Hello, syzbot found the following issue on: HEAD commit: 53cdf865f90b Add linux-next specific files for 20230627 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=12a6f567280000 kernel config: https://syzkaller.appspot.com/x/.config?x=83c17849d18e7a86 dashboard link: https://syzkaller.appspot.com/bug?extid=bdc9ec9be68959140dbf compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/cba2655c9221/disk-53cdf865.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/1ef013cfe943/vmlinux-53cdf865.xz kernel image: https://storage.googleapis.com/syzbot-assets/f533d84244ee/bzImage-53cdf865.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+bdc9ec9be68959140dbf@xxxxxxxxxxxxxxxxxxxxxxxxx smpboot: CPU0: Intel(R) Xeon(R) CPU @ 2.20GHz (family: 0x6, model: 0x4f, stepping: 0x0) RCU Tasks: Setting shift to 1 and lim to 1 rcu_task_cb_adjust=1. RCU Tasks Trace: Setting shift to 1 and lim to 1 rcu_task_cb_adjust=1. Running RCU-tasks wait API self tests Performance Events: unsupported p6 CPU model 79 no PMU driver, software events only. signal: max sigframe size: 1776 rcu: Hierarchical SRCU implementation. rcu: Max phase no-delay instances is 1000. NMI watchdog: Perf NMI watchdog permanently disabled smp: Bringing up secondary CPUs ... smpboot: x86: Booting SMP configuration: .... node #0, CPUs: #1 BUG: sleeping function called from invalid context at kernel/locking/mutex.c:580 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 1, name: swapper/0 preempt_count: 1, expected: 0 RCU nest depth: 0, expected: 0 1 lock held by swapper/0/1: #0: ffffffff8c849728 (cpu_add_remove_lock){+.+.}-{3:3}, at: cpu_maps_update_begin kernel/cpu.c:469 [inline] #0: ffffffff8c849728 (cpu_add_remove_lock){+.+.}-{3:3}, at: cpu_up kernel/cpu.c:1696 [inline] #0: ffffffff8c849728 (cpu_add_remove_lock){+.+.}-{3:3}, at: cpu_up+0xbc/0x200 kernel/cpu.c:1679 Preemption disabled at: [<ffffffff81363069>] wakeup_secondary_cpu_via_init arch/x86/kernel/smpboot.c:888 [inline] [<ffffffff81363069>] do_boot_cpu arch/x86/kernel/smpboot.c:1087 [inline] [<ffffffff81363069>] native_kick_ap+0x969/0x1030 arch/x86/kernel/smpboot.c:1124 CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.4.0-next-20230627-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x136/0x150 lib/dump_stack.c:106 __might_resched+0x358/0x580 kernel/sched/core.c:10189 __mutex_lock_common kernel/locking/mutex.c:580 [inline] __mutex_lock+0x9f/0x1350 kernel/locking/mutex.c:747 cpu_bugs_smt_update+0x1b/0x440 arch/x86/kernel/cpu/bugs.c:1633 arch_smt_update+0x9/0x10 arch/x86/kernel/cpu/common.c:2326 _cpu_up+0x3d0/0x940 kernel/cpu.c:1674 cpu_up kernel/cpu.c:1707 [inline] cpu_up+0xfe/0x200 kernel/cpu.c:1679 cpuhp_bringup_mask+0xdc/0x210 kernel/cpu.c:1773 cpuhp_bringup_cpus_parallel kernel/cpu.c:1837 [inline] bringup_nonboot_cpus+0x15f/0x1a0 kernel/cpu.c:1848 smp_init+0x32/0x150 kernel/smp.c:969 kernel_init_freeable+0x425/0xba0 init/main.c:1540 kernel_init+0x1e/0x2c0 init/main.c:1437 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 </TASK> BUG: scheduling while atomic: swapper/0/1/0x00000002 3 locks held by swapper/0/1: #0: ffffffff8c849728 (cpu_add_remove_lock){+.+.}-{3:3}, at: cpu_maps_update_begin kernel/cpu.c:469 [inline] #0: ffffffff8c849728 (cpu_add_remove_lock){+.+.}-{3:3}, at: cpu_up kernel/cpu.c:1696 [inline] #0: ffffffff8c849728 (cpu_add_remove_lock){+.+.}-{3:3}, at: cpu_up+0xbc/0x200 kernel/cpu.c:1679 #1: ffffffff8c849670 (cpu_hotplug_lock){++++}-{0:0}, at: cpus_write_lock kernel/cpu.c:507 [inline] #1: ffffffff8c849670 (cpu_hotplug_lock){++++}-{0:0}, at: _cpu_up+0x66/0x940 kernel/cpu.c:1619 #2: ffffffff8c9970a8 (sparse_irq_lock){+.+.}-{3:3}, at: cpuhp_bringup_ap+0x65/0x340 kernel/cpu.c:798 Modules linked in: Preemption disabled at: [<ffffffff81363069>] wakeup_secondary_cpu_via_init arch/x86/kernel/smpboot.c:888 [inline] [<ffffffff81363069>] do_boot_cpu arch/x86/kernel/smpboot.c:1087 [inline] [<ffffffff81363069>] native_kick_ap+0x969/0x1030 arch/x86/kernel/smpboot.c:1124 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the bug is already fixed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to change bug's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the bug is a duplicate of another bug, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
