------------[ cut here ]------------
WARNING: CPU: 0 PID: 4500 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 0 PID: 4500 Comm: syz.3.69 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
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:ffffc900000079f8 EFLAGS: 00010246
RAX: ffffffff819ed760 RBX: 0000000000000008 RCX: ffff8880208d9dc0
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: ffffed100411b3b9
R10: ffffed100411b3b9 R11: 1ffff1100411b3b8 R12: ffff8880208db548
R13: 00007ffffffff000 R14: ffffc90000007a68 R15: 0000000000000000
FS: 00007f45467626c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000004c68f000 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_2f48b2f54611f152+0x60/0x958
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_run3+0x17e/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
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:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:202
Code: f6 ff 0f 1f 00 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 3e 1d aa f7 48 89 df e8 06 f2 aa f7 e8 c1 8c cb f7 fb bf 01 00 00 00 46 15 9f f7 65 8b 05 27 13 50 76 85 c0 74 02 5b c3 e8 d4 1d 4e
RSP: 0018:ffffc9000345f7f0 EFLAGS: 00000286
RAX: 638784b06cfb8c00 RBX: ffff88804dc260a0 RCX: 638784b06cfb8c00
RDX: dffffc0000000000 RSI: ffffffff8a0b1820 RDI: 0000000000000001
RBP: dffffc0000000000 R08: dffffc0000000000 R09: ffffed1009b84c15
R10: ffffed1009b84c15 R11: 1ffff11009b84c14 R12: 00fff00000080035
R13: 0000000000000000 R14: ffff88804dc26098 R15: ffff88804dc260a0
spin_unlock_irq include/linux/spinlock.h:413 [inline]
delete_from_page_cache+0x129/0x190 mm/filemap.c:267
truncate_inode_page+0x8d/0xb0 mm/truncate.c:219
shmem_undo_range+0x4dc/0x1880 mm/shmem.c:960
shmem_truncate_range mm/shmem.c:1063 [inline]
shmem_evict_inode+0x20d/0xa00 mm/shmem.c:1145
evict+0x485/0x870 fs/inode.c:647
__dentry_kill+0x431/0x650 fs/dcache.c:586
dentry_kill+0xb8/0x290 fs/dcache.c:-1
dput+0xd8/0x1a0 fs/dcache.c:893
__fput+0x5ee/0x930 fs/file_table.c:319
task_work_run+0x125/0x1a0 kernel/task_work.c:188
tracehook_notify_resume include/linux/tracehook.h:189 [inline]
exit_to_user_mode_loop+0x10f/0x130 kernel/entry/common.c:181
exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:214
__syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307
do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f45484fac29
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:00007f4546762038 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: 0000200000000000 RBX: 00007f4548741fa0 RCX: 00007f45484fac29
RDX: 0000000000000002 RSI: 0000000000ff5000 RDI: 0000200000000000
RBP: 00007f454857de41 R08: ffffffffffffffff R09: 0000000000000000
R10: 000000000004c831 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4548742038 R14: 00007f4548741fa0 R15: 00007ffdd1cdf3e8
----------------
Code disassembly (best guess):
0: f6 ff idiv %bh
2: 0f 1f 00 nopl (%rax)
5: 53 push %rbx
6: 48 89 fb mov %rdi,%rbx
9: 48 83 c7 18 add $0x18,%rdi
d: 48 8b 74 24 08 mov 0x8(%rsp),%rsi
12: e8 3e 1d aa f7 call 0xf7aa1d55
17: 48 89 df mov %rbx,%rdi
1a: e8 06 f2 aa f7 call 0xf7aaf225
1f: e8 c1 8c cb f7 call 0xf7cb8ce5
24: fb sti
25: bf 01 00 00 00 mov $0x1,%edi
* 2a: e8 46 15 9f f7 call 0xf79f1575 <-- trapping instruction
2f: 65 8b 05 27 13 50 76 mov %gs:0x76501327(%rip),%eax # 0x7650135d
36: 85 c0 test %eax,%eax
38: 74 02 je 0x3c
3a: 5b pop %rbx
3b: c3 ret
3c: e8 .byte 0xe8
3d: d4 (bad)
3e: 1d .byte 0x1d
3f: 4e rex.WRX