IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready BUG: unable to handle kernel NULL pointer dereference at 0000000000000000 PGD 22b40e067 P4D 22b40e067 PUD 22ce27067 PMD 0 Oops: 0000 [#1] SMP CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 4.19.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 RIP: 0010:taprio_dequeue+0x9b/0x1d0 net/sched/sch_taprio.c:146 Code: f6 0f 84 17 01 00 00 41 8b 85 c8 03 00 00 85 c0 0f 84 08 01 00 00 8b 45 d4 45 31 f6 48 89 45 c8 48 8b 8b 80 02 00 00 49 63 c6 <4c> 8b 3c c1 4d 85 ff 0f 84 d6 00 00 00 49 8b 47 18 4c 89 ff ff 50 RSP: 0018:ffffc90000c97d90 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff88022c4d6000 RCX: 0000000000000000 RDX: 0000000000000003 RSI: 0000000000000003 RDI: 0000000000000282 RBP: ffffc90000c97dc8 R08: 0000000000000002 R09: 00000000f9dd27d5 R10: 0000000000000000 R11: ffff8802346e4cb0 R12: ffff88022ec6b580 R13: ffff88022f89f000 R14: 0000000000000000 R15: ffff88022c4d6000 FS: 0000000000000000(0000) GS:ffff880237a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000022fae5000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: dequeue_skb net/sched/sch_generic.c:277 [inline] qdisc_restart net/sched/sch_generic.c:380 [inline] __qdisc_run+0x7d/0x540 net/sched/sch_generic.c:398 qdisc_run include/net/pkt_sched.h:121 [inline] net_tx_action+0x183/0x2d0 net/core/dev.c:4601 __do_softirq+0xef/0x2d0 kernel/softirq.c:292 run_ksoftirqd+0x3a/0x60 kernel/softirq.c:653 smpboot_thread_fn+0xc2/0x160 kernel/smpboot.c:164 kthread+0x119/0x130 kernel/kthread.c:246 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:413 Modules linked in: CR2: 0000000000000000 ---[ end trace 1106d906d2cf7a1f ]--- RIP: 0010:taprio_dequeue+0x9b/0x1d0 net/sched/sch_taprio.c:146 Code: f6 0f 84 17 01 00 00 41 8b 85 c8 03 00 00 85 c0 0f 84 08 01 00 00 8b 45 d4 45 31 f6 48 89 45 c8 48 8b 8b 80 02 00 00 49 63 c6 <4c> 8b 3c c1 4d 85 ff 0f 84 d6 00 00 00 49 8b 47 18 4c 89 ff ff 50 RSP: 0018:ffffc90000c97d90 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff88022c4d6000 RCX: 0000000000000000 RDX: 0000000000000003 RSI: 0000000000000003 RDI: 0000000000000282 RBP: ffffc90000c97dc8 R08: 0000000000000002 R09: 00000000f9dd27d5 R10: 0000000000000000 R11: ffff8802346e4cb0 R12: ffff88022ec6b580 R13: ffff88022f89f000 R14: 0000000000000000 R15: ffff88022c4d6000 FS: 0000000000000000(0000) GS:ffff880237a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000022fae5000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 0f 84 17 01 00 00 je 0x11d 6: 41 8b 85 c8 03 00 00 mov 0x3c8(%r13),%eax d: 85 c0 test %eax,%eax f: 0f 84 08 01 00 00 je 0x11d 15: 8b 45 d4 mov -0x2c(%rbp),%eax 18: 45 31 f6 xor %r14d,%r14d 1b: 48 89 45 c8 mov %rax,-0x38(%rbp) 1f: 48 8b 8b 80 02 00 00 mov 0x280(%rbx),%rcx 26: 49 63 c6 movslq %r14d,%rax * 29: 4c 8b 3c c1 mov (%rcx,%rax,8),%r15 <-- trapping instruction 2d: 4d 85 ff test %r15,%r15 30: 0f 84 d6 00 00 00 je 0x10c 36: 49 8b 47 18 mov 0x18(%r15),%rax 3a: 4c 89 ff mov %r15,%rdi 3d: ff .byte 0xff 3e: 50 push %rax