------------[ cut here ]------------
WARNING: CPU: 1 PID: 5862 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 1 PID: 5862 Comm: rm Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Code: 24 45 31 f6 31 ff 89 de e8 7d 90 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 8d 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: 0000:ffffc90000dcfec8 EFLAGS: 00010246
RAX: ffffffff81a0a790 RBX: 0000000000000000 RCX: ffff8880200f0000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffc90000dd02f7 R09: ffffc90000dd02c4
R10: dffffc0000000000 R11: fffff520001ba05f R12: ffff8880200f1788
R13: ffffc900011ed030 R14: ffffc90000dcff28 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2fdca50878 CR3: 000000007d2c9000 CR4: 00000000003506e0
DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000200000000300
DR3: 0000200000000300 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+0x32/0x4f8
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_prog_run_pin_on_cpu include/linux/filter.h:652 [inline]
bpf_flow_dissect+0x12b/0x3f0 net/core/flow_dissector.c:896
__skb_flow_dissect+0x792/0x60b0 net/core/flow_dissector.c:1024
skb_flow_dissect_flow_keys include/linux/skbuff.h:1390 [inline]
___skb_get_hash+0x55/0x680 net/core/flow_dissector.c:1583
__skb_get_hash+0xd2/0x270 net/core/flow_dissector.c:1648
skb_get_hash include/linux/skbuff.h:1432 [inline]
skb_tx_hash net/core/dev.c:3256 [inline]
netdev_pick_tx+0x335/0xad0 net/core/dev.c:4153
netdev_core_pick_tx+0x12e/0x2e0 net/core/dev.c:4186
__dev_queue_xmit+0x756/0x2f80 net/core/dev.c:4261
hsr_xmit net/hsr/hsr_forward.c:340 [inline]
hsr_forward_do net/hsr/hsr_forward.c:431 [inline]
hsr_forward_skb+0xfd2/0x1700 net/hsr/hsr_forward.c:584
send_hsr_supervision_frame+0x5f7/0xb80 net/hsr/hsr_device.c:349
hsr_announce+0x168/0x310 net/hsr/hsr_device.c:405
call_timer_fn+0x17b/0x540 kernel/time/timer.c:1648
expire_timers kernel/time/timer.c:1699 [inline]
__run_timers+0x53e/0x800 kernel/time/timer.c:1970
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1983
handle_softirqs+0x339/0x830 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:instrument_atomic_read include/linux/instrumented.h:71 [inline]
RIP: 0010:atomic_read include/linux/atomic/atomic-instrumented.h:27 [inline]
RIP: 0010:lock_page_memcg+0x23d/0x440 mm/memcontrol.c:2062
Code: 00 00 9c 8f 44 24 40 f7 44 24 40 00 02 00 00 c6 44 01 04 f8 0f 85 f9 00 00 00 f7 c3 00 02 00 00 74 01 fb 4d 8d af 80 10 00 00 <4c> 89 ef be 04 00 00 00 e8 36 8f fb ff 4c 89 e8 48 c1 e8 03 48 b9
RSP: 0000:ffffc9000300f9c0 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 0000000000000286 RCX: 1ffff92000601f3c
RDX: dffffc0000000000 RSI: ffffffff8a2b2800 RDI: ffffffff8a79fe40
RBP: ffffc9000300fa90 R08: ffffffff901d50c7 R09: 1ffffffff203aa18
R10: dffffc0000000000 R11: fffffbfff203aa19 R12: ffff888016e7c670
R13: ffff888016e7d080 R14: ffffea00002876f8 R15: ffff888016e7c000
page_add_file_rmap+0x185/0x940 mm/rmap.c:1219
do_set_pte+0x3c9/0x530 mm/memory.c:4069
filemap_map_pages+0xea1/0x13b0 mm/filemap.c:3344
do_fault_around mm/memory.c:4243 [inline]
do_read_fault mm/memory.c:4258 [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+0x25bc/0x4410 mm/memory.c:4883
do_user_addr_fault+0x489/0xc80 arch/x86/mm/fault.c:1355
handle_page_fault arch/x86/mm/fault.c:1443 [inline]
exc_page_fault+0x60/0x100 arch/x86/mm/fault.c:1496
asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:606
RIP: 0033:0x7f2fdcd628f4
Code: 10 48 29 d7 eb 24 8b 4a 04 48 83 c0 13 48 83 e0 f8 48 8d 44 08 07 48 83 e0 f8 48 01 c2 48 8d 04 3a 4c 39 c0 0f 83 f4 00 00 00 <8b> 02 83 f8 04 75 d5 83 7a 08 05 75 cf 81 7a 0c 47 4e 55 00 75 c6
RSP: 002b:00007ffe23ed94b8 EFLAGS: 00010283
RAX: 00007f2fdc9f1190 RBX: 00007f2fdc9f1190 RCX: 000000000000000a
RDX: 00007f2fdca50878 RSI: 00007f2fdca5d6b0 RDI: ffff80d0235af794
RBP: 00007ffe23ed9610 R08: 0000000000000030 R09: 00000000effffef5
R10: 0000000070000029 R11: 00007ffe23ed96f8 R12: 0000000000000003
R13: 00007f2fdca5d6b0 R14: 00007ffe23ed96b0 R15: 00007f2fdca52018
----------------
Code disassembly (best guess):
0: 00 00 add %al,(%rax)
2: 9c pushf
3: 8f 44 24 40 pop 0x40(%rsp)
7: f7 44 24 40 00 02 00 testl $0x200,0x40(%rsp)
e: 00
f: c6 44 01 04 f8 movb $0xf8,0x4(%rcx,%rax,1)
14: 0f 85 f9 00 00 00 jne 0x113
1a: f7 c3 00 02 00 00 test $0x200,%ebx
20: 74 01 je 0x23
22: fb sti
23: 4d 8d af 80 10 00 00 lea 0x1080(%r15),%r13
* 2a: 4c 89 ef mov %r13,%rdi <-- trapping instruction
2d: be 04 00 00 00 mov $0x4,%esi
32: e8 36 8f fb ff call 0xfffb8f6d
37: 4c 89 e8 mov %r13,%rax
3a: 48 c1 e8 03 shr $0x3,%rax
3e: 48 rex.W
3f: b9 .byte 0xb9