general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 1 PID: 160 Comm: udevd Not tainted 5.10.117-syzkaller-986967-g0974b8411a58-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:dst_dev_put+0x26/0x1c0 net/core/dst.c:156 Code: 00 00 00 00 55 48 89 e5 41 57 41 56 41 55 41 54 53 49 89 ff 49 bc 00 00 00 00 00 fc ff df e8 61 2d a6 fd 4d 89 fd 49 c1 ed 03 <43> 80 7c 25 00 00 74 08 4c 89 ff e8 7a 00 e0 fd 4d 8b 37 49 8d 7f RSP: 0018:ffffc90000160b78 EFLAGS: 00010246 RAX: ffffffff83c684ef RBX: 0000000000000001 RCX: ffff88810ca7bb40 RDX: 0000000000000100 RSI: 0000000000000001 RDI: 0000000000000001 RBP: ffffc90000160ba0 R08: ffffffff840df71d R09: ffffed102194f769 R10: ffffed102194f769 R11: 1ffff1102194f768 R12: dffffc0000000000 R13: 0000000000000000 R14: 0000607e08a3d548 R15: 0000000000000001 FS: 00007f52a6fee840(0000) GS:ffff8881f7300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2db20000 CR3: 000000010c92d000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rt_fibinfo_free_cpus+0xee/0x1c0 net/ipv4/fib_semantics.c:203 fib_nh_common_release+0x8d/0x240 net/ipv4/fib_semantics.c:216 fib_nh_release net/ipv4/fib_semantics.c:228 [inline] free_fib_info_rcu+0x98/0x190 net/ipv4/fib_semantics.c:240 rcu_do_batch+0x59e/0xc40 kernel/rcu/tree.c:2485 rcu_core+0x59b/0xe30 kernel/rcu/tree.c:2726 rcu_core_si+0x9/0x10 kernel/rcu/tree.c:2739 __do_softirq+0x27e/0x596 kernel/softirq.c:305 asm_call_irq_on_stack+0xf/0x20 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline] do_softirq_own_stack+0x60/0x80 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:402 [inline] __irq_exit_rcu+0x128/0x150 kernel/softirq.c:432 irq_exit_rcu+0x9/0x10 kernel/softirq.c:444 sysvec_apic_timer_interrupt+0xbf/0xe0 arch/x86/kernel/apic/apic.c:1095 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 RIP: 0010:preempt_count_add+0x12/0x1a0 kernel/sched/core.c:4440 Code: 80 c9 ee 85 48 89 de e8 ac 58 20 01 e9 1e ff ff ff 0f 1f 80 00 00 00 00 55 48 89 e5 41 57 41 56 53 89 fb 48 c7 c0 80 58 83 86 <48> c1 e8 03 49 bf 00 00 00 00 00 fc ff df 42 8a 04 38 84 c0 0f 85 RSP: 0018:ffffc90000bb78f0 EFLAGS: 00000202 RAX: ffffffff86835880 RBX: 0000000000000001 RCX: dffffc0000000000 RDX: dffffc0000000000 RSI: ffffffff8543d980 RDI: 0000000000000001 RBP: ffffc90000bb7908 R08: ffffc90000bb7a88 R09: 0000000000000009 R10: ffffc90000bb7a90 R11: 1ffff92000176f34 R12: ffff88810ca7bb40 R13: ffffffff815b4ee0 R14: 0000000000000000 R15: 1ffff92000176f3d is_module_text_address+0x1a/0x140 kernel/module.c:4734 kernel_text_address kernel/extable.c:145 [inline] __kernel_text_address+0x88/0x110 kernel/extable.c:105 unwind_get_return_address+0x4c/0x90 arch/x86/kernel/unwind_frame.c:19 arch_stack_walk+0xf8/0x140 arch/x86/kernel/stacktrace.c:26 stack_trace_save+0x12d/0x1f0 kernel/stacktrace.c:121 kasan_save_stack+0x36/0x60 mm/kasan/common.c:38 kasan_record_aux_stack+0xca/0xf0 mm/kasan/generic.c:345 task_work_add+0xa7/0x320 kernel/task_work.c:39 fput_many+0xe9/0x1a0 fs/file_table.c:342 fput+0x1a/0x20 fs/file_table.c:358 filp_close+0x105/0x150 fs/open.c:1325 __close_fd+0x224/0x290 fs/file.c:700 __do_sys_close fs/open.c:1338 [inline] __se_sys_close fs/open.c:1336 [inline] __x64_sys_close+0x69/0xc0 fs/open.c:1336 do_syscall_64+0x34/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f52a714a467 Code: 44 00 00 48 8b 15 11 aa 0c 00 f7 d8 64 89 02 b8 ff ff ff ff eb bc 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 8b 15 e1 a9 0c 00 f7 d8 64 89 02 b8 RSP: 002b:00007ffcc37d1f18 EFLAGS: 00000202 ORIG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: 00005632104d63c0 RCX: 00007f52a714a467 RDX: 00007f52a7215a60 RSI: 0000000000000000 RDI: 000000000000000d RBP: 000056321051dae0 R08: 0000000000000000 R09: 00007f52a7215a60 R10: 0000000001000000 R11: 0000000000000202 R12: 00005632104ccbc0 R13: 00000000000000ff R14: 00007ffcc37d1f20 R15: 0000000000000000 Modules linked in: ---[ end trace 89a77c24d03a496b ]--- RIP: 0010:dst_dev_put+0x26/0x1c0 net/core/dst.c:156 Code: 00 00 00 00 55 48 89 e5 41 57 41 56 41 55 41 54 53 49 89 ff 49 bc 00 00 00 00 00 fc ff df e8 61 2d a6 fd 4d 89 fd 49 c1 ed 03 <43> 80 7c 25 00 00 74 08 4c 89 ff e8 7a 00 e0 fd 4d 8b 37 49 8d 7f RSP: 0018:ffffc90000160b78 EFLAGS: 00010246 RAX: ffffffff83c684ef RBX: 0000000000000001 RCX: ffff88810ca7bb40 RDX: 0000000000000100 RSI: 0000000000000001 RDI: 0000000000000001 RBP: ffffc90000160ba0 R08: ffffffff840df71d R09: ffffed102194f769 R10: ffffed102194f769 R11: 1ffff1102194f768 R12: dffffc0000000000 R13: 0000000000000000 R14: 0000607e08a3d548 R15: 0000000000000001 FS: 00007f52a6fee840(0000) GS:ffff8881f7300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2db20000 CR3: 000000010c92d000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 00 00 add %al,(%rax) 4: 55 push %rbp 5: 48 89 e5 mov %rsp,%rbp 8: 41 57 push %r15 a: 41 56 push %r14 c: 41 55 push %r13 e: 41 54 push %r12 10: 53 push %rbx 11: 49 89 ff mov %rdi,%r15 14: 49 bc 00 00 00 00 00 movabs $0xdffffc0000000000,%r12 1b: fc ff df 1e: e8 61 2d a6 fd callq 0xfda62d84 23: 4d 89 fd mov %r15,%r13 26: 49 c1 ed 03 shr $0x3,%r13 * 2a: 43 80 7c 25 00 00 cmpb $0x0,0x0(%r13,%r12,1) <-- trapping instruction 30: 74 08 je 0x3a 32: 4c 89 ff mov %r15,%rdi 35: e8 7a 00 e0 fd callq 0xfde000b4 3a: 4d 8b 37 mov (%r15),%r14 3d: 49 rex.WB 3e: 8d .byte 0x8d 3f: 7f .byte 0x7f