BUG: unable to handle page fault for address: ffff8880976e3000 #PF: supervisor write access in kernel mode #PF: error_code(0x0002) - not-present page PGD 1b401067 P4D 1b401067 PUD 0 Oops: Oops: 0002 [#1] SMP KASAN NOPTI CPU: 3 UID: 0 PID: 19306 Comm: syz.5.3417 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:bond_rr_gen_slave_id+0x92/0x250 drivers/net/bonding/bond_main.c:4845 Code: 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 bd 01 00 00 49 8b 84 24 f0 00 00 00 bb 01 00 00 00 <65> 0f c1 18 e8 45 a7 85 fb 83 c3 01 89 d8 5b 5d 41 5c 41 5d 41 5e RSP: 0018:ffffc9000331f598 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffc9002b7c6000 RDX: 1ffff1100eafe1ce RSI: ffffffff8680a342 RDI: ffff8880757f0e70 RBP: ffff88804a0ac170 R08: 0000000000000005 R09: 0000000000000001 R10: 0000000000000001 R11: 0000000000000000 R12: ffff8880757f0d80 R13: 0000000000008f00 R14: ffff8880757f0d80 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880976e3000(0063) knlGS:00000000f53a5b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: ffff8880976e3000 CR3: 000000004ddd4000 CR4: 0000000000352ef0 DR0: 0000000000000003 DR1: 00000000000001f8 DR2: 000000000000008e DR3: 000000000000057a DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: bond_xdp_xmit_roundrobin_slave_get drivers/net/bonding/bond_main.c:4932 [inline] bond_xdp_get_xmit_slave+0x296/0x660 drivers/net/bonding/bond_main.c:5515 xdp_master_redirect+0x161/0x330 net/core/filter.c:4390 bpf_prog_run_xdp include/net/xdp.h:700 [inline] xdp_test_run_batch.constprop.0+0xc60/0x1ca0 net/bpf/test_run.c:307 bpf_test_run_xdp_live+0x367/0x760 net/bpf/test_run.c:379 bpf_prog_test_run_xdp+0xd7d/0x1670 net/bpf/test_run.c:1396 bpf_prog_test_run kernel/bpf/syscall.c:4703 [inline] __sys_bpf+0x1e56/0x5050 kernel/bpf/syscall.c:6182 __do_sys_bpf kernel/bpf/syscall.c:6274 [inline] __se_sys_bpf kernel/bpf/syscall.c:6272 [inline] __ia32_sys_bpf+0x79/0xf0 kernel/bpf/syscall.c:6272 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline] __do_fast_syscall_32+0xde/0x660 arch/x86/entry/syscall_32.c:307 do_fast_syscall_32+0x32/0x70 arch/x86/entry/syscall_32.c:332 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf7f07579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 2e 8d b4 26 00 00 00 00 8d b4 26 00 00 00 RSP: 002b:00000000f53a550c EFLAGS: 00000292 ORIG_RAX: 0000000000000165 RAX: ffffffffffffffda RBX: 000000000000000a RCX: 0000000080000600 RDX: 0000000000000050 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: CR2: ffff8880976e3000 ---[ end trace 0000000000000000 ]--- RIP: 0010:bond_rr_gen_slave_id+0x92/0x250 drivers/net/bonding/bond_main.c:4845 Code: 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 bd 01 00 00 49 8b 84 24 f0 00 00 00 bb 01 00 00 00 <65> 0f c1 18 e8 45 a7 85 fb 83 c3 01 89 d8 5b 5d 41 5c 41 5d 41 5e RSP: 0018:ffffc9000331f598 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffc9002b7c6000 RDX: 1ffff1100eafe1ce RSI: ffffffff8680a342 RDI: ffff8880757f0e70 RBP: ffff88804a0ac170 R08: 0000000000000005 R09: 0000000000000001 R10: 0000000000000001 R11: 0000000000000000 R12: ffff8880757f0d80 R13: 0000000000008f00 R14: ffff8880757f0d80 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880976e3000(0063) knlGS:00000000f53a5b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: ffff8880976e3000 CR3: 000000004ddd4000 CR4: 0000000000352ef0 DR0: 0000000000000003 DR1: 00000000000001f8 DR2: 000000000000008e DR3: 000000000000057a DR6: 00000000ffff0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 9: fc ff df c: 48 89 fa mov %rdi,%rdx f: 48 c1 ea 03 shr $0x3,%rdx 13: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) 17: 0f 85 bd 01 00 00 jne 0x1da 1d: 49 8b 84 24 f0 00 00 mov 0xf0(%r12),%rax 24: 00 25: bb 01 00 00 00 mov $0x1,%ebx * 2a: 65 0f c1 18 xadd %ebx,%gs:(%rax) <-- trapping instruction 2e: e8 45 a7 85 fb call 0xfb85a778 33: 83 c3 01 add $0x1,%ebx 36: 89 d8 mov %ebx,%eax 38: 5b pop %rbx 39: 5d pop %rbp 3a: 41 5c pop %r12 3c: 41 5d pop %r13 3e: 41 5e pop %r14