netlink: 12 bytes leftover after parsing attributes in process `syz-executor.3'. audit: type=1800 audit(1642699387.989:3): pid=9795 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.4" name="file0" dev="sda1" ino=13838 res=0 netlink: 24 bytes leftover after parsing attributes in process `syz-executor.2'. kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 9802 Comm: syz-executor.3 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:dequeue_head net/sched/sch_fq_codel.c:126 [inline] RIP: 0010:fq_codel_drop net/sched/sch_fq_codel.c:174 [inline] RIP: 0010:fq_codel_enqueue+0x8ad/0x1100 net/sched/sch_fq_codel.c:236 Code: 59 8e ca fa 45 39 ec 0f 83 cb 00 00 00 e8 5b 8d ca fa 48 8b 44 24 10 80 38 00 0f 85 69 06 00 00 49 8b 07 48 89 c2 48 c1 ea 03 <42> 80 3c 32 00 0f 85 3d 06 00 00 48 8b 10 48 8d 78 28 49 89 17 48 RSP: 0018:ffff8880508cf6d0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc90008044000 RDX: 0000000000000000 RSI: ffffffff8697f815 RDI: 0000000000000004 RBP: ffff8880508cf890 R08: ffffffff8c665058 R09: 0000000000000400 R10: 0000000000000004 R11: ffffffff8c66505b R12: 0000000000000400 R13: 0000000000000000 R14: dffffc0000000000 R15: ffff888052d20b80 FS: 00007f2ac09e1700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fff3fcb9507 CR3: 00000000aa410000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __dev_xmit_skb net/core/dev.c:3494 [inline] __dev_queue_xmit+0x140a/0x2e00 net/core/dev.c:3807 __netlink_deliver_tap_skb net/netlink/af_netlink.c:303 [inline] __netlink_deliver_tap net/netlink/af_netlink.c:321 [inline] netlink_deliver_tap+0x8fb/0xb00 net/netlink/af_netlink.c:334 netlink_deliver_tap_kernel net/netlink/af_netlink.c:343 [inline] netlink_unicast_kernel net/netlink/af_netlink.c:1324 [inline] netlink_unicast+0x545/0x690 net/netlink/af_netlink.c:1351 netlink_sendmsg+0x6c3/0xc50 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xc3/0x120 net/socket.c:661 ___sys_sendmsg+0x7bb/0x8e0 net/socket.c:2227 __sys_sendmsg net/socket.c:2265 [inline] __do_sys_sendmsg net/socket.c:2274 [inline] __se_sys_sendmsg net/socket.c:2272 [inline] __x64_sys_sendmsg+0x132/0x220 net/socket.c:2272 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f2ac208cfe9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f2ac09e1168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f2ac21a0030 RCX: 00007f2ac208cfe9 RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000010 RBP: 00007f2ac20e708d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc54a9468f R14: 00007f2ac09e1300 R15: 0000000000022000 Modules linked in: ---[ end trace 4321e30a639d2eee ]--- RIP: 0010:dequeue_head net/sched/sch_fq_codel.c:126 [inline] RIP: 0010:fq_codel_drop net/sched/sch_fq_codel.c:174 [inline] RIP: 0010:fq_codel_enqueue+0x8ad/0x1100 net/sched/sch_fq_codel.c:236 Code: 59 8e ca fa 45 39 ec 0f 83 cb 00 00 00 e8 5b 8d ca fa 48 8b 44 24 10 80 38 00 0f 85 69 06 00 00 49 8b 07 48 89 c2 48 c1 ea 03 <42> 80 3c 32 00 0f 85 3d 06 00 00 48 8b 10 48 8d 78 28 49 89 17 48 RSP: 0018:ffff8880508cf6d0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc90008044000 RDX: 0000000000000000 RSI: ffffffff8697f815 RDI: 0000000000000004 RBP: ffff8880508cf890 R08: ffffffff8c665058 R09: 0000000000000400 R10: 0000000000000004 R11: ffffffff8c66505b R12: 0000000000000400 R13: 0000000000000000 R14: dffffc0000000000 R15: ffff888052d20b80 FS: 00007f2ac09e1700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fff3fcb9507 CR3: 00000000aa410000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 59 pop %rcx 1: 8e ca mov %edx,%cs 3: fa cli 4: 45 39 ec cmp %r13d,%r12d 7: 0f 83 cb 00 00 00 jae 0xd8 d: e8 5b 8d ca fa callq 0xfaca8d6d 12: 48 8b 44 24 10 mov 0x10(%rsp),%rax 17: 80 38 00 cmpb $0x0,(%rax) 1a: 0f 85 69 06 00 00 jne 0x689 20: 49 8b 07 mov (%r15),%rax 23: 48 89 c2 mov %rax,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 42 80 3c 32 00 cmpb $0x0,(%rdx,%r14,1) <-- trapping instruction 2f: 0f 85 3d 06 00 00 jne 0x672 35: 48 8b 10 mov (%rax),%rdx 38: 48 8d 78 28 lea 0x28(%rax),%rdi 3c: 49 89 17 mov %rdx,(%r15) 3f: 48 rex.W