FAULT_INJECTION: forcing a failure. name fail_usercopy, interval 1, probability 0, space 0, times 0 ====================================================== WARNING: possible circular locking dependency detected 6.10.0-rc6-syzkaller-01218-g390b14b5e9f6 #0 Not tainted ------------------------------------------------------ syz.2.1247/8669 is trying to acquire lock: ffffffff8e328140 (console_owner){..-.}-{0:0}, at: rcu_try_lock_acquire include/linux/rcupdate.h:334 [inline] ffffffff8e328140 (console_owner){..-.}-{0:0}, at: srcu_read_lock_nmisafe include/linux/srcu.h:232 [inline] ffffffff8e328140 (console_owner){..-.}-{0:0}, at: console_srcu_read_lock kernel/printk/printk.c:286 [inline] ffffffff8e328140 (console_owner){..-.}-{0:0}, at: console_flush_all+0x152/0xfd0 kernel/printk/printk.c:2971 but task is already holding lock: ffff8880b942a718 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x112/0x240 kernel/time/timer.c:1051 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #4 (&base->lock){-.-.}-{2:2}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162 lock_timer_base+0x112/0x240 kernel/time/timer.c:1051 __mod_timer+0x1ca/0xeb0 kernel/time/timer.c:1132 worker_enter_idle+0x31d/0x4d0 kernel/workqueue.c:1051 create_worker+0x4d8/0x720 kernel/workqueue.c:2827 maybe_create_worker kernel/workqueue.c:3073 [inline] manage_workers kernel/workqueue.c:3125 [inline] worker_thread+0x317/0xd50 kernel/workqueue.c:3384 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 -> #3 (&pool->lock){-.-.}-{2:2}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 __queue_work+0x6e5/0xee0 queue_work_on+0x1c2/0x380 kernel/workqueue.c:2411 queue_work include/linux/workqueue.h:621 [inline] rpm_suspend+0xe70/0x1730 drivers/base/power/runtime.c:662 __pm_runtime_idle+0x131/0x1a0 drivers/base/power/runtime.c:1104 pm_runtime_put include/linux/pm_runtime.h:448 [inline] __device_attach+0x3e5/0x520 drivers/base/dd.c:1046 bus_probe_device+0x189/0x260 drivers/base/bus.c:532 device_add+0x856/0xbf0 drivers/base/core.c:3679 serial_base_port_add+0x2b6/0x3f0 drivers/tty/serial/serial_base_bus.c:178 serial_core_port_device_add drivers/tty/serial/serial_core.c:3380 [inline] serial_core_register_port+0x381/0x23a0 drivers/tty/serial/serial_core.c:3421 serial8250_register_8250_port+0x1433/0x1cd0 drivers/tty/serial/8250/8250_core.c:1135 serial_pnp_probe+0x4f9/0x9d0 drivers/tty/serial/8250/8250_pnp.c:490 pnp_device_probe+0x2ba/0x460 drivers/pnp/driver.c:111 really_probe+0x2b8/0xad0 drivers/base/dd.c:656 __driver_probe_device+0x1a2/0x390 drivers/base/dd.c:798 driver_probe_device+0x50/0x430 drivers/base/dd.c:828 __driver_attach+0x45f/0x710 drivers/base/dd.c:1214 bus_for_each_dev+0x239/0x2b0 drivers/base/bus.c:368 bus_add_driver+0x346/0x670 drivers/base/bus.c:673 driver_register+0x23a/0x320 drivers/base/driver.c:246 serial8250_init+0x9e/0x170 drivers/tty/serial/8250/8250_core.c:1236 do_one_initcall+0x248/0x880 init/main.c:1267 do_initcall_level+0x157/0x210 init/main.c:1329 do_initcalls+0x3f/0x80 init/main.c:1345 kernel_init_freeable+0x435/0x5d0 init/main.c:1578 kernel_init+0x1d/0x2b0 init/main.c:1467 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 -> #2 (&dev->power.lock){-.-.}-{2:2}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162 __pm_runtime_resume+0x112/0x180 drivers/base/power/runtime.c:1171 pm_runtime_get include/linux/pm_runtime.h:396 [inline] __uart_start+0x17c/0x450 drivers/tty/serial/serial_core.c:148 uart_write+0x152/0x380 drivers/tty/serial/serial_core.c:633 process_output_block drivers/tty/n_tty.c:574 [inline] n_tty_write+0xd6a/0x1230 drivers/tty/n_tty.c:2389 iterate_tty_write drivers/tty/tty_io.c:1021 [inline] file_tty_write+0x54f/0x9b0 drivers/tty/tty_io.c:1096 new_sync_write fs/read_write.c:497 [inline] vfs_write+0xa72/0xc90 fs/read_write.c:590 ksys_write+0x1a0/0x2c0 fs/read_write.c:643 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (&port_lock_key){-.-.}-{2:2}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162 uart_port_lock_irqsave include/linux/serial_core.h:618 [inline] serial8250_console_write+0x1a8/0x1770 drivers/tty/serial/8250/8250_port.c:3352 console_emit_next_record kernel/printk/printk.c:2913 [inline] console_flush_all+0x867/0xfd0 kernel/printk/printk.c:2979 console_unlock+0x13b/0x4d0 kernel/printk/printk.c:3048 vprintk_emit+0x5a6/0x770 kernel/printk/printk.c:2348 _printk+0xd5/0x120 kernel/printk/printk.c:2373 register_console+0x727/0xcf0 kernel/printk/printk.c:3581 univ8250_console_init+0x49/0x50 drivers/tty/serial/8250/8250_core.c:714 console_init+0x1b8/0x6f0 kernel/printk/printk.c:3727 start_kernel+0x2d3/0x500 init/main.c:1038 x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:507 x86_64_start_kernel+0x99/0xa0 arch/x86/kernel/head64.c:488 common_startup_64+0x13e/0x147 -> #0 (console_owner){..-.}-{0:0}: check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain+0x18e0/0x5900 kernel/locking/lockdep.c:3869 __lock_acquire+0x1346/0x1fd0 kernel/locking/lockdep.c:5137 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 console_lock_spinning_enable kernel/printk/printk.c:1873 [inline] console_emit_next_record kernel/printk/printk.c:2907 [inline] console_flush_all+0x810/0xfd0 kernel/printk/printk.c:2979 console_unlock+0x13b/0x4d0 kernel/printk/printk.c:3048 vprintk_emit+0x5a6/0x770 kernel/printk/printk.c:2348 _printk+0xd5/0x120 kernel/printk/printk.c:2373 fail_dump lib/fault-inject.c:45 [inline] should_fail_ex+0x391/0x4e0 lib/fault-inject.c:153 strncpy_from_user+0x36/0x2f0 lib/strncpy_from_user.c:118 strncpy_from_user_nofault+0x71/0x140 mm/maccess.c:186 bpf_probe_read_user_str_common kernel/trace/bpf_trace.c:216 [inline] ____bpf_probe_read_compat_str kernel/trace/bpf_trace.c:311 [inline] bpf_probe_read_compat_str+0xe9/0x180 kernel/trace/bpf_trace.c:307 bpf_prog_9566271a57db93cf+0x42/0x44 bpf_dispatcher_nop_func include/linux/bpf.h:1243 [inline] __bpf_prog_run include/linux/filter.h:691 [inline] bpf_prog_run include/linux/filter.h:698 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2403 [inline] bpf_trace_run2+0x2ec/0x540 kernel/trace/bpf_trace.c:2444 trace_timer_start include/trace/events/timer.h:52 [inline] enqueue_timer+0x3ce/0x570 kernel/time/timer.c:663 internal_add_timer kernel/time/timer.c:688 [inline] __mod_timer+0xa0e/0xeb0 kernel/time/timer.c:1183 inet_frag_create net/ipv4/inet_fragment.c:348 [inline] inet_frag_find+0xaf2/0x2230 net/ipv4/inet_fragment.c:375 ip_find net/ipv4/ip_fragment.c:218 [inline] ip_defrag+0x3b5/0x2900 net/ipv4/ip_fragment.c:493 nf_ct_ipv4_gather_frags net/ipv4/netfilter/nf_defrag_ipv4.c:32 [inline] ipv4_conntrack_defrag+0x3de/0x5a0 net/ipv4/netfilter/nf_defrag_ipv4.c:87 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline] nf_hook_slow+0xc3/0x220 net/netfilter/core.c:626 nf_hook+0x2c4/0x450 include/linux/netfilter.h:269 __ip_local_out+0x3d9/0x4e0 net/ipv4/ip_output.c:118 ip_local_out+0x26/0x70 net/ipv4/ip_output.c:127 iptunnel_xmit+0x540/0x9b0 net/ipv4/ip_tunnel_core.c:82 ip_tunnel_xmit+0x2119/0x2950 net/ipv4/ip_tunnel.c:857 __gre_xmit net/ipv4/ip_gre.c:483 [inline] ipgre_xmit+0x958/0xd40 net/ipv4/ip_gre.c:687 __netdev_start_xmit include/linux/netdevice.h:4910 [inline] netdev_start_xmit include/linux/netdevice.h:4919 [inline] xmit_one net/core/dev.c:3580 [inline] dev_hard_start_xmit+0x27a/0x7e0 net/core/dev.c:3596 __dev_queue_xmit+0x1b63/0x3e90 net/core/dev.c:4423 dev_queue_xmit include/linux/netdevice.h:3101 [inline] __bpf_tx_skb+0x18e/0x260 net/core/filter.c:2151 ____bpf_clone_redirect net/core/filter.c:2474 [inline] bpf_clone_redirect+0x26f/0x3d0 net/core/filter.c:2446 bpf_prog_208b094576c80b22+0x5e/0x63 bpf_dispatcher_nop_func include/linux/bpf.h:1243 [inline] __bpf_prog_run include/linux/filter.h:691 [inline] bpf_prog_run include/linux/filter.h:698 [inline] bpf_test_run+0x4f0/0xa90 net/bpf/test_run.c:433 bpf_prog_test_run_skb+0xafa/0x13b0 net/bpf/test_run.c:1082 bpf_prog_test_run+0x33a/0x3b0 kernel/bpf/syscall.c:4313 __sys_bpf+0x48d/0x810 kernel/bpf/syscall.c:5728 __do_sys_bpf kernel/bpf/syscall.c:5817 [inline] __se_sys_bpf kernel/bpf/syscall.c:5815 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5815 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Chain exists of: console_owner --> &pool->lock --> &base->lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&base->lock); lock(&pool->lock); lock(&base->lock); lock(console_owner); *** DEADLOCK *** 8 locks held by syz.2.1247/8669: #0: ffffffff8e333f20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline] #0: ffffffff8e333f20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline] #0: ffffffff8e333f20 (rcu_read_lock){....}-{1:2}, at: bpf_test_timer_enter+0x19/0x140 net/bpf/test_run.c:40 #1: ffffffff8e333f80 (rcu_read_lock_bh){....}-{1:2}, at: local_bh_disable include/linux/bottom_half.h:20 [inline] #1: ffffffff8e333f80 (rcu_read_lock_bh){....}-{1:2}, at: rcu_read_lock_bh include/linux/rcupdate.h:833 [inline] #1: ffffffff8e333f80 (rcu_read_lock_bh){....}-{1:2}, at: __dev_queue_xmit+0x2da/0x3e90 net/core/dev.c:4348 #2: ffffffff8e333f20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline] #2: ffffffff8e333f20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline] #2: ffffffff8e333f20 (rcu_read_lock){....}-{1:2}, at: nf_hook+0x9e/0x450 include/linux/netfilter.h:238 #3: ffffffff8e333f20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline] #3: ffffffff8e333f20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline] #3: ffffffff8e333f20 (rcu_read_lock){....}-{1:2}, at: inet_frag_find+0x13c/0x2230 net/ipv4/inet_fragment.c:371 #4: ffff8880b942a718 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x112/0x240 kernel/time/timer.c:1051 #5: ffffffff8e333f20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline] #5: ffffffff8e333f20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline] #5: ffffffff8e333f20 (rcu_read_lock){....}-{1:2}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2402 [inline] #5: ffffffff8e333f20 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run2+0x1fc/0x540 kernel/trace/bpf_trace.c:2444 #6: ffffffff8e20fa60 (console_lock){+.+.}-{0:0}, at: _printk+0xd5/0x120 kernel/printk/printk.c:2373 #7: ffffffff8e20f690 (console_srcu){....}-{0:0}, at: rcu_try_lock_acquire include/linux/rcupdate.h:334 [inline] #7: ffffffff8e20f690 (console_srcu){....}-{0:0}, at: srcu_read_lock_nmisafe include/linux/srcu.h:232 [inline] #7: ffffffff8e20f690 (console_srcu){....}-{0:0}, at: console_srcu_read_lock kernel/printk/printk.c:286 [inline] #7: ffffffff8e20f690 (console_srcu){....}-{0:0}, at: console_flush_all+0x152/0xfd0 kernel/printk/printk.c:2971 stack backtrace: CPU: 0 PID: 8669 Comm: syz.2.1247 Not tainted 6.10.0-rc6-syzkaller-01218-g390b14b5e9f6 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2187 check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain+0x18e0/0x5900 kernel/locking/lockdep.c:3869 __lock_acquire+0x1346/0x1fd0 kernel/locking/lockdep.c:5137 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 console_lock_spinning_enable kernel/printk/printk.c:1873 [inline] console_emit_next_record kernel/printk/printk.c:2907 [inline] console_flush_all+0x810/0xfd0 kernel/printk/printk.c:2979 console_unlock+0x13b/0x4d0 kernel/printk/printk.c:3048 vprintk_emit+0x5a6/0x770 kernel/printk/printk.c:2348 _printk+0xd5/0x120 kernel/printk/printk.c:2373 fail_dump lib/fault-inject.c:45 [inline] should_fail_ex+0x391/0x4e0 lib/fault-inject.c:153 strncpy_from_user+0x36/0x2f0 lib/strncpy_from_user.c:118 strncpy_from_user_nofault+0x71/0x140 mm/maccess.c:186 bpf_probe_read_user_str_common kernel/trace/bpf_trace.c:216 [inline] ____bpf_probe_read_compat_str kernel/trace/bpf_trace.c:311 [inline] bpf_probe_read_compat_str+0xe9/0x180 kernel/trace/bpf_trace.c:307 bpf_prog_9566271a57db93cf+0x42/0x44 bpf_dispatcher_nop_func include/linux/bpf.h:1243 [inline] __bpf_prog_run include/linux/filter.h:691 [inline] bpf_prog_run include/linux/filter.h:698 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2403 [inline] bpf_trace_run2+0x2ec/0x540 kernel/trace/bpf_trace.c:2444 trace_timer_start include/trace/events/timer.h:52 [inline] enqueue_timer+0x3ce/0x570 kernel/time/timer.c:663 internal_add_timer kernel/time/timer.c:688 [inline] __mod_timer+0xa0e/0xeb0 kernel/time/timer.c:1183 inet_frag_create net/ipv4/inet_fragment.c:348 [inline] inet_frag_find+0xaf2/0x2230 net/ipv4/inet_fragment.c:375 ip_find net/ipv4/ip_fragment.c:218 [inline] ip_defrag+0x3b5/0x2900 net/ipv4/ip_fragment.c:493 nf_ct_ipv4_gather_frags net/ipv4/netfilter/nf_defrag_ipv4.c:32 [inline] ipv4_conntrack_defrag+0x3de/0x5a0 net/ipv4/netfilter/nf_defrag_ipv4.c:87 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline] nf_hook_slow+0xc3/0x220 net/netfilter/core.c:626 nf_hook+0x2c4/0x450 include/linux/netfilter.h:269 __ip_local_out+0x3d9/0x4e0 net/ipv4/ip_output.c:118 ip_local_out+0x26/0x70 net/ipv4/ip_output.c:127 iptunnel_xmit+0x540/0x9b0 net/ipv4/ip_tunnel_core.c:82 ip_tunnel_xmit+0x2119/0x2950 net/ipv4/ip_tunnel.c:857 __gre_xmit net/ipv4/ip_gre.c:483 [inline] ipgre_xmit+0x958/0xd40 net/ipv4/ip_gre.c:687 __netdev_start_xmit include/linux/netdevice.h:4910 [inline] netdev_start_xmit include/linux/netdevice.h:4919 [inline] xmit_one net/core/dev.c:3580 [inline] dev_hard_start_xmit+0x27a/0x7e0 net/core/dev.c:3596 __dev_queue_xmit+0x1b63/0x3e90 net/core/dev.c:4423 dev_queue_xmit include/linux/netdevice.h:3101 [inline] __bpf_tx_skb+0x18e/0x260 net/core/filter.c:2151 ____bpf_clone_redirect net/core/filter.c:2474 [inline] bpf_clone_redirect+0x26f/0x3d0 net/core/filter.c:2446 bpf_prog_208b094576c80b22+0x5e/0x63 bpf_dispatcher_nop_func include/linux/bpf.h:1243 [inline] __bpf_prog_run include/linux/filter.h:691 [inline] bpf_prog_run include/linux/filter.h:698 [inline] bpf_test_run+0x4f0/0xa90 net/bpf/test_run.c:433 bpf_prog_test_run_skb+0xafa/0x13b0 net/bpf/test_run.c:1082 bpf_prog_test_run+0x33a/0x3b0 kernel/bpf/syscall.c:4313 __sys_bpf+0x48d/0x810 kernel/bpf/syscall.c:5728 __do_sys_bpf kernel/bpf/syscall.c:5817 [inline] __se_sys_bpf kernel/bpf/syscall.c:5815 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5815 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f8490575bd9 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:00007f84912d2048 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f8490703f60 RCX: 00007f8490575bd9 RDX: 000000000000001e RSI: 0000000020000080 RDI: 000000000000000a RBP: 00007f84912d20a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 R13: 000000000000000b R14: 00007f8490703f60 R15: 00007ffdea835938 CPU: 0 PID: 8669 Comm: syz.2.1247 Not tainted 6.10.0-rc6-syzkaller-01218-g390b14b5e9f6 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 fail_dump lib/fault-inject.c:52 [inline] should_fail_ex+0x3b0/0x4e0 lib/fault-inject.c:153 strncpy_from_user+0x36/0x2f0 lib/strncpy_from_user.c:118 strncpy_from_user_nofault+0x71/0x140 mm/maccess.c:186 bpf_probe_read_user_str_common kernel/trace/bpf_trace.c:216 [inline] ____bpf_probe_read_compat_str kernel/trace/bpf_trace.c:311 [inline] bpf_probe_read_compat_str+0xe9/0x180 kernel/trace/bpf_trace.c:307 bpf_prog_9566271a57db93cf+0x42/0x44 bpf_dispatcher_nop_func include/linux/bpf.h:1243 [inline] __bpf_prog_run include/linux/filter.h:691 [inline] bpf_prog_run include/linux/filter.h:698 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2403 [inline] bpf_trace_run2+0x2ec/0x540 kernel/trace/bpf_trace.c:2444 trace_timer_start include/trace/events/timer.h:52 [inline] enqueue_timer+0x3ce/0x570 kernel/time/timer.c:663 internal_add_timer kernel/time/timer.c:688 [inline] __mod_timer+0xa0e/0xeb0 kernel/time/timer.c:1183 inet_frag_create net/ipv4/inet_fragment.c:348 [inline] inet_frag_find+0xaf2/0x2230 net/ipv4/inet_fragment.c:375 ip_find net/ipv4/ip_fragment.c:218 [inline] ip_defrag+0x3b5/0x2900 net/ipv4/ip_fragment.c:493 nf_ct_ipv4_gather_frags net/ipv4/netfilter/nf_defrag_ipv4.c:32 [inline] ipv4_conntrack_defrag+0x3de/0x5a0 net/ipv4/netfilter/nf_defrag_ipv4.c:87 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline] nf_hook_slow+0xc3/0x220 net/netfilter/core.c:626 nf_hook+0x2c4/0x450 include/linux/netfilter.h:269 __ip_local_out+0x3d9/0x4e0 net/ipv4/ip_output.c:118 ip_local_out+0x26/0x70 net/ipv4/ip_output.c:127 iptunnel_xmit+0x540/0x9b0 net/ipv4/ip_tunnel_core.c:82 ip_tunnel_xmit+0x2119/0x2950 net/ipv4/ip_tunnel.c:857 __gre_xmit net/ipv4/ip_gre.c:483 [inline] ipgre_xmit+0x958/0xd40 net/ipv4/ip_gre.c:687 __netdev_start_xmit include/linux/netdevice.h:4910 [inline] netdev_start_xmit include/linux/netdevice.h:4919 [inline] xmit_one net/core/dev.c:3580 [inline] dev_hard_start_xmit+0x27a/0x7e0 net/core/dev.c:3596 __dev_queue_xmit+0x1b63/0x3e90 net/core/dev.c:4423 dev_queue_xmit include/linux/netdevice.h:3101 [inline] __bpf_tx_skb+0x18e/0x260 net/core/filter.c:2151 ____bpf_clone_redirect net/core/filter.c:2474 [inline] bpf_clone_redirect+0x26f/0x3d0 net/core/filter.c:2446 bpf_prog_208b094576c80b22+0x5e/0x63 bpf_dispatcher_nop_func include/linux/bpf.h:1243 [inline] __bpf_prog_run include/linux/filter.h:691 [inline] bpf_prog_run include/linux/filter.h:698 [inline] bpf_test_run+0x4f0/0xa90 net/bpf/test_run.c:433 bpf_prog_test_run_skb+0xafa/0x13b0 net/bpf/test_run.c:1082 bpf_prog_test_run+0x33a/0x3b0 kernel/bpf/syscall.c:4313 __sys_bpf+0x48d/0x810 kernel/bpf/syscall.c:5728 __do_sys_bpf kernel/bpf/syscall.c:5817 [inline] __se_sys_bpf kernel/bpf/syscall.c:5815 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5815 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f8490575bd9 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:00007f84912d2048 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f8490703f60 RCX: 00007f8490575bd9 RDX: 000000000000001e RSI: 0000000020000080 RDI: 000000000000000a RBP: 00007f84912d20a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 R13: 000000000000000b R14: 00007f8490703f60 R15: 00007ffdea835938 syz.2.1247 (8669) used greatest stack depth: 18160 bytes left