syzbot has found a reproducer for the following issue on: HEAD commit: 213f891525c2 Merge tag 'probes-fixes-v6.6-rc6' of git://gi.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=154b2f55680000 kernel config: https://syzkaller.appspot.com/x/.config?x=4471dbb58008c9f2 dashboard link: https://syzkaller.appspot.com/bug?extid=f78380e4eae53c64125c compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1711f94d680000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1267424d680000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/2865a8ce1485/disk-213f8915.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/9250aaf914b2/vmlinux-213f8915.xz kernel image: https://storage.googleapis.com/syzbot-assets/a38e8bb73fa3/bzImage-213f8915.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/1f53082eac44/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+f78380e4eae53c64125c@xxxxxxxxxxxxxxxxxxxxxxxxx list_add corruption. next->prev should be prev (ffff8880b993d228), but was caff904900000000. (next=ffff8880783659f8). ====================================================== WARNING: possible circular locking dependency detected 6.6.0-rc6-syzkaller-00029-g213f891525c2 #0 Not tainted ------------------------------------------------------ syz-executor221/5041 is trying to acquire lock: ffffffff8cab86c0 (console_owner){-...}-{0:0}, at: console_lock_spinning_enable kernel/printk/printk.c:1858 [inline] ffffffff8cab86c0 (console_owner){-...}-{0:0}, at: console_emit_next_record kernel/printk/printk.c:2904 [inline] ffffffff8cab86c0 (console_owner){-...}-{0:0}, at: console_flush_all+0x4ac/0xfb0 kernel/printk/printk.c:2966 but task is already holding lock: ffff8880b993c718 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:558 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #4 (&rq->__lock){-.-.}-{2:2}: _raw_spin_lock_nested+0x31/0x40 kernel/locking/spinlock.c:378 raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:558 raw_spin_rq_lock kernel/sched/sched.h:1372 [inline] rq_lock kernel/sched/sched.h:1681 [inline] task_fork_fair+0x70/0x240 kernel/sched/fair.c:12416 sched_cgroup_fork+0x3cf/0x510 kernel/sched/core.c:4816 copy_process+0x45ec/0x73f0 kernel/fork.c:2609 kernel_clone+0xfd/0x920 kernel/fork.c:2909 user_mode_thread+0xb4/0xf0 kernel/fork.c:2987 rest_init+0x27/0x2b0 init/main.c:691 arch_call_rest_init+0x13/0x30 init/main.c:823 start_kernel+0x39f/0x480 init/main.c:1068 x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:556 x86_64_start_kernel+0xb2/0xc0 arch/x86/kernel/head64.c:537 secondary_startup_64_no_verify+0x166/0x16b -> #3 (&p->pi_lock){-.-.}-{2:2}: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3a/0x50 kernel/locking/spinlock.c:162 class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:518 [inline] try_to_wake_up+0xb0/0x15b0 kernel/sched/core.c:4230 __wake_up_common+0x140/0x5a0 kernel/sched/wait.c:107 __wake_up_common_lock+0xd6/0x140 kernel/sched/wait.c:138 tty_port_default_wakeup+0x2a/0x40 drivers/tty/tty_port.c:69 serial8250_tx_chars+0x542/0xf60 drivers/tty/serial/8250/8250_port.c:1843 serial8250_handle_irq+0x606/0xbe0 drivers/tty/serial/8250/8250_port.c:1950 serial8250_default_handle_irq+0x94/0x210 drivers/tty/serial/8250/8250_port.c:1970 serial8250_interrupt+0xfc/0x200 drivers/tty/serial/8250/8250_core.c:127 __handle_irq_event_percpu+0x22a/0x740 kernel/irq/handle.c:158 handle_irq_event_percpu kernel/irq/handle.c:193 [inline] handle_irq_event+0xab/0x1e0 kernel/irq/handle.c:210 handle_edge_irq+0x261/0xcf0 kernel/irq/chip.c:831 generic_handle_irq_desc include/linux/irqdesc.h:161 [inline] handle_irq arch/x86/kernel/irq.c:238 [inline] __common_interrupt+0xdb/0x240 arch/x86/kernel/irq.c:257 common_interrupt+0xa9/0xd0 arch/x86/kernel/irq.c:247 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:636 native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline] arch_safe_halt arch/x86/include/asm/irqflags.h:86 [inline] acpi_safe_halt+0x1b/0x20 drivers/acpi/processor_idle.c:112 acpi_idle_enter+0xc5/0x160 drivers/acpi/processor_idle.c:707 cpuidle_enter_state+0x82/0x500 drivers/cpuidle/cpuidle.c:267 cpuidle_enter+0x4e/0xa0 drivers/cpuidle/cpuidle.c:388 cpuidle_idle_call kernel/sched/idle.c:215 [inline] do_idle+0x315/0x3f0 kernel/sched/idle.c:282 cpu_startup_entry+0x50/0x60 kernel/sched/idle.c:380 rest_init+0x16f/0x2b0 init/main.c:726 arch_call_rest_init+0x13/0x30 init/main.c:823 start_kernel+0x39f/0x480 init/main.c:1068 x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:556 x86_64_start_kernel+0xb2/0xc0 arch/x86/kernel/head64.c:537 secondary_startup_64_no_verify+0x166/0x16b -> #2 (&tty->write_wait){-.-.}-{2:2}: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3a/0x50 kernel/locking/spinlock.c:162 __wake_up_common_lock+0xbb/0x140 kernel/sched/wait.c:137 tty_port_default_wakeup+0x2a/0x40 drivers/tty/tty_port.c:69 serial8250_tx_chars+0x542/0xf60 drivers/tty/serial/8250/8250_port.c:1843 serial8250_handle_irq+0x606/0xbe0 drivers/tty/serial/8250/8250_port.c:1950 serial8250_default_handle_irq+0x94/0x210 drivers/tty/serial/8250/8250_port.c:1970 serial8250_interrupt+0xfc/0x200 drivers/tty/serial/8250/8250_core.c:127 __handle_irq_event_percpu+0x22a/0x740 kernel/irq/handle.c:158 handle_irq_event_percpu kernel/irq/handle.c:193 [inline] handle_irq_event+0xab/0x1e0 kernel/irq/handle.c:210 handle_edge_irq+0x261/0xcf0 kernel/irq/chip.c:831 generic_handle_irq_desc include/linux/irqdesc.h:161 [inline] handle_irq arch/x86/kernel/irq.c:238 [inline] __common_interrupt+0xdb/0x240 arch/x86/kernel/irq.c:257 common_interrupt+0xa9/0xd0 arch/x86/kernel/irq.c:247 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:636 native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline] arch_safe_halt arch/x86/include/asm/irqflags.h:86 [inline] acpi_safe_halt+0x1b/0x20 drivers/acpi/processor_idle.c:112 acpi_idle_enter+0xc5/0x160 drivers/acpi/processor_idle.c:707 cpuidle_enter_state+0x82/0x500 drivers/cpuidle/cpuidle.c:267 cpuidle_enter+0x4e/0xa0 drivers/cpuidle/cpuidle.c:388 cpuidle_idle_call kernel/sched/idle.c:215 [inline] do_idle+0x315/0x3f0 kernel/sched/idle.c:282 cpu_startup_entry+0x50/0x60 kernel/sched/idle.c:380 rest_init+0x16f/0x2b0 init/main.c:726 arch_call_rest_init+0x13/0x30 init/main.c:823 start_kernel+0x39f/0x480 init/main.c:1068 x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:556 x86_64_start_kernel+0xb2/0xc0 arch/x86/kernel/head64.c:537 secondary_startup_64_no_verify+0x166/0x16b -> #1 (&port_lock_key){-.-.}-{2:2}: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3a/0x50 kernel/locking/spinlock.c:162 serial8250_console_write+0x57e/0x1060 drivers/tty/serial/8250/8250_port.c:3411 console_emit_next_record kernel/printk/printk.c:2910 [inline] console_flush_all+0x4eb/0xfb0 kernel/printk/printk.c:2966 console_unlock+0x10c/0x260 kernel/printk/printk.c:3035 vprintk_emit+0x17f/0x5f0 kernel/printk/printk.c:2307 vprintk+0x7b/0x90 kernel/printk/printk_safe.c:45 _printk+0xc8/0x100 kernel/printk/printk.c:2332 register_console+0xa67/0x10d0 kernel/printk/printk.c:3524 univ8250_console_init+0x35/0x50 drivers/tty/serial/8250/8250_core.c:717 console_init+0xba/0x5c0 kernel/printk/printk.c:3667 start_kernel+0x25a/0x480 init/main.c:1004 x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:556 x86_64_start_kernel+0xb2/0xc0 arch/x86/kernel/head64.c:537 secondary_startup_64_no_verify+0x166/0x16b -> #0 (console_owner){-...}-{0:0}: check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3868 [inline] __lock_acquire+0x2e3d/0x5de0 kernel/locking/lockdep.c:5136 lock_acquire kernel/locking/lockdep.c:5753 [inline] lock_acquire+0x1ae/0x510 kernel/locking/lockdep.c:5718 console_lock_spinning_enable kernel/printk/printk.c:1858 [inline] console_emit_next_record kernel/printk/printk.c:2904 [inline] console_flush_all+0x4c1/0xfb0 kernel/printk/printk.c:2966 console_unlock+0x10c/0x260 kernel/printk/printk.c:3035 vprintk_emit+0x17f/0x5f0 kernel/printk/printk.c:2307 vprintk+0x7b/0x90 kernel/printk/printk_safe.c:45 _printk+0xc8/0x100 kernel/printk/printk.c:2332 __list_add_valid_or_report+0xa2/0x100 lib/list_debug.c:29 __list_add_valid include/linux/list.h:88 [inline] __list_add include/linux/list.h:150 [inline] list_add include/linux/list.h:169 [inline] account_entity_enqueue kernel/sched/fair.c:3534 [inline] enqueue_entity+0x97b/0x1490 kernel/sched/fair.c:5117 enqueue_task_fair+0x15b/0xbc0 kernel/sched/fair.c:6536 enqueue_task kernel/sched/core.c:2102 [inline] activate_task kernel/sched/core.c:2132 [inline] ttwu_do_activate+0x214/0xd90 kernel/sched/core.c:3787 ttwu_queue kernel/sched/core.c:4029 [inline] try_to_wake_up+0x8e7/0x15b0 kernel/sched/core.c:4346 autoremove_wake_function+0x16/0x150 kernel/sched/wait.c:424 __wake_up_common+0x140/0x5a0 kernel/sched/wait.c:107 __wake_up_common_lock+0xd6/0x140 kernel/sched/wait.c:138 wake_up_klogd_work_func kernel/printk/printk.c:3840 [inline] wake_up_klogd_work_func+0x90/0xa0 kernel/printk/printk.c:3829 irq_work_single+0x1b5/0x260 kernel/irq_work.c:221 irq_work_run_list kernel/irq_work.c:252 [inline] irq_work_run_list+0x92/0xc0 kernel/irq_work.c:235 update_process_times+0x1d5/0x220 kernel/time/timer.c:2074 tick_sched_handle+0x8e/0x170 kernel/time/tick-sched.c:254 tick_sched_timer+0xe9/0x110 kernel/time/tick-sched.c:1492 __run_hrtimer kernel/time/hrtimer.c:1688 [inline] __hrtimer_run_queues+0x647/0xc10 kernel/time/hrtimer.c:1752 hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1814 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1063 [inline] __sysvec_apic_timer_interrupt+0x105/0x3f0 arch/x86/kernel/apic/apic.c:1080 sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1074 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645 memmove+0x50/0x1b0 arch/x86/lib/memmove_64.S:70 ext4_ext_rm_leaf fs/ext4/extents.c:2736 [inline] ext4_ext_remove_space+0x1dd1/0x4390 fs/ext4/extents.c:2958 ext4_punch_hole+0xe10/0x1040 fs/ext4/inode.c:4011 ext4_fallocate+0xe21/0x3c30 fs/ext4/extents.c:4706 vfs_fallocate+0x46c/0xe80 fs/open.c:324 ioctl_preallocate+0x1a4/0x220 fs/ioctl.c:291 file_ioctl fs/ioctl.c:334 [inline] do_vfs_ioctl+0x158c/0x1920 fs/ioctl.c:850 __do_sys_ioctl fs/ioctl.c:869 [inline] __se_sys_ioctl fs/ioctl.c:857 [inline] __x64_sys_ioctl+0x112/0x210 fs/ioctl.c:857 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd other info that might help us debug this: Chain exists of: console_owner --> &p->pi_lock --> &rq->__lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&rq->__lock); lock(&p->pi_lock); lock(&rq->__lock); lock(console_owner); *** DEADLOCK *** 9 locks held by syz-executor221/5041: #0: ffff88807e30e410 (sb_writers#4){.+.+}-{0:0}, at: ioctl_preallocate+0x1a4/0x220 fs/ioctl.c:291 #1: ffff888077854a00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline] #1: ffff888077854a00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_punch_hole+0x1bd/0x1040 fs/ext4/inode.c:3916 #2: ffff888077854ba0 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:847 [inline] #2: ffff888077854ba0 (mapping.invalidate_lock){++++}-{3:3}, at: ext4_punch_hole+0x370/0x1040 fs/ext4/inode.c:3963 #3: ffff888077854888 (&ei->i_data_sem){++++}-{3:3}, at: ext4_punch_hole+0xd94/0x1040 fs/ext4/inode.c:4004 #4: ffffffff8cb98958 (log_wait.lock){-...}-{2:2}, at: __wake_up_common_lock+0xbb/0x140 kernel/sched/wait.c:137 #5: ffff88807eea0a00 (&p->pi_lock){-.-.}-{2:2}, at: class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:518 [inline] #5: ffff88807eea0a00 (&p->pi_lock){-.-.}-{2:2}, at: try_to_wake_up+0xb0/0x15b0 kernel/sched/core.c:4230 #6: ffff8880b993c718 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:558 #7: ffffffff8cb98b00 (console_lock){+.+.}-{0:0}, at: console_trylock_spinning kernel/printk/printk.c:1927 [inline] #7: ffffffff8cb98b00 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x162/0x5f0 kernel/printk/printk.c:2306 #8: ffffffff8cb98b70 (console_srcu){....}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:303 [inline] #8: ffffffff8cb98b70 (console_srcu){....}-{0:0}, at: srcu_read_lock_nmisafe include/linux/srcu.h:232 [inline] #8: ffffffff8cb98b70 (console_srcu){....}-{0:0}, at: console_srcu_read_lock kernel/printk/printk.c:292 [inline] #8: ffffffff8cb98b70 (console_srcu){....}-{0:0}, at: console_flush_all+0x12d/0xfb0 kernel/printk/printk.c:2958 stack backtrace: CPU: 0 PID: 5041 Comm: syz-executor221 Not tainted 6.6.0-rc6-syzkaller-00029-g213f891525c2 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 Call Trace: <IRQ> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 check_noncircular+0x311/0x3f0 kernel/locking/lockdep.c:2187 check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3868 [inline] __lock_acquire+0x2e3d/0x5de0 kernel/locking/lockdep.c:5136 lock_acquire kernel/locking/lockdep.c:5753 [inline] lock_acquire+0x1ae/0x510 kernel/locking/lockdep.c:5718 console_lock_spinning_enable kernel/printk/printk.c:1858 [inline] console_emit_next_record kernel/printk/printk.c:2904 [inline] console_flush_all+0x4c1/0xfb0 kernel/printk/printk.c:2966 console_unlock+0x10c/0x260 kernel/printk/printk.c:3035 vprintk_emit+0x17f/0x5f0 kernel/printk/printk.c:2307 vprintk+0x7b/0x90 kernel/printk/printk_safe.c:45 _printk+0xc8/0x100 kernel/printk/printk.c:2332 __list_add_valid_or_report+0xa2/0x100 lib/list_debug.c:29 __list_add_valid include/linux/list.h:88 [inline] __list_add include/linux/list.h:150 [inline] list_add include/linux/list.h:169 [inline] account_entity_enqueue kernel/sched/fair.c:3534 [inline] enqueue_entity+0x97b/0x1490 kernel/sched/fair.c:5117 enqueue_task_fair+0x15b/0xbc0 kernel/sched/fair.c:6536 enqueue_task kernel/sched/core.c:2102 [inline] activate_task kernel/sched/core.c:2132 [inline] ttwu_do_activate+0x214/0xd90 kernel/sched/core.c:3787 ttwu_queue kernel/sched/core.c:4029 [inline] try_to_wake_up+0x8e7/0x15b0 kernel/sched/core.c:4346 autoremove_wake_function+0x16/0x150 kernel/sched/wait.c:424 __wake_up_common+0x140/0x5a0 kernel/sched/wait.c:107 __wake_up_common_lock+0xd6/0x140 kernel/sched/wait.c:138 wake_up_klogd_work_func kernel/printk/printk.c:3840 [inline] wake_up_klogd_work_func+0x90/0xa0 kernel/printk/printk.c:3829 irq_work_single+0x1b5/0x260 kernel/irq_work.c:221 irq_work_run_list kernel/irq_work.c:252 [inline] irq_work_run_list+0x92/0xc0 kernel/irq_work.c:235 update_process_times+0x1d5/0x220 kernel/time/timer.c:2074 tick_sched_handle+0x8e/0x170 kernel/time/tick-sched.c:254 tick_sched_timer+0xe9/0x110 kernel/time/tick-sched.c:1492 __run_hrtimer kernel/time/hrtimer.c:1688 [inline] __hrtimer_run_queues+0x647/0xc10 kernel/time/hrtimer.c:1752 hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1814 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1063 [inline] __sysvec_apic_timer_interrupt+0x105/0x3f0 arch/x86/kernel/apic/apic.c:1080 sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1074 </IRQ> <TASK> asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645 RIP: 0010:memmove+0x50/0x1b0 arch/x86/lib/memmove_64.S:71 Code: 0f 1f 44 00 00 48 81 fa a8 02 00 00 72 05 40 38 fe 74 47 48 83 ea 20 48 83 ea 20 4c 8b 1e 4c 8b 56 08 4c 8b 4e 10 4c 8b 46 18 <48> 8d 76 20 4c 89 1f 4c 89 57 08 4c 89 4f 10 4c 89 47 18 48 8d 7f RSP: 0018:ffffc9000431f800 EFLAGS: 00000286 RAX: ffff88807723c078 RBX: ffff88807723c002 RCX: 0000000000000000 RDX: fffffffffec10288 RSI: ffff88807862bd44 RDI: ffff88807862bd38 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88807723c07c R13: ffff88807e30c000 R14: dffffc0000000000 R15: dffffc0000000000 ext4_ext_rm_leaf fs/ext4/extents.c:2736 [inline] ext4_ext_remove_space+0x1dd1/0x4390 fs/ext4/extents.c:2958 ext4_punch_hole+0xe10/0x1040 fs/ext4/inode.c:4011 ext4_fallocate+0xe21/0x3c30 fs/ext4/extents.c:4706 vfs_fallocate+0x46c/0xe80 fs/open.c:324 ioctl_preallocate+0x1a4/0x220 fs/ioctl.c:291 file_ioctl fs/ioctl.c:334 [inline] do_vfs_ioctl+0x158c/0x1920 fs/ioctl.c:850 __do_sys_ioctl fs/ioctl.c:869 [inline] __se_sys_ioctl fs/ioctl.c:857 [inline] __x64_sys_ioctl+0x112/0x210 fs/ioctl.c:857 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7ff93a3c62d9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 1a 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:00007ff93a361218 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007ff93a44d6d8 RCX: 00007ff93a3c62d9 RDX: 0000000020000080 RSI: 000000004030582b RDI: 0000000000000004 RBP: 00007ff93a44d6d0 R08: 00007ffd0d4db467 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff93a41a578 R13: 0000000000000006 R14: 00007ffd0d4db380 R15: 6f6f6c2f7665642f </TASK> ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:29! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 5041 Comm: syz-executor221 Not tainted 6.6.0-rc6-syzkaller-00029-g213f891525c2 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 RIP: 0010:__list_add_valid_or_report+0xa2/0x100 lib/list_debug.c:29 Code: c7 c7 20 2d e9 8a e8 3d 31 3f fd 0f 0b 48 c7 c7 c0 2d e9 8a e8 2f 31 3f fd 0f 0b 48 89 d9 48 c7 c7 20 2e e9 8a e8 1e 31 3f fd <0f> 0b 48 89 f1 48 c7 c7 a0 2e e9 8a 48 89 de e8 0a 31 3f fd 0f 0b RSP: 0018:ffffc900000079c0 EFLAGS: 00010086 RAX: 0000000000000075 RBX: ffff8880783659f8 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff816b8952 RDI: 0000000000000005 RBP: ffff88807eea00b8 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000080010004 R11: 0000000000000001 R12: ffff88807eea0120 R13: ffff88807eea3c00 R14: ffff8880b993c820 R15: ffff8880b993d228 FS: 00007ff93a3616c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000002002b000 CR3: 0000000020467000 CR4: 0000000000350ef0 Call Trace: <IRQ> __list_add_valid include/linux/list.h:88 [inline] __list_add include/linux/list.h:150 [inline] list_add include/linux/list.h:169 [inline] account_entity_enqueue kernel/sched/fair.c:3534 [inline] enqueue_entity+0x97b/0x1490 kernel/sched/fair.c:5117 enqueue_task_fair+0x15b/0xbc0 kernel/sched/fair.c:6536 enqueue_task kernel/sched/core.c:2102 [inline] activate_task kernel/sched/core.c:2132 [inline] ttwu_do_activate+0x214/0xd90 kernel/sched/core.c:3787 ttwu_queue kernel/sched/core.c:4029 [inline] try_to_wake_up+0x8e7/0x15b0 kernel/sched/core.c:4346 autoremove_wake_function+0x16/0x150 kernel/sched/wait.c:424 __wake_up_common+0x140/0x5a0 kernel/sched/wait.c:107 __wake_up_common_lock+0xd6/0x140 kernel/sched/wait.c:138 wake_up_klogd_work_func kernel/printk/printk.c:3840 [inline] wake_up_klogd_work_func+0x90/0xa0 kernel/printk/printk.c:3829 irq_work_single+0x1b5/0x260 kernel/irq_work.c:221 irq_work_run_list kernel/irq_work.c:252 [inline] irq_work_run_list+0x92/0xc0 kernel/irq_work.c:235 update_process_times+0x1d5/0x220 kernel/time/timer.c:2074 tick_sched_handle+0x8e/0x170 kernel/time/tick-sched.c:254 tick_sched_timer+0xe9/0x110 kernel/time/tick-sched.c:1492 __run_hrtimer kernel/time/hrtimer.c:1688 [inline] __hrtimer_run_queues+0x647/0xc10 kernel/time/hrtimer.c:1752 hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1814 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1063 [inline] __sysvec_apic_timer_interrupt+0x105/0x3f0 arch/x86/kernel/apic/apic.c:1080 sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1074 </IRQ> <TASK> asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645 RIP: 0010:memmove+0x50/0x1b0 arch/x86/lib/memmove_64.S:71 Code: 0f 1f 44 00 00 48 81 fa a8 02 00 00 72 05 40 38 fe 74 47 48 83 ea 20 48 83 ea 20 4c 8b 1e 4c 8b 56 08 4c 8b 4e 10 4c 8b 46 18 <48> 8d 76 20 4c 89 1f 4c 89 57 08 4c 89 4f 10 4c 89 47 18 48 8d 7f RSP: 0018:ffffc9000431f800 EFLAGS: 00000286 RAX: ffff88807723c078 RBX: ffff88807723c002 RCX: 0000000000000000 RDX: fffffffffec10288 RSI: ffff88807862bd44 RDI: ffff88807862bd38 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88807723c07c R13: ffff88807e30c000 R14: dffffc0000000000 R15: dffffc0000000000 ext4_ext_rm_leaf fs/ext4/extents.c:2736 [inline] ext4_ext_remove_space+0x1dd1/0x4390 fs/ext4/extents.c:2958 ext4_punch_hole+0xe10/0x1040 fs/ext4/inode.c:4011 ext4_fallocate+0xe21/0x3c30 fs/ext4/extents.c:4706 vfs_fallocate+0x46c/0xe80 fs/open.c:324 ioctl_preallocate+0x1a4/0x220 fs/ioctl.c:291 file_ioctl fs/ioctl.c:334 [inline] do_vfs_ioctl+0x158c/0x1920 fs/ioctl.c:850 __do_sys_ioctl fs/ioctl.c:869 [inline] __se_sys_ioctl fs/ioctl.c:857 [inline] __x64_sys_ioctl+0x112/0x210 fs/ioctl.c:857 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7ff93a3c62d9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 1a 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:00007ff93a361218 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007ff93a44d6d8 RCX: 00007ff93a3c62d9 RDX: 0000000020000080 RSI: 000000004030582b RDI: 0000000000000004 RBP: 00007ff93a44d6d0 R08: 00007ffd0d4db467 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff93a41a578 R13: 0000000000000006 R14: 00007ffd0d4db380 R15: 6f6f6c2f7665642f </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__list_add_valid_or_report+0xa2/0x100 lib/list_debug.c:29 Code: c7 c7 20 2d e9 8a e8 3d 31 3f fd 0f 0b 48 c7 c7 c0 2d e9 8a e8 2f 31 3f fd 0f 0b 48 89 d9 48 c7 c7 20 2e e9 8a e8 1e 31 3f fd <0f> 0b 48 89 f1 48 c7 c7 a0 2e e9 8a 48 89 de e8 0a 31 3f fd 0f 0b RSP: 0018:ffffc900000079c0 EFLAGS: 00010086 RAX: 0000000000000075 RBX: ffff8880783659f8 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff816b8952 RDI: 0000000000000005 RBP: ffff88807eea00b8 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000080010004 R11: 0000000000000001 R12: ffff88807eea0120 R13: ffff88807eea3c00 R14: ffff8880b993c820 R15: ffff8880b993d228 FS: 00007ff93a3616c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000002002b000 CR3: 0000000020467000 CR4: 0000000000350ef0 ---------------- Code disassembly (best guess): 0: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 5: 48 81 fa a8 02 00 00 cmp $0x2a8,%rdx c: 72 05 jb 0x13 e: 40 38 fe cmp %dil,%sil 11: 74 47 je 0x5a 13: 48 83 ea 20 sub $0x20,%rdx 17: 48 83 ea 20 sub $0x20,%rdx 1b: 4c 8b 1e mov (%rsi),%r11 1e: 4c 8b 56 08 mov 0x8(%rsi),%r10 22: 4c 8b 4e 10 mov 0x10(%rsi),%r9 26: 4c 8b 46 18 mov 0x18(%rsi),%r8 * 2a: 48 8d 76 20 lea 0x20(%rsi),%rsi <-- trapping instruction 2e: 4c 89 1f mov %r11,(%rdi) 31: 4c 89 57 08 mov %r10,0x8(%rdi) 35: 4c 89 4f 10 mov %r9,0x10(%rdi) 39: 4c 89 47 18 mov %r8,0x18(%rdi) 3d: 48 rex.W 3e: 8d .byte 0x8d 3f: 7f .byte 0x7f --- If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing.
