================================ WARNING: inconsistent lock state syzkaller #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. syz.3.2109/13246 [HC0[0]:SC1[1]:HE1:SE0] takes: ffff88807e4594a8 (&p->tcfa_lock){+.?.}-{3:3}, at: spin_lock include/linux/spinlock.h:351 [inline] ffff88807e4594a8 (&p->tcfa_lock){+.?.}-{3:3}, at: est_fetch_counters net/core/gen_estimator.c:67 [inline] ffff88807e4594a8 (&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_pedit_init+0xbc9/0xff0 net/sched/act_pedit.c:283 tcf_action_init_1+0x463/0x6d0 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+0x82f/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+0x219/0x270 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: 2490 hardirqs last enabled at (2490): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] hardirqs last enabled at (2490): [] _raw_spin_unlock_irq+0x23/0x50 kernel/locking/spinlock.c:202 hardirqs last disabled at (2489): [] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:117 [inline] hardirqs last disabled at (2489): [] _raw_spin_lock_irq+0x7d/0xf0 kernel/locking/spinlock.c:170 softirqs last enabled at (2254): [] local_bh_disable include/linux/bottom_half.h:20 [inline] softirqs last enabled at (2254): [] fpregs_lock arch/x86/include/asm/fpu/api.h:69 [inline] softirqs last enabled at (2254): [] fpu_clone+0x35c/0xbb0 arch/x86/kernel/fpu/core.c:688 softirqs last disabled at (2477): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (2477): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (2477): [] __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 *** 3 locks held by syz.3.2109/13246: #0: ffff8880241ac260 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:415 [inline] #0: ffff8880241ac260 (&mm->mmap_lock){++++}-{4:4}, at: vm_mmap_pgoff+0x211/0x4d0 mm/util.c:578 #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: ___pte_offset_map+0x29/0x250 mm/pgtable-generic.c:286 #2: ffffc90000a08be0 ((&est->timer)){+.-.}-{0:0}, at: call_timer_fn+0xbe/0x5f0 kernel/time/timer.c:1744 stack backtrace: CPU: 1 UID: 0 PID: 13246 Comm: syz.3.2109 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:get_current arch/x86/include/asm/current.h:25 [inline] RIP: 0010:write_comp_data kernel/kcov.c:245 [inline] RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x8/0x90 kernel/kcov.c:321 Code: 48 89 44 11 20 e9 c8 7a bd 09 cc 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 <65> 48 8b 0c 25 08 a0 a0 92 65 8b 15 a8 ef e0 10 81 e2 00 01 ff 00 RSP: 0018:ffffc9000b7d75c0 EFLAGS: 00000246 RAX: ffffffff820ff94c RBX: ffff88804bbdeb38 RCX: dffffc0000000000 RDX: 000ffffffffff000 RSI: 000000007b6d7067 RDI: 0000000000000000 RBP: 000000007b6d7067 R08: 0000000000000000 R09: ffffffff820ff2c9 R10: dffffc0000000000 R11: fffff94000329227 R12: 1ffff1100977bd67 R13: 0000000000000000 R14: ffffc9000b7d76a0 R15: ffffea0000000000 __pte_needs_invert arch/x86/include/asm/pgtable-invert.h:18 [inline] protnone_mask arch/x86/include/asm/pgtable-invert.h:24 [inline] pmd_pfn arch/x86/include/asm/pgtable.h:273 [inline] pte_lockptr include/linux/mm.h:2933 [inline] __pte_offset_map_lock+0xbc/0x210 mm/pgtable-generic.c:400 pte_offset_map_lock include/linux/mm.h:3029 [inline] __get_locked_pte mm/memory.c:2096 [inline] get_locked_pte include/linux/mm.h:2722 [inline] insert_page+0x15d/0x2c0 mm/memory.c:2200 kcov_mmap+0xc2/0x120 kernel/kcov.c:506 vfs_mmap include/linux/fs.h:2289 [inline] mmap_file mm/internal.h:167 [inline] __mmap_new_file_vma mm/vma.c:2413 [inline] __mmap_new_vma mm/vma.c:2476 [inline] __mmap_region mm/vma.c:2669 [inline] mmap_region+0x18ab/0x20c0 mm/vma.c:2739 do_mmap+0xc45/0x10d0 mm/mmap.c:558 vm_mmap_pgoff+0x2a6/0x4d0 mm/util.c:580 ksys_mmap_pgoff+0x51f/0x760 mm/mmap.c:604 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: 0033:0x7fb22ed8ec23 Code: f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 41 89 ca 41 f7 c1 ff 0f 00 00 75 14 b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 25 c3 0f 1f 40 00 48 c7 c0 a8 ff ff ff 64 c7 RSP: 002b:00007ffc11dd1da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 00007fb22efc6308 RCX: 00007fb22ed8ec23 RDX: 0000000000000003 RSI: 0000000000400000 RDI: 00007fb22cbf6000 RBP: 00007fb22efc6270 R08: 00000000000000db R09: 0000000000000000 R10: 0000000000000011 R11: 0000000000000246 R12: 0000000000000003 R13: 00007fb22efc6270 R14: 000000000000128f R15: 0000000000000004 ---------------- Code disassembly (best guess): 0: 48 89 44 11 20 mov %rax,0x20(%rcx,%rdx,1) 5: e9 c8 7a bd 09 jmp 0x9bd7ad2 a: cc int3 b: 0f 1f 80 00 00 00 00 nopl 0x0(%rax) 12: 90 nop 13: 90 nop 14: 90 nop 15: 90 nop 16: 90 nop 17: 90 nop 18: 90 nop 19: 90 nop 1a: 90 nop 1b: 90 nop 1c: 90 nop 1d: 90 nop 1e: 90 nop 1f: 90 nop 20: 90 nop 21: 90 nop 22: f3 0f 1e fa endbr64 26: 48 8b 04 24 mov (%rsp),%rax * 2a: 65 48 8b 0c 25 08 a0 mov %gs:0xffffffff92a0a008,%rcx <-- trapping instruction 31: a0 92 33: 65 8b 15 a8 ef e0 10 mov %gs:0x10e0efa8(%rip),%edx # 0x10e0efe2 3a: 81 e2 00 01 ff 00 and $0xff0100,%edx