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: 11250 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: ffff888087de3900 RDX: 0000000000000100 RSI: 0000000000000004 RDI: ffff8880b9c32508 RBP: 0000000000000043 R08: dffffc0000000000 R09: ffffed10173864a2 R10: ffffed10173864a2 R11: 0000000000000000 R12: ffff888072c79000 R13: dffffc0000000000 R14: 0000000000000000 R15: dffffc0000000000 FS: 00007f1ab18bd8c0(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005631cddf0517 CR3: 0000000079a60000 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:bytes_is_nonzero mm/kasan/generic.c:85 [inline] RIP: 0010:memory_is_nonzero mm/kasan/generic.c:102 [inline] RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:128 [inline] RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline] RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline] RIP: 0010:kasan_check_range+0x84/0x2f0 mm/kasan/generic.c:189 Code: df 4d 01 ea 4d 89 d6 4d 29 ce 49 83 fe 10 7f 30 4d 85 f6 0f 84 ae 01 00 00 4c 89 cb 4c 29 d3 0f 1f 80 00 00 00 00 45 0f b6 19 <45> 84 db 0f 85 f3 01 00 00 49 ff c1 48 ff c3 75 eb e9 87 01 00 00 RSP: 0018:ffffc90003207690 EFLAGS: 00000297 RAX: 0000000000000001 RBX: ffffffffffffffff RCX: ffffffff81643601 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8ddbf428 RBP: ffffc90003207808 R08: dffffc0000000000 R09: fffffbfff1bb7e85 R10: fffffbfff1bb7e86 R11: 0000000000000000 R12: 1ffffffff1bb7e85 R13: dffffc0000000001 R14: 0000000000000001 R15: 0000000000000000 instrument_atomic_read include/linux/instrumented.h:71 [inline] test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline] cpumask_test_cpu include/linux/cpumask.h:344 [inline] cpu_online include/linux/cpumask.h:895 [inline] trace_lock_release+0x31/0x150 include/trace/events/lock.h:58 lock_release+0x82/0x810 kernel/locking/lockdep.c:5636 rcu_read_unlock include/linux/rcupdate.h:720 [inline] is_bpf_text_address+0x253/0x270 kernel/bpf/core.c:708 kernel_text_address kernel/extable.c:151 [inline] __kernel_text_address+0x93/0x100 kernel/extable.c:105 unwind_get_return_address+0x48/0x80 arch/x86/kernel/unwind_orc.c:318 arch_stack_walk+0xf8/0x140 arch/x86/kernel/stacktrace.c:26 stack_trace_save+0x11b/0x1e0 kernel/stacktrace.c:121 kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4c/0x80 mm/kasan/common.c:46 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360 ____kasan_slab_free+0x10d/0x150 mm/kasan/common.c:366 kasan_slab_free include/linux/kasan.h:230 [inline] slab_free_hook mm/slub.c:1700 [inline] slab_free_freelist_hook+0x129/0x1a0 mm/slub.c:1725 slab_free mm/slub.c:3483 [inline] kmem_cache_free+0x85/0x180 mm/slub.c:3499 putname fs/namei.c:270 [inline] user_path_at_empty+0x149/0x1a0 fs/namei.c:2803 user_path_at include/linux/namei.h:57 [inline] do_utimes_path fs/utimes.c:94 [inline] do_utimes+0x116/0x260 fs/utimes.c:144 __do_sys_utimensat fs/utimes.c:163 [inline] __se_sys_utimensat fs/utimes.c:147 [inline] __x64_sys_utimensat+0x150/0x250 fs/utimes.c:147 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f1ab0733c42 Code: 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 85 f6 74 2d 48 63 ff 4c 63 d1 b8 18 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 06 f3 c3 0f 1f 40 00 48 8b 15 21 92 2b 00 f7 RSP: 002b:00007fffbc232c68 EFLAGS: 00000206 ORIG_RAX: 0000000000000118 RAX: ffffffffffffffda RBX: 00007fffbc233700 RCX: 00007f1ab0733c42 RDX: 0000000000000000 RSI: 00007fffbc233700 RDI: ffffffffffffff9c RBP: 0000000000000000 R08: 0000000000000000 R09: 000000000000000e R10: 0000000000000100 R11: 0000000000000206 R12: 00007fffbc232d20 R13: 00005631cdd471a0 R14: 00007fffbc233120 R15: 00007fffbc23370f Modules linked in: ---[ end trace fb57cf4e8a114921 ]--- 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: ffff888087de3900 RDX: 0000000000000100 RSI: 0000000000000004 RDI: ffff8880b9c32508 RBP: 0000000000000043 R08: dffffc0000000000 R09: ffffed10173864a2 R10: ffffed10173864a2 R11: 0000000000000000 R12: ffff888072c79000 R13: dffffc0000000000 R14: 0000000000000000 R15: dffffc0000000000 FS: 00007f1ab18bd8c0(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005631cddf0517 CR3: 0000000079a60000 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