INFO: task syz-executor:6335 blocked for more than 143 seconds.
      Not tainted syzkaller #0
      Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:21592 pid:6335  tgid:6335  ppid:1      task_flags:0x40054c flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5256 [inline]
 __schedule+0x14b8/0x4f90 kernel/sched/core.c:6863
 __schedule_loop kernel/sched/core.c:6945 [inline]
 schedule+0x161/0x360 kernel/sched/core.c:6960
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:7017
 rwsem_down_write_slowpath+0x916/0x1090 kernel/locking/rwsem.c:1185
 __down_write_common kernel/locking/rwsem.c:1317 [inline]
 __down_write kernel/locking/rwsem.c:1326 [inline]
 down_write+0x1a7/0x1f0 kernel/locking/rwsem.c:1591
 mmap_write_lock include/linux/mmap_lock.h:335 [inline]
 exit_mmap+0x277/0xae0 mm/mmap.c:1285
 __mmput+0x118/0x430 kernel/fork.c:1173
 exit_mm+0x1d6/0x2b0 kernel/exit.c:581
 do_exit+0x654/0x2300 kernel/exit.c:959
 do_group_exit+0x218/0x2d0 kernel/exit.c:1112
 get_signal+0x1259/0x1310 kernel/signal.c:3034
 arch_do_signal_or_restart+0x96/0x790 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:41 [inline]
 exit_to_user_mode_loop+0x83/0x490 kernel/entry/common.c:75
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
 do_syscall_64+0x23d/0x1340 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f4400f85897
RSP: 002b:00007ffe2a7a66f0 EFLAGS: 00000293 ORIG_RAX: 000000000000003d
RAX: fffffffffffffe00 RBX: 000000000000001f RCX: 00007f4400f85897
RDX: 0000000040000000 RSI: 00007ffe2a7a675c RDI: 00000000ffffffff
RBP: 00007ffe2a7a675c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 000000000000000e
R13: 0000555592a58590 R14: 0000000000026118 R15: 00007ffe2a7a67b0
 </TASK>
INFO: task syz-executor:6335 is blocked on an rw-semaphore, but the owner is not found.
INFO: task syz-executor:6339 blocked for more than 143 seconds.
      Not tainted syzkaller #0
      Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:20984 pid:6339  tgid:6339  ppid:1      task_flags:0x40054c flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5256 [inline]
 __schedule+0x14b8/0x4f90 kernel/sched/core.c:6863
 __schedule_loop kernel/sched/core.c:6945 [inline]
 schedule+0x161/0x360 kernel/sched/core.c:6960
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:7017
 rwsem_down_write_slowpath+0x916/0x1090 kernel/locking/rwsem.c:1185
 __down_write_common kernel/locking/rwsem.c:1317 [inline]
 __down_write kernel/locking/rwsem.c:1326 [inline]
 down_write+0x1a7/0x1f0 kernel/locking/rwsem.c:1591
 mmap_write_lock include/linux/mmap_lock.h:335 [inline]
 exit_mmap+0x277/0xae0 mm/mmap.c:1285
 __mmput+0x118/0x430 kernel/fork.c:1173
 exit_mm+0x1d6/0x2b0 kernel/exit.c:581
 do_exit+0x654/0x2300 kernel/exit.c:959
 do_group_exit+0x218/0x2d0 kernel/exit.c:1112
 get_signal+0x1259/0x1310 kernel/signal.c:3034
 arch_do_signal_or_restart+0x96/0x790 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:41 [inline]
 exit_to_user_mode_loop+0x83/0x490 kernel/entry/common.c:75
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
 do_syscall_64+0x23d/0x1340 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f7976785897
RSP: 002b:00007ffe9dc69ef0 EFLAGS: 00000293 ORIG_RAX: 000000000000003d
RAX: fffffffffffffe00 RBX: 0000000000000007 RCX: 00007f7976785897
RDX: 0000000040000000 RSI: 00007ffe9dc69f5c RDI: 00000000ffffffff
RBP: 00007ffe9dc69f5c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000002
R13: 00005555783bd590 R14: 00000000000261b8 R15: 00007ffe9dc69fb0
 </TASK>
INFO: task syz-executor:6339 is blocked on an rw-semaphore, but the owner is not found.
INFO: task syz-executor:6342 blocked for more than 144 seconds.
      Not tainted syzkaller #0
      Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:21120 pid:6342  tgid:6342  ppid:1      task_flags:0x40054c flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5256 [inline]
 __schedule+0x14b8/0x4f90 kernel/sched/core.c:6863
 __schedule_loop kernel/sched/core.c:6945 [inline]
 schedule+0x161/0x360 kernel/sched/core.c:6960
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:7017
 rwsem_down_write_slowpath+0x916/0x1090 kernel/locking/rwsem.c:1185
 __down_write_common kernel/locking/rwsem.c:1317 [inline]
 __down_write kernel/locking/rwsem.c:1326 [inline]
 down_write+0x1a7/0x1f0 kernel/locking/rwsem.c:1591
 mmap_write_lock include/linux/mmap_lock.h:335 [inline]
 exit_mmap+0x277/0xae0 mm/mmap.c:1285
 __mmput+0x118/0x430 kernel/fork.c:1173
 exit_mm+0x1d6/0x2b0 kernel/exit.c:581
 do_exit+0x654/0x2300 kernel/exit.c:959
 do_group_exit+0x218/0x2d0 kernel/exit.c:1112
 get_signal+0x1259/0x1310 kernel/signal.c:3034
 arch_do_signal_or_restart+0x96/0x790 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:41 [inline]
 exit_to_user_mode_loop+0x83/0x490 kernel/entry/common.c:75
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
 do_syscall_64+0x23d/0x1340 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7ff2f6585897
RSP: 002b:00007ffc2f2c7860 EFLAGS: 00000293 ORIG_RAX: 000000000000003d
RAX: fffffffffffffe00 RBX: 0000000000000003 RCX: 00007ff2f6585897
RDX: 0000000040000000 RSI: 00007ffc2f2c78cc RDI: 00000000ffffffff
RBP: 00007ffc2f2c78cc R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 0000555567676590 R14: 0000000000026171 R15: 00007ffc2f2c7920
 </TASK>
INFO: task syz-executor:6342 is blocked on an rw-semaphore, but the owner is not found.
INFO: task syz-executor:6343 blocked for more than 144 seconds.
      Not tainted syzkaller #0
      Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:21592 pid:6343  tgid:6343  ppid:1      task_flags:0x40054c flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5256 [inline]
 __schedule+0x14b8/0x4f90 kernel/sched/core.c:6863
 __schedule_loop kernel/sched/core.c:6945 [inline]
 schedule+0x161/0x360 kernel/sched/core.c:6960
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:7017
 rwsem_down_write_slowpath+0x916/0x1090 kernel/locking/rwsem.c:1185
 __down_write_common kernel/locking/rwsem.c:1317 [inline]
 __down_write kernel/locking/rwsem.c:1326 [inline]
 down_write+0x1a7/0x1f0 kernel/locking/rwsem.c:1591
 mmap_write_lock include/linux/mmap_lock.h:335 [inline]
 exit_mmap+0x277/0xae0 mm/mmap.c:1285
 __mmput+0x118/0x430 kernel/fork.c:1173
 exit_mm+0x1d6/0x2b0 kernel/exit.c:581
 do_exit+0x654/0x2300 kernel/exit.c:959
 do_group_exit+0x218/0x2d0 kernel/exit.c:1112
 get_signal+0x1259/0x1310 kernel/signal.c:3034
 arch_do_signal_or_restart+0x96/0x790 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:41 [inline]
 exit_to_user_mode_loop+0x83/0x490 kernel/entry/common.c:75
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
 do_syscall_64+0x23d/0x1340 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f9437785e93
RSP: 002b:00007fff8c322f08 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: fffffffffffffff4 RBX: 0000000000000000 RCX: 00007f9437785e93
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001
R10: 00005555653a47d0 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f94379b4280 R14: 0000000000000003 R15: 00007fff8c3230a0
 </TASK>
INFO: task syz-executor:6343 is blocked on an rw-semaphore, but the owner is not found.
INFO: task syz-executor:6344 blocked for more than 144 seconds.
      Not tainted syzkaller #0
      Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:21384 pid:6344  tgid:6344  ppid:1      task_flags:0x40054c flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5256 [inline]
 __schedule+0x14b8/0x4f90 kernel/sched/core.c:6863
 __schedule_loop kernel/sched/core.c:6945 [inline]
 schedule+0x161/0x360 kernel/sched/core.c:6960
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:7017
 rwsem_down_write_slowpath+0x916/0x1090 kernel/locking/rwsem.c:1185
 __down_write_common kernel/locking/rwsem.c:1317 [inline]
 __down_write kernel/locking/rwsem.c:1326 [inline]
 down_write+0x1a7/0x1f0 kernel/locking/rwsem.c:1591
 mmap_write_lock include/linux/mmap_lock.h:335 [inline]
 exit_mmap+0x277/0xae0 mm/mmap.c:1285
 __mmput+0x118/0x430 kernel/fork.c:1173
 exit_mm+0x1d6/0x2b0 kernel/exit.c:581
 do_exit+0x654/0x2300 kernel/exit.c:959
 do_group_exit+0x218/0x2d0 kernel/exit.c:1112
 get_signal+0x1259/0x1310 kernel/signal.c:3034
 arch_do_signal_or_restart+0x96/0x790 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:41 [inline]
 exit_to_user_mode_loop+0x83/0x490 kernel/entry/common.c:75
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
 do_syscall_64+0x23d/0x1340 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f5735985e93
RSP: 002b:00007ffeaa3a9758 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: fffffffffffffff4 RBX: 0000000000000000 RCX: 00007f5735985e93
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001
R10: 000055558d8f97d0 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5735bb4280 R14: 0000000000000003 R15: 00007ffeaa3a98f0
 </TASK>
INFO: task syz-executor:6344 is blocked on an rw-semaphore, but the owner is not found.
INFO: task syz.0.36:6555 blocked for more than 145 seconds.
      Not tainted syzkaller #0
      Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.36        state:D stack:25944 pid:6555  tgid:6555  ppid:6335   task_flags:0x40004c flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5256 [inline]
 __schedule+0x14b8/0x4f90 kernel/sched/core.c:6863
 __schedule_loop kernel/sched/core.c:6945 [inline]
 schedule+0x161/0x360 kernel/sched/core.c:6960
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:7017
 rwsem_down_write_slowpath+0x916/0x1090 kernel/locking/rwsem.c:1185
 __down_write_common kernel/locking/rwsem.c:1317 [inline]
 __down_write kernel/locking/rwsem.c:1326 [inline]
 down_write+0x1a7/0x1f0 kernel/locking/rwsem.c:1591
 mmap_write_lock include/linux/mmap_lock.h:335 [inline]
 exit_mmap+0x277/0xae0 mm/mmap.c:1285
 __mmput+0x118/0x430 kernel/fork.c:1173
 exit_mm+0x1d6/0x2b0 kernel/exit.c:581
 do_exit+0x654/0x2300 kernel/exit.c:959
 do_group_exit+0x218/0x2d0 kernel/exit.c:1112
 __do_sys_exit_group kernel/exit.c:1123 [inline]
 __se_sys_exit_group kernel/exit.c:1121 [inline]
 __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:1121
 x64_sys_call+0x220c/0x2210 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x86/0x1340 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f4400f8f749
RSP: 002b:00007ffe2a7a66f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f4400f8f749
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffe2a7a675c R08: 000000052a7a67ef R09: 00000000000927c0
R10: 0000000000000001 R11: 0000000000000246 R12: 000000000000000e
R13: 00000000000927c0 R14: 0000000000026062 R15: 00007ffe2a7a67b0
 </TASK>
INFO: task syz.0.36:6555 is blocked on an rw-semaphore, but the owner is not found.
INFO: task syz.1.37:6558 blocked for more than 145 seconds.
      Not tainted syzkaller #0
      Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.37        state:D stack:27112 pid:6558  tgid:6558  ppid:6339   task_flags:0x40004c flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5256 [inline]
 __schedule+0x14b8/0x4f90 kernel/sched/core.c:6863
 __schedule_loop kernel/sched/core.c:6945 [inline]
 schedule+0x161/0x360 kernel/sched/core.c:6960
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:7017
 rwsem_down_write_slowpath+0x916/0x1090 kernel/locking/rwsem.c:1185
 __down_write_common kernel/locking/rwsem.c:1317 [inline]
 __down_write kernel/locking/rwsem.c:1326 [inline]
 down_write+0x1a7/0x1f0 kernel/locking/rwsem.c:1591
 mmap_write_lock include/linux/mmap_lock.h:335 [inline]
 exit_mmap+0x277/0xae0 mm/mmap.c:1285
 __mmput+0x118/0x430 kernel/fork.c:1173
 exit_mm+0x1d6/0x2b0 kernel/exit.c:581
 do_exit+0x654/0x2300 kernel/exit.c:959
 do_group_exit+0x218/0x2d0 kernel/exit.c:1112
 __do_sys_exit_group kernel/exit.c:1123 [inline]
 __se_sys_exit_group kernel/exit.c:1121 [inline]
 __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:1121
 x64_sys_call+0x220c/0x2210 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x86/0x1340 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f797678f749
RSP: 002b:00007ffe9dc69ef8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f797678f749
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffe9dc69f5c R08: 000000059dc69fef R09: 00000000000927c0
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000002
R13: 00000000000927c0 R14: 0000000000026098 R15: 00007ffe9dc69fb0
 </TASK>
INFO: task syz.1.37:6558 is blocked on an rw-semaphore, but the owner is not found.
INFO: task syz.2.19:6559 blocked for more than 145 seconds.
      Not tainted syzkaller #0
      Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.19        state:D stack:26184 pid:6559  tgid:6559  ppid:6342   task_flags:0x40004c flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5256 [inline]
 __schedule+0x14b8/0x4f90 kernel/sched/core.c:6863
 __schedule_loop kernel/sched/core.c:6945 [inline]
 schedule+0x161/0x360 kernel/sched/core.c:6960
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:7017
 rwsem_down_write_slowpath+0x916/0x1090 kernel/locking/rwsem.c:1185
 __down_write_common kernel/locking/rwsem.c:1317 [inline]
 __down_write kernel/locking/rwsem.c:1326 [inline]
 down_write+0x1a7/0x1f0 kernel/locking/rwsem.c:1591
 mmap_write_lock include/linux/mmap_lock.h:335 [inline]
 exit_mmap+0x277/0xae0 mm/mmap.c:1285
 __mmput+0x118/0x430 kernel/fork.c:1173
 exit_mm+0x1d6/0x2b0 kernel/exit.c:581
 do_exit+0x654/0x2300 kernel/exit.c:959
 do_group_exit+0x218/0x2d0 kernel/exit.c:1112
 __do_sys_exit_group kernel/exit.c:1123 [inline]
 __se_sys_exit_group kernel/exit.c:1121 [inline]
 __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:1121
 x64_sys_call+0x220c/0x2210 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x86/0x1340 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7ff2f658f749
RSP: 002b:00007ffc2f2c7868 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ff2f658f749
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000003 R08: 000000052f2c795f R09: 00007ff2f67b4280
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff2f67b4280 R14: 0000000000000003 R15: 00007ffc2f2c7920
 </TASK>
INFO: task syz.2.19:6559 is blocked on an rw-semaphore, but the owner is not found.

Showing all locks held in the system:
1 lock held by khungtaskd/31:
 #0: ffffffff8dd3ee00 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 #0: ffffffff8dd3ee00 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:867 [inline]
 #0: ffffffff8dd3ee00 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2a/0x180 kernel/locking/lockdep.c:6775
1 lock held by klogd/5163:
 #0: ffff8880b893a8d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:639
2 locks held by udevd/5174:
 #0: ffffffff8ddfb490 (dup_mmap_sem){.+.+}-{0:0}, at: dup_mm kernel/fork.c:1528 [inline]
 #0: ffffffff8ddfb490 (dup_mmap_sem){.+.+}-{0:0}, at: copy_mm+0x131/0x4b0 kernel/fork.c:1581
 #1: ffff88807d384cc0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:353 [inline]
 #1: ffff88807d384cc0 (&mm->mmap_lock){++++}-{4:4}, at: dup_mmap+0x121/0x1b50 mm/mmap.c:1726
2 locks held by getty/5560:
 #0: ffff88814d3f50a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc9000332b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x445/0x1450 drivers/tty/n_tty.c:2211
1 lock held by syz-executor/6226:
 #0: ffff888028e30340 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:353 [inline]
 #0: ffff888028e30340 (&mm->mmap_lock){++++}-{4:4}, at: vm_mmap_pgoff+0x20d/0x4c0 mm/util.c:579
1 lock held by syz-executor/6335:
 #0: ffff888032714cc0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:335 [inline]
 #0: ffff888032714cc0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x277/0xae0 mm/mmap.c:1285
1 lock held by syz-executor/6339:
 #0: ffff888026f0f180 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:335 [inline]
 #0: ffff888026f0f180 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x277/0xae0 mm/mmap.c:1285
1 lock held by syz-executor/6342:
 #0: ffff888026f08340 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:335 [inline]
 #0: ffff888026f08340 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x277/0xae0 mm/mmap.c:1285
1 lock held by syz-executor/6343:
 #0: ffff888026f08f80 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:335 [inline]
 #0: ffff888026f08f80 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x277/0xae0 mm/mmap.c:1285
1 lock held by syz-executor/6344:
 #0: ffff888032711bc0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:335 [inline]
 #0: ffff888032711bc0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x277/0xae0 mm/mmap.c:1285
1 lock held by syz.0.36/6555:
 #0: ffff88807d385900 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:335 [inline]
 #0: ffff88807d385900 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x277/0xae0 mm/mmap.c:1285
1 lock held by syz.1.37/6558:
 #0: ffff88807d384080 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:335 [inline]
 #0: ffff88807d384080 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x277/0xae0 mm/mmap.c:1285
1 lock held by syz.2.19/6559:
 #0: ffff88802f1f4080 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:335 [inline]
 #0: ffff88802f1f4080 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x277/0xae0 mm/mmap.c:1285
2 locks held by dhcpcd-run-hook/6562:
 #0: ffffffff8ddfb490 (dup_mmap_sem){.+.+}-{0:0}, at: dup_mm kernel/fork.c:1528 [inline]
 #0: ffffffff8ddfb490 (dup_mmap_sem){.+.+}-{0:0}, at: copy_mm+0x131/0x4b0 kernel/fork.c:1581
 #1: ffff88802f1f1bc0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:353 [inline]
 #1: ffff88802f1f1bc0 (&mm->mmap_lock){++++}-{4:4}, at: dup_mmap+0x121/0x1b50 mm/mmap.c:1726
1 lock held by syz-executor/6566:
 #0: ffff888032714080 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:335 [inline]
 #0: ffff888032714080 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x277/0xae0 mm/mmap.c:1285
2 locks held by syz-executor/6576:
 #0: ffffffff8ddfb490 (dup_mmap_sem){.+.+}-{0:0}, at: dup_mm kernel/fork.c:1528 [inline]
 #0: ffffffff8ddfb490 (dup_mmap_sem){.+.+}-{0:0}, at: copy_mm+0x131/0x4b0 kernel/fork.c:1581
 #1: ffff88807dcf4cc0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:353 [inline]
 #1: ffff88807dcf4cc0 (&mm->mmap_lock){++++}-{4:4}, at: dup_mmap+0x121/0x1b50 mm/mmap.c:1726
2 locks held by syz-executor/6579:
 #0: ffffffff8ddfb490 (dup_mmap_sem){.+.+}-{0:0}, at: dup_mm kernel/fork.c:1528 [inline]
 #0: ffffffff8ddfb490 (dup_mmap_sem){.+.+}-{0:0}, at: copy_mm+0x131/0x4b0 kernel/fork.c:1581
 #1: ffff888028494cc0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:353 [inline]
 #1: ffff888028494cc0 (&mm->mmap_lock){++++}-{4:4}, at: dup_mmap+0x121/0x1b50 mm/mmap.c:1726
1 lock held by udevd/6612:
 #0: ffff88807dcf0f80 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:353 [inline]
 #0: ffff88807dcf0f80 (&mm->mmap_lock){++++}-{4:4}, at: __vm_munmap+0x132/0x370 mm/vma.c:3200
1 lock held by syz.6.39/6714:
 #0: ffff88807d9f1bc0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:335 [inline]
 #0: ffff88807d9f1bc0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x277/0xae0 mm/mmap.c:1285
1 lock held by syz.7.49/6719:
 #0: ffff888078a30f80 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:335 [inline]
 #0: ffff888078a30f80 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x277/0xae0 mm/mmap.c:1285

=============================================

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x185/0x250 lib/dump_stack.c:120
 nmi_cpu_backtrace+0x39a/0x3d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x176/0x2e0 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
 __sys_info lib/sys_info.c:157 [inline]
 sys_info+0x131/0x170 lib/sys_info.c:165
 check_hung_uninterruptible_tasks kernel/hung_task.c:346 [inline]
 watchdog+0x17e1/0x1830 kernel/hung_task.c:515
 kthread+0x70d/0x890 kernel/kthread.c:463
 ret_from_fork+0x591/0xaf0 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:pv_native_safe_halt+0xb/0x20 arch/x86/kernel/paravirt.c:82
Code: 5d 50 02 e9 17 ea 02 00 cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 90 0f 00 2d 97 86 21 00 fb f4 <c3> cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 90
RSP: 0018:ffffc90000197de0 EFLAGS: 000002c6
RAX: 795337415c461500 RBX: ffffffff819690e6 RCX: 795337415c461500
RDX: 0000000000000001 RSI: ffffffff8d5518aa RDI: ffffffff8ba0d260
RBP: ffffc90000197f10 R08: ffff8880b89336db R09: 1ffff110171266db
R10: dffffc0000000000 R11: ffffed10171266dc R12: ffffffff8f5ab4b0
R13: 1ffff110038dbb58 R14: 0000000000000001 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff88812648d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f30ff2df000 CR3: 000000000db38000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline]
 default_idle+0xf/0x20 arch/x86/kernel/process.c:767
 default_idle_call+0x6d/0xb0 kernel/sched/idle.c:122
 cpuidle_idle_call kernel/sched/idle.c:191 [inline]
 do_idle+0x1e6/0x510 kernel/sched/idle.c:332
 cpu_startup_entry+0x40/0x60 kernel/sched/idle.c:430
 start_secondary+0x101/0x110 arch/x86/kernel/smpboot.c:312
 common_startup_64+0x13e/0x147
 </TASK>