==================================================================
BUG: KASAN: slab-use-after-free in rose_timer_expiry+0x464/0x4a0 net/rose/rose_timer.c:183
Read of size 2 at addr ffff88807ebc982a by task swapper/1/0
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted 6.14.0-rc3-syzkaller-00607-g5d6ba5ab8582 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:408 [inline]
print_report+0x16e/0x5b0 mm/kasan/report.c:521
kasan_report+0x143/0x180 mm/kasan/report.c:634
rose_timer_expiry+0x464/0x4a0 net/rose/rose_timer.c:183
call_timer_fn+0x187/0x650 kernel/time/timer.c:1789
expire_timers kernel/time/timer.c:1840 [inline]
__run_timers kernel/time/timer.c:2414 [inline]
__run_timer_base+0x66a/0x8e0 kernel/time/timer.c:2426
run_timer_base kernel/time/timer.c:2435 [inline]
run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2445
handle_softirqs+0x2d4/0x9b0 kernel/softirq.c:561
__do_softirq kernel/softirq.c:595 [inline]
invoke_softirq kernel/softirq.c:435 [inline]
__irq_exit_rcu+0xf7/0x220 kernel/softirq.c:662
irq_exit_rcu+0x9/0x30 kernel/softirq.c:678
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:native_irq_disable arch/x86/include/asm/irqflags.h:37 [inline]
RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:92 [inline]
RIP: 0010:acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:112
Code: 90 90 90 90 90 90 90 90 90 65 48 8b 04 25 80 d6 03 00 48 f7 00 08 00 00 00 75 10 66 90 0f 00 2d 85 ef 81 00 f3 0f 1e fa fb f4 c3 cc cc cc cc 66 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90
RSP: 0018:ffffc900001a7d08 EFLAGS: 00000246
RAX: ffff88801de80000 RBX: ffff8880212bc064 RCX: 000000000006d911
RDX: 0000000000000001 RSI: ffff8880212bc000 RDI: ffff8880212bc064
RBP: 000000000003aab8 R08: ffff8880b873799b R09: 1ffff110170e6f33
R10: dffffc0000000000 R11: ffffffff8c089010 R12: ffff88801d727800
R13: 0000000000000001 R14: 0000000000000001 R15: ffffffff8f3377e0
acpi_idle_enter+0xe4/0x140 drivers/acpi/processor_idle.c:699
cpuidle_enter_state+0x109/0x470 drivers/cpuidle/cpuidle.c:268
cpuidle_enter+0x5d/0xa0 drivers/cpuidle/cpuidle.c:389
call_cpuidle kernel/sched/idle.c:155 [inline]
cpuidle_idle_call kernel/sched/idle.c:230 [inline]
do_idle+0x372/0x5c0 kernel/sched/idle.c:325
cpu_startup_entry+0x42/0x60 kernel/sched/idle.c:423
start_secondary+0x102/0x110 arch/x86/kernel/smpboot.c:315
common_startup_64+0x13e/0x147
Allocated by task 14730:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:394
kasan_kmalloc include/linux/kasan.h:260 [inline]
__kmalloc_cache_noprof+0x243/0x390 mm/slub.c:4325
kmalloc_noprof include/linux/slab.h:901 [inline]
kzalloc_noprof include/linux/slab.h:1037 [inline]
mca_alloc net/ipv6/mcast.c:884 [inline]
__ipv6_dev_mc_inc+0x431/0xac0 net/ipv6/mcast.c:975
ipv6_add_dev+0xe03/0x1220 net/ipv6/addrconf.c:468
addrconf_notify+0x6a7/0x1020 net/ipv6/addrconf.c:3646
notifier_call_chain+0x1a5/0x3f0 kernel/notifier.c:85
call_netdevice_notifiers_extack net/core/dev.c:2251 [inline]
call_netdevice_notifiers net/core/dev.c:2265 [inline]
register_netdevice+0x16b5/0x1b60 net/core/dev.c:10992
register_netdev+0x40/0x50 net/core/dev.c:11070
loopback_net_init+0x73/0x150 drivers/net/loopback.c:217
ops_init+0x349/0x5b0 net/core/net_namespace.c:138
setup_net+0x287/0x9e0 net/core/net_namespace.c:362
copy_net_ns+0x33f/0x570 net/core/net_namespace.c:516
create_new_namespaces+0x425/0x7b0 kernel/nsproxy.c:110
unshare_nsproxy_namespaces+0x124/0x180 kernel/nsproxy.c:228
ksys_unshare+0x57d/0xa70 kernel/fork.c:3342
__do_sys_unshare kernel/fork.c:3413 [inline]
__se_sys_unshare kernel/fork.c:3411 [inline]
__x64_sys_unshare+0x38/0x40 kernel/fork.c:3411
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 3518:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x59/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2353 [inline]
slab_free_freelist_hook mm/slub.c:2382 [inline]
slab_free_bulk mm/slub.c:4633 [inline]
kmem_cache_free_bulk+0x2d8/0x530 mm/slub.c:4997
kfree_bulk include/linux/slab.h:790 [inline]
kvfree_rcu_bulk+0xd3/0x1d0 mm/slab_common.c:1498
kvfree_rcu_drain_ready mm/slab_common.c:1682 [inline]
kfree_rcu_monitor+0x20a/0x2a0 mm/slab_common.c:1755
process_one_work kernel/workqueue.c:3236 [inline]
process_scheduled_works+0xabe/0x18e0 kernel/workqueue.c:3317
worker_thread+0x870/0xd30 kernel/workqueue.c:3398
kthread+0x7a9/0x920 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Last potentially related work creation:
kasan_save_stack+0x3f/0x60 mm/kasan/common.c:47
kasan_record_aux_stack+0xaa/0xc0 mm/kasan/generic.c:548
kvfree_call_rcu+0xa9/0x3e0 mm/slab_common.c:1947
ipv6_mc_destroy_dev+0x3b6/0x580 net/ipv6/mcast.c:2862
addrconf_ifdown+0x1619/0x1b00 net/ipv6/addrconf.c:3992
addrconf_notify+0x3cb/0x1020
notifier_call_chain+0x1a5/0x3f0 kernel/notifier.c:85
call_netdevice_notifiers_extack net/core/dev.c:2251 [inline]
call_netdevice_notifiers net/core/dev.c:2265 [inline]
unregister_netdevice_many_notify+0x1179/0x2070 net/core/dev.c:11911
unregister_netdevice_many net/core/dev.c:11975 [inline]
default_device_exit_batch+0x7ff/0x880 net/core/dev.c:12458
ops_exit_list net/core/net_namespace.c:177 [inline]
cleanup_net+0x8ad/0xd60 net/core/net_namespace.c:652
process_one_work kernel/workqueue.c:3236 [inline]
process_scheduled_works+0xabe/0x18e0 kernel/workqueue.c:3317
worker_thread+0x870/0xd30 kernel/workqueue.c:3398
kthread+0x7a9/0x920 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
The buggy address belongs to the object at ffff88807ebc9800
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 42 bytes inside of
freed 512-byte region [ffff88807ebc9800, ffff88807ebc9a00)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88807ebcb800 pfn:0x7ebc8
head: order:2 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 ffff88801b041c80 ffffea0001c01b10 ffffea00009e3510
raw: ffff88807ebcb800 000000000010000f 00000000f5000000 0000000000000000
head: 00fff00000000240 ffff88801b041c80 ffffea0001c01b10 ffffea00009e3510
head: ffff88807ebcb800 000000000010000f 00000000f5000000 0000000000000000
head: 00fff00000000002 ffffea0001faf201 ffffffffffffffff 0000000000000000
head: 0000000000000004 0000000000000000 00000000ffffffff 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 11, tgid 11 (kworker/u8:0), ts 65301328006, free_ts 65103735557
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1f4/0x240 mm/page_alloc.c:1551
prep_new_page mm/page_alloc.c:1559 [inline]
get_page_from_freelist+0x365c/0x37a0 mm/page_alloc.c:3477
__alloc_frozen_pages_noprof+0x292/0x710 mm/page_alloc.c:4739
alloc_pages_mpol+0x311/0x660 mm/mempolicy.c:2270
alloc_slab_page mm/slub.c:2423 [inline]
allocate_slab+0x8f/0x3a0 mm/slub.c:2587
new_slab mm/slub.c:2640 [inline]
___slab_alloc+0xc27/0x14a0 mm/slub.c:3826
__slab_alloc+0x58/0xa0 mm/slub.c:3916
__slab_alloc_node mm/slub.c:3991 [inline]
slab_alloc_node mm/slub.c:4152 [inline]
__kmalloc_cache_noprof+0x27b/0x390 mm/slub.c:4320
kmalloc_noprof include/linux/slab.h:901 [inline]
kzalloc_noprof include/linux/slab.h:1037 [inline]
mca_alloc net/ipv6/mcast.c:884 [inline]
__ipv6_dev_mc_inc+0x431/0xac0 net/ipv6/mcast.c:975
addrconf_join_solict net/ipv6/addrconf.c:2240 [inline]
addrconf_dad_begin net/ipv6/addrconf.c:4095 [inline]
addrconf_dad_work+0x44f/0x16a0 net/ipv6/addrconf.c:4223
process_one_work kernel/workqueue.c:3236 [inline]
process_scheduled_works+0xabe/0x18e0 kernel/workqueue.c:3317
worker_thread+0x870/0xd30 kernel/workqueue.c:3398
kthread+0x7a9/0x920 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
page last free pid 5835 tgid 5835 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1127 [inline]
free_frozen_pages+0xe0d/0x10e0 mm/page_alloc.c:2660
discard_slab mm/slub.c:2684 [inline]
__put_partials+0x160/0x1c0 mm/slub.c:3153
put_cpu_partial+0x17c/0x250 mm/slub.c:3228
__slab_free+0x290/0x380 mm/slub.c:4479
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4115 [inline]
slab_alloc_node mm/slub.c:4164 [inline]
__kmalloc_cache_noprof+0x1d9/0x390 mm/slub.c:4320
kmalloc_noprof include/linux/slab.h:901 [inline]
kzalloc_noprof include/linux/slab.h:1037 [inline]
ref_tracker_alloc+0x14b/0x490 lib/ref_tracker.c:203
__netdev_tracker_alloc include/linux/netdevice.h:4283 [inline]
netdev_tracker_alloc include/linux/netdevice.h:4295 [inline]
netdev_get_by_index+0x7a/0xb0 net/core/dev.c:991
fib6_nh_init+0x1d8/0x2180 net/ipv6/route.c:3548
ip6_route_info_create+0x999/0x12b0 net/ipv6/route.c:3814
ip6_route_add+0x28/0x160 net/ipv6/route.c:3858
addrconf_prefix_route net/ipv6/addrconf.c:2485 [inline]
inet6_addr_add+0x7ed/0xe30 net/ipv6/addrconf.c:3050
inet6_rtm_newaddr+0xa89/0xf10 net/ipv6/addrconf.c:5054
rtnetlink_rcv_msg+0x791/0xcf0 net/core/rtnetlink.c:6917
Memory state around the buggy address:
ffff88807ebc9700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88807ebc9780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88807ebc9800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88807ebc9880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88807ebc9900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
0: 90 nop
1: 90 nop
2: 90 nop
3: 90 nop
4: 90 nop
5: 90 nop
6: 90 nop
7: 90 nop
8: 90 nop
9: 65 48 8b 04 25 80 d6 mov %gs:0x3d680,%rax
10: 03 00
12: 48 f7 00 08 00 00 00 testq $0x8,(%rax)
19: 75 10 jne 0x2b
1b: 66 90 xchg %ax,%ax
1d: 0f 00 2d 85 ef 81 00 verw 0x81ef85(%rip) # 0x81efa9
24: f3 0f 1e fa endbr64
28: fb sti
29: f4 hlt
* 2a: fa cli <-- trapping instruction
2b: c3 ret
2c: cc int3
2d: cc int3
2e: cc int3
2f: cc int3
30: 66 0f 1f 84 00 00 00 nopw 0x0(%rax,%rax,1)
37: 00 00
39: 90 nop
3a: 90 nop
3b: 90 nop
3c: 90 nop
3d: 90 nop
3e: 90 nop
3f: 90 nop