watchdog: BUG: soft lockup - CPU#0 stuck for 123s! [syz-executor.1:21555] Modules linked in: irq event stamp: 12999526 hardirqs last enabled at (12999525): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:596 hardirqs last disabled at (12999526): [] idtentry_enter_cond_rcu+0x1d/0x50 arch/x86/entry/common.c:607 softirqs last enabled at (8750898): [] __do_softirq+0x748/0xa60 kernel/softirq.c:319 softirqs last disabled at (8750887): [] asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:711 CPU: 0 PID: 21555 Comm: syz-executor.1 Not tainted 5.8.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:csd_lock_wait kernel/smp.c:108 [inline] RIP: 0010:smp_call_function_single+0x192/0x4f0 kernel/smp.c:382 Code: 10 8b 7c 24 1c 48 8d 74 24 40 48 89 44 24 50 48 8b 44 24 08 48 89 44 24 58 e8 fa f9 ff ff 41 89 c5 eb 07 e8 f0 ff 0a 00 f3 90 <44> 8b 64 24 48 31 ff 41 83 e4 01 44 89 e6 e8 5b fc 0a 00 45 85 e4 RSP: 0018:ffffc90004ac79e0 EFLAGS: 00000246 RAX: 0000000000040000 RBX: 1ffff92000958f40 RCX: ffffc90004519000 RDX: 0000000000040000 RSI: ffffffff8168b730 RDI: 0000000000000005 RBP: ffffc90004ac7ac0 R08: 0000000000000001 R09: ffff8880ae736dc7 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000040 FS: 00007f6479862700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2f927000 CR3: 000000004e33d000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: smp_call_function_many_cond+0x1a4/0x990 kernel/smp.c:518 smp_call_function_many kernel/smp.c:577 [inline] smp_call_function kernel/smp.c:599 [inline] on_each_cpu+0x4a/0x240 kernel/smp.c:699 clock_was_set+0x18/0x20 kernel/time/hrtimer.c:872 timekeeping_inject_offset+0x3e9/0x4d0 kernel/time/timekeeping.c:1305 do_adjtimex+0x28f/0x990 kernel/time/timekeeping.c:2332 do_clock_adjtime kernel/time/posix-timers.c:1109 [inline] __do_sys_clock_adjtime+0x155/0x250 kernel/time/posix-timers.c:1121 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:359 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45cb29 Code: Bad RIP value. RSP: 002b:00007f6479861c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000131 RAX: ffffffffffffffda RBX: 00000000004db420 RCX: 000000000045cb29 RDX: 0000000000000000 RSI: 0000000020000300 RDI: 0000000000000000 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000077 R14: 00000000004c3473 R15: 00007f64798626d4 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 21559 Comm: syz-executor.3 Not tainted 5.8.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__lock_acquire+0x102d/0x56e0 kernel/locking/lockdep.c:4350 Code: 08 be 08 00 00 00 48 8d 43 3f 48 85 db 48 0f 49 c3 48 c1 f8 06 48 8d 3c c5 20 fa 58 8c e8 cb 2f 59 00 48 0f a3 1d c3 49 ff 0a <0f> 82 5b f9 ff ff e8 e8 f4 8a 06 85 c0 0f 84 eb fd ff ff 48 c7 c0 RSP: 0018:ffffc90000da8b20 EFLAGS: 00000047 RAX: 0000000000000001 RBX: 0000000000000c09 RCX: ffffffff8159b055 RDX: fffffbfff18b1f75 RSI: 0000000000000008 RDI: ffffffff8c58fba0 RBP: ffff88809c544de0 R08: 0000000000000000 R09: ffffffff8c58fba7 R10: fffffbfff18b1f74 R11: 0000000000000000 R12: ffff88809c5444c0 R13: ffff88809c544e02 R14: 0000000000000000 R15: 0000000000000002 FS: 0000000001eb3940(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055fda4c51c68 CR3: 000000009f11e000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x1f1/0xad0 kernel/locking/lockdep.c:4959 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:353 [inline] advance_sched+0x4f/0x990 net/sched/sch_taprio.c:699 __run_hrtimer kernel/time/hrtimer.c:1520 [inline] __hrtimer_run_queues+0x6a9/0xfc0 kernel/time/hrtimer.c:1584 hrtimer_interrupt+0x32a/0x930 kernel/time/hrtimer.c:1646 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline] __sysvec_apic_timer_interrupt+0x142/0x5e0 arch/x86/kernel/apic/apic.c:1097 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:711 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline] sysvec_apic_timer_interrupt+0xe0/0x120 arch/x86/kernel/apic/apic.c:1091 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:596 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:765 [inline] RIP: 0010:lock_release+0x481/0x8d0 kernel/locking/lockdep.c:4980 Code: 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 7f 03 00 00 48 83 3d 6b d7 5a 08 00 0f 84 a9 01 00 00 48 8b 3c 24 57 9d <0f> 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 48 01 c5 48 c7 45 00 RSP: 0018:ffffc90004b8fa90 EFLAGS: 00000282 RAX: 1ffffffff1369c08 RBX: ffff88809c5444c0 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: ffffffff89bc1140 RDI: 0000000000000282 RBP: 1ffff92000971f54 R08: 0000000000000001 R09: ffff88809c544d88 R10: fffffbfff155cb09 R11: 0000000000000000 R12: 0000000000000002 R13: ffffffff81ffc194 R14: 0000000000000003 R15: ffff88809c5444c0 rcu_lock_release include/linux/rcupdate.h:246 [inline] rcu_read_unlock include/linux/rcupdate.h:688 [inline] ext4_get_group_info+0x1ea/0x3a0 fs/ext4/ext4.h:3048 __ext4_new_inode+0xb7a/0x5390 fs/ext4/ialloc.c:912 ext4_symlink+0x4b0/0xe10 fs/ext4/namei.c:3303 vfs_symlink fs/namei.c:3953 [inline] vfs_symlink+0x453/0x6a0 fs/namei.c:3939 do_symlinkat+0x258/0x2c0 fs/namei.c:3980 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:359 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45c8b7 Code: Bad RIP value. RSP: 002b:00007ffd9a2c7bd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000045c8b7 RDX: 00007ffd9a2c7c73 RSI: 00000000004c26a1 RDI: 00007ffd9a2c7c60 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000013 R10: 0000000000000075 R11: 0000000000000206 R12: 0000000000000000 R13: 00007ffd9a2c7c10 R14: 0000000000000000 R15: 00007ffd9a2c7c20