------------[ cut here ]------------
WARNING: CPU: 0 PID: 5660 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 0 PID: 5660 Comm: syz.3.398 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:ffffc900000079d8 EFLAGS: 00010246
RAX: ffffffff819ed760 RBX: 0000000000000008 RCX: ffff888022043b80
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: ffffed1004408771
R10: ffffed1004408771 R11: 1ffff11004408770 R12: ffff888022045308
R13: 00007ffffffff000 R14: ffffc90000007a48 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000000be8e000 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+0x35/0xe48
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
trace_kfree include/trace/events/kmem.h:118 [inline]
kfree+0x25f/0x2a0 mm/slub.c:4554
deferred_put_nlk_sk+0x3f/0xe0 net/netlink/af_netlink.c:715
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:unwind_next_frame+0x1179/0x1d90 arch/x86/kernel/unwind_orc.c:608
Code: 48 01 c6 48 89 df 4c 89 fa e8 33 0c 00 00 84 c0 0f 84 b4 03 00 00 49 bd 00 00 00 00 00 fc ff df 48 8b 44 24 48 42 0f b6 04 28 <84> c0 0f 85 30 08 00 00 8b 44 24 7c 39 03 0f 85 ff 00 00 00 48 8b
RSP: 0018:ffffc9000399eda8 EFLAGS: 00000202
RAX: 0000000000000000 RBX: ffffc9000399ee68 RCX: 0000000000000001
RDX: ffffc9000399eea8 RSI: ffffc9000399f970 RDI: ffffc9000399f970
RBP: ffffc9000399eeb0 R08: dffffc0000000000 R09: ffffc9000399eeb8
R10: fffff52000733dd9 R11: 1ffff92000733dd7 R12: 1ffffffff1bdf134
R13: dffffc0000000000 R14: ffffc9000399eeb8 R15: ffffffff8def89a0
arch_stack_walk+0x10c/0x140 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x98/0xe0 kernel/stacktrace.c:122
save_stack+0xf3/0x1e0 mm/page_owner.c:119
__reset_page_owner+0x51/0x180 mm/page_owner.c:140
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1340 [inline]
free_pcp_prepare mm/page_alloc.c:1391 [inline]
free_unref_page_prepare+0x637/0x6c0 mm/page_alloc.c:3317
free_unref_page_list+0x122/0x7e0 mm/page_alloc.c:3433
release_pages+0x184b/0x1bb0 mm/swap.c:963
__pagevec_release+0x6d/0xe0 mm/swap.c:983
pagevec_release include/linux/pagevec.h:81 [inline]
shmem_undo_range+0x5cb/0x1880 mm/shmem.c:964
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
exit_task_work include/linux/task_work.h:33 [inline]
do_exit+0x61e/0x20a0 kernel/exit.c:883
do_group_exit+0x12e/0x300 kernel/exit.c:997
get_signal+0x6ca/0x12c0 kernel/signal.c:2900
arch_do_signal_or_restart+0xc1/0x1300 arch/x86/kernel/signal.c:867
handle_signal_work kernel/entry/common.c:154 [inline]
exit_to_user_mode_loop+0x9e/0x130 kernel/entry/common.c:178
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: 0033:0x7f9b9785cc29
Code: Unable to access opcode bytes at RIP 0x7f9b9785cbff.
RSP: 002b:00007f9b95aa3038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: 0000000000010106 RBX: 00007f9b97aa4090 RCX: 00007f9b9785cc29
RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000004
RBP: 00007f9b978dfe41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9b97aa4128 R14: 00007f9b97aa4090 R15: 00007ffef9c6f048
----------------
Code disassembly (best guess):
0: 48 01 c6 add %rax,%rsi
3: 48 89 df mov %rbx,%rdi
6: 4c 89 fa mov %r15,%rdx
9: e8 33 0c 00 00 call 0xc41
e: 84 c0 test %al,%al
10: 0f 84 b4 03 00 00 je 0x3ca
16: 49 bd 00 00 00 00 00 movabs $0xdffffc0000000000,%r13
1d: fc ff df
20: 48 8b 44 24 48 mov 0x48(%rsp),%rax
25: 42 0f b6 04 28 movzbl (%rax,%r13,1),%eax
* 2a: 84 c0 test %al,%al <-- trapping instruction
2c: 0f 85 30 08 00 00 jne 0x862
32: 8b 44 24 7c mov 0x7c(%rsp),%eax
36: 39 03 cmp %eax,(%rbx)
38: 0f 85 ff 00 00 00 jne 0x13d
3e: 48 rex.W
3f: 8b .byte 0x8b