============================= WARNING: suspicious RCU usage 4.17.0-rc2+ #24 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-executor5/9619: #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: 0 PID: 9619 Comm: syz-executor5 Not tainted 4.17.0-rc2+ #24 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:debug_lockdep_rcu_enabled+0x37/0x90 kernel/rcu/update.c:300 RSP: 0018:ffff88019a137710 EFLAGS: 00000246 ORIG_RAX: ffffffffffffffd9 RAX: 0000000000000003 RBX: 1ffff10033426ee6 RCX: 1ffff100369450f2 RDX: 0000000000000002 RSI: ffffffff8218899d RDI: ffffffff897bd780 RBP: ffff88019a137710 R08: ffff8801bc2a4100 R09: ffffed003b5c46c2 R10: ffffed003b5c46c2 R11: ffff8801dae23613 R12: ffff8801aaf0cd20 R13: ffff8801b4a48101 R14: ffff8801b4a481c0 R15: ffff8801b4a28790 rcu_read_unlock include/linux/rcupdate.h:684 [inline] jbd2_write_access_granted.part.8+0x232/0x420 fs/jbd2/transaction.c:1066 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:00007ffd12a42888 EFLAGS: 00000206 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004556c7 RDX: 0000000001c649f3 RSI: 00007ffd12a42920 RDI: 00007ffd12a42920 RBP: 00007ffd12a44630 R08: 0000000000000000 R09: 000000000000000f R10: 000000000000000a R11: 0000000000000206 R12: 0000000001c64940 R13: 0000000000000000 R14: 0000000000000048 R15: 0000000000020204 BUG: sleeping function called from invalid context at mm/slab.h:421 in_atomic(): 1, irqs_disabled(): 1, pid: 9619, name: syz-executor5 5 locks held by syz-executor5/9619: #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: 120404 hardirqs last enabled at (120403): [] lookup_bh_lru fs/buffer.c:1271 [inline] hardirqs last enabled at (120403): [] __find_get_block+0x2b8/0xe50 fs/buffer.c:1283 hardirqs last disabled at (120404): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (120236): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:311 softirqs last disabled at (120217): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (120217): [] irq_exit+0x1d1/0x200 kernel/softirq.c:405 CPU: 0 PID: 9619 Comm: syz-executor5 Not tainted 4.17.0-rc2+ #24 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:debug_lockdep_rcu_enabled+0x37/0x90 kernel/rcu/update.c:300 RSP: 0018:ffff88019a137710 EFLAGS: 00000246 ORIG_RAX: ffffffffffffffd9 RAX: 0000000000000003 RBX: 1ffff10033426ee6 RCX: 1ffff100369450f2 RDX: 0000000000000002 RSI: ffffffff8218899d RDI: ffffffff897bd780 RBP: ffff88019a137710 R08: ffff8801bc2a4100 R09: ffffed003b5c46c2 R10: ffffed003b5c46c2 R11: ffff8801dae23613 R12: ffff8801aaf0cd20 R13: ffff8801b4a48101 R14: ffff8801b4a481c0 R15: ffff8801b4a28790 rcu_read_unlock include/linux/rcupdate.h:684 [inline] jbd2_write_access_granted.part.8+0x232/0x420 fs/jbd2/transaction.c:1066 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:00007ffd12a42888 EFLAGS: 00000206 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004556c7 RDX: 0000000001c649f3 RSI: 00007ffd12a42920 RDI: 00007ffd12a42920 RBP: 00007ffd12a44630 R08: 0000000000000000 R09: 000000000000000f R10: 000000000000000a R11: 0000000000000206 R12: 0000000001c64940 R13: 0000000000000000 R14: 0000000000000048 R15: 0000000000020204 random: crng init done tmpfs: No value for mount option 'eX^xyCmq٨ ' tmpfs: No value for mount option 'eX^xyCmq٨ ' tmpfs: No value for mount option 'eX^xyCmq٨ ' tmpfs: No value for mount option 'eX^xyCmq٨ ' overlayfs: unrecognized mount option "#+F;4&`ert0{M܎ 텃гo͛׍?Zgs}CS\dʝg0iR\CDQV mx>RrF!{$UfY{˫w7Kvx Yz