====================================== | WAIT TIMEOUT stdout | | [ 4289.219028][T24223] general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN NOPTI | [ 4289.219392][T24223] KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] [ 4289.219768][T24223] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [4289.220041][T24223] RIP: 0010:nh_valid_get_del_req (./include/net/netlink.h:1680 net/ipv4/nexthop.c:3235) [ 4289.220210][T24223] Code: ea 03 80 3c 02 00 0f 85 7a 02 00 00 48 8b 5e 70 48 85 db 74 6b 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 04 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 51 All code ======== 0: ea (bad) 1: 03 80 3c 02 00 0f add 0xf00023c(%rax),%eax 7: 85 7a 02 test %edi,0x2(%rdx) a: 00 00 add %al,(%rax) c: 48 8b 5e 70 mov 0x70(%rsi),%rbx 10: 48 85 db test %rbx,%rbx 13: 74 6b je 0x80 15: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 1c: fc ff df 1f: 48 8d 7b 04 lea 0x4(%rbx),%rdi 23: 48 89 fa mov %rdi,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx 2a:* 0f b6 14 02 movzbl (%rdx,%rax,1),%edx <-- trapping instruction 2e: 48 89 f8 mov %rdi,%rax 31: 83 e0 07 and $0x7,%eax 34: 83 c0 03 add $0x3,%eax 37: 38 d0 cmp %dl,%al 39: 7c 08 jl 0x43 3b: 84 d2 test %dl,%dl 3d: 0f .byte 0xf 3e: 85 .byte 0x85 3f: 51 push %rcx Code starting with the faulting instruction =========================================== 0: 0f b6 14 02 movzbl (%rdx,%rax,1),%edx 4: 48 89 f8 mov %rdi,%rax 7: 83 e0 07 and $0x7,%eax a: 83 c0 03 add $0x3,%eax d: 38 d0 cmp %dl,%al f: 7c 08 jl 0x19 11: 84 d2 test %dl,%dl 13: 0f .byte 0xf 14: 85 .byte 0x85 15: 51 push %rcx [ 4289.220644][T24223] RSP: 0018:ffffc9000384f4f8 EFLAGS: 00010247 [ 4289.220812][T24223] RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffffc9000384f560 [ 4289.220994][T24223] RDX: 0000000000000000 RSI: ffffc9000384f5c0 RDI: 0000000000000005 [ 4289.221182][T24223] RBP: ffff88802433e740 R08: ffffc9000384f840 R09: 0000000000000004 [ 4289.221381][T24223] R10: dffffc0000000000 R11: 0000000000000001 R12: ffffc9000384f570 [ 4289.221564][T24223] R13: 0000000000000000 R14: ffffc9000384f840 R15: ffffc9000384f5c0 [ 4289.221750][T24223] FS: 00007f7a45af1c40(0000) GS:ffff888036100000(0000) knlGS:0000000000000000 [ 4289.221973][T24223] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 4289.222131][T24223] CR2: 0000000000a31928 CR3: 000000002306c006 CR4: 0000000000770ef0 [ 4289.222323][T24223] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 4289.222515][T24223] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 4289.222700][T24223] PKRU: 55555554 [ 4289.222794][T24223] Call Trace: [ 4289.222899][T24223] [4289.222963][T24223] ? die_addr (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:460) [4289.223062][T24223] ? exc_general_protection (arch/x86/kernel/traps.c:701 arch/x86/kernel/traps.c:643) [4289.223188][T24223] ? asm_exc_general_protection (./arch/x86/include/asm/idtentry.h:564) [4289.223318][T24223] ? nh_valid_get_del_req (./include/net/netlink.h:1680 net/ipv4/nexthop.c:3235) [4289.223439][T24223] ? __nla_parse (lib/nlattr.c:732) [4289.223574][T24223] rtm_del_nexthop (net/ipv4/nexthop.c:3264) [4289.223729][T24223] ? __pfx_rtm_del_nexthop (net/ipv4/nexthop.c:3245) [4289.223859][T24223] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [4289.223990][T24223] ? rtnetlink_rcv_msg (net/core/rtnetlink.c:6593) [4289.224116][T24223] ? __mutex_lock (./arch/x86/include/asm/preempt.h:94 kernel/locking/mutex.c:618 kernel/locking/mutex.c:752) [4289.224241][T24223] ? rtnetlink_rcv_msg (net/core/rtnetlink.c:6593) [4289.224364][T24223] ? __pfx___mutex_lock (kernel/locking/mutex.c:751) [4289.224488][T24223] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) [4289.224609][T24223] ? lock_is_held_type (kernel/locking/lockdep.c:5830) [4289.224739][T24223] rtnetlink_rcv_msg (net/core/rtnetlink.c:6595) [4289.224864][T24223] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6489) [4289.224983][T24223] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) [4289.225107][T24223] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [4289.225202][T24223] ? __lock_acquire (kernel/locking/lockdep.c:5137) [4289.225323][T24223] netlink_rcv_skb (net/netlink/af_netlink.c:2559) [4289.225449][T24223] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6489) [4289.225570][T24223] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2536) [4289.225692][T24223] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) [4289.225828][T24223] ? __pfx___netlink_lookup (net/netlink/af_netlink.c:512) [4289.225955][T24223] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [4289.226077][T24223] ? netlink_deliver_tap (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:783 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333) [4289.226204][T24223] ? netlink_deliver_tap (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:783 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333) [4289.226331][T24223] ? netlink_deliver_tap (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:783 net/netlink/af_netlink.c:340) [4289.226457][T24223] netlink_unicast (net/netlink/af_netlink.c:1335 net/netlink/af_netlink.c:1361) [4289.226582][T24223] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1346) [4289.226716][T24223] ? find_held_lock (kernel/locking/lockdep.c:5244) [4289.226847][T24223] netlink_sendmsg (net/netlink/af_netlink.c:1905) [4289.226970][T24223] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1824) [4289.227096][T24223] ? __might_fault (mm/memory.c:6080 mm/memory.c:6073) [4289.227220][T24223] ? __import_iovec (lib/iov_iter.c:1261 lib/iov_iter.c:1277) [4289.227342][T24223] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2584) [4289.227470][T24223] ? __pfx_____sys_sendmsg (net/socket.c:2530) [4289.227590][T24223] ? __pfx_copy_msghdr_from_user (net/socket.c:2510) [4289.227756][T24223] ___sys_sendmsg (net/socket.c:2640) [4289.227877][T24223] ? __pfx____sys_sendmsg (net/socket.c:2627) [4289.227999][T24223] ? kfree (./include/trace/events/kmem.h:94 mm/slub.c:4396) [4289.228099][T24223] ? ___sys_recvmsg (net/socket.c:2835) [4289.228220][T24223] ? __pfx____sys_recvmsg (net/socket.c:2835) [4289.228346][T24223] ? find_held_lock (kernel/locking/lockdep.c:5244) [4289.228468][T24223] ? __might_fault (mm/memory.c:6080 mm/memory.c:6073) [4289.228588][T24223] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) [4289.228719][T24223] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [4289.228845][T24223] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) [4289.228968][T24223] __sys_sendmsg (./include/linux/file.h:32 net/socket.c:2669) [4289.229086][T24223] ? __pfx___sys_sendmsg (net/socket.c:2655) [4289.229210][T24223] ? __pfx_rseq_ip_fixup (kernel/rseq.c:275) [4289.229332][T24223] ? rseq_update_cpu_node_id (./include/trace/events/rseq.h:11 kernel/rseq.c:108) [4289.229455][T24223] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [4289.229575][T24223] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) [ 4289.229737][T24223] RIP: 0033:0x7f7a45cfa7b7 [ 4289.229870][T24223] Code: 0a 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10 All code ======== 0: 0a 00 or (%rax),%al 2: f7 d8 neg %eax 4: 64 89 02 mov %eax,%fs:(%rdx) 7: 48 c7 c0 ff ff ff ff mov $0xffffffffffffffff,%rax e: eb b9 jmp 0xffffffffffffffc9 10: 0f 1f 00 nopl (%rax) 13: f3 0f 1e fa endbr64 17: 64 8b 04 25 18 00 00 mov %fs:0x18,%eax 1e: 00 1f: 85 c0 test %eax,%eax 21: 75 10 jne 0x33 23: b8 2e 00 00 00 mov $0x2e,%eax 28: 0f 05 syscall 2a:* 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax <-- trapping instruction 30: 77 51 ja 0x83 32: c3 ret 33: 48 83 ec 28 sub $0x28,%rsp 37: 89 54 24 1c mov %edx,0x1c(%rsp) 3b: 48 89 74 24 10 mov %rsi,0x10(%rsp) Code starting with the faulting instruction =========================================== 0: 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax 6: 77 51 ja 0x59 8: c3 ret 9: 48 83 ec 28 sub $0x28,%rsp d: 89 54 24 1c mov %edx,0x1c(%rsp) 11: 48 89 74 24 10 mov %rsi,0x10(%rsp) [ 4289.230303][T24223] RSP: 002b:00007ffc41fdb6e8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 4289.230489][T24223] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007f7a45cfa7b7 [ 4289.230674][T24223] RDX: 0000000000000000 RSI: 00007ffc41fdb750 RDI: 0000000000000006 [ 4289.230855][T24223] RBP: 00007ffc41fdb9e8 R08: 0000000000000004 R09: 0000000000000078 [ 4289.231049][T24223] R10: 000000000000009b R11: 0000000000000246 R12: 0000000000495540 Finger prints: nh_valid_get_del_req:rtm_del_nexthop:rtnetlink_rcv_msg:netlink_rcv_skb