==================================================================
BUG: KASAN: use-after-free in hlist_move_list include/linux/list.h:1014 [inline]
BUG: KASAN: use-after-free in collect_expired_timers kernel/time/timer.c:1625 [inline]
BUG: KASAN: use-after-free in __run_timers+0x340/0x9f0 kernel/time/timer.c:1861
Write of size 8 at addr ffff88811dad8a00 by task syz.2.99/657
CPU: 1 PID: 657 Comm: syz.2.99 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
Call Trace:
__dump_stack+0x21/0x24 lib/dump_stack.c:88
dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106
print_address_description+0x71/0x200 mm/kasan/report.c:316
print_report+0x4a/0x60 mm/kasan/report.c:420
kasan_report+0x122/0x150 mm/kasan/report.c:524
__asan_report_store8_noabort+0x17/0x20 mm/kasan/report_generic.c:356
hlist_move_list include/linux/list.h:1014 [inline]
collect_expired_timers kernel/time/timer.c:1625 [inline]
__run_timers+0x340/0x9f0 kernel/time/timer.c:1861
run_timer_softirq+0x6a/0xf0 kernel/time/timer.c:1888
handle_softirqs+0x1d7/0x600 kernel/softirq.c:642
__do_softirq kernel/softirq.c:680 [inline]
invoke_softirq kernel/softirq.c:497 [inline]
__irq_exit_rcu+0x52/0xf0 kernel/softirq.c:729
irq_exit_rcu+0x9/0x10 kernel/softirq.c:741
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
sysvec_apic_timer_interrupt+0xa9/0xc0 arch/x86/kernel/apic/apic.c:1118
asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:queued_spin_trylock include/asm-generic/qspinlock.h:98 [inline]
RIP: 0010:do_raw_spin_trylock include/linux/spinlock.h:193 [inline]
RIP: 0010:__raw_spin_trylock include/linux/spinlock_api_smp.h:89 [inline]
RIP: 0010:_raw_spin_trylock+0xc9/0x150 kernel/locking/spinlock.c:138
Code: df be 04 00 00 00 e8 26 12 b5 fc 4c 89 f7 be 04 00 00 00 e8 19 12 b5 fc 8b 44 24 20 b9 01 00 00 00 ba 01 00 00 00 f0 0f b1 13 <43> c6 44 3c 04 f8 74 17 bf 01 00 00 00 e8 d5 a3 4a fc 65 8b 05 a6
RSP: 0018:ffffc90010896e40 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff8881f6f3c840 RCX: 0000000000000001
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffc90010896e60
RBP: ffffc90010896ed0 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52002112dcc R12: 1ffff92002112dc8
R13: dffffc0000000000 R14: ffffc90010896e60 R15: dffffc0000000000
spin_trylock include/linux/spinlock.h:361 [inline]
rmqueue_pcplist mm/page_alloc.c:4062 [inline]
rmqueue mm/page_alloc.c:4111 [inline]
get_page_from_freelist+0x4e8/0x2d80 mm/page_alloc.c:4582
__alloc_pages+0x1fa/0x610 mm/page_alloc.c:5926
__folio_alloc+0x12/0x40 mm/page_alloc.c:5959
__folio_alloc_node include/linux/gfp.h:245 [inline]
folio_alloc include/linux/gfp.h:274 [inline]
shmem_alloc_folio mm/shmem.c:1597 [inline]
shmem_alloc_and_acct_folio+0x6dd/0x8c0 mm/shmem.c:1622
shmem_get_folio_gfp+0x119f/0x2230 mm/shmem.c:1951
shmem_fault+0x1ab/0x670 mm/shmem.c:2166
__do_fault mm/memory.c:4376 [inline]
do_read_fault mm/memory.c:4751 [inline]
do_fault+0x1b52/0x1ee0 mm/memory.c:4887
handle_pte_fault mm/memory.c:5183 [inline]
__handle_mm_fault mm/memory.c:5325 [inline]
handle_mm_fault+0x133a/0x26c0 mm/memory.c:5465
faultin_page mm/gup.c:1026 [inline]
__get_user_pages+0x34b/0xdb0 mm/gup.c:1250
populate_vma_page_range mm/gup.c:1607 [inline]
__mm_populate+0x2ea/0x430 mm/gup.c:1721
mm_populate include/linux/mm.h:3148 [inline]
vm_mmap_pgoff+0x293/0x410 mm/util.c:530
ksys_mmap_pgoff+0xf6/0x1d0 mm/mmap.c:1537
__do_sys_mmap arch/x86/kernel/sys_x86_64.c:93 [inline]
__se_sys_mmap arch/x86/kernel/sys_x86_64.c:86 [inline]
__x64_sys_mmap+0xfa/0x110 arch/x86/kernel/sys_x86_64.c:86
x64_sys_call+0x8fd/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:10
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f270a19cdd9
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:00007f270b0f0028 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f270a415fa0 RCX: 00007f270a19cdd9
RDX: b635773f06ebbeee RSI: 0000000000b36000 RDI: 0000200000000000
RBP: 00007f270a232d69 R08: ffffffffffffffff R09: 00000000ffffd000
R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f270a416038 R14: 00007f270a415fa0 R15: 00007ffea1296ef8
Allocated by task 608:
kasan_save_stack mm/kasan/common.c:46 [inline]
kasan_set_track+0x4b/0x70 mm/kasan/common.c:53
kasan_save_alloc_info+0x25/0x30 mm/kasan/generic.c:505
____kasan_kmalloc mm/kasan/common.c:380 [inline]
__kasan_kmalloc+0x95/0xb0 mm/kasan/common.c:389
kasan_kmalloc include/linux/kasan.h:212 [inline]
__do_kmalloc_node mm/slab_common.c:938 [inline]
__kmalloc+0xb1/0x1e0 mm/slab_common.c:951
kmalloc include/linux/slab.h:568 [inline]
kzalloc include/linux/slab.h:699 [inline]
hci_alloc_dev_priv+0x27/0x1bd0 net/bluetooth/hci_core.c:2433
hci_alloc_dev include/net/bluetooth/hci_core.h:1505 [inline]
hci_uart_register_dev drivers/bluetooth/hci_ldisc.c:641 [inline]
hci_uart_set_proto drivers/bluetooth/hci_ldisc.c:719 [inline]
hci_uart_tty_ioctl+0x3c8/0xa20 drivers/bluetooth/hci_ldisc.c:774
tty_ioctl+0x8ef/0xc60 drivers/tty/tty_io.c:2785
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl+0x12f/0x1b0 fs/ioctl.c:856
__x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:856
x64_sys_call+0x58b/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:17
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
Freed by task 608:
kasan_save_stack mm/kasan/common.c:46 [inline]
kasan_set_track+0x4b/0x70 mm/kasan/common.c:53
kasan_save_free_info+0x31/0x50 mm/kasan/generic.c:516
____kasan_slab_free+0x132/0x180 mm/kasan/common.c:242
__kasan_slab_free+0x11/0x20 mm/kasan/common.c:250
kasan_slab_free include/linux/kasan.h:178 [inline]
slab_free_hook mm/slub.c:1750 [inline]
slab_free_freelist_hook+0xc2/0x190 mm/slub.c:1776
slab_free mm/slub.c:3712 [inline]
__kmem_cache_free+0xb7/0x1b0 mm/slub.c:3728
kfree+0x6f/0xf0 mm/slab_common.c:990
hci_release_dev+0x12a3/0x13b0 net/bluetooth/hci_core.c:2761
bt_host_release+0x82/0x90 net/bluetooth/hci_sysfs.c:85
device_release+0xa4/0x1d0 drivers/base/core.c:-1
kobject_cleanup lib/kobject.c:681 [inline]
kobject_release lib/kobject.c:712 [inline]
kref_put include/linux/kref.h:65 [inline]
kobject_put+0x19d/0x280 lib/kobject.c:729
put_device+0x1f/0x30 drivers/base/core.c:3806
hci_dev_put include/net/bluetooth/hci_core.h:1465 [inline]
hci_dev_cmd+0x279/0x740 net/bluetooth/hci_core.c:795
hci_sock_ioctl+0x41e/0x7f0 net/bluetooth/hci_sock.c:1096
sock_do_ioctl+0x114/0x330 net/socket.c:1191
sock_ioctl+0x4bd/0x710 net/socket.c:1310
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl+0x12f/0x1b0 fs/ioctl.c:856
__x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:856
x64_sys_call+0x58b/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:17
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
Last potentially related work creation:
kasan_save_stack+0x3a/0x60 mm/kasan/common.c:46
__kasan_record_aux_stack+0xb6/0xc0 mm/kasan/generic.c:486
kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:496
insert_work+0x51/0x300 kernel/workqueue.c:1368
__queue_work+0x9b1/0xd30 kernel/workqueue.c:1527
queue_work_on+0xde/0x150 kernel/workqueue.c:1555
queue_work include/linux/workqueue.h:510 [inline]
hci_cmd_sync_run net/bluetooth/hci_sync.c:140 [inline]
__hci_cmd_sync_sk+0xa7f/0xd30 net/bluetooth/hci_sync.c:162
__hci_cmd_sync_status_sk net/bluetooth/hci_sync.c:253 [inline]
__hci_cmd_sync_status net/bluetooth/hci_sync.c:277 [inline]
hci_cmd_sync_status+0x53/0x120 net/bluetooth/hci_sync.c:288
hci_dev_cmd+0x648/0x740 net/bluetooth/hci_core.c:-1
hci_sock_ioctl+0x41e/0x7f0 net/bluetooth/hci_sock.c:1096
sock_do_ioctl+0x114/0x330 net/socket.c:1191
sock_ioctl+0x4bd/0x710 net/socket.c:1310
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl+0x12f/0x1b0 fs/ioctl.c:856
__x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:856
x64_sys_call+0x58b/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:17
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
Second to last potentially related work creation:
kasan_save_stack+0x3a/0x60 mm/kasan/common.c:46
__kasan_record_aux_stack+0xb6/0xc0 mm/kasan/generic.c:486
kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:496
insert_work+0x51/0x300 kernel/workqueue.c:1368
__queue_work+0x9b1/0xd30 kernel/workqueue.c:1527
queue_work_on+0xde/0x150 kernel/workqueue.c:1555
queue_work include/linux/workqueue.h:510 [inline]
hci_cmd_timeout+0x191/0x200 net/bluetooth/hci_core.c:1468
process_one_work+0x71f/0xc40 kernel/workqueue.c:2302
worker_thread+0xa29/0x11e0 kernel/workqueue.c:2449
kthread+0x281/0x320 kernel/kthread.c:386
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
The buggy address belongs to the object at ffff88811dad8000
which belongs to the cache kmalloc-8k of size 8192
The buggy address is located 2560 bytes inside of
8192-byte region [ffff88811dad8000, ffff88811dada000)
The buggy address belongs to the physical page:
page:ffffea000476b600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11dad8
head:ffffea000476b600 order:3 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head|zone=1)
raw: 4000000000010200 0000000000000000 dead000000000001 ffff888100043500
raw: 0000000000000000 0000000000020002 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0x52a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 138, tgid 138 (dhcpcd), ts 7003171141, free_ts 0
set_page_owner include/linux/page_owner.h:33 [inline]
post_alloc_hook+0x1f5/0x210 mm/page_alloc.c:2672
prep_new_page+0x1c/0x110 mm/page_alloc.c:2679
get_page_from_freelist+0x2d12/0x2d80 mm/page_alloc.c:4585
__alloc_pages+0x1fa/0x610 mm/page_alloc.c:5926
alloc_slab_page+0x6e/0xf0 include/linux/gfp.h:-1
allocate_slab mm/slub.c:1967 [inline]
new_slab+0x98/0x3d0 mm/slub.c:2020
___slab_alloc+0x6bd/0xb20 mm/slub.c:3177
__slab_alloc+0x5e/0xa0 mm/slub.c:3263
slab_alloc_node mm/slub.c:3348 [inline]
__kmem_cache_alloc_node+0x203/0x2c0 mm/slub.c:3423
kmalloc_trace+0x29/0xb0 mm/slab_common.c:1028
kmalloc include/linux/slab.h:563 [inline]
audit_log_d_path+0xc6/0x240 kernel/audit.c:2151
dump_common_audit_data security/lsm_audit.c:236 [inline]
common_lsm_audit+0x330/0x1730 security/lsm_audit.c:457
slow_avc_audit+0x1c4/0x240 security/selinux/avc.c:804
avc_audit security/selinux/include/avc.h:136 [inline]
avc_has_perm+0x1fb/0x250 security/selinux/avc.c:1201
inode_has_perm security/selinux/hooks.c:1638 [inline]
file_has_perm+0x52d/0x700 security/selinux/hooks.c:1730
match_file+0xc8/0x130 security/selinux/hooks.c:2401
page_owner free stack trace missing
Memory state around the buggy address:
ffff88811dad8900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88811dad8980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88811dad8a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88811dad8a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88811dad8b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 1 PID: 657 Comm: syz.2.99 Tainted: G B syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:__queue_work+0x575/0xd30 kernel/workqueue.c:-1
Code: 39 2b 0f 84 b9 00 00 00 e8 28 4e 29 00 4c 89 ff e8 10 df b9 03 49 bc 00 00 00 00 00 fc ff df 4c 8b 6d d0 4c 89 e8 48 c1 e8 03 <42> 80 3c 20 00 74 08 4c 89 ef e8 1c e8 6e 00 49 8b 7d 00 e8 a3 da
RSP: 0018:ffffc900001b0c70 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 000000007fffffff RCX: ffff88811f042880
RDX: 0000000000000100 RSI: 000000007fffffff RDI: 000000007fffffff
RBP: ffffc900001b0d08 R08: 0000000000000007 R09: fffffffffffffffb
R10: dffffc0000000000 R11: ffffed1023b5b139 R12: dffffc0000000000
R13: 0000000000000000 R14: ffff88811dad89c8 R15: 0000000000000008
FS: 00007f270b0f06c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1d77038000 CR3: 0000000112652000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
delayed_work_timer_fn+0x61/0x80 kernel/workqueue.c:1653
call_timer_fn+0x46/0x2a0 kernel/time/timer.c:1553
expire_timers kernel/time/timer.c:1599 [inline]
__run_timers+0x689/0x9f0 kernel/time/timer.c:1875
run_timer_softirq+0x6a/0xf0 kernel/time/timer.c:1888
handle_softirqs+0x1d7/0x600 kernel/softirq.c:642
__do_softirq kernel/softirq.c:680 [inline]
invoke_softirq kernel/softirq.c:497 [inline]
__irq_exit_rcu+0x52/0xf0 kernel/softirq.c:729
irq_exit_rcu+0x9/0x10 kernel/softirq.c:741
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
sysvec_apic_timer_interrupt+0xa9/0xc0 arch/x86/kernel/apic/apic.c:1118
asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:queued_spin_trylock include/asm-generic/qspinlock.h:98 [inline]
RIP: 0010:do_raw_spin_trylock include/linux/spinlock.h:193 [inline]
RIP: 0010:__raw_spin_trylock include/linux/spinlock_api_smp.h:89 [inline]
RIP: 0010:_raw_spin_trylock+0xc9/0x150 kernel/locking/spinlock.c:138
Code: df be 04 00 00 00 e8 26 12 b5 fc 4c 89 f7 be 04 00 00 00 e8 19 12 b5 fc 8b 44 24 20 b9 01 00 00 00 ba 01 00 00 00 f0 0f b1 13 <43> c6 44 3c 04 f8 74 17 bf 01 00 00 00 e8 d5 a3 4a fc 65 8b 05 a6
RSP: 0018:ffffc90010896e40 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff8881f6f3c840 RCX: 0000000000000001
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffc90010896e60
RBP: ffffc90010896ed0 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52002112dcc R12: 1ffff92002112dc8
R13: dffffc0000000000 R14: ffffc90010896e60 R15: dffffc0000000000
spin_trylock include/linux/spinlock.h:361 [inline]
rmqueue_pcplist mm/page_alloc.c:4062 [inline]
rmqueue mm/page_alloc.c:4111 [inline]
get_page_from_freelist+0x4e8/0x2d80 mm/page_alloc.c:4582
__alloc_pages+0x1fa/0x610 mm/page_alloc.c:5926
__folio_alloc+0x12/0x40 mm/page_alloc.c:5959
__folio_alloc_node include/linux/gfp.h:245 [inline]
folio_alloc include/linux/gfp.h:274 [inline]
shmem_alloc_folio mm/shmem.c:1597 [inline]
shmem_alloc_and_acct_folio+0x6dd/0x8c0 mm/shmem.c:1622
shmem_get_folio_gfp+0x119f/0x2230 mm/shmem.c:1951
shmem_fault+0x1ab/0x670 mm/shmem.c:2166
__do_fault mm/memory.c:4376 [inline]
do_read_fault mm/memory.c:4751 [inline]
do_fault+0x1b52/0x1ee0 mm/memory.c:4887
handle_pte_fault mm/memory.c:5183 [inline]
__handle_mm_fault mm/memory.c:5325 [inline]
handle_mm_fault+0x133a/0x26c0 mm/memory.c:5465
faultin_page mm/gup.c:1026 [inline]
__get_user_pages+0x34b/0xdb0 mm/gup.c:1250
populate_vma_page_range mm/gup.c:1607 [inline]
__mm_populate+0x2ea/0x430 mm/gup.c:1721
mm_populate include/linux/mm.h:3148 [inline]
vm_mmap_pgoff+0x293/0x410 mm/util.c:530
ksys_mmap_pgoff+0xf6/0x1d0 mm/mmap.c:1537
__do_sys_mmap arch/x86/kernel/sys_x86_64.c:93 [inline]
__se_sys_mmap arch/x86/kernel/sys_x86_64.c:86 [inline]
__x64_sys_mmap+0xfa/0x110 arch/x86/kernel/sys_x86_64.c:86
x64_sys_call+0x8fd/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:10
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f270a19cdd9
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:00007f270b0f0028 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f270a415fa0 RCX: 00007f270a19cdd9
RDX: b635773f06ebbeee RSI: 0000000000b36000 RDI: 0000200000000000
RBP: 00007f270a232d69 R08: ffffffffffffffff R09: 00000000ffffd000
R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f270a416038 R14: 00007f270a415fa0 R15: 00007ffea1296ef8
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__queue_work+0x575/0xd30 kernel/workqueue.c:-1
Code: 39 2b 0f 84 b9 00 00 00 e8 28 4e 29 00 4c 89 ff e8 10 df b9 03 49 bc 00 00 00 00 00 fc ff df 4c 8b 6d d0 4c 89 e8 48 c1 e8 03 <42> 80 3c 20 00 74 08 4c 89 ef e8 1c e8 6e 00 49 8b 7d 00 e8 a3 da
RSP: 0018:ffffc900001b0c70 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 000000007fffffff RCX: ffff88811f042880
RDX: 0000000000000100 RSI: 000000007fffffff RDI: 000000007fffffff
RBP: ffffc900001b0d08 R08: 0000000000000007 R09: fffffffffffffffb
R10: dffffc0000000000 R11: ffffed1023b5b139 R12: dffffc0000000000
R13: 0000000000000000 R14: ffff88811dad89c8 R15: 0000000000000008
FS: 00007f270b0f06c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1d77038000 CR3: 0000000112652000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: df be 04 00 00 00 fistpll 0x4(%rsi)
6: e8 26 12 b5 fc call 0xfcb51231
b: 4c 89 f7 mov %r14,%rdi
e: be 04 00 00 00 mov $0x4,%esi
13: e8 19 12 b5 fc call 0xfcb51231
18: 8b 44 24 20 mov 0x20(%rsp),%eax
1c: b9 01 00 00 00 mov $0x1,%ecx
21: ba 01 00 00 00 mov $0x1,%edx
26: f0 0f b1 13 lock cmpxchg %edx,(%rbx)
* 2a: 43 c6 44 3c 04 f8 movb $0xf8,0x4(%r12,%r15,1) <-- trapping instruction
30: 74 17 je 0x49
32: bf 01 00 00 00 mov $0x1,%edi
37: e8 d5 a3 4a fc call 0xfc4aa411
3c: 65 gs
3d: 8b .byte 0x8b
3e: 05 .byte 0x5
3f: a6 cmpsb %es:(%rdi),%ds:(%rsi)