Memory cgroup stats for /syz3: cache:40KB rss:195636KB rss_huge:176128KB shmem:52KB mapped_file:0KB dirty:0KB writeback:0KB swap:0KB inactive_anon:17192KB active_anon:15336KB inactive_file:0KB active_file:4KB unevictable:163248KB
Memory cgroup out of memory: Kill process 2534 (syz-executor3) score 344 or sacrifice child
Killed process 2543 (syz-executor3) total-vm:70472kB, anon-rss:18076kB, file-rss:32768kB, shmem-rss:0kB
INFO: task syz-executor5:2482 blocked for more than 140 seconds.
      Not tainted 4.19.0-rc6+ #269
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor5   D19456  2482  16193 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2825 [inline]
 __schedule+0x86c/0x1ed0 kernel/sched/core.c:3473
 schedule+0xfe/0x460 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]
 down_read+0xbe/0x1d0 kernel/locking/rwsem.c:26
 __get_super.part.11+0x207/0x2e0 fs/super.c:698
 __get_super include/linux/spinlock.h:329 [inline]
 get_super+0x2d/0x50 fs/super.c:727
 fsync_bdev+0x17/0xc0 fs/block_dev.c:469
 invalidate_partition+0x35/0x60 block/genhd.c:1561
 drop_partitions.isra.14+0xe1/0x200 block/partition-generic.c:445
 rescan_partitions+0x72/0x8e0 block/partition-generic.c:518
 __blkdev_reread_part+0x1ad/0x230 block/ioctl.c:173
 blkdev_reread_part+0x26/0x40 block/ioctl.c:193
 loop_reread_partitions+0x163/0x190 drivers/block/loop.c:645
 loop_clr_fd+0xa07/0xd00 drivers/block/loop.c:1098
 lo_ioctl+0x875/0x1d80 drivers/block/loop.c:1416
 __blkdev_driver_ioctl block/ioctl.c:303 [inline]
 blkdev_ioctl+0x9ac/0x2010 block/ioctl.c:601
 block_ioctl+0xee/0x130 fs/block_dev.c:1883
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:501 [inline]
 do_vfs_ioctl+0x1de/0x1720 fs/ioctl.c:685
 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:702
 __do_sys_ioctl fs/ioctl.c:709 [inline]
 __se_sys_ioctl fs/ioctl.c:707 [inline]
 __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:707
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4573e7
Code: Bad RIP value.
RSP: 002b:00007f8c6afada18 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f8c6afae6d4 RCX: 00000000004573e7
RDX: 0000000000000000 RSI: 0000000000004c01 RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000000000 R09: 000000000000000c
R10: 0000000000000064 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000004 R14: 0000000000000005 R15: 00000000ffffffff
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 PID: 982 Comm: khungtaskd Not tainted 4.19.0-rc6+ #269
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+0x1c4/0x2b4 lib/dump_stack.c:113
 nmi_cpu_backtrace.cold.3+0x63/0xa2 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x1b3/0x1ed 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+0xb3e/0x1050 kernel/hung_task.c:265
 kthread+0x35a/0x420 kernel/kthread.c:246
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:413
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 3194 Comm: udevd Not tainted 4.19.0-rc6+ #269
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:write_comp_data+0x1/0x70 kernel/kcov.c:116
Code: d5 61 43 00 e9 a6 fc ff ff 4c 89 f7 e8 28 61 43 00 e9 6f fc ff ff e8 9e f7 c9 ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 <65> 4c 8b 04 25 40 ee 01 00 65 8b 05 af 38 83 7e a9 00 01 1f 00 48
RSP: 0018:ffff8801c831f780 EFLAGS: 00000246
RAX: ffff8801c8312140 RBX: 0000000000000000 RCX: ffffffff816db80a
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005
RBP: ffff8801c831f790 R08: ffff8801c8312140 R09: 000000000000000e
R10: ffffed003908ca88 R11: 0000000000000001 R12: ffff8801c831faa8
R13: 0000000000000078 R14: ffff8801c831f968 R15: ffff8801c831f8e8
FS:  00007fe82b3c37a0(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000004573bd CR3: 00000001c8165000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ktime_get_ts64+0x9a/0x530 kernel/time/timekeeping.c:883
 select_estimate_accuracy+0xde/0x4b0 fs/select.c:87
 ep_poll+0x6d9/0x13d0 fs/eventpoll.c:1758
 do_epoll_wait+0x1b0/0x200 fs/eventpoll.c:2198
 __do_sys_epoll_wait fs/eventpoll.c:2208 [inline]
 __se_sys_epoll_wait fs/eventpoll.c:2205 [inline]
 __x64_sys_epoll_wait+0x97/0xf0 fs/eventpoll.c:2205
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7fe82aad7943
Code: 00 31 d2 48 29 c2 64 89 11 48 83 c8 ff eb ea 90 90 90 90 90 90 90 90 83 3d b5 dc 2a 00 00 75 13 49 89 ca b8 e8 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 34 c3 48 83 ec 08 e8 3b c4 00 00 48 89 04 24
RSP: 002b:00007ffecec8e748 EFLAGS: 00000246 ORIG_RAX: 00000000000000e8
RAX: ffffffffffffffda RBX: 0000000000000bb8 RCX: 00007fe82aad7943
RDX: 0000000000000008 RSI: 00007ffecec8e840 RDI: 000000000000000a
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000bb8 R11: 0000000000000246 R12: 0000000000000003
R13: 0000000000000000 R14: 00000000015ceaf0 R15: 00000000015c7250