------------[ cut here ]------------
WARNING: CPU: 1 PID: 4697 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 1 PID: 4697 Comm: dhcpcd-run-hook 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: 0018:ffffc90000dd0a58 EFLAGS: 00010246
RAX: ffffffff819ed980 RBX: 0000000000000002 RCX: ffff888021cb1dc0
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: ffffed10043963b9
R10: ffffed10043963b9 R11: 1ffff110043963b8 R12: ffff888021cb3548
R13: 00007ffffffff000 R14: ffffc90000dd0ac8 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000036bb9000 CR4: 00000000003506e0
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_1f2e894253ad50c0+0x35/0x424
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
__bio_chain_endio block/bio.c:315 [inline]
bio_endio+0x3f/0x750 block/bio.c:1467
req_bio_endio block/blk-core.c:261 [inline]
blk_update_request+0x876/0x1200 block/blk-core.c:1441
scsi_end_request+0x84/0x980 drivers/scsi/scsi_lib.c:544
scsi_io_completion+0x173/0x480 drivers/scsi/scsi_lib.c:940
blk_complete_reqs block/blk-mq.c:587 [inline]
blk_done_softirq+0xfa/0x140 block/blk-mq.c:592
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
common_interrupt+0xb5/0xd0 arch/x86/kernel/irq.c:242
asm_common_interrupt+0x22/0x40 arch/x86/include/asm/idtentry.h:667
RIP: 0010:timestamp_truncate fs/inode.c:-1 [inline]
RIP: 0010:current_time+0x183/0x2b0 fs/inode.c:2398
Code: 80 3c 2c 00 74 08 4c 89 f7 e8 b9 98 ee ff 4d 8b 26 48 89 df 4c 89 e6 e8 eb 31 aa ff 4c 39 e3 0f 84 01 01 00 00 e8 fd 2f aa ff <4c> 8b 64 24 18 4c 8b 74 24 10 bf 01 00 00 00 44 89 f6 e8 46 33 aa
RSP: 0018:ffffc9000301f5c0 EFLAGS: 00000293
RAX: ffffffff81cd9c13 RBX: 000000006938925a RCX: ffff888021cb1dc0
RDX: 0000000000000000 RSI: ffffffff80000000 RDI: 000000006938925a
RBP: ffffc9000301f678 R08: dffffc0000000000 R09: fffffbfff1ad26b6
R10: fffffbfff1ad26b6 R11: 1ffffffff1ad26b5 R12: ffffffff80000000
R13: dffffc0000000000 R14: ffff88802d366688 R15: 0000000021019fd9
atime_needs_update+0x3fd/0x780 fs/inode.c:1931
pick_link+0x487/0xdc0 fs/namei.c:1762
step_into+0xae9/0xd00 fs/namei.c:1840
link_path_walk+0x662/0xd40 fs/namei.c:-1
path_openat+0x27d/0x2f30 fs/namei.c:3746
do_filp_open+0x1b3/0x3e0 fs/namei.c:3777
do_sys_openat2+0x142/0x4a0 fs/open.c:1255
do_sys_open fs/open.c:1271 [inline]
__do_sys_openat fs/open.c:1287 [inline]
__se_sys_openat fs/open.c:1282 [inline]
__x64_sys_openat+0x135/0x160 fs/open.c:1282
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: 0033:0x7f670d4e50ba
Code: 41 89 f2 48 89 54 24 e0 41 83 e2 40 75 2a 89 f0 f7 d0 a9 00 00 41 00 74 1f 89 f2 b8 01 01 00 00 48 89 fe bf 9c ff ff ff 0f 05 <48> 3d 00 f0 ff ff 77 2e c3 0f 1f 44 00 00 48 8d 44 24 08 c7 44 24
RSP: 002b:00007ffeb0f459f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007ffeb0f45a70 RCX: 00007f670d4e50ba
RDX: 0000000000080000 RSI: 00007ffeb0f45a70 RDI: 00000000ffffff9c
RBP: 00007ffeb0f45a60 R08: 00007ffeb0f45c67 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000033
R13: 00007f670d4c1000 R14: 00007ffeb0f45c80 R15: 0000000000000000
----------------
Code disassembly (best guess):
0: 80 3c 2c 00 cmpb $0x0,(%rsp,%rbp,1)
4: 74 08 je 0xe
6: 4c 89 f7 mov %r14,%rdi
9: e8 b9 98 ee ff call 0xffee98c7
e: 4d 8b 26 mov (%r14),%r12
11: 48 89 df mov %rbx,%rdi
14: 4c 89 e6 mov %r12,%rsi
17: e8 eb 31 aa ff call 0xffaa3207
1c: 4c 39 e3 cmp %r12,%rbx
1f: 0f 84 01 01 00 00 je 0x126
25: e8 fd 2f aa ff call 0xffaa3027
* 2a: 4c 8b 64 24 18 mov 0x18(%rsp),%r12 <-- trapping instruction
2f: 4c 8b 74 24 10 mov 0x10(%rsp),%r14
34: bf 01 00 00 00 mov $0x1,%edi
39: 44 89 f6 mov %r14d,%esi
3c: e8 .byte 0xe8
3d: 46 rex.RX
3e: 33 .byte 0x33
3f: aa stos %al,%es:(%rdi)