protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_1 INFO: task syz-executor.0:7988 blocked for more than 140 seconds. Not tainted 5.0.0-rc8+ #3 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D24048 7988 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2844 [inline] __schedule+0x817/0x1cc0 kernel/sched/core.c:3485 schedule+0x92/0x180 kernel/sched/core.c:3529 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:287 [inline] rwsem_down_read_failed+0x213/0x420 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+0x8d/0xf0 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.part.0+0x2b94/0x79a0 kernel/fork.c:1917 copy_process kernel/fork.c:1710 [inline] _do_fork+0x257/0xfe0 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+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4563fa Code: Bad RIP value. RSP: 002b:00007ffec9ec9bc0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffec9ec9bc0 RCX: 00000000004563fa RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffec9ec9c00 R08: 0000000000000001 R09: 0000000001831940 R10: 0000000001831c10 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 INFO: task syz-executor.1:7991 blocked for more than 140 seconds. Not tainted 5.0.0-rc8+ #3 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D24000 7991 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2844 [inline] __schedule+0x817/0x1cc0 kernel/sched/core.c:3485 schedule+0x92/0x180 kernel/sched/core.c:3529 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:287 [inline] rwsem_down_read_failed+0x213/0x420 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+0x8d/0xf0 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.part.0+0x2b94/0x79a0 kernel/fork.c:1917 copy_process kernel/fork.c:1710 [inline] _do_fork+0x257/0xfe0 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+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4563fa Code: Bad RIP value. RSP: 002b:00007ffc781db9f0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffc781db9f0 RCX: 00000000004563fa RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffc781dba30 R08: 0000000000000001 R09: 0000000000b50940 R10: 0000000000b50c10 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001 INFO: task syz-executor.4:8000 blocked for more than 140 seconds. Not tainted 5.0.0-rc8+ #3 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D24000 8000 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2844 [inline] __schedule+0x817/0x1cc0 kernel/sched/core.c:3485 schedule+0x92/0x180 kernel/sched/core.c:3529 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:287 [inline] rwsem_down_read_failed+0x213/0x420 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+0x8d/0xf0 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.part.0+0x2b94/0x79a0 kernel/fork.c:1917 copy_process kernel/fork.c:1710 [inline] _do_fork+0x257/0xfe0 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+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4563fa Code: Bad RIP value. RSP: 002b:00007ffe8f1c2f80 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffe8f1c2f80 RCX: 00000000004563fa RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffe8f1c2fc0 R08: 0000000000000001 R09: 00000000017ee940 R10: 00000000017eec10 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000004 INFO: task udevd:8438 blocked for more than 140 seconds. Not tainted 5.0.0-rc8+ #3 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. udevd D27200 8438 3867 0x00000000 Call Trace: context_switch kernel/sched/core.c:2844 [inline] __schedule+0x817/0x1cc0 kernel/sched/core.c:3485 schedule+0x92/0x180 kernel/sched/core.c:3529 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:287 [inline] rwsem_down_read_failed+0x213/0x420 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+0x8d/0xf0 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.part.0+0x2b94/0x79a0 kernel/fork.c:1917 copy_process kernel/fork.c:1710 [inline] _do_fork+0x257/0xfe0 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+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f6b1dbd6f46 Code: Bad RIP value. RSP: 002b:00007ffe44911730 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffe44911730 RCX: 00007f6b1dbd6f46 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffe44911790 R08: 00000000000020f6 R09: 00000000000020f6 R10: 00007f6b1e4f3a70 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe44911750 R14: 0000000000000005 R15: 0000000000000005 INFO: task udevd:8445 blocked for more than 140 seconds. Not tainted 5.0.0-rc8+ #3 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. udevd D27896 8445 3867 0x00000000 Call Trace: context_switch kernel/sched/core.c:2844 [inline] __schedule+0x817/0x1cc0 kernel/sched/core.c:3485 schedule+0x92/0x180 kernel/sched/core.c:3529 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:287 [inline] rwsem_down_read_failed+0x213/0x420 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+0x8d/0xf0 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.part.0+0x2b94/0x79a0 kernel/fork.c:1917 copy_process kernel/fork.c:1710 [inline] _do_fork+0x257/0xfe0 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+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f6b1dbd6f46 Code: Bad RIP value. RSP: 002b:00007ffe44911730 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffe44911730 RCX: 00007f6b1dbd6f46 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffe44911790 R08: 00000000000020fd R09: 00000000000020fd R10: 00007f6b1e4f3a70 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe44911750 R14: 0000000000000005 R15: 0000000000000005 INFO: task syz-executor.3:14769 blocked for more than 140 seconds. Not tainted 5.0.0-rc8+ #3 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D24000 14769 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2844 [inline] __schedule+0x817/0x1cc0 kernel/sched/core.c:3485 schedule+0x92/0x180 kernel/sched/core.c:3529 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:287 [inline] rwsem_down_read_failed+0x213/0x420 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+0x8d/0xf0 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.part.0+0x2b94/0x79a0 kernel/fork.c:1917 copy_process kernel/fork.c:1710 [inline] _do_fork+0x257/0xfe0 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+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4563fa Code: Bad RIP value. RSP: 002b:00007ffc29e3c0e0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffc29e3c0e0 RCX: 00000000004563fa RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffc29e3c120 R08: 0000000000000001 R09: 00000000019a6940 R10: 00000000019a6c10 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000003 INFO: task syz-executor.5:18051 blocked for more than 140 seconds. Not tainted 5.0.0-rc8+ #3 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D26912 18051 8004 0x00000004 Call Trace: context_switch kernel/sched/core.c:2844 [inline] __schedule+0x817/0x1cc0 kernel/sched/core.c:3485 schedule+0x92/0x180 kernel/sched/core.c:3529 percpu_down_write+0x342/0x440 kernel/locking/percpu-rwsem.c:162 register_for_each_vma+0x8c/0xde0 kernel/events/uprobes.c:1012 __uprobe_register kernel/events/uprobes.c:1144 [inline] __uprobe_register+0x464/0x7d0 kernel/events/uprobes.c:1112 uprobe_register+0x28/0x30 kernel/events/uprobes.c:1159 probe_event_enable+0x474/0xc40 kernel/trace/trace_uprobe.c:931 trace_uprobe_register+0x4ba/0x960 kernel/trace/trace_uprobe.c:1207 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+0x1db/0x290 kernel/trace/trace_event_perf.c:329 perf_uprobe_event_init+0x106/0x1a0 kernel/events/core.c:8511 perf_try_init_event+0x137/0x2f0 kernel/events/core.c:9786 perf_init_event kernel/events/core.c:9817 [inline] perf_event_alloc.part.0+0x1d08/0x2e00 kernel/events/core.c:10090 perf_event_alloc kernel/events/core.c:10446 [inline] __do_sys_perf_event_open+0x842/0x2690 kernel/events/core.c:10547 __se_sys_perf_event_open kernel/events/core.c:10436 [inline] __x64_sys_perf_event_open+0xbe/0x150 kernel/events/core.c:10436 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457e29 Code: Bad RIP value. RSP: 002b:00007f4fc93d5c78 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000457e29 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000180 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 00007f4fc93d66d4 R13: 00000000004c4491 R14: 00000000004d7bf8 R15: 00000000ffffffff INFO: task syz-executor.2:18060 blocked for more than 140 seconds. Not tainted 5.0.0-rc8+ #3 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D28544 18060 7993 0x00000004 Call Trace: context_switch kernel/sched/core.c:2844 [inline] __schedule+0x817/0x1cc0 kernel/sched/core.c:3485 schedule+0x92/0x180 kernel/sched/core.c:3529 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3587 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x726/0x1310 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 perf_trace_init+0x58/0x250 kernel/trace/trace_event_perf.c:218 perf_tp_event_init+0xa6/0x120 kernel/events/core.c:8360 perf_try_init_event+0x137/0x2f0 kernel/events/core.c:9786 perf_init_event kernel/events/core.c:9824 [inline] perf_event_alloc.part.0+0xf98/0x2e00 kernel/events/core.c:10090 perf_event_alloc kernel/events/core.c:10446 [inline] __do_sys_perf_event_open+0x842/0x2690 kernel/events/core.c:10547 __se_sys_perf_event_open kernel/events/core.c:10436 [inline] __x64_sys_perf_event_open+0xbe/0x150 kernel/events/core.c:10436 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457e29 Code: Bad RIP value. RSP: 002b:00007f5d8cd55c78 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000457e29 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000204e7000 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 00007f5d8cd566d4 R13: 00000000004c4491 R14: 00000000004d7bf8 R15: 00000000ffffffff Showing all locks held in the system: 1 lock held by khungtaskd/1040: #0: 000000004047c408 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:4389 3 locks held by rs:main Q:Reg/7823: #0: 00000000f0a3193a (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 fs/file.c:795 #1: 000000004047c408 (rcu_read_lock){....}, at: perf_iterate_sb+0x0/0xa10 kernel/events/core.c:4145 #2: 0000000007153c34 (&sb->s_type->i_mutex_key#9){++++}, at: inode_lock include/linux/fs.h:757 [inline] #2: 0000000007153c34 (&sb->s_type->i_mutex_key#9){++++}, at: __generic_file_fsync+0xb5/0x200 fs/libfs.c:981 1 lock held by rsyslogd/7825: #0: 00000000baf8ff10 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 fs/file.c:795 2 locks held by getty/7947: #0: 000000009dda43ee (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000e81a6639 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/7948: #0: 0000000058e8b541 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000e8bdaa34 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/7949: #0: 000000008a55a202 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000c9a01c0b (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/7950: #0: 000000008241efa5 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 000000000c73b476 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/7951: #0: 00000000fa6defda (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 000000008fa04b10 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/7952: #0: 000000005fbe27d7 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 0000000005caba87 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/7953: #0: 00000000425bf679 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 000000008b5ed664 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 1 lock held by syz-executor.0/7988: #0: 000000009b45241c (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:472 [inline] #0: 000000009b45241c (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1320 [inline] #0: 000000009b45241c (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1375 [inline] #0: 000000009b45241c (&dup_mmap_sem){++++}, at: copy_process.part.0+0x2b94/0x79a0 kernel/fork.c:1917 1 lock held by syz-executor.1/7991: #0: 000000009b45241c (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:472 [inline] #0: 000000009b45241c (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1320 [inline] #0: 000000009b45241c (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1375 [inline] #0: 000000009b45241c (&dup_mmap_sem){++++}, at: copy_process.part.0+0x2b94/0x79a0 kernel/fork.c:1917 1 lock held by syz-executor.4/8000: #0: 000000009b45241c (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:472 [inline] #0: 000000009b45241c (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1320 [inline] #0: 000000009b45241c (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1375 [inline] #0: 000000009b45241c (&dup_mmap_sem){++++}, at: copy_process.part.0+0x2b94/0x79a0 kernel/fork.c:1917 1 lock held by udevd/8438: #0: 000000009b45241c (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:472 [inline] #0: 000000009b45241c (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1320 [inline] #0: 000000009b45241c (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1375 [inline] #0: 000000009b45241c (&dup_mmap_sem){++++}, at: copy_process.part.0+0x2b94/0x79a0 kernel/fork.c:1917 1 lock held by udevd/8445: #0: 000000009b45241c (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:472 [inline] #0: 000000009b45241c (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1320 [inline] #0: 000000009b45241c (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1375 [inline] #0: 000000009b45241c (&dup_mmap_sem){++++}, at: copy_process.part.0+0x2b94/0x79a0 kernel/fork.c:1917 1 lock held by syz-executor.5/26499: #0: 000000008a3f1a40 (event_mutex){+.+.}, at: perf_trace_destroy+0x28/0x100 kernel/trace/trace_event_perf.c:236 1 lock held by syz-executor.5/6295: #0: 000000008a3f1a40 (event_mutex){+.+.}, at: perf_trace_destroy+0x28/0x100 kernel/trace/trace_event_perf.c:236 1 lock held by syz-executor.3/14769: #0: 000000009b45241c (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:472 [inline] #0: 000000009b45241c (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1320 [inline] #0: 000000009b45241c (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1375 [inline] #0: 000000009b45241c (&dup_mmap_sem){++++}, at: copy_process.part.0+0x2b94/0x79a0 kernel/fork.c:1917 1 lock held by syz-executor.0/17612: #0: 000000009b45241c (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:472 [inline] #0: 000000009b45241c (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1320 [inline] #0: 000000009b45241c (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1375 [inline] #0: 000000009b45241c (&dup_mmap_sem){++++}, at: copy_process.part.0+0x2b94/0x79a0 kernel/fork.c:1917 5 locks held by syz-executor.5/18051: #0: 000000001d8d7dd8 (&sig->cred_guard_mutex){+.+.}, at: __do_sys_perf_event_open+0x6e1/0x2690 kernel/events/core.c:10527 #1: 00000000361360a6 (&pmus_srcu){....}, at: perf_event_alloc.part.0+0xd56/0x2e00 kernel/events/core.c:10086 #2: 000000008a3f1a40 (event_mutex){+.+.}, at: perf_uprobe_init+0x1d0/0x290 kernel/trace/trace_event_perf.c:328 #3: 00000000d07c0cd7 (&uprobe->register_rwsem){+.+.}, at: __uprobe_register kernel/events/uprobes.c:1140 [inline] #3: 00000000d07c0cd7 (&uprobe->register_rwsem){+.+.}, at: __uprobe_register+0x3d3/0x7d0 kernel/events/uprobes.c:1112 #4: 000000009b45241c (&dup_mmap_sem){++++}, at: percpu_down_write+0x6a/0x440 kernel/locking/percpu-rwsem.c:145 3 locks held by syz-executor.2/18060: #0: 00000000b559c3ce (&sig->cred_guard_mutex){+.+.}, at: __do_sys_perf_event_open+0x6e1/0x2690 kernel/events/core.c:10527 #1: 00000000361360a6 (&pmus_srcu){....}, at: perf_event_alloc.part.0+0xd56/0x2e00 kernel/events/core.c:10086 #2: 000000008a3f1a40 (event_mutex){+.+.}, at: perf_trace_init+0x58/0x250 kernel/trace/trace_event_perf.c:218 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1040 Comm: khungtaskd Not tainted 5.0.0-rc8+ #3 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:203 [inline] watchdog+0x9df/0xee0 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 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at native_safe_halt+0x2/0x10 arch/x86/include/asm/irqflags.h:57