==================================================================
BUG: KASAN: use-after-free in rose_timer_expiry+0x470/0x490 net/rose/rose_timer.c:183
Read of size 2 at addr ffff8880566afc2a by task syz.3.2407/10631
CPU: 0 PID: 10631 Comm: syz.3.2407 Not tainted 6.1.148-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
dump_stack_lvl+0x168/0x22e lib/dump_stack.c:106
print_address_description mm/kasan/report.c:316 [inline]
print_report+0xa8/0x210 mm/kasan/report.c:420
kasan_report+0x10b/0x140 mm/kasan/report.c:524
rose_timer_expiry+0x470/0x490 net/rose/rose_timer.c:183
call_timer_fn+0x1a0/0x670 kernel/time/timer.c:1504
expire_timers kernel/time/timer.c:1549 [inline]
__run_timers+0x525/0x7c0 kernel/time/timer.c:1820
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1833
handle_softirqs+0x2a1/0x920 kernel/softirq.c:596
__do_softirq kernel/softirq.c:630 [inline]
invoke_softirq kernel/softirq.c:470 [inline]
__irq_exit_rcu+0x12f/0x220 kernel/softirq.c:679
irq_exit_rcu+0x5/0x20 kernel/softirq.c:691
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:memset_erms+0xb/0x10 arch/x86/lib/memset_64.S:65
Code: 03 40 0f b6 f6 48 b8 01 01 01 01 01 01 01 01 48 0f af c6 f3 48 ab 89 d1 f3 aa 4c 89 c8 c3 90 49 89 f9 40 88 f0 48 89 d1 f3 aa <4c> 89 c8 c3 90 49 89 fa 40 0f b6 ce 48 b8 01 01 01 01 01 01 01 01
RSP: 0018:ffffc9000368f848 EFLAGS: 00000202
RAX: 0000000000000000 RBX: ffffc9000368f928 RCX: 0000000000000000
RDX: 0000000000000010 RSI: 0000000000000000 RDI: ffffc9000368f988
RBP: ffffffff8ec9a4f6 R08: dffffc0000000000 R09: ffffc9000368f978
R10: fffff520006d1f31 R11: 1ffff920006d1f2f R12: 1ffff920006d1f26
R13: dffffc0000000000 R14: ffffc9000368f978 R15: ffffc9000368f95d
unwind_next_frame+0xb8a/0x20b0 arch/x86/kernel/unwind_orc.c:546
arch_stack_walk+0x10c/0x140 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x98/0xe0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
____kasan_kmalloc mm/kasan/common.c:374 [inline]
__kasan_kmalloc+0x8e/0xa0 mm/kasan/common.c:383
kmalloc include/linux/slab.h:563 [inline]
kzalloc include/linux/slab.h:699 [inline]
apparmor_sk_alloc_security+0x74/0x100 security/apparmor/lsm.c:812
security_sk_alloc+0x6a/0xa0 security/security.c:2331
sk_prot_alloc+0x101/0x210 net/core/sock.c:2053
sk_alloc+0x36/0x340 net/core/sock.c:2103
inet6_create+0x7ef/0x1240 net/ipv6/af_inet6.c:192
__sock_create+0x4a2/0x940 net/socket.c:1550
sock_create net/socket.c:1606 [inline]
__sys_socket_create net/socket.c:1643 [inline]
__sys_socket+0xc4/0x190 net/socket.c:1671
__do_sys_socket net/socket.c:1684 [inline]
__se_sys_socket net/socket.c:1682 [inline]
__x64_sys_socket+0x76/0x80 net/socket.c:1682
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f8deb98ebe9
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:00007f8dec7d9038 EFLAGS: 00000246 ORIG_RAX: 0000000000000029
RAX: ffffffffffffffda RBX: 00007f8debbb5fa0 RCX: 00007f8deb98ebe9
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 000000000000000a
RBP: 00007f8deba11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8debbb6038 R14: 00007f8debbb5fa0 R15: 00007ffd9819cfc8
Allocated by task 9969:
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
____kasan_kmalloc mm/kasan/common.c:374 [inline]
__kasan_kmalloc+0x8e/0xa0 mm/kasan/common.c:383
kasan_kmalloc include/linux/kasan.h:211 [inline]
__do_kmalloc_node mm/slab_common.c:936 [inline]
__kmalloc_node_track_caller+0xae/0x230 mm/slab_common.c:956
kmalloc_reserve net/core/skbuff.c:446 [inline]
__alloc_skb+0x22a/0x7e0 net/core/skbuff.c:515
skb_copy+0x139/0x790 net/core/skbuff.c:1732
mac80211_hwsim_tx_frame_no_nl+0xd6e/0x1330 drivers/net/wireless/mac80211_hwsim.c:1729
mac80211_hwsim_tx_frame+0x1b5/0x200 drivers/net/wireless/mac80211_hwsim.c:2058
mac80211_hwsim_beacon_tx+0x61e/0xae0 drivers/net/wireless/mac80211_hwsim.c:2121
__iterate_interfaces+0x243/0x500 net/mac80211/util.c:788
ieee80211_iterate_active_interfaces_atomic+0xd7/0x170 net/mac80211/util.c:824
mac80211_hwsim_beacon+0xb7/0x1b0 drivers/net/wireless/mac80211_hwsim.c:2147
__run_hrtimer kernel/time/hrtimer.c:1752 [inline]
__hrtimer_run_queues+0x554/0xd60 kernel/time/hrtimer.c:1816
hrtimer_run_softirq+0x183/0x2a0 kernel/time/hrtimer.c:1833
handle_softirqs+0x2a1/0x920 kernel/softirq.c:596
__do_softirq kernel/softirq.c:630 [inline]
invoke_softirq kernel/softirq.c:470 [inline]
__irq_exit_rcu+0x12f/0x220 kernel/softirq.c:679
irq_exit_rcu+0x5/0x20 kernel/softirq.c:691
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
The buggy address belongs to the object at ffff8880566afc00
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 42 bytes inside of
512-byte region [ffff8880566afc00, ffff8880566afe00)
The buggy address belongs to the physical page:
page:ffffea000159ab00 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880566ae000 pfn:0x566ac
head:ffffea000159ab00 order:2 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 ffffea0000c08308 ffffea0001d0c308 ffff888017441c80
raw: ffff8880566ae000 0000000000100005 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 4264, tgid 4264 (syz-executor), ts 89062275466, free_ts 89052220483
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x173/0x1a0 mm/page_alloc.c:2532
prep_new_page mm/page_alloc.c:2539 [inline]
get_page_from_freelist+0x1a26/0x1ac0 mm/page_alloc.c:4328
__alloc_pages+0x1df/0x4e0 mm/page_alloc.c:5614
alloc_slab_page+0x5d/0x160 mm/slub.c:1794
allocate_slab mm/slub.c:1939 [inline]
new_slab+0x87/0x2c0 mm/slub.c:1992
___slab_alloc+0xbc6/0x1220 mm/slub.c:3180
__slab_alloc mm/slub.c:3279 [inline]
slab_alloc_node mm/slub.c:3364 [inline]
__kmem_cache_alloc_node+0x1a0/0x260 mm/slub.c:3437
__do_kmalloc_node mm/slab_common.c:935 [inline]
__kmalloc_node_track_caller+0x9e/0x230 mm/slab_common.c:956
kmalloc_reserve net/core/skbuff.c:446 [inline]
__alloc_skb+0x22a/0x7e0 net/core/skbuff.c:515
alloc_skb include/linux/skbuff.h:1271 [inline]
alloc_uevent_skb+0x7d/0x230 lib/kobject_uevent.c:290
uevent_net_broadcast_tagged lib/kobject_uevent.c:351 [inline]
kobject_uevent_net_broadcast+0x17e/0x530 lib/kobject_uevent.c:412
kobject_uevent_env+0x54c/0x8a0 lib/kobject_uevent.c:608
netdev_queue_add_kobject net/core/net-sysfs.c:1675 [inline]
netdev_queue_update_kobjects+0x23f/0x480 net/core/net-sysfs.c:1716
register_queue_kobjects net/core/net-sysfs.c:1777 [inline]
netdev_register_kobject+0x265/0x310 net/core/net-sysfs.c:2017
register_netdevice+0x12b9/0x1aa0 net/core/dev.c:10192
ipvlan_link_new+0x3a6/0xaa0 drivers/net/ipvlan/ipvlan_main.c:587
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1459 [inline]
free_pcp_prepare mm/page_alloc.c:1509 [inline]
free_unref_page_prepare+0x8b4/0x9a0 mm/page_alloc.c:3384
free_unref_page+0x2e/0x3f0 mm/page_alloc.c:3479
__stack_depot_save+0x435/0x460 lib/stackdepot.c:506
kasan_save_stack mm/kasan/common.c:46 [inline]
kasan_set_track+0x60/0x70 mm/kasan/common.c:52
__kasan_slab_alloc+0x6b/0x80 mm/kasan/common.c:328
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook+0x4b/0x480 mm/slab.h:737
slab_alloc_node mm/slub.c:3398 [inline]
slab_alloc mm/slub.c:3406 [inline]
__kmem_cache_alloc_lru mm/slub.c:3413 [inline]
kmem_cache_alloc+0x123/0x2f0 mm/slub.c:3422
kmem_cache_zalloc include/linux/slab.h:689 [inline]
fill_pool lib/debugobjects.c:169 [inline]
debug_objects_fill_pool+0x2ed/0x650 lib/debugobjects.c:607
__debug_object_init+0x29/0x420 lib/debugobjects.c:617
pm_runtime_init+0x178/0x3a0 drivers/base/power/runtime.c:1730
device_pm_init drivers/base/power/power.h:169 [inline]
device_initialize+0x247/0x450 drivers/base/core.c:3165
netdev_register_kobject+0x2f/0x310 net/core/net-sysfs.c:1995
register_netdevice+0x12b9/0x1aa0 net/core/dev.c:10192
ipvlan_link_new+0x3a6/0xaa0 drivers/net/ipvlan/ipvlan_main.c:587
rtnl_newlink_create net/core/rtnetlink.c:3422 [inline]
__rtnl_newlink net/core/rtnetlink.c:3642 [inline]
rtnl_newlink+0x14c4/0x1ff0 net/core/rtnetlink.c:3655
rtnetlink_rcv_msg+0x79b/0xed0 net/core/rtnetlink.c:6153
Memory state around the buggy address:
ffff8880566afb00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff8880566afb80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8880566afc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8880566afc80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880566afd00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
vkms_vblank_simulate: vblank timer overrun
----------------
Code disassembly (best guess):
0: 03 40 0f add 0xf(%rax),%eax
3: b6 f6 mov $0xf6,%dh
5: 48 b8 01 01 01 01 01 movabs $0x101010101010101,%rax
c: 01 01 01
f: 48 0f af c6 imul %rsi,%rax
13: f3 48 ab rep stos %rax,%es:(%rdi)
16: 89 d1 mov %edx,%ecx
18: f3 aa rep stos %al,%es:(%rdi)
1a: 4c 89 c8 mov %r9,%rax
1d: c3 ret
1e: 90 nop
1f: 49 89 f9 mov %rdi,%r9
22: 40 88 f0 mov %sil,%al
25: 48 89 d1 mov %rdx,%rcx
28: f3 aa rep stos %al,%es:(%rdi)
* 2a: 4c 89 c8 mov %r9,%rax <-- trapping instruction
2d: c3 ret
2e: 90 nop
2f: 49 89 fa mov %rdi,%r10
32: 40 0f b6 ce movzbl %sil,%ecx
36: 48 b8 01 01 01 01 01 movabs $0x101010101010101,%rax
3d: 01 01 01