Dear Linux Developer, Recently, when using our tool to fuzz kernel, the following crash was triggered. HEAD commit: 094226ad94f4 Linux v6.1-rc5 git tree: upstream compiler: clang 12.0.1 console output: https://drive.google.com/file/d/1QZttkbuLed4wp6U32UR6TpxfY_HHCIqQ/view?usp=share_link kernel config: https://drive.google.com/file/d/1TdPsg_5Zon8S2hEFpLBWjb8Tnd2KA5WJ/view?usp=share_link Unfortunately, I didn't have a reproducer for this crash yet. IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: Wei Chen <harperchen1110@xxxxxxxxx> ===================================================== WARNING: HARDIRQ-safe -> HARDIRQ-unsafe lock order detected 6.1.0-rc5 #40 Not tainted ----------------------------------------------------- syz-executor.0/27911 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire: ffff888076cc4f30 (&new->fa_lock){....}-{2:2}, at: kill_fasync_rcu fs/fcntl.c:996 [inline] ffff888076cc4f30 (&new->fa_lock){....}-{2:2}, at: kill_fasync+0x13b/0x430 fs/fcntl.c:1017 and this task is already holding: ffff8880144dec18 (&host->lock){-.-.}-{2:2}, at: ata_scsi_queuecmd+0x7a/0x130 drivers/ata/libata-scsi.c:4048 which would create a new lock dependency: (&host->lock){-.-.}-{2:2} -> (&new->fa_lock){....}-{2:2} but this new dependency connects a HARDIRQ-irq-safe lock: (&host->lock){-.-.}-{2:2} ... which became HARDIRQ-irq-safe at: lock_acquire+0x17f/0x430 kernel/locking/lockdep.c:5668 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xb3/0x100 kernel/locking/spinlock.c:162 __ata_sff_interrupt+0x23/0x710 drivers/ata/libata-sff.c:1540 __handle_irq_event_percpu+0x1f7/0x620 kernel/irq/handle.c:158 handle_irq_event_percpu kernel/irq/handle.c:193 [inline] handle_irq_event+0x83/0x1e0 kernel/irq/handle.c:210 handle_edge_irq+0x245/0xbe0 kernel/irq/chip.c:819 generic_handle_irq_desc include/linux/irqdesc.h:158 [inline] handle_irq arch/x86/kernel/irq.c:231 [inline] __common_interrupt+0xce/0x1e0 arch/x86/kernel/irq.c:250 common_interrupt+0x9f/0xc0 arch/x86/kernel/irq.c:240 asm_common_interrupt+0x22/0x40 arch/x86/include/asm/idtentry.h:640 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline] _raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:202 process_one_work+0x83c/0x11a0 kernel/workqueue.c:2289 worker_thread+0xa6c/0x1290 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 to a HARDIRQ-irq-unsafe lock: (tasklist_lock){.+.+}-{2:2} ... which became HARDIRQ-irq-unsafe at: ... lock_acquire+0x17f/0x430 kernel/locking/lockdep.c:5668 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228 do_wait+0x224/0x9d0 kernel/exit.c:1533 kernel_wait+0xe4/0x230 kernel/exit.c:1723 call_usermodehelper_exec_sync kernel/umh.c:140 [inline] call_usermodehelper_exec_work+0xb4/0x220 kernel/umh.c:167 process_one_work+0x83c/0x11a0 kernel/workqueue.c:2289 worker_thread+0xa6c/0x1290 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 other info that might help us debug this: Chain exists of: &host->lock --> &new->fa_lock --> tasklist_lock Possible interrupt unsafe locking scenario: CPU0 CPU1 ---- ---- lock(tasklist_lock); local_irq_disable(); lock(&host->lock); lock(&new->fa_lock); <Interrupt> lock(&host->lock); *** DEADLOCK *** 3 locks held by syz-executor.0/27911: #0: ffffffff8cd20b60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x9/0x30 include/linux/rcupdate.h:304 #1: ffff8880144dec18 (&host->lock){-.-.}-{2:2}, at: ata_scsi_queuecmd+0x7a/0x130 drivers/ata/libata-scsi.c:4048 #2: ffffffff8cd20b60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:303 the dependencies between HARDIRQ-irq-safe lock and the holding lock: -> (&host->lock){-.-.}-{2:2} { IN-HARDIRQ-W at: lock_acquire+0x17f/0x430 kernel/locking/lockdep.c:5668 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xb3/0x100 kernel/locking/spinlock.c:162 __ata_sff_interrupt+0x23/0x710 drivers/ata/libata-sff.c:1540 __handle_irq_event_percpu+0x1f7/0x620 kernel/irq/handle.c:158 handle_irq_event_percpu kernel/irq/handle.c:193 [inline] handle_irq_event+0x83/0x1e0 kernel/irq/handle.c:210 handle_edge_irq+0x245/0xbe0 kernel/irq/chip.c:819 generic_handle_irq_desc include/linux/irqdesc.h:158 [inline] handle_irq arch/x86/kernel/irq.c:231 [inline] __common_interrupt+0xce/0x1e0 arch/x86/kernel/irq.c:250 common_interrupt+0x9f/0xc0 arch/x86/kernel/irq.c:240 asm_common_interrupt+0x22/0x40 arch/x86/include/asm/idtentry.h:640 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline] _raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:202 process_one_work+0x83c/0x11a0 kernel/workqueue.c:2289 worker_thread+0xa6c/0x1290 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 IN-SOFTIRQ-W at: lock_acquire+0x17f/0x430 kernel/locking/lockdep.c:5668 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xb3/0x100 kernel/locking/spinlock.c:162 __ata_sff_interrupt+0x23/0x710 drivers/ata/libata-sff.c:1540 __handle_irq_event_percpu+0x1f7/0x620 kernel/irq/handle.c:158 handle_irq_event_percpu kernel/irq/handle.c:193 [inline] handle_irq_event+0x83/0x1e0 kernel/irq/handle.c:210 handle_edge_irq+0x245/0xbe0 kernel/irq/chip.c:819 generic_handle_irq_desc include/linux/irqdesc.h:158 [inline] handle_irq arch/x86/kernel/irq.c:231 [inline] __common_interrupt+0xce/0x1e0 arch/x86/kernel/irq.c:250 common_interrupt+0x4a/0xc0 arch/x86/kernel/irq.c:240 asm_common_interrupt+0x22/0x40 arch/x86/include/asm/idtentry.h:640 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline] _raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:202 __run_timers+0x922/0x970 kernel/time/timer.c:1792 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1803 __do_softirq+0x277/0x73a kernel/softirq.c:571 __irq_exit_rcu+0xcf/0x150 kernel/softirq.c:650 irq_exit_rcu+0x5/0x20 kernel/softirq.c:662 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1107 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] _raw_spin_unlock_irqrestore+0xbc/0x120 kernel/locking/spinlock.c:194 spin_unlock_irqrestore include/linux/spinlock.h:405 [inline] ata_scsi_queuecmd+0xc6/0x130 drivers/ata/libata-scsi.c:4058 scsi_dispatch_cmd drivers/scsi/scsi_lib.c:1524 [inline] scsi_queue_rq+0x1ea6/0x2ec0 drivers/scsi/scsi_lib.c:1760 blk_mq_dispatch_rq_list+0x104f/0x2ca0 block/blk-mq.c:1992 __blk_mq_do_dispatch_sched block/blk-mq-sched.c:173 [inline] blk_mq_do_dispatch_sched+0x820/0xe60 block/blk-mq-sched.c:187 __blk_mq_sched_dispatch_requests+0x39b/0x490 blk_mq_sched_dispatch_requests+0xef/0x160 block/blk-mq-sched.c:339 __blk_mq_run_hw_queue+0x1cf/0x260 block/blk-mq.c:2110 process_one_work+0x83c/0x11a0 kernel/workqueue.c:2289 worker_thread+0xa6c/0x1290 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 INITIAL USE at: lock_acquire+0x17f/0x430 kernel/locking/lockdep.c:5668 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xb3/0x100 kernel/locking/spinlock.c:162 ata_dev_init drivers/ata/libata-core.c:5202 [inline] ata_link_init+0x236/0x890 drivers/ata/libata-core.c:5247 ata_port_alloc+0x3ce/0x470 drivers/ata/libata-core.c:5322 ata_host_alloc+0x198/0x2c0 drivers/ata/libata-core.c:5433 ata_host_alloc_pinfo+0x27/0x430 drivers/ata/libata-core.c:5476 ata_pci_sff_prepare_host+0x40/0xe0 drivers/ata/libata-sff.c:2305 ata_pci_bmdma_prepare_host+0x20/0x70 drivers/ata/libata-sff.c:3210 piix_init_one+0x628/0x1ed0 drivers/ata/ata_piix.c:1704 local_pci_probe drivers/pci/pci-driver.c:324 [inline] pci_call_probe drivers/pci/pci-driver.c:392 [inline] __pci_device_probe drivers/pci/pci-driver.c:417 [inline] pci_device_probe+0x4fe/0xa60 drivers/pci/pci-driver.c:460 call_driver_probe+0x96/0x250 really_probe+0x237/0xaf0 drivers/base/dd.c:639 __driver_probe_device+0x1f8/0x3e0 drivers/base/dd.c:778 driver_probe_device+0x50/0x240 drivers/base/dd.c:808 __driver_attach+0x2b6/0x5b0 drivers/base/dd.c:1190 bus_for_each_dev+0x168/0x1d0 drivers/base/bus.c:301 bus_add_driver+0x32f/0x600 drivers/base/bus.c:618 driver_register+0x2e9/0x3e0 drivers/base/driver.c:246 piix_init+0x1b/0x41 drivers/ata/ata_piix.c:1774 do_one_initcall+0x1a7/0x400 init/main.c:1303 do_initcall_level+0x168/0x218 init/main.c:1376 do_initcalls+0x4b/0x8c init/main.c:1392 kernel_init_freeable+0x428/0x5d8 init/main.c:1631 kernel_init+0x19/0x2b0 init/main.c:1519 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 } ... key at: [<ffffffff9114fc40>] ata_host_alloc.__key+0x0/0x40 the dependencies between the lock to be acquired and HARDIRQ-irq-unsafe lock: -> (tasklist_lock){.+.+}-{2:2} { HARDIRQ-ON-R at: lock_acquire+0x17f/0x430 kernel/locking/lockdep.c:5668 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228 do_wait+0x224/0x9d0 kernel/exit.c:1533 kernel_wait+0xe4/0x230 kernel/exit.c:1723 call_usermodehelper_exec_sync kernel/umh.c:140 [inline] call_usermodehelper_exec_work+0xb4/0x220 kernel/umh.c:167 process_one_work+0x83c/0x11a0 kernel/workqueue.c:2289 worker_thread+0xa6c/0x1290 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 SOFTIRQ-ON-R at: lock_acquire+0x17f/0x430 kernel/locking/lockdep.c:5668 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228 do_wait+0x224/0x9d0 kernel/exit.c:1533 kernel_wait+0xe4/0x230 kernel/exit.c:1723 call_usermodehelper_exec_sync kernel/umh.c:140 [inline] call_usermodehelper_exec_work+0xb4/0x220 kernel/umh.c:167 process_one_work+0x83c/0x11a0 kernel/workqueue.c:2289 worker_thread+0xa6c/0x1290 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 INITIAL USE at: lock_acquire+0x17f/0x430 kernel/locking/lockdep.c:5668 __raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline] _raw_write_lock_irq+0xae/0xf0 kernel/locking/spinlock.c:326 copy_process+0x37cf/0x6200 kernel/fork.c:2387 kernel_clone+0x212/0x610 kernel/fork.c:2671 user_mode_thread+0x12d/0x190 kernel/fork.c:2747 rest_init+0x21/0x270 init/main.c:694 start_kernel+0x0/0x540 init/main.c:890 start_kernel+0x49a/0x540 init/main.c:1145 secondary_startup_64_no_verify+0xcf/0xdb INITIAL READ USE at: lock_acquire+0x17f/0x430 kernel/locking/lockdep.c:5668 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228 do_wait+0x224/0x9d0 kernel/exit.c:1533 kernel_wait+0xe4/0x230 kernel/exit.c:1723 call_usermodehelper_exec_sync kernel/umh.c:140 [inline] call_usermodehelper_exec_work+0xb4/0x220 kernel/umh.c:167 process_one_work+0x83c/0x11a0 kernel/workqueue.c:2289 worker_thread+0xa6c/0x1290 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 } ... key at: [<ffffffff8ca0a058>] tasklist_lock+0x18/0x40 ... acquired at: lock_acquire+0x17f/0x430 kernel/locking/lockdep.c:5668 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228 send_sigio+0xbe/0x300 fs/fcntl.c:792 kill_fasync_rcu fs/fcntl.c:1003 [inline] kill_fasync+0x1e4/0x430 fs/fcntl.c:1017 __receive_buf drivers/tty/n_tty.c:1629 [inline] n_tty_receive_buf_common+0xaac/0x1370 drivers/tty/n_tty.c:1711 tiocsti drivers/tty/tty_io.c:2286 [inline] tty_ioctl+0xda7/0x1710 drivers/tty/tty_io.c:2685 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0x90 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> (&f->f_owner.lock){....}-{2:2} { INITIAL USE at: lock_acquire+0x17f/0x430 kernel/locking/lockdep.c:5668 __raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline] _raw_write_lock_irq+0xae/0xf0 kernel/locking/spinlock.c:326 f_modown+0x38/0x340 fs/fcntl.c:91 __tty_fasync drivers/tty/tty_io.c:2237 [inline] tty_fasync+0x24a/0x340 drivers/tty/tty_io.c:2252 setfl fs/fcntl.c:73 [inline] do_fcntl+0xe6c/0x1350 fs/fcntl.c:340 __do_sys_fcntl fs/fcntl.c:454 [inline] __se_sys_fcntl+0xd5/0x1b0 fs/fcntl.c:439 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0x90 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd INITIAL READ USE at: lock_acquire+0x17f/0x430 kernel/locking/lockdep.c:5668 __raw_read_lock_irq include/linux/rwlock_api_smp.h:169 [inline] _raw_read_lock_irq+0xb6/0x100 kernel/locking/spinlock.c:244 f_getown_ex fs/fcntl.c:212 [inline] do_fcntl+0x1a5/0x1350 fs/fcntl.c:380 __do_sys_fcntl fs/fcntl.c:454 [inline] __se_sys_fcntl+0xd5/0x1b0 fs/fcntl.c:439 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0x90 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd } ... key at: [<ffffffff90e590c0>] __alloc_file.__key+0x0/0x10 ... acquired at: lock_acquire+0x17f/0x430 kernel/locking/lockdep.c:5668 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0xbb/0x100 kernel/locking/spinlock.c:236 send_sigio+0x2f/0x300 fs/fcntl.c:778 kill_fasync_rcu fs/fcntl.c:1003 [inline] kill_fasync+0x1e4/0x430 fs/fcntl.c:1017 sock_wake_async+0x133/0x150 rcu_read_unlock include/linux/rcupdate.h:767 [inline] sk_wake_async+0x12e/0x200 include/net/sock.h:2525 sock_def_error_report+0x154/0x200 net/core/sock.c:3264 smc_fback_forward_wakeup+0x1b6/0x500 net/smc/af_smc.c:786 smc_fback_error_report+0x90/0xb0 net/smc/af_smc.c:838 sk_error_report+0x3b/0xb0 net/core/sock.c:345 tcp_validate_incoming+0x1509/0x1fc0 net/ipv4/tcp_input.c:5805 tcp_rcv_state_process+0x513/0x2610 net/ipv4/tcp_input.c:6520 tcp_v4_do_rcv+0x691/0xa10 net/ipv4/tcp_ipv4.c:1704 sk_backlog_rcv include/net/sock.h:1109 [inline] __release_sock+0x106/0x3a0 net/core/sock.c:2906 release_sock+0x5d/0x1c0 net/core/sock.c:3462 sk_stream_wait_memory+0x6d9/0xe20 net/core/stream.c:145 tcp_sendmsg_locked+0x1888/0x4540 net/ipv4/tcp.c:1445 tcp_sendmsg+0x2c/0x40 net/ipv4/tcp.c:1483 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg net/socket.c:734 [inline] ____sys_sendmsg+0x558/0x8a0 net/socket.c:2482 ___sys_sendmsg net/socket.c:2536 [inline] __sys_sendmmsg+0x360/0x6c0 net/socket.c:2622 __do_sys_sendmmsg net/socket.c:2651 [inline] __se_sys_sendmmsg net/socket.c:2648 [inline] __x64_sys_sendmmsg+0x9c/0xb0 net/socket.c:2648 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0x90 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> (&new->fa_lock){....}-{2:2} { INITIAL USE at: lock_acquire+0x17f/0x430 kernel/locking/lockdep.c:5668 __raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline] _raw_write_lock_irq+0xae/0xf0 kernel/locking/spinlock.c:326 fasync_remove_entry+0xff/0x1d0 fs/fcntl.c:873 sock_fasync+0x86/0xf0 net/socket.c:1390 __fput+0x751/0x8c0 fs/file_table.c:317 task_work_run+0x243/0x300 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x1f2/0x210 kernel/entry/common.c:203 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x26/0x60 kernel/entry/common.c:296 do_syscall_64+0x4c/0x90 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd INITIAL READ USE at: lock_acquire+0x17f/0x430 kernel/locking/lockdep.c:5668 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0xbb/0x100 kernel/locking/spinlock.c:236 kill_fasync_rcu fs/fcntl.c:996 [inline] kill_fasync+0x13b/0x430 fs/fcntl.c:1017 sock_wake_async+0x133/0x150 rcu_read_unlock include/linux/rcupdate.h:767 [inline] sk_wake_async+0x12e/0x200 include/net/sock.h:2525 sock_def_error_report+0x154/0x200 net/core/sock.c:3264 smc_fback_forward_wakeup+0x1b6/0x500 net/smc/af_smc.c:786 smc_fback_error_report+0x90/0xb0 net/smc/af_smc.c:838 sk_error_report+0x3b/0xb0 net/core/sock.c:345 tcp_validate_incoming+0x1509/0x1fc0 net/ipv4/tcp_input.c:5805 tcp_rcv_state_process+0x513/0x2610 net/ipv4/tcp_input.c:6520 tcp_v4_do_rcv+0x691/0xa10 net/ipv4/tcp_ipv4.c:1704 sk_backlog_rcv include/net/sock.h:1109 [inline] __release_sock+0x106/0x3a0 net/core/sock.c:2906 release_sock+0x5d/0x1c0 net/core/sock.c:3462 sk_stream_wait_memory+0x6d9/0xe20 net/core/stream.c:145 tcp_sendmsg_locked+0x1888/0x4540 net/ipv4/tcp.c:1445 tcp_sendmsg+0x2c/0x40 net/ipv4/tcp.c:1483 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg net/socket.c:734 [inline] ____sys_sendmsg+0x558/0x8a0 net/socket.c:2482 ___sys_sendmsg net/socket.c:2536 [inline] __sys_sendmmsg+0x360/0x6c0 net/socket.c:2622 __do_sys_sendmmsg net/socket.c:2651 [inline] __se_sys_sendmmsg net/socket.c:2648 [inline] __x64_sys_sendmmsg+0x9c/0xb0 net/socket.c:2648 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0x90 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd } ... key at: [<ffffffff90e59f80>] fasync_insert_entry.__key+0x0/0x40 ... acquired at: lock_acquire+0x17f/0x430 kernel/locking/lockdep.c:5668 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0xbb/0x100 kernel/locking/spinlock.c:236 kill_fasync_rcu fs/fcntl.c:996 [inline] kill_fasync+0x13b/0x430 fs/fcntl.c:1017 sg_rq_end_io+0x604/0xf50 drivers/scsi/sg.c:1403 __blk_mq_end_request+0x2c7/0x380 block/blk-mq.c:1011 scsi_end_request+0x4ed/0x9c0 drivers/scsi/scsi_lib.c:576 scsi_io_completion+0xc25/0x27a0 drivers/scsi/scsi_lib.c:985 ata_scsi_simulate+0x336e/0x3dd0 drivers/ata/libata-scsi.c:4190 __ata_scsi_queuecmd+0x20b/0x1020 drivers/ata/libata-scsi.c:4009 ata_scsi_queuecmd+0xa0/0x130 drivers/ata/libata-scsi.c:4052 scsi_dispatch_cmd drivers/scsi/scsi_lib.c:1524 [inline] scsi_queue_rq+0x1ea6/0x2ec0 drivers/scsi/scsi_lib.c:1760 blk_mq_dispatch_rq_list+0x104f/0x2ca0 block/blk-mq.c:1992 __blk_mq_sched_dispatch_requests+0x382/0x490 block/blk-mq-sched.c:306 blk_mq_sched_dispatch_requests+0xef/0x160 block/blk-mq-sched.c:339 __blk_mq_run_hw_queue+0x1cf/0x260 block/blk-mq.c:2110 blk_mq_sched_insert_request+0x1e2/0x430 block/blk-mq-sched.c:458 blk_execute_rq_nowait+0x2e8/0x3b0 block/blk-mq.c:1305 sg_common_write+0x8c0/0x1970 drivers/scsi/sg.c:832 sg_new_write+0x61f/0x860 drivers/scsi/sg.c:770 sg_ioctl_common drivers/scsi/sg.c:935 [inline] sg_ioctl+0x1c51/0x2be0 drivers/scsi/sg.c:1159 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0x90 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd stack backtrace: CPU: 0 PID: 27911 Comm: syz-executor.0 Not tainted 6.1.0-rc5 #40 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106 print_bad_irq_dependency kernel/locking/lockdep.c:2611 [inline] check_irq_usage kernel/locking/lockdep.c:2850 [inline] check_prev_add kernel/locking/lockdep.c:3101 [inline] check_prevs_add+0x4e5f/0x5b70 kernel/locking/lockdep.c:3216 validate_chain kernel/locking/lockdep.c:3831 [inline] __lock_acquire+0x4411/0x6070 kernel/locking/lockdep.c:5055 lock_acquire+0x17f/0x430 kernel/locking/lockdep.c:5668 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0xbb/0x100 kernel/locking/spinlock.c:236 kill_fasync_rcu fs/fcntl.c:996 [inline] kill_fasync+0x13b/0x430 fs/fcntl.c:1017 sg_rq_end_io+0x604/0xf50 drivers/scsi/sg.c:1403 __blk_mq_end_request+0x2c7/0x380 block/blk-mq.c:1011 scsi_end_request+0x4ed/0x9c0 drivers/scsi/scsi_lib.c:576 scsi_io_completion+0xc25/0x27a0 drivers/scsi/scsi_lib.c:985 ata_scsi_simulate+0x336e/0x3dd0 drivers/ata/libata-scsi.c:4190 __ata_scsi_queuecmd+0x20b/0x1020 drivers/ata/libata-scsi.c:4009 ata_scsi_queuecmd+0xa0/0x130 drivers/ata/libata-scsi.c:4052 scsi_dispatch_cmd drivers/scsi/scsi_lib.c:1524 [inline] scsi_queue_rq+0x1ea6/0x2ec0 drivers/scsi/scsi_lib.c:1760 blk_mq_dispatch_rq_list+0x104f/0x2ca0 block/blk-mq.c:1992 __blk_mq_sched_dispatch_requests+0x382/0x490 block/blk-mq-sched.c:306 blk_mq_sched_dispatch_requests+0xef/0x160 block/blk-mq-sched.c:339 __blk_mq_run_hw_queue+0x1cf/0x260 block/blk-mq.c:2110 blk_mq_sched_insert_request+0x1e2/0x430 block/blk-mq-sched.c:458 blk_execute_rq_nowait+0x2e8/0x3b0 block/blk-mq.c:1305 sg_common_write+0x8c0/0x1970 drivers/scsi/sg.c:832 sg_new_write+0x61f/0x860 drivers/scsi/sg.c:770 sg_ioctl_common drivers/scsi/sg.c:935 [inline] sg_ioctl+0x1c51/0x2be0 drivers/scsi/sg.c:1159 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0x90 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f153dc8bded Code: 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 f3 0f 1e fa 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f153ede2c58 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f153ddabf80 RCX: 00007f153dc8bded RDX: 0000000020000440 RSI: 0000000000002285 RDI: 0000000000000006 RBP: 00007f153dcf8ce0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f153ddabf80 R13: 00007ffc72e5108f R14: 00007ffc72e51230 R15: 00007f153ede2dc0 </TASK> Best, Wei
