====================================== | WAIT TIMEOUT stdout | | [ 3988.226862][T28877] general protection fault, probably for non-canonical address 0xdffffc000000000b: 0000 [#1] PREEMPT SMP KASAN NOPTI | [ 3988.227250][T28877] KASAN: null-ptr-deref in range [0x0000000000000058-0x000000000000005f] [ 3988.227684][T28877] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [3988.228002][T28877] RIP: 0010:nh_valid_get_del_req (./include/net/netlink.h:1680 net/ipv4/nexthop.c:3235) [ 3988.228185][T28877] 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 [ 3988.228667][T28877] RSP: 0018:ffffc900012bf4f8 EFLAGS: 00010203 [ 3988.228840][T28877] RAX: dffffc0000000000 RBX: 0000000000000059 RCX: ffffc900012bf560 [ 3988.229063][T28877] RDX: 000000000000000b RSI: ffffc900012bf5c0 RDI: 000000000000005d [ 3988.229272][T28877] RBP: ffff888022bf7100 R08: ffffc900012bf840 R09: 0000000000000004 [ 3988.229474][T28877] R10: dffffc0000000000 R11: 0000000000000001 R12: ffffc900012bf570 [ 3988.229677][T28877] R13: 0000000000000000 R14: ffffc900012bf840 R15: ffffc900012bf5c0 [ 3988.229883][T28877] FS: 00007fa8c0c05c40(0000) GS:ffff888036000000(0000) knlGS:0000000000000000 [ 3988.230118][T28877] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 3988.230294][T28877] CR2: 000055ac4befcdec CR3: 0000000020400005 CR4: 0000000000770ef0 [ 3988.230498][T28877] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 3988.230700][T28877] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 3988.230910][T28877] PKRU: 55555554 [ 3988.231012][T28877] Call Trace: [ 3988.231115][T28877] [3988.231185][T28877] ? die_addr (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:460) [3988.231297][T28877] ? exc_general_protection (arch/x86/kernel/traps.c:701 arch/x86/kernel/traps.c:643) [3988.231440][T28877] ? asm_exc_general_protection (./arch/x86/include/asm/idtentry.h:564) [3988.231580][T28877] ? nh_valid_get_del_req (./include/net/netlink.h:1680 net/ipv4/nexthop.c:3235) [3988.231716][T28877] ? __nla_parse (lib/nlattr.c:732) [3988.231852][T28877] rtm_del_nexthop (net/ipv4/nexthop.c:3264) [3988.231989][T28877] ? __pfx_rtm_del_nexthop (net/ipv4/nexthop.c:3245) [3988.232126][T28877] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [3988.232268][T28877] ? rtnetlink_rcv_msg (net/core/rtnetlink.c:6593) [3988.232405][T28877] ? __mutex_lock (./arch/x86/include/asm/preempt.h:94 kernel/locking/mutex.c:618 kernel/locking/mutex.c:752) [3988.232548][T28877] ? rtnetlink_rcv_msg (net/core/rtnetlink.c:6593) [3988.232683][T28877] ? __pfx___mutex_lock (kernel/locking/mutex.c:751) [3988.232818][T28877] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) [3988.232955][T28877] rtnetlink_rcv_msg (net/core/rtnetlink.c:6595) [3988.233090][T28877] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6489) [3988.233231][T28877] ? 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) [3988.233369][T28877] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [3988.233473][T28877] ? __lock_acquire (kernel/locking/lockdep.c:5137) [3988.233611][T28877] netlink_rcv_skb (net/netlink/af_netlink.c:2559) [3988.233749][T28877] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6489) [3988.233893][T28877] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2536) [3988.234026][T28877] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) [3988.234162][T28877] ? __pfx___netlink_lookup (net/netlink/af_netlink.c:512) [3988.234296][T28877] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [3988.234432][T28877] ? 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) [3988.234572][T28877] ? 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) [3988.234708][T28877] ? netlink_deliver_tap (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:783 net/netlink/af_netlink.c:340) [3988.234842][T28877] netlink_unicast (net/netlink/af_netlink.c:1335 net/netlink/af_netlink.c:1361) [3988.234982][T28877] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1346) [3988.235123][T28877] ? find_held_lock (kernel/locking/lockdep.c:5244) [3988.235263][T28877] netlink_sendmsg (net/netlink/af_netlink.c:1905) [3988.235409][T28877] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1824) [3988.235550][T28877] ? __might_fault (mm/memory.c:6080 mm/memory.c:6073) [3988.235699][T28877] ? __import_iovec (lib/iov_iter.c:1261 lib/iov_iter.c:1277) [3988.235841][T28877] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2584) [3988.235988][T28877] ? __pfx_____sys_sendmsg (net/socket.c:2530) [3988.236123][T28877] ? __pfx_copy_msghdr_from_user (net/socket.c:2510) [3988.236312][T28877] ___sys_sendmsg (net/socket.c:2640) [3988.236458][T28877] ? __pfx____sys_sendmsg (net/socket.c:2627) [3988.236600][T28877] ? kfree (./include/trace/events/kmem.h:94 mm/slub.c:4396) [3988.236707][T28877] ? ___sys_recvmsg (net/socket.c:2835) [3988.236846][T28877] ? __pfx____sys_recvmsg (net/socket.c:2835) [3988.236991][T28877] ? find_held_lock (kernel/locking/lockdep.c:5244) [3988.237133][T28877] ? __might_fault (mm/memory.c:6080 mm/memory.c:6073) [3988.237267][T28877] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) [3988.237403][T28877] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [3988.237537][T28877] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) [3988.237678][T28877] __sys_sendmsg (./include/linux/file.h:32 net/socket.c:2669) [3988.237812][T28877] ? __pfx___sys_sendmsg (net/socket.c:2655) [3988.237953][T28877] ? __pfx_rseq_ip_fixup (kernel/rseq.c:275) [3988.238101][T28877] ? rseq_update_cpu_node_id (./include/trace/events/rseq.h:11 kernel/rseq.c:108) [3988.238239][T28877] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [3988.238378][T28877] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) [ 3988.238548][T28877] RIP: 0033:0x7fa8c0e0e7b7 [ 3988.238691][T28877] 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) [ 3988.239176][T28877] RSP: 002b:00007fff5e5f9198 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 3988.239385][T28877] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007fa8c0e0e7b7 [ 3988.239589][T28877] RDX: 0000000000000000 RSI: 00007fff5e5f9200 RDI: 0000000000000006 [ 3988.239793][T28877] RBP: 00007fff5e5f9498 R08: 0000000000000004 R09: 0000000000000078 [ 3988.239995][T28877] R10: 000000000000009b R11: 0000000000000246 R12: 0000000000495540 Finger prints: nh_valid_get_del_req:rtm_del_nexthop:rtnetlink_rcv_msg:netlink_rcv_skb