------------[ cut here ]------------
WARNING: CPU: 1 PID: 4727 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 1 PID: 4727 Comm: syz.4.102 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Code: 24 45 31 f6 31 ff 89 de e8 6d f7 d8 ff 85 db 48 c7 c0 f2 ff ff ff 49 0f 44 c6 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 f0 f3 d8 ff <0f> 0b e9 1c ff ff ff 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c ea fe
RSP: 0018:ffffc90000dcfa68 EFLAGS: 00010246
RAX: ffffffff819ed660 RBX: 0000000000000000 RCX: ffff88801db43b80
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffffbfff1ff7a19
R10: fffffbfff1ff7a19 R11: 1ffffffff1ff7a18 R12: ffff88801db45308
R13: 1ffff920001b9f5c R14: ffffc90000dcfac8 R15: 0000000000000000
FS: 00007f41545776c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000006398a000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
bpf_probe_read_user_common kernel/trace/bpf_trace.c:157 [inline]
____bpf_probe_read_user kernel/trace/bpf_trace.c:166 [inline]
bpf_probe_read_user+0x26/0x70 kernel/trace/bpf_trace.c:163
bpf_prog_7e47b8e39696360c+0x32/0xc40
bpf_dispatcher_nop_func include/linux/bpf.h:888 [inline]
__bpf_prog_run include/linux/filter.h:628 [inline]
bpf_prog_run include/linux/filter.h:635 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:1878 [inline]
bpf_trace_run3+0x17e/0x320 kernel/trace/bpf_trace.c:1916
__bpf_trace_kmem_cache_free+0x99/0xc0 include/trace/events/kmem.h:138
trace_kmem_cache_free include/trace/events/kmem.h:138 [inline]
kmem_cache_free+0x1e7/0x210 mm/slub.c:3521
tcp_clean_rtx_queue net/ipv4/tcp_input.c:3407 [inline]
tcp_ack+0x2086/0x6260 net/ipv4/tcp_input.c:3964
tcp_rcv_established+0xea6/0x1cb0 net/ipv4/tcp_input.c:5981
tcp_v4_do_rcv+0x44b/0x9b0 net/ipv4/tcp_ipv4.c:1731
tcp_v4_rcv+0x268f/0x2cb0 net/ipv4/tcp_ipv4.c:2143
ip_protocol_deliver_rcu+0x3ad/0x770 net/ipv4/ip_input.c:204
ip_local_deliver_finish+0x1d5/0x320 net/ipv4/ip_input.c:231
NF_HOOK+0x2d6/0x360 include/linux/netfilter.h:302
dst_input include/net/dst.h:462 [inline]
ip_sublist_rcv_finish net/ipv4/ip_input.c:577 [inline]
ip_list_rcv_finish net/ipv4/ip_input.c:628 [inline]
ip_sublist_rcv+0xa1f/0xce0 net/ipv4/ip_input.c:636
ip_list_rcv+0x3df/0x430 net/ipv4/ip_input.c:671
__netif_receive_skb_list_ptype net/core/dev.c:5568 [inline]
__netif_receive_skb_list_core+0x574/0x740 net/core/dev.c:5616
__netif_receive_skb_list net/core/dev.c:5668 [inline]
netif_receive_skb_list_internal+0x871/0xb90 net/core/dev.c:5759
gro_normal_list net/core/dev.c:5913 [inline]
napi_complete_done+0x37d/0x830 net/core/dev.c:6651
virtqueue_napi_complete drivers/net/virtio_net.c:357 [inline]
virtnet_poll+0x912/0xef0 drivers/net/virtio_net.c:1624
__napi_poll+0xc0/0x430 net/core/dev.c:7075
napi_poll net/core/dev.c:7142 [inline]
net_rx_action+0x4a8/0x9c0 net/core/dev.c:7232
handle_softirqs+0x328/0x820 kernel/softirq.c:576
__do_softirq kernel/softirq.c:610 [inline]
invoke_softirq kernel/softirq.c:450 [inline]
__irq_exit_rcu+0x12f/0x220 kernel/softirq.c:659
irq_exit_rcu+0x5/0x20 kernel/softirq.c:671
common_interrupt+0xb5/0xd0 arch/x86/kernel/irq.c:242
asm_common_interrupt+0x22/0x40 arch/x86/include/asm/idtentry.h:667
RIP: 0010:lock_is_held_type+0x151/0x190 kernel/locking/lockdep.c:5671
Code: 41 f7 c5 00 02 00 00 74 01 fb 65 48 8b 04 25 28 00 00 00 48 3b 44 24 08 75 3c 89 e8 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d 0f 0b 48 c7 c7 20 18 0b 8a e8 60 0d 00 00 65 c7 05 e5 46 59 76
RSP: 0018:ffffc9000352f3d8 EFLAGS: 00000282
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 49955d5b49c0fb00
RDX: 0000000000000002 RSI: ffffffff8a0b2ac0 RDI: ffffffff8a59a4c0
RBP: ffffc9000352f458 R08: dffffc0000000000 R09: fffffbfff1ff7a19
R10: fffffbfff1ff7a19 R11: 1ffffffff1ff7a18 R12: dffffc0000000000
R13: dffffc0000000000 R14: 1ffff920006a5e7c R15: dffffc0000000000
lock_is_held include/linux/lockdep.h:287 [inline]
rcu_read_lock_sched_held+0x86/0xf0 kernel/rcu/update.c:125
task_css include/linux/cgroup.h:496 [inline]
blk_cgroup_congested include/linux/blk-cgroup.h:283 [inline]
__cgroup_throttle_swaprate+0x147/0x530 mm/swapfile.c:3809
cgroup_throttle_swaprate include/linux/swap.h:728 [inline]
shmem_add_to_page_cache+0xb7b/0x14b0 mm/shmem.c:727
shmem_getpage_gfp+0x1793/0x2d40 mm/shmem.c:1940
shmem_fault+0x1a9/0x520 mm/shmem.c:2118
__do_fault+0x141/0x330 mm/memory.c:3928
do_read_fault mm/memory.c:4264 [inline]
do_fault mm/memory.c:4392 [inline]
handle_pte_fault mm/memory.c:4650 [inline]
__handle_mm_fault mm/memory.c:4785 [inline]
handle_mm_fault+0x2949/0x43c0 mm/memory.c:4883
faultin_page mm/gup.c:976 [inline]
__get_user_pages+0x93e/0x11c0 mm/gup.c:1197
populate_vma_page_range+0x213/0x290 mm/gup.c:1529
__mm_populate+0x26f/0x3a0 mm/gup.c:1638
mm_populate include/linux/mm.h:2646 [inline]
vm_mmap_pgoff+0x203/0x2b0 mm/util.c:556
ksys_mmap_pgoff+0x140/0x780 mm/mmap.c:1635
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f415630fec9
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:00007f4154577038 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f4156566fa0 RCX: 00007f415630fec9
RDX: b635773f06ebbeee RSI: 0000000000b36000 RDI: 0000200000000000
RBP: 00007f4156392f91 R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4156567038 R14: 00007f4156566fa0 R15: 00007ffe3fdc6a18
----------------
Code disassembly (best guess):
0: 41 f7 c5 00 02 00 00 test $0x200,%r13d
7: 74 01 je 0xa
9: fb sti
a: 65 48 8b 04 25 28 00 mov %gs:0x28,%rax
11: 00 00
13: 48 3b 44 24 08 cmp 0x8(%rsp),%rax
18: 75 3c jne 0x56
1a: 89 e8 mov %ebp,%eax
1c: 48 83 c4 10 add $0x10,%rsp
20: 5b pop %rbx
21: 41 5c pop %r12
23: 41 5d pop %r13
25: 41 5e pop %r14
27: 41 5f pop %r15
29: 5d pop %rbp
* 2a: c3 ret <-- trapping instruction
2b: 0f 0b ud2
2d: 48 c7 c7 20 18 0b 8a mov $0xffffffff8a0b1820,%rdi
34: e8 60 0d 00 00 call 0xd99
39: 65 gs
3a: c7 .byte 0xc7
3b: 05 e5 46 59 76 add $0x765946e5,%eax