QAT: Invalid ioctl ====================================================== WARNING: possible circular locking dependency detected 4.15.0-rc2-mm1+ #39 Not tainted ------------------------------------------------------ syz-executor3/3681 is trying to acquire lock: (&tty->ldisc_sem){++++}, at: [<00000000005e4fda>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 but task is already holding lock: (&pipe->mutex/1){+.+.}, at: [<000000009b998ba0>] pipe_lock_nested fs/pipe.c:67 [inline] (&pipe->mutex/1){+.+.}, at: [<000000009b998ba0>] pipe_lock+0x56/0x70 fs/pipe.c:75 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #6 (&pipe->mutex/1){+.+.}: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4004 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0x16f/0x1a80 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 pipe_lock_nested fs/pipe.c:67 [inline] pipe_lock+0x56/0x70 fs/pipe.c:75 iter_file_splice_write+0x264/0xf30 fs/splice.c:699 do_splice_from fs/splice.c:851 [inline] do_splice fs/splice.c:1147 [inline] SYSC_splice fs/splice.c:1402 [inline] SyS_splice+0x7d5/0x1630 fs/splice.c:1382 entry_SYSCALL_64_fastpath+0x1f/0x96 -> #5 (sb_writers){.+.+}: context_switch kernel/sched/core.c:2803 [inline] __schedule+0x8f3/0x2060 kernel/sched/core.c:3376 schedule+0xf5/0x430 kernel/sched/core.c:3435 devtmpfsd+0x420/0x4b0 drivers/base/devtmpfs.c:408 kthread+0x37a/0x440 kernel/kthread.c:238 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:524 -> #4 ((completion)&req.done){+.+.}: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4004 complete_acquire include/linux/completion.h:40 [inline] __wait_for_common kernel/sched/completion.c:109 [inline] wait_for_common kernel/sched/completion.c:123 [inline] wait_for_completion+0xcb/0x7b0 kernel/sched/completion.c:144 devtmpfs_create_node+0x32b/0x4a0 drivers/base/devtmpfs.c:115 device_add+0x120f/0x1640 drivers/base/core.c:1824 device_register+0x1d/0x20 drivers/base/core.c:1905 tty_register_device_attr+0x422/0x740 drivers/tty/tty_io.c:2956 tty_port_register_device_attr_serdev+0x100/0x140 drivers/tty/tty_port.c:166 uart_add_one_port+0xa7a/0x15a0 drivers/tty/serial/serial_core.c:2783 serial8250_register_8250_port+0xfac/0x1990 drivers/tty/serial/8250/8250_core.c:1045 serial_pnp_probe+0x5e7/0xac0 drivers/tty/serial/8250/8250_pnp.c:480 pnp_device_probe+0x15f/0x250 drivers/pnp/driver.c:109 really_probe drivers/base/dd.c:424 [inline] driver_probe_device+0x71b/0xae0 drivers/base/dd.c:566 __driver_attach+0x181/0x1c0 drivers/base/dd.c:800 bus_for_each_dev+0x154/0x1e0 drivers/base/bus.c:313 driver_attach+0x3d/0x50 drivers/base/dd.c:819 bus_add_driver+0x466/0x620 drivers/base/bus.c:669 driver_register+0x1bf/0x3c0 drivers/base/driver.c:168 pnp_register_driver+0x75/0xa0 drivers/pnp/driver.c:272 serial8250_pnp_init+0x15/0x20 drivers/tty/serial/8250/8250_pnp.c:537 serial8250_init+0x8f/0x270 drivers/tty/serial/8250/8250_core.c:1122 do_one_initcall+0x9e/0x330 init/main.c:833 do_initcall_level init/main.c:899 [inline] do_initcalls init/main.c:907 [inline] do_basic_setup init/main.c:925 [inline] kernel_init_freeable+0x469/0x521 init/main.c:1073 kernel_init+0x13/0x172 init/main.c:1000 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:524 -> #3 (&port->mutex){+.+.}: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4004 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0x16f/0x1a80 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 uart_set_termios+0x8f/0x5b0 drivers/tty/serial/serial_core.c:1416 tty_set_termios+0x6d4/0xa40 drivers/tty/tty_ioctl.c:334 set_termios+0x377/0x6b0 drivers/tty/tty_ioctl.c:414 tty_mode_ioctl+0x9fb/0xb10 drivers/tty/tty_ioctl.c:749 n_tty_ioctl_helper+0x40/0x360 drivers/tty/tty_ioctl.c:940 n_tty_ioctl+0x148/0x2d0 drivers/tty/n_tty.c:2435 tty_ioctl+0x32e/0x1600 drivers/tty/tty_io.c:2638 vfs_ioctl fs/ioctl.c:46 [inline] do_vfs_ioctl+0x1b1/0x1530 fs/ioctl.c:686 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692 entry_SYSCALL_64_fastpath+0x1f/0x96 -> #2 (&tty->termios_rwsem){++++}: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4004 down_write+0x87/0x120 kernel/locking/rwsem.c:70 n_tty_flush_buffer+0x21/0x320 drivers/tty/n_tty.c:357 tty_buffer_flush+0x29a/0x390 drivers/tty/tty_buffer.c:233 tty_ldisc_flush+0x25/0x70 drivers/tty/tty_ldisc.c:418 tty_port_close_start.part.4+0x1cd/0x4e0 drivers/tty/tty_port.c:603 tty_port_close_start drivers/tty/tty_port.c:646 [inline] tty_port_close+0x3f/0x80 drivers/tty/tty_port.c:640 uart_close+0x77/0x1d0 drivers/tty/serial/serial_core.c:1487 tty_release+0x446/0x14c0 drivers/tty/tty_io.c:1639 __fput+0x333/0x7f0 fs/file_table.c:210 ____fput+0x15/0x20 fs/file_table.c:244 task_work_run+0x199/0x270 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x275/0x2f0 arch/x86/entry/common.c:165 prepare_exit_to_usermode arch/x86/entry/common.c:195 [inline] syscall_return_slowpath+0x490/0x550 arch/x86/entry/common.c:264 entry_SYSCALL_64_fastpath+0x94/0x96 -> #1 (&buf->lock){+.+.}: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4004 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0x16f/0x1a80 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 tty_buffer_flush+0xbd/0x390 drivers/tty/tty_buffer.c:222 tty_ldisc_flush+0x25/0x70 drivers/tty/tty_ldisc.c:418 tty_port_close_start.part.4+0x1cd/0x4e0 drivers/tty/tty_port.c:603 tty_port_close_start drivers/tty/tty_port.c:646 [inline] tty_port_close+0x3f/0x80 drivers/tty/tty_port.c:640 uart_close+0x77/0x1d0 drivers/tty/serial/serial_core.c:1487 tty_release+0x446/0x14c0 drivers/tty/tty_io.c:1639 __fput+0x333/0x7f0 fs/file_table.c:210 ____fput+0x15/0x20 fs/file_table.c:244 task_work_run+0x199/0x270 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x275/0x2f0 arch/x86/entry/common.c:165 prepare_exit_to_usermode arch/x86/entry/common.c:195 [inline] syscall_return_slowpath+0x490/0x550 arch/x86/entry/common.c:264 entry_SYSCALL_64_fastpath+0x94/0x96 -> #0 (&tty->ldisc_sem){++++}: check_prevs_add kernel/locking/lockdep.c:2031 [inline] validate_chain kernel/locking/lockdep.c:2473 [inline] __lock_acquire+0x3498/0x47f0 kernel/locking/lockdep.c:3500 lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4004 __ldsem_down_read_nested+0xd1/0xa90 drivers/tty/tty_ldsem.c:325 ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 tty_ldisc_ref_wait+0x25/0x80 drivers/tty/tty_ldisc.c:277 tty_read+0xf8/0x250 drivers/tty/tty_io.c:852 do_loop_readv_writev fs/read_write.c:673 [inline] do_iter_read+0x3db/0x5b0 fs/read_write.c:897 vfs_readv+0x121/0x1c0 fs/read_write.c:959 kernel_readv fs/splice.c:361 [inline] default_file_splice_read+0x508/0xae0 fs/splice.c:416 do_splice_to+0x110/0x170 fs/splice.c:880 do_splice fs/splice.c:1173 [inline] SYSC_splice fs/splice.c:1402 [inline] SyS_splice+0x11a8/0x1630 fs/splice.c:1382 entry_SYSCALL_64_fastpath+0x1f/0x96 other info that might help us debug this: Chain exists of: &tty->ldisc_sem --> sb_writers --> &pipe->mutex/1 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&pipe->mutex/1); lock(sb_writers); lock(&pipe->mutex/1); lock(&tty->ldisc_sem); *** DEADLOCK *** 1 lock held by syz-executor3/3681: #0: (&pipe->mutex/1){+.+.}, at: [<000000009b998ba0>] pipe_lock_nested fs/pipe.c:67 [inline] #0: (&pipe->mutex/1){+.+.}, at: [<000000009b998ba0>] pipe_lock+0x56/0x70 fs/pipe.c:75 stack backtrace: CPU: 1 PID: 3681 Comm: syz-executor3 Not tainted 4.15.0-rc2-mm1+ #39 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+0x194/0x257 lib/dump_stack.c:53 print_circular_bug+0x42d/0x610 kernel/locking/lockdep.c:1271 check_prev_add+0x666/0x15f0 kernel/locking/lockdep.c:1914 check_prevs_add kernel/locking/lockdep.c:2031 [inline] validate_chain kernel/locking/lockdep.c:2473 [inline] __lock_acquire+0x3498/0x47f0 kernel/locking/lockdep.c:3500 lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4004 __ldsem_down_read_nested+0xd1/0xa90 drivers/tty/tty_ldsem.c:325 ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 tty_ldisc_ref_wait+0x25/0x80 drivers/tty/tty_ldisc.c:277 tty_read+0xf8/0x250 drivers/tty/tty_io.c:852 do_loop_readv_writev fs/read_write.c:673 [inline] do_iter_read+0x3db/0x5b0 fs/read_write.c:897 vfs_readv+0x121/0x1c0 fs/read_write.c:959 kernel_readv fs/splice.c:361 [inline] default_file_splice_read+0x508/0xae0 fs/splice.c:416 do_splice_to+0x110/0x170 fs/splice.c:880 do_splice fs/splice.c:1173 [inline] SYSC_splice fs/splice.c:1402 [inline] SyS_splice+0x11a8/0x1630 fs/splice.c:1382 entry_SYSCALL_64_fastpath+0x1f/0x96 RIP: 0033:0x452a39 RSP: 002b:00007fd3c3f1bc58 EFLAGS: 00000212 ORIG_RAX: 0000000000000113 RAX: ffffffffffffffda RBX: 00000000007580d8 RCX: 0000000000452a39 RDX: 0000000000000017 RSI: 0000000000000000 RDI: 0000000000000014 RBP: 0000000000000553 R08: 0000000000000200 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f6068 R13: 00000000ffffffff R14: 00007fd3c3f1c6d4 R15: 0000000000000002 QAT: Invalid ioctl QAT: Device 0 not found QAT: Invalid ioctl QAT: Device 0 not found QAT: Invalid ioctl QAT: Device 0 not found QAT: Invalid ioctl QAT: Device 0 not found QAT: Invalid ioctl QAT: Device 0 not found QAT: Invalid ioctl QAT: Device 0 not found QAT: Invalid ioctl QAT: Device 0 not found QAT: Invalid ioctl QAT: Device 0 not found QAT: Invalid ioctl hrtimer: interrupt took 16851 ns QAT: Device 0 not found QAT: Invalid ioctl QAT: Device 0 not found QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 1 CPU: 0 PID: 5044 Comm: syz-executor6 Not tainted 4.15.0-rc2-mm1+ #39 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+0x194/0x257 lib/dump_stack.c:53 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_failslab+0xec/0x120 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:425 [inline] slab_alloc mm/slab.c:3372 [inline] __do_kmalloc mm/slab.c:3710 [inline] __kmalloc_track_caller+0x5f/0x760 mm/slab.c:3727 memdup_user+0x2c/0x90 mm/util.c:164 strndup_user+0x62/0xb0 mm/util.c:195 copy_mount_string fs/namespace.c:2746 [inline] SYSC_mount fs/namespace.c:3042 [inline] SyS_mount+0x3c/0x120 fs/namespace.c:3034 entry_SYSCALL_64_fastpath+0x1f/0x96 RIP: 0033:0x452a39 RSP: 002b:00007fbaf3aafc58 EFLAGS: 00000212 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fbaf3aafaa0 RCX: 0000000000452a39 RDX: 00000000201c7ffa RSI: 0000000020cbeff8 RDI: 00000000202b9ff8 RBP: 00007fbaf3aafa90 R08: 00000000204cd000 R09: 0000000000000000 R10: 0000000000080000 R11: 0000000000000212 R12: 00000000004b75fb R13: 00007fbaf3aafbc8 R14: 00000000004b75fb R15: 0000000000000000 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 5070 Comm: syz-executor6 Not tainted 4.15.0-rc2-mm1+ #39 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+0x194/0x257 lib/dump_stack.c:53 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_failslab+0xec/0x120 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:425 [inline] slab_alloc mm/slab.c:3372 [inline] __do_kmalloc mm/slab.c:3710 [inline] __kmalloc_track_caller+0x5f/0x760 mm/slab.c:3727 memdup_user+0x2c/0x90 mm/util.c:164 strndup_user+0x62/0xb0 mm/util.c:195 copy_mount_string fs/namespace.c:2746 [inline] SYSC_mount fs/namespace.c:3047 [inline] SyS_mount+0x6b/0x120 fs/namespace.c:3034 entry_SYSCALL_64_fastpath+0x1f/0x96 RIP: 0033:0x452a39 RSP: 002b:00007fbaf3aafc58 EFLAGS: 00000212 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fbaf3aafaa0 RCX: 0000000000452a39 RDX: 00000000201c7ffa RSI: 0000000020cbeff8 RDI: 00000000202b9ff8 RBP: 00007fbaf3aafa90 R08: 00000000204cd000 R09: 0000000000000000 R10: 0000000000080000 R11: 0000000000000212 R12: 00000000004b75fb R13: 00007fbaf3aafbc8 R14: 00000000004b75fb R15: 0000000000000000 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 PID: 5076 Comm: syz-executor6 Not tainted 4.15.0-rc2-mm1+ #39 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+0x194/0x257 lib/dump_stack.c:53 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_failslab+0xec/0x120 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:425 [inline] slab_alloc mm/slab.c:3372 [inline] kmem_cache_alloc_trace+0x4b/0x750 mm/slab.c:3612 kmalloc include/linux/slab.h:516 [inline] copy_mount_options+0x5f/0x2e0 fs/namespace.c:2721 SYSC_mount fs/namespace.c:3052 [inline] SyS_mount+0x87/0x120 fs/namespace.c:3034 entry_SYSCALL_64_fastpath+0x1f/0x96 RIP: 0033:0x452a39 RSP: 002b:00007fbaf3aafc58 EFLAGS: 00000212 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fbaf3aafaa0 RCX: 0000000000452a39 RDX: 00000000201c7ffa RSI: 0000000020cbeff8 RDI: 00000000202b9ff8 RBP: 00007fbaf3aafa90 R08: 00000000204cd000 R09: 0000000000000000 R10: 0000000000080000 R11: 0000000000000212 R12: 00000000004b75fb R13: 00007fbaf3aafbc8 R14: 00000000004b75fb R15: 0000000000000000 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 PID: 5085 Comm: syz-executor6 Not tainted 4.15.0-rc2-mm1+ #39 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+0x194/0x257 lib/dump_stack.c:53 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_failslab+0xec/0x120 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:425 [inline] slab_alloc mm/slab.c:3372 [inline] kmem_cache_alloc+0x47/0x760 mm/slab.c:3546 ptlock_alloc+0x24/0x70 mm/memory.c:4681 ptlock_init include/linux/mm.h:1790 [inline] pgtable_page_ctor include/linux/mm.h:1824 [inline] pte_alloc_one+0x59/0x100 arch/x86/mm/pgtable.c:32 do_huge_pmd_anonymous_page+0xc23/0x1b00 mm/huge_memory.c:689 create_huge_pmd mm/memory.c:3823 [inline] __handle_mm_fault+0x1b68/0x3dd0 mm/memory.c:4027 handle_mm_fault+0x38f/0x930 mm/memory.c:4093 __do_page_fault+0x5c9/0xc90 arch/x86/mm/fault.c:1429 do_page_fault+0xee/0x720 arch/x86/mm/fault.c:1504 page_fault+0x2c/0x60 arch/x86/entry/entry_64.S:1243 RIP: 0010:exact_copy_from_user fs/namespace.c:2701 [inline] RIP: 0010:copy_mount_options+0x190/0x2e0 fs/namespace.c:2734 RSP: 0018:ffff880190667ed8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 00000000204cd000 RCX: ffffffff81b8236b RDX: 000000000000010d RSI: ffffc90002c0d000 RDI: ffff8801c52c99e0 RBP: ffff880190667f10 R08: 0000000000000006 R09: ffff880190667bf8 R10: 000000002b4d84d3 R11: 00000000a85a9391 R12: 0000000000001000 R13: ffff8801c521c800 R14: ffff8801c521c800 R15: 00000000204ce000 SYSC_mount fs/namespace.c:3052 [inline] SyS_mount+0x87/0x120 fs/namespace.c:3034 entry_SYSCALL_64_fastpath+0x1f/0x96 RIP: 0033:0x452a39 RSP: 002b:00007fbaf3aafc58 EFLAGS: 00000212 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fbaf3aafaa0 RCX: 0000000000452a39 RDX: 00000000201c7ffa RSI: 0000000020cbeff8 RDI: 00000000202b9ff8 RBP: 00007fbaf3aafa90 R08: 00000000204cd000 R09: 0000000000000000 R10: 0000000000080000 R11: 0000000000000212 R12: 00000000004b75fb R13: 00007fbaf3aafbc8 R14: 00000000004b75fb R15: 0000000000000000 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 5090 Comm: syz-executor6 Not tainted 4.15.0-rc2-mm1+ #39 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+0x194/0x257 lib/dump_stack.c:53 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_failslab+0xec/0x120 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:425 [inline] slab_alloc mm/slab.c:3372 [inline] kmem_cache_alloc+0x47/0x760 mm/slab.c:3546 ptlock_alloc+0x24/0x70 mm/memory.c:4681 ptlock_init include/linux/mm.h:1790 [inline] pgtable_page_ctor include/linux/mm.h:1824 [inline] pte_alloc_one+0x59/0x100 arch/x86/mm/pgtable.c:32 do_huge_pmd_anonymous_page+0xc23/0x1b00 mm/huge_memory.c:689 create_huge_pmd mm/memory.c:3823 [inline] __handle_mm_fault+0x1b68/0x3dd0 mm/memory.c:4027 handle_mm_fault+0x38f/0x930 mm/memory.c:4093 __do_page_fault+0x5c9/0xc90 arch/x86/mm/fault.c:1429 do_page_fault+0xee/0x720 arch/x86/mm/fault.c:1504 page_fault+0x2c/0x60 arch/x86/entry/entry_64.S:1243 RIP: 0010:exact_copy_from_user fs/namespace.c:2701 [inline] RIP: 0010:copy_mount_options+0x190/0x2e0 fs/namespace.c:2734 RSP: 0018:ffff880192447ed8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 00000000204cd000 RCX: ffffffff81b8236b RDX: 0000000000000113 RSI: ffffc90002c0d000 RDI: ffff8801c5211b20 RBP: ffff880192447f10 R08: 0000000000000006 R09: ffff880192447bf8 R10: 000000002b4d84d3 R11: 00000000a85a9391 R12: 0000000000001000 R13: ffff8801c5060180 R14: ffff8801c5060180 R15: 00000000204ce000 SYSC_mount fs/namespace.c:3052 [inline] SyS_mount+0x87/0x120 fs/namespace.c:3034 entry_SYSCALL_64_fastpath+0x1f/0x96 RIP: 0033:0x452a39 RSP: 002b:00007fbaf3aafc58 EFLAGS: 00000212 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fbaf3aafaa0 RCX: 0000000000452a39 RDX: 00000000201c7ffa RSI: 0000000020cbeff8 RDI: 00000000202b9ff8 RBP: 00007fbaf3aafa90 R08: 00000000204cd000 R09: 0000000000000000 R10: 0000000000080000 R11: 0000000000000212 R12: 00000000004b75fb R13: 00007fbaf3aafbc8 R14: 00000000004b75fb R15: 0000000000000000 FAULT_INJECTION: forcing a failure. name fail_page_alloc, interval 1, probability 0, space 0, times 1 CPU: 1 PID: 5095 Comm: syz-executor6 Not tainted 4.15.0-rc2-mm1+ #39 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+0x194/0x257 lib/dump_stack.c:53 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_fail_alloc_page mm/page_alloc.c:2954 [inline] prepare_alloc_pages mm/page_alloc.c:4193 [inline] __alloc_pages_nodemask+0x338/0xd80 mm/page_alloc.c:4232 __alloc_pages include/linux/gfp.h:456 [inline] __alloc_pages_node include/linux/gfp.h:469 [inline] kmem_getpages mm/slab.c:1414 [inline] cache_grow_begin+0x72/0x570 mm/slab.c:2672 cache_alloc_refill mm/slab.c:3039 [inline] ____cache_alloc mm/slab.c:3121 [inline] __do_cache_alloc mm/slab.c:3343 [inline] slab_alloc mm/slab.c:3378 [inline] kmem_cache_alloc+0x403/0x760 mm/slab.c:3546 getname_flags+0xcb/0x580 fs/namei.c:138 user_path_at_empty+0x2d/0x50 fs/namei.c:2587 user_path include/linux/namei.h:62 [inline] do_mount+0x15f/0x2bb0 fs/namespace.c:2782 SYSC_mount fs/namespace.c:3057 [inline] SyS_mount+0xab/0x120 fs/namespace.c:3034 entry_SYSCALL_64_fastpath+0x1f/0x96 RIP: 0033:0x452a39 RSP: 002b:00007fbaf3aafc58 EFLAGS: 00000212 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fbaf3aafaa0 RCX: 0000000000452a39 RDX: 00000000201c7ffa RSI: 0000000020cbeff8 RDI: 00000000202b9ff8 RBP: 00007fbaf3aafa90 R08: 00000000204cd000 R09: 0000000000000000 R10: 0000000000080000 R11: 0000000000000212 R12: 00000000004b75fb R13: 00007fbaf3aafbc8 R14: 00000000004b75fb R15: 0000000000000000 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 5100 Comm: syz-executor0 Not tainted 4.15.0-rc2-mm1+ #39 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+0x194/0x257 lib/dump_stack.c:53 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_failslab+0xec/0x120 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:425 [inline] slab_alloc mm/slab.c:3372 [inline] __do_kmalloc mm/slab.c:3710 [inline] __kmalloc_track_caller+0x5f/0x760 mm/slab.c:3727 memdup_user+0x2c/0x90 mm/util.c:164 strndup_user+0x62/0xb0 mm/util.c:195 copy_mount_string fs/namespace.c:2746 [inline] SYSC_mount fs/namespace.c:3042 [inline] SyS_mount+0x3c/0x120 fs/namespace.c:3034 entry_SYSCALL_64_fastpath+0x1f/0x96 RIP: 0033:0x452a39 RSP: 002b:00007f1508b9dc58 EFLAGS: 00000212 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f1508b9daa0 RCX: 0000000000452a39 RDX: 0000000020184000 RSI: 0000000020e1eff8 RDI: 0000000020011ff8 RBP: 00007f1508b9da90 R08: 000000002078a000 R09: 0000000000000000 R10: 0000000000001000 R11: 0000000000000212 R12: 00000000004b75fb R13: 00007f1508b9dbc8 R14: 00000000004b75fb R15: 0000000000000000 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 5101 Comm: syz-executor5 Not tainted 4.15.0-rc2-mm1+ #39 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+0x194/0x257 lib/dump_stack.c:53 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_failslab+0xec/0x120 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:425 [inline] slab_alloc mm/slab.c:3372 [inline] __do_kmalloc mm/slab.c:3710 [inline] __kmalloc_track_caller+0x5f/0x760 mm/slab.c:3727 memdup_user+0x2c/0x90 mm/util.c:164 strndup_user+0x62/0xb0 mm/util.c:195 copy_mount_string fs/namespace.c:2746 [inline] SYSC_mount fs/namespace.c:3042 [inline] SyS_mount+0x3c/0x120 fs/namespace.c:3034 entry_SYSCALL_64_fastpath+0x1f/0x96 RIP: 0033:0x452a39 RSP: 002b:00007ffa8fc33c58 EFLAGS: 00000212 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ffa8fc33aa0 RCX: 0000000000452a39 RDX: 0000000020184000 RSI: 0000000020e1eff8 RDI: 0000000020011ff8 RBP: 00007ffa8fc33a90 R08: 000000002078a000 R09: 0000000000000000 R10: 0000000000001000 R11: 0000000000000212 R12: 00000000004b75fb R13: 00007ffa8fc33bc8 R14: 00000000004b75fb R15: 0000000000000000 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 PID: 5113 Comm: syz-executor5 Not tainted 4.15.0-rc2-mm1+ #39 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+0x194/0x257 lib/dump_stack.c:53 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_failslab+0xec/0x120 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:425 [inline] slab_alloc mm/slab.c:3372 [inline] __do_kmalloc mm/slab.c:3710 [inline] __kmalloc_track_caller+0x5f/0x760 mm/slab.c:3727 memdup_user+0x2c/0x90 mm/util.c:164 strndup_user+0x62/0xb0 mm/util.c:195 copy_mount_string fs/namespace.c:2746 [inline] SYSC_mount fs/namespace.c:3047 [inline] SyS_mount+0x6b/0x120 fs/namespace.c:3034 entry_SYSCALL_64_fastpath+0x1f/0x96 RIP: 0033:0x452a39 RSP: 002b:00007ffa8fc33c58 EFLAGS: 00000212 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ffa8fc33aa0 RCX: 0000000000452a39 RDX: 0000000020184000 RSI: 0000000020e1eff8 RDI: 0000000020011ff8 RBP: 00007ffa8fc33a90 R08: 000000002078a000 R09: 0000000000000000 R10: 0000000000001000 R11: 0000000000000212 R12: 00000000004b75fb R13: 00007ffa8fc33bc8 R14: 00000000004b75fb R15: 0000000000000000 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 5110 Comm: syz-executor0 Not tainted 4.15.0-rc2-mm1+ #39 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+0x194/0x257 lib/dump_stack.c:53 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_failslab+0xec/0x120 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:425 [inline] slab_alloc mm/slab.c:3372 [inline] __do_kmalloc mm/slab.c:3710 [inline] __kmalloc_track_caller+0x5f/0x760 mm/slab.c:3727 memdup_user+0x2c/0x90 mm/util.c:164 strndup_user+0x62/0xb0 mm/util.c:195 copy_mount_string fs/namespace.c:2746 [inline] SYSC_mount fs/namespace.c:3047 [inline] SyS_mount+0x6b/0x120 fs/namespace.c:3034 entry_SYSCALL_64_fastpath+0x1f/0x96 RIP: 0033:0x452a39 RSP: 002b:00007f1508b9dc58 EFLAGS: 00000212 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f1508b9daa0 RCX: 0000000000452a39 RDX: 0000000020184000 RSI: 0000000020e1eff8 RDI: 0000000020011ff8 RBP: 00007f1508b9da90 R08: 000000002078a000 R09: 0000000000000000 R10: 0000000000001000 R11: 0000000000000212 R12: 00000000004b75fb R13: 00007f1508b9dbc8 R14: 00000000004b75fb R15: 0000000000000000 FAULT_INJECTION: forcing a failure. name fail_page_alloc, interval 1, probability 0, space 0, times 0 CPU: 1 PID: 5114 Comm: syz-executor6 Not tainted 4.15.0-rc2-mm1+ #39 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+0x194/0x257 lib/dump_stack.c:53 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_fail_alloc_page mm/page_alloc.c:2954 [inline] prepare_alloc_pages mm/page_alloc.c:4193 [inline] __alloc_pages_nodemask+0x338/0xd80 mm/page_alloc.c:4232 __alloc_pages include/linux/gfp.h:456 [inline] __alloc_pages_node include/linux/gfp.h:469 [inline] kmem_getpages mm/slab.c:1414 [inline] cache_grow_begin+0x72/0x570 mm/slab.c:2672 cache_alloc_refill mm/slab.c:3039 [inline] ____cache_alloc mm/slab.c:3121 [inline] __do_cache_alloc mm/slab.c:3343 [inline] slab_alloc mm/slab.c:3378 [inline] kmem_cache_alloc+0x403/0x760 mm/slab.c:3546 getname_flags+0xcb/0x580 fs/namei.c:138 user_path_at_empty+0x2d/0x50 fs/namei.c:2587 user_path include/linux/namei.h:62 [inline] do_mount+0x15f/0x2bb0 fs/namespace.c:2782 SYSC_mount fs/namespace.c:3057 [inline] SyS_mount+0xab/0x120 fs/namespace.c:3034 entry_SYSCALL_64_fastpath+0x1f/0x96 RIP: 0033:0x452a39 RSP: 002b:00007fbaf3aafc58 EFLAGS: 00000212 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fbaf3aafaa0 RCX: 0000000000452a39 RDX: 00000000201c7ffa RSI: 0000000020cbeff8 RDI: 00000000202b9ff8 RBP: 00007fbaf3aafa90 R08: 00000000204cd000 R09: 0000000000000000 R10: 0000000000080000 R11: 0000000000000212 R12: 00000000004b75fb R13: 00007fbaf3aafbc8 R14: 00000000004b75fb R15: 0000000000000000 CPU: 0 PID: 5068 Comm: syz-executor1 Not tainted 4.15.0-rc2-mm1+ #39 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+0x194/0x257 lib/dump_stack.c:53 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_failslab+0xec/0x120 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:425 [inline] slab_alloc mm/slab.c:3372 [inline] kmem_cache_alloc+0x47/0x760 mm/slab.c:3546 ptlock_alloc+0x24/0x70 mm/memory.c:4681 ptlock_init include/linux/mm.h:1790 [inline] pgtable_page_ctor include/linux/mm.h:1824 [inline] pte_alloc_one+0x59/0x100 arch/x86/mm/pgtable.c:32 do_huge_pmd_anonymous_page+0xc23/0x1b00 mm/huge_memory.c:689 create_huge_pmd mm/memory.c:3823 [inline] __handle_mm_fault+0x1b68/0x3dd0 mm/memory.c:4027 handle_mm_fault+0x38f/0x930 mm/memory.c:4093 __do_page_fault+0x5c9/0xc90 arch/x86/mm/fault.c:1429 do_page_fault+0xee/0x720 arch/x86/mm/fault.c:1504 page_fault+0x4c/0x60 arch/x86/entry/entry_64.S:1243 RIP: 0033:0x401819 RSP: 002b:00007ffb2d25fb90 EFLAGS: 00010246 RAX: 0000000020000000 RBX: 0000000000000046 RCX: 0000000000000000 RDX: d7078a01e6ff79a0 RSI: 0000000000000000 RDI: 00007ffb2d260608 RBP: 0000000020dee000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000046 R11: 0000000000000000 R12: 00000000006f66c8 R13: 0000000000000013 R14: 00007ffb2d2606d4 R15: ffffffffffffffff FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 PID: 5150 Comm: syz-executor5 Not tainted 4.15.0-rc2-mm1+ #39 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+0x194/0x257 lib/dump_stack.c:53 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_failslab+0xec/0x120 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:425 [inline] slab_alloc mm/slab.c:3372 [inline] kmem_cache_alloc_trace+0x4b/0x750 mm/slab.c:3612 kmalloc include/linux/slab.h:516 [inline] copy_mount_options+0x5f/0x2e0 fs/namespace.c:2721 SYSC_mount fs/namespace.c:3052 [inline] SyS_mount+0x87/0x120 fs/namespace.c:3034 entry_SYSCALL_64_fastpath+0x1f/0x96 RIP: 0033:0x452a39 RSP: 002b:00007ffa8fc33c58 EFLAGS: 00000212 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ffa8fc33aa0 RCX: 0000000000452a39 RDX: 0000000020184000 RSI: 0000000020e1eff8 RDI: 0000000020011ff8 RBP: 00007ffa8fc33a90 R08: 000000002078a000 R09: 0000000000000000 R10: 0000000000001000 R11: 0000000000000212 R12: 00000000004b75fb R13: 00007ffa8fc33bc8 R14: 00000000004b75fb R15: 0000000000000000 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 5155 Comm: syz-executor5 Not tainted 4.15.0-rc2-mm1+ #39 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+0x194/0x257 lib/dump_stack.c:53 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_failslab+0xec/0x120 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:425 [inline] slab_alloc mm/slab.c:3372 [inline] kmem_cache_alloc+0x47/0x760 mm/slab.c:3546 ptlock_alloc+0x24/0x70 mm/memory.c:4681 ptlock_init include/linux/mm.h:1790 [inline] pgtable_page_ctor include/linux/mm.h:1824 [inline] pte_alloc_one+0x59/0x100 arch/x86/mm/pgtable.c:32 do_huge_pmd_anonymous_page+0xc23/0x1b00 mm/huge_memory.c:689 create_huge_pmd mm/memory.c:3823 [inline] __handle_mm_fault+0x1b68/0x3dd0 mm/memory.c:4027 handle_mm_fault+0x38f/0x930 mm/memory.c:4093 __do_page_fault+0x5c9/0xc90 arch/x86/mm/fault.c:1429 do_page_fault+0xee/0x720 arch/x86/mm/fault.c:1504 page_fault+0x2c/0x60 arch/x86/entry/entry_64.S:1243 RIP: 0010:exact_copy_from_user fs/namespace.c:2701 [inline] RIP: 0010:copy_mount_options+0x190/0x2e0 fs/namespace.c:2734 RSP: 0018:ffff8801bce77ed8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 000000002078a000 RCX: ffffffff81b8236b RDX: 0000000000000110 RSI: ffffc90003cae000 RDI: ffff8801c49af9a0 RBP: ffff8801bce77f10 R08: 0000000000000006 R09: ffff8801bce77bf8 R10: 000000002b4d84d3 R11: 00000000a85a9391 R12: 0000000000001000 R13: ffff8801c481ca80 R14: ffff8801c481ca80 R15: 000000002078b000 SYSC_mount fs/namespace.c:3052 [inline] SyS_mount+0x87/0x120 fs/namespace.c:3034 entry_SYSCALL_64_fastpath+0x1f/0x96 RIP: 0033:0x452a39 RSP: 002b:00007ffa8fc33c58 EFLAGS: 00000212 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ffa8fc33aa0 RCX: 0000000000452a39 RDX: 0000000020184000 RSI: 0000000020e1eff8 RDI: 0000000020011ff8 RBP: 00007ffa8fc33a90 R08: 000000002078a000 R09: 0000000000000000 R10: 0000000000001000 R11: 0000000000000212 R12: 00000000004b75fb R13: 00007ffa8fc33bc8 R14: 00000000004b75fb R15: 0000000000000000 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 5165 Comm: syz-executor5 Not tainted 4.15.0-rc2-mm1+ #39 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+0x194/0x257 lib/dump_stack.c:53 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_failslab+0xec/0x120 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:425 [inline] slab_alloc mm/slab.c:3372 [inline] kmem_cache_alloc+0x47/0x760 mm/slab.c:3546 ptlock_alloc+0x24/0x70 mm/memory.c:4681 ptlock_init include/linux/mm.h:1790 [inline] pgtable_page_ctor include/linux/mm.h:1824 [inline] pte_alloc_one+0x59/0x100 arch/x86/mm/pgtable.c:32 do_huge_pmd_anonymous_page+0xc23/0x1b00 mm/huge_memory.c:689 create_huge_pmd mm/memory.c:3823 [inline] __handle_mm_fault+0x1b68/0x3dd0 mm/memory.c:4027 handle_mm_fault+0x38f/0x930 mm/memory.c:4093 __do_page_fault+0x5c9/0xc90 arch/x86/mm/fault.c:1429 do_page_fault+0xee/0x720 arch/x86/mm/fault.c:1504 page_fault+0x2c/0x60 arch/x86/entry/entry_64.S:1243 RIP: 0010:exact_copy_from_user fs/namespace.c:2701 [inline] RIP: 0010:copy_mount_options+0x190/0x2e0 fs/namespace.c:2734 RSP: 0018:ffff8801c7057ed8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 000000002078a000 RCX: ffffffff81b8236b RDX: 0000000000000116 RSI: ffffc90003cae000 RDI: ffff8801c6461660 RBP: ffff8801c7057f10 R08: 0000000000000006 R09: ffff8801c7057bf8 R10: 000000002b4d84d3 R11: 00000000a85a9391 R12: 0000000000001000 R13: ffff8801c553a400 R14: ffff8801c553a400 R15: 000000002078b000 SYSC_mount fs/namespace.c:3052 [inline] SyS_mount+0x87/0x120 fs/namespace.c:3034 entry_SYSCALL_64_fastpath+0x1f/0x96 RIP: 0033:0x452a39 RSP: 002b:00007ffa8fc33c58 EFLAGS: 00000212 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ffa8fc33aa0 RCX: 0000000000452a39 RDX: 0000000020184000 RSI: 0000000020e1eff8 RDI: 0000000020011ff8 RBP: 00007ffa8fc33a90 R08: 000000002078a000 R09: 0000000000000000 R10: 0000000000001000 R11: 0000000000000212 R12: 00000000004b75fb R13: 00007ffa8fc33bc8 R14: 00000000004b75fb R15: 0000000000000000 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 5170 Comm: syz-executor5 Not tainted 4.15.0-rc2-mm1+ #39 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+0x194/0x257 lib/dump_stack.c:53 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_failslab+0xec/0x120 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:425 [inline] slab_alloc mm/slab.c:3372 [inline] kmem_cache_alloc+0x47/0x760 mm/slab.c:3546 getname_flags+0xcb/0x580 fs/namei.c:138 user_path_at_empty+0x2d/0x50 fs/namei.c:2587 user_path include/linux/namei.h:62 [inline] do_mount+0x15f/0x2bb0 fs/namespace.c:2782 SYSC_mount fs/namespace.c:3057 [inline] SyS_mount+0xab/0x120 fs/namespace.c:3034 entry_SYSCALL_64_fastpath+0x1f/0x96 RIP: 0033:0x452a39 RSP: 002b:00007ffa8fc33c58 EFLAGS: 00000212 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ffa8fc33aa0 RCX: 0000000000452a39 RDX: 0000000020184000 RSI: 0000000020e1eff8 RDI: 0000000020011ff8 RBP: 00007ffa8fc33a90 R08: 000000002078a000 R09: 0000000000000000 R10: 0000000000001000 R11: 0000000000000212 R12: 00000000004b75fb R13: 00007ffa8fc33bc8 R14: 00000000004b75fb R15: 0000000000000000 FAULT_INJECTION: forcing a failure. name fail_page_alloc, interval 1, probability 0, space 0, times 0 CPU: 1 PID: 5177 Comm: syz-executor5 Not tainted 4.15.0-rc2-mm1+ #39 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+0x194/0x257 lib/dump_stack.c:53 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_fail_alloc_page mm/page_alloc.c:2954 [inline] prepare_alloc_pages mm/page_alloc.c:4193 [inline] __alloc_pages_nodemask+0x338/0xd80 mm/page_alloc.c:4232 __alloc_pages include/linux/gfp.h:456 [inline] __alloc_pages_node include/linux/gfp.h:469 [inline] kmem_getpages mm/slab.c:1414 [inline] cache_grow_begin+0x72/0x570 mm/slab.c:2672 cache_alloc_refill mm/slab.c:3039 [inline] ____cache_alloc mm/slab.c:3121 [inline] __do_cache_alloc mm/slab.c:3343 [inline] slab_alloc mm/slab.c:3378 [inline] kmem_cache_alloc+0x403/0x760 mm/slab.c:3546 getname_flags+0xcb/0x580 fs/namei.c:138 user_path_at_empty+0x2d/0x50 fs/namei.c:2587 user_path include/linux/namei.h:62 [inline] do_mount+0x15f/0x2bb0 fs/namespace.c:2782 SYSC_mount fs/namespace.c:3057 [inline] SyS_mount+0xab/0x120 fs/namespace.c:3034 entry_SYSCALL_64_fastpath+0x1f/0x96 RIP: 0033:0x452a39 RSP: 002b:00007ffa8fc33c58 EFLAGS: 00000212 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ffa8fc33aa0 RCX: 0000000000452a39 RDX: 0000000020184000 RSI: 0000000020e1eff8 RDI: 0000000020011ff8 RBP: 00007ffa8fc33a90 R08: 000000002078a000 R09: 0000000000000000 R10: 0000000000001000 R11: 0000000000000212 R12: 00000000004b75fb R13: 00007ffa8fc33bc8 R14: 00000000004b75fb R15: 0000000000000000 CPU: 0 PID: 5143 Comm: syz-executor0 Not tainted 4.15.0-rc2-mm1+ #39 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+0x194/0x257 lib/dump_stack.c:53 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149