=============================
WARNING: suspicious RCU usage
4.17.0-rc2+ #15 Not tainted
-----------------------------
include/linux/rcupdate.h:304 Illegal context switch in RCU read-side critical section!
other info that might help us debug this:
rcu_scheduler_active = 2, debug_locks = 1
5 locks held by syz-executor2/4540:
#0: (ptrval) (sb_writers#4){.+.+}, at: sb_start_write include/linux/fs.h:1550 [inline]
#0: (ptrval) (sb_writers#4){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:386
#1: (ptrval) (&type->i_mutex_dir_key/1){+.+.}, at: inode_lock_nested include/linux/fs.h:748 [inline]
#1: (ptrval) (&type->i_mutex_dir_key/1){+.+.}, at: do_unlinkat+0x3c4/0xa10 fs/namei.c:4019
#2: (ptrval) (&sb->s_type->i_mutex_key#10){+.+.}, at: inode_lock include/linux/fs.h:713 [inline]
#2: (ptrval) (&sb->s_type->i_mutex_key#10){+.+.}, at: vfs_unlink+0xd1/0x510 fs/namei.c:3961
#3: (ptrval) (jbd2_handle){++++}, at: start_this_handle+0x581/0x1250 fs/jbd2/transaction.c:385
#4: (ptrval) (rcu_read_lock){....}, at: __list_add include/linux/list.h:64 [inline]
#4: (ptrval) (rcu_read_lock){....}, at: list_add include/linux/list.h:79 [inline]
#4: (ptrval) (rcu_read_lock){....}, at: jbd2_write_access_granted.part.8+0x0/0x420 fs/jbd2/transaction.c:2544
stack backtrace:
CPU: 1 PID: 4540 Comm: syz-executor2 Not tainted 4.17.0-rc2+ #15
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+0x1b9/0x294 lib/dump_stack.c:113
lockdep_rcu_suspicious+0x14a/0x153 kernel/locking/lockdep.c:4592
rcu_preempt_sleep_check include/linux/rcupdate.h:303 [inline]
___might_sleep+0x26d/0x320 kernel/sched/core.c:6153
__might_sleep+0x95/0x190 kernel/sched/core.c:6141
slab_pre_alloc_hook mm/slab.h:421 [inline]
slab_alloc mm/slab.c:3378 [inline]
__do_kmalloc mm/slab.c:3716 [inline]
__kmalloc+0x2b9/0x760 mm/slab.c:3727
kmalloc_array include/linux/slab.h:631 [inline]
kcalloc include/linux/slab.h:642 [inline]
numa_crng_init drivers/char/random.c:798 [inline]
crng_reseed+0x427/0x920 drivers/char/random.c:923
credit_entropy_bits+0x98d/0xa30 drivers/char/random.c:708
add_interrupt_randomness+0x494/0x860 drivers/char/random.c:1254
handle_irq_event_percpu+0xf9/0x1c0 kernel/irq/handle.c:191
handle_irq_event+0xa7/0x135 kernel/irq/handle.c:206
handle_edge_irq+0x20f/0x870 kernel/irq/chip.c:791
generic_handle_irq_desc include/linux/irqdesc.h:159 [inline]
handle_irq+0x18c/0x2e7 arch/x86/kernel/irq_64.c:77
do_IRQ+0x78/0x190 arch/x86/kernel/irq.c:245
common_interrupt+0xf/0xf arch/x86/entry/entry_64.S:642
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:783 [inline]
RIP: 0010:lock_acquire+0x257/0x520 kernel/locking/lockdep.c:3923
RSP: 0018:ffff88019feaf618 EFLAGS: 00000286 ORIG_RAX: ffffffffffffffd5
RAX: dffffc0000000000 RBX: 1ffff10033fd5ec8 RCX: 0000000000000000
RDX: 1ffffffff11a315d RSI: ffff88019fea2df8 RDI: 0000000000000286
RBP: ffff88019feaf708 R08: 0000000000000008 R09: 0000000000000004
R10: ffff88019fea2e98 R11: ffff88019fea25c0 R12: ffff88019fea25c0
R13: 0000000000000002 R14: 0000000000000000 R15: 0000000000000000
rcu_lock_acquire include/linux/rcupdate.h:246 [inline]
rcu_read_lock include/linux/rcupdate.h:632 [inline]
jbd2_write_access_granted.part.8+0x9a/0x420 fs/jbd2/transaction.c:1039
jbd2_write_access_granted fs/jbd2/transaction.c:1096 [inline]
jbd2_journal_get_write_access+0x91/0xc0 fs/jbd2/transaction.c:1086
__ext4_journal_get_write_access+0x5e/0xa0 fs/ext4/ext4_jbd2.c:169
ext4_reserve_inode_write+0x191/0x260 fs/ext4/inode.c:5763
ext4_mark_inode_dirty+0x177/0xb20 fs/ext4/inode.c:5912
ext4_unlink+0x771/0x11e0 fs/ext4/namei.c:3038
vfs_unlink+0x2db/0x510 fs/namei.c:3970
do_unlinkat+0x6b8/0xa10 fs/namei.c:4033
__do_sys_unlink fs/namei.c:4080 [inline]
__se_sys_unlink fs/namei.c:4078 [inline]
__x64_sys_unlink+0x42/0x50 fs/namei.c:4078
do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4556c7
RSP: 002b:00007ffc91294e48 EFLAGS: 00000206 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004556c7
RDX: 0000000000be39bb RSI: 00007ffc91294ee0 RDI: 00007ffc91294ee0
RBP: 00007ffc91296bf0 R08: 0000000000000000 R09: 000000000000000c
R10: 0000000000000006 R11: 0000000000000206 R12: 0000000000be3940
R13: 0000000000000000 R14: 00000000000001f4 R15: 000000000001eb5c
BUG: sleeping function called from invalid context at mm/slab.h:421
in_atomic(): 1, irqs_disabled(): 1, pid: 4540, name: syz-executor2
5 locks held by syz-executor2/4540:
#0: (ptrval) (sb_writers#4){.+.+}, at: sb_start_write include/linux/fs.h:1550 [inline]
#0: (ptrval) (sb_writers#4){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:386
#1: (ptrval) (&type->i_mutex_dir_key/1){+.+.}, at: inode_lock_nested include/linux/fs.h:748 [inline]
#1: (ptrval) (&type->i_mutex_dir_key/1){+.+.}, at: do_unlinkat+0x3c4/0xa10 fs/namei.c:4019
#2: (ptrval) (&sb->s_type->i_mutex_key#10){+.+.}, at: inode_lock include/linux/fs.h:713 [inline]
#2: (ptrval) (&sb->s_type->i_mutex_key#10){+.+.}, at: vfs_unlink+0xd1/0x510 fs/namei.c:3961
#3: (ptrval) (jbd2_handle){++++}, at: start_this_handle+0x581/0x1250 fs/jbd2/transaction.c:385
#4: (ptrval) (rcu_read_lock){....}, at: __list_add include/linux/list.h:64 [inline]
#4: (ptrval) (rcu_read_lock){....}, at: list_add include/linux/list.h:79 [inline]
#4: (ptrval) (rcu_read_lock){....}, at: jbd2_write_access_granted.part.8+0x0/0x420 fs/jbd2/transaction.c:2544
irq event stamp: 959330
hardirqs last enabled at (959329): [] lookup_bh_lru fs/buffer.c:1271 [inline]
hardirqs last enabled at (959329): [] __find_get_block+0x2b8/0xe50 fs/buffer.c:1283
hardirqs last disabled at (959330): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625
softirqs last enabled at (958354): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311
softirqs last disabled at (958257): [] invoke_softirq kernel/softirq.c:365 [inline]
softirqs last disabled at (958257): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405
CPU: 1 PID: 4540 Comm: syz-executor2 Not tainted 4.17.0-rc2+ #15
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+0x1b9/0x294 lib/dump_stack.c:113
___might_sleep.cold.87+0x11f/0x13a kernel/sched/core.c:6188
__might_sleep+0x95/0x190 kernel/sched/core.c:6141
slab_pre_alloc_hook mm/slab.h:421 [inline]
slab_alloc mm/slab.c:3378 [inline]
__do_kmalloc mm/slab.c:3716 [inline]
__kmalloc+0x2b9/0x760 mm/slab.c:3727
kmalloc_array include/linux/slab.h:631 [inline]
kcalloc include/linux/slab.h:642 [inline]
numa_crng_init drivers/char/random.c:798 [inline]
crng_reseed+0x427/0x920 drivers/char/random.c:923
credit_entropy_bits+0x98d/0xa30 drivers/char/random.c:708
add_interrupt_randomness+0x494/0x860 drivers/char/random.c:1254
handle_irq_event_percpu+0xf9/0x1c0 kernel/irq/handle.c:191
handle_irq_event+0xa7/0x135 kernel/irq/handle.c:206
handle_edge_irq+0x20f/0x870 kernel/irq/chip.c:791
generic_handle_irq_desc include/linux/irqdesc.h:159 [inline]
handle_irq+0x18c/0x2e7 arch/x86/kernel/irq_64.c:77
do_IRQ+0x78/0x190 arch/x86/kernel/irq.c:245
common_interrupt+0xf/0xf arch/x86/entry/entry_64.S:642
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:783 [inline]
RIP: 0010:lock_acquire+0x257/0x520 kernel/locking/lockdep.c:3923
RSP: 0018:ffff88019feaf618 EFLAGS: 00000286 ORIG_RAX: ffffffffffffffd5
RAX: dffffc0000000000 RBX: 1ffff10033fd5ec8 RCX: 0000000000000000
RDX: 1ffffffff11a315d RSI: ffff88019fea2df8 RDI: 0000000000000286
RBP: ffff88019feaf708 R08: 0000000000000008 R09: 0000000000000004
R10: ffff88019fea2e98 R11: ffff88019fea25c0 R12: ffff88019fea25c0
R13: 0000000000000002 R14: 0000000000000000 R15: 0000000000000000
rcu_lock_acquire include/linux/rcupdate.h:246 [inline]
rcu_read_lock include/linux/rcupdate.h:632 [inline]
jbd2_write_access_granted.part.8+0x9a/0x420 fs/jbd2/transaction.c:1039
jbd2_write_access_granted fs/jbd2/transaction.c:1096 [inline]
jbd2_journal_get_write_access+0x91/0xc0 fs/jbd2/transaction.c:1086
__ext4_journal_get_write_access+0x5e/0xa0 fs/ext4/ext4_jbd2.c:169
ext4_reserve_inode_write+0x191/0x260 fs/ext4/inode.c:5763
ext4_mark_inode_dirty+0x177/0xb20 fs/ext4/inode.c:5912
ext4_unlink+0x771/0x11e0 fs/ext4/namei.c:3038
vfs_unlink+0x2db/0x510 fs/namei.c:3970
do_unlinkat+0x6b8/0xa10 fs/namei.c:4033
__do_sys_unlink fs/namei.c:4080 [inline]
__se_sys_unlink fs/namei.c:4078 [inline]
__x64_sys_unlink+0x42/0x50 fs/namei.c:4078
do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4556c7
RSP: 002b:00007ffc91294e48 EFLAGS: 00000206 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004556c7
RDX: 0000000000be39bb RSI: 00007ffc91294ee0 RDI: 00007ffc91294ee0
RBP: 00007ffc91296bf0 R08: 0000000000000000 R09: 000000000000000c
R10: 0000000000000006 R11: 0000000000000206 R12: 0000000000be3940
R13: 0000000000000000 R14: 00000000000001f4 R15: 000000000001eb5c
random: crng init done
proc: unrecognized mount option "PtCxUE .'ۘ-F%10P " or missing value
proc: unrecognized mount option "PtCxUE .'ۘ-F%10P " or missing value
tmpfs: Bad mount option 4`i*lS ljyGn&s~b@34?p>˵dTptTٺ:p`_P'w# abm./;1xP7
tmpfs: Bad mount option 4`i*lS ljyGn&s~b@34?p>˵dTptTٺ:p`_P'w# abm./;1xP7
EXT4-fs (sda1): Unrecognized mount option "" or missing value
EXT4-fs (sda1): Unrecognized mount option "" or missing value
9pnet_virtio: no channels available for device ./file0