================================ WARNING: inconsistent lock state syzkaller #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. syz.3.2639/14171 [HC0[0]:SC1[1]:HE1:SE0] takes: ffff8880581eaca8 (&p->tcfa_lock){+.?.}-{3:3}, at: spin_lock include/linux/spinlock.h:351 [inline] ffff8880581eaca8 (&p->tcfa_lock){+.?.}-{3:3}, at: est_fetch_counters net/core/gen_estimator.c:67 [inline] ffff8880581eaca8 (&p->tcfa_lock){+.?.}-{3:3}, at: est_timer+0xd4/0x9f0 net/core/gen_estimator.c:83 {SOFTIRQ-ON-W} state was registered at: lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:351 [inline] tcf_mpls_init+0xbff/0x1280 net/sched/act_mpls.c:299 tcf_action_init_1+0x460/0x6d0 net/sched/act_api.c:1431 tcf_action_init+0x2cf/0xab0 net/sched/act_api.c:1506 tcf_action_add net/sched/act_api.c:2100 [inline] tc_ctl_action+0x430/0xbd0 net/sched/act_api.c:2157 rtnetlink_rcv_msg+0x77c/0xb70 net/core/rtnetlink.c:6955 netlink_rcv_skb+0x205/0x470 net/netlink/af_netlink.c:2552 netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline] netlink_unicast+0x82c/0x9e0 net/netlink/af_netlink.c:1346 netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1896 sock_sendmsg_nosec net/socket.c:714 [inline] __sock_sendmsg+0x21c/0x270 net/socket.c:729 ____sys_sendmsg+0x505/0x830 net/socket.c:2614 ___sys_sendmsg+0x21f/0x2a0 net/socket.c:2668 __sys_sendmsg net/socket.c:2700 [inline] __do_sys_sendmsg net/socket.c:2705 [inline] __se_sys_sendmsg net/socket.c:2703 [inline] __x64_sys_sendmsg+0x19b/0x260 net/socket.c:2703 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f irq event stamp: 19446 hardirqs last enabled at (19446): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] hardirqs last enabled at (19446): [] _raw_spin_unlock_irq+0x23/0x50 kernel/locking/spinlock.c:202 hardirqs last disabled at (19445): [] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:117 [inline] hardirqs last disabled at (19445): [] _raw_spin_lock_irq+0x7d/0xf0 kernel/locking/spinlock.c:170 softirqs last enabled at (18480): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (18480): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (18480): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (19443): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (19443): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (19443): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&p->tcfa_lock); lock(&p->tcfa_lock); *** DEADLOCK *** 6 locks held by syz.3.2639/14171: #0: ffff888049e201e0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_lock include/linux/mmap_lock.h:453 [inline] #0: ffff888049e201e0 (&mm->mmap_lock){++++}-{4:4}, at: __mm_populate+0x16f/0x380 mm/gup.c:1962 #1: ffffffff8e139ee0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline] #1: ffffffff8e139ee0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline] #1: ffffffff8e139ee0 (rcu_read_lock){....}-{1:3}, at: do_fault_around mm/memory.c:5530 [inline] #1: ffffffff8e139ee0 (rcu_read_lock){....}-{1:3}, at: do_read_fault mm/memory.c:5564 [inline] #1: ffffffff8e139ee0 (rcu_read_lock){....}-{1:3}, at: do_fault mm/memory.c:5707 [inline] #1: ffffffff8e139ee0 (rcu_read_lock){....}-{1:3}, at: do_pte_missing mm/memory.c:4234 [inline] #1: ffffffff8e139ee0 (rcu_read_lock){....}-{1:3}, at: handle_pte_fault mm/memory.c:6052 [inline] #1: ffffffff8e139ee0 (rcu_read_lock){....}-{1:3}, at: __handle_mm_fault+0x27b7/0x5440 mm/memory.c:6195 #2: ffffffff8e139ee0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline] #2: ffffffff8e139ee0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline] #2: ffffffff8e139ee0 (rcu_read_lock){....}-{1:3}, at: filemap_map_pages+0x150/0x1740 mm/filemap.c:3747 #3: ffffffff8e139ee0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline] #3: ffffffff8e139ee0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline] #3: ffffffff8e139ee0 (rcu_read_lock){....}-{1:3}, at: ___pte_offset_map+0x29/0x250 mm/pgtable-generic.c:286 #4: ffff8880588f3078 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:351 [inline] #4: ffff8880588f3078 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: __pte_offset_map_lock+0x13e/0x210 mm/pgtable-generic.c:401 #5: ffffc90000007be0 ((&est->timer)){+.-.}-{0:0}, at: call_timer_fn+0xbe/0x5f0 kernel/time/timer.c:1744 stack backtrace: CPU: 0 UID: 0 PID: 14171 Comm: syz.3.2639 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_usage_bug+0x297/0x2e0 kernel/locking/lockdep.c:4042 valid_state+0xc3/0xf0 kernel/locking/lockdep.c:4056 mark_lock_irq+0x36/0x390 kernel/locking/lockdep.c:4267 mark_lock+0x11b/0x190 kernel/locking/lockdep.c:4753 mark_usage kernel/locking/lockdep.c:-1 [inline] __lock_acquire+0x680/0xd20 kernel/locking/lockdep.c:5191 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:351 [inline] est_fetch_counters net/core/gen_estimator.c:67 [inline] est_timer+0xd4/0x9f0 net/core/gen_estimator.c:83 call_timer_fn+0x17e/0x5f0 kernel/time/timer.c:1747 expire_timers kernel/time/timer.c:1798 [inline] __run_timers kernel/time/timer.c:2372 [inline] __run_timer_base+0x61a/0x860 kernel/time/timer.c:2384 run_timer_base kernel/time/timer.c:2393 [inline] run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2403 handle_softirqs+0x283/0x870 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:lock_is_held_type+0x137/0x190 kernel/locking/lockdep.c:5945 Code: 01 75 44 48 c7 04 24 00 00 00 00 9c 8f 04 24 f7 04 24 00 02 00 00 75 4c 41 f7 c4 00 02 00 00 74 01 fb 65 48 8b 05 f9 53 26 07 <48> 3b 44 24 08 75 43 89 d8 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f RSP: 0018:ffffc9001c347598 EFLAGS: 00000206 RAX: 56cb371469304100 RBX: 0000000000000001 RCX: 56cb371469304100 RDX: ffff888027951e00 RSI: ffffffff8dba8ae0 RDI: ffffffff8be33800 RBP: 00000000ffffffff R08: ffffea0001b84a07 R09: 1ffffd4000370940 R10: dffffc0000000000 R11: fffff94000370941 R12: 0000000000000246 R13: ffff888027951e00 R14: ffffffff8e139ee0 R15: 0000000000000001 xa_entry include/linux/xarray.h:1226 [inline] xas_reload+0x19f/0x470 include/linux/xarray.h:1624 next_uptodate_folio+0x15f/0x5d0 mm/filemap.c:3610 filemap_map_pages+0x102b/0x1740 mm/filemap.c:3789 do_fault_around mm/memory.c:5531 [inline] do_read_fault mm/memory.c:5564 [inline] do_fault mm/memory.c:5707 [inline] do_pte_missing mm/memory.c:4234 [inline] handle_pte_fault mm/memory.c:6052 [inline] __handle_mm_fault+0x34a9/0x5440 mm/memory.c:6195 handle_mm_fault+0x40a/0x8e0 mm/memory.c:6364 faultin_page mm/gup.c:1144 [inline] __get_user_pages+0x1699/0x2ce0 mm/gup.c:1446 populate_vma_page_range+0x29f/0x3a0 mm/gup.c:1880 __mm_populate+0x24c/0x380 mm/gup.c:1983 mm_populate include/linux/mm.h:3367 [inline] vm_mmap_pgoff+0x387/0x4d0 mm/util.c:585 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fdbed98ebe9 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:00007fdbebbf6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 00007fdbedbc5fa0 RCX: 00007fdbed98ebe9 RDX: 0000000000000003 RSI: 0000000000b36000 RDI: 0000200000000000 RBP: 00007fdbeda11e19 R08: ffffffffffffffff R09: 0000000000000000 R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fdbedbc6038 R14: 00007fdbedbc5fa0 R15: 00007ffeaf536c08 ---------------- Code disassembly (best guess): 0: 01 75 44 add %esi,0x44(%rbp) 3: 48 c7 04 24 00 00 00 movq $0x0,(%rsp) a: 00 b: 9c pushf c: 8f 04 24 pop (%rsp) f: f7 04 24 00 02 00 00 testl $0x200,(%rsp) 16: 75 4c jne 0x64 18: 41 f7 c4 00 02 00 00 test $0x200,%r12d 1f: 74 01 je 0x22 21: fb sti 22: 65 48 8b 05 f9 53 26 mov %gs:0x72653f9(%rip),%rax # 0x7265423 29: 07 * 2a: 48 3b 44 24 08 cmp 0x8(%rsp),%rax <-- trapping instruction 2f: 75 43 jne 0x74 31: 89 d8 mov %ebx,%eax 33: 48 83 c4 10 add $0x10,%rsp 37: 5b pop %rbx 38: 41 5c pop %r12 3a: 41 5d pop %r13 3c: 41 5e pop %r14 3e: 41 5f pop %r15