INFO: task udevd:7906 blocked for more than 143 seconds. Not tainted 5.1.0-rc1+ #34 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. udevd D27032 7906 3876 0x00000000 Call Trace: context_switch kernel/sched/core.c:2877 [inline] __schedule+0x817/0x1cc0 kernel/sched/core.c:3518 schedule+0x92/0x180 kernel/sched/core.c:3562 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:285 [inline] rwsem_down_read_failed+0x213/0x420 kernel/locking/rwsem-xadd.c:302 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+0x8d/0xf0 kernel/locking/percpu-rwsem.c:41 percpu_down_read include/linux/percpu-rwsem.h:49 [inline] uprobe_start_dup_mmap+0xbf/0xe0 kernel/events/uprobes.c:1512 dup_mmap kernel/fork.c:471 [inline] dup_mm kernel/fork.c:1319 [inline] copy_mm kernel/fork.c:1374 [inline] copy_process.part.0+0x2b94/0x7980 kernel/fork.c:1916 copy_process kernel/fork.c:1709 [inline] _do_fork+0x257/0xfd0 kernel/fork.c:2226 __do_sys_clone kernel/fork.c:2333 [inline] __se_sys_clone kernel/fork.c:2327 [inline] __x64_sys_clone+0xbf/0x150 kernel/fork.c:2327 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7ff03d0a5f46 Code: Bad RIP value. RSP: 002b:00007fffc69371a0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007fffc69371a0 RCX: 00007ff03d0a5f46 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007fffc6937200 R08: 0000000000001ee2 R09: 0000000000001ee2 R10: 00007ff03d9c2a70 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffc69371c0 R14: 0000000000000005 R15: 0000000000000005 INFO: task udevd:7907 blocked for more than 143 seconds. Not tainted 5.1.0-rc1+ #34 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. udevd D27592 7907 3876 0x00000000 Call Trace: context_switch kernel/sched/core.c:2877 [inline] __schedule+0x817/0x1cc0 kernel/sched/core.c:3518 schedule+0x92/0x180 kernel/sched/core.c:3562 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:285 [inline] rwsem_down_read_failed+0x213/0x420 kernel/locking/rwsem-xadd.c:302 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+0x8d/0xf0 kernel/locking/percpu-rwsem.c:41 percpu_down_read include/linux/percpu-rwsem.h:49 [inline] uprobe_start_dup_mmap+0xbf/0xe0 kernel/events/uprobes.c:1512 dup_mmap kernel/fork.c:471 [inline] dup_mm kernel/fork.c:1319 [inline] copy_mm kernel/fork.c:1374 [inline] copy_process.part.0+0x2b94/0x7980 kernel/fork.c:1916 copy_process kernel/fork.c:1709 [inline] _do_fork+0x257/0xfd0 kernel/fork.c:2226 __do_sys_clone kernel/fork.c:2333 [inline] __se_sys_clone kernel/fork.c:2327 [inline] __x64_sys_clone+0xbf/0x150 kernel/fork.c:2327 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7ff03d0a5f46 Code: Bad RIP value. RSP: 002b:00007fffc69371a0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007fffc69371a0 RCX: 00007ff03d0a5f46 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007fffc6937200 R08: 0000000000001ee3 R09: 0000000000001ee3 R10: 00007ff03d9c2a70 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffc69371c0 R14: 0000000000000005 R15: 0000000000000005 INFO: task syz-executor.1:7939 blocked for more than 143 seconds. Not tainted 5.1.0-rc1+ #34 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D24176 7939 1 0x00000006 Call Trace: context_switch kernel/sched/core.c:2877 [inline] __schedule+0x817/0x1cc0 kernel/sched/core.c:3518 schedule+0x92/0x180 kernel/sched/core.c:3562 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:285 [inline] rwsem_down_read_failed+0x213/0x420 kernel/locking/rwsem-xadd.c:302 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+0x8d/0xf0 kernel/locking/percpu-rwsem.c:41 percpu_down_read include/linux/percpu-rwsem.h:49 [inline] uprobe_start_dup_mmap+0xbf/0xe0 kernel/events/uprobes.c:1512 dup_mmap kernel/fork.c:471 [inline] dup_mm kernel/fork.c:1319 [inline] copy_mm kernel/fork.c:1374 [inline] copy_process.part.0+0x2b94/0x7980 kernel/fork.c:1916 copy_process kernel/fork.c:1709 [inline] _do_fork+0x257/0xfd0 kernel/fork.c:2226 __do_sys_clone kernel/fork.c:2333 [inline] __se_sys_clone kernel/fork.c:2327 [inline] __x64_sys_clone+0xbf/0x150 kernel/fork.c:2327 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4567da Code: Bad RIP value. RSP: 002b:00007fff81d6a480 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007fff81d6a480 RCX: 00000000004567da RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007fff81d6a4c0 R08: 0000000000000001 R09: 000000000260f940 R10: 000000000260fc10 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: 00007fff81d6a510 INFO: task syz-executor.2:7942 blocked for more than 144 seconds. Not tainted 5.1.0-rc1+ #34 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D24176 7942 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2877 [inline] __schedule+0x817/0x1cc0 kernel/sched/core.c:3518 schedule+0x92/0x180 kernel/sched/core.c:3562 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:285 [inline] rwsem_down_read_failed+0x213/0x420 kernel/locking/rwsem-xadd.c:302 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+0x8d/0xf0 kernel/locking/percpu-rwsem.c:41 percpu_down_read include/linux/percpu-rwsem.h:49 [inline] uprobe_start_dup_mmap+0xbf/0xe0 kernel/events/uprobes.c:1512 dup_mmap kernel/fork.c:471 [inline] dup_mm kernel/fork.c:1319 [inline] copy_mm kernel/fork.c:1374 [inline] copy_process.part.0+0x2b94/0x7980 kernel/fork.c:1916 copy_process kernel/fork.c:1709 [inline] _do_fork+0x257/0xfd0 kernel/fork.c:2226 __do_sys_clone kernel/fork.c:2333 [inline] __se_sys_clone kernel/fork.c:2327 [inline] __x64_sys_clone+0xbf/0x150 kernel/fork.c:2327 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4567da Code: Bad RIP value. RSP: 002b:00007ffce6917ec0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffce6917ec0 RCX: 00000000004567da RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffce6917f00 R08: 0000000000000001 R09: 0000000001b50940 R10: 0000000001b50c10 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: 00007ffce6917f50 INFO: task syz-executor.3:7945 blocked for more than 144 seconds. Not tainted 5.1.0-rc1+ #34 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D24344 7945 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2877 [inline] __schedule+0x817/0x1cc0 kernel/sched/core.c:3518 schedule+0x92/0x180 kernel/sched/core.c:3562 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:285 [inline] rwsem_down_read_failed+0x213/0x420 kernel/locking/rwsem-xadd.c:302 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+0x8d/0xf0 kernel/locking/percpu-rwsem.c:41 percpu_down_read include/linux/percpu-rwsem.h:49 [inline] uprobe_start_dup_mmap+0xbf/0xe0 kernel/events/uprobes.c:1512 dup_mmap kernel/fork.c:471 [inline] dup_mm kernel/fork.c:1319 [inline] copy_mm kernel/fork.c:1374 [inline] copy_process.part.0+0x2b94/0x7980 kernel/fork.c:1916 copy_process kernel/fork.c:1709 [inline] _do_fork+0x257/0xfd0 kernel/fork.c:2226 __do_sys_clone kernel/fork.c:2333 [inline] __se_sys_clone kernel/fork.c:2327 [inline] __x64_sys_clone+0xbf/0x150 kernel/fork.c:2327 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4567da Code: Bad RIP value. RSP: 002b:00007ffc13534700 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffc13534700 RCX: 00000000004567da RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffc13534740 R08: 0000000000000001 R09: 000000000180d940 R10: 000000000180dc10 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: 00007ffc13534790 INFO: task syz-executor.4:7949 blocked for more than 144 seconds. Not tainted 5.1.0-rc1+ #34 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D24176 7949 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2877 [inline] __schedule+0x817/0x1cc0 kernel/sched/core.c:3518 schedule+0x92/0x180 kernel/sched/core.c:3562 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:285 [inline] rwsem_down_read_failed+0x213/0x420 kernel/locking/rwsem-xadd.c:302 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+0x8d/0xf0 kernel/locking/percpu-rwsem.c:41 percpu_down_read include/linux/percpu-rwsem.h:49 [inline] uprobe_start_dup_mmap+0xbf/0xe0 kernel/events/uprobes.c:1512 dup_mmap kernel/fork.c:471 [inline] dup_mm kernel/fork.c:1319 [inline] copy_mm kernel/fork.c:1374 [inline] copy_process.part.0+0x2b94/0x7980 kernel/fork.c:1916 copy_process kernel/fork.c:1709 [inline] _do_fork+0x257/0xfd0 kernel/fork.c:2226 __do_sys_clone kernel/fork.c:2333 [inline] __se_sys_clone kernel/fork.c:2327 [inline] __x64_sys_clone+0xbf/0x150 kernel/fork.c:2327 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4567da Code: Bad RIP value. RSP: 002b:00007ffce5f4c2e0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffce5f4c2e0 RCX: 00000000004567da RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffce5f4c320 R08: 0000000000000001 R09: 00000000010ba940 R10: 00000000010bac10 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: 00007ffce5f4c370 INFO: task syz-executor.5:7951 blocked for more than 144 seconds. Not tainted 5.1.0-rc1+ #34 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D24176 7951 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2877 [inline] __schedule+0x817/0x1cc0 kernel/sched/core.c:3518 schedule+0x92/0x180 kernel/sched/core.c:3562 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:285 [inline] rwsem_down_read_failed+0x213/0x420 kernel/locking/rwsem-xadd.c:302 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+0x8d/0xf0 kernel/locking/percpu-rwsem.c:41 percpu_down_read include/linux/percpu-rwsem.h:49 [inline] uprobe_start_dup_mmap+0xbf/0xe0 kernel/events/uprobes.c:1512 dup_mmap kernel/fork.c:471 [inline] dup_mm kernel/fork.c:1319 [inline] copy_mm kernel/fork.c:1374 [inline] copy_process.part.0+0x2b94/0x7980 kernel/fork.c:1916 copy_process kernel/fork.c:1709 [inline] _do_fork+0x257/0xfd0 kernel/fork.c:2226 __do_sys_clone kernel/fork.c:2333 [inline] __se_sys_clone kernel/fork.c:2327 [inline] __x64_sys_clone+0xbf/0x150 kernel/fork.c:2327 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4567da Code: Bad RIP value. RSP: 002b:00007fff8ef00fc0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007fff8ef00fc0 RCX: 00000000004567da RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007fff8ef01000 R08: 0000000000000001 R09: 000000000231f940 R10: 000000000231fc10 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: 00007fff8ef01050 INFO: task syz-executor.0:20560 blocked for more than 145 seconds. Not tainted 5.1.0-rc1+ #34 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D27008 20560 7936 0x00000004 Call Trace: context_switch kernel/sched/core.c:2877 [inline] __schedule+0x817/0x1cc0 kernel/sched/core.c:3518 schedule+0x92/0x180 kernel/sched/core.c:3562 percpu_down_write+0x342/0x440 kernel/locking/percpu-rwsem.c:162 register_for_each_vma+0x8c/0xde0 kernel/events/uprobes.c:999 __uprobe_register kernel/events/uprobes.c:1131 [inline] __uprobe_register+0x45a/0x7c0 kernel/events/uprobes.c:1099 uprobe_register_refctr+0x2e/0x40 kernel/events/uprobes.c:1153 probe_event_enable+0x51d/0xc40 kernel/trace/trace_uprobe.c:926 trace_uprobe_register+0x7a/0x970 kernel/trace/trace_uprobe.c:1205 perf_trace_event_reg kernel/trace/trace_event_perf.c:124 [inline] perf_trace_event_init+0x500/0x990 kernel/trace/trace_event_perf.c:199 perf_uprobe_init+0x16e/0x210 kernel/trace/trace_event_perf.c:327 perf_uprobe_event_init+0x106/0x1a0 kernel/events/core.c:8742 perf_try_init_event+0x137/0x3f0 kernel/events/core.c:10011 perf_init_event kernel/events/core.c:10051 [inline] perf_event_alloc.part.0+0x1f2f/0x3200 kernel/events/core.c:10328 perf_event_alloc kernel/events/core.c:10698 [inline] __do_sys_perf_event_open+0x830/0x24e0 kernel/events/core.c:10799 __se_sys_perf_event_open kernel/events/core.c:10688 [inline] __x64_sys_perf_event_open+0xbe/0x150 kernel/events/core.c:10688 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458209 Code: Bad RIP value. RSP: 002b:00007f2c8b48cc78 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000458209 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000180 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 00007f2c8b48d6d4 R13: 00000000004c47ec R14: 00000000004d7f90 R15: 00000000ffffffff Showing all locks held in the system: 1 lock held by khungtaskd/1042: #0: 00000000b2167e35 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:5061 2 locks held by rs:main Q:Reg/7806: 1 lock held by rsyslogd/7808: #0: 000000002a5a72f5 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 fs/file.c:801 2 locks held by getty/7898: #0: 000000006121036a (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000910420f6 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/7899: #0: 0000000008fe7739 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 0000000018514d3a (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/7900: #0: 00000000a4ad5a66 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 0000000077c1aed5 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/7901: #0: 00000000ff630e7d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000fc475054 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/7902: #0: 00000000a3aae5a3 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000016fef73 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/7903: #0: 00000000138a1b68 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000671555e4 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/7904: #0: 00000000b34fd462 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000187ab4f0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 1 lock held by udevd/7906: #0: 00000000253a834f (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:471 [inline] #0: 00000000253a834f (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1319 [inline] #0: 00000000253a834f (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1374 [inline] #0: 00000000253a834f (&dup_mmap_sem){++++}, at: copy_process.part.0+0x2b94/0x7980 kernel/fork.c:1916 1 lock held by udevd/7907: #0: 00000000253a834f (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:471 [inline] #0: 00000000253a834f (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1319 [inline] #0: 00000000253a834f (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1374 [inline] #0: 00000000253a834f (&dup_mmap_sem){++++}, at: copy_process.part.0+0x2b94/0x7980 kernel/fork.c:1916 1 lock held by syz-executor.1/7939: #0: 00000000253a834f (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:471 [inline] #0: 00000000253a834f (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1319 [inline] #0: 00000000253a834f (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1374 [inline] #0: 00000000253a834f (&dup_mmap_sem){++++}, at: copy_process.part.0+0x2b94/0x7980 kernel/fork.c:1916 1 lock held by syz-executor.2/7942: #0: 00000000253a834f (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:471 [inline] #0: 00000000253a834f (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1319 [inline] #0: 00000000253a834f (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1374 [inline] #0: 00000000253a834f (&dup_mmap_sem){++++}, at: copy_process.part.0+0x2b94/0x7980 kernel/fork.c:1916 1 lock held by syz-executor.3/7945: #0: 00000000253a834f (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:471 [inline] #0: 00000000253a834f (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1319 [inline] #0: 00000000253a834f (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1374 [inline] #0: 00000000253a834f (&dup_mmap_sem){++++}, at: copy_process.part.0+0x2b94/0x7980 kernel/fork.c:1916 1 lock held by syz-executor.4/7949: #0: 00000000253a834f (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:471 [inline] #0: 00000000253a834f (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1319 [inline] #0: 00000000253a834f (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1374 [inline] #0: 00000000253a834f (&dup_mmap_sem){++++}, at: copy_process.part.0+0x2b94/0x7980 kernel/fork.c:1916 1 lock held by syz-executor.5/7951: #0: 00000000253a834f (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:471 [inline] #0: 00000000253a834f (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1319 [inline] #0: 00000000253a834f (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1374 [inline] #0: 00000000253a834f (&dup_mmap_sem){++++}, at: copy_process.part.0+0x2b94/0x7980 kernel/fork.c:1916 1 lock held by syz-executor.0/8420: #0: 00000000e0f08b16 (event_mutex){+.+.}, at: perf_trace_destroy+0x28/0x100 kernel/trace/trace_event_perf.c:236 2 locks held by kworker/u4:9/9062: #0: 00000000993799cd (&rq->lock){-.-.}, at: idle_balance kernel/sched/fair.c:10011 [inline] #0: 00000000993799cd (&rq->lock){-.-.}, at: pick_next_task_fair+0x1214/0x19a0 kernel/sched/fair.c:7062 #1: 00000000b2167e35 (rcu_read_lock){....}, at: __update_idle_core+0x45/0x3f0 kernel/sched/fair.c:6059 2 locks held by syz-executor.1/23693: #0: 00000000ea3db4bc (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 0000000003eb1797 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 1 lock held by syz-executor.3/25474: #0: 00000000253a834f (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:471 [inline] #0: 00000000253a834f (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1319 [inline] #0: 00000000253a834f (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1374 [inline] #0: 00000000253a834f (&dup_mmap_sem){++++}, at: copy_process.part.0+0x2b94/0x7980 kernel/fork.c:1916 5 locks held by syz-executor.0/20560: #0: 000000002b338204 (&sig->cred_guard_mutex){+.+.}, at: __do_sys_perf_event_open+0x6d2/0x24e0 kernel/events/core.c:10779 #1: 0000000021451754 (&pmus_srcu){....}, at: perf_event_alloc.part.0+0xd57/0x3200 kernel/events/core.c:10324 #2: 00000000e0f08b16 (event_mutex){+.+.}, at: perf_uprobe_init+0x163/0x210 kernel/trace/trace_event_perf.c:326 #3: 0000000065866773 (&uprobe->register_rwsem){+.+.}, at: __uprobe_register kernel/events/uprobes.c:1127 [inline] #3: 0000000065866773 (&uprobe->register_rwsem){+.+.}, at: __uprobe_register+0x3c9/0x7c0 kernel/events/uprobes.c:1099 #4: 00000000253a834f (&dup_mmap_sem){++++}, at: percpu_down_write+0x6a/0x440 kernel/locking/percpu-rwsem.c:145 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1042 Comm: khungtaskd Not tainted 5.1.0-rc1+ #34 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+0x172/0x1f0 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:204 [inline] watchdog+0x9b7/0xec0 kernel/hung_task.c:288 kthread+0x357/0x430 kernel/kthread.c:253 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 1 to CPUs 0: