BUG: unable to handle page fault for address: fffffffffffffc10 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD e997067 P4D e997067 PUD e999067 PMD 0 Oops: Oops: 0000 [#1] SMP KASAN NOPTI CPU: 0 UID: 0 PID: 28733 Comm: syz.0.4919 Tainted: G S L syzkaller #0 PREEMPT(full) Tainted: [S]=CPU_OUT_OF_SPEC, [L]=SOFTLOCKUP Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:strnlen+0x4b/0x80 lib/string.c:414 Code: 49 89 fc 48 89 f8 eb 09 48 83 c0 01 48 39 e8 74 1e 48 89 c2 48 89 c1 48 c1 ea 03 83 e1 07 0f b6 14 1a 38 ca 7f 04 84 d2 75 15 <80> 38 00 75 d9 4c 29 e0 48 83 c4 08 5b 5d 41 5c e9 40 87 07 00 48 RSP: 0018:ffffc90005b47130 EFLAGS: 00010246 RAX: fffffffffffffc10 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000010 RDI: fffffffffffffc10 RBP: fffffffffffffc20 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: fffffffffffffc10 R13: ffff88801c2f3e00 R14: 0000000000000006 R15: 0000000000000010 FS: 00007f8b160336c0(0000) GS:ffff8880d5dd8000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffffffffffffc10 CR3: 000000005c61f000 CR4: 0000000000352ef0 Call Trace: strnlen include/linux/fortify-string.h:183 [inline] __fortify_strlen include/linux/fortify-string.h:219 [inline] trace_event_get_offsets_drv_net_setup_tc net/mac80211/trace.h:2539 [inline] do_trace_event_raw_event_drv_net_setup_tc net/mac80211/trace.h:2539 [inline] trace_event_raw_event_drv_net_setup_tc+0x100/0x5d0 net/mac80211/trace.h:2539 __do_trace_drv_net_setup_tc net/mac80211/trace.h:2539 [inline] trace_drv_net_setup_tc net/mac80211/trace.h:2539 [inline] drv_net_setup_tc net/mac80211/driver-ops.h:1706 [inline] ieee80211_netdev_setup_tc+0x2c6/0x3e0 net/mac80211/iface.c:938 tcf_block_offload_cmd.isra.0+0x1c4/0x310 net/sched/cls_api.c:838 tcf_block_offload_bind net/sched/cls_api.c:875 [inline] tcf_block_get_ext+0x7ed/0x1950 net/sched/cls_api.c:1498 tcf_block_get+0xa8/0x100 net/sched/cls_api.c:1543 drr_init_qdisc+0x2e/0x100 net/sched/sch_drr.c:417 qdisc_create+0x47b/0x1060 net/sched/sch_api.c:1337 __tc_modify_qdisc net/sched/sch_api.c:1771 [inline] tc_modify_qdisc+0xdcf/0x2120 net/sched/sch_api.c:1835 rtnetlink_rcv_msg+0x3c9/0xe90 net/core/rtnetlink.c:7085 netlink_rcv_skb+0x159/0x420 net/netlink/af_netlink.c:2556 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] netlink_unicast+0x585/0x850 net/netlink/af_netlink.c:1345 netlink_sendmsg+0x8b0/0xda0 net/netlink/af_netlink.c:1900 sock_sendmsg_nosec net/socket.c:775 [inline] __sock_sendmsg net/socket.c:790 [inline] ____sys_sendmsg+0xa4d/0xbe0 net/socket.c:2684 ___sys_sendmsg+0x190/0x1e0 net/socket.c:2738 __sys_sendmsg+0x160/0x210 net/socket.c:2770 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f8b1519e019 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f8b16033028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f8b15425fa0 RCX: 00007f8b1519e019 RDX: 0000000000000000 RSI: 00002000000012c0 RDI: 0000000000000004 RBP: 00007f8b1523500c R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f8b15426038 R14: 00007f8b15425fa0 R15: 00007ffc3b8f3788 Modules linked in: CR2: fffffffffffffc10 ---[ end trace 0000000000000000 ]--- RIP: 0010:strnlen+0x4b/0x80 lib/string.c:414 Code: 49 89 fc 48 89 f8 eb 09 48 83 c0 01 48 39 e8 74 1e 48 89 c2 48 89 c1 48 c1 ea 03 83 e1 07 0f b6 14 1a 38 ca 7f 04 84 d2 75 15 <80> 38 00 75 d9 4c 29 e0 48 83 c4 08 5b 5d 41 5c e9 40 87 07 00 48 RSP: 0018:ffffc90005b47130 EFLAGS: 00010246 RAX: fffffffffffffc10 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000010 RDI: fffffffffffffc10 RBP: fffffffffffffc20 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: fffffffffffffc10 R13: ffff88801c2f3e00 R14: 0000000000000006 R15: 0000000000000010 FS: 00007f8b160336c0(0000) GS:ffff8880d5dd8000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffffffffffffc10 CR3: 000000005c61f000 CR4: 0000000000352ef0 ---------------- Code disassembly (best guess): 0: 49 89 fc mov %rdi,%r12 3: 48 89 f8 mov %rdi,%rax 6: eb 09 jmp 0x11 8: 48 83 c0 01 add $0x1,%rax c: 48 39 e8 cmp %rbp,%rax f: 74 1e je 0x2f 11: 48 89 c2 mov %rax,%rdx 14: 48 89 c1 mov %rax,%rcx 17: 48 c1 ea 03 shr $0x3,%rdx 1b: 83 e1 07 and $0x7,%ecx 1e: 0f b6 14 1a movzbl (%rdx,%rbx,1),%edx 22: 38 ca cmp %cl,%dl 24: 7f 04 jg 0x2a 26: 84 d2 test %dl,%dl 28: 75 15 jne 0x3f * 2a: 80 38 00 cmpb $0x0,(%rax) <-- trapping instruction 2d: 75 d9 jne 0x8 2f: 4c 29 e0 sub %r12,%rax 32: 48 83 c4 08 add $0x8,%rsp 36: 5b pop %rbx 37: 5d pop %rbp 38: 41 5c pop %r12 3a: e9 40 87 07 00 jmp 0x7877f 3f: 48 rex.W