------------[ cut here ]------------
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.3.55/4460 is trying to acquire lock:
ffffffff8c1110c0 (console_owner){..-.}-{0:0}, at: console_lock_spinning_enable+0x2c/0x60 kernel/printk/printk.c:1802
but task is already holding lock:
ffff8880b91280d8 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x123/0x270 kernel/time/timer.c:946
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #5 (&base->lock){-.-.}-{2:2}:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xa4/0xf0 kernel/locking/spinlock.c:162
lock_timer_base+0x123/0x270 kernel/time/timer.c:946
__mod_timer+0x117/0xd20 kernel/time/timer.c:1019
queue_delayed_work_on+0x126/0x1e0 kernel/workqueue.c:1715
psi_enqueue kernel/sched/stats.h:102 [inline]
enqueue_task+0x26d/0x2b0 kernel/sched/core.c:1992
activate_task kernel/sched/core.c:2024 [inline]
wake_up_new_task+0x442/0x9a0 kernel/sched/core.c:4541
kernel_clone+0x421/0x930 kernel/fork.c:2703
kernel_thread+0xc8/0x120 kernel/fork.c:2731
rest_init+0x21/0x330 init/main.c:706
start_kernel+0x486/0x530 init/main.c:1140
secondary_startup_64_no_verify+0xb1/0xbb
-> #4 (&rq->__lock){-.-.}-{2:2}:
_raw_spin_lock_nested+0x2e/0x40 kernel/locking/spinlock.c:368
raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:475
raw_spin_rq_lock kernel/sched/sched.h:1326 [inline]
rq_lock kernel/sched/sched.h:1621 [inline]
task_fork_fair+0x5c/0x350 kernel/sched/fair.c:11499
sched_cgroup_fork+0x2c6/0x320 kernel/sched/core.c:4485
copy_process+0x22d1/0x3e00 kernel/fork.c:2395
kernel_clone+0x219/0x930 kernel/fork.c:2679
kernel_thread+0xc8/0x120 kernel/fork.c:2731
rest_init+0x21/0x330 init/main.c:706
start_kernel+0x486/0x530 init/main.c:1140
secondary_startup_64_no_verify+0xb1/0xbb
-> #3 (&p->pi_lock){-.-.}-{2:2}:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xa4/0xf0 kernel/locking/spinlock.c:162
try_to_wake_up+0x5c/0x1050 kernel/sched/core.c:4049
__wake_up_common+0x2a4/0x4e0 kernel/sched/wait.c:108
__wake_up_common_lock kernel/sched/wait.c:138 [inline]
__wake_up+0x108/0x180 kernel/sched/wait.c:157
tty_port_default_wakeup+0xa5/0xf0 drivers/tty/tty_port.c:51
serial8250_tx_chars+0x629/0x830 drivers/tty/serial/8250/8250_port.c:1828
serial8250_handle_irq+0x519/0x610 drivers/tty/serial/8250/8250_port.c:1924
serial8250_default_handle_irq+0xb4/0x1a0 drivers/tty/serial/8250/8250_port.c:1941
serial8250_interrupt+0x9b/0x1c0 drivers/tty/serial/8250/8250_core.c:127
__handle_irq_event_percpu+0x291/0x9b0 kernel/irq/handle.c:156
handle_irq_event_percpu kernel/irq/handle.c:196 [inline]
handle_irq_event+0xa5/0x220 kernel/irq/handle.c:213
handle_edge_irq+0x243/0xb20 kernel/irq/chip.c:819
generic_handle_irq_desc include/linux/irqdesc.h:158 [inline]
handle_irq arch/x86/kernel/irq.c:233 [inline]
__common_interrupt+0xd7/0x1e0 arch/x86/kernel/irq.c:252
common_interrupt+0xb0/0xd0 arch/x86/kernel/irq.c:242
asm_common_interrupt+0x22/0x40 arch/x86/include/asm/idtentry.h:667
lock_acquire+0x1f2/0x3f0 kernel/locking/lockdep.c:5627
rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:312
rcu_read_lock include/linux/rcupdate.h:739 [inline]
is_bpf_text_address+0x1d/0x270 kernel/bpf/core.c:725
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+0x4b/0x70 mm/kasan/common.c:46
kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360
____kasan_slab_free+0xd5/0x110 mm/kasan/common.c:366
kasan_slab_free include/linux/kasan.h:230 [inline]
slab_free_hook mm/slub.c:1710 [inline]
slab_free_freelist_hook+0xea/0x170 mm/slub.c:1736
slab_free mm/slub.c:3504 [inline]
kfree+0xef/0x2a0 mm/slub.c:4564
tomoyo_realpath_from_path+0x5d8/0x610 security/tomoyo/realpath.c:291
tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
tomoyo_check_open_permission+0x183/0x360 security/tomoyo/file.c:771
security_file_open+0x5e/0xa0 security/security.c:1668
do_dentry_open+0x322/0xf80 fs/open.c:813
do_open fs/namei.c:3608 [inline]
path_openat+0x2682/0x2f30 fs/namei.c:3742
do_filp_open+0x1b3/0x3e0 fs/namei.c:3769
do_sys_openat2+0x142/0x4a0 fs/open.c:1253
do_sys_open fs/open.c:1269 [inline]
__do_sys_openat fs/open.c:1285 [inline]
__se_sys_openat fs/open.c:1280 [inline]
__x64_sys_openat+0x135/0x160 fs/open.c:1280
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
-> #2 (&tty->write_wait){-...}-{2:2}:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xa4/0xf0 kernel/locking/spinlock.c:162
__wake_up_common_lock kernel/sched/wait.c:137 [inline]
__wake_up+0xed/0x180 kernel/sched/wait.c:157
tty_port_default_wakeup+0xa5/0xf0 drivers/tty/tty_port.c:51
serial8250_tx_chars+0x629/0x830 drivers/tty/serial/8250/8250_port.c:1828
serial8250_handle_irq+0x519/0x610 drivers/tty/serial/8250/8250_port.c:1924
serial8250_default_handle_irq+0xb4/0x1a0 drivers/tty/serial/8250/8250_port.c:1941
serial8250_interrupt+0x9b/0x1c0 drivers/tty/serial/8250/8250_core.c:127
__handle_irq_event_percpu+0x291/0x9b0 kernel/irq/handle.c:156
handle_irq_event_percpu kernel/irq/handle.c:196 [inline]
handle_irq_event+0xa5/0x220 kernel/irq/handle.c:213
handle_edge_irq+0x243/0xb20 kernel/irq/chip.c:819
generic_handle_irq_desc include/linux/irqdesc.h:158 [inline]
handle_irq arch/x86/kernel/irq.c:233 [inline]
__common_interrupt+0xd7/0x1e0 arch/x86/kernel/irq.c:252
common_interrupt+0xb0/0xd0 arch/x86/kernel/irq.c:242
asm_common_interrupt+0x22/0x40 arch/x86/include/asm/idtentry.h:667
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline]
_raw_spin_unlock_irqrestore+0xa5/0x100 kernel/locking/spinlock.c:194
spin_unlock_irqrestore include/linux/spinlock.h:418 [inline]
uart_write+0x62f/0x880 drivers/tty/serial/serial_core.c:592
process_output_block drivers/tty/n_tty.c:592 [inline]
n_tty_write+0xd21/0x1210 drivers/tty/n_tty.c:2339
do_tty_write drivers/tty/tty_io.c:1038 [inline]
file_tty_write+0x557/0x910 drivers/tty/tty_io.c:1110
call_write_iter include/linux/fs.h:2172 [inline]
new_sync_write fs/read_write.c:507 [inline]
vfs_write+0x712/0xd00 fs/read_write.c:594
ksys_write+0x14d/0x250 fs/read_write.c:647
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
-> #1 (&port_lock_key){-...}-{2:2}:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xa4/0xf0 kernel/locking/spinlock.c:162
serial8250_console_write+0x170/0xf80 drivers/tty/serial/8250/8250_port.c:3362
call_console_drivers kernel/printk/printk.c:-1 [inline]
console_unlock+0xc86/0x1200 kernel/printk/printk.c:2744
vprintk_emit+0xc0/0x150 kernel/printk/printk.c:2274
_printk+0xcc/0x110 kernel/printk/printk.c:2299
register_console+0x682/0x960 kernel/printk/printk.c:3107
univ8250_console_init+0x41/0x50 drivers/tty/serial/8250/8250_core.c:690
console_init+0x177/0x5d0 kernel/printk/printk.c:3207
start_kernel+0x2f9/0x530 init/main.c:1076
secondary_startup_64_no_verify+0xb1/0xbb
-> #0 (console_owner){..-.}-{0:0}:
check_prev_add kernel/locking/lockdep.c:3053 [inline]
check_prevs_add kernel/locking/lockdep.c:3172 [inline]
validate_chain kernel/locking/lockdep.c:3788 [inline]
__lock_acquire+0x2c33/0x7c60 kernel/locking/lockdep.c:5012
lock_acquire+0x197/0x3f0 kernel/locking/lockdep.c:5623
console_lock_spinning_enable+0x51/0x60 kernel/printk/printk.c:1805
console_unlock+0x9f8/0x1200 kernel/printk/printk.c:2741
vprintk_emit+0xc0/0x150 kernel/printk/printk.c:2274
_printk+0xcc/0x110 kernel/printk/printk.c:2299
report_bug+0x1e5/0x2e0 lib/bug.c:195
handle_bug+0x3a/0x70 arch/x86/kernel/traps.c:239
exc_invalid_op+0x16/0x40 arch/x86/kernel/traps.c:259
asm_exc_invalid_op+0x16/0x20 arch/x86/include/asm/idtentry.h:604
copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
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_63d51858d7cca270+0x3d/0x408
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
trace_timer_start include/trace/events/timer.h:52 [inline]
enqueue_timer+0x394/0x520 kernel/time/timer.c:586
__mod_timer+0x88e/0xd20 kernel/time/timer.c:1060
sk_reset_timer+0x1f/0xb0 net/core/sock.c:3142
tcp_event_new_data_sent+0x20e/0x370 net/ipv4/tcp_output.c:81
tcp_write_xmit+0x192a/0x6590 net/ipv4/tcp_output.c:2714
__tcp_push_pending_frames+0x92/0x250 net/ipv4/tcp_output.c:2892
tcp_push_pending_frames include/net/tcp.h:1916 [inline]
tcp_data_snd_check net/ipv4/tcp_input.c:5572 [inline]
tcp_rcv_established+0xf25/0x1cb0 net/ipv4/tcp_input.c:5983
tcp_v4_do_rcv+0x44b/0x9b0 net/ipv4/tcp_ipv4.c:1731
tcp_v4_rcv+0x268f/0x2cb0 net/ipv4/tcp_ipv4.c:2143
ip_protocol_deliver_rcu+0x3ad/0x770 net/ipv4/ip_input.c:204
ip_local_deliver_finish+0x1d5/0x320 net/ipv4/ip_input.c:231
NF_HOOK+0x2d6/0x360 include/linux/netfilter.h:302
dst_input include/net/dst.h:462 [inline]
ip_sublist_rcv_finish net/ipv4/ip_input.c:577 [inline]
ip_list_rcv_finish net/ipv4/ip_input.c:628 [inline]
ip_sublist_rcv+0xa1f/0xce0 net/ipv4/ip_input.c:636
ip_list_rcv+0x3df/0x430 net/ipv4/ip_input.c:671
__netif_receive_skb_list_ptype net/core/dev.c:5568 [inline]
__netif_receive_skb_list_core+0x574/0x740 net/core/dev.c:5616
__netif_receive_skb_list net/core/dev.c:5668 [inline]
netif_receive_skb_list_internal+0x871/0xb90 net/core/dev.c:5759
gro_normal_list net/core/dev.c:5913 [inline]
napi_complete_done+0x37d/0x830 net/core/dev.c:6651
virtqueue_napi_complete drivers/net/virtio_net.c:357 [inline]
virtnet_poll+0x912/0xef0 drivers/net/virtio_net.c:1624
__napi_poll+0xc0/0x430 net/core/dev.c:7075
napi_poll net/core/dev.c:7142 [inline]
net_rx_action+0x4a8/0x9c0 net/core/dev.c:7232
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
__sanitizer_cov_trace_pc+0x55/0x60 kernel/kcov.c:213
check_reg_arg+0x3a6/0xa50 kernel/bpf/verifier.c:2110
check_helper_call+0x36d3/0x55e0 kernel/bpf/verifier.c:6660
do_check+0x6146/0xeac0 kernel/bpf/verifier.c:11427
do_check_common+0xe67/0x16c0 kernel/bpf/verifier.c:13506
do_check_main kernel/bpf/verifier.c:13569 [inline]
bpf_check+0x31f3/0xf090 kernel/bpf/verifier.c:14140
bpf_prog_load+0x1043/0x1550 kernel/bpf/syscall.c:2354
__sys_bpf+0x4c2/0x670 kernel/bpf/syscall.c:4657
__do_sys_bpf kernel/bpf/syscall.c:4761 [inline]
__se_sys_bpf kernel/bpf/syscall.c:4759 [inline]
__x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:4759
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
other info that might help us debug this:
Chain exists of:
console_owner --> &rq->__lock --> &base->lock
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&base->lock);
lock(&rq->__lock);
lock(&base->lock);
lock(console_owner);
*** DEADLOCK ***
6 locks held by syz.3.55/4460:
#0: ffffffff8c11c660 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x9/0x30 include/linux/rcupdate.h:312
#1: ffffffff8c11c660 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:311
#2: ffff8880746a8ca0 (slock-AF_INET/1){+.-.}-{2:2}, at: tcp_v4_rcv+0x261d/0x2cb0 net/ipv4/tcp_ipv4.c:2137
#3: ffff8880b91280d8 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x123/0x270 kernel/time/timer.c:946
#4: ffffffff8c11c660 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:311
#5: ffffffff8c1111a0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0xa7/0x150 kernel/printk/printk.c:2273
stack backtrace:
CPU: 1 PID: 4460 Comm: syz.3.55 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Call Trace:
dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106
check_noncircular+0x274/0x310 kernel/locking/lockdep.c:2133
check_prev_add kernel/locking/lockdep.c:3053 [inline]
check_prevs_add kernel/locking/lockdep.c:3172 [inline]
validate_chain kernel/locking/lockdep.c:3788 [inline]
__lock_acquire+0x2c33/0x7c60 kernel/locking/lockdep.c:5012
lock_acquire+0x197/0x3f0 kernel/locking/lockdep.c:5623
console_lock_spinning_enable+0x51/0x60 kernel/printk/printk.c:1805
console_unlock+0x9f8/0x1200 kernel/printk/printk.c:2741
vprintk_emit+0xc0/0x150 kernel/printk/printk.c:2274
_printk+0xcc/0x110 kernel/printk/printk.c:2299
report_bug+0x1e5/0x2e0 lib/bug.c:195
handle_bug+0x3a/0x70 arch/x86/kernel/traps.c:239
exc_invalid_op+0x16/0x40 arch/x86/kernel/traps.c:259
asm_exc_invalid_op+0x16/0x20 arch/x86/include/asm/idtentry.h:604
RIP: 0010:copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Code: 24 45 31 f6 31 ff 89 de e8 6d 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 f0 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:ffffc90000dcfa78 EFLAGS: 00010046
RAX: ffffffff819ed660 RBX: 0000000000000008 RCX: ffff88801e055940
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: ffffed1003c0ab29
R10: ffffed1003c0ab29 R11: 1ffff11003c0ab28 R12: ffff88801e0570c8
R13: 00007ffffffff000 R14: ffffc90000dcfae8 R15: 0000000020000000
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_63d51858d7cca270+0x3d/0x408
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
trace_timer_start include/trace/events/timer.h:52 [inline]
enqueue_timer+0x394/0x520 kernel/time/timer.c:586
__mod_timer+0x88e/0xd20 kernel/time/timer.c:1060
sk_reset_timer+0x1f/0xb0 net/core/sock.c:3142
tcp_event_new_data_sent+0x20e/0x370 net/ipv4/tcp_output.c:81
tcp_write_xmit+0x192a/0x6590 net/ipv4/tcp_output.c:2714
__tcp_push_pending_frames+0x92/0x250 net/ipv4/tcp_output.c:2892
tcp_push_pending_frames include/net/tcp.h:1916 [inline]
tcp_data_snd_check net/ipv4/tcp_input.c:5572 [inline]
tcp_rcv_established+0xf25/0x1cb0 net/ipv4/tcp_input.c:5983
tcp_v4_do_rcv+0x44b/0x9b0 net/ipv4/tcp_ipv4.c:1731
tcp_v4_rcv+0x268f/0x2cb0 net/ipv4/tcp_ipv4.c:2143
ip_protocol_deliver_rcu+0x3ad/0x770 net/ipv4/ip_input.c:204
ip_local_deliver_finish+0x1d5/0x320 net/ipv4/ip_input.c:231
NF_HOOK+0x2d6/0x360 include/linux/netfilter.h:302
dst_input include/net/dst.h:462 [inline]
ip_sublist_rcv_finish net/ipv4/ip_input.c:577 [inline]
ip_list_rcv_finish net/ipv4/ip_input.c:628 [inline]
ip_sublist_rcv+0xa1f/0xce0 net/ipv4/ip_input.c:636
ip_list_rcv+0x3df/0x430 net/ipv4/ip_input.c:671
__netif_receive_skb_list_ptype net/core/dev.c:5568 [inline]
__netif_receive_skb_list_core+0x574/0x740 net/core/dev.c:5616
__netif_receive_skb_list net/core/dev.c:5668 [inline]
netif_receive_skb_list_internal+0x871/0xb90 net/core/dev.c:5759
gro_normal_list net/core/dev.c:5913 [inline]
napi_complete_done+0x37d/0x830 net/core/dev.c:6651
virtqueue_napi_complete drivers/net/virtio_net.c:357 [inline]
virtnet_poll+0x912/0xef0 drivers/net/virtio_net.c:1624
__napi_poll+0xc0/0x430 net/core/dev.c:7075
napi_poll net/core/dev.c:7142 [inline]
net_rx_action+0x4a8/0x9c0 net/core/dev.c:7232
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:__sanitizer_cov_trace_pc+0x55/0x60 kernel/kcov.c:214
Code: 2c 8b 91 10 16 00 00 83 fa 02 75 21 48 8b 91 18 16 00 00 48 8b 32 48 8d 7e 01 8b 89 14 16 00 00 48 39 cf 73 08 48 89 44 f2 08 <48> 89 3a c3 0f 1f 80 00 00 00 00 48 8b 04 24 65 48 8b 0d 04 a5 8a
RSP: 0018:ffffc900033fef48 EFLAGS: 00000283
RAX: ffffffff81891756 RBX: ffff888022e4d000 RCX: 0000000000080000
RDX: ffffc9000d029000 RSI: 0000000000000cf3 RDI: 0000000000000cf4
RBP: 0000000000000000 R08: ffff88801e055940 R09: 0000000000000002
R10: 0000000000000007 R11: 0000000000000002 R12: 0000000000000001
R13: 0000000000000002 R14: ffff88805e574000 R15: ffff888022e4d070
check_reg_arg+0x3a6/0xa50 kernel/bpf/verifier.c:2110
check_helper_call+0x36d3/0x55e0 kernel/bpf/verifier.c:6660
do_check+0x6146/0xeac0 kernel/bpf/verifier.c:11427
do_check_common+0xe67/0x16c0 kernel/bpf/verifier.c:13506
do_check_main kernel/bpf/verifier.c:13569 [inline]
bpf_check+0x31f3/0xf090 kernel/bpf/verifier.c:14140
bpf_prog_load+0x1043/0x1550 kernel/bpf/syscall.c:2354
__sys_bpf+0x4c2/0x670 kernel/bpf/syscall.c:4657
__do_sys_bpf kernel/bpf/syscall.c:4761 [inline]
__se_sys_bpf kernel/bpf/syscall.c:4759 [inline]
__x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:4759
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: 0033:0x7f5a8656aec9
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:00007f5a847d2038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f5a867c1fa0 RCX: 00007f5a8656aec9
RDX: 0000000000000090 RSI: 00002000000007c0 RDI: 0000000000000005
RBP: 00007f5a865edf91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5a867c2038 R14: 00007f5a867c1fa0 R15: 00007ffdfa35d578
WARNING: CPU: 1 PID: 4460 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 1 PID: 4460 Comm: syz.3.55 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 6d 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 f0 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:ffffc90000dcfa78 EFLAGS: 00010046
RAX: ffffffff819ed660 RBX: 0000000000000008 RCX: ffff88801e055940
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: ffffed1003c0ab29
R10: ffffed1003c0ab29 R11: 1ffff11003c0ab28 R12: ffff88801e0570c8
R13: 00007ffffffff000 R14: ffffc90000dcfae8 R15: 0000000020000000
FS: 00007f5a847d26c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555624725c8 CR3: 00000000258e1000 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_63d51858d7cca270+0x3d/0x408
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
trace_timer_start include/trace/events/timer.h:52 [inline]
enqueue_timer+0x394/0x520 kernel/time/timer.c:586
__mod_timer+0x88e/0xd20 kernel/time/timer.c:1060
sk_reset_timer+0x1f/0xb0 net/core/sock.c:3142
tcp_event_new_data_sent+0x20e/0x370 net/ipv4/tcp_output.c:81
tcp_write_xmit+0x192a/0x6590 net/ipv4/tcp_output.c:2714
__tcp_push_pending_frames+0x92/0x250 net/ipv4/tcp_output.c:2892
tcp_push_pending_frames include/net/tcp.h:1916 [inline]
tcp_data_snd_check net/ipv4/tcp_input.c:5572 [inline]
tcp_rcv_established+0xf25/0x1cb0 net/ipv4/tcp_input.c:5983
tcp_v4_do_rcv+0x44b/0x9b0 net/ipv4/tcp_ipv4.c:1731
tcp_v4_rcv+0x268f/0x2cb0 net/ipv4/tcp_ipv4.c:2143
ip_protocol_deliver_rcu+0x3ad/0x770 net/ipv4/ip_input.c:204
ip_local_deliver_finish+0x1d5/0x320 net/ipv4/ip_input.c:231
NF_HOOK+0x2d6/0x360 include/linux/netfilter.h:302
dst_input include/net/dst.h:462 [inline]
ip_sublist_rcv_finish net/ipv4/ip_input.c:577 [inline]
ip_list_rcv_finish net/ipv4/ip_input.c:628 [inline]
ip_sublist_rcv+0xa1f/0xce0 net/ipv4/ip_input.c:636
ip_list_rcv+0x3df/0x430 net/ipv4/ip_input.c:671
__netif_receive_skb_list_ptype net/core/dev.c:5568 [inline]
__netif_receive_skb_list_core+0x574/0x740 net/core/dev.c:5616
__netif_receive_skb_list net/core/dev.c:5668 [inline]
netif_receive_skb_list_internal+0x871/0xb90 net/core/dev.c:5759
gro_normal_list net/core/dev.c:5913 [inline]
napi_complete_done+0x37d/0x830 net/core/dev.c:6651
virtqueue_napi_complete drivers/net/virtio_net.c:357 [inline]
virtnet_poll+0x912/0xef0 drivers/net/virtio_net.c:1624
__napi_poll+0xc0/0x430 net/core/dev.c:7075
napi_poll net/core/dev.c:7142 [inline]
net_rx_action+0x4a8/0x9c0 net/core/dev.c:7232
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:__sanitizer_cov_trace_pc+0x55/0x60 kernel/kcov.c:214
Code: 2c 8b 91 10 16 00 00 83 fa 02 75 21 48 8b 91 18 16 00 00 48 8b 32 48 8d 7e 01 8b 89 14 16 00 00 48 39 cf 73 08 48 89 44 f2 08 <48> 89 3a c3 0f 1f 80 00 00 00 00 48 8b 04 24 65 48 8b 0d 04 a5 8a
RSP: 0018:ffffc900033fef48 EFLAGS: 00000283
RAX: ffffffff81891756 RBX: ffff888022e4d000 RCX: 0000000000080000
RDX: ffffc9000d029000 RSI: 0000000000000cf3 RDI: 0000000000000cf4
RBP: 0000000000000000 R08: ffff88801e055940 R09: 0000000000000002
R10: 0000000000000007 R11: 0000000000000002 R12: 0000000000000001
R13: 0000000000000002 R14: ffff88805e574000 R15: ffff888022e4d070
check_reg_arg+0x3a6/0xa50 kernel/bpf/verifier.c:2110
check_helper_call+0x36d3/0x55e0 kernel/bpf/verifier.c:6660
do_check+0x6146/0xeac0 kernel/bpf/verifier.c:11427
do_check_common+0xe67/0x16c0 kernel/bpf/verifier.c:13506
do_check_main kernel/bpf/verifier.c:13569 [inline]
bpf_check+0x31f3/0xf090 kernel/bpf/verifier.c:14140
bpf_prog_load+0x1043/0x1550 kernel/bpf/syscall.c:2354
__sys_bpf+0x4c2/0x670 kernel/bpf/syscall.c:4657
__do_sys_bpf kernel/bpf/syscall.c:4761 [inline]
__se_sys_bpf kernel/bpf/syscall.c:4759 [inline]
__x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:4759
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: 0033:0x7f5a8656aec9
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:00007f5a847d2038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f5a867c1fa0 RCX: 00007f5a8656aec9
RDX: 0000000000000090 RSI: 00002000000007c0 RDI: 0000000000000005
RBP: 00007f5a865edf91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5a867c2038 R14: 00007f5a867c1fa0 R15: 00007ffdfa35d578
----------------
Code disassembly (best guess):
0: 2c 8b sub $0x8b,%al
2: 91 xchg %eax,%ecx
3: 10 16 adc %dl,(%rsi)
5: 00 00 add %al,(%rax)
7: 83 fa 02 cmp $0x2,%edx
a: 75 21 jne 0x2d
c: 48 8b 91 18 16 00 00 mov 0x1618(%rcx),%rdx
13: 48 8b 32 mov (%rdx),%rsi
16: 48 8d 7e 01 lea 0x1(%rsi),%rdi
1a: 8b 89 14 16 00 00 mov 0x1614(%rcx),%ecx
20: 48 39 cf cmp %rcx,%rdi
23: 73 08 jae 0x2d
25: 48 89 44 f2 08 mov %rax,0x8(%rdx,%rsi,8)
* 2a: 48 89 3a mov %rdi,(%rdx) <-- trapping instruction
2d: c3 ret
2e: 0f 1f 80 00 00 00 00 nopl 0x0(%rax)
35: 48 8b 04 24 mov (%rsp),%rax
39: 65 gs
3a: 48 rex.W
3b: 8b .byte 0x8b
3c: 0d .byte 0xd
3d: 04 a5 add $0xa5,%al
3f: 8a .byte 0x8a