INFO: task hung in uprobe_start_dup_mmap

From: syzbot
Date: Thu Sep 06 2018 - 12:59:07 EST

Next message: Santosh Shilimkar: "Re: [PATCH] memory: ti-aemif: fix a potential NULL-pointer dereference"
Previous message: Michael S. Tsirkin: "Re: [PATCH net-next 02/11] tuntap: switch to use XDP_PACKET_HEADROOM"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

Hello,

syzbot found the following crash on:

HEAD commit: f2b6e66e9885 Add linux-next specific files for 20180904
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=175217e1400000
kernel config: https://syzkaller.appspot.com/x/.config?x=15ad48400e39c1b3
dashboard link: https://syzkaller.appspot.com/bug?extid=cad3df271fa4d88da051
compiler: gcc (GCC) 8.0.1 20180413 (experimental)

Unfortunately, I don't have any reproducer for this crash yet.

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+cad3df271fa4d88da051@xxxxxxxxxxxxxxxxxxxxxxxxx

hfs: can't find a HFS filesystem on dev loop3
INFO: task udevd:4711 blocked for more than 140 seconds.
Not tainted 4.19.0-rc2-next-20180904+ #55
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
udevd D22488 4711 2538 0x00000000
Call Trace:
context_switch kernel/sched/core.c:2825 [inline]
__schedule+0x87c/0x1df0 kernel/sched/core.c:3473
schedule+0xfb/0x450 kernel/sched/core.c:3517
__rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline]
rwsem_down_read_failed+0x362/0x610 kernel/locking/rwsem-xadd.c:286
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+0x16e/0x210 kernel/locking/percpu-rwsem.c:85
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+0x99/0xa0 kernel/events/uprobes.c:1259
dup_mmap kernel/fork.c:431 [inline]
dup_mm kernel/fork.c:1275 [inline]
copy_mm kernel/fork.c:1330 [inline]
copy_process+0x2b3d/0x7af0 kernel/fork.c:1870
_do_fork+0x1ca/0x1170 kernel/fork.c:2169
__do_sys_clone kernel/fork.c:2276 [inline]
__se_sys_clone kernel/fork.c:2270 [inline]
__x64_sys_clone+0xbf/0x150 kernel/fork.c:2270
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f78fd4a8f46
Code: Bad RIP value.
RSP: 002b:00007ffcefe84b40 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffcefe84b40 RCX: 00007f78fd4a8f46
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffcefe84ba0 R08: 0000000000001267 R09: 0000000000001267
R10: 00007f78fddc5a70 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffcefe84b60 R14: 0000000000000005 R15: 0000000000000005
INFO: task udevd:4712 blocked for more than 140 seconds.
Not tainted 4.19.0-rc2-next-20180904+ #55
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
udevd D22488 4712 2538 0x00000000
Call Trace:
context_switch kernel/sched/core.c:2825 [inline]
__schedule+0x87c/0x1df0 kernel/sched/core.c:3473
schedule+0xfb/0x450 kernel/sched/core.c:3517
__rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline]
rwsem_down_read_failed+0x362/0x610 kernel/locking/rwsem-xadd.c:286
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+0x16e/0x210 kernel/locking/percpu-rwsem.c:85
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+0x99/0xa0 kernel/events/uprobes.c:1259
dup_mmap kernel/fork.c:431 [inline]
dup_mm kernel/fork.c:1275 [inline]
copy_mm kernel/fork.c:1330 [inline]
copy_process+0x2b3d/0x7af0 kernel/fork.c:1870
_do_fork+0x1ca/0x1170 kernel/fork.c:2169
__do_sys_clone kernel/fork.c:2276 [inline]
__se_sys_clone kernel/fork.c:2270 [inline]
__x64_sys_clone+0xbf/0x150 kernel/fork.c:2270
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f78fd4a8f46
Code: Bad RIP value.
RSP: 002b:00007ffcefe84b40 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffcefe84b40 RCX: 00007f78fd4a8f46
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffcefe84ba0 R08: 0000000000001268 R09: 0000000000001268
R10: 00007f78fddc5a70 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffcefe84b60 R14: 0000000000000005 R15: 0000000000000005
INFO: task syz-executor0:4752 blocked for more than 140 seconds.
Not tainted 4.19.0-rc2-next-20180904+ #55
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor0 D21560 4752 1 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2825 [inline]
__schedule+0x87c/0x1df0 kernel/sched/core.c:3473
schedule+0xfb/0x450 kernel/sched/core.c:3517
__rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline]
rwsem_down_read_failed+0x362/0x610 kernel/locking/rwsem-xadd.c:286
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+0x16e/0x210 kernel/locking/percpu-rwsem.c:85
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+0x99/0xa0 kernel/events/uprobes.c:1259
dup_mmap kernel/fork.c:431 [inline]
dup_mm kernel/fork.c:1275 [inline]
copy_mm kernel/fork.c:1330 [inline]
copy_process+0x2b3d/0x7af0 kernel/fork.c:1870
_do_fork+0x1ca/0x1170 kernel/fork.c:2169
__do_sys_clone kernel/fork.c:2276 [inline]
__se_sys_clone kernel/fork.c:2270 [inline]
__x64_sys_clone+0xbf/0x150 kernel/fork.c:2270
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45574a
Code: Bad RIP value.
RSP: 002b:00007ffdcdf7a290 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffdcdf7a290 RCX: 000000000045574a
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffdcdf7a2d0 R08: 0000000000000001 R09: 00000000011d9940
R10: 00000000011d9c10 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: badc0ffeebadface
INFO: task syz-executor1:4754 blocked for more than 140 seconds.
Not tainted 4.19.0-rc2-next-20180904+ #55
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor1 D21032 4754 1 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2825 [inline]
__schedule+0x87c/0x1df0 kernel/sched/core.c:3473
schedule+0xfb/0x450 kernel/sched/core.c:3517
__rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline]
rwsem_down_read_failed+0x362/0x610 kernel/locking/rwsem-xadd.c:286
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+0x16e/0x210 kernel/locking/percpu-rwsem.c:85
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+0x99/0xa0 kernel/events/uprobes.c:1259
dup_mmap kernel/fork.c:431 [inline]
dup_mm kernel/fork.c:1275 [inline]
copy_mm kernel/fork.c:1330 [inline]
copy_process+0x2b3d/0x7af0 kernel/fork.c:1870
_do_fork+0x1ca/0x1170 kernel/fork.c:2169
__do_sys_clone kernel/fork.c:2276 [inline]
__se_sys_clone kernel/fork.c:2270 [inline]
__x64_sys_clone+0xbf/0x150 kernel/fork.c:2270
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45574a
Code: Bad RIP value.
RSP: 002b:00007fff590938d0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007fff590938d0 RCX: 000000000045574a
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007fff59093910 R08: 0000000000000001 R09: 0000000001d2a940
R10: 0000000001d2ac10 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: badc0ffeebadface
INFO: task syz-executor6:4756 blocked for more than 140 seconds.
Not tainted 4.19.0-rc2-next-20180904+ #55
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor6 D21184 4756 1 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2825 [inline]
__schedule+0x87c/0x1df0 kernel/sched/core.c:3473
schedule+0xfb/0x450 kernel/sched/core.c:3517
__rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline]
rwsem_down_read_failed+0x362/0x610 kernel/locking/rwsem-xadd.c:286
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+0x16e/0x210 kernel/locking/percpu-rwsem.c:85
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+0x99/0xa0 kernel/events/uprobes.c:1259
dup_mmap kernel/fork.c:431 [inline]
dup_mm kernel/fork.c:1275 [inline]
copy_mm kernel/fork.c:1330 [inline]
copy_process+0x2b3d/0x7af0 kernel/fork.c:1870
_do_fork+0x1ca/0x1170 kernel/fork.c:2169
__do_sys_clone kernel/fork.c:2276 [inline]
__se_sys_clone kernel/fork.c:2270 [inline]
__x64_sys_clone+0xbf/0x150 kernel/fork.c:2270
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45574a
Code: Bad RIP value.
RSP: 002b:00007ffce5b71030 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffce5b71030 RCX: 000000000045574a
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffce5b71070 R08: 0000000000000001 R09: 0000000002588940
R10: 0000000002588c10 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: badc0ffeebadface
INFO: task syz-executor7:4758 blocked for more than 140 seconds.
Not tainted 4.19.0-rc2-next-20180904+ #55
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor7 D21184 4758 1 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2825 [inline]
__schedule+0x87c/0x1df0 kernel/sched/core.c:3473
schedule+0xfb/0x450 kernel/sched/core.c:3517
__rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline]
rwsem_down_read_failed+0x362/0x610 kernel/locking/rwsem-xadd.c:286
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+0x16e/0x210 kernel/locking/percpu-rwsem.c:85
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+0x99/0xa0 kernel/events/uprobes.c:1259
dup_mmap kernel/fork.c:431 [inline]
dup_mm kernel/fork.c:1275 [inline]
copy_mm kernel/fork.c:1330 [inline]
copy_process+0x2b3d/0x7af0 kernel/fork.c:1870
_do_fork+0x1ca/0x1170 kernel/fork.c:2169
__do_sys_clone kernel/fork.c:2276 [inline]
__se_sys_clone kernel/fork.c:2270 [inline]
__x64_sys_clone+0xbf/0x150 kernel/fork.c:2270
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45574a
Code: Bad RIP value.
RSP: 002b:00007ffc193b1590 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffc193b1590 RCX: 000000000045574a
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffc193b15d0 R08: 0000000000000001 R09: 0000000001c79940
R10: 0000000001c79c10 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: badc0ffeebadface
INFO: task udevd:6793 blocked for more than 140 seconds.
Not tainted 4.19.0-rc2-next-20180904+ #55
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
udevd D22488 6793 2538 0x00000000
Call Trace:
context_switch kernel/sched/core.c:2825 [inline]
__schedule+0x87c/0x1df0 kernel/sched/core.c:3473
schedule+0xfb/0x450 kernel/sched/core.c:3517
__rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline]
rwsem_down_read_failed+0x362/0x610 kernel/locking/rwsem-xadd.c:286
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+0x16e/0x210 kernel/locking/percpu-rwsem.c:85
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+0x99/0xa0 kernel/events/uprobes.c:1259
dup_mmap kernel/fork.c:431 [inline]
dup_mm kernel/fork.c:1275 [inline]
copy_mm kernel/fork.c:1330 [inline]
copy_process+0x2b3d/0x7af0 kernel/fork.c:1870
_do_fork+0x1ca/0x1170 kernel/fork.c:2169
__do_sys_clone kernel/fork.c:2276 [inline]
__se_sys_clone kernel/fork.c:2270 [inline]
__x64_sys_clone+0xbf/0x150 kernel/fork.c:2270
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f78fd4a8f46
Code: Bad RIP value.
RSP: 002b:00007ffcefe84b40 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffcefe84b40 RCX: 00007f78fd4a8f46
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffcefe84ba0 R08: 0000000000001a89 R09: 0000000000001a89
R10: 00007f78fddc5a70 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffcefe84b60 R14: 0000000000000005 R15: 0000000000000005
INFO: task udevd:6805 blocked for more than 140 seconds.
Not tainted 4.19.0-rc2-next-20180904+ #55
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
udevd D22488 6805 2538 0x00000000
Call Trace:
context_switch kernel/sched/core.c:2825 [inline]
__schedule+0x87c/0x1df0 kernel/sched/core.c:3473
schedule+0xfb/0x450 kernel/sched/core.c:3517
__rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline]
rwsem_down_read_failed+0x362/0x610 kernel/locking/rwsem-xadd.c:286
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+0x16e/0x210 kernel/locking/percpu-rwsem.c:85
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+0x99/0xa0 kernel/events/uprobes.c:1259
dup_mmap kernel/fork.c:431 [inline]
dup_mm kernel/fork.c:1275 [inline]
copy_mm kernel/fork.c:1330 [inline]
copy_process+0x2b3d/0x7af0 kernel/fork.c:1870
_do_fork+0x1ca/0x1170 kernel/fork.c:2169
__do_sys_clone kernel/fork.c:2276 [inline]
__se_sys_clone kernel/fork.c:2270 [inline]
__x64_sys_clone+0xbf/0x150 kernel/fork.c:2270
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f78fd4a8f46
Code: Bad RIP value.
RSP: 002b:00007ffcefe84b40 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffcefe84b40 RCX: 00007f78fd4a8f46
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffcefe84ba0 R08: 0000000000001a95 R09: 0000000000001a95
R10: 00007f78fddc5a70 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffcefe84b60 R14: 0000000000000005 R15: 0000000000000005
INFO: task udevd:6813 blocked for more than 140 seconds.
Not tainted 4.19.0-rc2-next-20180904+ #55
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
udevd D22488 6813 2538 0x00000000
Call Trace:
context_switch kernel/sched/core.c:2825 [inline]
__schedule+0x87c/0x1df0 kernel/sched/core.c:3473
schedule+0xfb/0x450 kernel/sched/core.c:3517
__rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline]
rwsem_down_read_failed+0x362/0x610 kernel/locking/rwsem-xadd.c:286
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+0x16e/0x210 kernel/locking/percpu-rwsem.c:85
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+0x99/0xa0 kernel/events/uprobes.c:1259
dup_mmap kernel/fork.c:431 [inline]
dup_mm kernel/fork.c:1275 [inline]
copy_mm kernel/fork.c:1330 [inline]
copy_process+0x2b3d/0x7af0 kernel/fork.c:1870
_do_fork+0x1ca/0x1170 kernel/fork.c:2169
__do_sys_clone kernel/fork.c:2276 [inline]
__se_sys_clone kernel/fork.c:2270 [inline]
__x64_sys_clone+0xbf/0x150 kernel/fork.c:2270
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f78fd4a8f46
Code: Bad RIP value.
RSP: 002b:00007ffcefe84b40 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffcefe84b40 RCX: 00007f78fd4a8f46
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffcefe84ba0 R08: 0000000000001a9d R09: 0000000000001a9d
R10: 00007f78fddc5a70 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffcefe84b60 R14: 0000000000000005 R15: 0000000000000005
INFO: task udevd:7279 blocked for more than 140 seconds.
Not tainted 4.19.0-rc2-next-20180904+ #55
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
udevd D22944 7279 2538 0x00000000
Call Trace:
context_switch kernel/sched/core.c:2825 [inline]
__schedule+0x87c/0x1df0 kernel/sched/core.c:3473
schedule+0xfb/0x450 kernel/sched/core.c:3517
__rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline]
rwsem_down_read_failed+0x362/0x610 kernel/locking/rwsem-xadd.c:286
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+0x16e/0x210 kernel/locking/percpu-rwsem.c:85
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+0x99/0xa0 kernel/events/uprobes.c:1259
dup_mmap kernel/fork.c:431 [inline]
dup_mm kernel/fork.c:1275 [inline]
copy_mm kernel/fork.c:1330 [inline]
copy_process+0x2b3d/0x7af0 kernel/fork.c:1870
_do_fork+0x1ca/0x1170 kernel/fork.c:2169
__do_sys_clone kernel/fork.c:2276 [inline]
__se_sys_clone kernel/fork.c:2270 [inline]
__x64_sys_clone+0xbf/0x150 kernel/fork.c:2270
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f78fd4a8f46
Code: Bad RIP value.
RSP: 002b:00007ffcefe84b40 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffcefe84b40 RCX: 00007f78fd4a8f46
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffcefe84ba0 R08: 0000000000001c6f R09: 0000000000001c6f
R10: 00007f78fddc5a70 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffcefe84b60 R14: 0000000000000005 R15: 0000000000000005

Showing all locks held in the system:
1 lock held by khungtaskd/792:
#0: 00000000010c3b8a (rcu_read_lock){....}, at: debug_show_all_locks+0xd0/0x428 kernel/locking/lockdep.c:4436
1 lock held by rsyslogd/4614:
2 locks held by getty/4704:
#0: 000000007272e650 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:353
#1: 00000000d0ad5199 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140
2 locks held by getty/4705:
#0: 00000000ee01b3d2 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:353
#1: 00000000cb4b72e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140
2 locks held by getty/4706:
#0: 00000000b1d1bfa1 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:353
#1: 00000000d8a1ad0c (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140
2 locks held by getty/4707:
#0: 00000000d748ecc1 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:353
#1: 000000003e534095 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140
2 locks held by getty/4708:
#0: 000000008ec58632 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:353
#1: 00000000f247898c (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140
2 locks held by getty/4709:
#0: 000000001ebc9104 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:353
#1: 00000000c5deaf68 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140
2 locks held by getty/4710:
#0: 00000000da7ef2b1 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:353
#1: 000000003a231089 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140
1 lock held by udevd/4711:
#0: 00000000077431f3 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:431 [inline]
#0: 00000000077431f3 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1275 [inline]
#0: 00000000077431f3 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1330 [inline]
#0: 00000000077431f3 (&dup_mmap_sem){++++}, at: copy_process+0x2b3d/0x7af0 kernel/fork.c:1870
1 lock held by udevd/4712:
#0: 00000000077431f3 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:431 [inline]
#0: 00000000077431f3 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1275 [inline]
#0: 00000000077431f3 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1330 [inline]
#0: 00000000077431f3 (&dup_mmap_sem){++++}, at: copy_process+0x2b3d/0x7af0 kernel/fork.c:1870
1 lock held by syz-executor0/4752:
#0: 00000000077431f3 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:431 [inline]
#0: 00000000077431f3 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1275 [inline]
#0: 00000000077431f3 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1330 [inline]
#0: 00000000077431f3 (&dup_mmap_sem){++++}, at: copy_process+0x2b3d/0x7af0 kernel/fork.c:1870
1 lock held by syz-executor1/4754:
#0: 00000000077431f3 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:431 [inline]
#0: 00000000077431f3 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1275 [inline]
#0: 00000000077431f3 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1330 [inline]
#0: 00000000077431f3 (&dup_mmap_sem){++++}, at: copy_process+0x2b3d/0x7af0 kernel/fork.c:1870
1 lock held by syz-executor6/4756:
#0: 00000000077431f3 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:431 [inline]
#0: 00000000077431f3 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1275 [inline]
#0: 00000000077431f3 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1330 [inline]
#0: 00000000077431f3 (&dup_mmap_sem){++++}, at: copy_process+0x2b3d/0x7af0 kernel/fork.c:1870
1 lock held by syz-executor7/4758:
#0: 00000000077431f3 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:431 [inline]
#0: 00000000077431f3 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1275 [inline]
#0: 00000000077431f3 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1330 [inline]
#0: 00000000077431f3 (&dup_mmap_sem){++++}, at: copy_process+0x2b3d/0x7af0 kernel/fork.c:1870
1 lock held by udevd/6793:
#0: 00000000077431f3 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:431 [inline]
#0: 00000000077431f3 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1275 [inline]
#0: 00000000077431f3 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1330 [inline]
#0: 00000000077431f3 (&dup_mmap_sem){++++}, at: copy_process+0x2b3d/0x7af0 kernel/fork.c:1870
1 lock held by udevd/6805:
#0: 00000000077431f3 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:431 [inline]
#0: 00000000077431f3 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1275 [inline]
#0: 00000000077431f3 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1330 [inline]
#0: 00000000077431f3 (&dup_mmap_sem){++++}, at: copy_process+0x2b3d/0x7af0 kernel/fork.c:1870
1 lock held by udevd/6813:
#0: 00000000077431f3 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:431 [inline]
#0: 00000000077431f3 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1275 [inline]
#0: 00000000077431f3 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1330 [inline]
#0: 00000000077431f3 (&dup_mmap_sem){++++}, at: copy_process+0x2b3d/0x7af0 kernel/fork.c:1870
1 lock held by udevd/7279:
#0: 00000000077431f3 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:431 [inline]
#0: 00000000077431f3 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1275 [inline]
#0: 00000000077431f3 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1330 [inline]
#0: 00000000077431f3 (&dup_mmap_sem){++++}, at: copy_process+0x2b3d/0x7af0 kernel/fork.c:1870
1 lock held by syz-executor0/18570:
#0: 00000000077431f3 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:431 [inline]
#0: 00000000077431f3 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1275 [inline]
#0: 00000000077431f3 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1330 [inline]
#0: 00000000077431f3 (&dup_mmap_sem){++++}, at: copy_process+0x2b3d/0x7af0 kernel/fork.c:1870
1 lock held by syz-executor5/30110:
#0: 00000000df7208fd (event_mutex){+.+.}, at: perf_trace_destroy+0x28/0x100 kernel/trace/trace_event_perf.c:236
5 locks held by syz-executor5/30115:
#0: 00000000432a4d43 (&sig->cred_guard_mutex){+.+.}, at: __do_sys_perf_event_open+0x12fe/0x2f30 kernel/events/core.c:10480
#1: 0000000043990672 (&pmus_srcu){....}, at: perf_event_alloc.part.93+0xffc/0x33c0 kernel/events/core.c:10039
#2: 00000000df7208fd (event_mutex){+.+.}, at: perf_uprobe_init+0x1da/0x280 kernel/trace/trace_event_perf.c:327
#3: 00000000eb6356ce (&uprobe->register_rwsem){+.+.}, at: __uprobe_register kernel/events/uprobes.c:922 [inline]
#3: 00000000eb6356ce (&uprobe->register_rwsem){+.+.}, at: uprobe_register+0x3dd/0x7c0 kernel/events/uprobes.c:941
#4: 00000000077431f3 (&dup_mmap_sem){++++}, at: percpu_down_write+0xaf/0x540 kernel/locking/percpu-rwsem.c:145
1 lock held by syz-executor4/30114:
#0: 00000000df7208fd (event_mutex){+.+.}, at: perf_trace_destroy+0x28/0x100 kernel/trace/trace_event_perf.c:236
3 locks held by syz-executor4/30117:
#0: 000000007654572a (&sig->cred_guard_mutex){+.+.}, at: __do_sys_perf_event_open+0x12fe/0x2f30 kernel/events/core.c:10480
#1: 0000000043990672 (&pmus_srcu){....}, at: perf_event_alloc.part.93+0xffc/0x33c0 kernel/events/core.c:10039
kworker/dying (7) used greatest stack depth: 11432 bytes left
#2: 00000000df7208fd (event_mutex){+.+.}, at: perf_trace_init+0x50/0x250 kernel/trace/trace_event_perf.c:218
3 locks held by syz-executor3/30125:
#0: 00000000fc87ade4 (&sig->cred_guard_mutex){+.+.}, at: __do_sys_perf_event_open+0x12fe/0x2f30 kernel/events/core.c:10480
#1: 0000000043990672 (&pmus_srcu){....}, at: perf_event_alloc.part.93+0xffc/0x33c0 kernel/events/core.c:10039
#2: 00000000df7208fd (event_mutex){+.+.}, at: perf_trace_init+0x50/0x250 kernel/trace/trace_event_perf.c:218
3 locks held by syz-executor2/30129:
#0: 00000000d282122d (&sig->cred_guard_mutex){+.+.}, at: __do_sys_perf_event_open+0x12fe/0x2f30 kernel/events/core.c:10480
#1: 0000000043990672 (&pmus_srcu){....}, at: perf_event_alloc.part.93+0xffc/0x33c0 kernel/events/core.c:10039
#2: 00000000df7208fd (event_mutex){+.+.}, at: perf_trace_init+0x50/0x250 kernel/trace/trace_event_perf.c:218

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

NMI backtrace for cpu 0
CPU: 0 PID: 792 Comm: khungtaskd Not tainted 4.19.0-rc2-next-20180904+ #55
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113
nmi_cpu_backtrace.cold.3+0x48/0x88 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x151/0x192 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:144 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:204 [inline]
watchdog+0xb39/0x1040 kernel/hung_task.c:265
kthread+0x35a/0x420 kernel/kthread.c:246
ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:415
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1 skipped: idling at native_safe_halt+0x6/0x10 arch/x86/include/asm/irqflags.h:57

---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxxx

syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#bug-status-tracking for how to communicate with syzbot.

Next message: Santosh Shilimkar: "Re: [PATCH] memory: ti-aemif: fix a potential NULL-pointer dereference"
Previous message: Michael S. Tsirkin: "Re: [PATCH net-next 02/11] tuntap: switch to use XDP_PACKET_HEADROOM"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]