==================================================================
BUG: KASAN: use-after-free in cpu_map_generic_redirect+0x1c7/0x780 kernel/bpf/cpumap.c:788
Read of size 8 at addr ffff88812ac26b18 by task syz.1.2230/5843
CPU: 1 PID: 5843 Comm: syz.1.2230 Not tainted 6.1.90-syzkaller-00023-gedca080b95df #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x151/0x1b7 lib/dump_stack.c:106
print_address_description mm/kasan/report.c:316 [inline]
print_report+0x158/0x4e0 mm/kasan/report.c:427
kasan_report+0x13c/0x170 mm/kasan/report.c:531
__asan_report_load8_noabort+0x14/0x20 mm/kasan/report_generic.c:351
cpu_map_generic_redirect+0x1c7/0x780 kernel/bpf/cpumap.c:788
xdp_do_generic_redirect_map net/core/filter.c:4367 [inline]
xdp_do_generic_redirect+0x3b5/0xad0 net/core/filter.c:4412
do_xdp_generic+0x53e/0x800 net/core/dev.c:4954
tun_get_user+0x238a/0x3a90 drivers/net/tun.c:1920
tun_chr_write_iter+0x129/0x210 drivers/net/tun.c:2044
call_write_iter include/linux/fs.h:2274 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x902/0xeb0 fs/read_write.c:584
ksys_write+0x199/0x2c0 fs/read_write.c:637
__do_sys_write fs/read_write.c:649 [inline]
__se_sys_write fs/read_write.c:646 [inline]
__x64_sys_write+0x7b/0x90 fs/read_write.c:646
x64_sys_call+0x2f/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:2
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fd78257895f
Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 c9 8d 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 1c 8e 02 00 48
RSP: 002b:00007fd7832f7000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fd782715f80 RCX: 00007fd78257895f
RDX: 0000000000000d86 RSI: 0000000020001580 RDI: 00000000000000c8
RBP: 00007fd7825e7916 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000d86 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fd782715f80 R15: 00007ffef5fb70f8
</TASK>
Allocated by task 5617:
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
kasan_save_alloc_info+0x1f/0x30 mm/kasan/generic.c:505
____kasan_kmalloc mm/kasan/common.c:379 [inline]
__kasan_kmalloc+0x9c/0xb0 mm/kasan/common.c:388
kasan_kmalloc include/linux/kasan.h:212 [inline]
__do_kmalloc_node mm/slab_common.c:957 [inline]
__kmalloc_node+0xb4/0x1e0 mm/slab_common.c:964
kmalloc_node include/linux/slab.h:582 [inline]
bpf_map_kmalloc_node+0xd0/0x2c0 kernel/bpf/syscall.c:454
__cpu_map_entry_alloc kernel/bpf/cpumap.c:445 [inline]
cpu_map_update_elem+0x28f/0xf50 kernel/bpf/cpumap.c:603
bpf_map_update_value+0x1a3/0x410 kernel/bpf/syscall.c:190
map_update_elem+0x500/0x680 kernel/bpf/syscall.c:1428
__sys_bpf+0x460/0x7f0 kernel/bpf/syscall.c:4975
__do_sys_bpf kernel/bpf/syscall.c:5091 [inline]
__se_sys_bpf kernel/bpf/syscall.c:5089 [inline]
__x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5089
x64_sys_call+0x87f/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:322
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
Freed by task 5621:
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:516
____kasan_slab_free+0x131/0x180 mm/kasan/common.c:241
__kasan_slab_free+0x11/0x20 mm/kasan/common.c:249
kasan_slab_free include/linux/kasan.h:178 [inline]
slab_free_hook mm/slub.c:1745 [inline]
slab_free_freelist_hook mm/slub.c:1771 [inline]
slab_free mm/slub.c:3684 [inline]
__kmem_cache_free+0x218/0x3b0 mm/slub.c:3697
kfree+0x7a/0xf0 mm/slab_common.c:1009
put_cpu_map_entry+0x6e2/0x760 kernel/bpf/cpumap.c:161
cpu_map_kthread_run+0x2463/0x2520 kernel/bpf/cpumap.c:408
kthread+0x26d/0x300 kernel/kthread.c:386
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Last potentially related work creation:
kasan_save_stack+0x3b/0x60 mm/kasan/common.c:45
__kasan_record_aux_stack+0xb4/0xc0 mm/kasan/generic.c:486
kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:496
insert_work+0x56/0x310 kernel/workqueue.c:1368
__queue_work+0x9b6/0xd70 kernel/workqueue.c:1527
queue_work_on+0x105/0x170 kernel/workqueue.c:1555
queue_work include/linux/workqueue.h:510 [inline]
schedule_work include/linux/workqueue.h:571 [inline]
__cpu_map_entry_replace kernel/bpf/cpumap.c:558 [inline]
cpu_map_free+0x1e7/0x2c0 kernel/bpf/cpumap.c:641
bpf_map_free_deferred+0xf7/0x1b0 kernel/bpf/syscall.c:622
process_one_work+0x73d/0xcb0 kernel/workqueue.c:2299
worker_thread+0xa60/0x1260 kernel/workqueue.c:2446
kthread+0x26d/0x300 kernel/kthread.c:386
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Second to last potentially related work creation:
kasan_save_stack+0x3b/0x60 mm/kasan/common.c:45
__kasan_record_aux_stack+0xb4/0xc0 mm/kasan/generic.c:486
kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:496
__call_rcu_common kernel/rcu/tree.c:2806 [inline]
call_rcu+0xee/0x1340 kernel/rcu/tree.c:2925
__cpu_map_entry_replace kernel/bpf/cpumap.c:556 [inline]
cpu_map_free+0x109/0x2c0 kernel/bpf/cpumap.c:641
bpf_map_free_deferred+0xf7/0x1b0 kernel/bpf/syscall.c:622
process_one_work+0x73d/0xcb0 kernel/workqueue.c:2299
worker_thread+0xa60/0x1260 kernel/workqueue.c:2446
kthread+0x26d/0x300 kernel/kthread.c:386
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
The buggy address belongs to the object at ffff88812ac26b00
which belongs to the cache kmalloc-192 of size 192
The buggy address is located 24 bytes inside of
192-byte region [ffff88812ac26b00, ffff88812ac26bc0)
The buggy address belongs to the physical page:
page:ffffea0004ab0980 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x12ac26
flags: 0x4000000000000200(slab|zone=1)
raw: 4000000000000200 ffffea00044f1d40 dead000000000004 ffff888100042c00
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 289, tgid 289 (syz-executor), ts 20188714172, free_ts 0
set_page_owner include/linux/page_owner.h:33 [inline]
post_alloc_hook+0x213/0x220 mm/page_alloc.c:2590
prep_new_page+0x1b/0x110 mm/page_alloc.c:2597
get_page_from_freelist+0x27ea/0x2870 mm/page_alloc.c:4425
__alloc_pages+0x3a1/0x780 mm/page_alloc.c:5714
alloc_slab_page+0x6c/0xf0
allocate_slab mm/slub.c:1962 [inline]
new_slab+0x90/0x3e0 mm/slub.c:2015
___slab_alloc+0x6f9/0xb80 mm/slub.c:3203
__slab_alloc+0x5d/0xa0 mm/slub.c:3302
slab_alloc_node mm/slub.c:3387 [inline]
__kmem_cache_alloc_node+0x1af/0x250 mm/slub.c:3460
__do_kmalloc_node mm/slab_common.c:956 [inline]
__kmalloc_node_track_caller+0xa2/0x1e0 mm/slab_common.c:977
kmemdup+0x29/0x60 mm/util.c:134
_Z7kmemdupPKvU17pass_object_size0mj include/linux/fortify-string.h:585 [inline]
fib_rules_register+0x2e/0x420 net/core/fib_rules.c:169
fib4_rules_init+0x22/0x170 net/ipv4/fib_rules.c:415
ip_fib_net_init net/ipv4/fib_frontend.c:1554 [inline]
fib_net_init+0x127/0x2d0 net/ipv4/fib_frontend.c:1607
ops_init+0x1cf/0x490 net/core/net_namespace.c:135
setup_net+0x4ca/0xd60 net/core/net_namespace.c:332
page_owner free stack trace missing
Memory state around the buggy address:
ffff88812ac26a00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88812ac26a80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
>ffff88812ac26b00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88812ac26b80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
ffff88812ac26c00: 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:131:9
index 16382 is out of range for type 'unsigned long[8]'
CPU: 1 PID: 5843 Comm: syz.1.2230 Tainted: G B 6.1.90-syzkaller-00023-gedca080b95df #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x151/0x1b7 lib/dump_stack.c:106
dump_stack+0x15/0x1c lib/dump_stack.c:113
ubsan_epilogue lib/ubsan.c:151 [inline]
__ubsan_handle_out_of_bounds+0x13a/0x160 lib/ubsan.c:282
decode_tail kernel/locking/qspinlock.c:131 [inline]
__pv_queued_spin_lock_slowpath+0xb96/0xda0 kernel/locking/qspinlock.c:471
pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:591 [inline]
queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:51 [inline]
queued_spin_lock include/asm-generic/qspinlock.h:114 [inline]
do_raw_spin_lock include/linux/spinlock.h:187 [inline]
__raw_spin_lock include/linux/spinlock_api_smp.h:134 [inline]
_raw_spin_lock+0x139/0x1b0 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:351 [inline]
ptr_ring_produce include/linux/ptr_ring.h:128 [inline]
cpu_map_generic_redirect+0x1f4/0x780 kernel/bpf/cpumap.c:788
xdp_do_generic_redirect_map net/core/filter.c:4367 [inline]
xdp_do_generic_redirect+0x3b5/0xad0 net/core/filter.c:4412
do_xdp_generic+0x53e/0x800 net/core/dev.c:4954
tun_get_user+0x238a/0x3a90 drivers/net/tun.c:1920
tun_chr_write_iter+0x129/0x210 drivers/net/tun.c:2044
call_write_iter include/linux/fs.h:2274 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x902/0xeb0 fs/read_write.c:584
ksys_write+0x199/0x2c0 fs/read_write.c:637
__do_sys_write fs/read_write.c:649 [inline]
__se_sys_write fs/read_write.c:646 [inline]
__x64_sys_write+0x7b/0x90 fs/read_write.c:646
x64_sys_call+0x2f/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:2
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fd78257895f
Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 c9 8d 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 1c 8e 02 00 48
RSP: 002b:00007fd7832f7000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fd782715f80 RCX: 00007fd78257895f
RDX: 0000000000000d86 RSI: 0000000020001580 RDI: 00000000000000c8
RBP: 00007fd7825e7916 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000d86 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fd782715f80 R15: 00007ffef5fb70f8
</TASK>
================================================================================
general protection fault, probably for non-canonical address 0xe012953f9f5ba219: 0000 [#1] PREEMPT SMP KASAN
KASAN: maybe wild-memory-access in range [0x0094c9fcfadd10c8-0x0094c9fcfadd10cf]
CPU: 1 PID: 5843 Comm: syz.1.2230 Tainted: G B 6.1.90-syzkaller-00023-gedca080b95df #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:__pv_queued_spin_lock_slowpath+0x2f5/0xda0 kernel/locking/qspinlock.c:474
Code: 4c 89 e8 48 c1 e8 03 80 3c 10 00 74 12 4c 89 ef e8 20 35 9d fc 48 ba 00 00 00 00 00 fc ff df 49 03 5d 00 48 89 d8 48 c1 e8 03 <80> 3c 10 00 74 12 48 89 df e8 9d 35 9d fc 48 ba 00 00 00 00 00 fc
RSP: 0018:ffffc9000367f580 EFLAGS: 00010202
RAX: 0012993f9f5ba219 RBX: 0094c9fcfadd10cb RCX: 0000000000040000
RDX: dffffc0000000000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: ffffc9000367f670 R08: ffffffff8144920b R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 1ffff11021dbcf20
R13: ffffffff86561870 R14: 1ffff1103ee27179 R15: ffff88810ede7904
FS: 00007fd7832f76c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020002000 CR3: 0000000129c1d000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:591 [inline]
queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:51 [inline]
queued_spin_lock include/asm-generic/qspinlock.h:114 [inline]
do_raw_spin_lock include/linux/spinlock.h:187 [inline]
__raw_spin_lock include/linux/spinlock_api_smp.h:134 [inline]
_raw_spin_lock+0x139/0x1b0 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:351 [inline]
ptr_ring_produce include/linux/ptr_ring.h:128 [inline]
cpu_map_generic_redirect+0x1f4/0x780 kernel/bpf/cpumap.c:788
xdp_do_generic_redirect_map net/core/filter.c:4367 [inline]
xdp_do_generic_redirect+0x3b5/0xad0 net/core/filter.c:4412
do_xdp_generic+0x53e/0x800 net/core/dev.c:4954
tun_get_user+0x238a/0x3a90 drivers/net/tun.c:1920
tun_chr_write_iter+0x129/0x210 drivers/net/tun.c:2044
call_write_iter include/linux/fs.h:2274 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x902/0xeb0 fs/read_write.c:584
ksys_write+0x199/0x2c0 fs/read_write.c:637
__do_sys_write fs/read_write.c:649 [inline]
__se_sys_write fs/read_write.c:646 [inline]
__x64_sys_write+0x7b/0x90 fs/read_write.c:646
x64_sys_call+0x2f/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:2
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fd78257895f
Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 c9 8d 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 1c 8e 02 00 48
RSP: 002b:00007fd7832f7000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fd782715f80 RCX: 00007fd78257895f
RDX: 0000000000000d86 RSI: 0000000020001580 RDI: 00000000000000c8
RBP: 00007fd7825e7916 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000d86 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fd782715f80 R15: 00007ffef5fb70f8
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__pv_queued_spin_lock_slowpath+0x2f5/0xda0 kernel/locking/qspinlock.c:474
Code: 4c 89 e8 48 c1 e8 03 80 3c 10 00 74 12 4c 89 ef e8 20 35 9d fc 48 ba 00 00 00 00 00 fc ff df 49 03 5d 00 48 89 d8 48 c1 e8 03 <80> 3c 10 00 74 12 48 89 df e8 9d 35 9d fc 48 ba 00 00 00 00 00 fc
RSP: 0018:ffffc9000367f580 EFLAGS: 00010202
RAX: 0012993f9f5ba219 RBX: 0094c9fcfadd10cb RCX: 0000000000040000
RDX: dffffc0000000000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: ffffc9000367f670 R08: ffffffff8144920b R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 1ffff11021dbcf20
R13: ffffffff86561870 R14: 1ffff1103ee27179 R15: ffff88810ede7904
FS: 00007fd7832f76c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020002000 CR3: 0000000129c1d000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 4c 89 e8 mov %r13,%rax
3: 48 c1 e8 03 shr $0x3,%rax
7: 80 3c 10 00 cmpb $0x0,(%rax,%rdx,1)
b: 74 12 je 0x1f
d: 4c 89 ef mov %r13,%rdi
10: e8 20 35 9d fc call 0xfc9d3535
15: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx
1c: fc ff df
1f: 49 03 5d 00 add 0x0(%r13),%rbx
23: 48 89 d8 mov %rbx,%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: 48 89 df mov %rbx,%rdi
33: e8 9d 35 9d fc call 0xfc9d35d5
38: 48 rex.W
39: ba 00 00 00 00 mov $0x0,%edx
3e: 00 fc add %bh,%ah