==================================================================
BUG: KASAN: use-after-free in rose_timer_expiry+0x470/0x490 net/rose/rose_timer.c:183
Read of size 2 at addr ffff88806022c02a by task syz.6.2173/13018
CPU: 0 PID: 13018 Comm: syz.6.2173 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106
print_address_description+0x60/0x2d0 mm/kasan/report.c:248
__kasan_report mm/kasan/report.c:434 [inline]
kasan_report+0xdf/0x130 mm/kasan/report.c:451
rose_timer_expiry+0x470/0x490 net/rose/rose_timer.c:183
call_timer_fn+0x17b/0x540 kernel/time/timer.c:1648
expire_timers kernel/time/timer.c:1699 [inline]
__run_timers+0x53e/0x800 kernel/time/timer.c:1970
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1983
handle_softirqs+0x339/0x830 kernel/softirq.c:576
__do_softirq kernel/softirq.c:610 [inline]
invoke_softirq kernel/softirq.c:450 [inline]
__irq_exit_rcu+0x13b/0x230 kernel/softirq.c:659
irq_exit_rcu+0x5/0x20 kernel/softirq.c:671
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:lock_acquire+0x208/0x400 kernel/locking/lockdep.c:5627
Code: f7 84 24 80 00 00 00 00 02 00 00 43 c6 44 3d 04 f8 0f 85 f1 00 00 00 41 f7 c6 00 02 00 00 74 01 fb 48 c7 44 24 60 0e 36 e0 45 <4b> c7 44 3d 00 00 00 00 00 43 c7 44 3d 08 00 00 00 00 65 48 8b 04
RSP: 0018:ffffc90003457b40 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 5b3e3bbcbdf0c500
RDX: 0000000000000000 RSI: ffffffff8a2b3a20 RDI: ffffffff8a79f980
RBP: ffffc90003457c58 R08: dffffc0000000000 R09: 1ffffffff203a81e
R10: dffffc0000000000 R11: fffffbfff203a81f R12: ffff88807d77e328
R13: 1ffff9200068af74 R14: 0000000000000246 R15: dffffc0000000000
__might_fault+0xb3/0x110 mm/memory.c:5357
do_recvmmsg+0x3ab/0x850 net/socket.c:2806
__sys_recvmmsg net/socket.c:2879 [inline]
__do_sys_recvmmsg net/socket.c:2902 [inline]
__se_sys_recvmmsg net/socket.c:2895 [inline]
__x64_sys_recvmmsg+0x195/0x250 net/socket.c:2895
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f9272bb9819
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:00007f9270df2028 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007f9272e33090 RCX: 00007f9272bb9819
RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000003
RBP: 00007f9272c4fc91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9272e33128 R14: 00007f9272e33090 R15: 00007ffd92a12da8
Allocated by task 12691:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track mm/kasan/common.c:46 [inline]
set_alloc_info mm/kasan/common.c:434 [inline]
____kasan_kmalloc mm/kasan/common.c:513 [inline]
__kasan_kmalloc+0xb5/0xf0 mm/kasan/common.c:522
kmalloc_reserve net/core/skbuff.c:356 [inline]
__alloc_skb+0x22c/0x750 net/core/skbuff.c:427
__netdev_alloc_skb+0x110/0x4c0 net/core/skbuff.c:494
netdev_alloc_skb include/linux/skbuff.h:3024 [inline]
dev_alloc_skb include/linux/skbuff.h:3037 [inline]
__ieee80211_beacon_get+0xaa1/0x2000 net/mac80211/tx.c:5088
ieee80211_beacon_get_tim+0x48/0x840 net/mac80211/tx.c:5202
ieee80211_beacon_get include/net/mac80211.h:4983 [inline]
mac80211_hwsim_beacon_tx+0xf4/0x920 drivers/net/wireless/mac80211_hwsim.c:1812
__iterate_interfaces+0x243/0x500 net/mac80211/util.c:793
ieee80211_iterate_active_interfaces_atomic+0xb3/0x140 net/mac80211/util.c:829
mac80211_hwsim_beacon+0x9b/0x180 drivers/net/wireless/mac80211_hwsim.c:1865
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x4f2/0xb70 kernel/time/hrtimer.c:1749
hrtimer_run_softirq+0x176/0x240 kernel/time/hrtimer.c:1766
handle_softirqs+0x339/0x830 kernel/softirq.c:576
__do_softirq kernel/softirq.c:610 [inline]
invoke_softirq kernel/softirq.c:450 [inline]
__irq_exit_rcu+0x13b/0x230 kernel/softirq.c:659
irq_exit_rcu+0x5/0x20 kernel/softirq.c:671
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
Last potentially related work creation:
kasan_save_stack+0x35/0x60 mm/kasan/common.c:38
kasan_record_aux_stack+0xb8/0x100 mm/kasan/generic.c:348
kvfree_call_rcu+0x105/0x7d0 kernel/rcu/tree.c:3600
hash_ipportip6_gc_do+0x7e8/0x910 net/netfilter/ipset/ip_set_hash_gen.h:-1
hash_ipportip6_gc+0x228/0x5b0 net/netfilter/ipset/ip_set_hash_gen.h:570
process_one_work+0x85f/0x1010 kernel/workqueue.c:2310
worker_thread+0xaa6/0x1290 kernel/workqueue.c:2457
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
The buggy address belongs to the object at ffff88806022c000
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 42 bytes inside of
512-byte region [ffff88806022c000, ffff88806022c200)
The buggy address belongs to the page:
page:ffffea0001808b00 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88806022d400 pfn:0x6022c
head:ffffea0001808b00 order:2 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 ffffea0001938808 ffffea00017ca708 ffff888016c41c80
raw: ffff88806022d400 0000000000100003 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 4186, ts 62839589726, free_ts 62838917323
prep_new_page mm/page_alloc.c:2426 [inline]
get_page_from_freelist+0x1bbd/0x1ca0 mm/page_alloc.c:4192
__alloc_pages+0x1ee/0x480 mm/page_alloc.c:5501
alloc_slab_page mm/slub.c:1780 [inline]
allocate_slab mm/slub.c:1917 [inline]
new_slab+0xc0/0x4b0 mm/slub.c:1980
___slab_alloc+0x80a/0xdd0 mm/slub.c:3013
__slab_alloc mm/slub.c:3100 [inline]
slab_alloc_node mm/slub.c:3191 [inline]
__kmalloc_node_track_caller+0x1fc/0x3a0 mm/slub.c:4963
kmalloc_reserve net/core/skbuff.c:356 [inline]
__alloc_skb+0x22c/0x750 net/core/skbuff.c:427
alloc_skb include/linux/skbuff.h:1162 [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+0x556/0x890 lib/kobject_uevent.c:608
netdev_queue_add_kobject net/core/net-sysfs.c:1677 [inline]
netdev_queue_update_kobjects+0x1d7/0x3e0 net/core/net-sysfs.c:1711
register_queue_kobjects net/core/net-sysfs.c:1772 [inline]
netdev_register_kobject+0x273/0x320 net/core/net-sysfs.c:2018
register_netdevice+0x1042/0x1710 net/core/dev.c:10423
macvlan_common_newlink+0x109a/0x1810 drivers/net/macvlan.c:1506
__rtnl_newlink net/core/rtnetlink.c:3526 [inline]
rtnl_newlink+0x1359/0x1a50 net/core/rtnetlink.c:3574
rtnetlink_rcv_msg+0x844/0xf30 net/core/rtnetlink.c:5684
netlink_rcv_skb+0x1f5/0x440 net/netlink/af_netlink.c:2507
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1340 [inline]
free_pcp_prepare mm/page_alloc.c:1391 [inline]
free_unref_page_prepare+0x637/0x6c0 mm/page_alloc.c:3317
free_unref_page+0x8f/0x2a0 mm/page_alloc.c:3396
stack_depot_save+0x418/0x440 lib/stackdepot.c:335
kasan_save_stack mm/kasan/common.c:40 [inline]
kasan_set_track mm/kasan/common.c:46 [inline]
set_alloc_info mm/kasan/common.c:434 [inline]
__kasan_slab_alloc+0xb3/0xd0 mm/kasan/common.c:467
kasan_slab_alloc include/linux/kasan.h:254 [inline]
slab_post_alloc_hook+0x4c/0x380 mm/slab.h:519
slab_alloc_node mm/slub.c:3225 [inline]
kmem_cache_alloc_node+0x12d/0x2d0 mm/slub.c:3261
__alloc_skb+0xf4/0x750 net/core/skbuff.c:415
alloc_skb include/linux/skbuff.h:1162 [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+0x556/0x890 lib/kobject_uevent.c:608
rx_queue_add_kobject net/core/net-sysfs.c:1070 [inline]
net_rx_queue_update_kobjects+0x221/0x490 net/core/net-sysfs.c:1110
register_queue_kobjects net/core/net-sysfs.c:1767 [inline]
netdev_register_kobject+0x231/0x320 net/core/net-sysfs.c:2018
register_netdevice+0x1042/0x1710 net/core/dev.c:10423
macvlan_common_newlink+0x109a/0x1810 drivers/net/macvlan.c:1506
__rtnl_newlink net/core/rtnetlink.c:3526 [inline]
rtnl_newlink+0x1359/0x1a50 net/core/rtnetlink.c:3574
rtnetlink_rcv_msg+0x844/0xf30 net/core/rtnetlink.c:5684
Memory state around the buggy address:
ffff88806022bf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88806022bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88806022c000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88806022c080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88806022c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
0: f7 84 24 80 00 00 00 testl $0x200,0x80(%rsp)
7: 00 02 00 00
b: 43 c6 44 3d 04 f8 movb $0xf8,0x4(%r13,%r15,1)
11: 0f 85 f1 00 00 00 jne 0x108
17: 41 f7 c6 00 02 00 00 test $0x200,%r14d
1e: 74 01 je 0x21
20: fb sti
21: 48 c7 44 24 60 0e 36 movq $0x45e0360e,0x60(%rsp)
28: e0 45
* 2a: 4b c7 44 3d 00 00 00 movq $0x0,0x0(%r13,%r15,1) <-- trapping instruction
31: 00 00
33: 43 c7 44 3d 08 00 00 movl $0x0,0x8(%r13,%r15,1)
3a: 00 00
3c: 65 gs
3d: 48 rex.W
3e: 8b .byte 0x8b
3f: 04 .byte 0x4