==================================================================
BUG: KASAN: slab-use-after-free in __bpf_trace_run kernel/trace/bpf_trace.c:2376 [inline]
BUG: KASAN: slab-use-after-free in bpf_trace_run1+0xcb/0x510 kernel/trace/bpf_trace.c:2430
Read of size 8 at addr ffff88802a17ad18 by task syz-executor.3/17772
CPU: 1 PID: 17772 Comm: syz-executor.3 Not tainted 6.8.0-syzkaller-05239-g476a5e929119 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2e0 lib/dump_stack.c:106
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
__bpf_trace_run kernel/trace/bpf_trace.c:2376 [inline]
bpf_trace_run1+0xcb/0x510 kernel/trace/bpf_trace.c:2430
__traceiter_workqueue_activate_work+0x71/0xc0 include/trace/events/workqueue.h:59
trace_workqueue_activate_work+0x161/0x1d0 include/trace/events/workqueue.h:59
__queue_work+0xc04/0xec0 kernel/workqueue.c:2399
queue_work_on+0x14f/0x250 kernel/workqueue.c:2435
wg_queue_enqueue_per_device_and_peer drivers/net/wireguard/queueing.h:176 [inline]
wg_packet_create_data drivers/net/wireguard/send.c:320 [inline]
wg_packet_send_staged_packets+0x11d6/0x1900 drivers/net/wireguard/send.c:388
call_timer_fn+0x17e/0x600 kernel/time/timer.c:1792
expire_timers kernel/time/timer.c:1843 [inline]
__run_timers kernel/time/timer.c:2408 [inline]
__run_timer_base+0x66a/0x8e0 kernel/time/timer.c:2419
run_timer_base kernel/time/timer.c:2428 [inline]
run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2438
__do_softirq+0x2bc/0x943 kernel/softirq.c:554
invoke_softirq kernel/softirq.c:428 [inline]
__irq_exit_rcu+0xf2/0x1c0 kernel/softirq.c:633
irq_exit_rcu+0x9/0x30 kernel/softirq.c:645
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:unwind_next_frame+0x8e0/0x2a00 arch/x86/kernel/unwind_orc.c:517
Code: 48 83 c5 10 e9 da 06 00 00 83 fd 04 0f 84 6c 01 00 00 83 fd 05 0f 85 ff 02 00 00 e8 0a 58 54 00 48 8b 44 24 58 42 80 3c 28 00 <74> 08 48 89 df e8 86 b2 b7 00 48 8b 33 48 8b 54 24 18 48 8d 5a 01
RSP: 0018:ffffc90003217588 EFLAGS: 00000246
RAX: 1ffff92000642ed3 RBX: ffffc90003217698 RCX: ffff888026b69e00
RDX: 0000000000000000 RSI: ffffffff8dfa0820 RDI: 0000000000000005
RBP: 0000000000000005 R08: 0000000000000005 R09: ffffffff8140972e
R10: 0000000000000008 R11: ffff888026b69e00 R12: ffffffff8f9fe34c
R13: dffffc0000000000 R14: ffffc900032176b0 R15: 1ffff92000642ecc
arch_stack_walk+0x151/0x1b0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
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:589
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:2121 [inline]
slab_free mm/slub.c:4299 [inline]
kmem_cache_free+0x102/0x2a0 mm/slub.c:4363
jbd2_free_handle include/linux/jbd2.h:1596 [inline]
jbd2_journal_stop+0x91c/0xdc0 fs/jbd2/transaction.c:1973
__ext4_journal_stop+0xfd/0x1a0 fs/ext4/ext4_jbd2.c:134
ext4_evict_inode+0xbf3/0xf30 fs/ext4/inode.c:304
evict+0x2a8/0x630 fs/inode.c:667
do_unlinkat+0x512/0x830 fs/namei.c:4407
__do_sys_unlink fs/namei.c:4448 [inline]
__se_sys_unlink fs/namei.c:4446 [inline]
__x64_sys_unlink+0x49/0x60 fs/namei.c:4446
do_syscall_64+0xfb/0x240
entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7f936347d557
Code: 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 57 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffdd38994c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f936347d557
RDX: 00007ffdd38994f0 RSI: 00007ffdd3899580 RDI: 00007ffdd3899580
RBP: 00007ffdd3899580 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000206 R12: 00007ffdd389a640
R13: 00007f93634c93b9 R14: 000000000008cf87 R15: 0000000000000005
Allocated by task 24025:
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+0x1d9/0x360 mm/slub.c:4012
kmalloc include/linux/slab.h:590 [inline]
kzalloc include/linux/slab.h:711 [inline]
bpf_raw_tp_link_attach+0x2a0/0x6e0 kernel/bpf/syscall.c:3816
bpf_raw_tracepoint_open+0x1c2/0x240 kernel/bpf/syscall.c:3863
__sys_bpf+0x3c0/0x810 kernel/bpf/syscall.c:5673
__do_sys_bpf kernel/bpf/syscall.c:5738 [inline]
__se_sys_bpf kernel/bpf/syscall.c:5736 [inline]
__x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5736
do_syscall_64+0xfb/0x240
entry_SYSCALL_64_after_hwframe+0x6d/0x75
Freed by task 24026:
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:589
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:2121 [inline]
slab_free mm/slub.c:4299 [inline]
kfree+0x14a/0x380 mm/slub.c:4409
bpf_link_release+0x3b/0x50 kernel/bpf/syscall.c:3071
__fput+0x429/0x8a0 fs/file_table.c:423
task_work_run+0x24f/0x310 kernel/task_work.c:180
exit_task_work include/linux/task_work.h:38 [inline]
do_exit+0xa1b/0x27e0 kernel/exit.c:878
do_group_exit+0x207/0x2c0 kernel/exit.c:1027
get_signal+0x176e/0x1850 kernel/signal.c:2907
arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop kernel/entry/common.c:105 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:201 [inline]
syscall_exit_to_user_mode+0xc9/0x360 kernel/entry/common.c:212
do_syscall_64+0x10a/0x240 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x6d/0x75
The buggy address belongs to the object at ffff88802a17ad00
which belongs to the cache kmalloc-128 of size 128
The buggy address is located 24 bytes inside of
freed 128-byte region [ffff88802a17ad00, ffff88802a17ad80)
The buggy address belongs to the physical page:
page:ffffea0000a85e80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2a17a
ksm flags: 0xfff00000000800(slab|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000800 ffff888014c418c0 ffffea0000b2e9c0 dead000000000003
raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 4523, tgid 4523 (udevadm), ts 31658613092, free_ts 31655240338
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x1ea/0x210 mm/page_alloc.c:1533
prep_new_page mm/page_alloc.c:1540 [inline]
get_page_from_freelist+0x33ea/0x3580 mm/page_alloc.c:3311
__alloc_pages+0x256/0x680 mm/page_alloc.c:4569
__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:2190
allocate_slab mm/slub.c:2354 [inline]
new_slab+0x84/0x2f0 mm/slub.c:2407
___slab_alloc+0xd1b/0x13e0 mm/slub.c:3540
__slab_alloc mm/slub.c:3625 [inline]
__slab_alloc_node mm/slub.c:3678 [inline]
slab_alloc_node mm/slub.c:3850 [inline]
kmalloc_trace+0x267/0x360 mm/slub.c:4007
kmalloc include/linux/slab.h:590 [inline]
kzalloc include/linux/slab.h:711 [inline]
kernfs_get_open_node fs/kernfs/file.c:523 [inline]
kernfs_fop_open+0x803/0xcd0 fs/kernfs/file.c:691
do_dentry_open+0x907/0x15a0 fs/open.c:956
do_open fs/namei.c:3643 [inline]
path_openat+0x2860/0x3240 fs/namei.c:3800
do_filp_open+0x235/0x490 fs/namei.c:3827
do_sys_openat2+0x13e/0x1d0 fs/open.c:1407
do_sys_open fs/open.c:1422 [inline]
__do_sys_openat fs/open.c:1438 [inline]
__se_sys_openat fs/open.c:1433 [inline]
__x64_sys_openat+0x247/0x2a0 fs/open.c:1433
do_syscall_64+0xfb/0x240
entry_SYSCALL_64_after_hwframe+0x6d/0x75
page last free pid 4523 tgid 4523 stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1140 [inline]
free_unref_page_prepare+0x968/0xa90 mm/page_alloc.c:2346
free_unref_page+0x37/0x3f0 mm/page_alloc.c:2486
discard_slab mm/slub.c:2453 [inline]
__put_partials+0xeb/0x130 mm/slub.c:2922
put_cpu_partial+0x17c/0x250 mm/slub.c:2997
__slab_free+0x302/0x410 mm/slub.c:4166
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:3813 [inline]
slab_alloc_node mm/slub.c:3860 [inline]
kmem_cache_alloc+0x172/0x350 mm/slub.c:3867
skb_clone+0x20c/0x390 net/core/skbuff.c:2063
do_one_broadcast net/netlink/af_netlink.c:1466 [inline]
netlink_broadcast_filtered+0x707/0x1290 net/netlink/af_netlink.c:1544
netlink_broadcast+0x39/0x50 net/netlink/af_netlink.c:1568
uevent_net_broadcast_untagged lib/kobject_uevent.c:331 [inline]
kobject_uevent_net_broadcast+0x381/0x570 lib/kobject_uevent.c:409
kobject_uevent_env+0x586/0x8f0 lib/kobject_uevent.c:593
kobject_synth_uevent+0x4ef/0xae0 lib/kobject_uevent.c:208
store_uevent+0x25/0x50 kernel/module/main.c:916
Memory state around the buggy address:
ffff88802a17ac00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88802a17ac80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88802a17ad00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88802a17ad80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88802a17ae00: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc
==================================================================
----------------
Code disassembly (best guess):
0: 48 83 c5 10 add $0x10,%rbp
4: e9 da 06 00 00 jmp 0x6e3
9: 83 fd 04 cmp $0x4,%ebp
c: 0f 84 6c 01 00 00 je 0x17e
12: 83 fd 05 cmp $0x5,%ebp
15: 0f 85 ff 02 00 00 jne 0x31a
1b: e8 0a 58 54 00 call 0x54582a
20: 48 8b 44 24 58 mov 0x58(%rsp),%rax
25: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1)
* 2a: 74 08 je 0x34 <-- trapping instruction
2c: 48 89 df mov %rbx,%rdi
2f: e8 86 b2 b7 00 call 0xb7b2ba
34: 48 8b 33 mov (%rbx),%rsi
37: 48 8b 54 24 18 mov 0x18(%rsp),%rdx
3c: 48 8d 5a 01 lea 0x1(%rdx),%rbx