RBP: 00007fa50148747a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fa50155af80 R15: 00007ffcfc028698 watchdog: BUG: soft lockup - CPU#1 stuck for 246s! [syz-executor.3:22588] Modules linked in: CPU: 1 PID: 22588 Comm: syz-executor.3 Not tainted 5.15.122-syzkaller-00676-g1463976ddc64 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 RIP: 0010:native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline] RIP: 0010:arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline] RIP: 0010:kvm_wait+0x147/0x180 arch/x86/kernel/kvm.c:918 Code: 4c 89 e8 48 c1 e8 03 42 0f b6 04 20 84 c0 44 8b 74 24 1c 75 34 41 0f b6 45 00 44 38 f0 75 10 66 90 0f 00 2d 6b ff f2 03 fb f4 24 ff ff ff fb e9 1e ff ff ff 44 89 e9 80 e1 07 38 c1 7c a3 4c RSP: 0018:ffffc90000c26b00 EFLAGS: 00000246 RAX: 0000000000000003 RBX: 1ffff92000184d64 RCX: ffffffff8154ce3f RDX: dffffc0000000000 RSI: 0000000000000003 RDI: ffffffff86f3c1ec RBP: ffffc90000c26bb0 R08: dffffc0000000000 R09: fffffbfff0de783e R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 R13: ffffffff86f3c1ec R14: 0000000000000003 R15: 1ffff92000184d68 FS: 00007fa5001be6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2c622000 CR3: 0000000172d33000 CR4: 00000000003526a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: pv_wait arch/x86/include/asm/paravirt.h:597 [inline] pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline] __pv_queued_spin_lock_slowpath+0x6bc/0xc40 kernel/locking/qspinlock.c:508 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:585 [inline] queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:51 [inline] queued_spin_lock include/asm-generic/qspinlock.h:85 [inline] do_raw_spin_lock include/linux/spinlock.h:187 [inline] __raw_spin_lock_bh include/linux/spinlock_api_smp.h:136 [inline] _raw_spin_lock_bh+0x139/0x1b0 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:368 [inline] get_dist_table+0x207/0x2e0 net/sched/sch_netem.c:798 netem_change+0xa05/0x20c0 net/sched/sch_netem.c:988 netem_init+0x5b/0xb0 net/sched/sch_netem.c:1075 qdisc_create+0x890/0x12e0 net/sched/sch_api.c:1264 tc_modify_qdisc+0x8b4/0x14b0 rtnetlink_rcv_msg+0x951/0xc40 net/core/rtnetlink.c:5599 netlink_rcv_skb+0x1cf/0x410 net/netlink/af_netlink.c:2505 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:5617 netlink_unicast_kernel net/netlink/af_netlink.c:1330 [inline] netlink_unicast+0x8df/0xac0 net/netlink/af_netlink.c:1356 netlink_sendmsg+0xa0a/0xd20 net/netlink/af_netlink.c:1924 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg net/socket.c:724 [inline] ____sys_sendmsg+0x59e/0x8f0 net/socket.c:2412 ___sys_sendmsg+0x252/0x2e0 net/socket.c:2466 __sys_sendmsg net/socket.c:2495 [inline] __do_sys_sendmsg net/socket.c:2504 [inline] __se_sys_sendmsg+0x19a/0x260 net/socket.c:2502 __x64_sys_sendmsg+0x7b/0x90 net/socket.c:2502 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7fa50143bae9 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:00007fa5001be0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fa50155af80 RCX: 00007fa50143bae9 RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000006 RBP: 00007fa50148747a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fa50155af80 R15: 00007ffcfc028698 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 13918 Comm: syz-executor.1 Not tainted 5.15.122-syzkaller-00676-g1463976ddc64 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 RIP: 0010:native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline] RIP: 0010:arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline] RIP: 0010:kvm_wait+0x147/0x180 arch/x86/kernel/kvm.c:918 Code: 4c 89 e8 48 c1 e8 03 42 0f b6 04 20 84 c0 44 8b 74 24 1c 75 34 41 0f b6 45 00 44 38 f0 75 10 66 90 0f 00 2d 6b ff f2 03 fb f4 24 ff ff ff fb e9 1e ff ff ff 44 89 e9 80 e1 07 38 c1 7c a3 4c RSP: 0018:ffffc900000071c0 EFLAGS: 00000246 RAX: 0000000000000001 RBX: 1ffff92000000e3c RCX: 1ffffffff0d1a98c RDX: 0000000000000001 RSI: 0000000000000001 RDI: ffff8881f7037ed4 RBP: ffffc90000007270 R08: dffffc0000000000 R09: ffffed103ee06fdb R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 R13: ffff8881f7037ed4 R14: 0000000000000001 R15: 1ffff92000000e40 FS: 00007f57d816f6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555556993430 CR3: 0000000161ac2000 CR4: 00000000003526b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: pv_wait arch/x86/include/asm/paravirt.h:597 [inline] pv_wait_node kernel/locking/qspinlock_paravirt.h:325 [inline] __pv_queued_spin_lock_slowpath+0x41b/0xc40 kernel/locking/qspinlock.c:473 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:585 [inline] queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:51 [inline] queued_spin_lock include/asm-generic/qspinlock.h:85 [inline] do_raw_spin_lock include/linux/spinlock.h:187 [inline] __raw_spin_lock include/linux/spinlock_api_smp.h:143 [inline] _raw_spin_lock+0x139/0x1b0 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:363 [inline] __dev_xmit_skb net/core/dev.c:3855 [inline] __dev_queue_xmit+0xb7b/0x2e70 net/core/dev.c:4197 dev_queue_xmit+0x17/0x20 net/core/dev.c:4265 neigh_connected_output+0x417/0x450 net/core/neighbour.c:1522 neigh_output include/net/neighbour.h:517 [inline] ip6_finish_output2+0xf95/0x16e0 net/ipv6/ip6_output.c:126 __ip6_finish_output+0x678/0x850 net/ipv6/ip6_output.c:191 ip6_finish_output+0x31/0x210 net/ipv6/ip6_output.c:201 NF_HOOK_COND include/linux/netfilter.h:294 [inline] ip6_output+0x1f7/0x4d0 net/ipv6/ip6_output.c:224 dst_output include/net/dst.h:444 [inline] NF_HOOK include/linux/netfilter.h:305 [inline] ndisc_send_skb+0x73e/0xc90 net/ipv6/ndisc.c:508 ndisc_send_rs+0x532/0x6a0 net/ipv6/ndisc.c:702 addrconf_rs_timer+0x2d1/0x600 net/ipv6/addrconf.c:3953 call_timer_fn+0x3b/0x2d0 kernel/time/timer.c:1427 expire_timers kernel/time/timer.c:1472 [inline] __run_timers+0x72a/0xa10 kernel/time/timer.c:1743 run_timer_softirq+0x69/0xf0 kernel/time/timer.c:1756 __do_softirq+0x26d/0x5bf kernel/softirq.c:565 invoke_softirq kernel/softirq.c:425 [inline] __irq_exit_rcu+0x50/0xf0 kernel/softirq.c:647 irq_exit_rcu+0x9/0x10 kernel/softirq.c:659 sysvec_apic_timer_interrupt+0x9a/0xc0 arch/x86/kernel/apic/apic.c:1096 asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:exfat_get_dentry+0x705/0x970 fs/exfat/dir.c:742 Code: 41 ff cd 43 80 3c 26 00 74 08 4c 89 ff e8 13 cc af ff 44 23 6c 24 60 49 8b 1f 48 83 c3 28 48 89 d8 48 c1 e8 03 42 80 3c 20 00 <4c> 8b 74 24 48 74 08 48 89 df e8 ec cb af ff 49 63 c5 48 03 03 48 RSP: 0018:ffffc90002f5f7a0 EFLAGS: 00000246 RAX: 1ffff1102ba77f7f RBX: ffff88815d3bfbf8 RCX: ffff88811e958000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90002f5f8b0 R08: ffffffff81c9540d R09: fffff94000a1f3f9 R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 R13: 0000000000000000 R14: 1ffff920005ebf34 R15: ffffc90002f5f9a0 exfat_create_upcase_table+0x258/0xfa0 fs/exfat/nls.c:764 __exfat_fill_super fs/exfat/super.c:588 [inline] exfat_fill_super+0x1265/0x2d80 fs/exfat/super.c:644 get_tree_bdev+0x440/0x680 fs/super.c:1303 exfat_get_tree+0x1c/0x20 fs/exfat/super.c:716 vfs_get_tree+0x88/0x290 fs/super.c:1508 do_new_mount+0x28b/0xad0 fs/namespace.c:2994 path_mount+0x671/0x1070 fs/namespace.c:3324 do_mount fs/namespace.c:3337 [inline] __do_sys_mount fs/namespace.c:3545 [inline] __se_sys_mount+0x2c4/0x3b0 fs/namespace.c:3522 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3522 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f57d93ee1ea Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 09 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 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:00007f57d816eee8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f57d816ef80 RCX: 00007f57d93ee1ea RDX: 0000000020001500 RSI: 0000000020000140 RDI: 00007f57d816ef40 RBP: 0000000020001500 R08: 00007f57d816ef80 R09: 0000000000000800 R10: 0000000000000800 R11: 0000000000000202 R12: 0000000020000140 R13: 00007f57d816ef40 R14: 00000000000014fe R15: 0000000020004800