================================ WARNING: inconsistent lock state 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. syz-executor.4/6228 [HC0[0]:SC1[1]:HE0:SE0] takes: ffff888029e50148 (&timer->lock){+.?.}-{2:2}, at: class_spinlock_irqsave_constructor include/linux/spinlock.h:574 [inline] ffff888029e50148 (&timer->lock){+.?.}-{2:2}, at: snd_timer_interrupt.part.0+0x31/0xd80 sound/core/timer.c:818 {SOFTIRQ-ON-W} state was registered at: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719 __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] class_spinlock_constructor include/linux/spinlock.h:561 [inline] snd_timer_close_locked+0x65/0xbd0 sound/core/timer.c:412 snd_timer_close+0x8b/0xf0 sound/core/timer.c:464 snd_seq_timer_close+0xa4/0x100 sound/core/seq/seq_timer.c:302 queue_delete+0x49/0xa0 sound/core/seq/seq_queue.c:126 snd_seq_queue_delete+0x45/0x60 sound/core/seq/seq_queue.c:188 snd_seq_kernel_client_ctl+0x107/0x1c0 sound/core/seq/seq_clientmgr.c:2526 delete_seq_queue.isra.0+0xc8/0x150 sound/core/seq/oss/seq_oss_init.c:371 odev_release+0x52/0x80 sound/core/seq/oss/seq_oss.c:144 __fput+0x270/0xb80 fs/file_table.c:422 __fput_sync+0x47/0x50 fs/file_table.c:507 __do_sys_close fs/open.c:1556 [inline] __se_sys_close fs/open.c:1541 [inline] __x64_sys_close+0x86/0x100 fs/open.c:1541 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x6d/0x75 irq event stamp: 14333 hardirqs last enabled at (14332): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] hardirqs last enabled at (14332): [] _raw_spin_unlock_irq+0x23/0x50 kernel/locking/spinlock.c:202 hardirqs last disabled at (14333): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (14333): [] _raw_spin_lock_irqsave+0x52/0x60 kernel/locking/spinlock.c:162 softirqs last enabled at (13966): [] softirq_handle_end kernel/softirq.c:400 [inline] softirqs last enabled at (13966): [] __do_softirq+0x596/0x8de kernel/softirq.c:583 softirqs last disabled at (14323): [] invoke_softirq kernel/softirq.c:428 [inline] softirqs last disabled at (14323): [] __irq_exit_rcu kernel/softirq.c:633 [inline] softirqs last disabled at (14323): [] irq_exit_rcu+0xb9/0x120 kernel/softirq.c:645 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&timer->lock); lock(&timer->lock); *** DEADLOCK *** 6 locks held by syz-executor.4/6228: #0: ffffffff9499fdd8 (&rdma_nl_types[idx].sem){.+.+}-{3:3}, at: rdma_nl_rcv_msg+0x16a/0x6e0 drivers/infiniband/core/netlink.c:164 #1: ffffffff8efa6230 (link_ops_rwsem){++++}-{3:3}, at: nldev_newlink+0x2db/0x670 drivers/infiniband/core/nldev.c:1753 #2: ffffffff8ef929f0 (devices_rwsem){++++}-{3:3}, at: enable_device_and_get+0x104/0x3f0 drivers/infiniband/core/device.c:1322 #3: ffffffff8ef92770 (rdma_nets_rwsem){++++}-{3:3}, at: add_compat_devs drivers/infiniband/core/device.c:1025 [inline] #3: ffffffff8ef92770 (rdma_nets_rwsem){++++}-{3:3}, at: enable_device_and_get+0x2cd/0x3f0 drivers/infiniband/core/device.c:1338 #4: ffff888061574f28 (&device->compat_devs_mutex){+.+.}-{3:3}, at: add_one_compat_dev+0x112/0x720 drivers/infiniband/core/device.c:943 #5: ffffc90000a08cb0 ((&priv->tlist)){+.-.}-{0:0}, at: call_timer_fn+0x11a/0x5b0 kernel/time/timer.c:1789 stack backtrace: CPU: 1 PID: 6228 Comm: syz-executor.4 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114 print_usage_bug kernel/locking/lockdep.c:3971 [inline] valid_state kernel/locking/lockdep.c:4013 [inline] mark_lock_irq kernel/locking/lockdep.c:4216 [inline] mark_lock+0x923/0xc60 kernel/locking/lockdep.c:4678 mark_usage kernel/locking/lockdep.c:4567 [inline] __lock_acquire+0x13d4/0x3b30 kernel/locking/lockdep.c:5091 lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162 class_spinlock_irqsave_constructor include/linux/spinlock.h:574 [inline] snd_timer_interrupt.part.0+0x31/0xd80 sound/core/timer.c:818 snd_timer_interrupt sound/core/timer.c:1107 [inline] snd_timer_s_function+0x14f/0x200 sound/core/timer.c:1107 call_timer_fn+0x1a0/0x5b0 kernel/time/timer.c:1792 expire_timers kernel/time/timer.c:1843 [inline] __run_timers+0x74b/0xab0 kernel/time/timer.c:2408 __run_timer_base kernel/time/timer.c:2419 [inline] __run_timer_base kernel/time/timer.c:2412 [inline] run_timer_base+0x111/0x190 kernel/time/timer.c:2428 run_timer_softirq+0x1a/0x40 kernel/time/timer.c:2438 __do_softirq+0x218/0x8de kernel/softirq.c:554 invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu kernel/softirq.c:633 [inline] irq_exit_rcu+0xb9/0x120 kernel/softirq.c:645 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:__sanitizer_cov_trace_pc+0x48/0x60 kernel/kcov.c:212 Code: f6 c4 01 74 35 8b 82 14 16 00 00 85 c0 74 2b 8b 82 f0 15 00 00 83 f8 02 75 20 48 8b 8a f8 15 00 00 8b 92 f4 15 00 00 48 8b 01 <48> 83 c0 01 48 39 d0 73 07 48 89 01 48 89 34 c1 c3 cc cc cc cc 0f RSP: 0018:ffffc9000355e500 EFLAGS: 00000246 RAX: 000000000003ffff RBX: ffffc9000355e588 RCX: ffffc9000a87a000 RDX: 0000000000040000 RSI: ffffffff813c9b50 RDI: 0000000000000001 RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000006 R12: ffffffff88a7d0c5 R13: 0000000000000000 R14: ffffc9000355e648 R15: ffffc9000355e5bd unwind_next_frame+0x480/0x23a0 arch/x86/kernel/unwind_orc.c:494 arch_stack_walk+0x100/0x170 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:312 [inline] __kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:338 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3798 [inline] slab_alloc_node mm/slub.c:3845 [inline] kmem_cache_alloc+0x136/0x320 mm/slub.c:3852 kmem_cache_zalloc include/linux/slab.h:739 [inline] __kernfs_new_node+0xd3/0x8a0 fs/kernfs/dir.c:615 kernfs_new_node+0x18c/0x240 fs/kernfs/dir.c:691 __kernfs_create_file+0x53/0x340 fs/kernfs/file.c:1025 sysfs_add_file_mode_ns+0x1ff/0x3b0 fs/sysfs/file.c:307 create_files fs/sysfs/group.c:64 [inline] internal_create_group+0x31f/0xb50 fs/sysfs/group.c:152 internal_create_groups+0x9d/0x150 fs/sysfs/group.c:192 setup_port+0x405/0x1720 drivers/infiniband/core/sysfs.c:1258 ib_setup_port_attrs+0x207/0x5d0 drivers/infiniband/core/sysfs.c:1444 add_one_compat_dev+0x4c5/0x720 drivers/infiniband/core/device.c:969 add_compat_devs drivers/infiniband/core/device.c:1027 [inline] enable_device_and_get+0x338/0x3f0 drivers/infiniband/core/device.c:1338 ib_register_device drivers/infiniband/core/device.c:1420 [inline] ib_register_device+0x880/0xbf0 drivers/infiniband/core/device.c:1366 rxe_register_device+0x2fc/0x3d0 drivers/infiniband/sw/rxe/rxe_verbs.c:1524 rxe_net_add+0x86/0xe0 drivers/infiniband/sw/rxe/rxe_net.c:534 rxe_newlink+0x70/0x190 drivers/infiniband/sw/rxe/rxe.c:197 nldev_newlink+0x396/0x670 drivers/infiniband/core/nldev.c:1763 rdma_nl_rcv_msg+0x388/0x6e0 drivers/infiniband/core/netlink.c:195 rdma_nl_rcv_skb.constprop.0.isra.0+0x2e6/0x450 drivers/infiniband/core/netlink.c:239 netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline] netlink_unicast+0x542/0x820 net/netlink/af_netlink.c:1361 netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1905 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] ____sys_sendmsg+0xab5/0xc90 net/socket.c:2584 ___sys_sendmsg+0x135/0x1e0 net/socket.c:2638 __sys_sendmsg+0x117/0x1f0 net/socket.c:2667 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x6d/0x75 RIP: 0033:0x7f8cb607de69 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f8cb6d4a0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f8cb61abf80 RCX: 00007f8cb607de69 RDX: 0000000000000000 RSI: 0000000020001940 RDI: 0000000000000005 RBP: 00007f8cb60ca47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f8cb61abf80 R15: 00007ffe9488e238 TCP: request_sock_TCP: Possible SYN flooding on port [::ffff:172.20.20.170]:2. Sending cookies. ---------------- Code disassembly (best guess): 0: f6 c4 01 test $0x1,%ah 3: 74 35 je 0x3a 5: 8b 82 14 16 00 00 mov 0x1614(%rdx),%eax b: 85 c0 test %eax,%eax d: 74 2b je 0x3a f: 8b 82 f0 15 00 00 mov 0x15f0(%rdx),%eax 15: 83 f8 02 cmp $0x2,%eax 18: 75 20 jne 0x3a 1a: 48 8b 8a f8 15 00 00 mov 0x15f8(%rdx),%rcx 21: 8b 92 f4 15 00 00 mov 0x15f4(%rdx),%edx 27: 48 8b 01 mov (%rcx),%rax * 2a: 48 83 c0 01 add $0x1,%rax <-- trapping instruction 2e: 48 39 d0 cmp %rdx,%rax 31: 73 07 jae 0x3a 33: 48 89 01 mov %rax,(%rcx) 36: 48 89 34 c1 mov %rsi,(%rcx,%rax,8) 3a: c3 ret 3b: cc int3 3c: cc int3 3d: cc int3 3e: cc int3 3f: 0f .byte 0xf