general protection fault, probably for non-canonical address 0xdffffc0000000182: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000c10-0x0000000000000c17] CPU: 1 PID: 15642 Comm: kworker/1:12 Not tainted 5.15.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: usb_hub_wq hub_event 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 58 52 8a be b1 02 00 00 48 c7 c2 80 58 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:ffffc90000dc0b30 EFLAGS: 00010206 RAX: 0000000000000182 RBX: 0000000000000c10 RCX: ffff88807cf93900 RDX: 0000000000000101 RSI: 0000000000000004 RDI: ffff8880b9d32508 RBP: 000000000000003b R08: dffffc0000000000 R09: ffffed10173a64a2 R10: ffffed10173a64a2 R11: 0000000000000000 R12: ffff88802ae87000 R13: dffffc0000000000 R14: 0000000000000000 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055b30ff5a160 CR3: 00000000aa7b0000 CR4: 00000000001506e0 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:console_unlock+0xc88/0xe90 kernel/printk/printk.c:2715 Code: 00 e9 71 fa ff ff e8 47 58 1a 00 e8 f2 b8 90 08 48 83 7c 24 38 00 74 dd 66 2e 0f 1f 84 00 00 00 00 00 e8 2b 58 1a 00 fb 31 ff <44> 89 f6 e8 30 5c 1a 00 31 db 45 85 f6 0f 95 c0 89 c1 0a 4c 24 0f RSP: 0018:ffffc9000b167020 EFLAGS: 00000246 RAX: ffffffff81681db5 RBX: 0000000000000000 RCX: 0000000000040000 RDX: ffffc900164a9000 RSI: 0000000000002327 RDI: 0000000000000000 RBP: ffffc9000b167230 R08: ffffffff81681d6c R09: fffffbfff1fa31c1 R10: fffffbfff1fa31c1 R11: 0000000000000000 R12: ffffffff8d1cc4e8 R13: ffffffff8d1cc4b0 R14: 0000000000000000 R15: ffffc9000b1670a0 vprintk_emit+0xba/0x140 kernel/printk/printk.c:2244 dev_vprintk_emit+0x2e4/0x35d drivers/base/core.c:4559 dev_printk_emit+0xd9/0x118 drivers/base/core.c:4570 _dev_info+0x11e/0x165 drivers/base/core.c:4628 usb_disconnect+0xde/0x8a0 drivers/usb/core/hub.c:2207 hub_port_connect+0x297/0x27d0 drivers/usb/core/hub.c:5199 hub_port_connect_change+0x5f9/0xc20 drivers/usb/core/hub.c:5488 port_event+0xb67/0x1220 drivers/usb/core/hub.c:5634 hub_event+0x4ed/0xe40 drivers/usb/core/hub.c:5716 process_one_work+0x853/0x1140 kernel/workqueue.c:2297 process_scheduled_works kernel/workqueue.c:2360 [inline] worker_thread+0xe28/0x1320 kernel/workqueue.c:2446 kthread+0x453/0x480 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 Modules linked in: ---[ end trace d13754a108e488cc ]--- 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 58 52 8a be b1 02 00 00 48 c7 c2 80 58 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:ffffc90000dc0b30 EFLAGS: 00010206 RAX: 0000000000000182 RBX: 0000000000000c10 RCX: ffff88807cf93900 RDX: 0000000000000101 RSI: 0000000000000004 RDI: ffff8880b9d32508 RBP: 000000000000003b R08: dffffc0000000000 R09: ffffed10173a64a2 R10: ffffed10173a64a2 R11: 0000000000000000 R12: ffff88802ae87000 R13: dffffc0000000000 R14: 0000000000000000 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055b30ff5a160 CR3: 00000000aa7b0000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 48 c7 c7 40 58 52 8a mov $0xffffffff8a525840,%rdi 7: be b1 02 00 00 mov $0x2b1,%esi c: 48 c7 c2 80 58 52 8a mov $0xffffffff8a525880,%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