==================================================================
BUG: KASAN: use-after-free in rose_timer_expiry+0x470/0x490 net/rose/rose_timer.c:183
Read of size 2 at addr ffff8880556b782a by task syz.0.696/7929
CPU: 0 PID: 7929 Comm: syz.0.696 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:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xa5/0x100 kernel/locking/spinlock.c:194
Code: 74 05 e8 fe b0 66 f7 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f6 44 24 21 02 75 4b f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 86 3c 37 f7 65 8b 05 d7 05 e2 75 85 c0 74 3c 48 c7 04 24 0e 36
RSP: 0018:ffffc9000c98f5a0 EFLAGS: 00000206
RAX: 66604c7c6e515c00 RBX: 0000000000000a06 RCX: 66604c7c6e515c00
RDX: dffffc0000000000 RSI: ffffffff8a8c0420 RDI: 0000000000000001
RBP: ffffc9000c98f630 R08: dffffc0000000000 R09: fffffbfff215bc5d
R10: fffffbfff215bc5d R11: 1ffffffff215bc5c R12: dffffc0000000000
R13: 0000000000000000 R14: ffff888023f9dec0 R15: 1ffff92001931eb4
spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
__wake_up_common_lock kernel/sched/wait.c:140 [inline]
__wake_up_sync_key+0x11b/0x180 kernel/sched/wait.c:208
__unix_dgram_recvmsg+0x498/0xd70 net/unix/af_unix.c:2478
____sys_recvmsg+0x292/0x580 net/socket.c:-1
___sys_recvmsg+0x1b2/0x510 net/socket.c:2780
do_recvmmsg+0x359/0x7d0 net/socket.c:2874
__sys_recvmmsg net/socket.c:2953 [inline]
__do_sys_recvmmsg net/socket.c:2976 [inline]
__se_sys_recvmmsg net/socket.c:2969 [inline]
__x64_sys_recvmmsg+0x18d/0x240 net/socket.c:2969
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: 0033:0x7f652598ebe9
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:00007f65267ff038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007f6525bb6090 RCX: 00007f652598ebe9
RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000005
RBP: 00007f6525a11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6525bb6128 R14: 00007f6525bb6090 R15: 00007ffccaeace68
Allocated by task 7728:
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
__netdev_alloc_skb+0x107/0x4d0 net/core/skbuff.c:579
netdev_alloc_skb include/linux/skbuff.h:3229 [inline]
dev_alloc_skb include/linux/skbuff.h:3242 [inline]
__ieee80211_beacon_get+0xc48/0x1f50 net/mac80211/tx.c:5270
ieee80211_beacon_get_tim+0x5b/0x4d0 net/mac80211/tx.c:5352
ieee80211_beacon_get include/net/mac80211.h:5262 [inline]
mac80211_hwsim_beacon_tx+0x21c/0xae0 drivers/net/wireless/mac80211_hwsim.c:2091
__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
Last potentially related work creation:
kasan_save_stack+0x3a/0x60 mm/kasan/common.c:45
__kasan_record_aux_stack+0xb2/0xc0 mm/kasan/generic.c:486
call_rcu+0x154/0x980 kernel/rcu/tree.c:2849
fib6_info_release include/net/ip6_fib.h:340 [inline]
fib6_del_route net/ipv6/ip6_fib.c:2005 [inline]
fib6_del+0x10b9/0x14e0 net/ipv6/ip6_fib.c:2038
fib6_clean_node+0x296/0x580 net/ipv6/ip6_fib.c:2200
fib6_walk_continue+0x640/0x8c0 net/ipv6/ip6_fib.c:2122
fib6_walk+0x149/0x290 net/ipv6/ip6_fib.c:2170
fib6_clean_tree net/ipv6/ip6_fib.c:2250 [inline]
__fib6_clean_all+0x231/0x370 net/ipv6/ip6_fib.c:2266
rt6_sync_down_dev net/ipv6/route.c:4944 [inline]
rt6_disable_ip+0x120/0x7f0 net/ipv6/route.c:4949
addrconf_ifdown+0x162/0x1a10 net/ipv6/addrconf.c:3799
addrconf_notify+0x405/0xf40 net/ipv6/addrconf.c:-1
notifier_call_chain kernel/notifier.c:87 [inline]
raw_notifier_call_chain+0xcb/0x160 kernel/notifier.c:455
call_netdevice_notifiers_mtu net/core/dev.c:2076 [inline]
dev_set_mtu_ext+0x432/0x610 net/core/dev.c:8768
dev_set_mtu+0x41/0xc0 net/core/dev.c:8789
macvlan_device_event+0x2bf/0x7e0 drivers/net/macvlan.c:1776
notifier_call_chain kernel/notifier.c:87 [inline]
raw_notifier_call_chain+0xcb/0x160 kernel/notifier.c:455
call_netdevice_notifiers_mtu net/core/dev.c:2076 [inline]
dev_set_mtu_ext+0x432/0x610 net/core/dev.c:8768
dev_set_mtu+0x41/0xc0 net/core/dev.c:8789
dev_ifsioc+0x490/0xe90 net/core/dev_ioctl.c:334
dev_ioctl+0x578/0xea0 net/core/dev_ioctl.c:588
sock_do_ioctl+0x222/0x2f0 net/socket.c:1218
sock_ioctl+0x4ed/0x6e0 net/socket.c:1321
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl+0xfa/0x170 fs/ioctl.c:856
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
The buggy address belongs to the object at ffff8880556b7800
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 42 bytes inside of
512-byte region [ffff8880556b7800, ffff8880556b7a00)
The buggy address belongs to the physical page:
page:ffffea000155ad00 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880556b5c00 pfn:0x556b4
head:ffffea000155ad00 order:2 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 ffffea0000ab2c08 ffffea0001e6e008 ffff888017441c80
raw: ffff8880556b5c00 0000000000100004 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 0xd28c0(GFP_NOWAIT|__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 4263, tgid 4263 (syz-executor), ts 64194372260, free_ts 13387498659
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]
pskb_expand_head+0x1a6/0x12a0 net/core/skbuff.c:1848
netlink_trim+0x180/0x220 net/netlink/af_netlink.c:1299
netlink_broadcast+0x75/0x10d0 net/netlink/af_netlink.c:1500
nlmsg_multicast include/net/netlink.h:1071 [inline]
nlmsg_notify+0xe7/0x1a0 net/netlink/af_netlink.c:2554
fib_table_insert+0xd5d/0x1b50 net/ipv4/fib_trie.c:1385
fib_magic+0x2c1/0x390 net/ipv4/fib_frontend.c:1118
fib_add_ifaddr+0x389/0x5e0 net/ipv4/fib_frontend.c:1155
fib_netdev_event+0x361/0x470 net/ipv4/fib_frontend.c:1500
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
free_contig_range+0x9d/0x150 mm/page_alloc.c:9574
destroy_args+0xef/0x8bf mm/debug_vm_pgtable.c:1031
debug_vm_pgtable+0x32a/0x37e mm/debug_vm_pgtable.c:1354
do_one_initcall+0x214/0x7a0 init/main.c:1298
do_initcall_level+0x137/0x1e4 init/main.c:1371
do_initcalls+0x4b/0x8a init/main.c:1387
kernel_init_freeable+0x3fa/0x5ac init/main.c:1626
kernel_init+0x19/0x1b0 init/main.c:1514
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Memory state around the buggy address:
ffff8880556b7700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff8880556b7780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8880556b7800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8880556b7880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880556b7900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
0: 74 05 je 0x7
2: e8 fe b0 66 f7 call 0xf766b105
7: 48 c7 44 24 20 00 00 movq $0x0,0x20(%rsp)
e: 00 00
10: 9c pushf
11: 8f 44 24 20 pop 0x20(%rsp)
15: f6 44 24 21 02 testb $0x2,0x21(%rsp)
1a: 75 4b jne 0x67
1c: f7 c3 00 02 00 00 test $0x200,%ebx
22: 74 01 je 0x25
24: fb sti
25: bf 01 00 00 00 mov $0x1,%edi
* 2a: e8 86 3c 37 f7 call 0xf7373cb5 <-- trapping instruction
2f: 65 8b 05 d7 05 e2 75 mov %gs:0x75e205d7(%rip),%eax # 0x75e2060d
36: 85 c0 test %eax,%eax
38: 74 3c je 0x76
3a: 48 rex.W
3b: c7 .byte 0xc7
3c: 04 24 add $0x24,%al
3e: 0e (bad)
3f: 36 ss