------------[ cut here ]------------
WARNING: CPU: 1 PID: 7460 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 1 PID: 7460 Comm: syz.5.721 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 0d f6 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 90 f2 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:ffffc90000dd00e0 EFLAGS: 00010006
RAX: ffffffff819ed980 RBX: 0000000000000000 RCX: ffff88802a048000
RDX: 0000000000010100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff8eebf048 R09: ffffffff8eebf058
R10: ffffffff8eebf050 R11: ffffffff8eebf043 R12: ffff88802a049788
R13: dffffc0000000000 R14: ffffc90000dd0148 R15: 0000000000000000
FS: 00007fcd01c006c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055557d81c4a8 CR3: 00000000683b3000 CR4: 00000000003506e0
DR0: 0000000000000000 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_1ac23171ae95db47+0x34/0xc3c
bpf_dispatcher_nop_func include/linux/bpf.h:888 [inline]
__bpf_prog_run include/linux/filter.h:621 [inline]
bpf_prog_run include/linux/filter.h:635 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:1878 [inline]
bpf_trace_run2+0x242/0x2d0 kernel/trace/bpf_trace.c:1915
trace_tlb_flush+0xe6/0x110 include/trace/events/tlb.h:38
flush_tlb_func+0x43f/0x510 arch/x86/mm/tlb.c:855
flush_smp_call_function_queue+0x2a9/0x760 kernel/smp.c:628
__sysvec_call_function_single+0x98/0x240 arch/x86/kernel/smp.c:248
instr_sysvec_call_function_single arch/x86/kernel/smp.c:243 [inline]
sysvec_call_function_single+0x4a/0xc0 arch/x86/kernel/smp.c:243
asm_sysvec_call_function_single+0x16/0x20 arch/x86/include/asm/idtentry.h:684
RIP: 0010:bpf_tree_comp kernel/bpf/core.c:610 [inline]
RIP: 0010:__lt_find include/linux/rbtree_latch.h:115 [inline]
RIP: 0010:latch_tree_find include/linux/rbtree_latch.h:208 [inline]
RIP: 0010:bpf_ksym_find kernel/bpf/core.c:692 [inline]
RIP: 0010:is_bpf_text_address+0xfc/0x270 kernel/bpf/core.c:726
Code: f6 0f 84 be 00 00 00 4c 89 2c 24 41 c1 e7 03 47 8d 2c 7f 49 f7 dd 4f 8d bc 2e 60 ff ff ff 4c 89 f8 48 c1 e8 03 42 80 3c 20 00 <74> 08 4c 89 ff e8 da 5c 38 00 4d 8b 3f 4c 89 ff 48 89 de e8 0c f6
RSP: 0000:ffffc90000dd0460 EFLAGS: 00000246
RAX: 1ffff1100f5a7229 RBX: 00007fcd03999749 RCX: ffff88802a048000
RDX: 0000000000000100 RSI: 00007fcd03999749 RDI: ffffffffa002a000
RBP: 0000000000000001 R08: dffffc0000000000 R09: fffffbfff1ff5419
R10: fffffbfff1ff5419 R11: 1ffffffff1ff5418 R12: dffffc0000000000
R13: 0000000000000000 R14: ffff88807ad391e8 R15: ffff88807ad39148
kernel_text_address kernel/extable.c:151 [inline]
__kernel_text_address+0x9a/0x100 kernel/extable.c:105
unwind_get_return_address+0x49/0x80 arch/x86/kernel/unwind_orc.c:323
arch_stack_walk+0xf2/0x140 arch/x86/kernel/stacktrace.c:26
stack_trace_save+0x98/0xe0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track mm/kasan/common.c:46 [inline]
set_alloc_info mm/kasan/common.c:434 [inline]
__kasan_slab_alloc+0x9c/0xd0 mm/kasan/common.c:467
kasan_slab_alloc include/linux/kasan.h:254 [inline]
slab_post_alloc_hook+0x4c/0x380 mm/slab.h:519
slab_alloc_node mm/slub.c:3225 [inline]
kmem_cache_alloc_node+0x12d/0x2d0 mm/slub.c:3261
__alloc_skb+0xf4/0x750 net/core/skbuff.c:415
__netdev_alloc_skb+0x103/0x4a0 net/core/skbuff.c:494
netdev_alloc_skb include/linux/skbuff.h:3024 [inline]
dev_alloc_skb include/linux/skbuff.h:3037 [inline]
hsr_init_skb+0xdc/0x580 net/hsr/hsr_device.c:269
send_hsr_supervision_frame+0x13c/0xb80 net/hsr/hsr_device.c:312
hsr_announce+0x162/0x300 net/hsr/hsr_device.c:405
call_timer_fn+0x16c/0x530 kernel/time/timer.c:1451
expire_timers kernel/time/timer.c:1496 [inline]
__run_timers+0x525/0x7c0 kernel/time/timer.c:1767
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1780
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
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:__should_failslab+0x8f/0xe0 mm/failslab.c:33
Code: 8d 73 08 4c 89 f0 48 c1 e8 03 42 0f b6 04 38 84 c0 75 45 41 f6 46 03 02 74 d3 48 83 c3 1c 48 89 d8 48 c1 e8 03 42 0f b6 04 38 <84> c0 75 14 8b 33 48 c7 c7 e0 10 1f 8c 5b 41 5e 41 5f 5d e9 09 98
RSP: 0000:ffffc90004657968 EFLAGS: 00000a07
RAX: 0000000000000000 RBX: ffff88814cc408dc RCX: 043d3eacb40dff00
RDX: ffff88802a048000 RSI: 0000000000000cc0 RDI: ffff88814cc408c0
RBP: 0000000000000cc0 R08: dffffc0000000000 R09: fffffbfff1ad26b6
R10: fffffbfff1ad26b6 R11: 1ffffffff1ad26b5 R12: ffff8880631bc108
R13: 1ffff1100c637830 R14: ffff88814cc408c0 R15: dffffc0000000000
should_failslab+0x5/0x20 mm/slab_common.c:1350
slab_pre_alloc_hook+0x51/0xc0 mm/slab.h:494
slab_alloc_node mm/slub.c:3139 [inline]
slab_alloc mm/slub.c:3233 [inline]
kmem_cache_alloc+0x3d/0x290 mm/slub.c:3238
alloc_pid+0x9b/0xac0 kernel/pid.c:180
copy_process+0x1a52/0x3e00 kernel/fork.c:2306
kernel_clone+0x219/0x930 kernel/fork.c:2679
__do_sys_clone kernel/fork.c:2796 [inline]
__se_sys_clone kernel/fork.c:2780 [inline]
__x64_sys_clone+0x170/0x1c0 kernel/fork.c:2780
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: 0033:0x7fcd03999749
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:00007fcd01bfffe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007fcd03beffa0 RCX: 00007fcd03999749
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000011
RBP: 00007fcd03a1df91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007fcd03bf0038 R14: 00007fcd03beffa0 R15: 00007ffdaf6f3938
----------------
Code disassembly (best guess):
0: f6 0f 84 testb $0x84,(%rdi)
3: be 00 00 00 4c mov $0x4c000000,%esi
8: 89 2c 24 mov %ebp,(%rsp)
b: 41 c1 e7 03 shl $0x3,%r15d
f: 47 8d 2c 7f lea (%r15,%r15,2),%r13d
13: 49 f7 dd neg %r13
16: 4f 8d bc 2e 60 ff ff lea -0xa0(%r14,%r13,1),%r15
1d: ff
1e: 4c 89 f8 mov %r15,%rax
21: 48 c1 e8 03 shr $0x3,%rax
25: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1)
* 2a: 74 08 je 0x34 <-- trapping instruction
2c: 4c 89 ff mov %r15,%rdi
2f: e8 da 5c 38 00 call 0x385d0e
34: 4d 8b 3f mov (%r15),%r15
37: 4c 89 ff mov %r15,%rdi
3a: 48 89 de mov %rbx,%rsi
3d: e8 .byte 0xe8
3e: 0c f6 or $0xf6,%al