Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 0 UID: 0 PID: 7861 Comm: syz.4.211 Not tainted 6.14.0-rc5-syzkaller-00013-g99fa936e8e4f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:dst_dev_put+0x27/0x290 net/core/dst.c:146 Code: 90 90 90 f3 0f 1e fa 55 41 57 41 56 41 55 41 54 53 49 89 fd 49 bf 00 00 00 00 00 fc ff df e8 d0 f7 fa f7 4d 89 ec 49 c1 ec 03 <43> 80 3c 3c 00 74 08 4c 89 ef e8 fa ab 5f f8 4d 8b 75 00 49 8d 7d RSP: 0018:ffffc90000007b38 EFLAGS: 00010246 RAX: ffffffff89c6c6f0 RBX: 0000000000000001 RCX: ffff888035adbc00 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000001 RBP: 1ffffffff1ca784a R08: ffffffff8a6fb0b9 R09: 1ffff1100553e4c0 R10: dffffc0000000000 R11: ffffed100553e4c1 R12: 0000000000000000 R13: 0000000000000001 R14: 00000000fffffff8 R15: dffffc0000000000 FS: 00007f6bbb1d56c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6fb79b6000 CR3: 000000002ab58000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rt_fibinfo_free_cpus net/ipv4/fib_semantics.c:201 [inline] fib_nh_common_release+0x1fc/0x420 net/ipv4/fib_semantics.c:212 fib6_info_destroy_rcu+0xc0/0x1b0 net/ipv6/ip6_fib.c:177 rcu_do_batch kernel/rcu/tree.c:2546 [inline] rcu_core+0xaaa/0x17a0 kernel/rcu/tree.c:2802 handle_softirqs+0x2d4/0x9b0 kernel/softirq.c:561 __do_softirq kernel/softirq.c:595 [inline] invoke_softirq kernel/softirq.c:435 [inline] __irq_exit_rcu+0xf7/0x220 kernel/softirq.c:662 irq_exit_rcu+0x9/0x30 kernel/softirq.c:678 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:valid_section include/linux/mmzone.h:1969 [inline] RIP: 0010:pfn_valid+0x15c/0x450 include/linux/mmzone.h:2068 Code: 74 7d e8 d7 5f 8f ff 4d 85 ff 75 11 e8 cd 5f 8f ff eb 3d e8 c6 5f 8f ff 4d 85 ff 74 ef 4c 89 fd 48 c1 ed 03 42 80 7c 25 00 00 <74> 08 4c 89 ff e8 ea 13 f4 ff 49 8b 1f 48 89 de 48 83 e6 02 31 ff RSP: 0018:ffffc900036572c8 EFLAGS: 00000246 RAX: ffffffff82325ee9 RBX: 0000000000000040 RCX: ffff888035adbc00 RDX: 0000000000000000 RSI: ffffffff8c801c00 RDI: ffffffff8c801bc0 RBP: 1ffff11027fff5a0 R08: ffffffff82325ed7 R09: 1ffffffff28a2908 R10: dffffc0000000000 R11: fffffbfff28a2909 R12: dffffc0000000000 R13: 00000000000133f8 R14: ffffffff82325ea6 R15: ffff88813fffad00 page_table_check_clear+0x1e/0x550 mm/page_table_check.c:70 zap_present_ptes mm/memory.c:1567 [inline] do_zap_pte_range mm/memory.c:1698 [inline] zap_pte_range mm/memory.c:1742 [inline] zap_pmd_range mm/memory.c:1834 [inline] zap_pud_range mm/memory.c:1863 [inline] zap_p4d_range mm/memory.c:1884 [inline] unmap_page_range+0x33bf/0x4510 mm/memory.c:1905 unmap_vmas+0x3cc/0x5f0 mm/memory.c:1995 vms_clear_ptes+0x35c/0x530 mm/vma.c:1137 vms_complete_munmap_vmas+0x210/0x8f0 mm/vma.c:1186 do_vmi_align_munmap+0x5ef/0x6f0 mm/vma.c:1445 do_vmi_munmap+0x24e/0x2d0 mm/vma.c:1493 __vm_munmap+0x372/0x510 mm/vma.c:2951 __do_sys_munmap mm/mmap.c:1084 [inline] __se_sys_munmap mm/mmap.c:1081 [inline] __x64_sys_munmap+0x60/0x70 mm/mmap.c:1081 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f6bbd38d1f7 Code: 00 00 00 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 48 c7 c0 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 0b 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f6bbb1d4e18 EFLAGS: 00000246 ORIG_RAX: 000000000000000b RAX: ffffffffffffffda RBX: 0000000001000000 RCX: 00007f6bbd38d1f7 RDX: 0000000000000000 RSI: 0000000008400000 RDI: 00007f6bb2c00000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000009600 R10: 0000400000012cc2 R11: 0000000000000246 R12: 0000000000000003 R13: 00007f6bbb1d4ef0 R14: 00007f6bbb1d4eb0 R15: 00007f6bb2c00000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:dst_dev_put+0x27/0x290 net/core/dst.c:146 Code: 90 90 90 f3 0f 1e fa 55 41 57 41 56 41 55 41 54 53 49 89 fd 49 bf 00 00 00 00 00 fc ff df e8 d0 f7 fa f7 4d 89 ec 49 c1 ec 03 <43> 80 3c 3c 00 74 08 4c 89 ef e8 fa ab 5f f8 4d 8b 75 00 49 8d 7d RSP: 0018:ffffc90000007b38 EFLAGS: 00010246 RAX: ffffffff89c6c6f0 RBX: 0000000000000001 RCX: ffff888035adbc00 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000001 RBP: 1ffffffff1ca784a R08: ffffffff8a6fb0b9 R09: 1ffff1100553e4c0 R10: dffffc0000000000 R11: ffffed100553e4c1 R12: 0000000000000000 R13: 0000000000000001 R14: 00000000fffffff8 R15: dffffc0000000000 FS: 00007f6bbb1d56c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6fb79b6000 CR3: 000000002ab58000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 90 nop 1: 90 nop 2: 90 nop 3: f3 0f 1e fa endbr64 7: 55 push %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 fd mov %rdi,%r13 14: 49 bf 00 00 00 00 00 movabs $0xdffffc0000000000,%r15 1b: fc ff df 1e: e8 d0 f7 fa f7 call 0xf7faf7f3 23: 4d 89 ec mov %r13,%r12 26: 49 c1 ec 03 shr $0x3,%r12 * 2a: 43 80 3c 3c 00 cmpb $0x0,(%r12,%r15,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 4c 89 ef mov %r13,%rdi 34: e8 fa ab 5f f8 call 0xf85fac33 39: 4d 8b 75 00 mov 0x0(%r13),%r14 3d: 49 rex.WB 3e: 8d .byte 0x8d 3f: 7d .byte 0x7d