==================================================================
BUG: KASAN: use-after-free in hlist_add_head include/linux/list.h:814 [inline]
BUG: KASAN: use-after-free in enqueue_timer+0x9e/0x2c0 kernel/time/timer.c:541
Write of size 8 at addr ffff8881cbb131c8 by task syz.5.897/3451
CPU: 0 PID: 3451 Comm: syz.5.897 Not tainted 5.4.292-syzkaller-00021-gcd8e74fa0fa3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
__dump_stack+0x1e/0x20 lib/dump_stack.c:77
dump_stack+0x15b/0x1b8 lib/dump_stack.c:118
print_address_description+0x8d/0x4c0 mm/kasan/report.c:384
__kasan_report+0xef/0x120 mm/kasan/report.c:516
kasan_report+0x30/0x60 mm/kasan/common.c:653
__asan_report_store8_noabort+0x17/0x20 mm/kasan/generic_report.c:137
hlist_add_head include/linux/list.h:814 [inline]
enqueue_timer+0x9e/0x2c0 kernel/time/timer.c:541
__internal_add_timer kernel/time/timer.c:554 [inline]
internal_add_timer+0x208/0x3e0 kernel/time/timer.c:604
__mod_timer+0x5ab/0x1150 kernel/time/timer.c:1065
mod_timer+0x1f/0x30 kernel/time/timer.c:1117
can_stat_update+0xbab/0xc40 net/can/proc.c:186
call_timer_fn+0x3c/0x380 kernel/time/timer.c:1448
expire_timers kernel/time/timer.c:1493 [inline]
__run_timers+0x81d/0xb60 kernel/time/timer.c:1817
run_timer_softirq+0x6a/0xf0 kernel/time/timer.c:1830
__do_softirq+0x236/0x660 kernel/softirq.c:292
do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1086
do_softirq+0xf9/0x140 kernel/softirq.c:337
__local_bh_enable_ip+0x70/0x80 kernel/softirq.c:189
local_bh_enable+0x1f/0x30 include/linux/bottom_half.h:32
rcu_read_unlock_bh include/linux/rcupdate.h:739 [inline]
__dev_queue_xmit+0x136e/0x2400 net/core/dev.c:3848
dev_queue_xmit+0x17/0x20 net/core/dev.c:3854
__bpf_tx_skb net/core/filter.c:2063 [inline]
__bpf_redirect_no_mac net/core/filter.c:2097 [inline]
__bpf_redirect+0x699/0xe30 net/core/filter.c:2120
____bpf_clone_redirect net/core/filter.c:2151 [inline]
bpf_clone_redirect+0x242/0x380 net/core/filter.c:2123
bpf_prog_973cd02a7a0e8181+0xe41/0x1000
bpf_call_func include/linux/filter.h:627 [inline]
bpf_test_run+0x1ea/0x5d0 net/bpf/test_run.c:44
bpf_prog_test_run_skb+0x721/0xdc0 net/bpf/test_run.c:311
bpf_prog_test_run+0x21a/0x2a0 kernel/bpf/syscall.c:2124
__do_sys_bpf kernel/bpf/syscall.c:2909 [inline]
__se_sys_bpf+0x49a/0x570 kernel/bpf/syscall.c:2849
__x64_sys_bpf+0x7b/0x90 kernel/bpf/syscall.c:2849
do_syscall_64+0xcf/0x170 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
RIP: 0033:0x7f0eda7e6969
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f0ed8e4f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f0edaa0dfa0 RCX: 00007f0eda7e6969
RDX: 000000000000002c RSI: 0000200000000080 RDI: 000000000000000a
RBP: 00007f0eda868ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f0edaa0dfa0 R15: 00007fff13475fc8
Allocated by task 3381:
save_stack mm/kasan/common.c:70 [inline]
set_track mm/kasan/common.c:78 [inline]
__kasan_kmalloc+0x162/0x200 mm/kasan/common.c:529
kasan_slab_alloc+0x12/0x20 mm/kasan/common.c:537
slab_post_alloc_hook mm/slab.h:584 [inline]
slab_alloc_node mm/slub.c:2829 [inline]
slab_alloc mm/slub.c:2837 [inline]
kmem_cache_alloc+0xe2/0x270 mm/slub.c:2842
skb_clone+0x1e9/0x380 net/core/skbuff.c:1467
dev_queue_xmit_nit+0x198/0xa50 net/core/dev.c:1966
xmit_one net/core/dev.c:3217 [inline]
dev_hard_start_xmit+0x169/0x6f0 net/core/dev.c:3237
sch_direct_xmit+0x24b/0x8b0 net/sched/sch_generic.c:336
qdisc_restart net/sched/sch_generic.c:401 [inline]
__qdisc_run+0x954/0x1370 net/sched/sch_generic.c:409
qdisc_run+0x10a/0x300 include/net/pkt_sched.h:122
__dev_xmit_skb net/core/dev.c:3432 [inline]
__dev_queue_xmit+0x9dd/0x2400 net/core/dev.c:3787
dev_queue_xmit+0x17/0x20 net/core/dev.c:3854
neigh_hh_output include/net/neighbour.h:502 [inline]
neigh_output include/net/neighbour.h:516 [inline]
ip_finish_output2+0xac7/0xef0 net/ipv4/ip_output.c:236
__ip_finish_output+0x3fb/0x720 net/ipv4/ip_output.c:258
ip_finish_output+0x33/0x1f0 net/ipv4/ip_output.c:326
NF_HOOK_COND include/linux/netfilter.h:292 [inline]
ip_output+0x1a2/0x310 net/ipv4/ip_output.c:440
dst_output include/net/dst.h:438 [inline]
ip_local_out net/ipv4/ip_output.c:126 [inline]
__ip_queue_xmit+0x108c/0x1ae0 net/ipv4/ip_output.c:541
ip_queue_xmit+0x4d/0x70 include/net/ip.h:242
__tcp_transmit_skb+0x1c3d/0x3130 net/ipv4/tcp_output.c:1179
tcp_transmit_skb net/ipv4/tcp_output.c:1195 [inline]
tcp_write_xmit+0x16fb/0x5ad0 net/ipv4/tcp_output.c:2478
__tcp_push_pending_frames+0x9c/0x300 net/ipv4/tcp_output.c:2660
tcp_push_pending_frames include/net/tcp.h:1861 [inline]
tcp_data_snd_check net/ipv4/tcp_input.c:5334 [inline]
tcp_rcv_established+0xcf5/0x18c0 net/ipv4/tcp_input.c:5744
tcp_v4_do_rcv+0x4c1/0x7c0 net/ipv4/tcp_ipv4.c:1598
tcp_v4_rcv+0x22da/0x2900 net/ipv4/tcp_ipv4.c:1990
ip_protocol_deliver_rcu+0x2fa/0x650 net/ipv4/ip_input.c:204
ip_local_deliver_finish net/ipv4/ip_input.c:231 [inline]
NF_HOOK include/linux/netfilter.h:303 [inline]
ip_local_deliver+0x2de/0x540 net/ipv4/ip_input.c:252
dst_input include/net/dst.h:444 [inline]
ip_sublist_rcv_finish net/ipv4/ip_input.c:541 [inline]
ip_list_rcv_finish net/ipv4/ip_input.c:579 [inline]
ip_sublist_rcv+0x9f4/0xa70 net/ipv4/ip_input.c:587
ip_list_rcv+0x38d/0x3d0 net/ipv4/ip_input.c:621
__netif_receive_skb_list_ptype net/core/dev.c:5034 [inline]
__netif_receive_skb_list_core+0x571/0x760 net/core/dev.c:5082
__netif_receive_skb_list net/core/dev.c:5134 [inline]
netif_receive_skb_list_internal+0x7e9/0xa70 net/core/dev.c:5229
gro_normal_list net/core/dev.c:5340 [inline]
napi_complete_done+0x210/0x540 net/core/dev.c:6071
virtqueue_napi_complete drivers/net/virtio_net.c:357 [inline]
virtnet_poll+0x872/0xed0 drivers/net/virtio_net.c:1516
napi_poll net/core/dev.c:6386 [inline]
net_rx_action+0x447/0xe50 net/core/dev.c:6454
__do_softirq+0x236/0x660 kernel/softirq.c:292
Freed by task 3381:
save_stack mm/kasan/common.c:70 [inline]
set_track mm/kasan/common.c:78 [inline]
kasan_set_free_info mm/kasan/common.c:345 [inline]
__kasan_slab_free+0x1c3/0x280 mm/kasan/common.c:487
kasan_slab_free+0xe/0x10 mm/kasan/common.c:496
slab_free_hook mm/slub.c:1455 [inline]
slab_free_freelist_hook+0xb7/0x180 mm/slub.c:1494
slab_free mm/slub.c:3080 [inline]
kmem_cache_free+0x10c/0x2c0 mm/slub.c:3096
kfree_skbmem+0x10c/0x180 net/core/skbuff.c:654
__kfree_skb net/core/skbuff.c:690 [inline]
consume_skb+0xb5/0x240 net/core/skbuff.c:849
packet_rcv+0x14e/0x11a0 net/packet/af_packet.c:2218
dev_queue_xmit_nit+0x9c8/0xa50 net/core/dev.c:1998
xmit_one net/core/dev.c:3217 [inline]
dev_hard_start_xmit+0x169/0x6f0 net/core/dev.c:3237
sch_direct_xmit+0x24b/0x8b0 net/sched/sch_generic.c:336
qdisc_restart net/sched/sch_generic.c:401 [inline]
__qdisc_run+0x954/0x1370 net/sched/sch_generic.c:409
qdisc_run+0x10a/0x300 include/net/pkt_sched.h:122
__dev_xmit_skb net/core/dev.c:3432 [inline]
__dev_queue_xmit+0x9dd/0x2400 net/core/dev.c:3787
dev_queue_xmit+0x17/0x20 net/core/dev.c:3854
neigh_hh_output include/net/neighbour.h:502 [inline]
neigh_output include/net/neighbour.h:516 [inline]
ip_finish_output2+0xac7/0xef0 net/ipv4/ip_output.c:236
__ip_finish_output+0x3fb/0x720 net/ipv4/ip_output.c:258
ip_finish_output+0x33/0x1f0 net/ipv4/ip_output.c:326
NF_HOOK_COND include/linux/netfilter.h:292 [inline]
ip_output+0x1a2/0x310 net/ipv4/ip_output.c:440
dst_output include/net/dst.h:438 [inline]
ip_local_out net/ipv4/ip_output.c:126 [inline]
__ip_queue_xmit+0x108c/0x1ae0 net/ipv4/ip_output.c:541
ip_queue_xmit+0x4d/0x70 include/net/ip.h:242
__tcp_transmit_skb+0x1c3d/0x3130 net/ipv4/tcp_output.c:1179
tcp_transmit_skb net/ipv4/tcp_output.c:1195 [inline]
tcp_write_xmit+0x16fb/0x5ad0 net/ipv4/tcp_output.c:2478
__tcp_push_pending_frames+0x9c/0x300 net/ipv4/tcp_output.c:2660
tcp_push_pending_frames include/net/tcp.h:1861 [inline]
tcp_data_snd_check net/ipv4/tcp_input.c:5334 [inline]
tcp_rcv_established+0xcf5/0x18c0 net/ipv4/tcp_input.c:5744
tcp_v4_do_rcv+0x4c1/0x7c0 net/ipv4/tcp_ipv4.c:1598
tcp_v4_rcv+0x22da/0x2900 net/ipv4/tcp_ipv4.c:1990
ip_protocol_deliver_rcu+0x2fa/0x650 net/ipv4/ip_input.c:204
ip_local_deliver_finish net/ipv4/ip_input.c:231 [inline]
NF_HOOK include/linux/netfilter.h:303 [inline]
ip_local_deliver+0x2de/0x540 net/ipv4/ip_input.c:252
dst_input include/net/dst.h:444 [inline]
ip_sublist_rcv_finish net/ipv4/ip_input.c:541 [inline]
ip_list_rcv_finish net/ipv4/ip_input.c:579 [inline]
ip_sublist_rcv+0x9f4/0xa70 net/ipv4/ip_input.c:587
ip_list_rcv+0x38d/0x3d0 net/ipv4/ip_input.c:621
__netif_receive_skb_list_ptype net/core/dev.c:5034 [inline]
__netif_receive_skb_list_core+0x571/0x760 net/core/dev.c:5082
__netif_receive_skb_list net/core/dev.c:5134 [inline]
netif_receive_skb_list_internal+0x7e9/0xa70 net/core/dev.c:5229
gro_normal_list net/core/dev.c:5340 [inline]
napi_complete_done+0x210/0x540 net/core/dev.c:6071
virtqueue_napi_complete drivers/net/virtio_net.c:357 [inline]
virtnet_poll+0x872/0xed0 drivers/net/virtio_net.c:1516
napi_poll net/core/dev.c:6386 [inline]
net_rx_action+0x447/0xe50 net/core/dev.c:6454
__do_softirq+0x236/0x660 kernel/softirq.c:292
The buggy address belongs to the object at ffff8881cbb13140
which belongs to the cache skbuff_head_cache of size 240
The buggy address is located 136 bytes inside of
240-byte region [ffff8881cbb13140, ffff8881cbb13230)
The buggy address belongs to the page:
page:ffffea00072ec4c0 refcount:1 mapcount:0 mapping:ffff8881f5e64c80 index:0x0
flags: 0x8000000000000200(slab)
raw: 8000000000000200 dead000000000100 dead000000000122 ffff8881f5e64c80
raw: 0000000000000000 00000000000c000c 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x112a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_HARDWALL)
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook mm/page_alloc.c:2165 [inline]
prep_new_page+0x35e/0x370 mm/page_alloc.c:2171
get_page_from_freelist+0x1296/0x1310 mm/page_alloc.c:3794
__alloc_pages_nodemask+0x202/0x4b0 mm/page_alloc.c:4894
alloc_slab_page+0x3c/0x3b0 mm/slub.c:343
allocate_slab mm/slub.c:1683 [inline]
new_slab+0x93/0x420 mm/slub.c:1749
new_slab_objects mm/slub.c:2505 [inline]
___slab_alloc+0x29e/0x420 mm/slub.c:2667
__slab_alloc+0x63/0xa0 mm/slub.c:2707
slab_alloc_node mm/slub.c:2792 [inline]
slab_alloc mm/slub.c:2837 [inline]
kmem_cache_alloc+0x12c/0x270 mm/slub.c:2842
kmem_cache_alloc_node include/linux/slab.h:427 [inline]
__alloc_skb+0x9e/0x500 net/core/skbuff.c:198
alloc_skb include/linux/skbuff.h:1080 [inline]
nlmsg_new include/net/netlink.h:888 [inline]
inet6_rt_notify+0x287/0x470 net/ipv6/route.c:5996
fib6_add_rt2node net/ipv6/ip6_fib.c:1187 [inline]
fib6_add+0x21a3/0x3ad0 net/ipv6/ip6_fib.c:1416
__ip6_ins_rt net/ipv6/route.c:1322 [inline]
ip6_ins_rt+0xc5/0x110 net/ipv6/route.c:1332
__ipv6_ifa_notify+0x4cb/0xdb0 net/ipv6/addrconf.c:6094
ipv6_ifa_notify net/ipv6/addrconf.c:6134 [inline]
addrconf_dad_completed+0x183/0xe90 net/ipv6/addrconf.c:4234
addrconf_dad_work+0xc0d/0x1400 net/ipv6/addrconf.c:4038
process_one_work+0x73b/0xcc0 kernel/workqueue.c:2290
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1176 [inline]
__free_pages_ok+0x7e4/0x910 mm/page_alloc.c:1438
free_the_page mm/page_alloc.c:4956 [inline]
__free_pages+0x8c/0x110 mm/page_alloc.c:4962
kfree+0x1ca/0x260 mm/slub.c:4068
kvfree+0x4c/0x50 mm/util.c:625
netdev_freemem+0x3f/0x60 net/core/dev.c:9583
netdev_release+0x7f/0xb0 net/core/net-sysfs.c:1743
device_release+0x70/0x1a0 drivers/base/core.c:1776
kobject_cleanup lib/kobject.c:716 [inline]
kobject_release lib/kobject.c:747 [inline]
kref_put include/linux/kref.h:65 [inline]
kobject_put+0x1fe/0x2c0 lib/kobject.c:764
put_device+0x1f/0x30 drivers/base/core.c:3010
free_netdev+0x27e/0x320 net/core/dev.c:9746
tun_set_iff+0x87c/0xe00 drivers/net/tun.c:2924
__tun_chr_ioctl+0x771/0x18a0 drivers/net/tun.c:3187
tun_chr_ioctl+0x2a/0x40 drivers/net/tun.c:3470
do_vfs_ioctl+0x753/0x13f0 fs/ioctl.c:47
ksys_ioctl fs/ioctl.c:742 [inline]
__do_sys_ioctl fs/ioctl.c:749 [inline]
__se_sys_ioctl fs/ioctl.c:747 [inline]
__x64_sys_ioctl+0xe1/0x120 fs/ioctl.c:747
do_syscall_64+0xcf/0x170 arch/x86/entry/common.c:290
Memory state around the buggy address:
ffff8881cbb13080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc
ffff8881cbb13100: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
>ffff8881cbb13180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8881cbb13200: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc
ffff8881cbb13280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
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: 0 PID: 3451 Comm: syz.5.897 Tainted: G B 5.4.292-syzkaller-00021-gcd8e74fa0fa3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:__hlist_del include/linux/list.h:791 [inline]
RIP: 0010:detach_timer kernel/time/timer.c:824 [inline]
RIP: 0010:expire_timers kernel/time/timer.c:1482 [inline]
RIP: 0010:__run_timers+0x74b/0xb60 kernel/time/timer.c:1817
Code: 89 ef e8 88 d8 3c 00 4d 89 65 00 4d 85 e4 74 2e e8 aa dd 0e 00 49 83 c4 08 4c 89 e0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 4c 89 e7 e8 57 d8 3c 00 4d 89 2c 24 eb 05 e8 7c
RSP: 0018:ffff8881f6e09da0 EFLAGS: 00010003
RAX: 000000000004003d RBX: 1ffff11039762639 RCX: dffffc0000000000
RDX: 0000000000000103 RSI: 0000000000000008 RDI: ffff8881cbb131c8
RBP: ffff8881f6e09f20 R08: 0000000000000004 R09: 0000000000000003
R10: ffffed103edc13a4 R11: 1ffff1103edc13a4 R12: 00000000002001ec
R13: ffff8881f6e09e60 R14: ffff8881cbb131c8 R15: 1ffff11039762638
FS: 00007f0ed8e4f6c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2d9be0 CR3: 00000001e307b000 CR4: 00000000003406b0
DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
run_timer_softirq+0x6a/0xf0 kernel/time/timer.c:1830
__do_softirq+0x236/0x660 kernel/softirq.c:292
do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1086
do_softirq+0xf9/0x140 kernel/softirq.c:337
__local_bh_enable_ip+0x70/0x80 kernel/softirq.c:189
local_bh_enable+0x1f/0x30 include/linux/bottom_half.h:32
rcu_read_unlock_bh include/linux/rcupdate.h:739 [inline]
__dev_queue_xmit+0x136e/0x2400 net/core/dev.c:3848
dev_queue_xmit+0x17/0x20 net/core/dev.c:3854
__bpf_tx_skb net/core/filter.c:2063 [inline]
__bpf_redirect_no_mac net/core/filter.c:2097 [inline]
__bpf_redirect+0x699/0xe30 net/core/filter.c:2120
____bpf_clone_redirect net/core/filter.c:2151 [inline]
bpf_clone_redirect+0x242/0x380 net/core/filter.c:2123
bpf_prog_973cd02a7a0e8181+0xe41/0x1000
bpf_call_func include/linux/filter.h:627 [inline]
bpf_test_run+0x1ea/0x5d0 net/bpf/test_run.c:44
bpf_prog_test_run_skb+0x721/0xdc0 net/bpf/test_run.c:311
bpf_prog_test_run+0x21a/0x2a0 kernel/bpf/syscall.c:2124
__do_sys_bpf kernel/bpf/syscall.c:2909 [inline]
__se_sys_bpf+0x49a/0x570 kernel/bpf/syscall.c:2849
__x64_sys_bpf+0x7b/0x90 kernel/bpf/syscall.c:2849
do_syscall_64+0xcf/0x170 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
RIP: 0033:0x7f0eda7e6969
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f0ed8e4f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f0edaa0dfa0 RCX: 00007f0eda7e6969
RDX: 000000000000002c RSI: 0000200000000080 RDI: 000000000000000a
RBP: 00007f0eda868ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f0edaa0dfa0 R15: 00007fff13475fc8
Modules linked in:
---[ end trace e20be87468f54bfc ]---
RIP: 0010:__hlist_del include/linux/list.h:791 [inline]
RIP: 0010:detach_timer kernel/time/timer.c:824 [inline]
RIP: 0010:expire_timers kernel/time/timer.c:1482 [inline]
RIP: 0010:__run_timers+0x74b/0xb60 kernel/time/timer.c:1817
Code: 89 ef e8 88 d8 3c 00 4d 89 65 00 4d 85 e4 74 2e e8 aa dd 0e 00 49 83 c4 08 4c 89 e0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 4c 89 e7 e8 57 d8 3c 00 4d 89 2c 24 eb 05 e8 7c
RSP: 0018:ffff8881f6e09da0 EFLAGS: 00010003
RAX: 000000000004003d RBX: 1ffff11039762639 RCX: dffffc0000000000
RDX: 0000000000000103 RSI: 0000000000000008 RDI: ffff8881cbb131c8
RBP: ffff8881f6e09f20 R08: 0000000000000004 R09: 0000000000000003
R10: ffffed103edc13a4 R11: 1ffff1103edc13a4 R12: 00000000002001ec
R13: ffff8881f6e09e60 R14: ffff8881cbb131c8 R15: 1ffff11039762638
FS: 00007f0ed8e4f6c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2d9be0 CR3: 00000001e307b000 CR4: 00000000003406b0
DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
----------------
Code disassembly (best guess):
0: 89 ef mov %ebp,%edi
2: e8 88 d8 3c 00 call 0x3cd88f
7: 4d 89 65 00 mov %r12,0x0(%r13)
b: 4d 85 e4 test %r12,%r12
e: 74 2e je 0x3e
10: e8 aa dd 0e 00 call 0xeddbf
15: 49 83 c4 08 add $0x8,%r12
19: 4c 89 e0 mov %r12,%rax
1c: 48 c1 e8 03 shr $0x3,%rax
20: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx
27: fc ff df
* 2a: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1) <-- trapping instruction
2e: 74 08 je 0x38
30: 4c 89 e7 mov %r12,%rdi
33: e8 57 d8 3c 00 call 0x3cd88f
38: 4d 89 2c 24 mov %r13,(%r12)
3c: eb 05 jmp 0x43
3e: e8 .byte 0xe8
3f: 7c .byte 0x7c