attempt to access beyond end of device
loop4: rw=1, want=29681, limit=112
audit: type=1800 audit(1542031498.887:345): pid=1312 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed comm="syz-executor4" name="file0" dev="loop4" ino=487 res=0
INFO: task syz-executor0:1288 blocked for more than 140 seconds.
Not tainted 4.20.0-rc2+ #333
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor0 D24240 1288 25130 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2831 [inline]
__schedule+0x8cf/0x21d0 kernel/sched/core.c:3472
schedule+0xfe/0x460 kernel/sched/core.c:3516
__rwsem_down_write_failed_common+0xc9a/0x15e0 kernel/locking/rwsem-xadd.c:577
rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:606
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_nested+0xa9/0x130 kernel/locking/rwsem.c:195
inode_lock_nested include/linux/fs.h:792 [inline]
filename_create+0x1b2/0x5b0 fs/namei.c:3635
user_path_create fs/namei.c:3693 [inline]
do_mknodat+0x1c2/0x530 fs/namei.c:3755
__do_sys_mknod fs/namei.c:3795 [inline]
__se_sys_mknod fs/namei.c:3793 [inline]
__x64_sys_mknod+0x7b/0xb0 fs/namei.c:3793
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457569
Code: Bad RIP value.
RSP: 002b:00007fe932807c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000085
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457569
RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000020000440
RBP: 000000000072c040 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe9328086d4
R13: 00000000004c2a6e R14: 00000000004d4110 R15: 00000000ffffffff
INFO: task syz-executor0:1290 blocked for more than 140 seconds.
Not tainted 4.20.0-rc2+ #333
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor0 D25376 1290 25130 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2831 [inline]
__schedule+0x8cf/0x21d0 kernel/sched/core.c:3472
schedule+0xfe/0x460 kernel/sched/core.c:3516
__rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:280 [inline]
rwsem_down_read_failed+0x371/0x710 kernel/locking/rwsem-xadd.c:297
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+0x9b/0x120 kernel/locking/rwsem.c:26
inode_lock_shared include/linux/fs.h:767 [inline]
do_last fs/namei.c:3323 [inline]
path_openat+0x2444/0x5150 fs/namei.c:3534
do_filp_open+0x255/0x380 fs/namei.c:3564
do_sys_open+0x568/0x700 fs/open.c:1063
__do_sys_open fs/open.c:1081 [inline]
__se_sys_open fs/open.c:1076 [inline]
__x64_sys_open+0x7e/0xc0 fs/open.c:1076
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457569
Code: Bad RIP value.
RSP: 002b:00007fe9327e6c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457569
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000380
RBP: 000000000072c0e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe9327e76d4
R13: 00000000004f00bf R14: 00000000004d45c0 R15: 00000000ffffffff
Showing all locks held in the system:
3 locks held by kworker/u4:1/21:
#0: 000000000294feef ((wq_completion)"writeback"){+.+.}, at: __write_once_size include/linux/compiler.h:209 [inline]
#0: 000000000294feef ((wq_completion)"writeback"){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: 000000000294feef ((wq_completion)"writeback"){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline]
#0: 000000000294feef ((wq_completion)"writeback"){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:59 [inline]
#0: 000000000294feef ((wq_completion)"writeback"){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline]
#0: 000000000294feef ((wq_completion)"writeback"){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline]
#0: 000000000294feef ((wq_completion)"writeback"){+.+.}, at: process_one_work+0xb43/0x1c40 kernel/workqueue.c:2124
#1: 00000000fa15a100 ((work_completion)(&(&wb->dwork)->work)){+.+.}, at: process_one_work+0xb9a/0x1c40 kernel/workqueue.c:2128
#2: 00000000cfc20c1a (&type->s_umount_key#79){++++}, at: trylock_super+0x22/0x110 fs/super.c:412
1 lock held by khungtaskd/1008:
#0: 000000000255451a (rcu_read_lock){....}, at: debug_show_all_locks+0xd0/0x424 kernel/locking/lockdep.c:4379
3 locks held by kworker/1:2/3403:
1 lock held by rsyslogd/5931:
#0: 00000000dba11588 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1bb/0x200 fs/file.c:766
2 locks held by getty/6022:
#0: 000000001438973a (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
#1: 00000000d40704cd (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154
2 locks held by getty/6023:
#0: 00000000a32fa056 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
#1: 00000000f4ea205d (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154
2 locks held by getty/6024:
#0: 0000000045ba1c98 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
#1: 000000002393ee39 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154
2 locks held by getty/6025:
#0: 0000000067526897 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
#1: 00000000f7ca222c (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154
2 locks held by getty/6026:
#0: 000000003fcdad21 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
#1: 000000000abd7686 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154
2 locks held by getty/6027:
#0: 00000000ff9daf2e (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
#1: 00000000705116ba (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154
2 locks held by getty/6028:
#0: 00000000d5fc30f9 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
#1: 00000000b0bea660 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154
5 locks held by syz-executor0/1280:
1 lock held by syz-executor0/1288:
#0: 000000001f9738a6 (&sb->s_type->i_mutex_key#29/1){+.+.}, at: inode_lock_nested include/linux/fs.h:792 [inline]
#0: 000000001f9738a6 (&sb->s_type->i_mutex_key#29/1){+.+.}, at: filename_create+0x1b2/0x5b0 fs/namei.c:3635
1 lock held by syz-executor0/1290:
#0: 000000001f9738a6 (&sb->s_type->i_mutex_key#29){++++}, at: inode_lock_shared include/linux/fs.h:767 [inline]
#0: 000000001f9738a6 (&sb->s_type->i_mutex_key#29){++++}, at: do_last fs/namei.c:3323 [inline]
#0: 000000001f9738a6 (&sb->s_type->i_mutex_key#29){++++}, at: path_openat+0x2444/0x5150 fs/namei.c:3534
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 1008 Comm: khungtaskd Not tainted 4.20.0-rc2+ #333
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+0x244/0x39d lib/dump_stack.c:113
nmi_cpu_backtrace.cold.2+0x5c/0xa1 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x1e8/0x22a 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+0xb51/0x1060 kernel/hung_task.c:289
kthread+0x35a/0x440 kernel/kthread.c:246
ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
Sending NMI from CPU 0 to CPUs 1:
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 2.101 msecs
NMI backtrace for cpu 1
CPU: 1 PID: 1280 Comm: syz-executor0 Not tainted 4.20.0-rc2+ #333
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:lookup_chain_cache kernel/locking/lockdep.c:2244 [inline]
RIP: 0010:lookup_chain_cache_add kernel/locking/lockdep.c:2264 [inline]
RIP: 0010:validate_chain kernel/locking/lockdep.c:2318 [inline]
RIP: 0010:__lock_acquire+0xe95/0x4c20 kernel/locking/lockdep.c:3341
Code: 0f 85 31 3b 00 00 49 89 cc 48 89 9c 24 60 02 00 00 49 bd 00 00 00 00 00 fc ff df 49 c1 ec 03 4d 01 ec 48 85 db 41 c6 04 24 f8 <74> 5d 48 83 fb 08 74 57 48 8d 7b 10 48 89 f8 48 c1 e8 03 42 80 3c
RSP: 0018:ffff8881daf07900 EFLAGS: 00000086
RAX: dffffc0000000000 RBX: ffffffff8a5cc7e8 RCX: ffff8881daf07b60
RDX: 1ffff1103b5e0f6c RSI: 0000000000000000 RDI: ffffffff8a6ae278
RBP: ffff8881daf07c90 R08: ffff8881b896ced8 R09: 0000000000000008
R10: 000000000000370d R11: ffff8881b896c5c0 R12: ffffed103b5e0f6c
R13: dffffc0000000000 R14: 5f4d3cc1c84897af R15: ffff8881b896ceb8
FS: 00007fe93284a700(0000) GS:ffff8881daf00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000a40021 CR3: 00000001b83eb000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire+0x1ed/0x520 kernel/locking/lockdep.c:3844
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x99/0xd0 kernel/locking/spinlock.c:152
hrtimer_interrupt+0x38a/0x780 kernel/time/hrtimer.c:1549
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1034 [inline]
smp_apic_timer_interrupt+0x1a1/0x760 arch/x86/kernel/apic/apic.c:1059
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:804
RIP: 0010:find_get_entry+0x413/0x1120 mm/filemap.c:1422
Code: 84 06 05 00 00 e8 9d 4a e2 ff 4c 8b b5 78 fc ff ff 4d 85 f6 0f 84 72 09 00 00 e8 88 4a e2 ff 4c 89 f3 31 ff 83 e3 01 48 89 de a8 4b e2 ff 48 85 db 0f 85 5c 09 00 00 e8 6a 4a e2 ff 48 8b 85
RSP: 0018:ffff8881ce49e750 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000040000 RBX: 0000000000000000 RCX: ffffc90005a47000
RDX: 0000000000040000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff8881ce49eb08 R08: ffff8881b896c5c0 R09: ffffed103b5e5b67
R10: ffffed103b5e5b67 R11: ffff8881daf2db3b R12: ffff8881ce49eae0
R13: ffff8881ce49e818 R14: ffffea0006a2e3c0 R15: dffffc0000000000
pagecache_get_page+0x12f/0xf00 mm/filemap.c:1518
find_or_create_page include/linux/pagemap.h:322 [inline]
grow_dev_page fs/buffer.c:947 [inline]
grow_buffers fs/buffer.c:1016 [inline]
__getblk_slow fs/buffer.c:1043 [inline]
__getblk_gfp+0x3aa/0xd50 fs/buffer.c:1320
__bread_gfp+0x2d/0x310 fs/buffer.c:1354
sb_bread include/linux/buffer_head.h:307 [inline]
fat__get_entry+0x5a6/0xa40 fs/fat/dir.c:101
fat_get_entry fs/fat/dir.c:129 [inline]
fat_search_long+0x33b/0x1570 fs/fat/dir.c:479
vfat_find+0x16d/0x1a0 fs/fat/namei_vfat.c:697
vfat_lookup+0x107/0x640 fs/fat/namei_vfat.c:711
lookup_open+0x72e/0x1b90 fs/namei.c:3213
do_last fs/namei.c:3324 [inline]
path_openat+0x15e4/0x5150 fs/namei.c:3534
do_filp_open+0x255/0x380 fs/namei.c:3564
do_sys_open+0x568/0x700 fs/open.c:1063
ksys_open include/linux/syscalls.h:1279 [inline]
__do_sys_creat fs/open.c:1121 [inline]
__se_sys_creat fs/open.c:1119 [inline]
__x64_sys_creat+0x61/0x80 fs/open.c:1119
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457569
Code: fd b3 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 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fe932849c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 0000000000457569
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000180
RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe93284a6d4
R13: 00000000004bdb2f R14: 00000000004cc9e8 R15: 00000000ffffffff