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: 8936 Comm: systemd-udevd Not tainted 5.15.0-rc1-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 58 52 8a be b1 02 00 00 48 c7 c2 80 58 52 8a e8 fe 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 9e 73 52 00 48 8b 2b 48 89 ee 48 RSP: 0000:ffffc90000dc0b30 EFLAGS: 00010206 RAX: 0000000000000182 RBX: 0000000000000c10 RCX: ffff888079781c80 RDX: 0000000000000102 RSI: 0000000000000004 RDI: ffff8880b9d32508 RBP: 0000000000000057 R08: dffffc0000000000 R09: ffffed10173a64a2 R10: ffffed10173a64a2 R11: 0000000000000000 R12: ffff88806162b000 R13: dffffc0000000000 R14: 0000000000000000 R15: dffffc0000000000 FS: 00007f6ca69518c0(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6ca5ca4230 CR3: 000000007af50000 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:__kasan_check_read+0x0/0x10 mm/kasan/shadow.c:31 Code: c7 d7 d1 1c 8c eb 0c 31 db 48 c7 c7 0f d2 1c 8c 4c 89 fe 31 c0 e8 a8 0e 9a ff eb d3 cc cc cc cc cc cc cc cc cc cc cc cc cc cc <89> f6 48 8b 0c 24 31 d2 e9 83 ee ff ff 0f 1f 00 89 f6 48 8b 0c 24 RSP: 0000:ffffc9000db3f918 EFLAGS: 00000282 RAX: 1ffffffff18710fb RBX: ffff8880b9d32508 RCX: ffff888079781c80 RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8880b9d32508 RBP: ffffc9000db3f9d0 R08: dffffc0000000000 R09: fffffbfff1bb7d4e R10: fffffbfff1bb7d4e R11: 0000000000000000 R12: dffffc0000000000 R13: 1ffff92001b67f4c R14: ffffffff8c3887d8 R15: dffffc0000000000 instrument_atomic_read include/linux/instrumented.h:71 [inline] atomic_read include/linux/atomic/atomic-instrumented.h:27 [inline] rcu_dynticks_curr_cpu_in_eqs kernel/rcu/tree.c:330 [inline] rcu_is_watching+0x58/0xb0 kernel/rcu/tree.c:1121 rcu_read_lock_held_common kernel/rcu/update.c:108 [inline] rcu_read_lock_sched_held+0x6b/0x130 kernel/rcu/update.c:123 trace_lock_release+0x4f/0x150 include/trace/events/lock.h:58 lock_release+0x82/0x810 kernel/locking/lockdep.c:5636 rcu_read_unlock include/linux/rcupdate.h:720 [inline] count_memcg_event_mm+0x342/0x390 include/linux/memcontrol.h:1064 handle_mm_fault+0x136/0x2560 mm/memory.c:4771 do_user_addr_fault+0x8ce/0x10c0 arch/x86/mm/fault.c:1390 handle_page_fault arch/x86/mm/fault.c:1475 [inline] exc_page_fault+0xa1/0x1e0 arch/x86/mm/fault.c:1531 asm_exc_page_fault+0x1e/0x30 RIP: 0033:0x7f6ca6743415 Code: 43 68 48 8b 40 08 48 89 44 24 28 48 8b 83 f8 02 00 00 48 85 c0 0f 84 e2 00 00 00 8b 4c 24 20 23 8b f0 02 00 00 48 8b 7c 24 18 <48> 8b 04 c8 8b 8b f4 02 00 00 48 89 fe 48 d3 ee 48 89 f1 48 89 c6 RSP: 002b:00007ffeede0a960 EFLAGS: 00010202 RAX: 00007f6ca5ca4220 RBX: 00007f6ca69593c0 RCX: 0000000000000002 RDX: 0000000000000062 RSI: 00007f6ca6959360 RDI: 00000000ff8760ae RBP: 0000000000000005 R08: 0000000000000000 R09: 0000000000000000 R10: 00007f6ca6754b00 R11: 00007f6ca62f42a0 R12: 000000000000000d R13: 0000000000000000 R14: 00007f6ca6957b58 R15: 0000000000000000 Modules linked in: ---[ end trace db935f6c4b798131 ]--- 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 fe 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 9e 73 52 00 48 8b 2b 48 89 ee 48 RSP: 0000:ffffc90000dc0b30 EFLAGS: 00010206 RAX: 0000000000000182 RBX: 0000000000000c10 RCX: ffff888079781c80 RDX: 0000000000000102 RSI: 0000000000000004 RDI: ffff8880b9d32508 RBP: 0000000000000057 R08: dffffc0000000000 R09: ffffed10173a64a2 R10: ffffed10173a64a2 R11: 0000000000000000 R12: ffff88806162b000 R13: dffffc0000000000 R14: 0000000000000000 R15: dffffc0000000000 FS: 00007f6ca69518c0(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6ca5ca4230 CR3: 000000007af50000 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 fe 18 e9 ff callq 0xffe91916 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 9e 73 52 00 callq 0x5273d6 38: 48 8b 2b mov (%rbx),%rbp 3b: 48 89 ee mov %rbp,%rsi 3e: 48 rex.W