==================================================================
BUG: KASAN: use-after-free in cpu_map_generic_redirect+0x1a8/0x6d0 kernel/bpf/cpumap.c:786
Read of size 8 at addr ffff88812ad2a818 by task kworker/0:0/6
CPU: 0 PID: 6 Comm: kworker/0:0 Not tainted 5.15.176-syzkaller-00972-g829d9f138569 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Workqueue: wg-crypt-wg1 wg_packet_tx_worker
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x151/0x1c0 lib/dump_stack.c:106
print_address_description+0x87/0x3b0 mm/kasan/report.c:248
__kasan_report mm/kasan/report.c:427 [inline]
kasan_report+0x179/0x1c0 mm/kasan/report.c:444
__asan_report_load8_noabort+0x14/0x20 mm/kasan/report_generic.c:309
cpu_map_generic_redirect+0x1a8/0x6d0 kernel/bpf/cpumap.c:786
xdp_do_generic_redirect_map net/core/filter.c:4189 [inline]
xdp_do_generic_redirect+0x3df/0xb40 net/core/filter.c:4236
do_xdp_generic+0x50b/0x7c0 net/core/dev.c:4919
__netif_receive_skb_core+0x1706/0x3640 net/core/dev.c:5324
__netif_receive_skb_one_core net/core/dev.c:5499 [inline]
__netif_receive_skb+0x11c/0x530 net/core/dev.c:5615
process_backlog+0x31c/0x650 net/core/dev.c:6492
__napi_poll+0xc4/0x5a0 net/core/dev.c:7051
napi_poll net/core/dev.c:7118 [inline]
net_rx_action+0x47d/0xc50 net/core/dev.c:7208
handle_softirqs+0x25e/0x5c0 kernel/softirq.c:565
__do_softirq+0xb/0xd kernel/softirq.c:603
do_softirq+0xf6/0x150 kernel/softirq.c:452
__local_bh_enable_ip+0x75/0x80 kernel/softirq.c:379
__raw_read_unlock_bh include/linux/rwlock_api_smp.h:251 [inline]
_raw_read_unlock_bh+0x29/0x30 kernel/locking/spinlock.c:284
wg_socket_send_skb_to_peer+0x178/0x1d0 drivers/net/wireguard/socket.c:184
wg_packet_create_data_done drivers/net/wireguard/send.c:251 [inline]
wg_packet_tx_worker+0x1e6/0x530 drivers/net/wireguard/send.c:276
process_one_work+0x6bb/0xc10 kernel/workqueue.c:2325
worker_thread+0xad5/0x12a0 kernel/workqueue.c:2472
kthread+0x421/0x510 kernel/kthread.c:337
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
Allocated by task 2169:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track mm/kasan/common.c:45 [inline]
set_alloc_info mm/kasan/common.c:433 [inline]
____kasan_kmalloc+0xdb/0x110 mm/kasan/common.c:512
__kasan_kmalloc+0x9/0x10 mm/kasan/common.c:521
kasan_kmalloc include/linux/kasan.h:227 [inline]
__kmalloc+0x13f/0x2c0 mm/slub.c:4431
__kmalloc_node include/linux/slab.h:469 [inline]
kmalloc_node include/linux/slab.h:626 [inline]
bpf_map_kmalloc_node+0xdb/0x160 kernel/bpf/syscall.c:432
__cpu_map_entry_alloc kernel/bpf/cpumap.c:442 [inline]
cpu_map_update_elem+0x26c/0xea0 kernel/bpf/cpumap.c:600
bpf_map_update_value+0x1a3/0x3c0 kernel/bpf/syscall.c:186
map_update_elem+0x644/0x770 kernel/bpf/syscall.c:1165
__sys_bpf+0x405/0x760 kernel/bpf/syscall.c:4626
__do_sys_bpf kernel/bpf/syscall.c:4742 [inline]
__se_sys_bpf kernel/bpf/syscall.c:4740 [inline]
__x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:4740
x64_sys_call+0x87f/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:322
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
Freed by task 2170:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track+0x4b/0x70 mm/kasan/common.c:45
kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370
____kasan_slab_free+0x126/0x160 mm/kasan/common.c:365
__kasan_slab_free+0x11/0x20 mm/kasan/common.c:373
kasan_slab_free include/linux/kasan.h:193 [inline]
slab_free_hook mm/slub.c:1723 [inline]
slab_free_freelist_hook+0xbd/0x190 mm/slub.c:1749
slab_free mm/slub.c:3521 [inline]
kfree+0xcc/0x270 mm/slub.c:4583
put_cpu_map_entry+0x6dd/0x750 kernel/bpf/cpumap.c:160
cpu_map_kthread_run+0x22d0/0x2390 kernel/bpf/cpumap.c:407
kthread+0x421/0x510 kernel/kthread.c:337
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
Last potentially related work creation:
kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38
__kasan_record_aux_stack+0xd3/0xf0 mm/kasan/generic.c:348
kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358
insert_work+0x56/0x320 kernel/workqueue.c:1373
__queue_work+0x92a/0xcd0 kernel/workqueue.c:1539
queue_work_on+0x105/0x170 kernel/workqueue.c:1566
queue_work include/linux/workqueue.h:510 [inline]
schedule_work include/linux/workqueue.h:571 [inline]
__cpu_map_entry_replace kernel/bpf/cpumap.c:555 [inline]
cpu_map_free+0x1e7/0x2c0 kernel/bpf/cpumap.c:638
bpf_map_free_deferred+0x10d/0x1e0 kernel/bpf/syscall.c:481
process_one_work+0x6bb/0xc10 kernel/workqueue.c:2325
worker_thread+0xad5/0x12a0 kernel/workqueue.c:2472
kthread+0x421/0x510 kernel/kthread.c:337
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
Second to last potentially related work creation:
kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38
__kasan_record_aux_stack+0xd3/0xf0 mm/kasan/generic.c:348
kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358
__call_rcu_common kernel/rcu/tree.c:3007 [inline]
call_rcu+0x123/0x10b0 kernel/rcu/tree.c:3125
__cpu_map_entry_replace kernel/bpf/cpumap.c:553 [inline]
cpu_map_free+0x109/0x2c0 kernel/bpf/cpumap.c:638
bpf_map_free_deferred+0x10d/0x1e0 kernel/bpf/syscall.c:481
process_one_work+0x6bb/0xc10 kernel/workqueue.c:2325
worker_thread+0xad5/0x12a0 kernel/workqueue.c:2472
kthread+0x421/0x510 kernel/kthread.c:337
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
The buggy address belongs to the object at ffff88812ad2a800
which belongs to the cache kmalloc-192 of size 192
The buggy address is located 24 bytes inside of
192-byte region [ffff88812ad2a800, ffff88812ad2a8c0)
The buggy address belongs to the page:
page:ffffea0004ab4a80 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88812ad2a600 pfn:0x12ad2a
flags: 0x4000000000000200(slab|zone=1)
raw: 4000000000000200 ffffea00044cd308 ffffea00042a5f08 ffff888100042c00
raw: ffff88812ad2a600 000000000010000e 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 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 101, ts 39547335427, free_ts 39334380784
set_page_owner include/linux/page_owner.h:33 [inline]
post_alloc_hook+0x1a3/0x1b0 mm/page_alloc.c:2605
prep_new_page+0x1b/0x110 mm/page_alloc.c:2611
get_page_from_freelist+0x3550/0x35d0 mm/page_alloc.c:4485
__alloc_pages+0x27e/0x8f0 mm/page_alloc.c:5780
allocate_slab mm/slub.c:1932 [inline]
new_slab+0x9a/0x4e0 mm/slub.c:1995
___slab_alloc+0x39e/0x830 mm/slub.c:3028
__slab_alloc+0x4a/0x90 mm/slub.c:3115
slab_alloc_node mm/slub.c:3206 [inline]
slab_alloc mm/slub.c:3250 [inline]
kmem_cache_alloc_trace+0x147/0x270 mm/slub.c:3267
kmalloc include/linux/slab.h:603 [inline]
kzalloc include/linux/slab.h:733 [inline]
kernfs_fop_open+0x324/0xab0 fs/kernfs/file.c:628
do_dentry_open+0x81c/0xfd0 fs/open.c:828
vfs_open+0x73/0x80 fs/open.c:958
do_open fs/namei.c:3608 [inline]
path_openat+0x26f0/0x2f40 fs/namei.c:3742
do_filp_open+0x21c/0x460 fs/namei.c:3769
do_sys_openat2+0x13f/0x820 fs/open.c:1234
do_sys_open fs/open.c:1250 [inline]
__do_sys_openat fs/open.c:1266 [inline]
__se_sys_openat fs/open.c:1261 [inline]
__x64_sys_openat+0x243/0x290 fs/open.c:1261
x64_sys_call+0x6bf/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:258
page last free stack trace:
reset_page_owner include/linux/page_owner.h:26 [inline]
free_pages_prepare mm/page_alloc.c:1472 [inline]
free_pcp_prepare mm/page_alloc.c:1544 [inline]
free_unref_page_prepare+0x7c8/0x7d0 mm/page_alloc.c:3534
free_unref_page+0xe8/0x750 mm/page_alloc.c:3616
free_the_page mm/page_alloc.c:805 [inline]
__free_pages+0x61/0xf0 mm/page_alloc.c:5856
free_pages+0x7c/0x90 mm/page_alloc.c:5867
tlb_batch_list_free mm/mmu_gather.c:61 [inline]
tlb_finish_mmu+0x253/0x320 mm/mmu_gather.c:341
exit_mmap+0x484/0x990 mm/mmap.c:3236
__mmput+0x95/0x310 kernel/fork.c:1180
mmput+0x5b/0x170 kernel/fork.c:1203
exit_mm kernel/exit.c:554 [inline]
do_exit+0xb9c/0x2ca0 kernel/exit.c:867
do_group_exit+0x141/0x310 kernel/exit.c:1002
__do_sys_exit_group kernel/exit.c:1013 [inline]
__se_sys_exit_group kernel/exit.c:1011 [inline]
__x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1011
x64_sys_call+0x610/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
Memory state around the buggy address:
ffff88812ad2a700: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88812ad2a780: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
>ffff88812ad2a800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88812ad2a880: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
ffff88812ad2a900: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
================================================================================
UBSAN: array-index-out-of-bounds in kernel/locking/qspinlock.c:130:9
index 16382 is out of range for type 'unsigned long[8]'
CPU: 0 PID: 6 Comm: kworker/0:0 Tainted: G B 5.15.176-syzkaller-00972-g829d9f138569 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Workqueue: wg-crypt-wg1 wg_packet_tx_worker
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x151/0x1c0 lib/dump_stack.c:106
dump_stack+0x15/0x20 lib/dump_stack.c:113
ubsan_epilogue lib/ubsan.c:151 [inline]
__ubsan_handle_out_of_bounds+0x118/0x140 lib/ubsan.c:282
decode_tail kernel/locking/qspinlock.c:130 [inline]
__pv_queued_spin_lock_slowpath+0xb9d/0xc40 kernel/locking/qspinlock.c:468
pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:585 [inline]
queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:51 [inline]
queued_spin_lock include/asm-generic/qspinlock.h:85 [inline]
do_raw_spin_lock include/linux/spinlock.h:187 [inline]
__raw_spin_lock include/linux/spinlock_api_smp.h:143 [inline]
_raw_spin_lock+0x139/0x1b0 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:363 [inline]
ptr_ring_produce include/linux/ptr_ring.h:128 [inline]
cpu_map_generic_redirect+0x1d5/0x6d0 kernel/bpf/cpumap.c:786
xdp_do_generic_redirect_map net/core/filter.c:4189 [inline]
xdp_do_generic_redirect+0x3df/0xb40 net/core/filter.c:4236
do_xdp_generic+0x50b/0x7c0 net/core/dev.c:4919
__netif_receive_skb_core+0x1706/0x3640 net/core/dev.c:5324
__netif_receive_skb_one_core net/core/dev.c:5499 [inline]
__netif_receive_skb+0x11c/0x530 net/core/dev.c:5615
process_backlog+0x31c/0x650 net/core/dev.c:6492
__napi_poll+0xc4/0x5a0 net/core/dev.c:7051
napi_poll net/core/dev.c:7118 [inline]
net_rx_action+0x47d/0xc50 net/core/dev.c:7208
handle_softirqs+0x25e/0x5c0 kernel/softirq.c:565
__do_softirq+0xb/0xd kernel/softirq.c:603
do_softirq+0xf6/0x150 kernel/softirq.c:452
__local_bh_enable_ip+0x75/0x80 kernel/softirq.c:379
__raw_read_unlock_bh include/linux/rwlock_api_smp.h:251 [inline]
_raw_read_unlock_bh+0x29/0x30 kernel/locking/spinlock.c:284
wg_socket_send_skb_to_peer+0x178/0x1d0 drivers/net/wireguard/socket.c:184
wg_packet_create_data_done drivers/net/wireguard/send.c:251 [inline]
wg_packet_tx_worker+0x1e6/0x530 drivers/net/wireguard/send.c:276
process_one_work+0x6bb/0xc10 kernel/workqueue.c:2325
worker_thread+0xad5/0x12a0 kernel/workqueue.c:2472
kthread+0x421/0x510 kernel/kthread.c:337
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
================================================================================
general protection fault, probably for non-canonical address 0xe010f4fb9f81ff65: 0000 [#1] PREEMPT SMP KASAN
KASAN: maybe wild-memory-access in range [0x0087c7dcfc0ffb28-0x0087c7dcfc0ffb2f]
CPU: 0 PID: 6 Comm: kworker/0:0 Tainted: G B 5.15.176-syzkaller-00972-g829d9f138569 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Workqueue: wg-crypt-wg1 wg_packet_tx_worker
RIP: 0010:__pv_queued_spin_lock_slowpath+0x2f3/0xc40 kernel/locking/qspinlock.c:471
Code: 74 1e 48 89 4c 24 10 48 8b 7c 24 10 e8 86 98 5d 00 48 8b 4c 24 10 48 ba 00 00 00 00 00 fc ff df 4c 03 21 4c 89 e0 48 c1 e8 03 <80> 3c 10 00 74 12 4c 89 e7 e8 ff 98 5d 00 48 ba 00 00 00 00 00 fc
RSP: 0018:ffffc900000075c0 EFLAGS: 00010206
RAX: 0010f8fb9f81ff65 RBX: ffff8881f7038ad4 RCX: ffffffff86285820
RDX: dffffc0000000000 RSI: 0000000000000002 RDI: 00000000ffffffff
RBP: ffffc900000076b0 R08: ffffffff8141a99b R09: 0000000000000003
R10: fffffbfff0e9a84c R11: dffffc0000000001 R12: 0087c7dcfc0ffb29
R13: 1ffff11022fc62a0 R14: 1ffff1103ee07159 R15: ffff888117e31504
FS: 0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe6fea41000 CR3: 0000000006a0f000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:585 [inline]
queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:51 [inline]
queued_spin_lock include/asm-generic/qspinlock.h:85 [inline]
do_raw_spin_lock include/linux/spinlock.h:187 [inline]
__raw_spin_lock include/linux/spinlock_api_smp.h:143 [inline]
_raw_spin_lock+0x139/0x1b0 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:363 [inline]
ptr_ring_produce include/linux/ptr_ring.h:128 [inline]
cpu_map_generic_redirect+0x1d5/0x6d0 kernel/bpf/cpumap.c:786
xdp_do_generic_redirect_map net/core/filter.c:4189 [inline]
xdp_do_generic_redirect+0x3df/0xb40 net/core/filter.c:4236
do_xdp_generic+0x50b/0x7c0 net/core/dev.c:4919
__netif_receive_skb_core+0x1706/0x3640 net/core/dev.c:5324
__netif_receive_skb_one_core net/core/dev.c:5499 [inline]
__netif_receive_skb+0x11c/0x530 net/core/dev.c:5615
process_backlog+0x31c/0x650 net/core/dev.c:6492
__napi_poll+0xc4/0x5a0 net/core/dev.c:7051
napi_poll net/core/dev.c:7118 [inline]
net_rx_action+0x47d/0xc50 net/core/dev.c:7208
handle_softirqs+0x25e/0x5c0 kernel/softirq.c:565
__do_softirq+0xb/0xd kernel/softirq.c:603
do_softirq+0xf6/0x150 kernel/softirq.c:452
__local_bh_enable_ip+0x75/0x80 kernel/softirq.c:379
__raw_read_unlock_bh include/linux/rwlock_api_smp.h:251 [inline]
_raw_read_unlock_bh+0x29/0x30 kernel/locking/spinlock.c:284
wg_socket_send_skb_to_peer+0x178/0x1d0 drivers/net/wireguard/socket.c:184
wg_packet_create_data_done drivers/net/wireguard/send.c:251 [inline]
wg_packet_tx_worker+0x1e6/0x530 drivers/net/wireguard/send.c:276
process_one_work+0x6bb/0xc10 kernel/workqueue.c:2325
worker_thread+0xad5/0x12a0 kernel/workqueue.c:2472
kthread+0x421/0x510 kernel/kthread.c:337
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
Modules linked in:
---[ end trace c793227b12796492 ]---
RIP: 0010:__pv_queued_spin_lock_slowpath+0x2f3/0xc40 kernel/locking/qspinlock.c:471
Code: 74 1e 48 89 4c 24 10 48 8b 7c 24 10 e8 86 98 5d 00 48 8b 4c 24 10 48 ba 00 00 00 00 00 fc ff df 4c 03 21 4c 89 e0 48 c1 e8 03 <80> 3c 10 00 74 12 4c 89 e7 e8 ff 98 5d 00 48 ba 00 00 00 00 00 fc
RSP: 0018:ffffc900000075c0 EFLAGS: 00010206
RAX: 0010f8fb9f81ff65 RBX: ffff8881f7038ad4 RCX: ffffffff86285820
RDX: dffffc0000000000 RSI: 0000000000000002 RDI: 00000000ffffffff
RBP: ffffc900000076b0 R08: ffffffff8141a99b R09: 0000000000000003
R10: fffffbfff0e9a84c R11: dffffc0000000001 R12: 0087c7dcfc0ffb29
R13: 1ffff11022fc62a0 R14: 1ffff1103ee07159 R15: ffff888117e31504
FS: 0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe6fea41000 CR3: 0000000006a0f000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 74 1e je 0x20
2: 48 89 4c 24 10 mov %rcx,0x10(%rsp)
7: 48 8b 7c 24 10 mov 0x10(%rsp),%rdi
c: e8 86 98 5d 00 call 0x5d9897
11: 48 8b 4c 24 10 mov 0x10(%rsp),%rcx
16: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx
1d: fc ff df
20: 4c 03 21 add (%rcx),%r12
23: 4c 89 e0 mov %r12,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 80 3c 10 00 cmpb $0x0,(%rax,%rdx,1) <-- trapping instruction
2e: 74 12 je 0x42
30: 4c 89 e7 mov %r12,%rdi
33: e8 ff 98 5d 00 call 0x5d9937
38: 48 rex.W
39: ba 00 00 00 00 mov $0x0,%edx
3e: 00 fc add %bh,%ah