RAX: 00007f58aba4b850 RBX: 0000000000000003 RCX: 000000000000000e
RDX: 00000000000003ff RSI: 0000000020012fe0 RDI: 00007f58aba4b850
RBP: 000000000073bf00 R08: 00000000000003ff R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f58aba4c6d4
R13: 00000000004c6856 R14: 00000000004dbcc0 R15: 00000000ffffffff
INFO: task syz-executor2:10173 blocked for more than 140 seconds.
      Not tainted 5.0.0-rc5 #60
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor2   D29520 10173   8023 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2844 [inline]
 __schedule+0x817/0x1cc0 kernel/sched/core.c:3485
 schedule+0x92/0x180 kernel/sched/core.c:3529
 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:287 [inline]
 rwsem_down_read_failed+0x213/0x420 kernel/locking/rwsem-xadd.c:304
 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+0x49/0x90 kernel/locking/rwsem.c:26
 __get_super.part.0+0x203/0x2e0 fs/super.c:699
 __get_super include/linux/spinlock.h:329 [inline]
 __get_super_thawed+0x13a/0x2d0 fs/super.c:736
 get_super_thawed+0x18/0x20 fs/super.c:760
 quotactl_block fs/quota/quota.c:818 [inline]
 kernel_quotactl+0x1e8/0x13d0 fs/quota/quota.c:872
 __do_sys_quotactl fs/quota/quota.c:893 [inline]
 __se_sys_quotactl fs/quota/quota.c:890 [inline]
 __x64_sys_quotactl+0x97/0xf0 fs/quota/quota.c:890
 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457e39
Code: Bad RIP value.
RSP: 002b:00007fd8b8b01c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000457e39
RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000000
RBP: 000000000073bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd8b8b026d4
R13: 00000000004c49f3 R14: 00000000004d8288 R15: 00000000ffffffff
INFO: task syz-executor2:10191 blocked for more than 140 seconds.
      Not tainted 5.0.0-rc5 #60
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor2   D29136 10191   8023 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2844 [inline]
 __schedule+0x817/0x1cc0 kernel/sched/core.c:3485
 schedule+0x92/0x180 kernel/sched/core.c:3529
 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:584 [inline]
 rwsem_down_write_failed+0x774/0xc30 kernel/locking/rwsem-xadd.c:613
 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117
 __down_write arch/x86/include/asm/rwsem.h:142 [inline]
 down_write+0x53/0x90 kernel/locking/rwsem.c:72
 grab_super+0xaf/0x2c0 fs/super.c:384
 sget_userns+0x35a/0xd30 fs/super.c:512
 sget+0x10c/0x150 fs/super.c:571
 mount_bdev+0xff/0x3c0 fs/super.c:1132
 udf_mount+0x35/0x40 fs/udf/super.c:131
 mount_fs+0x106/0x3ff fs/super.c:1258
 vfs_kern_mount.part.0+0x6f/0x410 fs/namespace.c:959
 vfs_kern_mount fs/namespace.c:949 [inline]
 do_new_mount fs/namespace.c:2513 [inline]
 do_mount+0x581/0x2d30 fs/namespace.c:2847
 ksys_mount+0xdb/0x150 fs/namespace.c:3063
 __do_sys_mount fs/namespace.c:3077 [inline]
 __se_sys_mount fs/namespace.c:3074 [inline]
 __x64_sys_mount+0xbe/0x150 fs/namespace.c:3074
 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457e39
Code: Bad RIP value.
RSP: 002b:00007fd8b8ae0c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000457e39
RDX: 0000000020000100 RSI: 0000000020000080 RDI: 0000000020000040
RBP: 000000000073c040 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd8b8ae16d4
R13: 00000000004c3ba5 R14: 00000000004d6c50 R15: 00000000ffffffff
INFO: task syz-executor2:10192 blocked for more than 140 seconds.
      Not tainted 5.0.0-rc5 #60
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor2   D29728 10192   8023 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2844 [inline]
 __schedule+0x817/0x1cc0 kernel/sched/core.c:3485
 schedule+0x92/0x180 kernel/sched/core.c:3529
 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:287 [inline]
 rwsem_down_read_failed+0x213/0x420 kernel/locking/rwsem-xadd.c:304
 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+0x49/0x90 kernel/locking/rwsem.c:26
 __get_super.part.0+0x203/0x2e0 fs/super.c:699
 __get_super include/linux/spinlock.h:329 [inline]
 __get_super_thawed+0x13a/0x2d0 fs/super.c:736
 get_super_thawed+0x18/0x20 fs/super.c:760
 quotactl_block fs/quota/quota.c:818 [inline]
 kernel_quotactl+0x1e8/0x13d0 fs/quota/quota.c:872
 __do_sys_quotactl fs/quota/quota.c:893 [inline]
 __se_sys_quotactl fs/quota/quota.c:890 [inline]
 __x64_sys_quotactl+0x97/0xf0 fs/quota/quota.c:890
 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457e39
Code: Bad RIP value.
RSP: 002b:00007fd8b8abfc78 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000457e39
RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000000
RBP: 000000000073c0e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd8b8ac06d4
R13: 00000000004c49f3 R14: 00000000004d8288 R15: 00000000ffffffff

Showing all locks held in the system:
1 lock held by khungtaskd/1039:
 #0: 000000009ece3c2f (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:4389
2 locks held by rs:main Q:Reg/7887:
 #0: 00000000d18ccf5c (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 fs/file.c:795
 #1: 00000000bb276b86 (sb_writers#3){.+.+}, at: file_start_write include/linux/fs.h:2816 [inline]
 #1: 00000000bb276b86 (sb_writers#3){.+.+}, at: vfs_write+0x429/0x580 fs/read_write.c:548
1 lock held by rsyslogd/7889:
 #0: 0000000019c1d15c (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 fs/file.c:795
2 locks held by getty/7979:
 #0: 000000008401073d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
 #1: 0000000035ddc0cd (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154
2 locks held by getty/7980:
 #0: 00000000d2e1e2f1 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
 #1: 000000002748b8f3 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154
2 locks held by getty/7981:
 #0: 000000003db809ab (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
 #1: 000000002f4be6dd (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154
2 locks held by getty/7982:
 #0: 0000000051d71a9a (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
 #1: 00000000b4570610 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154
2 locks held by getty/7983:
 #0: 00000000e086802f (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
 #1: 00000000710adcd8 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154
2 locks held by getty/7984:
 #0: 00000000a8100bee (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
 #1: 00000000b121bddf (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154
2 locks held by getty/7985:
 #0: 0000000044444d23 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
 #1: 00000000554f8a7e (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154
2 locks held by syz-executor2/10170:
1 lock held by syz-executor2/10173:
 #0: 0000000033ac9b91 (&type->s_umount_key#60){++++}, at: __get_super.part.0+0x203/0x2e0 fs/super.c:699
2 locks held by syz-executor2/10191:
 #0: 000000003cde8748 (&bdev->bd_fsfreeze_mutex){+.+.}, at: mount_bdev+0x93/0x3c0 fs/super.c:1126
 #1: 0000000033ac9b91 (&type->s_umount_key#60){++++}, at: grab_super+0xaf/0x2c0 fs/super.c:384
1 lock held by syz-executor2/10192:
 #0: 0000000033ac9b91 (&type->s_umount_key#60){++++}, at: __get_super.part.0+0x203/0x2e0 fs/super.c:699

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

NMI backtrace for cpu 1
CPU: 1 PID: 1039 Comm: khungtaskd Not tainted 5.0.0-rc5 #60
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:203 [inline]
 watchdog+0x9df/0xee0 kernel/hung_task.c:287
 kthread+0x357/0x430 kernel/kthread.c:246
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
Sending NMI from CPU 1 to CPUs 0:
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.028 msecs
NMI backtrace for cpu 0
CPU: 0 PID: 10170 Comm: syz-executor2 Not tainted 5.0.0-rc5 #60
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__lock_release kernel/locking/lockdep.c:3592 [inline]
RIP: 0010:lock_release+0x1fb/0xa00 kernel/locking/lockdep.c:3860
Code: 00 00 48 89 c2 48 89 85 58 ff ff ff 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e 90 06 00 00 <49> c7 c6 a0 6a 55 8a 45 8b 88 78 08 00 00 48 b8 00 00 00 00 00 fc
RSP: 0018:ffff88804fa8f3a8 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 1ffff11009f51e7b RCX: 1ffffffff12b94c7
RDX: 1ffff1100a48a16f RSI: 0000000000000000 RDI: 0000000000000001
RBP: ffff88804fa8f460 R08: ffff888052450300 R09: ffffed1015d05bd0
R10: ffffed1015d05bcf R11: ffff8880ae82de7b R12: ffffffff889a4200
R13: ffffffff81898f19 R14: ffff888052450300 R15: ffff88804fa8f438
FS:  00007fd8b8b23700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000457e0f CR3: 000000005145c000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 rcu_lock_release include/linux/rcupdate.h:228 [inline]
 rcu_read_unlock include/linux/rcupdate.h:661 [inline]
 find_get_entry+0x530/0x8d0 mm/filemap.c:1506
 pagecache_get_page+0x4a/0x740 mm/filemap.c:1579
 find_get_page_flags include/linux/pagemap.h:278 [inline]
 __find_get_block_slow fs/buffer.c:205 [inline]
 __find_get_block fs/buffer.c:1294 [inline]
 __find_get_block+0x501/0xcc0 fs/buffer.c:1288
 __getblk_slow fs/buffer.c:1039 [inline]
 __getblk_gfp+0x1b1/0x960 fs/buffer.c:1320
 __bread_gfp+0x2f/0x300 fs/buffer.c:1354
 sb_bread include/linux/buffer_head.h:307 [inline]
 udf_tread+0xf1/0x140 fs/udf/misc.c:44
 udf_read_tagged+0x50/0x530 fs/udf/misc.c:210
 udf_check_anchor_block+0x1ef/0x680 fs/udf/super.c:1775
 udf_scan_anchors+0x1cf/0x680 fs/udf/super.c:1815
 udf_find_anchor fs/udf/super.c:1880 [inline]
 udf_load_vrs+0x8bf/0xc80 fs/udf/super.c:1937
 udf_fill_super+0x7d8/0x16d1 fs/udf/super.c:2132
 mount_bdev+0x307/0x3c0 fs/super.c:1159
 udf_mount+0x35/0x40 fs/udf/super.c:131
 mount_fs+0x106/0x3ff fs/super.c:1258
 vfs_kern_mount.part.0+0x6f/0x410 fs/namespace.c:959
 vfs_kern_mount fs/namespace.c:949 [inline]
 do_new_mount fs/namespace.c:2513 [inline]
 do_mount+0x581/0x2d30 fs/namespace.c:2847
 ksys_mount+0xdb/0x150 fs/namespace.c:3063
 __do_sys_mount fs/namespace.c:3077 [inline]
 __se_sys_mount fs/namespace.c:3074 [inline]
 __x64_sys_mount+0xbe/0x150 fs/namespace.c:3074
 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457e39
Code: ad b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fd8b8b22c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000457e39
RDX: 0000000020000100 RSI: 0000000020000080 RDI: 0000000020000040
RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd8b8b236d4
R13: 00000000004c3ba5 R14: 00000000004d6c50 R15: 00000000ffffffff