==================================================================
BUG: KASAN: slab-use-after-free in rose_timer_expiry+0x31a/0x360 net/rose/rose_timer.c:174
Read of size 2 at addr ffff8880514b602a by task kworker/u9:2/19346
CPU: 0 PID: 19346 Comm: kworker/u9:2 Not tainted 6.9.0-rc7-syzkaller-01813-gb9d5f5711dd8 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Workqueue: hci13 hci_rx_work
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
print_address_description mm/kasan/report.c:377 [inline]
print_report+0x169/0x550 mm/kasan/report.c:488
kasan_report+0x143/0x180 mm/kasan/report.c:601
rose_timer_expiry+0x31a/0x360 net/rose/rose_timer.c:174
call_timer_fn+0x18e/0x650 kernel/time/timer.c:1793
expire_timers kernel/time/timer.c:1844 [inline]
__run_timers kernel/time/timer.c:2418 [inline]
__run_timer_base+0x66a/0x8e0 kernel/time/timer.c:2429
run_timer_base kernel/time/timer.c:2438 [inline]
run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2448
handle_softirqs+0x2d6/0x990 kernel/softirq.c:554
__do_softirq kernel/softirq.c:588 [inline]
invoke_softirq kernel/softirq.c:428 [inline]
__irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637
irq_exit_rcu+0x9/0x30 kernel/softirq.c:649
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:console_flush_all+0xaad/0xfd0 kernel/printk/printk.c:2985
Code: ff ff e8 a6 94 1f 00 90 0f 0b 90 e9 d8 f8 ff ff e8 98 94 1f 00 e8 13 a0 0c 0a 4d 85 f6 74 b6 e8 89 94 1f 00 fb 48 8b 44 24 70 <42> 0f b6 04 38 84 c0 48 8b 7c 24 30 0f 85 22 02 00 00 0f b6 1f 31
RSP: 0018:ffffc9000a687340 EFLAGS: 00000283
RAX: 1ffff920014d0eb4 RBX: 0000000000000000 RCX: 0000000000040000
RDX: ffffc900126d6000 RSI: 0000000000002524 RDI: 0000000000002525
RBP: ffffc9000a6874f0 R08: ffffffff81768d54 R09: 1ffffffff25e8ca0
R10: dffffc0000000000 R11: fffffbfff25e8ca1 R12: ffffffff8eb16778
R13: ffffffff8eb16720 R14: 0000000000000200 R15: dffffc0000000000
console_unlock+0x13b/0x4d0 kernel/printk/printk.c:3048
vprintk_emit+0x5a6/0x770 kernel/printk/printk.c:2348
_printk+0xd5/0x120 kernel/printk/printk.c:2373
bt_warn+0x127/0x180 net/bluetooth/lib.c:276
hci_cc_func net/bluetooth/hci_event.c:4238 [inline]
hci_cmd_complete_evt+0x44c/0x910 net/bluetooth/hci_event.c:4262
hci_event_func net/bluetooth/hci_event.c:7544 [inline]
hci_event_packet+0xa53/0x1540 net/bluetooth/hci_event.c:7599
hci_rx_work+0x3e8/0xca0 net/bluetooth/hci_core.c:4170
process_one_work kernel/workqueue.c:3267 [inline]
process_scheduled_works+0xa10/0x17c0 kernel/workqueue.c:3348
worker_thread+0x86d/0xd70 kernel/workqueue.c:3429
kthread+0x2f0/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Allocated by task 2819:
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:370 [inline]
__kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:387
kasan_kmalloc include/linux/kasan.h:211 [inline]
kmalloc_trace+0x1db/0x370 mm/slub.c:4003
kmalloc include/linux/slab.h:628 [inline]
batadv_forw_packet_alloc+0x19c/0x3b0 net/batman-adv/send.c:519
batadv_iv_ogm_aggregate_new net/batman-adv/bat_iv_ogm.c:562 [inline]
batadv_iv_ogm_queue_add+0x6da/0xbf0 net/batman-adv/bat_iv_ogm.c:670
batadv_iv_ogm_schedule_buff net/batman-adv/bat_iv_ogm.c:833 [inline]
batadv_iv_ogm_schedule+0x85b/0x1090 net/batman-adv/bat_iv_ogm.c:868
batadv_iv_send_outstanding_bat_ogm_packet+0x6fe/0x810 net/batman-adv/bat_iv_ogm.c:1712
process_one_work kernel/workqueue.c:3267 [inline]
process_scheduled_works+0xa10/0x17c0 kernel/workqueue.c:3348
worker_thread+0x86d/0xd70 kernel/workqueue.c:3429
kthread+0x2f0/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Freed by task 18869:
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:579
poison_slab_object+0xa6/0xe0 mm/kasan/common.c:240
__kasan_slab_free+0x37/0x60 mm/kasan/common.c:256
kasan_slab_free include/linux/kasan.h:184 [inline]
slab_free_hook mm/slub.c:2111 [inline]
slab_free mm/slub.c:4286 [inline]
kfree+0x153/0x3b0 mm/slub.c:4396
process_one_work kernel/workqueue.c:3267 [inline]
process_scheduled_works+0xa10/0x17c0 kernel/workqueue.c:3348
worker_thread+0x86d/0xd70 kernel/workqueue.c:3429
kthread+0x2f0/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
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+0xac/0xc0 mm/kasan/generic.c:541
insert_work+0x3e/0x330 kernel/workqueue.c:2261
__queue_work+0xb00/0xef0 kernel/workqueue.c:2417
call_timer_fn+0x18e/0x650 kernel/time/timer.c:1793
expire_timers kernel/time/timer.c:1839 [inline]
__run_timers kernel/time/timer.c:2418 [inline]
__run_timer_base+0x695/0x8e0 kernel/time/timer.c:2429
run_timer_base kernel/time/timer.c:2438 [inline]
run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2448
handle_softirqs+0x2d6/0x990 kernel/softirq.c:554
__do_softirq kernel/softirq.c:588 [inline]
invoke_softirq kernel/softirq.c:428 [inline]
__irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637
irq_exit_rcu+0x9/0x30 kernel/softirq.c:649
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
The buggy address belongs to the object at ffff8880514b6000
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 42 bytes inside of
freed 512-byte region [ffff8880514b6000, ffff8880514b6200)
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x514b4
head: order:2 entire_mapcount:0 nr_pages_mapped:0 pincount:0
ksm flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000840 ffff888015041c80 ffffea000160ed00 dead000000000003
raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
head: 00fff00000000840 ffff888015041c80 ffffea000160ed00 dead000000000003
head: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
head: 00fff00000000002 ffffea0001452d01 dead000000000122 00000000ffffffff
head: 0000000400000000 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 0x152820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_HARDWALL), pid 12952, tgid 1132805872 (syz-executor.1), ts 12952, free_ts 391822974788
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1ea/0x210 mm/page_alloc.c:1534
prep_new_page mm/page_alloc.c:1541 [inline]
get_page_from_freelist+0x3410/0x35b0 mm/page_alloc.c:3317
__alloc_pages+0x256/0x6c0 mm/page_alloc.c:4575
__alloc_pages_node include/linux/gfp.h:238 [inline]
alloc_pages_node include/linux/gfp.h:261 [inline]
alloc_slab_page+0x5f/0x160 mm/slub.c:2180
allocate_slab mm/slub.c:2343 [inline]
new_slab+0x84/0x2f0 mm/slub.c:2396
___slab_alloc+0xc73/0x1260 mm/slub.c:3530
__slab_alloc mm/slub.c:3615 [inline]
__slab_alloc_node mm/slub.c:3668 [inline]
slab_alloc_node mm/slub.c:3841 [inline]
__do_kmalloc_node mm/slub.c:3971 [inline]
__kmalloc+0x2e5/0x4a0 mm/slub.c:3985
kmalloc include/linux/slab.h:632 [inline]
kzalloc include/linux/slab.h:749 [inline]
fib6_info_alloc+0x2e/0xf0 net/ipv6/ip6_fib.c:155
ip6_route_info_create+0x445/0x12b0 net/ipv6/route.c:3759
addrconf_f6i_alloc+0x3c2/0x7f0 net/ipv6/route.c:4583
fixup_permanent_addr net/ipv6/addrconf.c:3585 [inline]
addrconf_permanent_addr+0x2c8/0xc50 net/ipv6/addrconf.c:3624
addrconf_notify+0x9f5/0x1020 net/ipv6/addrconf.c:3696
notifier_call_chain+0x19f/0x3e0 kernel/notifier.c:93
__dev_notify_flags+0x207/0x400
dev_change_flags+0xf0/0x1a0 net/core/dev.c:8858
do_setlink+0xccd/0x41f0 net/core/rtnetlink.c:2900
page last free pid 9882 tgid 9882 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1141 [inline]
free_unref_page_prepare+0x986/0xab0 mm/page_alloc.c:2347
free_unref_page+0x37/0x3f0 mm/page_alloc.c:2487
discard_slab mm/slub.c:2442 [inline]
__put_partials+0xeb/0x130 mm/slub.c:2911
put_cpu_partial+0x17c/0x250 mm/slub.c:2986
__slab_free+0x2ea/0x3d0 mm/slub.c:4157
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x5e/0xc0 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:322
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook mm/slub.c:3804 [inline]
slab_alloc_node mm/slub.c:3851 [inline]
kmem_cache_alloc+0x174/0x350 mm/slub.c:3858
getname_flags+0xbd/0x4f0 fs/namei.c:139
getname fs/namei.c:218 [inline]
__do_sys_unlink fs/namei.c:4447 [inline]
__se_sys_unlink fs/namei.c:4445 [inline]
__x64_sys_unlink+0x3c/0x60 fs/namei.c:4445
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Memory state around the buggy address:
ffff8880514b5f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff8880514b5f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8880514b6000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8880514b6080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880514b6100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess), 2 bytes skipped:
0: e8 a6 94 1f 00 call 0x1f94ab
5: 90 nop
6: 0f 0b ud2
8: 90 nop
9: e9 d8 f8 ff ff jmp 0xfffff8e6
e: e8 98 94 1f 00 call 0x1f94ab
13: e8 13 a0 0c 0a call 0xa0ca02b
18: 4d 85 f6 test %r14,%r14
1b: 74 b6 je 0xffffffd3
1d: e8 89 94 1f 00 call 0x1f94ab
22: fb sti
23: 48 8b 44 24 70 mov 0x70(%rsp),%rax
* 28: 42 0f b6 04 38 movzbl (%rax,%r15,1),%eax <-- trapping instruction
2d: 84 c0 test %al,%al
2f: 48 8b 7c 24 30 mov 0x30(%rsp),%rdi
34: 0f 85 22 02 00 00 jne 0x25c
3a: 0f b6 1f movzbl (%rdi),%ebx
3d: 31 .byte 0x31