==================================================================
BUG: KASAN: use-after-free in rose_timer_expiry+0x470/0x490 net/rose/rose_timer.c:183
Read of size 2 at addr ffff88805a9d842a by task udevd/10645
CPU: 1 PID: 10645 Comm: udevd Not tainted 6.1.137-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
Call Trace:
dump_stack_lvl+0x168/0x22e lib/dump_stack.c:106
print_address_description mm/kasan/report.c:316 [inline]
print_report+0xa8/0x220 mm/kasan/report.c:427
kasan_report+0x10b/0x140 mm/kasan/report.c:531
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:578
__do_softirq kernel/softirq.c:612 [inline]
invoke_softirq kernel/softirq.c:452 [inline]
__irq_exit_rcu+0x12f/0x220 kernel/softirq.c:661
irq_exit_rcu+0x5/0x20 kernel/softirq.c:673
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:is_bpf_text_address+0x0/0x2a0 kernel/bpf/core.c:732
Code: e8 a5 7a de ff 48 c7 c7 60 a9 92 8c 48 8b 74 24 20 e8 74 17 d6 ff 4c 89 f0 48 83 c4 28 5b 41 5c 41 5d 41 5e 41 5f 5d c3 66 90 <55> 41 57 41 56 41 55 41 54 53 48 83 ec 10 49 89 fe e8 2a 83 f3 ff
RSP: 0018:ffffc90004eff2b0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 00007fde09990bf2 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8abf0d80 RDI: 00007fde09990bf2
RBP: 0000000000000001 R08: 0000000000000004 R09: 000000000000000c
R10: fffff520009dfe6d R11: 1ffff920009dfe6b R12: ffff888077f79dc0
R13: ffff888019a55500 R14: 0000000000000001 R15: 1ffff920009dfe6a
kernel_text_address+0x9c/0xd0 kernel/extable.c:125
__kernel_text_address+0x9/0x30 kernel/extable.c:79
unwind_get_return_address+0x49/0x80 arch/x86/kernel/unwind_orc.c:323
arch_stack_walk+0xf2/0x140 arch/x86/kernel/stacktrace.c:26
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_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]
kmem_cache_alloc_node+0x14d/0x320 mm/slub.c:3443
__alloc_skb+0xfc/0x7e0 net/core/skbuff.c:505
alloc_skb include/linux/skbuff.h:1271 [inline]
alloc_skb_with_frags+0xa7/0x710 net/core/skbuff.c:6162
sock_alloc_send_pskb+0x853/0x980 net/core/sock.c:2750
unix_dgram_sendmsg+0x57e/0x18d0 net/unix/af_unix.c:1918
sock_sendmsg_nosec net/socket.c:718 [inline]
__sock_sendmsg net/socket.c:730 [inline]
sock_write_iter+0x2b5/0x3a0 net/socket.c:1143
call_write_iter include/linux/fs.h:2265 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x44c/0x960 fs/read_write.c:584
ksys_write+0x143/0x240 fs/read_write.c:637
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: 0033:0x7fde09990bf2
Code: 89 c7 48 89 44 24 08 e8 7b 34 fa ff 48 8b 44 24 08 48 83 c4 28 c3 c3 64 8b 04 25 18 00 00 00 85 c0 75 20 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 6f 48 8b 15 07 a2 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffdb511ca48 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fde09990bf2
RDX: 0000000000000000 RSI: 00007ffdb511ca9f RDI: 000000000000000a
RBP: 00007ffdb511ca9f R08: 0000000000000001 R09: 0f988211b95b99a9
R10: 1999999999999999 R11: 0000000000000246 R12: 000000000000000a
R13: 00007fde098baae0 R14: 0000000000000000 R15: 000055f63170c910
Allocated by task 11265:
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
alloc_skb include/linux/skbuff.h:1271 [inline]
netlink_alloc_large_skb net/netlink/af_netlink.c:1183 [inline]
netlink_sendmsg+0x645/0xbc0 net/netlink/af_netlink.c:1834
sock_sendmsg_nosec net/socket.c:718 [inline]
__sock_sendmsg net/socket.c:730 [inline]
__sys_sendto+0x44f/0x5c0 net/socket.c:2153
__do_sys_sendto net/socket.c:2165 [inline]
__se_sys_sendto net/socket.c:2161 [inline]
__x64_sys_sendto+0xda/0xf0 net/socket.c:2161
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
Freed by task 11265:
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
kasan_save_free_info+0x2d/0x50 mm/kasan/generic.c:516
____kasan_slab_free+0x126/0x1e0 mm/kasan/common.c:236
kasan_slab_free include/linux/kasan.h:177 [inline]
slab_free_hook mm/slub.c:1724 [inline]
slab_free_freelist_hook+0x131/0x1a0 mm/slub.c:1750
slab_free mm/slub.c:3661 [inline]
__kmem_cache_free+0xb6/0x1f0 mm/slub.c:3674
skb_free_head net/core/skbuff.c:762 [inline]
skb_release_data+0x5db/0x7c0 net/core/skbuff.c:791
skb_release_all net/core/skbuff.c:856 [inline]
__kfree_skb net/core/skbuff.c:870 [inline]
consume_skb+0xa2/0x100 net/core/skbuff.c:1035
netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline]
netlink_unicast+0x754/0x8c0 net/netlink/af_netlink.c:1337
netlink_sendmsg+0x89e/0xbc0 net/netlink/af_netlink.c:1859
sock_sendmsg_nosec net/socket.c:718 [inline]
__sock_sendmsg net/socket.c:730 [inline]
__sys_sendto+0x44f/0x5c0 net/socket.c:2153
__do_sys_sendto net/socket.c:2165 [inline]
__se_sys_sendto net/socket.c:2161 [inline]
__x64_sys_sendto+0xda/0xf0 net/socket.c:2161
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
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+0x14b/0x970 kernel/rcu/tree.c:2845
fib6_info_release include/net/ip6_fib.h:340 [inline]
fib6_del_route net/ipv6/ip6_fib.c:1999 [inline]
fib6_del+0x10b9/0x14e0 net/ipv6/ip6_fib.c:2032
fib6_clean_node+0x296/0x580 net/ipv6/ip6_fib.c:2194
fib6_walk_continue+0x640/0x8c0 net/ipv6/ip6_fib.c:2116
fib6_walk+0x149/0x290 net/ipv6/ip6_fib.c:2164
fib6_clean_tree net/ipv6/ip6_fib.c:2244 [inline]
__fib6_clean_all+0x231/0x370 net/ipv6/ip6_fib.c:2260
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:3801
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_extack net/core/dev.c:2039 [inline]
call_netdevice_notifiers net/core/dev.c:2053 [inline]
dev_close_many+0x28d/0x400 net/core/dev.c:1601
unregister_netdevice_many+0x471/0x1840 net/core/dev.c:10952
default_device_exit_batch+0x9c3/0xa50 net/core/dev.c:11491
ops_exit_list net/core/net_namespace.c:177 [inline]
cleanup_net+0x77b/0xb80 net/core/net_namespace.c:640
process_one_work+0x898/0x1160 kernel/workqueue.c:2292
worker_thread+0xaa2/0x1250 kernel/workqueue.c:2439
kthread+0x29d/0x330 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Second to 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
insert_work+0x54/0x3c0 kernel/workqueue.c:1361
__queue_work+0xba3/0xfb0 kernel/workqueue.c:1520
call_timer_fn+0x1a0/0x670 kernel/time/timer.c:1504
expire_timers kernel/time/timer.c:1544 [inline]
__run_timers+0x550/0x7c0 kernel/time/timer.c:1820
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1833
handle_softirqs+0x2a1/0x920 kernel/softirq.c:578
__do_softirq kernel/softirq.c:612 [inline]
invoke_softirq kernel/softirq.c:452 [inline]
__irq_exit_rcu+0x12f/0x220 kernel/softirq.c:661
irq_exit_rcu+0x5/0x20 kernel/softirq.c:673
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 ffff88805a9d8400
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 42 bytes inside of
512-byte region [ffff88805a9d8400, ffff88805a9d8600)
The buggy address belongs to the physical page:
page:ffffea00016a7600 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88805a9d8800 pfn:0x5a9d8
head:ffffea00016a7600 order:2 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 ffffea0001583008 ffffea0000a7a708 ffff888017441c80
raw: ffff88805a9d8800 000000000010000d 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 4266, tgid 4266 (syz-executor), ts 85630434702, free_ts 85593890191
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:5606
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
kmalloc_trace+0x26/0xe0 mm/slab_common.c:1026
kmalloc include/linux/slab.h:563 [inline]
kzalloc include/linux/slab.h:699 [inline]
device_private_init drivers/base/core.c:3541 [inline]
device_add+0xba/0xfb0 drivers/base/core.c:3591
netdev_register_kobject+0x176/0x310 net/core/net-sysfs.c:2013
register_netdevice+0x12b9/0x1aa0 net/core/dev.c:10192
vxcan_newlink+0x31d/0x5a0 drivers/net/can/vxcan.c:224
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
netlink_rcv_skb+0x1de/0x420 net/netlink/af_netlink.c:2493
netlink_unicast_kernel net/netlink/af_netlink.c:1311 [inline]
netlink_unicast+0x74c/0x8c0 net/netlink/af_netlink.c:1337
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+0x2ce/0x650 lib/debugobjects.c:607
__debug_object_init+0x29/0x420 lib/debugobjects.c:617
debug_timer_init kernel/time/timer.c:777 [inline]
debug_init kernel/time/timer.c:825 [inline]
init_timer_key+0x3e/0x320 kernel/time/timer.c:869
ipv6_mc_init_dev+0x10b/0x7c0 net/ipv6/mcast.c:2773
ipv6_add_dev+0xb57/0x1120 net/ipv6/addrconf.c:448
addrconf_notify+0x634/0xf40 net/ipv6/addrconf.c:3598
notifier_call_chain kernel/notifier.c:87 [inline]
raw_notifier_call_chain+0xcb/0x160 kernel/notifier.c:455
call_netdevice_notifiers_extack net/core/dev.c:2039 [inline]
call_netdevice_notifiers net/core/dev.c:2053 [inline]
register_netdevice+0x1600/0x1aa0 net/core/dev.c:10225
rtnl_newlink_create net/core/rtnetlink.c:3424 [inline]
__rtnl_newlink net/core/rtnetlink.c:3642 [inline]
rtnl_newlink+0x1687/0x1ff0 net/core/rtnetlink.c:3655
Memory state around the buggy address:
ffff88805a9d8300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88805a9d8380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88805a9d8400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88805a9d8480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88805a9d8500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
0: e8 a5 7a de ff call 0xffde7aaa
5: 48 c7 c7 60 a9 92 8c mov $0xffffffff8c92a960,%rdi
c: 48 8b 74 24 20 mov 0x20(%rsp),%rsi
11: e8 74 17 d6 ff call 0xffd6178a
16: 4c 89 f0 mov %r14,%rax
19: 48 83 c4 28 add $0x28,%rsp
1d: 5b pop %rbx
1e: 41 5c pop %r12
20: 41 5d pop %r13
22: 41 5e pop %r14
24: 41 5f pop %r15
26: 5d pop %rbp
27: c3 ret
28: 66 90 xchg %ax,%ax
* 2a: 55 push %rbp <-- trapping instruction
2b: 41 57 push %r15
2d: 41 56 push %r14
2f: 41 55 push %r13
31: 41 54 push %r12
33: 53 push %rbx
34: 48 83 ec 10 sub $0x10,%rsp
38: 49 89 fe mov %rdi,%r14
3b: e8 2a 83 f3 ff call 0xfff3836a