syzbot


INFO: task hung in uprobe_start_dup_mmap (2)

Status: closed as invalid on 2022/02/08 09:50
Reported-by: syzbot+@syzkaller.appspotmail.com
First crash: 342d, last: 327d
similar bugs (4):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: task hung in uprobe_start_dup_mmap 196 1337d 1551d 0/24 auto-closed as invalid on 2019/10/05 21:52
linux-4.19 INFO: task hung in uprobe_start_dup_mmap (2) 2 336d 351d 0/1 auto-closed as invalid on 2022/05/04 01:46
linux-4.19 INFO: task hung in uprobe_start_dup_mmap (3) 1 59d 59d 0/1 upstream: reported on 2022/10/08 00:29
linux-4.19 INFO: task hung in uprobe_start_dup_mmap 1 1263d 1263d 0/1 auto-closed as invalid on 2019/10/25 08:44

Sample crash report:
INFO: task syz-executor.2:3637 blocked for more than 143 seconds.
      Not tainted 5.16.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2  state:D stack:20208 pid: 3637 ppid:     1 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:4986 [inline]
 __schedule+0x971/0x10e0 kernel/sched/core.c:6296
 schedule+0x12b/0x1f0 kernel/sched/core.c:6369
 percpu_rwsem_wait+0x3c2/0x580 kernel/locking/percpu-rwsem.c:160
 __percpu_down_read+0xcf/0x100 kernel/locking/percpu-rwsem.c:174
 percpu_down_read include/linux/percpu-rwsem.h:65 [inline]
 uprobe_start_dup_mmap+0x117/0x130 kernel/events/uprobes.c:1564
 dup_mmap+0xc7/0xfd0 kernel/fork.c:497
 dup_mm+0x8c/0x310 kernel/fork.c:1450
 copy_mm kernel/fork.c:1502 [inline]
 copy_process+0x28d7/0x5ca0 kernel/fork.c:2191
 kernel_clone+0x22a/0x7e0 kernel/fork.c:2582
 __do_sys_clone kernel/fork.c:2699 [inline]
 __se_sys_clone kernel/fork.c:2683 [inline]
 __x64_sys_clone+0x245/0x2b0 kernel/fork.c:2683
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fa23ae1d4ab
RSP: 002b:00007ffc274fac40 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fa23ae1d4ab
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000555556d54400
R10: 0000555556d546d0 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffc274fad20
 </TASK>
INFO: task syz-executor.4:3639 blocked for more than 143 seconds.
      Not tainted 5.16.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4  state:D stack:20240 pid: 3639 ppid:     1 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:4986 [inline]
 __schedule+0x971/0x10e0 kernel/sched/core.c:6296
 schedule+0x12b/0x1f0 kernel/sched/core.c:6369
 percpu_rwsem_wait+0x3c2/0x580 kernel/locking/percpu-rwsem.c:160
 __percpu_down_read+0xcf/0x100 kernel/locking/percpu-rwsem.c:174
 percpu_down_read include/linux/percpu-rwsem.h:65 [inline]
 uprobe_start_dup_mmap+0x117/0x130 kernel/events/uprobes.c:1564
 dup_mmap+0xc7/0xfd0 kernel/fork.c:497
 dup_mm+0x8c/0x310 kernel/fork.c:1450
 copy_mm kernel/fork.c:1502 [inline]
 copy_process+0x28d7/0x5ca0 kernel/fork.c:2191
 kernel_clone+0x22a/0x7e0 kernel/fork.c:2582
 __do_sys_clone kernel/fork.c:2699 [inline]
 __se_sys_clone kernel/fork.c:2683 [inline]
 __x64_sys_clone+0x245/0x2b0 kernel/fork.c:2683
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f048dd014ab
RSP: 002b:00007fff841ceeb0 EFLAGS: 00000246
 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f048dd014ab
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 00005555568be400
R10: 00005555568be6d0 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 00007fff841cef90
 </TASK>
INFO: task syz-executor.5:3640 blocked for more than 144 seconds.
      Not tainted 5.16.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5  state:D stack:19824 pid: 3640 ppid:     1 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:4986 [inline]
 __schedule+0x971/0x10e0 kernel/sched/core.c:6296
 schedule+0x12b/0x1f0 kernel/sched/core.c:6369
 percpu_rwsem_wait+0x3c2/0x580 kernel/locking/percpu-rwsem.c:160
 __percpu_down_read+0xcf/0x100 kernel/locking/percpu-rwsem.c:174
 percpu_down_read include/linux/percpu-rwsem.h:65 [inline]
 uprobe_start_dup_mmap+0x117/0x130 kernel/events/uprobes.c:1564
 dup_mmap+0xc7/0xfd0 kernel/fork.c:497
 dup_mm+0x8c/0x310 kernel/fork.c:1450
 copy_mm kernel/fork.c:1502 [inline]
 copy_process+0x28d7/0x5ca0 kernel/fork.c:2191
 kernel_clone+0x22a/0x7e0 kernel/fork.c:2582
 __do_sys_clone kernel/fork.c:2699 [inline]
 __se_sys_clone kernel/fork.c:2683 [inline]
 __x64_sys_clone+0x245/0x2b0 kernel/fork.c:2683
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f377dcd24ab
RSP: 002b:00007ffd3b122800 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f377dcd24ab
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 000055555719a400
R10: 000055555719a6d0 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffd3b1228e0
 </TASK>
INFO: task syz-executor.3:13424 blocked for more than 144 seconds.
      Not tainted 5.16.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3  state:D stack:24272 pid:13424 ppid: 13361 flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:4986 [inline]
 __schedule+0x971/0x10e0 kernel/sched/core.c:6296
 schedule+0x12b/0x1f0 kernel/sched/core.c:6369
 percpu_rwsem_wait+0x3c2/0x580 kernel/locking/percpu-rwsem.c:160
 __percpu_down_read+0xcf/0x100 kernel/locking/percpu-rwsem.c:174
 percpu_down_read include/linux/percpu-rwsem.h:65 [inline]
 uprobe_start_dup_mmap+0x117/0x130 kernel/events/uprobes.c:1564
 dup_mmap+0xc7/0xfd0 kernel/fork.c:497
 dup_mm+0x8c/0x310 kernel/fork.c:1450
 copy_mm kernel/fork.c:1502 [inline]
 copy_process+0x28d7/0x5ca0 kernel/fork.c:2191
 kernel_clone+0x22a/0x7e0 kernel/fork.c:2582
 __do_sys_fork+0xac/0x110 kernel/fork.c:2645
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f7962178eb9
RSP: 002b:00007f7960a49168 EFLAGS: 00000246 ORIG_RAX: 0000000000000039
RAX: ffffffffffffffda RBX: 00007f796228c370 RCX: 00007f7962178eb9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f79621d308d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd44a00e0f R14: 00007f7960a49300 R15: 0000000000022000
 </TASK>
INFO: task syz-executor.3:13489 blocked for more than 145 seconds.
      Not tainted 5.16.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3  state:D stack:24272 pid:13489 ppid: 13434 flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:4986 [inline]
 __schedule+0x971/0x10e0 kernel/sched/core.c:6296
 schedule+0x12b/0x1f0 kernel/sched/core.c:6369
 percpu_rwsem_wait+0x3c2/0x580 kernel/locking/percpu-rwsem.c:160
 __percpu_down_read+0xcf/0x100 kernel/locking/percpu-rwsem.c:174
 percpu_down_read include/linux/percpu-rwsem.h:65 [inline]
 uprobe_start_dup_mmap+0x117/0x130 kernel/events/uprobes.c:1564
 dup_mmap+0xc7/0xfd0 kernel/fork.c:497
 dup_mm+0x8c/0x310 kernel/fork.c:1450
 copy_mm kernel/fork.c:1502 [inline]
 copy_process+0x28d7/0x5ca0 kernel/fork.c:2191
 kernel_clone+0x22a/0x7e0 kernel/fork.c:2582
 __do_sys_fork+0xac/0x110 kernel/fork.c:2645
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f7962178eb9
RSP: 002b:00007f7960a49168 EFLAGS: 00000246 ORIG_RAX: 0000000000000039
RAX: ffffffffffffffda RBX: 00007f796228c370 RCX: 00007f7962178eb9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f79621d308d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd44a00e0f R14: 00007f7960a49300 R15: 0000000000022000
 </TASK>
INFO: task syz-executor.3:13746 blocked for more than 146 seconds.
      Not tainted 5.16.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3  state:D stack:24272 pid:13746 ppid: 13514 flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:4986 [inline]
 __schedule+0x971/0x10e0 kernel/sched/core.c:6296
 schedule+0x12b/0x1f0 kernel/sched/core.c:6369
 percpu_rwsem_wait+0x3c2/0x580 kernel/locking/percpu-rwsem.c:160
 __percpu_down_read+0xcf/0x100 kernel/locking/percpu-rwsem.c:174
 percpu_down_read include/linux/percpu-rwsem.h:65 [inline]
 uprobe_start_dup_mmap+0x117/0x130 kernel/events/uprobes.c:1564
 dup_mmap+0xc7/0xfd0 kernel/fork.c:497
 dup_mm+0x8c/0x310 kernel/fork.c:1450
 copy_mm kernel/fork.c:1502 [inline]
 copy_process+0x28d7/0x5ca0 kernel/fork.c:2191
 kernel_clone+0x22a/0x7e0 kernel/fork.c:2582
 __do_sys_fork+0xac/0x110 kernel/fork.c:2645
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f7962178eb9
RSP: 002b:00007f7960a49168 EFLAGS: 00000246 ORIG_RAX: 0000000000000039
RAX: ffffffffffffffda RBX: 00007f796228c370 RCX: 00007f7962178eb9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f79621d308d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd44a00e0f R14: 00007f7960a49300 R15: 0000000000022000
 </TASK>
INFO: task syz-executor.3:13756 blocked for more than 146 seconds.
      Not tainted 5.16.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3  state:D stack:24272 pid:13756 ppid: 13548 flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:4986 [inline]
 __schedule+0x971/0x10e0 kernel/sched/core.c:6296
 schedule+0x12b/0x1f0 kernel/sched/core.c:6369
 percpu_rwsem_wait+0x3c2/0x580 kernel/locking/percpu-rwsem.c:160
 __percpu_down_read+0xcf/0x100 kernel/locking/percpu-rwsem.c:174
 percpu_down_read include/linux/percpu-rwsem.h:65 [inline]
 uprobe_start_dup_mmap+0x117/0x130 kernel/events/uprobes.c:1564
 dup_mmap+0xc7/0xfd0 kernel/fork.c:497
 dup_mm+0x8c/0x310 kernel/fork.c:1450
 copy_mm kernel/fork.c:1502 [inline]
 copy_process+0x28d7/0x5ca0 kernel/fork.c:2191
 kernel_clone+0x22a/0x7e0 kernel/fork.c:2582
 __do_sys_fork+0xac/0x110 kernel/fork.c:2645
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f7962178eb9
RSP: 002b:00007f7960a49168 EFLAGS: 00000246 ORIG_RAX: 0000000000000039
RAX: ffffffffffffffda RBX: 00007f796228c370 RCX: 00007f7962178eb9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f79621d308d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd44a00e0f R14: 00007f7960a49300 R15: 0000000000022000
 </TASK>
INFO: task syz-executor.3:13925 blocked for more than 147 seconds.
      Not tainted 5.16.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3  state:D stack:24272 pid:13925 ppid: 13442 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:4986 [inline]
 __schedule+0x971/0x10e0 kernel/sched/core.c:6296
 schedule+0x12b/0x1f0 kernel/sched/core.c:6369
 percpu_rwsem_wait+0x3c2/0x580 kernel/locking/percpu-rwsem.c:160
 __percpu_down_read+0xcf/0x100 kernel/locking/percpu-rwsem.c:174
 percpu_down_read include/linux/percpu-rwsem.h:65 [inline]
 uprobe_start_dup_mmap+0x117/0x130 kernel/events/uprobes.c:1564
 dup_mmap+0xc7/0xfd0 kernel/fork.c:497
 dup_mm+0x8c/0x310 kernel/fork.c:1450
 copy_mm kernel/fork.c:1502 [inline]
 copy_process+0x28d7/0x5ca0 kernel/fork.c:2191
 kernel_clone+0x22a/0x7e0 kernel/fork.c:2582
 __do_sys_fork+0xac/0x110 kernel/fork.c:2645
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f7962178eb9
RSP: 002b:00007f7960a49168 EFLAGS: 00000246 ORIG_RAX: 0000000000000039
RAX: ffffffffffffffda RBX: 00007f796228c370 RCX: 00007f7962178eb9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f79621d308d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd44a00e0f R14: 00007f7960a49300 R15: 0000000000022000
 </TASK>
INFO: task syz-executor.3:14565 blocked for more than 148 seconds.
      Not tainted 5.16.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3  state:D
 stack:25424 pid:14565 ppid: 13925 flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:4986 [inline]
 __schedule+0x971/0x10e0 kernel/sched/core.c:6296
 schedule+0x12b/0x1f0 kernel/sched/core.c:6369
 percpu_rwsem_wait+0x3c2/0x580 kernel/locking/percpu-rwsem.c:160
 __percpu_down_read+0xcf/0x100 kernel/locking/percpu-rwsem.c:174
 percpu_down_read include/linux/percpu-rwsem.h:65 [inline]
 uprobe_start_dup_mmap+0x117/0x130 kernel/events/uprobes.c:1564
 dup_mmap+0xc7/0xfd0 kernel/fork.c:497
 dup_mm+0x8c/0x310 kernel/fork.c:1450
 copy_mm kernel/fork.c:1502 [inline]
 copy_process+0x28d7/0x5ca0 kernel/fork.c:2191
 kernel_clone+0x22a/0x7e0 kernel/fork.c:2582
 __do_sys_fork+0xac/0x110 kernel/fork.c:2645
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f7962178eb9
RSP: 002b:00007f7960a49168 EFLAGS: 00000246 ORIG_RAX: 0000000000000039
RAX: ffffffffffffffda RBX: 00007f796228c370 RCX: 00007f7962178eb9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f79621d308d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd44a00e0f R14: 00007f7960a49300 R15: 0000000000022000
 </TASK>
INFO: task syz-executor.1:14569 blocked for more than 149 seconds.
      Not tainted 5.16.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1  state:D stack:25712 pid:14569 ppid:  3605 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:4986 [inline]
 __schedule+0x971/0x10e0 kernel/sched/core.c:6296
 schedule+0x12b/0x1f0 kernel/sched/core.c:6369
 percpu_rwsem_wait+0x3c2/0x580 kernel/locking/percpu-rwsem.c:160
 __percpu_down_read+0xcf/0x100 kernel/locking/percpu-rwsem.c:174
 percpu_down_read include/linux/percpu-rwsem.h:65 [inline]
 uprobe_start_dup_mmap+0x117/0x130 kernel/events/uprobes.c:1564
 dup_mmap+0xc7/0xfd0 kernel/fork.c:497
 dup_mm+0x8c/0x310 kernel/fork.c:1450
 copy_mm kernel/fork.c:1502 [inline]
 copy_process+0x28d7/0x5ca0 kernel/fork.c:2191
 kernel_clone+0x22a/0x7e0 kernel/fork.c:2582
 __do_sys_clone kernel/fork.c:2699 [inline]
 __se_sys_clone kernel/fork.c:2683 [inline]
 __x64_sys_clone+0x245/0x2b0 kernel/fork.c:2683
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fce2f8bf4ab
RSP: 002b:00007ffe06c52b30 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffe06c53188 RCX: 00007fce2f8bf4ab
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000555556d1b400
R10: 0000555556d1b6d0 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe06c52c20 R14: 00007fce2f9d44d8 R15: 0000000000000006
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/26:
 #0: ffffffff8cb1e340 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
4 locks held by oom_reaper/27:
1 lock held by udevd/2974:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
1 lock held by dhcpcd/3185:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
2 locks held by getty/3285:
 #0: ffff888022564098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
 #1: ffffc90002b962e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6c5/0x1c60 drivers/tty/n_tty.c:2113
1 lock held by syz-executor.2/3637:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
1 lock held by syz-executor.3/3638:
 #0: 
ffffffff8cbad490 (dup_mmap_sem
){++++}-{0:0}
, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
1 lock held by syz-executor.4/3639:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
1 lock held by syz-executor.5/3640:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
1 lock held by syz-executor.0/9701:
 #0: ffffffff8cb6d568 (event_mutex){+.+.}-{3:3}, at: perf_trace_destroy+0x27/0xb0 kernel/trace/trace_event_perf.c:241
1 lock held by syz-executor.0/9725:
 #0: ffffffff8cb6d568 (event_mutex){+.+.}-{3:3}, at: perf_trace_destroy+0x27/0xb0 kernel/trace/trace_event_perf.c:241
1 lock held by syz-executor.3/13360:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
3 locks held by syz-executor.3/13361:
3 locks held by syz-executor.3/13363:
3 locks held by syz-executor.3/13364:
3 locks held by syz-executor.3/13371:
1 lock held by syz-executor.3/13374:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
1 lock held by syz-executor.3/13376:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
3 locks held by syz-executor.3/13378:
1 lock held by syz-executor.3/13384:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
3 locks held by syz-executor.3/13394:
3 locks held by syz-executor.3/13395:
3 locks held by syz-executor.3/13396:
1 lock held by syz-executor.3/13398:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
3 locks held by syz-executor.3/13399:
3 locks held by syz-executor.3/13400:
3 locks held by syz-executor.3/13402:
1 lock held by syz-executor.3/13403:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
1 lock held by syz-executor.3/13404:
4 locks held by syz-executor.3/13405:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
 #1: ffff88807dcf6a28 (&mm->mmap_lock#2){++++}-{3:3}, at: mmap_write_lock_killable include/linux/mmap_lock.h:87 [inline]
 #1: ffff88807dcf6a28 (&mm->mmap_lock#2){++++}-{3:3}, at: dup_mmap+0xde/0xfd0 kernel/fork.c:498
 #2: ffff888095e14e28 (&mm->mmap_lock/1){+.+.}-{3:3}, at: mmap_write_lock_nested include/linux/mmap_lock.h:78 [inline]
 #2: ffff888095e14e28 (&mm->mmap_lock/1){+.+.}-{3:3}, at: dup_mmap+0x128/0xfd0 kernel/fork.c:507
 #3: ffffffff8cbb4708 (oom_lock){+.+.}-{3:3}, at: mem_cgroup_out_of_memory+0xf1/0x3b0 mm/memcontrol.c:1600
3 locks held by syz-executor.3/13413:
1 lock held by syz-executor.3/13414:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
1 lock held by syz-executor.3/13415:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
1 lock held by syz-executor.3/13417:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
3 locks held by syz-executor.3/13418:
1 lock held by syz-executor.3/13419:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
1 lock held by syz-executor.3/13420:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
1 lock held by syz-executor.3/13421:
1 lock held by syz-executor.3/13422:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
1 lock held by syz-executor.3/13423:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
1 lock held by syz-executor.3/13424:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
3 locks held by syz-executor.3/13425:
3 locks held by syz-executor.3/13426:
3 locks held by syz-executor.3/13427:
3 locks held by syz-executor.3/13428:
3 locks held by syz-executor.3/13429:
3 locks held by syz-executor.3/13430:
3 locks held by syz-executor.3/13431:
3 locks held by syz-executor.3/13432:
1 lock held by syz-executor.3/13433:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
3 locks held by syz-executor.3/13434:
1 lock held by syz-executor.3/13437:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
3 locks held by syz-executor.3/13438:
3 locks held by syz-executor.3/13439:
1 lock held by syz-executor.3/13440:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
3 locks held by syz-executor.3/13441:
3 locks held by syz-executor.3/13442:
1 lock held by syz-executor.3/13444:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
3 locks held by syz-executor.3/13445:
3 locks held by syz-executor.3/13446:
1 lock held by syz-executor.3/13447:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
3 locks held by syz-executor.3/13449:
3 locks held by syz-executor.3/13450:
3 locks held by syz-executor.3/13451:
1 lock held by syz-executor.3/13453:
1 lock held by syz-executor.3/13454:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
1 lock held by syz-executor.3/13456:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
4 locks held by syz-executor.3/13457:
1 lock held by syz-executor.3/13458:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
1 lock held by syz-executor.3/13459:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
1 lock held by syz-executor.3/13460:
3 locks held by syz-executor.3/13461:
3 locks held by syz-executor.3/13462:
3 locks held by syz-executor.3/13463:
3 locks held by syz-executor.3/13464:
3 locks held by syz-executor.3/13465:
3 locks held by syz-executor.3/13466:
3 locks held by syz-executor.3/13467:
1 lock held by syz-executor.3/13468:
3 locks held by syz-executor.3/13469:
3 locks held by syz-executor.3/13470:
3 locks held by syz-executor.3/13471:
3 locks held by syz-executor.3/13472:
3 locks held by syz-executor.3/13473:
3 locks held by syz-executor.3/13474:
3 locks held by syz-executor.3/13475:
1 lock held by syz-executor.3/13476:
3 locks held by syz-executor.3/13477:
1 lock held by syz-executor.3/13478:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
1 lock held by syz-executor.3/13479:
1 lock held by syz-executor.3/13480:
1 lock held by syz-executor.3/13482:
3 locks held by syz-executor.3/13483:
1 lock held by syz-executor.3/13484:
3 locks held by syz-executor.3/13485:
3 locks held by syz-executor.3/13487:
3 locks held by syz-executor.3/13488:
1 lock held by syz-executor.3/13489:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
3 locks held by syz-executor.3/13490:
3 locks held by syz-executor.3/13492:
3 locks held by syz-executor.3/13493:
3 locks held by syz-executor.3/13495:
3 locks held by syz-executor.3/13496:
3 locks held by syz-executor.3/13497:
3 locks held by syz-executor.3/13498:
3 locks held by syz-executor.3/13499:
3 locks held by syz-executor.3/13500:
3 locks held by syz-executor.3/13502:
3 locks held by syz-executor.3/13503:
3 locks held by syz-executor.3/13504:
1 lock held by syz-executor.3/13505:
3 locks held by syz-executor.3/13506:
3 locks held by syz-executor.3/13508:
1 lock held by syz-executor.3/13509:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
3 locks held by syz-executor.3/13510:
1 lock held by syz-executor.3/13512:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
3 locks held by syz-executor.3/13513:
1 lock held by syz-executor.3/13514:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
3 locks held by syz-executor.3/13515:
3 locks held by syz-executor.3/13516:
1 lock held by syz-executor.3/13517:
1 lock held by syz-executor.3/13518:
1 lock held by syz-executor.3/13519:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
1 lock held by syz-executor.3/13520:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
3 locks held by syz-executor.3/13522:
3 locks held by syz-executor.3/13523:
1 lock held by syz-executor.3/13525:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
3 locks held by syz-executor.3/13526:
1 lock held by syz-executor.3/13527:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
1 lock held by syz-executor.3/13528:
4 locks held by syz-executor.3/13529:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
 #1: ffff888079425528 (&mm->mmap_lock#2){++++}-{3:3}, at: mmap_write_lock_killable include/linux/mmap_lock.h:87 [inline]
 #1: ffff888079425528 (&mm->mmap_lock#2){++++}-{3:3}, at: dup_mmap+0xde/0xfd0 kernel/fork.c:498
 #2: ffff88808a0ddc28 (&mm->mmap_lock/1){+.+.}-{3:3}, at: mmap_write_lock_nested include/linux/mmap_lock.h:78 [inline]
 #2: ffff88808a0ddc28 (&mm->mmap_lock/1){+.+.}-{3:3}, at: dup_mmap+0x128/0xfd0 kernel/fork.c:507
 #3: ffffffff8cbb4708 (oom_lock){+.+.}-{3:3}, at: mem_cgroup_out_of_memory+0xf1/0x3b0 mm/memcontrol.c:1600
1 lock held by syz-executor.3/13532:
3 locks held by syz-executor.3/13533:
3 locks held by syz-executor.3/13534:
3 locks held by syz-executor.3/13535:
3 locks held by syz-executor.3/13537:
3 locks held by syz-executor.3/13539:
3 locks held by syz-executor.3/13541:
1 lock held by syz-executor.3/13544:
3 locks held by syz-executor.3/13546:
1 lock held by syz-executor.3/13548:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
3 locks held by syz-executor.3/13549:
3 locks held by syz-executor.3/13552:
3 locks held by syz-executor.3/13553:
3 locks held by syz-executor.3/13554:
3 locks held by syz-executor.3/13555:
3 locks held by syz-executor.3/13556:
3 locks held by syz-executor.3/13557:
3 locks held by syz-executor.3/13558:
1 lock held by syz-executor.3/13560:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
1 lock held by syz-executor.3/13561:
1 lock held by syz-executor.3/13562:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
3 locks held by syz-executor.3/13563:
3 locks held by syz-executor.3/13565:
1 lock held by syz-executor.3/13566:
3 locks held by syz-executor.3/13567:
1 lock held by syz-executor.3/13568:
3 locks held by syz-executor.3/13570:
1 lock held by syz-executor.3/13571:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
3 locks held by syz-executor.3/13572:
3 locks held by syz-executor.3/13575:
3 locks held by syz-executor.3/13577:
3 locks held by syz-executor.3/13578:
3 locks held by syz-executor.3/13579:
3 locks held by syz-executor.3/13580:
1 lock held by syz-executor.3/13582:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
3 locks held by syz-executor.3/13584:
3 locks held by syz-executor.3/13585:
3 locks held by syz-executor.3/13586:
5 locks held by syz-executor.3/13587:
3 locks held by syz-executor.3/13588:
3 locks held by syz-executor.3/13590:
4 locks held by syz-executor.3/13591:
3 locks held by syz-executor.3/13593:
1 lock held by syz-executor.3/13594:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
1 lock held by syz-executor.3/13595:
3 locks held by syz-executor.3/13596:
3 locks held by syz-executor.3/13598:
3 locks held by syz-executor.3/13599:
1 lock held by syz-executor.3/13600:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
3 locks held by syz-executor.3/13601:
1 lock held by syz-executor.3/13602:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
1 lock held by syz-executor.3/13604:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
3 locks held by syz-executor.3/13605:
1 lock held by syz-executor.3/13607:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
3 locks held by syz-executor.3/13608:
1 lock held by syz-executor.3/13609:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
3 locks held by syz-executor.3/13610:
3 locks held by syz-executor.3/13612:
1 lock held by syz-executor.3/13614:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
3 locks held by syz-executor.3/13616:
3 locks held by syz-executor.3/13618:
3 locks held by syz-executor.3/13619:
3 locks held by syz-executor.3/13620:
3 locks held by syz-executor.3/13622:
1 lock held by syz-executor.3/13623:
1 lock held by syz-executor.3/13624:
3 locks held by syz-executor.3/13626:
1 lock held by syz-executor.3/13627:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
3 locks held by syz-executor.3/13631:
3 locks held by syz-executor.3/13632:
3 locks held by syz-executor.3/13633:
3 locks held by syz-executor.3/13634:
3 locks held by syz-executor.3/13635:
3 locks held by syz-executor.3/13636:
3 locks held by syz-executor.3/13637:
3 locks held by syz-executor.3/13638:
3 locks held by syz-executor.3/13639:
1 lock held by syz-executor.3/13640:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
3 locks held by syz-executor.3/13641:
3 locks held by syz-executor.3/13642:
1 lock held by syz-executor.3/13644:
1 lock held by syz-executor.3/13645:
3 locks held by syz-executor.3/13646:
3 locks held by syz-executor.3/13647:
3 locks held by syz-executor.3/13648:
1 lock held by syz-executor.3/13649:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
3 locks held by syz-executor.3/13650:
3 locks held by syz-executor.3/13651:
4 locks held by syz-executor.3/13653:
3 locks held by syz-executor.3/13652:
3 locks held by syz-executor.3/13654:
3 locks held by syz-executor.3/13655:
3 locks held by syz-executor.3/13657:
1 lock held by syz-executor.3/13658:
1 lock held by syz-executor.3/13659:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
4 locks held by syz-executor.3/13660:
3 locks held by syz-executor.3/13661:
3 locks held by syz-executor.3/13663:
3 locks held by syz-executor.3/13666:
1 lock held by syz-executor.3/13667:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
3 locks held by syz-executor.3/13670:
1 lock held by syz-executor.3/13671:
1 lock held by syz-executor.3/13672:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
1 lock held by syz-executor.3/13673:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
3 locks held by syz-executor.3/13674:
3 locks held by syz-executor.3/13675:
3 locks held by syz-executor.3/13676:
1 lock held by syz-executor.3/13677:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
3 locks held by syz-executor.3/13678:
1 lock held by syz-executor.3/13679:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
3 locks held by syz-executor.3/13681:
3 locks held by syz-executor.3/13682:
1 lock held by syz-executor.3/13683:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
3 locks held by syz-executor.3/13684:
3 locks held by syz-executor.3/13685:
3 locks held by syz-executor.3/13686:
3 locks held by syz-executor.3/13687:
1 lock held by syz-executor.3/13688:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
3 locks held by syz-executor.3/13689:
2 locks held by syz-executor.3/13690:
3 locks held by syz-executor.3/13691:
3 locks held by syz-executor.3/13692:
1 lock held by syz-executor.3/13693:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
3 locks held by syz-executor.3/13694:
1 lock held by syz-executor.3/13696:
 #0: ffffffff8cbad490 (dup_mmap_sem){++++}-{0:0}, at: dup_mmap+0xc7/0xfd0 kernel/fork.c:497
3 locks held by syz-executor.3/13701:
3 locks held by syz-executor.3/13702:
3 locks held by syz-executor.3/13703:
3 locks held by syz-executor.3/13704:
3 locks held by syz-executor.3/13705:
1 lock held by syz-executor.3/13708:
3 locks held by syz-executor.3/13709:
3 locks held by syz-executor.3/13710:
1 lock held by syz-executor.3/13711:
3 locks held by syz-executor.3/13713:

Crashes (4):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-smack-root 2022/01/12 13:50 upstream daadb3bd0e8d 44d1319a .config log report info INFO: task hung in uprobe_start_dup_mmap
ci-upstream-kasan-gce-root 2022/01/11 05:47 upstream df0cc57e057f ddb0ab8c .config log report info INFO: task hung in uprobe_start_dup_mmap
ci-upstream-kasan-gce-root 2021/12/31 07:48 upstream 74c78b4291b4 36bd2e48 .config log report info INFO: task hung in uprobe_start_dup_mmap
ci-upstream-kasan-gce-smack-root 2021/12/28 17:45 upstream a8ad9a2434dc 76c8cf06 .config log report info INFO: task hung in uprobe_start_dup_mmap
* Struck through repros no longer work on HEAD.