==================================================================
BUG: KASAN: slab-use-after-free in tasklet_action_common+0x318/0x3d0 kernel/softirq.c:954
Read of size 8 at addr ffff888052a8c158 by task kworker/0:3/5346
CPU: 0 UID: 0 PID: 5346 Comm: kworker/0:3 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/05/2026
Workqueue: events_power_efficient wg_ratelimiter_gc_entries
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:378 [inline]
print_report+0x13d/0x4b0 mm/kasan/report.c:482
kasan_report+0xdf/0x1c0 mm/kasan/report.c:595
tasklet_action_common+0x318/0x3d0 kernel/softirq.c:954
handle_softirqs+0x1e6/0x9d0 kernel/softirq.c:645
__do_softirq kernel/softirq.c:679 [inline]
invoke_softirq kernel/softirq.c:519 [inline]
__irq_exit_rcu+0x16a/0x210 kernel/softirq.c:758
irq_exit_rcu+0x9/0x30 kernel/softirq.c:775
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
sysvec_apic_timer_interrupt+0xa3/0xc0 arch/x86/kernel/apic/apic.c:1062
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:__raw_spin_lock include/linux/spinlock_api_smp.h:191 [inline]
RIP: 0010:_raw_spin_lock+0x31/0x40 kernel/locking/spinlock.c:173
Code: fb bf 01 00 00 00 e8 0e 2d 02 f6 ff 74 24 08 48 8d 7b 18 45 31 c9 31 c9 41 b8 01 00 00 00 31 d2 31 f6 e8 82 8d 12 f6 48 89 df <58> 5b e9 98 e5 12 f6 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90
RSP: 0018:ffffc9000250fbc8 EFLAGS: 00000296
RAX: 0000000000000000 RBX: ffffffff90025ec0 RCX: 0000000000000100
RDX: 0000000000000001 RSI: ffffffff8e36d9c6 RDI: ffffffff90025ec0
RBP: dffffc0000000000 R08: 000000000005a569 R09: 0000000000000791
R10: 0000000000000200 R11: 0000000000000000 R12: 0000003abfa640b8
R13: ffffffff90025d20 R14: 0000000000000000 R15: 0000000000000787
spin_lock include/linux/spinlock.h:347 [inline]
wg_ratelimiter_gc_entries+0x62/0x510 drivers/net/wireguard/ratelimiter.c:63
process_one_work+0xac7/0x1b10 kernel/workqueue.c:3396
process_scheduled_works kernel/workqueue.c:3479 [inline]
worker_thread+0x5ef/0xe50 kernel/workqueue.c:3560
kthread+0x373/0x450 kernel/kthread.c:436
ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Allocated by task 1551:
kasan_save_stack+0x30/0x50 mm/kasan/common.c:57
kasan_save_track+0x14/0x30 mm/kasan/common.c:78
poison_kmalloc_redzone mm/kasan/common.c:409 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:426
kasan_kmalloc include/linux/kasan.h:263 [inline]
__kmalloc_cache_noprof+0x2f8/0x6d0 mm/slub.c:5563
_kmalloc_noprof include/linux/slab.h:991 [inline]
_kzalloc_noprof include/linux/slab.h:1312 [inline]
ath9k_init_wmi+0x43/0x300 drivers/net/wireless/ath/ath9k/wmi.c:95
ath9k_htc_probe_device+0x203/0x1f80 drivers/net/wireless/ath/ath9k/htc_drv_init.c:956
ath9k_htc_hw_init+0x33/0x60 drivers/net/wireless/ath/ath9k/htc_hst.c:532
ath9k_hif_usb_firmware_cb+0x25c/0x510 drivers/net/wireless/ath/ath9k/hif_usb.c:1255
request_firmware_work_func+0x13f/0x440 drivers/base/firmware_loader/main.c:1164
process_one_work+0xac7/0x1b10 kernel/workqueue.c:3396
process_scheduled_works kernel/workqueue.c:3479 [inline]
worker_thread+0x5ef/0xe50 kernel/workqueue.c:3560
kthread+0x373/0x450 kernel/kthread.c:436
ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Freed by task 1551:
kasan_save_stack+0x30/0x50 mm/kasan/common.c:57
kasan_save_track+0x14/0x30 mm/kasan/common.c:78
kasan_save_free_info+0x3b/0x70 mm/kasan/generic.c:584
poison_slab_object mm/kasan/common.c:264 [inline]
__kasan_slab_free+0x5f/0x80 mm/kasan/common.c:296
kasan_slab_free include/linux/kasan.h:235 [inline]
slab_free_hook mm/slub.c:2748 [inline]
slab_free mm/slub.c:6508 [inline]
kfree+0x22b/0x6d0 mm/slub.c:6801
ath9k_htc_probe_device+0x293/0x1f80 drivers/net/wireless/ath/ath9k/htc_drv_init.c:978
ath9k_htc_hw_init+0x33/0x60 drivers/net/wireless/ath/ath9k/htc_hst.c:532
ath9k_hif_usb_firmware_cb+0x25c/0x510 drivers/net/wireless/ath/ath9k/hif_usb.c:1255
request_firmware_work_func+0x13f/0x440 drivers/base/firmware_loader/main.c:1164
process_one_work+0xac7/0x1b10 kernel/workqueue.c:3396
process_scheduled_works kernel/workqueue.c:3479 [inline]
worker_thread+0x5ef/0xe50 kernel/workqueue.c:3560
kthread+0x373/0x450 kernel/kthread.c:436
ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
The buggy address belongs to the object at ffff888052a8c000
which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 344 bytes inside of
freed 2048-byte region [ffff888052a8c000, ffff888052a8c800)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888052a8d000 pfn:0x52a88
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000240(workingset|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000240 ffff88801c034000 ffffea00014ab010 ffffea00014a9010
raw: ffff888052a8d000 0000000000080005 00000000f5000000 0000000000000000
head: 00fff00000000240 ffff88801c034000 ffffea00014ab010 ffffea00014a9010
head: ffff888052a8d000 0000000000080005 00000000f5000000 0000000000000000
head: 00fff00000000003 fffffffffffffe01 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd2820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5631, tgid 5631 (syz-executor), ts 99190718527
set_page_owner include/linux/page_owner.h:33 [inline]
post_alloc_hook+0xfd/0x120 mm/page_alloc.c:1871
prep_new_page mm/page_alloc.c:1879 [inline]
get_page_from_freelist+0x110d/0x35d0 mm/page_alloc.c:3943
__alloc_frozen_pages_noprof+0x2eb/0x3300 mm/page_alloc.c:5436
alloc_slab_page mm/slub.c:3347 [inline]
allocate_slab mm/slub.c:3462 [inline]
new_slab+0xa9/0x6e0 mm/slub.c:3513
refill_objects+0xe3/0x410 mm/slub.c:7417
refill_sheaf mm/slub.c:2885 [inline]
__pcs_replace_empty_main+0x35e/0x650 mm/slub.c:4774
alloc_from_pcs mm/slub.c:4850 [inline]
slab_alloc_node mm/slub.c:4984 [inline]
__do_kmalloc_node mm/slub.c:5413 [inline]
__kmalloc_node_track_caller_noprof+0x6a8/0x870 mm/slub.c:5545
kmalloc_reserve+0xe8/0x350 net/core/skbuff.c:637
pskb_expand_head+0x249/0x10e0 net/core/skbuff.c:2315
netlink_trim+0x22d/0x2f0 net/netlink/af_netlink.c:1319
netlink_broadcast_filtered+0x6d/0xf20 net/netlink/af_netlink.c:1537
nlmsg_multicast_filtered include/net/netlink.h:1165 [inline]
nlmsg_multicast include/net/netlink.h:1184 [inline]
nlmsg_notify+0xb1/0x290 net/netlink/af_netlink.c:2618
rtnl_notify net/core/rtnetlink.c:994 [inline]
rtmsg_ifinfo_send net/core/rtnetlink.c:4614 [inline]
rtmsg_ifinfo_event net/core/rtnetlink.c:4630 [inline]
rtmsg_ifinfo_event net/core/rtnetlink.c:4617 [inline]
rtmsg_ifinfo+0x177/0x1b0 net/core/rtnetlink.c:4636
__dev_notify_flags+0x362/0x4b0 net/core/dev.c:9892
netif_change_flags+0x108/0x160 net/core/dev.c:9925
do_setlink.isra.0+0x1ac4/0x3e60 net/core/rtnetlink.c:3271
page last free pid 1 tgid 1 ts 20362999661 stack trace:
reset_page_owner include/linux/page_owner.h:26 [inline]
__free_pages_prepare mm/page_alloc.c:1418 [inline]
free_pages_prepare+0x586/0xe00 mm/page_alloc.c:1463
__free_contig_range_common+0x14f/0x250 mm/page_alloc.c:7072
debug_vm_pgtable_free_huge_page mm/debug_vm_pgtable.c:980 [inline]
destroy_args+0xa8/0x7a0 mm/debug_vm_pgtable.c:993
debug_vm_pgtable+0x1d69/0x3490 mm/debug_vm_pgtable.c:1368
do_one_initcall+0x11c/0x6f0 init/main.c:1362
do_initcall_level init/main.c:1424 [inline]
do_initcalls init/main.c:1440 [inline]
do_basic_setup init/main.c:1460 [inline]
kernel_init_freeable+0x6ea/0x7b0 init/main.c:1675
kernel_init+0x21/0x1e0 init/main.c:1565
ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Memory state around the buggy address:
ffff888052a8c000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888052a8c080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888052a8c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888052a8c180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888052a8c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in instrument_atomic_read_write include/linux/instrumented.h:112 [inline]
BUG: KASAN: slab-use-after-free in test_and_set_bit include/asm-generic/bitops/instrumented-atomic.h:71 [inline]
BUG: KASAN: slab-use-after-free in tasklet_trylock include/linux/interrupt.h:742 [inline]
BUG: KASAN: slab-use-after-free in tasklet_action_common+0x11e/0x3d0 kernel/softirq.c:956
Write of size 8 at addr ffff888052a8c160 by task kworker/0:3/5346
CPU: 0 UID: 0 PID: 5346 Comm: kworker/0:3 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/05/2026
Workqueue: events_power_efficient wg_ratelimiter_gc_entries
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:378 [inline]
print_report+0x13d/0x4b0 mm/kasan/report.c:482
kasan_report+0xdf/0x1c0 mm/kasan/report.c:595
check_region_inline mm/kasan/generic.c:186 [inline]
kasan_check_range+0x10f/0x1e0 mm/kasan/generic.c:200
instrument_atomic_read_write include/linux/instrumented.h:112 [inline]
test_and_set_bit include/asm-generic/bitops/instrumented-atomic.h:71 [inline]
tasklet_trylock include/linux/interrupt.h:742 [inline]
tasklet_action_common+0x11e/0x3d0 kernel/softirq.c:956
handle_softirqs+0x1e6/0x9d0 kernel/softirq.c:645
__do_softirq kernel/softirq.c:679 [inline]
invoke_softirq kernel/softirq.c:519 [inline]
__irq_exit_rcu+0x16a/0x210 kernel/softirq.c:758
irq_exit_rcu+0x9/0x30 kernel/softirq.c:775
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
sysvec_apic_timer_interrupt+0xa3/0xc0 arch/x86/kernel/apic/apic.c:1062
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:__raw_spin_lock include/linux/spinlock_api_smp.h:191 [inline]
RIP: 0010:_raw_spin_lock+0x31/0x40 kernel/locking/spinlock.c:173
Code: fb bf 01 00 00 00 e8 0e 2d 02 f6 ff 74 24 08 48 8d 7b 18 45 31 c9 31 c9 41 b8 01 00 00 00 31 d2 31 f6 e8 82 8d 12 f6 48 89 df <58> 5b e9 98 e5 12 f6 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90
RSP: 0018:ffffc9000250fbc8 EFLAGS: 00000296
RAX: 0000000000000000 RBX: ffffffff90025ec0 RCX: 0000000000000100
RDX: 0000000000000001 RSI: ffffffff8e36d9c6 RDI: ffffffff90025ec0
RBP: dffffc0000000000 R08: 000000000005a569 R09: 0000000000000791
R10: 0000000000000200 R11: 0000000000000000 R12: 0000003abfa640b8
R13: ffffffff90025d20 R14: 0000000000000000 R15: 0000000000000787
spin_lock include/linux/spinlock.h:347 [inline]
wg_ratelimiter_gc_entries+0x62/0x510 drivers/net/wireguard/ratelimiter.c:63
process_one_work+0xac7/0x1b10 kernel/workqueue.c:3396
process_scheduled_works kernel/workqueue.c:3479 [inline]
worker_thread+0x5ef/0xe50 kernel/workqueue.c:3560
kthread+0x373/0x450 kernel/kthread.c:436
ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Allocated by task 1551:
kasan_save_stack+0x30/0x50 mm/kasan/common.c:57
kasan_save_track+0x14/0x30 mm/kasan/common.c:78
poison_kmalloc_redzone mm/kasan/common.c:409 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:426
kasan_kmalloc include/linux/kasan.h:263 [inline]
__kmalloc_cache_noprof+0x2f8/0x6d0 mm/slub.c:5563
_kmalloc_noprof include/linux/slab.h:991 [inline]
_kzalloc_noprof include/linux/slab.h:1312 [inline]
ath9k_init_wmi+0x43/0x300 drivers/net/wireless/ath/ath9k/wmi.c:95
ath9k_htc_probe_device+0x203/0x1f80 drivers/net/wireless/ath/ath9k/htc_drv_init.c:956
ath9k_htc_hw_init+0x33/0x60 drivers/net/wireless/ath/ath9k/htc_hst.c:532
ath9k_hif_usb_firmware_cb+0x25c/0x510 drivers/net/wireless/ath/ath9k/hif_usb.c:1255
request_firmware_work_func+0x13f/0x440 drivers/base/firmware_loader/main.c:1164
process_one_work+0xac7/0x1b10 kernel/workqueue.c:3396
process_scheduled_works kernel/workqueue.c:3479 [inline]
worker_thread+0x5ef/0xe50 kernel/workqueue.c:3560
kthread+0x373/0x450 kernel/kthread.c:436
ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Freed by task 1551:
kasan_save_stack+0x30/0x50 mm/kasan/common.c:57
kasan_save_track+0x14/0x30 mm/kasan/common.c:78
kasan_save_free_info+0x3b/0x70 mm/kasan/generic.c:584
poison_slab_object mm/kasan/common.c:264 [inline]
__kasan_slab_free+0x5f/0x80 mm/kasan/common.c:296
kasan_slab_free include/linux/kasan.h:235 [inline]
slab_free_hook mm/slub.c:2748 [inline]
slab_free mm/slub.c:6508 [inline]
kfree+0x22b/0x6d0 mm/slub.c:6801
ath9k_htc_probe_device+0x293/0x1f80 drivers/net/wireless/ath/ath9k/htc_drv_init.c:978
ath9k_htc_hw_init+0x33/0x60 drivers/net/wireless/ath/ath9k/htc_hst.c:532
ath9k_hif_usb_firmware_cb+0x25c/0x510 drivers/net/wireless/ath/ath9k/hif_usb.c:1255
request_firmware_work_func+0x13f/0x440 drivers/base/firmware_loader/main.c:1164
process_one_work+0xac7/0x1b10 kernel/workqueue.c:3396
process_scheduled_works kernel/workqueue.c:3479 [inline]
worker_thread+0x5ef/0xe50 kernel/workqueue.c:3560
kthread+0x373/0x450 kernel/kthread.c:436
ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
The buggy address belongs to the object at ffff888052a8c000
which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 352 bytes inside of
freed 2048-byte region [ffff888052a8c000, ffff888052a8c800)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888052a8d000 pfn:0x52a88
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000240(workingset|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000240 ffff88801c034000 ffffea00014ab010 ffffea00014a9010
raw: ffff888052a8d000 0000000000080005 00000000f5000000 0000000000000000
head: 00fff00000000240 ffff88801c034000 ffffea00014ab010 ffffea00014a9010
head: ffff888052a8d000 0000000000080005 00000000f5000000 0000000000000000
head: 00fff00000000003 fffffffffffffe01 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd2820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5631, tgid 5631 (syz-executor), ts 99190718527
set_page_owner include/linux/page_owner.h:33 [inline]
post_alloc_hook+0xfd/0x120 mm/page_alloc.c:1871
prep_new_page mm/page_alloc.c:1879 [inline]
get_page_from_freelist+0x110d/0x35d0 mm/page_alloc.c:3943
__alloc_frozen_pages_noprof+0x2eb/0x3300 mm/page_alloc.c:5436
alloc_slab_page mm/slub.c:3347 [inline]
allocate_slab mm/slub.c:3462 [inline]
new_slab+0xa9/0x6e0 mm/slub.c:3513
refill_objects+0xe3/0x410 mm/slub.c:7417
refill_sheaf mm/slub.c:2885 [inline]
__pcs_replace_empty_main+0x35e/0x650 mm/slub.c:4774
alloc_from_pcs mm/slub.c:4850 [inline]
slab_alloc_node mm/slub.c:4984 [inline]
__do_kmalloc_node mm/slub.c:5413 [inline]
__kmalloc_node_track_caller_noprof+0x6a8/0x870 mm/slub.c:5545
kmalloc_reserve+0xe8/0x350 net/core/skbuff.c:637
pskb_expand_head+0x249/0x10e0 net/core/skbuff.c:2315
netlink_trim+0x22d/0x2f0 net/netlink/af_netlink.c:1319
netlink_broadcast_filtered+0x6d/0xf20 net/netlink/af_netlink.c:1537
nlmsg_multicast_filtered include/net/netlink.h:1165 [inline]
nlmsg_multicast include/net/netlink.h:1184 [inline]
nlmsg_notify+0xb1/0x290 net/netlink/af_netlink.c:2618
rtnl_notify net/core/rtnetlink.c:994 [inline]
rtmsg_ifinfo_send net/core/rtnetlink.c:4614 [inline]
rtmsg_ifinfo_event net/core/rtnetlink.c:4630 [inline]
rtmsg_ifinfo_event net/core/rtnetlink.c:4617 [inline]
rtmsg_ifinfo+0x177/0x1b0 net/core/rtnetlink.c:4636
__dev_notify_flags+0x362/0x4b0 net/core/dev.c:9892
netif_change_flags+0x108/0x160 net/core/dev.c:9925
do_setlink.isra.0+0x1ac4/0x3e60 net/core/rtnetlink.c:3271
page last free pid 1 tgid 1 ts 20362999661 stack trace:
reset_page_owner include/linux/page_owner.h:26 [inline]
__free_pages_prepare mm/page_alloc.c:1418 [inline]
free_pages_prepare+0x586/0xe00 mm/page_alloc.c:1463
__free_contig_range_common+0x14f/0x250 mm/page_alloc.c:7072
debug_vm_pgtable_free_huge_page mm/debug_vm_pgtable.c:980 [inline]
destroy_args+0xa8/0x7a0 mm/debug_vm_pgtable.c:993
debug_vm_pgtable+0x1d69/0x3490 mm/debug_vm_pgtable.c:1368
do_one_initcall+0x11c/0x6f0 init/main.c:1362
do_initcall_level init/main.c:1424 [inline]
do_initcalls init/main.c:1440 [inline]
do_basic_setup init/main.c:1460 [inline]
kernel_init_freeable+0x6ea/0x7b0 init/main.c:1675
kernel_init+0x21/0x1e0 init/main.c:1565
ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Memory state around the buggy address:
ffff888052a8c000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888052a8c080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888052a8c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888052a8c180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888052a8c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
0: fb sti
1: bf 01 00 00 00 mov $0x1,%edi
6: e8 0e 2d 02 f6 call 0xf6022d19
b: ff 74 24 08 push 0x8(%rsp)
f: 48 8d 7b 18 lea 0x18(%rbx),%rdi
13: 45 31 c9 xor %r9d,%r9d
16: 31 c9 xor %ecx,%ecx
18: 41 b8 01 00 00 00 mov $0x1,%r8d
1e: 31 d2 xor %edx,%edx
20: 31 f6 xor %esi,%esi
22: e8 82 8d 12 f6 call 0xf6128da9
27: 48 89 df mov %rbx,%rdi
* 2a: 58 pop %rax <-- trapping instruction
2b: 5b pop %rbx
2c: e9 98 e5 12 f6 jmp 0xf612e5c9
31: 0f 1f 84 00 00 00 00 nopl 0x0(%rax,%rax,1)
38: 00
39: 90 nop
3a: 90 nop
3b: 90 nop
3c: 90 nop
3d: 90 nop
3e: 90 nop
3f: 90 nop