INFO: task syz-executor.2:9101 blocked for more than 143 seconds.
Not tainted 5.2.0-rc4 #25
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.2 D27408 9101 9092 0x80004004
Call Trace:
context_switch kernel/sched/core.c:2818 [inline]
__schedule+0x7cb/0x1560 kernel/sched/core.c:3445
schedule+0xa8/0x260 kernel/sched/core.c:3509
__rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:601 [inline]
rwsem_down_write_failed+0x7a1/0xc60 kernel/locking/rwsem-xadd.c:633
__down_write kernel/locking/rwsem.h:227 [inline]
down_write+0x93/0xa0 kernel/locking/rwsem.c:68
lock_anon_vma_root mm/rmap.c:238 [inline]
unlink_anon_vmas+0x184/0x870 mm/rmap.c:388
free_pgtables+0xe6/0x2f0 mm/memory.c:381
exit_mmap+0x2bc/0x510 mm/mmap.c:3146
__mmput kernel/fork.c:1059 [inline]
mmput+0x15f/0x4c0 kernel/fork.c:1080
exit_mm kernel/exit.c:547 [inline]
do_exit+0x816/0x2fa0 kernel/exit.c:864
do_group_exit+0x135/0x370 kernel/exit.c:981
get_signal+0x471/0x24b0 kernel/signal.c:2640
do_signal+0x87/0x1900 arch/x86/kernel/signal.c:815
exit_to_usermode_loop+0x244/0x2c0 arch/x86/entry/common.c:164
prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
syscall_return_slowpath arch/x86/entry/common.c:279 [inline]
do_syscall_64+0x58e/0x680 arch/x86/entry/common.c:304
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x41320a
Code: 86 cd 00 00 00 48 89 d3 31 d2 48 f7 f3 48 c7 41 30 00 00 00 00 48 c7 41 40 ff ff ff ff 48 89 41 38 48 c7 41 48 00 00 00 00 48 <c7> 41 50 00 00 00 00 48 8b 41 38 48 89 04 24 e8 82 16 01 00 48 8b
RSP: 002b:00007fffaece57b8 EFLAGS: 00000246 ORIG_RAX: 000000000000003d
RAX: fffffffffffffe00 RBX: 000000000000238e RCX: 000000000041320a
RDX: 0000000040000000 RSI: 00007fffaece57c4 RDI: ffffffffffffffff
RBP: 00000000000000f8 R08: 000000000000238d R09: 0000555556044940
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000075c9a8
R13: 00007fffaece5a48 R14: 0000000000000000 R15: 0000000000000000
Showing all locks held in the system:
1 lock held by khungtaskd/1043:
#0: 0000000072f26752 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:5149
2 locks held by getty/9054:
#0: 00000000f68d499b (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
#1: 000000005f74cb3b (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156
2 locks held by getty/9055:
#0: 000000008378da72 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
#1: 0000000055c9b300 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156
2 locks held by getty/9056:
#0: 00000000a3e3e128 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
#1: 000000004cf1a984 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156
2 locks held by getty/9057:
#0: 00000000c3adc4f5 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
#1: 00000000433b6b8d (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156
2 locks held by getty/9058:
#0: 0000000039cab31c (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
#1: 00000000c1218f6e (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156
2 locks held by getty/9059:
#0: 000000009189e419 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
#1: 0000000089127836 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156
2 locks held by getty/9060:
#0: 000000005450d957 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
#1: 00000000147a8d59 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156
1 lock held by syz-executor.2/9101:
#0: 00000000c5bff859 (&anon_vma->rwsem){++++}, at: lock_anon_vma_root mm/rmap.c:238 [inline]
#0: 00000000c5bff859 (&anon_vma->rwsem){++++}, at: unlink_anon_vmas+0x184/0x870 mm/rmap.c:388
1 lock held by syz-executor.2/17795:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 1043 Comm: khungtaskd Not tainted 5.2.0-rc4 #25
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:205 [inline]
watchdog+0x9b7/0xec0 kernel/hung_task.c:289
kthread+0x354/0x420 kernel/kthread.c:255
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0 skipped: idling at native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:60