team0 (unregistering): Port device team_slave_1 removed team0 (unregistering): Port device team_slave_0 removed bond0 (unregistering): Releasing backup interface bond_slave_1 bond0 (unregistering): Releasing backup interface bond_slave_0 bond0 (unregistering): Released all slaves INFO: task syz-executor5:12286 blocked for more than 140 seconds. Not tainted 5.0.0-rc4+ #55 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor5 D20440 12286 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2844 [inline] __schedule+0x897/0x1e60 kernel/sched/core.c:3485 schedule+0xfe/0x350 kernel/sched/core.c:3529 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:287 [inline] rwsem_down_read_failed+0x360/0x6d0 kernel/locking/rwsem-xadd.c:304 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:83 [inline] __percpu_down_read kernel/locking/percpu-rwsem.c:85 [inline] __percpu_down_read+0x142/0x1d0 kernel/locking/percpu-rwsem.c:41 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] uprobe_start_dup_mmap+0xbf/0xe0 kernel/events/uprobes.c:1525 dup_mmap kernel/fork.c:472 [inline] dup_mm kernel/fork.c:1320 [inline] copy_mm kernel/fork.c:1375 [inline] copy_process+0x3041/0x8860 kernel/fork.c:1917 _do_fork+0x1a9/0x1170 kernel/fork.c:2227 __do_sys_clone kernel/fork.c:2334 [inline] __se_sys_clone kernel/fork.c:2328 [inline] __x64_sys_clone+0xbf/0x150 kernel/fork.c:2328 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45640a Code: Bad RIP value. RSP: 002b:00007fff99a1aa10 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007fff99a1aa10 RCX: 000000000045640a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007fff99a1aa50 R08: 0000000000000001 R09: 00000000020e7940 R10: 00000000020e7c10 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000005 INFO: task syz-executor0:19339 blocked for more than 140 seconds. Not tainted 5.0.0-rc4+ #55 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor0 D21096 19339 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2844 [inline] __schedule+0x897/0x1e60 kernel/sched/core.c:3485 schedule+0xfe/0x350 kernel/sched/core.c:3529 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:287 [inline] rwsem_down_read_failed+0x360/0x6d0 kernel/locking/rwsem-xadd.c:304 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:83 [inline] __percpu_down_read kernel/locking/percpu-rwsem.c:85 [inline] __percpu_down_read+0x142/0x1d0 kernel/locking/percpu-rwsem.c:41 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] uprobe_start_dup_mmap+0xbf/0xe0 kernel/events/uprobes.c:1525 dup_mmap kernel/fork.c:472 [inline] dup_mm kernel/fork.c:1320 [inline] copy_mm kernel/fork.c:1375 [inline] copy_process+0x3041/0x8860 kernel/fork.c:1917 _do_fork+0x1a9/0x1170 kernel/fork.c:2227 __do_sys_clone kernel/fork.c:2334 [inline] __se_sys_clone kernel/fork.c:2328 [inline] __x64_sys_clone+0xbf/0x150 kernel/fork.c:2328 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45640a Code: Bad RIP value. RSP: 002b:00007fffb223af60 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007fffb223af60 RCX: 000000000045640a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007fffb223afa0 R08: 0000000000000001 R09: 0000000001d78940 R10: 0000000001d78c10 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 INFO: task syz-executor2:21337 blocked for more than 140 seconds. Not tainted 5.0.0-rc4+ #55 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor2 D20440 21337 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2844 [inline] __schedule+0x897/0x1e60 kernel/sched/core.c:3485 schedule+0xfe/0x350 kernel/sched/core.c:3529 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:287 [inline] rwsem_down_read_failed+0x360/0x6d0 kernel/locking/rwsem-xadd.c:304 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:83 [inline] __percpu_down_read kernel/locking/percpu-rwsem.c:85 [inline] __percpu_down_read+0x142/0x1d0 kernel/locking/percpu-rwsem.c:41 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] uprobe_start_dup_mmap+0xbf/0xe0 kernel/events/uprobes.c:1525 dup_mmap kernel/fork.c:472 [inline] dup_mm kernel/fork.c:1320 [inline] copy_mm kernel/fork.c:1375 [inline] copy_process+0x3041/0x8860 kernel/fork.c:1917 _do_fork+0x1a9/0x1170 kernel/fork.c:2227 __do_sys_clone kernel/fork.c:2334 [inline] __se_sys_clone kernel/fork.c:2328 [inline] __x64_sys_clone+0xbf/0x150 kernel/fork.c:2328 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45640a Code: Bad RIP value. RSP: 002b:00007ffe399cbef0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffe399cbef0 RCX: 000000000045640a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffe399cbf30 R08: 0000000000000001 R09: 0000000001bc5940 R10: 0000000001bc5c10 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000002 INFO: task syz-executor1:22883 blocked for more than 140 seconds. Not tainted 5.0.0-rc4+ #55 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor1 D21640 22883 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2844 [inline] __schedule+0x897/0x1e60 kernel/sched/core.c:3485 schedule+0xfe/0x350 kernel/sched/core.c:3529 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:287 [inline] rwsem_down_read_failed+0x360/0x6d0 kernel/locking/rwsem-xadd.c:304 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:83 [inline] __percpu_down_read kernel/locking/percpu-rwsem.c:85 [inline] __percpu_down_read+0x142/0x1d0 kernel/locking/percpu-rwsem.c:41 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] uprobe_start_dup_mmap+0xbf/0xe0 kernel/events/uprobes.c:1525 dup_mmap kernel/fork.c:472 [inline] dup_mm kernel/fork.c:1320 [inline] copy_mm kernel/fork.c:1375 [inline] copy_process+0x3041/0x8860 kernel/fork.c:1917 _do_fork+0x1a9/0x1170 kernel/fork.c:2227 __do_sys_clone kernel/fork.c:2334 [inline] __se_sys_clone kernel/fork.c:2328 [inline] __x64_sys_clone+0xbf/0x150 kernel/fork.c:2328 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45640a Code: Bad RIP value. RSP: 002b:00007ffe3f8e8000 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffe3f8e8000 RCX: 000000000045640a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffe3f8e8040 R08: 0000000000000001 R09: 0000000001188940 R10: 0000000001188c10 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001 INFO: task syz-executor4:25806 blocked for more than 140 seconds. Not tainted 5.0.0-rc4+ #55 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor4 D21640 25806 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2844 [inline] __schedule+0x897/0x1e60 kernel/sched/core.c:3485 schedule+0xfe/0x350 kernel/sched/core.c:3529 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:287 [inline] rwsem_down_read_failed+0x360/0x6d0 kernel/locking/rwsem-xadd.c:304 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:83 [inline] __percpu_down_read kernel/locking/percpu-rwsem.c:85 [inline] __percpu_down_read+0x142/0x1d0 kernel/locking/percpu-rwsem.c:41 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] uprobe_start_dup_mmap+0xbf/0xe0 kernel/events/uprobes.c:1525 dup_mmap kernel/fork.c:472 [inline] dup_mm kernel/fork.c:1320 [inline] copy_mm kernel/fork.c:1375 [inline] copy_process+0x3041/0x8860 kernel/fork.c:1917 _do_fork+0x1a9/0x1170 kernel/fork.c:2227 __do_sys_clone kernel/fork.c:2334 [inline] __se_sys_clone kernel/fork.c:2328 [inline] __x64_sys_clone+0xbf/0x150 kernel/fork.c:2328 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45640a Code: Bad RIP value. RSP: 002b:00007ffc17bb9ed0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffc17bb9ed0 RCX: 000000000045640a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffc17bb9f10 R08: 0000000000000001 R09: 0000000001e05940 R10: 0000000001e05c10 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000004 INFO: task udevd:25918 blocked for more than 140 seconds. Not tainted 5.0.0-rc4+ #55 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. udevd D24488 25918 3866 0x00000000 Call Trace: context_switch kernel/sched/core.c:2844 [inline] __schedule+0x897/0x1e60 kernel/sched/core.c:3485 schedule+0xfe/0x350 kernel/sched/core.c:3529 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:287 [inline] rwsem_down_read_failed+0x360/0x6d0 kernel/locking/rwsem-xadd.c:304 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:83 [inline] __percpu_down_read kernel/locking/percpu-rwsem.c:85 [inline] __percpu_down_read+0x142/0x1d0 kernel/locking/percpu-rwsem.c:41 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] uprobe_start_dup_mmap+0xbf/0xe0 kernel/events/uprobes.c:1525 dup_mmap kernel/fork.c:472 [inline] dup_mm kernel/fork.c:1320 [inline] copy_mm kernel/fork.c:1375 [inline] copy_process+0x3041/0x8860 kernel/fork.c:1917 _do_fork+0x1a9/0x1170 kernel/fork.c:2227 __do_sys_clone kernel/fork.c:2334 [inline] __se_sys_clone kernel/fork.c:2328 [inline] __x64_sys_clone+0xbf/0x150 kernel/fork.c:2328 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f3ff6df8f46 Code: Bad RIP value. RSP: 002b:00007ffd72566760 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffd72566760 RCX: 00007f3ff6df8f46 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffd725667c0 R08: 000000000000653e R09: 000000000000653e R10: 00007f3ff7715a70 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd72566780 R14: 0000000000000005 R15: 0000000000000005 INFO: task udevd:26439 blocked for more than 140 seconds. Not tainted 5.0.0-rc4+ #55 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. udevd D24888 26439 3866 0x00000000 Call Trace: context_switch kernel/sched/core.c:2844 [inline] __schedule+0x897/0x1e60 kernel/sched/core.c:3485 schedule+0xfe/0x350 kernel/sched/core.c:3529 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:287 [inline] rwsem_down_read_failed+0x360/0x6d0 kernel/locking/rwsem-xadd.c:304 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:83 [inline] __percpu_down_read kernel/locking/percpu-rwsem.c:85 [inline] __percpu_down_read+0x142/0x1d0 kernel/locking/percpu-rwsem.c:41 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] uprobe_start_dup_mmap+0xbf/0xe0 kernel/events/uprobes.c:1525 dup_mmap kernel/fork.c:472 [inline] dup_mm kernel/fork.c:1320 [inline] copy_mm kernel/fork.c:1375 [inline] copy_process+0x3041/0x8860 kernel/fork.c:1917 _do_fork+0x1a9/0x1170 kernel/fork.c:2227 __do_sys_clone kernel/fork.c:2334 [inline] __se_sys_clone kernel/fork.c:2328 [inline] __x64_sys_clone+0xbf/0x150 kernel/fork.c:2328 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f3ff6df8f46 Code: Bad RIP value. RSP: 002b:00007ffd72566760 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffd72566760 RCX: 00007f3ff6df8f46 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffd725667c0 R08: 0000000000006747 R09: 0000000000006747 R10: 00007f3ff7715a70 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd72566780 R14: 0000000000000005 R15: 0000000000000005 Showing all locks held in the system: 1 lock held by khungtaskd/1037: #0: 0000000040eb963a (rcu_read_lock){....}, at: debug_show_all_locks+0xc6/0x41d kernel/locking/lockdep.c:4389 1 lock held by udevd/3866: #0: 00000000692e0b51 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:472 [inline] #0: 00000000692e0b51 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1320 [inline] #0: 00000000692e0b51 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1375 [inline] #0: 00000000692e0b51 (&dup_mmap_sem){++++}, at: copy_process+0x3041/0x8860 kernel/fork.c:1917 2 locks held by rs:main Q:Reg/7977: 1 lock held by rsyslogd/7979: #0: 000000008da73540 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1b3/0x1f0 fs/file.c:795 2 locks held by getty/8070: #0: 00000000633a6349 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000aefe7b79 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 2 locks held by getty/8071: #0: 00000000937c55ae (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000b155ed39 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 2 locks held by getty/8072: #0: 0000000039554f4e (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 000000004915d2d1 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 2 locks held by getty/8073: #0: 0000000034a0cb9d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 000000003d3ac6a5 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 2 locks held by getty/8074: #0: 0000000036464ae5 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 0000000014640e50 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 2 locks held by getty/8075: #0: 000000006f8a9a06 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000e0c46b11 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 2 locks held by getty/8076: #0: 00000000e9ba3705 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 000000004135958b (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 1 lock held by syz-executor5/12286: #0: 00000000692e0b51 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:472 [inline] #0: 00000000692e0b51 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1320 [inline] #0: 00000000692e0b51 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1375 [inline] #0: 00000000692e0b51 (&dup_mmap_sem){++++}, at: copy_process+0x3041/0x8860 kernel/fork.c:1917 1 lock held by syz-executor0/19339: #0: 00000000692e0b51 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:472 [inline] #0: 00000000692e0b51 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1320 [inline] #0: 00000000692e0b51 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1375 [inline] #0: 00000000692e0b51 (&dup_mmap_sem){++++}, at: copy_process+0x3041/0x8860 kernel/fork.c:1917 1 lock held by syz-executor2/21337: #0: 00000000692e0b51 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:472 [inline] #0: 00000000692e0b51 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1320 [inline] #0: 00000000692e0b51 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1375 [inline] #0: 00000000692e0b51 (&dup_mmap_sem){++++}, at: copy_process+0x3041/0x8860 kernel/fork.c:1917 1 lock held by syz-executor1/22883: #0: 00000000692e0b51 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:472 [inline] #0: 00000000692e0b51 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1320 [inline] #0: 00000000692e0b51 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1375 [inline] #0: 00000000692e0b51 (&dup_mmap_sem){++++}, at: copy_process+0x3041/0x8860 kernel/fork.c:1917 1 lock held by syz-executor0/24046: #0: 00000000692e0b51 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:472 [inline] #0: 00000000692e0b51 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1320 [inline] #0: 00000000692e0b51 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1375 [inline] #0: 00000000692e0b51 (&dup_mmap_sem){++++}, at: copy_process+0x3041/0x8860 kernel/fork.c:1917 1 lock held by syz-executor4/25806: #0: 00000000692e0b51 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:472 [inline] #0: 00000000692e0b51 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1320 [inline] #0: 00000000692e0b51 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1375 [inline] #0: 00000000692e0b51 (&dup_mmap_sem){++++}, at: copy_process+0x3041/0x8860 kernel/fork.c:1917 1 lock held by udevd/25918: #0: 00000000692e0b51 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:472 [inline] #0: 00000000692e0b51 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1320 [inline] #0: 00000000692e0b51 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1375 [inline] #0: 00000000692e0b51 (&dup_mmap_sem){++++}, at: copy_process+0x3041/0x8860 kernel/fork.c:1917 1 lock held by udevd/26439: #0: 00000000692e0b51 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:472 [inline] #0: 00000000692e0b51 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1320 [inline] #0: 00000000692e0b51 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1375 [inline] #0: 00000000692e0b51 (&dup_mmap_sem){++++}, at: copy_process+0x3041/0x8860 kernel/fork.c:1917 5 locks held by syz-executor3/27328: #0: 00000000081e010e (&sig->cred_guard_mutex){+.+.}, at: __do_sys_perf_event_open+0x9c3/0x2f00 kernel/events/core.c:10511 #1: 00000000d7cb53ad (&pmus_srcu){....}, at: perf_event_alloc.part.0+0x10c1/0x3520 kernel/events/core.c:10070 #2: 000000002c55ff24 (event_mutex){+.+.}, at: perf_uprobe_init+0x1d0/0x290 kernel/trace/trace_event_perf.c:328 #3: 0000000078e79c74 (&uprobe->register_rwsem){+.+.}, at: __uprobe_register kernel/events/uprobes.c:1140 [inline] #3: 0000000078e79c74 (&uprobe->register_rwsem){+.+.}, at: __uprobe_register+0x465/0x8e0 kernel/events/uprobes.c:1112 #4: 00000000692e0b51 (&dup_mmap_sem){++++}, at: percpu_down_write+0x9a/0x540 kernel/locking/percpu-rwsem.c:145 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1037 Comm: khungtaskd Not tainted 5.0.0-rc4+ #55 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1db/0x2d0 lib/dump_stack.c:113 nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1be/0x236 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0xbbb/0x1170 kernel/hung_task.c:287 kthread+0x357/0x430 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 1 to CPUs 0: INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.315 msecs NMI backtrace for cpu 0 CPU: 0 PID: 7977 Comm: rs:main Q:Reg Not tainted 5.0.0-rc4+ #55 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:update_stack_state+0x447/0x680 arch/x86/kernel/unwind_frame.c:218 Code: 00 48 c7 85 48 ff ff ff 00 00 00 00 e9 08 fd ff ff 49 8d 7f 38 48 b8 00 00 00 00 00 fc ff df 48 89 f9 48 c1 e9 03 80 3c 01 00 <0f> 85 85 01 00 00 49 8b 47 38 48 83 c0 10 48 89 85 30 ff ff ff e9 RSP: 0018:ffff8880a8dff020 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: ffff8880a8dff210 RCX: 1ffff110151bfe49 RDX: 1ffff110151bfe2c RSI: ffff8880a8dffbc8 RDI: ffff8880a8dff248 RBP: ffff8880a8dff108 R08: 0000000000000001 R09: ffff8880a8dff260 R10: ffff8880a8dff238 R11: ffff8880a8dff248 R12: 1ffff110151bfe28 R13: ffff8880a8dffbc8 R14: 1ffff110151bfe2c R15: ffff8880a8dff210 FS: 00007fb614d6a700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c4304353c8 CR3: 00000000868bf000 CR4: 00000000001426f0 Call Trace: unwind_next_frame.part.0+0x1ae/0xa90 arch/x86/kernel/unwind_frame.c:329 unwind_next_frame+0x3b/0x50 arch/x86/kernel/unwind_frame.c:287 __save_stack_trace+0x7a/0xf0 arch/x86/kernel/stacktrace.c:44 save_stack_trace+0x1a/0x20 arch/x86/kernel/stacktrace.c:60 save_stack+0x45/0xd0 mm/kasan/common.c:73 set_track mm/kasan/common.c:85 [inline] __kasan_kmalloc mm/kasan/common.c:496 [inline] __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:469 kasan_kmalloc mm/kasan/common.c:504 [inline] kasan_slab_alloc+0xf/0x20 mm/kasan/common.c:411 kmem_cache_alloc+0x12d/0x710 mm/slab.c:3543 mempool_alloc_slab+0x47/0x60 mm/mempool.c:505 mempool_alloc+0x19f/0x500 mm/mempool.c:385 bio_alloc_bioset+0x3c1/0x720 block/bio.c:489 bio_alloc include/linux/bio.h:393 [inline] blkdev_issue_flush+0xcd/0x300 block/blk-flush.c:446 ext4_sync_file+0xba9/0x14d0 fs/ext4/fsync.c:162 vfs_fsync_range+0x144/0x230 fs/sync.c:197 generic_write_sync include/linux/fs.h:2787 [inline] ext4_file_write_iter+0x67f/0x1410 fs/ext4/file.c:270 call_write_iter include/linux/fs.h:1863 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x764/0xb40 fs/read_write.c:487 vfs_write+0x20c/0x580 fs/read_write.c:549 ksys_write+0x105/0x260 fs/read_write.c:598 __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __x64_sys_write+0x73/0xb0 fs/read_write.c:607 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fb6167c819d Code: d1 20 00 00 75 10 b8 01 00 00 00 0f 05 48 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 be fa ff ff 48 89 04 24 b8 01 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 07 fb ff ff 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007fb614d69000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000371 RCX: 00007fb6167c819d RDX: 0000000000000371 RSI: 000000000106cce0 RDI: 0000000000000007 RBP: 000000000106cce0 R08: 33303920205b203a R09: 5d3535393038392e R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 00007fb614d69480 R14: 000000000000001c R15: 000000000106cae0