------------[ cut here ]------------
WARNING: CPU: 1 PID: 7363 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 1 PID: 7363 Comm: syz.2.851 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
RIP: 0010:copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Code: 24 45 31 f6 31 ff 89 de e8 7d 7a 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 00 77 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:ffffc90000dcfec8 EFLAGS: 00010246
RAX: ffffffff81a0b690 RBX: 0000000000000000 RCX: ffff888027adbb80
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffc90000dd02f7 R09: ffffc90000dd02c4
R10: dffffc0000000000 R11: fffff520001ba05f R12: ffff888027add328
R13: ffffc9000120a030 R14: ffffc90000dcff28 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000002e5000 CR3: 000000000ce8e000 CR4: 00000000003506e0
DR0: 0000200000000c00 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
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_f2594087b0f175cc+0x32/0xb08
bpf_dispatcher_nop_func include/linux/bpf.h:890 [inline]
__bpf_prog_run include/linux/filter.h:628 [inline]
bpf_prog_run include/linux/filter.h:635 [inline]
bpf_prog_run_pin_on_cpu include/linux/filter.h:652 [inline]
bpf_flow_dissect+0x128/0x400 net/core/flow_dissector.c:896
__skb_flow_dissect+0x7dc/0x61d0 net/core/flow_dissector.c:1032
__skb_get_hash_net+0xda/0x4d0 net/core/flow_dissector.c:1713
skb_get_hash include/linux/skbuff.h:1440 [inline]
skb_tx_hash net/core/dev.c:3256 [inline]
netdev_pick_tx+0x337/0xad0 net/core/dev.c:4154
netdev_core_pick_tx+0x141/0x300 net/core/dev.c:4187
__dev_queue_xmit+0x797/0x2e50 net/core/dev.c:4262
hsr_xmit net/hsr/hsr_forward.c:340 [inline]
hsr_forward_do net/hsr/hsr_forward.c:431 [inline]
hsr_forward_skb+0xf82/0x16b0 net/hsr/hsr_forward.c:584
send_hsr_supervision_frame+0x5f7/0xb90 net/hsr/hsr_device.c:348
hsr_announce+0x168/0x310 net/hsr/hsr_device.c:404
call_timer_fn+0x17b/0x540 kernel/time/timer.c:1648
expire_timers kernel/time/timer.c:1699 [inline]
__run_timers+0x56c/0x810 kernel/time/timer.c:1970
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1983
handle_softirqs+0x336/0x830 kernel/softirq.c:576
__do_softirq kernel/softirq.c:610 [inline]
invoke_softirq kernel/softirq.c:450 [inline]
__irq_exit_rcu+0x13b/0x230 kernel/softirq.c:659
irq_exit_rcu+0x5/0x20 kernel/softirq.c:671
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x0/0x80 kernel/kcov.c:300
Code: 28 4d 39 ca 77 22 89 ff 89 f6 4a c7 44 02 08 05 00 00 00 4a 89 7c 02 10 4a 89 74 02 18 4a 89 44 02 20 48 ff c1 48 89 0a c3 90 <48> 8b 04 24 65 48 8b 0d 44 3e 89 7e 65 8b 15 45 3e 89 7e 81 e2 00
RSP: 0018:ffffc90002eeed48 EFLAGS: 00000246
RAX: ffffffff8198a129 RBX: 0000000080000003 RCX: ffff888027adbb80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000002 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1cda646 R12: ffffe8ffffd3ea00
R13: dffffc0000000000 R14: ffff8880b8f00000 R15: dffffc0000000000
interrupt_context_level include/linux/preempt.h:96 [inline]
get_recursion_context kernel/events/internal.h:214 [inline]
perf_swevent_get_recursion_context+0x8e/0x150 kernel/events/core.c:9756
perf_trace_buf_alloc+0x54/0x300 kernel/trace/trace_event_perf.c:414
perf_trace_lock_acquire+0x1a5/0x3f0 include/trace/events/lock.h:13
trace_lock_acquire include/trace/events/lock.h:13 [inline]
lock_acquire+0x3d7/0x400 kernel/locking/lockdep.c:5708
rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:313
rcu_read_lock include/linux/rcupdate.h:740 [inline]
BPF_PROG_RUN_ARRAY include/linux/bpf.h:1433 [inline]
trace_call_bpf+0xf9/0x5b0 kernel/trace/bpf_trace.c:127
perf_trace_run_bpf_submit+0x79/0x1c0 kernel/events/core.c:10028
perf_trace_lock_acquire+0x341/0x3f0 include/trace/events/lock.h:13
trace_lock_acquire include/trace/events/lock.h:13 [inline]
lock_acquire+0x3d7/0x400 kernel/locking/lockdep.c:5708
rcu_lock_acquire+0x20/0x30 include/linux/rcupdate.h:313
rcu_read_lock include/linux/rcupdate.h:740 [inline]
lock_page_memcg+0xa5/0x440 mm/memcontrol.c:2047
page_remove_rmap+0x2a/0x10f0 mm/rmap.c:1355
zap_pte_range mm/memory.c:1384 [inline]
zap_pmd_range mm/memory.c:1505 [inline]
zap_pud_range mm/memory.c:1534 [inline]
zap_p4d_range mm/memory.c:1555 [inline]
unmap_page_range+0xee4/0x2410 mm/memory.c:1576
unmap_vmas+0x131/0x250 mm/memory.c:1653
exit_mmap+0x3b9/0x640 mm/mmap.c:3224
__mmput+0x115/0x390 kernel/fork.c:1136
exit_mm+0x632/0x7b0 kernel/exit.c:557
do_exit+0x5b8/0x2100 kernel/exit.c:877
do_group_exit+0x12c/0x2f0 kernel/exit.c:1004
get_signal+0x7eb/0x12e0 kernel/signal.c:2917
arch_do_signal_or_restart+0xe6/0x12a0 arch/x86/kernel/signal.c:867
handle_signal_work kernel/entry/common.c:157 [inline]
exit_to_user_mode_loop+0x9e/0x130 kernel/entry/common.c:181
exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:217
__syscall_exit_to_user_mode_work kernel/entry/common.c:299 [inline]
syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:310
do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f023dcbeb19
Code: Unable to access opcode bytes at RIP 0x7f023dcbeaef.
RSP: 002b:00007f023bf15028 EFLAGS: 00000246 ORIG_RAX: 000000000000002f
RAX: 00000000002e4840 RBX: 00007f023df44fa0 RCX: 00007f023dcbeb19
RDX: 0000000040000100 RSI: 0000200000000840 RDI: 000000000000000d
RBP: 00007f023dd56af8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f023df45038 R14: 00007f023df44fa0 R15: 00007fff075e0b08
----------------
Code disassembly (best guess):
0: 28 4d 39 sub %cl,0x39(%rbp)
3: ca 77 22 lret $0x2277
6: 89 ff mov %edi,%edi
8: 89 f6 mov %esi,%esi
a: 4a c7 44 02 08 05 00 movq $0x5,0x8(%rdx,%r8,1)
11: 00 00
13: 4a 89 7c 02 10 mov %rdi,0x10(%rdx,%r8,1)
18: 4a 89 74 02 18 mov %rsi,0x18(%rdx,%r8,1)
1d: 4a 89 44 02 20 mov %rax,0x20(%rdx,%r8,1)
22: 48 ff c1 inc %rcx
25: 48 89 0a mov %rcx,(%rdx)
28: c3 ret
29: 90 nop
* 2a: 48 8b 04 24 mov (%rsp),%rax <-- trapping instruction
2e: 65 48 8b 0d 44 3e 89 mov %gs:0x7e893e44(%rip),%rcx # 0x7e893e7a
35: 7e
36: 65 8b 15 45 3e 89 7e mov %gs:0x7e893e45(%rip),%edx # 0x7e893e82
3d: 81 .byte 0x81
3e: e2 00 loop 0x40