000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 48 c7 c7 40 59 52 8a mov $0xffffffff8a525940,%rdi 7: be b1 02 00 00 mov $0x2b1,%esi c: 48 c7 c2 80 59 52 8a mov $0xffffffff8a525980,%rdx 13: e8 de 18 e9 ff callq 0xffe918f6 18: 49 bd 00 00 00 00 00 movabs $0xdffffc0000000000,%r13 1f: fc ff df 22: 48 89 d8 mov %rbx,%rax 25: 48 c1 e8 03 shr $0x3,%rax * 29: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) <-- trapping instruction 2e: 74 08 je 0x38 30: 48 89 df mov %rbx,%rdi 33: e8 1e 75 52 00 callq 0x527556 38: 48 8b 2b mov (%rbx),%rbp 3b: 48 89 ee mov %rbp,%rsi 3e: 48 rex.W