------------[ cut here ]------------
WARNING: CPU: 1 PID: 1943 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 1 PID: 1943 Comm: kworker/u4:10 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Code: 24 45 31 f6 31 ff 89 de e8 7d 94 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 91 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: ffffffff81a08ea0 RBX: 0000000000000000 RCX: ffff88804b5bd940
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffc90000dd02f7 R09: ffffc90000dd02c4
R10: dffffc0000000000 R11: fffff520001ba05f R12: ffff88804b5bf0c8
R13: ffffc900011ce030 R14: ffffc90000dcff28 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2965797ff8 CR3: 0000000040948000 CR4: 00000000003506e0
DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff3 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+0x32/0xa84
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:3243 [inline]
netdev_pick_tx+0x335/0xad0 net/core/dev.c:4140
netdev_core_pick_tx+0x12e/0x2e0 net/core/dev.c:4173
__dev_queue_xmit+0x756/0x2fd0 net/core/dev.c:4248
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:1451
expire_timers kernel/time/timer.c:1496 [inline]
__run_timers+0x53a/0x7f0 kernel/time/timer.c:1767
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1780
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:mm_init_owner kernel/fork.c:1030 [inline]
RIP: 0010:mm_init+0x2d4/0x840 kernel/fork.c:1069
Code: e8 f1 28 77 00 48 c7 83 d0 05 00 00 00 00 00 00 48 8d bb d8 05 00 00 48 89 f8 48 c1 e8 03 42 80 3c 28 00 74 05 e8 cc 28 77 00 <4c> 89 bb d8 05 00 00 48 8d bb 70 06 00 00 48 89 f8 48 c1 e8 03 42
RSP: 0018:ffffc900031efdc8 EFLAGS: 00000246
RAX: 1ffff110057f127b RBX: ffff88802bf88e00 RCX: dffffc0000000000
RDX: 0000000000000010 RSI: 0000000000000000 RDI: ffff88802bf893d8
RBP: 00000000ffffff9c R08: ffff88802bf893bf R09: ffff88802bf893b0
R10: dffffc0000000000 R11: ffffed10057f1278 R12: ffff88802bf88f80
R13: dffffc0000000000 R14: ffffffff8c1cc7c0 R15: ffff88804b5bd940
bprm_mm_init fs/exec.c:366 [inline]
alloc_bprm+0x1a9/0x6a0 fs/exec.c:1536
kernel_execve+0x49/0x900 fs/exec.c:1978
call_usermodehelper_exec_async+0x207/0x350 kernel/umh.c:112
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
----------------
Code disassembly (best guess):
0: e8 f1 28 77 00 call 0x7728f6
5: 48 c7 83 d0 05 00 00 movq $0x0,0x5d0(%rbx)
c: 00 00 00 00
10: 48 8d bb d8 05 00 00 lea 0x5d8(%rbx),%rdi
17: 48 89 f8 mov %rdi,%rax
1a: 48 c1 e8 03 shr $0x3,%rax
1e: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1)
23: 74 05 je 0x2a
25: e8 cc 28 77 00 call 0x7728f6
* 2a: 4c 89 bb d8 05 00 00 mov %r15,0x5d8(%rbx) <-- trapping instruction
31: 48 8d bb 70 06 00 00 lea 0x670(%rbx),%rdi
38: 48 89 f8 mov %rdi,%rax
3b: 48 c1 e8 03 shr $0x3,%rax
3f: 42 rex.X