------------[ cut here ]------------
WARNING: CPU: 0 PID: 4538 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 0 PID: 4538 Comm: dhcpcd-run-hook Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Code: 24 45 31 f6 31 ff 89 de e8 3d 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 c0 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:ffffc90000007978 EFLAGS: 00010246
RAX: ffffffff819ed760 RBX: 0000000000000008 RCX: ffff888025681dc0
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: ffffed1004ad03b9
R10: ffffed1004ad03b9 R11: 1ffff11004ad03b8 R12: ffff888025683548
R13: 00007ffffffff000 R14: ffffc900000079e8 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000002a523000 CR4: 00000000003506f0
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_compat kernel/trace/bpf_trace.c:281 [inline]
bpf_probe_read_compat+0xdd/0x170 kernel/trace/bpf_trace.c:277
bpf_prog_ee60aafa828f4cb7+0x35/0x2cc
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_run2+0x15b/0x2d0 kernel/trace/bpf_trace.c:1915
__bpf_trace_kfree+0x6e/0x90 include/trace/events/kmem.h:118
__traceiter_kfree+0x26/0x40 include/trace/events/kmem.h:118
trace_kfree include/trace/events/kmem.h:118 [inline]
kfree+0x25f/0x2a0 mm/slub.c:4554
security_cred_free+0xbc/0xf0 security/security.c:1719
put_cred_rcu+0xdd/0x3e0 kernel/cred.c:115
rcu_do_batch kernel/rcu/tree.c:2523 [inline]
rcu_core+0x962/0x15d0 kernel/rcu/tree.c:2763
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:rcu_preempt_read_exit kernel/rcu/tree_plugin.h:380 [inline]
RIP: 0010:__rcu_read_unlock+0x22/0xd0 kernel/rcu/tree_plugin.h:419
Code: df e8 52 d8 57 00 eb d9 41 57 41 56 41 55 41 54 53 49 bf 00 00 00 00 00 fc ff df 65 48 8b 3d d5 14 9e 7e 48 8d 9f 3c 04 00 00 <49> 89 dc 49 c1 ec 03 43 0f b6 04 3c 84 c0 75 48 ff 0b 75 1d 4c 8d
RSP: 0018:ffffc900041bf990 EFLAGS: 00000293
RAX: ffffffff81817800 RBX: ffff8880256821fc RCX: ffff888025681dc0
RDX: 0000000000000000 RSI: ffffffff8a59a460 RDI: ffff888025681dc0
RBP: ffffc900041bfa80 R08: dffffc0000000000 R09: fffffbfff1ff7819
R10: fffffbfff1ff7819 R11: 1ffffffff1ff7818 R12: dffffc0000000000
R13: 1ffff92000837f38 R14: ffffc900011a6048 R15: dffffc0000000000
rcu_read_unlock include/linux/rcupdate.h:771 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:1879 [inline]
bpf_trace_run3+0x1fd/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
remove_vma mm/mmap.c:188 [inline]
remove_vma_list mm/mmap.c:2628 [inline]
__do_munmap+0xc54/0xdc0 mm/mmap.c:2902
do_munmap mm/mmap.c:2910 [inline]
munmap_vma_range mm/mmap.c:603 [inline]
__mmap_region mm/mmap.c:1757 [inline]
mmap_region+0x8bb/0x1660 mm/mmap.c:2933
do_mmap+0x81f/0xea0 mm/mmap.c:1586
vm_mmap_pgoff+0x1b2/0x2b0 mm/util.c:551
ksys_mmap_pgoff+0x542/0x780 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: 0033:0x7f7114c29242
Code: 08 00 04 00 00 eb e2 90 41 f7 c1 ff 0f 00 00 75 27 55 89 cd 53 48 89 fb 48 85 ff 74 33 41 89 ea 48 89 df b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 5e 5b 5d c3 0f 1f 00 c7 05 46 40 01 00 16 00
RSP: 002b:00007ffd0b362c28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f7114905000 RCX: 00007f7114c29242
RDX: 0000000000000003 RSI: 0000000000002000 RDI: 00007f7114905000
RBP: 0000000000000812 R08: 0000000000000003 R09: 0000000000006000
R10: 0000000000000812 R11: 0000000000000206 R12: 00007ffd0b362ce8
R13: 00007f71149080c0 R14: 00007ffd0b363060 R15: 00000fffa166c588
----------------
Code disassembly (best guess):
0: df e8 fucomip %st(0),%st
2: 52 push %rdx
3: d8 57 00 fcoms 0x0(%rdi)
6: eb d9 jmp 0xffffffe1
8: 41 57 push %r15
a: 41 56 push %r14
c: 41 55 push %r13
e: 41 54 push %r12
10: 53 push %rbx
11: 49 bf 00 00 00 00 00 movabs $0xdffffc0000000000,%r15
18: fc ff df
1b: 65 48 8b 3d d5 14 9e mov %gs:0x7e9e14d5(%rip),%rdi # 0x7e9e14f8
22: 7e
23: 48 8d 9f 3c 04 00 00 lea 0x43c(%rdi),%rbx
* 2a: 49 89 dc mov %rbx,%r12 <-- trapping instruction
2d: 49 c1 ec 03 shr $0x3,%r12
31: 43 0f b6 04 3c movzbl (%r12,%r15,1),%eax
36: 84 c0 test %al,%al
38: 75 48 jne 0x82
3a: ff 0b decl (%rbx)
3c: 75 1d jne 0x5b
3e: 4c rex.WR
3f: 8d .byte 0x8d