kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
(ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 22432 Comm: syz-executor0 Not tainted 4.16.0-rc7+ #8
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__delayacct_blkio_end+0x4b/0xb0 kernel/delayacct.c:82
RSP: 0018:ffff8801db006ac8 EFLAGS: 00010002
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff81725ab1
RDX: 0000000000000007 RSI: 0000000000000004 RDI: 0000000000000038
RBP: ffff8801db006ae0 R08: 1ffff1003b600c9b R09: ffff8801bcbc6124
R10: 0000000000000001 R11: ffff8801db006b70 R12: ffff8801db006cb0
R13: ffff8801bcbc6878 R14: ffff8801bcbc60c0 R15: ffff8801bcbc654c
FS: 00007f3135074700(0000) GS:ffff8801db000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b9bc21000 CR3: 00000001c5e5f006 CR4: 00000000001606f0
DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
delayacct_blkio_end include/linux/delayacct.h:128 [inline]
try_to_wake_up+0xb7d/0x15f0 kernel/sched/core.c:2060
default_wake_function+0x30/0x50 kernel/sched/core.c:3693
autoremove_wake_function+0x78/0x350 kernel/sched/wait.c:377
wake_bit_function+0xbc/0x140 kernel/sched/wait_bit.c:33
__wake_up_common+0x18e/0x780 kernel/sched/wait.c:97
__wake_up_common_lock+0x1b4/0x310 kernel/sched/wait.c:125
__wake_up+0xe/0x10 kernel/sched/wait.c:149
__wake_up_bit+0x1a4/0x2a0 kernel/sched/wait_bit.c:124
wake_up_bit+0x3d/0x40 kernel/sched/wait_bit.c:147
journal_end_buffer_io_sync+0x82/0xc0 fs/jbd2/commit.c:44
end_bio_bh_io_sync+0xc5/0x110 fs/buffer.c:2992
bio_endio+0x447/0x950 block/bio.c:1775
req_bio_endio block/blk-core.c:208 [inline]
blk_update_request+0x265/0xda0 block/blk-core.c:2990
scsi_end_request+0xc8/0x820 drivers/scsi/scsi_lib.c:660
scsi_io_completion+0x8ab/0x16b0 drivers/scsi/scsi_lib.c:868
scsi_finish_command+0x5f6/0x890 drivers/scsi/scsi.c:248
scsi_softirq_done+0x3ab/0x480 drivers/scsi/scsi_lib.c:1653
__blk_mq_complete_request+0x564/0x990 block/blk-mq.c:559
blk_mq_complete_request+0x1f6/0x320 block/blk-mq.c:644
scsi_mq_done+0xd6/0x3c0 drivers/scsi/scsi_lib.c:1964
virtscsi_complete_cmd+0x489/0x6f0 drivers/scsi/virtio_scsi.c:207
virtscsi_vq_done+0xc1/0x150 drivers/scsi/virtio_scsi.c:223
virtscsi_req_done+0xa7/0xd0 drivers/scsi/virtio_scsi.c:238
vring_interrupt+0x109/0x150 drivers/virtio/virtio_ring.c:951
__handle_irq_event_percpu+0x1ad/0x9d0 kernel/irq/handle.c:147
handle_irq_event_percpu+0x98/0x1b0 kernel/irq/handle.c:187
handle_irq_event+0xa7/0x140 kernel/irq/handle.c:204
handle_edge_irq+0x1d5/0x7c0 kernel/irq/chip.c:793
generic_handle_irq_desc include/linux/irqdesc.h:159 [inline]
handle_irq+0x17a/0x300 arch/x86/kernel/irq_64.c:77
do_IRQ+0x78/0x190 arch/x86/kernel/irq.c:238
common_interrupt+0xf/0xf arch/x86/entry/entry_64.S:636
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:778 [inline]
RIP: 0010:kmem_cache_free+0xf2/0x2a0 mm/slab.c:3745
RSP: 0018:ffff880174e1e560 EFLAGS: 00000282 ORIG_RAX: ffffffffffffffda
RAX: 0000000000000007 RBX: ffff8801da5d6540 RCX: 0000000000000006
RDX: 0000000000000000 RSI: 1ffff10035ba81f5 RDI: 0000000000000282
RBP: ffff880174e1e580 R08: 1ffff1002e9c3c7a R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88016d4882a0
R13: 0000000000000282 R14: ffffffff81bf555c R15: ffff88016d4882e8
free_buffer_head+0xdc/0x180 fs/buffer.c:3387
try_to_free_buffers+0x2dc/0x590 fs/buffer.c:3302
jbd2_journal_try_to_free_buffers+0x398/0x4b0 fs/jbd2/transaction.c:2016
ext4_releasepage+0x1b6/0x510 fs/ext4/inode.c:3392
try_to_release_page+0x24b/0x380 mm/filemap.c:3326
block_invalidatepage+0x2d5/0x3e0 fs/buffer.c:1515
ext4_invalidatepage+0x147/0x4c0 fs/ext4/inode.c:3354
ext4_da_invalidatepage+0x186/0xe00 fs/ext4/inode.c:3199
do_invalidatepage mm/truncate.c:165 [inline]
truncate_cleanup_page+0x398/0x4b0 mm/truncate.c:187
truncate_inode_pages_range+0x771/0x1fe0 mm/truncate.c:367
truncate_inode_pages mm/truncate.c:478 [inline]
truncate_pagecache+0x66/0x90 mm/truncate.c:801
ext4_setattr+0x17d1/0x2550 fs/ext4/inode.c:5520
notify_change+0xa71/0x1030 fs/attr.c:313
do_truncate+0x18d/0x280 fs/open.c:63
handle_truncate fs/namei.c:2969 [inline]
do_last fs/namei.c:3388 [inline]
path_openat+0x27b8/0x3530 fs/namei.c:3519
do_filp_open+0x25b/0x3b0 fs/namei.c:3554
do_sys_open+0x502/0x6d0 fs/open.c:1059
SYSC_open fs/open.c:1077 [inline]
SyS_open fs/open.c:1072 [inline]
SYSC_creat fs/open.c:1117 [inline]
SyS_creat+0x27/0x30 fs/open.c:1115
do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x454e79
RSP: 002b:00007f3135073c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 00007f31350746d4 RCX: 0000000000454e79
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000040
RBP: 000000000072c0c8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000069 R14: 00000000006f2a78 R15: 0000000000000003
Code: ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 6f 48 8b 9b 70 12 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 38 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 04 3c 03 7e 40 f6 43 38 01 75 2b 4c 8d 63
RIP: __delayacct_blkio_end+0x4b/0xb0 kernel/delayacct.c:82 RSP: ffff8801db006ac8
======================================================
WARNING: possible circular locking dependency detected
4.16.0-rc7+ #8 Not tainted
------------------------------------------------------
syz-executor0/22432 is trying to acquire lock:
((console_sem).lock){-.-.}, at: [<00000000473f601f>] down_trylock+0x13/0x70 kernel/locking/semaphore.c:136
but task is already holding lock:
(&p->pi_lock){-.-.}, at: [<00000000f03de2e7>] try_to_wake_up+0xbc/0x15f0 kernel/sched/core.c:1989
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #1 (&p->pi_lock){-.-.}:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x96/0xc0 kernel/locking/spinlock.c:152
try_to_wake_up+0xbc/0x15f0 kernel/sched/core.c:1989
wake_up_process+0x10/0x20 kernel/sched/core.c:2152
__up.isra.0+0x1cc/0x2c0 kernel/locking/semaphore.c:262
up+0x13b/0x1d0 kernel/locking/semaphore.c:187
__up_console_sem+0xb2/0x1a0 kernel/printk/printk.c:242
console_unlock+0x5af/0xfb0 kernel/printk/printk.c:2417
do_con_write+0x106e/0x1f70 drivers/tty/vt/vt.c:2433
con_write+0x25/0xb0 drivers/tty/vt/vt.c:2782
process_output_block drivers/tty/n_tty.c:579 [inline]
n_tty_write+0x5ef/0xec0 drivers/tty/n_tty.c:2308
do_tty_write drivers/tty/tty_io.c:958 [inline]
tty_write+0x3fa/0x840 drivers/tty/tty_io.c:1042
__vfs_write+0xef/0x970 fs/read_write.c:480
vfs_write+0x189/0x510 fs/read_write.c:544
SYSC_write fs/read_write.c:589 [inline]
SyS_write+0xef/0x220 fs/read_write.c:581
do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287
entry_SYSCALL_64_after_hwframe+0x42/0xb7
-> #0 ((console_sem).lock){-.-.}:
lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3920
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x96/0xc0 kernel/locking/spinlock.c:152
down_trylock+0x13/0x70 kernel/locking/semaphore.c:136
__down_trylock_console_sem+0xa2/0x1e0 kernel/printk/printk.c:225
console_trylock+0x15/0x70 kernel/printk/printk.c:2229
console_trylock_spinning kernel/printk/printk.c:1643 [inline]
vprintk_emit+0x5b5/0xb90 kernel/printk/printk.c:1906
vprintk_default+0x28/0x30 kernel/printk/printk.c:1947
vprintk_func+0x57/0xc0 kernel/printk/printk_safe.c:379
printk+0xaa/0xca kernel/printk/printk.c:1980
kasan_die_handler+0x31/0x3f arch/x86/mm/kasan_init_64.c:247
notifier_call_chain+0x136/0x2c0 kernel/notifier.c:93
__atomic_notifier_call_chain kernel/notifier.c:183 [inline]
atomic_notifier_call_chain+0x77/0x140 kernel/notifier.c:193
notify_die+0x18c/0x280 kernel/notifier.c:549
do_general_protection+0x331/0x3e0 arch/x86/kernel/traps.c:558
general_protection+0x25/0x50 arch/x86/entry/entry_64.S:1150
__delayacct_blkio_end+0x4b/0xb0 kernel/delayacct.c:82
delayacct_blkio_end include/linux/delayacct.h:128 [inline]
try_to_wake_up+0xb7d/0x15f0 kernel/sched/core.c:2060
default_wake_function+0x30/0x50 kernel/sched/core.c:3693
autoremove_wake_function+0x78/0x350 kernel/sched/wait.c:377
wake_bit_function+0xbc/0x140 kernel/sched/wait_bit.c:33
__wake_up_common+0x18e/0x780 kernel/sched/wait.c:97
__wake_up_common_lock+0x1b4/0x310 kernel/sched/wait.c:125
__wake_up+0xe/0x10 kernel/sched/wait.c:149
__wake_up_bit+0x1a4/0x2a0 kernel/sched/wait_bit.c:124
wake_up_bit+0x3d/0x40 kernel/sched/wait_bit.c:147
journal_end_buffer_io_sync+0x82/0xc0 fs/jbd2/commit.c:44
end_bio_bh_io_sync+0xc5/0x110 fs/buffer.c:2992
bio_endio+0x447/0x950 block/bio.c:1775
req_bio_endio block/blk-core.c:208 [inline]
blk_update_request+0x265/0xda0 block/blk-core.c:2990
scsi_end_request+0xc8/0x820 drivers/scsi/scsi_lib.c:660
scsi_io_completion+0x8ab/0x16b0 drivers/scsi/scsi_lib.c:868
scsi_finish_command+0x5f6/0x890 drivers/scsi/scsi.c:248
scsi_softirq_done+0x3ab/0x480 drivers/scsi/scsi_lib.c:1653
__blk_mq_complete_request+0x564/0x990 block/blk-mq.c:559
blk_mq_complete_request+0x1f6/0x320 block/blk-mq.c:644
scsi_mq_done+0xd6/0x3c0 drivers/scsi/scsi_lib.c:1964
virtscsi_complete_cmd+0x489/0x6f0 drivers/scsi/virtio_scsi.c:207
virtscsi_vq_done+0xc1/0x150 drivers/scsi/virtio_scsi.c:223
virtscsi_req_done+0xa7/0xd0 drivers/scsi/virtio_scsi.c:238
vring_interrupt+0x109/0x150 drivers/virtio/virtio_ring.c:951
__handle_irq_event_percpu+0x1ad/0x9d0 kernel/irq/handle.c:147
handle_irq_event_percpu+0x98/0x1b0 kernel/irq/handle.c:187
handle_irq_event+0xa7/0x140 kernel/irq/handle.c:204
handle_edge_irq+0x1d5/0x7c0 kernel/irq/chip.c:793
generic_handle_irq_desc include/linux/irqdesc.h:159 [inline]
handle_irq+0x17a/0x300 arch/x86/kernel/irq_64.c:77
do_IRQ+0x78/0x190 arch/x86/kernel/irq.c:238
ret_from_intr+0x0/0x1e
arch_local_irq_restore arch/x86/include/asm/paravirt.h:778 [inline]
kmem_cache_free+0xf2/0x2a0 mm/slab.c:3745
free_buffer_head+0xdc/0x180 fs/buffer.c:3387
try_to_free_buffers+0x2dc/0x590 fs/buffer.c:3302
jbd2_journal_try_to_free_buffers+0x398/0x4b0 fs/jbd2/transaction.c:2016
ext4_releasepage+0x1b6/0x510 fs/ext4/inode.c:3392
try_to_release_page+0x24b/0x380 mm/filemap.c:3326
block_invalidatepage+0x2d5/0x3e0 fs/buffer.c:1515
ext4_invalidatepage+0x147/0x4c0 fs/ext4/inode.c:3354
ext4_da_invalidatepage+0x186/0xe00 fs/ext4/inode.c:3199
do_invalidatepage mm/truncate.c:165 [inline]
truncate_cleanup_page+0x398/0x4b0 mm/truncate.c:187
truncate_inode_pages_range+0x771/0x1fe0 mm/truncate.c:367
truncate_inode_pages mm/truncate.c:478 [inline]
truncate_pagecache+0x66/0x90 mm/truncate.c:801
ext4_setattr+0x17d1/0x2550 fs/ext4/inode.c:5520
notify_change+0xa71/0x1030 fs/attr.c:313
do_truncate+0x18d/0x280 fs/open.c:63
handle_truncate fs/namei.c:2969 [inline]
do_last fs/namei.c:3388 [inline]
path_openat+0x27b8/0x3530 fs/namei.c:3519
do_filp_open+0x25b/0x3b0 fs/namei.c:3554
do_sys_open+0x502/0x6d0 fs/open.c:1059
SYSC_open fs/open.c:1077 [inline]
SyS_open fs/open.c:1072 [inline]
SYSC_creat fs/open.c:1117 [inline]
SyS_creat+0x27/0x30 fs/open.c:1115
do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287
entry_SYSCALL_64_after_hwframe+0x42/0xb7
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&p->pi_lock);
lock((console_sem).lock);
lock(&p->pi_lock);
lock((console_sem).lock);
*** DEADLOCK ***
8 locks held by syz-executor0/22432:
#0: (sb_writers#4){.+.+}, at: [<000000006965bd9b>] sb_start_write include/linux/fs.h:1548 [inline]
#0: (sb_writers#4){.+.+}, at: [<000000006965bd9b>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386
#1: (&sb->s_type->i_mutex_key#10){++++}, at: [<00000000ff6312c6>] inode_lock include/linux/fs.h:713 [inline]
#1: (&sb->s_type->i_mutex_key#10){++++}, at: [<00000000ff6312c6>] do_truncate+0x180/0x280 fs/open.c:61
#2: (&ei->i_mmap_sem){++++}, at: [<00000000f4148d97>] ext4_setattr+0x17a6/0x2550 fs/ext4/inode.c:5515
#3: (&(&virtscsi_vq->vq_lock)->rlock){-.-.}, at: [<00000000706fe798>] virtscsi_vq_done+0x9d/0x150 drivers/scsi/virtio_scsi.c:219
#4: (rcu_read_lock){....}, at: [<00000000c479e1f8>] hctx_lock+0xd8/0x190 block/blk-mq.c:578
#5: (bit_wait_table + i){-.-.}, at: [<0000000088f43f13>] __wake_up_common_lock+0x190/0x310 kernel/sched/wait.c:124
#6: (&p->pi_lock){-.-.}, at: [<00000000f03de2e7>] try_to_wake_up+0xbc/0x15f0 kernel/sched/core.c:1989
#7: (rcu_read_lock){....}, at: [<000000005b26b127>] rcu_read_unlock include/linux/rcupdate.h:682 [inline]
#7: (rcu_read_lock){....}, at: [<000000005b26b127>] atomic_notifier_call_chain+0x0/0x140 kernel/notifier.c:184
stack backtrace:
CPU: 0 PID: 22432 Comm: syz-executor0 Not tainted 4.16.0-rc7+ #8
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x194/0x24d lib/dump_stack.c:53
print_circular_bug.isra.38+0x2cd/0x2dc kernel/locking/lockdep.c:1223
check_prev_add kernel/locking/lockdep.c:1863 [inline]
check_prevs_add kernel/locking/lockdep.c:1976 [inline]
validate_chain kernel/locking/lockdep.c:2417 [inline]
__lock_acquire+0x30a8/0x3e00 kernel/locking/lockdep.c:3431
lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3920
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x96/0xc0 kernel/locking/spinlock.c:152
down_trylock+0x13/0x70 kernel/locking/semaphore.c:136
__down_trylock_console_sem+0xa2/0x1e0 kernel/printk/printk.c:225
console_trylock+0x15/0x70 kernel/printk/printk.c:2229
console_trylock_spinning kernel/printk/printk.c:1643 [inline]
vprintk_emit+0x5b5/0xb90 kernel/printk/printk.c:1906
vprintk_default+0x28/0x30 kernel/printk/printk.c:1947
vprintk_func+0x57/0xc0 kernel/printk/printk_safe.c:379
printk+0xaa/0xca kernel/printk/printk.c:1980
kasan_die_handler+0x31/0x3f arch/x86/mm/kasan_init_64.c:247
notifier_call_chain+0x136/0x2c0 kernel/notifier.c:93
__atomic_notifier_call_chain kernel/notifier.c:183 [inline]
atomic_notifier_call_chain+0x77/0x140 kernel/notifier.c:193
notify_die+0x18c/0x280 kernel/notifier.c:549
do_general_protection+0x331/0x3e0 arch/x86/kernel/traps.c:558
general_protection+0x25/0x50 arch/x86/entry/entry_64.S:1150
RIP: 0010:__delayacct_blkio_end+0x4b/0xb0 kernel/delayacct.c:82
RSP: 0018:ffff8801db006ac8 EFLAGS: 00010002
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff81725ab1
RDX: 0000000000000007 RSI: 0000000000000004 RDI: 0000000000000038
RBP: ffff8801db006ae0 R08: 1ffff1003b600c9b R09: ffff8801bcbc6124
R10: 0000000000000001 R11: ffff8801db006b70 R12: ffff8801db006cb0
R13: ffff8801bcbc6878 R14: ffff8801bcbc60c0 R15: ffff8801bcbc654c
delayacct_blkio_end include/linux/delayacct.h:128 [inline]
try_to_wake_up+0xb7d/0x15f0 kernel/sched/core.c:2060
default_wake_function+0x30/0x50 kernel/sched/core.c:3693
autoremove_wake_function+0x78/0x350 kernel/sched/wait.c:377
wake_bit_function+0xbc/0x140 kernel/sched/wait_bit.c:33
__wake_up_common+0x18e/0x780 kernel/sched/wait.c:97
? common
Lost 217 message(s)!
---[ end trace 915c41efdbc74ba2 ]---