==================================================================
BUG: KASAN: slab-out-of-bounds in dev_map_enqueue+0x40/0x340 kernel/bpf/devmap.c:532
Read of size 8 at addr ffff88813bd75d80 by task syz.4.2460/6042
CPU: 1 PID: 6042 Comm: syz.4.2460 Not tainted 6.1.118-syzkaller-00025-gef4fb40b87a9 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Call Trace:
__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
dev_map_enqueue+0x40/0x340 kernel/bpf/devmap.c:532
__xdp_do_redirect_frame net/core/filter.c:4296 [inline]
xdp_do_redirect_frame+0x2b5/0x800 net/core/filter.c:4358
xdp_test_run_batch net/bpf/test_run.c:314 [inline]
bpf_test_run_xdp_live+0xc30/0x1f70 net/bpf/test_run.c:362
bpf_prog_test_run_xdp+0x7d1/0x1130 net/bpf/test_run.c:1393
bpf_prog_test_run+0x3b0/0x630 kernel/bpf/syscall.c:3665
__sys_bpf+0x59f/0x7f0 kernel/bpf/syscall.c:5020
__do_sys_bpf kernel/bpf/syscall.c:5106 [inline]
__se_sys_bpf kernel/bpf/syscall.c:5104 [inline]
__x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5104
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
RIP: 0033:0x7f930db8cd29
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f930e9cf038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f930dda5fa0 RCX: 00007f930db8cd29
RDX: 0000000000000050 RSI: 00000000200000c0 RDI: 000000000000000a
RBP: 00007f930dc0e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f930dda5fa0 R15: 00007ffc95d30c08
Allocated by task 5852:
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:938 [inline]
__kmalloc_node+0xb4/0x1e0 mm/slab_common.c:945
kmalloc_node include/linux/slab.h:583 [inline]
kvmalloc_node+0x221/0x640 mm/util.c:592
kvmalloc include/linux/slab.h:710 [inline]
kvmalloc_array include/linux/slab.h:728 [inline]
__ptr_ring_init_queue_alloc include/linux/ptr_ring.h:471 [inline]
ptr_ring_init include/linux/ptr_ring.h:489 [inline]
skb_array_init include/linux/skb_array.h:182 [inline]
pfifo_fast_init+0x3aa/0x7a0 net/sched/sch_generic.c:867
qdisc_create_dflt+0x144/0x3e0 net/sched/sch_generic.c:1013
mq_init+0x2c8/0x6b0 net/sched/sch_mq.c:90
qdisc_create_dflt+0x144/0x3e0 net/sched/sch_generic.c:1013
attach_default_qdiscs net/sched/sch_generic.c:1192 [inline]
dev_activate+0x159/0x1130 net/sched/sch_generic.c:1246
__dev_open+0x3c7/0x4e0 net/core/dev.c:1474
__dev_change_flags+0x1db/0x6e0 net/core/dev.c:8609
dev_change_flags+0x8c/0x1a0 net/core/dev.c:8680
dev_ifsioc+0x177/0x1150 net/core/dev_ioctl.c:327
dev_ioctl+0x543/0xe60 net/core/dev_ioctl.c:588
sock_do_ioctl+0x26b/0x450 net/socket.c:1208
sock_ioctl+0x455/0x740 net/socket.c:1311
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl+0x114/0x190 fs/ioctl.c:856
__x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:856
x64_sys_call+0x98/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:17
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 5851:
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:3686 [inline]
__kmem_cache_free+0x21d/0x410 mm/slub.c:3702
kfree+0x7a/0xf0 mm/slab_common.c:990
kvfree+0x35/0x40 mm/util.c:639
ptr_ring_cleanup include/linux/ptr_ring.h:671 [inline]
pfifo_fast_destroy+0xbf/0xd0 net/sched/sch_generic.c:893
__qdisc_destroy+0x9f/0x2a0 net/sched/sch_generic.c:1073
qdisc_put net/sched/sch_generic.c:1100 [inline]
shutdown_scheduler_queue net/sched/sch_generic.c:1153 [inline]
netdev_for_each_tx_queue include/linux/netdevice.h:2503 [inline]
dev_shutdown+0x192/0x560 net/sched/sch_generic.c:1485
unregister_netdevice_many+0xa17/0x1730 net/core/dev.c:10897
unregister_netdevice_queue+0x2e6/0x350 net/core/dev.c:10837
unregister_netdevice include/linux/netdevice.h:3100 [inline]
__tun_detach+0xd14/0x1510 drivers/net/tun.c:685
tun_detach drivers/net/tun.c:701 [inline]
tun_chr_close+0x92/0x140 drivers/net/tun.c:3492
__fput+0x1e5/0x870 fs/file_table.c:320
____fput+0x15/0x20 fs/file_table.c:348
task_work_run+0x24d/0x2e0 kernel/task_work.c:203
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0x94/0xa0 kernel/entry/common.c:177
exit_to_user_mode_prepare+0x5a/0xa0 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
syscall_exit_to_user_mode+0x26/0x130 kernel/entry/common.c:303
do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87
entry_SYSCALL_64_after_hwframe+0x68/0xd2
The buggy address belongs to the object at ffff88813bd74000
which belongs to the cache kmalloc-4k of size 4096
The buggy address is located 3456 bytes to the right of
4096-byte region [ffff88813bd74000, ffff88813bd75000)
The buggy address belongs to the physical page:
page:ffffea0004ef5c00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x13bd70
head:ffffea0004ef5c00 order:3 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head|zone=1)
raw: 4000000000010200 0000000000000000 dead000000000122 ffff888100043380
raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 5852, tgid 5851 (syz.2.2378), ts 198222262937, free_ts 197236689113
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+0x2f41/0x2fc0 mm/page_alloc.c:4462
__alloc_pages+0x234/0x610 mm/page_alloc.c:5759
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+0x207/0x2a0 mm/slub.c:3462
__do_kmalloc_node mm/slab_common.c:937 [inline]
__kmalloc_node+0xa3/0x1e0 mm/slab_common.c:945
kmalloc_node include/linux/slab.h:583 [inline]
kvmalloc_node+0x221/0x640 mm/util.c:592
kvmalloc include/linux/slab.h:710 [inline]
kvmalloc_array include/linux/slab.h:728 [inline]
__ptr_ring_init_queue_alloc include/linux/ptr_ring.h:471 [inline]
ptr_ring_init include/linux/ptr_ring.h:489 [inline]
skb_array_init include/linux/skb_array.h:182 [inline]
pfifo_fast_init+0x3aa/0x7a0 net/sched/sch_generic.c:867
qdisc_create_dflt+0x144/0x3e0 net/sched/sch_generic.c:1013
mq_init+0x2c8/0x6b0 net/sched/sch_mq.c:90
qdisc_create_dflt+0x144/0x3e0 net/sched/sch_generic.c:1013
attach_default_qdiscs net/sched/sch_generic.c:1192 [inline]
dev_activate+0x159/0x1130 net/sched/sch_generic.c:1246
page last free stack trace:
reset_page_owner include/linux/page_owner.h:26 [inline]
free_pages_prepare mm/page_alloc.c:1498 [inline]
free_pcp_prepare mm/page_alloc.c:1572 [inline]
free_unref_page_prepare+0x83d/0x850 mm/page_alloc.c:3511
free_unref_page+0xb2/0x5c0 mm/page_alloc.c:3607
free_the_page mm/page_alloc.c:798 [inline]
free_compound_page+0x9d/0xd0 mm/page_alloc.c:821
destroy_large_folio+0x56/0x90 mm/page_alloc.c:858
__folio_put_large mm/swap.c:118 [inline]
__folio_put+0xcf/0xe0 mm/swap.c:126
folio_put include/linux/mm.h:1431 [inline]
put_page include/linux/mm.h:1483 [inline]
__skb_frag_unref include/linux/skbuff.h:3455 [inline]
skb_release_data+0x3c1/0x840 net/core/skbuff.c:785
skb_release_all net/core/skbuff.c:856 [inline]
__kfree_skb+0x50/0x70 net/core/skbuff.c:870
tcp_wmem_free_skb include/net/tcp.h:305 [inline]
tcp_rtx_queue_unlink_and_free+0x3d5/0x610 include/net/tcp.h:1960
tcp_clean_rtx_queue net/ipv4/tcp_input.c:3400 [inline]
tcp_ack+0x2437/0x6a30 net/ipv4/tcp_input.c:3959
tcp_rcv_established+0xe31/0x1c60 net/ipv4/tcp_input.c:6006
tcp_v4_do_rcv+0x430/0xa20 net/ipv4/tcp_ipv4.c:1683
tcp_v4_rcv+0x20d7/0x2a30 net/ipv4/tcp_ipv4.c:2114
ip_protocol_deliver_rcu+0x32f/0x720 net/ipv4/ip_input.c:205
ip_local_deliver_finish+0x246/0x400 net/ipv4/ip_input.c:233
NF_HOOK include/linux/netfilter.h:305 [inline]
ip_local_deliver+0x1b3/0x3b0 net/ipv4/ip_input.c:254
dst_input include/net/dst.h:454 [inline]
ip_sublist_rcv_finish net/ipv4/ip_input.c:580 [inline]
ip_list_rcv_finish net/ipv4/ip_input.c:631 [inline]
ip_sublist_rcv+0x7e5/0x990 net/ipv4/ip_input.c:639
Memory state around the buggy address:
ffff88813bd75c80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88813bd75d00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88813bd75d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
^
ffff88813bd75e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88813bd75e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
general protection fault, probably for non-canonical address 0xdffffc000000001a: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x00000000000000d0-0x00000000000000d7]
CPU: 1 PID: 6042 Comm: syz.4.2460 Tainted: G B 6.1.118-syzkaller-00025-gef4fb40b87a9 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:__xdp_enqueue kernel/bpf/devmap.c:481 [inline]
RIP: 0010:dev_map_enqueue+0x72/0x340 kernel/bpf/devmap.c:534
Code: 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 03 74 25 00 48 8b 03 48 89 45 c8 4d 8d ae d0 00 00 00 4c 89 e8 48 c1 e8 03 <42> 80 3c 20 00 74 08 4c 89 ef e8 df 73 25 00 bb 20 02 00 00 49 03
RSP: 0018:ffffc9000cb5f5f8 EFLAGS: 00010202
RAX: 000000000000001a RBX: ffff88813bd75da0 RCX: ffffffff8197883d
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88813bd75da0
RBP: ffffc9000cb5f638 R08: ffffffff8144a503 R09: fffffbfff0f6e2fd
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 00000000000000d0 R14: 0000000000000000 R15: ffff8881456f6070
FS: 00007f930e9cf6c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9f4ae4ae65 CR3: 0000000143ba6000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__xdp_do_redirect_frame net/core/filter.c:4296 [inline]
xdp_do_redirect_frame+0x2b5/0x800 net/core/filter.c:4358
xdp_test_run_batch net/bpf/test_run.c:314 [inline]
bpf_test_run_xdp_live+0xc30/0x1f70 net/bpf/test_run.c:362
bpf_prog_test_run_xdp+0x7d1/0x1130 net/bpf/test_run.c:1393
bpf_prog_test_run+0x3b0/0x630 kernel/bpf/syscall.c:3665
__sys_bpf+0x59f/0x7f0 kernel/bpf/syscall.c:5020
__do_sys_bpf kernel/bpf/syscall.c:5106 [inline]
__se_sys_bpf kernel/bpf/syscall.c:5104 [inline]
__x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5104
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
RIP: 0033:0x7f930db8cd29
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f930e9cf038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f930dda5fa0 RCX: 00007f930db8cd29
RDX: 0000000000000050 RSI: 00000000200000c0 RDI: 000000000000000a
RBP: 00007f930dc0e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f930dda5fa0 R15: 00007ffc95d30c08
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__xdp_enqueue kernel/bpf/devmap.c:481 [inline]
RIP: 0010:dev_map_enqueue+0x72/0x340 kernel/bpf/devmap.c:534
Code: 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 03 74 25 00 48 8b 03 48 89 45 c8 4d 8d ae d0 00 00 00 4c 89 e8 48 c1 e8 03 <42> 80 3c 20 00 74 08 4c 89 ef e8 df 73 25 00 bb 20 02 00 00 49 03
RSP: 0018:ffffc9000cb5f5f8 EFLAGS: 00010202
RAX: 000000000000001a RBX: ffff88813bd75da0 RCX: ffffffff8197883d
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88813bd75da0
RBP: ffffc9000cb5f638 R08: ffffffff8144a503 R09: fffffbfff0f6e2fd
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 00000000000000d0 R14: 0000000000000000 R15: ffff8881456f6070
FS: 00007f930e9cf6c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9f4ae4ae65 CR3: 0000000143ba6000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 89 d8 mov %ebx,%eax
2: 48 c1 e8 03 shr $0x3,%rax
6: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1)
b: 74 08 je 0x15
d: 48 89 df mov %rbx,%rdi
10: e8 03 74 25 00 call 0x257418
15: 48 8b 03 mov (%rbx),%rax
18: 48 89 45 c8 mov %rax,-0x38(%rbp)
1c: 4d 8d ae d0 00 00 00 lea 0xd0(%r14),%r13
23: 4c 89 e8 mov %r13,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) <-- trapping instruction
2f: 74 08 je 0x39
31: 4c 89 ef mov %r13,%rdi
34: e8 df 73 25 00 call 0x257418
39: bb 20 02 00 00 mov $0x220,%ebx
3e: 49 rex.WB
3f: 03 .byte 0x3