bisecting fixing commit since 4d552acf337038028f7e2f63a927afb7adf65fc1 building syzkaller on 13030ef80c19571b552c1aacd01b3b4d1f4075bf testing commit 4d552acf337038028f7e2f63a927afb7adf65fc1 with gcc (GCC) 8.1.0 kernel signature: 97de566aa59d87f30305c6019a5c5f8e0bc07096c1394ff559cff40d4865a8a1 run #0: crashed: possible deadlock in pty_write run #1: crashed: possible deadlock in pty_write run #2: crashed: possible deadlock in console_unlock run #3: crashed: possible deadlock in console_unlock run #4: crashed: possible deadlock in pty_write run #5: crashed: possible deadlock in console_unlock run #6: crashed: possible deadlock in console_unlock run #7: crashed: possible deadlock in pty_write run #8: crashed: possible deadlock in console_unlock run #9: crashed: possible deadlock in console_unlock testing current HEAD 2d16cf4817bc6944a2adb5bf4db607c8258e87da testing commit 2d16cf4817bc6944a2adb5bf4db607c8258e87da with gcc (GCC) 8.1.0 kernel signature: 793fa056915611cdbc8938d53250597e6576468d39a7671f58380afc88ee9bd5 run #0: crashed: possible deadlock in pty_write run #1: crashed: possible deadlock in pty_write run #2: crashed: possible deadlock in pty_write run #3: crashed: possible deadlock in pty_write run #4: crashed: possible deadlock in console_unlock run #5: crashed: possible deadlock in pty_write run #6: crashed: possible deadlock in console_unlock run #7: crashed: possible deadlock in console_unlock run #8: crashed: possible deadlock in console_unlock run #9: crashed: possible deadlock in pty_write revisions tested: 2, total time: 24m42.174040989s (build: 17m39.706261063s, test: 6m15.52726888s) the crash still happens on HEAD commit msg: Linux 4.19.125 crash: possible deadlock in pty_write RDX: 0000000020000040 RSI: 0000000000005412 RDI: 0000000000000004 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc56dfb36d4 R13: 00000000004c2d94 R14: 00000000004d5c98 R15: 0000000000000005 ====================================================== WARNING: possible circular locking dependency detected 4.19.125-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.4/7121 is trying to acquire lock: 000000004a6bbd53 (console_owner){-...}, at: console_trylock_spinning kernel/printk/printk.c:1669 [inline] 000000004a6bbd53 (console_owner){-...}, at: vprintk_emit+0x2b8/0x540 kernel/printk/printk.c:1936 but task is already holding lock: 00000000ae5a5199 (&(&port->lock)->rlock){-.-.}, at: pty_write+0xbf/0x200 drivers/tty/pty.c:120 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&(&port->lock)->rlock){-.-.}: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x99/0xd0 kernel/locking/spinlock.c:152 tty_port_tty_get+0x1b/0x70 drivers/tty/tty_port.c:289 tty_port_default_wakeup+0xa/0x30 drivers/tty/tty_port.c:47 tty_port_tty_wakeup+0x58/0x70 drivers/tty/tty_port.c:391 uart_write_wakeup+0x37/0x50 drivers/tty/serial/serial_core.c:103 serial8250_tx_chars+0x3eb/0x9f0 drivers/tty/serial/8250/8250_port.c:1806 serial8250_handle_irq.part.23+0x1c5/0x220 drivers/tty/serial/8250/8250_port.c:1879 serial8250_handle_irq drivers/tty/serial/8250/8250_port.c:1865 [inline] serial8250_default_handle_irq+0x82/0xe0 drivers/tty/serial/8250/8250_port.c:1895 serial8250_interrupt+0xd8/0x170 drivers/tty/serial/8250/8250_core.c:125 __handle_irq_event_percpu+0x102/0x660 kernel/irq/handle.c:149 handle_irq_event_percpu+0x6c/0x140 kernel/irq/handle.c:189 handle_irq_event+0xa2/0x130 kernel/irq/handle.c:206 handle_edge_irq+0x20b/0x790 kernel/irq/chip.c:797 generic_handle_irq_desc include/linux/irqdesc.h:155 [inline] handle_irq+0x231/0x392 arch/x86/kernel/irq_64.c:87 do_IRQ+0x98/0x1d0 arch/x86/kernel/irq.c:246 ret_from_intr+0x0/0x1e native_safe_halt+0x12/0x20 arch/x86/include/asm/irqflags.h:60 arch_safe_halt arch/x86/include/asm/paravirt.h:94 [inline] default_idle+0x51/0x320 arch/x86/kernel/process.c:565 arch_cpu_idle+0x10/0x20 arch/x86/kernel/process.c:556 default_idle_call+0x6d/0x90 kernel/sched/idle.c:93 cpuidle_idle_call kernel/sched/idle.c:153 [inline] do_idle+0x41e/0x560 kernel/sched/idle.c:263 cpu_startup_entry+0xc8/0xe0 kernel/sched/idle.c:369 rest_init+0x193/0x199 init/main.c:441 start_kernel+0x710/0x74c init/main.c:737 x86_64_start_reservations+0x29/0x2b arch/x86/kernel/head64.c:490 x86_64_start_kernel+0x76/0x79 arch/x86/kernel/head64.c:471 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243 -> #1 (&port_lock_key){-.-.}: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x99/0xd0 kernel/locking/spinlock.c:152 serial8250_console_write+0x6e2/0x8a0 drivers/tty/serial/8250/8250_port.c:3251 univ8250_console_write+0x4e/0x70 drivers/tty/serial/8250/8250_core.c:589 call_console_drivers kernel/printk/printk.c:1736 [inline] console_unlock+0x8c1/0xdf0 kernel/printk/printk.c:2429 vprintk_emit+0x191/0x540 kernel/printk/printk.c:1937 vprintk_default+0x1a/0x20 kernel/printk/printk.c:1979 vprintk_func+0x49/0x12c kernel/printk/printk_safe.c:398 printk+0x9a/0xc0 kernel/printk/printk.c:2012 register_console+0x5d0/0x990 kernel/printk/printk.c:2745 univ8250_console_init+0x1e/0x28 drivers/tty/serial/8250/8250_core.c:684 console_init+0x317/0x481 kernel/printk/printk.c:2831 start_kernel+0x4b7/0x74c init/main.c:660 x86_64_start_reservations+0x29/0x2b arch/x86/kernel/head64.c:490 x86_64_start_kernel+0x76/0x79 arch/x86/kernel/head64.c:471 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243 -> #0 (console_owner){-...}: lock_acquire+0x173/0x3d0 kernel/locking/lockdep.c:3907 console_trylock_spinning kernel/printk/printk.c:1690 [inline] vprintk_emit+0x2eb/0x540 kernel/printk/printk.c:1936 vprintk_default+0x1a/0x20 kernel/printk/printk.c:1979 vprintk_func+0x49/0x12c kernel/printk/printk_safe.c:398 printk+0x9a/0xc0 kernel/printk/printk.c:2012 fail_dump lib/fault-inject.c:44 [inline] should_fail+0x551/0x68a lib/fault-inject.c:149 __should_failslab+0xba/0xf0 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1558 slab_pre_alloc_hook mm/slab.h:424 [inline] slab_alloc mm/slab.c:3383 [inline] __do_kmalloc mm/slab.c:3725 [inline] __kmalloc+0x70/0x770 mm/slab.c:3736 kmalloc include/linux/slab.h:520 [inline] tty_buffer_alloc drivers/tty/tty_buffer.c:170 [inline] __tty_buffer_request_room+0x1b3/0x550 drivers/tty/tty_buffer.c:268 tty_insert_flip_string_fixed_flag+0x77/0x1a0 drivers/tty/tty_buffer.c:313 tty_insert_flip_string include/linux/tty_flip.h:37 [inline] pty_write+0xf3/0x200 drivers/tty/pty.c:122 tty_put_char+0x10d/0x130 drivers/tty/tty_io.c:2888 __process_echoes+0x311/0x790 drivers/tty/n_tty.c:726 flush_echoes drivers/tty/n_tty.c:827 [inline] __receive_buf drivers/tty/n_tty.c:1646 [inline] n_tty_receive_buf_common+0x780/0x2b80 drivers/tty/n_tty.c:1740 n_tty_receive_buf+0xc/0x10 drivers/tty/n_tty.c:1769 tiocsti drivers/tty/tty_io.c:2194 [inline] tty_ioctl+0x64e/0x12a0 drivers/tty/tty_io.c:2580 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x199/0x10d0 fs/ioctl.c:688 ksys_ioctl+0x62/0x90 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710 do_syscall_64+0xd6/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe other info that might help us debug this: Chain exists of: console_owner --> &port_lock_key --> &(&port->lock)->rlock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&(&port->lock)->rlock); lock(&port_lock_key); lock(&(&port->lock)->rlock); lock(console_owner); *** DEADLOCK *** 4 locks held by syz-executor.4/7121: #0: 0000000052d4af72 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:362 #1: 000000002efcf79a (&o_tty->termios_rwsem/1){++++}, at: n_tty_receive_buf_common+0x80/0x2b80 drivers/tty/n_tty.c:1703 #2: 00000000f36156a4 (&ldata->output_lock){+.+.}, at: flush_echoes drivers/tty/n_tty.c:825 [inline] #2: 00000000f36156a4 (&ldata->output_lock){+.+.}, at: __receive_buf drivers/tty/n_tty.c:1646 [inline] #2: 00000000f36156a4 (&ldata->output_lock){+.+.}, at: n_tty_receive_buf_common+0x740/0x2b80 drivers/tty/n_tty.c:1740 #3: 00000000ae5a5199 (&(&port->lock)->rlock){-.-.}, at: pty_write+0xbf/0x200 drivers/tty/pty.c:120 stack backtrace: CPU: 0 PID: 7121 Comm: syz-executor.4 Not tainted 4.19.125-syzkaller #0 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+0x123/0x177 lib/dump_stack.c:118 print_circular_bug.isra.34.cold.55+0x1bd/0x27d kernel/locking/lockdep.c:1221 check_prev_add kernel/locking/lockdep.c:1865 [inline] check_prevs_add kernel/locking/lockdep.c:1978 [inline] validate_chain kernel/locking/lockdep.c:2419 [inline] __lock_acquire+0x30df/0x4980 kernel/locking/lockdep.c:3415 lock_acquire+0x173/0x3d0 kernel/locking/lockdep.c:3907 console_trylock_spinning kernel/printk/printk.c:1690 [inline] vprintk_emit+0x2eb/0x540 kernel/printk/printk.c:1936 vprintk_default+0x1a/0x20 kernel/printk/printk.c:1979 vprintk_func+0x49/0x12c kernel/printk/printk_safe.c:398 printk+0x9a/0xc0 kernel/printk/printk.c:2012 fail_dump lib/fault-inject.c:44 [inline] should_fail+0x551/0x68a lib/fault-inject.c:149 __should_failslab+0xba/0xf0 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1558 slab_pre_alloc_hook mm/slab.h:424 [inline] slab_alloc mm/slab.c:3383 [inline] __do_kmalloc mm/slab.c:3725 [inline] __kmalloc+0x70/0x770 mm/slab.c:3736 kmalloc include/linux/slab.h:520 [inline] tty_buffer_alloc drivers/tty/tty_buffer.c:170 [inline] __tty_buffer_request_room+0x1b3/0x550 drivers/tty/tty_buffer.c:268 tty_insert_flip_string_fixed_flag+0x77/0x1a0 drivers/tty/tty_buffer.c:313 tty_insert_flip_string include/linux/tty_flip.h:37 [inline] pty_write+0xf3/0x200 drivers/tty/pty.c:122 tty_put_char+0x10d/0x130 drivers/tty/tty_io.c:2888 __process_echoes+0x311/0x790 drivers/tty/n_tty.c:726 flush_echoes drivers/tty/n_tty.c:827 [inline] __receive_buf drivers/tty/n_tty.c:1646 [inline] n_tty_receive_buf_common+0x780/0x2b80 drivers/tty/n_tty.c:1740 n_tty_receive_buf+0xc/0x10 drivers/tty/n_tty.c:1769 tiocsti drivers/tty/tty_io.c:2194 [inline] tty_ioctl+0x64e/0x12a0 drivers/tty/tty_io.c:2580 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x199/0x10d0 fs/ioctl.c:688 ksys_ioctl+0x62/0x90 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710 do_syscall_64+0xd6/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458c29 Code: ad b8 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 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fc56dfb2c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fc56dfb2c90 RCX: 0000000000458c29 RDX: 0000000020000040 RSI: 0000000000005412 RDI: 0000000000000004 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc56dfb36d4 R13: 00000000004c2d94 R14: 00000000004d5c98 R15: 0000000000000005 IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready IPv6: ADDRCONF(NETDEV_UP): veth0_to_hsr: link is not ready IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready bridge0: port 2(bridge_slave_1) entered blocking state bridge0: port 2(bridge_slave_1) entered forwarding state IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready IPv6: ADDRCONF(NETDEV_UP): veth1_to_hsr: link is not ready IPv6: ADDRCONF(NETDEV_UP): veth0_to_hsr: link is not ready IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready 8021q: adding VLAN 0 to HW filter on device batadv0 IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready IPv6: ADDRCONF(NETDEV_UP): veth0_to_hsr: link is not ready IPv6: ADDRCONF(NETDEV_UP): veth1_to_hsr: link is not ready IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready IPv6: ADDRCONF(NETDEV_UP): veth1_to_hsr: link is not ready IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready 8021q: adding VLAN 0 to HW filter on device batadv0 IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready 8021q: adding VLAN 0 to HW filter on device batadv0 IPv6: ADDRCONF(NETDEV_UP): veth0_to_hsr: link is not ready IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready IPv6: ADDRCONF(NETDEV_UP): veth1_to_hsr: link is not ready 8021q: adding VLAN 0 to HW filter on device batadv0 IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready CPU: 1 PID: 7159 Comm: syz-executor.5 Not tainted 4.19.125-syzkaller #0 IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready 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+0x123/0x177 lib/dump_stack.c:118 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0x5/0x13 lib/fault-inject.c:149 IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready __should_failslab+0xba/0xf0 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1558 8021q: adding VLAN 0 to HW filter on device batadv0 slab_pre_alloc_hook mm/slab.h:424 [inline] slab_alloc mm/slab.c:3383 [inline] __do_kmalloc mm/slab.c:3725 [inline] __kmalloc+0x70/0x770 mm/slab.c:3736 kmalloc include/linux/slab.h:520 [inline] tty_buffer_alloc drivers/tty/tty_buffer.c:170 [inline] __tty_buffer_request_room+0x1b3/0x550 drivers/tty/tty_buffer.c:268 tty_insert_flip_string_fixed_flag+0x77/0x1a0 drivers/tty/tty_buffer.c:313 tty_insert_flip_string include/linux/tty_flip.h:37 [inline] pty_write+0xf3/0x200 drivers/tty/pty.c:122 tty_put_char+0x10d/0x130 drivers/tty/tty_io.c:2888 __process_echoes+0x311/0x790 drivers/tty/n_tty.c:726 flush_echoes drivers/tty/n_tty.c:827 [inline] __receive_buf drivers/tty/n_tty.c:1646 [inline] n_tty_receive_buf_common+0x780/0x2b80 drivers/tty/n_tty.c:1740 n_tty_receive_buf+0xc/0x10 drivers/tty/n_tty.c:1769 tiocsti drivers/tty/tty_io.c:2194 [inline] tty_ioctl+0x64e/0x12a0 drivers/tty/tty_io.c:2580 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x199/0x10d0 fs/ioctl.c:688 ksys_ioctl+0x62/0x90 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710 do_syscall_64+0xd6/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458c29 Code: ad b8 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 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f974d3a5c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f974d3a5c90 RCX: 0000000000458c29 RDX: 0000000020000040 RSI: 0000000000005412 RDI: 0000000000000004 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f974d3a66d4 R13: 00000000004c2d94 R14: 00000000004d5c98 R15: 0000000000000005 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 7216 Comm: syz-executor.1 Not tainted 4.19.125-syzkaller #0 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+0x123/0x177 lib/dump_stack.c:118 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0x5/0x13 lib/fault-inject.c:149 __should_failslab+0xba/0xf0 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1558 slab_pre_alloc_hook mm/slab.h:424 [inline] slab_alloc mm/slab.c:3383 [inline] __do_kmalloc mm/slab.c:3725 [inline] __kmalloc+0x70/0x770 mm/slab.c:3736 kmalloc include/linux/slab.h:520 [inline] tty_buffer_alloc drivers/tty/tty_buffer.c:170 [inline] __tty_buffer_request_room+0x1b3/0x550 drivers/tty/tty_buffer.c:268 tty_insert_flip_string_fixed_flag+0x77/0x1a0 drivers/tty/tty_buffer.c:313 tty_insert_flip_string include/linux/tty_flip.h:37 [inline] pty_write+0xf3/0x200 drivers/tty/pty.c:122 tty_put_char+0x10d/0x130 drivers/tty/tty_io.c:2888 __process_echoes+0x311/0x790 drivers/tty/n_tty.c:726 flush_echoes drivers/tty/n_tty.c:827 [inline] __receive_buf drivers/tty/n_tty.c:1646 [inline] n_tty_receive_buf_common+0x780/0x2b80 drivers/tty/n_tty.c:1740 n_tty_receive_buf+0xc/0x10 drivers/tty/n_tty.c:1769 tiocsti drivers/tty/tty_io.c:2194 [inline] tty_ioctl+0x64e/0x12a0 drivers/tty/tty_io.c:2580 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x199/0x10d0 fs/ioctl.c:688 ksys_ioctl+0x62/0x90 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710 do_syscall_64+0xd6/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458c29 Code: ad b8 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 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f7fbadfdc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f7fbadfdc90 RCX: 0000000000458c29 RDX: 0000000020000040 RSI: 0000000000005412 RDI: 0000000000000004 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7fbadfe6d4 R13: 00000000004c2d94 R14: 00000000004d5c98 R15: 0000000000000005 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 7387 Comm: syz-executor.5 Not tainted 4.19.125-syzkaller #0 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+0x123/0x177 lib/dump_stack.c:118 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0x5/0x13 lib/fault-inject.c:149 __should_failslab+0xba/0xf0 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1558 slab_pre_alloc_hook mm/slab.h:424 [inline] slab_alloc mm/slab.c:3383 [inline] __do_kmalloc mm/slab.c:3725 [inline] __kmalloc+0x70/0x770 mm/slab.c:3736 kmalloc include/linux/slab.h:520 [inline] tty_buffer_alloc drivers/tty/tty_buffer.c:170 [inline] __tty_buffer_request_room+0x1b3/0x550 drivers/tty/tty_buffer.c:268 tty_insert_flip_string_fixed_flag+0x77/0x1a0 drivers/tty/tty_buffer.c:313 tty_insert_flip_string include/linux/tty_flip.h:37 [inline] pty_write+0xf3/0x200 drivers/tty/pty.c:122 tty_put_char+0x10d/0x130 drivers/tty/tty_io.c:2888 __process_echoes+0x311/0x790 drivers/tty/n_tty.c:726 flush_echoes drivers/tty/n_tty.c:827 [inline] __receive_buf drivers/tty/n_tty.c:1646 [inline] n_tty_receive_buf_common+0x780/0x2b80 drivers/tty/n_tty.c:1740 n_tty_receive_buf+0xc/0x10 drivers/tty/n_tty.c:1769 tiocsti drivers/tty/tty_io.c:2194 [inline] tty_ioctl+0x64e/0x12a0 drivers/tty/tty_io.c:2580 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x199/0x10d0 fs/ioctl.c:688 ksys_ioctl+0x62/0x90 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710 do_syscall_64+0xd6/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458c29 Code: ad b8 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 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f974d3a5c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f974d3a5c90 RCX: 0000000000458c29 RDX: 0000000020000040 RSI: 0000000000005412 RDI: 0000000000000004 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f974d3a66d4 R13: 00000000004c2d94 R14: 00000000004d5c98 R15: 0000000000000005 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 7388 Comm: syz-executor.2 Not tainted 4.19.125-syzkaller #0 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+0x123/0x177 lib/dump_stack.c:118 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0x5/0x13 lib/fault-inject.c:149 __should_failslab+0xba/0xf0 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1558 slab_pre_alloc_hook mm/slab.h:424 [inline] slab_alloc mm/slab.c:3383 [inline] __do_kmalloc mm/slab.c:3725 [inline] __kmalloc+0x70/0x770 mm/slab.c:3736 kmalloc include/linux/slab.h:520 [inline] tty_buffer_alloc drivers/tty/tty_buffer.c:170 [inline] __tty_buffer_request_room+0x1b3/0x550 drivers/tty/tty_buffer.c:268 tty_insert_flip_string_fixed_flag+0x77/0x1a0 drivers/tty/tty_buffer.c:313 tty_insert_flip_string include/linux/tty_flip.h:37 [inline] pty_write+0xf3/0x200 drivers/tty/pty.c:122 tty_put_char+0x10d/0x130 drivers/tty/tty_io.c:2888 __process_echoes+0x311/0x790 drivers/tty/n_tty.c:726 flush_echoes drivers/tty/n_tty.c:827 [inline] __receive_buf drivers/tty/n_tty.c:1646 [inline] n_tty_receive_buf_common+0x780/0x2b80 drivers/tty/n_tty.c:1740 n_tty_receive_buf+0xc/0x10 drivers/tty/n_tty.c:1769 tiocsti drivers/tty/tty_io.c:2194 [inline] tty_ioctl+0x64e/0x12a0 drivers/tty/tty_io.c:2580 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x199/0x10d0 fs/ioctl.c:688 ksys_ioctl+0x62/0x90 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710 do_syscall_64+0xd6/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458c29 Code: ad b8 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 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ff61b60fc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007ff61b60fc90 RCX: 0000000000458c29 RDX: 0000000020000040 RSI: 0000000000005412 RDI: 0000000000000004 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff61b6106d4 R13: 00000000004c2d94 R14: 00000000004d5c98 R15: 0000000000000005 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 7458 Comm: syz-executor.5 Not tainted 4.19.125-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x123/0x177 lib/dump_stack.c:118 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0x5/0x13 lib/fault-inject.c:149 __should_failslab+0xba/0xf0 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1558 slab_pre_alloc_hook mm/slab.h:424 [inline] slab_alloc mm/slab.c:3383 [inline] __do_kmalloc mm/slab.c:3725 [inline] __kmalloc+0x70/0x770 mm/slab.c:3736 kmalloc include/linux/slab.h:520 [inline] tty_buffer_alloc drivers/tty/tty_buffer.c:170 [inline] __tty_buffer_request_room+0x1b3/0x550 drivers/tty/tty_buffer.c:268 tty_insert_flip_string_fixed_flag+0x77/0x1a0 drivers/tty/tty_buffer.c:313 tty_insert_flip_string include/linux/tty_flip.h:37 [inline] pty_write+0xf3/0x200 drivers/tty/pty.c:122 tty_put_char+0x10d/0x130 drivers/tty/tty_io.c:2888 __process_echoes+0x311/0x790 drivers/tty/n_tty.c:726 flush_echoes drivers/tty/n_tty.c:827 [inline] __receive_buf drivers/tty/n_tty.c:1646 [inline] n_tty_receive_buf_common+0x780/0x2b80 drivers/tty/n_tty.c:1740 n_tty_receive_buf+0xc/0x10 drivers/tty/n_tty.c:1769 tiocsti drivers/tty/tty_io.c:2194 [inline] tty_ioctl+0x64e/0x12a0 drivers/tty/tty_io.c:2580 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x199/0x10d0 fs/ioctl.c:688 ksys_ioctl+0x62/0x90 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710 do_syscall_64+0xd6/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458c29 Code: ad b8 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 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f974d3a5c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f974d3a5c90 RCX: 0000000000458c29 RDX: 0000000020000040 RSI: 0000000000005412 RDI: 0000000000000004 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f974d3a66d4 R13: 00000000004c2d94 R14: 00000000004d5c98 R15: 0000000000000005 CPU: 1 PID: 7466 Comm: syz-executor.2 Not tainted 4.19.125-syzkaller #0 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+0x123/0x177 lib/dump_stack.c:118 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0x5/0x13 lib/fault-inject.c:149 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 __should_failslab+0xba/0xf0 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1558 slab_pre_alloc_hook mm/slab.h:424 [inline] slab_alloc mm/slab.c:3383 [inline] __do_kmalloc mm/slab.c:3725 [inline] __kmalloc+0x70/0x770 mm/slab.c:3736 kmalloc include/linux/slab.h:520 [inline] tty_buffer_alloc drivers/tty/tty_buffer.c:170 [inline] __tty_buffer_request_room+0x1b3/0x550 drivers/tty/tty_buffer.c:268 tty_insert_flip_string_fixed_flag+0x77/0x1a0 drivers/tty/tty_buffer.c:313 tty_insert_flip_string include/linux/tty_flip.h:37 [inline] pty_write+0xf3/0x200 drivers/tty/pty.c:122 tty_put_char+0x10d/0x130 drivers/tty/tty_io.c:2888 __process_echoes+0x311/0x790 drivers/tty/n_tty.c:726 flush_echoes drivers/tty/n_tty.c:827 [inline] __receive_buf drivers/tty/n_tty.c:1646 [inline] n_tty_receive_buf_common+0x780/0x2b80 drivers/tty/n_tty.c:1740 n_tty_receive_buf+0xc/0x10 drivers/tty/n_tty.c:1769 tiocsti drivers/tty/tty_io.c:2194 [inline] tty_ioctl+0x64e/0x12a0 drivers/tty/tty_io.c:2580 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x199/0x10d0 fs/ioctl.c:688 ksys_ioctl+0x62/0x90 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710 do_syscall_64+0xd6/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458c29 Code: ad b8 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 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ff61b60fc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007ff61b60fc90 RCX: 0000000000458c29 RDX: 0000000020000040 RSI: 0000000000005412 RDI: 0000000000000004 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff61b6106d4 R13: 00000000004c2d94 R14: 00000000004d5c98 R15: 0000000000000005 CPU: 0 PID: 7467 Comm: syz-executor.1 Not tainted 4.19.125-syzkaller #0 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+0x123/0x177 lib/dump_stack.c:118 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0x5/0x13 lib/fault-inject.c:149 __should_failslab+0xba/0xf0 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1558 slab_pre_alloc_hook mm/slab.h:424 [inline] slab_alloc mm/slab.c:3383 [inline] __do_kmalloc mm/slab.c:3725 [inline] __kmalloc+0x70/0x770 mm/slab.c:3736 kmalloc include/linux/slab.h:520 [inline] tty_buffer_alloc drivers/tty/tty_buffer.c:170 [inline] __tty_buffer_request_room+0x1b3/0x550 drivers/tty/tty_buffer.c:268 tty_insert_flip_string_fixed_flag+0x77/0x1a0 drivers/tty/tty_buffer.c:313 tty_insert_flip_string include/linux/tty_flip.h:37 [inline] pty_write+0xf3/0x200 drivers/tty/pty.c:122 tty_put_char+0x10d/0x130 drivers/tty/tty_io.c:2888 __process_echoes+0x311/0x790 drivers/tty/n_tty.c:726 flush_echoes drivers/tty/n_tty.c:827 [inline] __receive_buf drivers/tty/n_tty.c:1646 [inline] n_tty_receive_buf_common+0x780/0x2b80 drivers/tty/n_tty.c:1740 n_tty_receive_buf+0xc/0x10 drivers/tty/n_tty.c:1769 tiocsti drivers/tty/tty_io.c:2194 [inline] tty_ioctl+0x64e/0x12a0 drivers/tty/tty_io.c:2580 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x199/0x10d0 fs/ioctl.c:688 ksys_ioctl+0x62/0x90 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710 do_syscall_64+0xd6/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458c29 Code: ad b8 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 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f7fbadfdc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f7fbadfdc90 RCX: 0000000000458c29 RDX: 0000000020000040 RSI: 0000000000005412 RDI: 0000000000000004 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7fbadfe6d4 R13: 00000000004c2d94 R14: 00000000004d5c98 R15: 0000000000000005 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 7520 Comm: syz-executor.3 Not tainted 4.19.125-syzkaller #0 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+0x123/0x177 lib/dump_stack.c:118 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0x5/0x13 lib/fault-inject.c:149 __should_failslab+0xba/0xf0 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1558 slab_pre_alloc_hook mm/slab.h:424 [inline] slab_alloc mm/slab.c:3383 [inline] __do_kmalloc mm/slab.c:3725 [inline] __kmalloc+0x70/0x770 mm/slab.c:3736 kmalloc include/linux/slab.h:520 [inline] tty_buffer_alloc drivers/tty/tty_buffer.c:170 [inline] __tty_buffer_request_room+0x1b3/0x550 drivers/tty/tty_buffer.c:268 tty_insert_flip_string_fixed_flag+0x77/0x1a0 drivers/tty/tty_buffer.c:313 tty_insert_flip_string include/linux/tty_flip.h:37 [inline] pty_write+0xf3/0x200 drivers/tty/pty.c:122 tty_put_char+0x10d/0x130 drivers/tty/tty_io.c:2888 __process_echoes+0x311/0x790 drivers/tty/n_tty.c:726 flush_echoes drivers/tty/n_tty.c:827 [inline] __receive_buf drivers/tty/n_tty.c:1646 [inline] n_tty_receive_buf_common+0x780/0x2b80 drivers/tty/n_tty.c:1740 n_tty_receive_buf+0xc/0x10 drivers/tty/n_tty.c:1769 tiocsti drivers/tty/tty_io.c:2194 [inline] tty_ioctl+0x64e/0x12a0 drivers/tty/tty_io.c:2580 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x199/0x10d0 fs/ioctl.c:688 ksys_ioctl+0x62/0x90 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710 do_syscall_64+0xd6/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458c29 Code: ad b8 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 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f6d51465c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f6d51465c90 RCX: 0000000000458c29 RDX: 0000000020000040 RSI: 0000000000005412 RDI: 0000000000000004 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f6d514666d4 R13: 00000000004c2d94 R14: 00000000004d5c98 R15: 0000000000000005 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 7538 Comm: syz-executor.5 Not tainted 4.19.125-syzkaller #0 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+0x123/0x177 lib/dump_stack.c:118 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0x5/0x13 lib/fault-inject.c:149 __should_failslab+0xba/0xf0 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1558 slab_pre_alloc_hook mm/slab.h:424 [inline] slab_alloc mm/slab.c:3383 [inline] __do_kmalloc mm/slab.c:3725 [inline] __kmalloc+0x70/0x770 mm/slab.c:3736 kmalloc include/linux/slab.h:520 [inline] tty_buffer_alloc drivers/tty/tty_buffer.c:170 [inline] __tty_buffer_request_room+0x1b3/0x550 drivers/tty/tty_buffer.c:268 tty_insert_flip_string_fixed_flag+0x77/0x1a0 drivers/tty/tty_buffer.c:313 tty_insert_flip_string include/linux/tty_flip.h:37 [inline] pty_write+0xf3/0x200 drivers/tty/pty.c:122 tty_put_char+0x10d/0x130 drivers/tty/tty_io.c:2888 __process_echoes+0x311/0x790 drivers/tty/n_tty.c:726 flush_echoes drivers/tty/n_tty.c:827 [inline] __receive_buf drivers/tty/n_tty.c:1646 [inline] n_tty_receive_buf_common+0x780/0x2b80 drivers/tty/n_tty.c:1740 n_tty_receive_buf+0xc/0x10 drivers/tty/n_tty.c:1769 tiocsti drivers/tty/tty_io.c:2194 [inline] tty_ioctl+0x64e/0x12a0 drivers/tty/tty_io.c:2580 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x199/0x10d0 fs/ioctl.c:688 ksys_ioctl+0x62/0x90 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710 do_syscall_64+0xd6/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458c29 Code: ad b8 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 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f974d3a5c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f974d3a5c90 RCX: 0000000000458c29 RDX: 0000000020000040 RSI: 0000000000005412 RDI: 0000000000000004 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f974d3a66d4 R13: 00000000004c2d94 R14: 00000000004d5c98 R15: 0000000000000005 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 7568 Comm: syz-executor.2 Not tainted 4.19.125-syzkaller #0 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+0x123/0x177 lib/dump_stack.c:118 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0x5/0x13 lib/fault-inject.c:149 __should_failslab+0xba/0xf0 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1558 slab_pre_alloc_hook mm/slab.h:424 [inline] slab_alloc mm/slab.c:3383 [inline] __do_kmalloc mm/slab.c:3725 [inline] __kmalloc+0x70/0x770 mm/slab.c:3736 kmalloc include/linux/slab.h:520 [inline] tty_buffer_alloc drivers/tty/tty_buffer.c:170 [inline] __tty_buffer_request_room+0x1b3/0x550 drivers/tty/tty_buffer.c:268 tty_insert_flip_string_fixed_flag+0x77/0x1a0 drivers/tty/tty_buffer.c:313 tty_insert_flip_string include/linux/tty_flip.h:37 [inline] pty_write+0xf3/0x200 drivers/tty/pty.c:122 tty_put_char+0x10d/0x130 drivers/tty/tty_io.c:2888 __process_echoes+0x311/0x790 drivers/tty/n_tty.c:726 flush_echoes drivers/tty/n_tty.c:827 [inline] __receive_buf drivers/tty/n_tty.c:1646 [inline] n_tty_receive_buf_common+0x780/0x2b80 drivers/tty/n_tty.c:1740 n_tty_receive_buf+0xc/0x10 drivers/tty/n_tty.c:1769 tiocsti drivers/tty/tty_io.c:2194 [inline] tty_ioctl+0x64e/0x12a0 drivers/tty/tty_io.c:2580 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x199/0x10d0 fs/ioctl.c:688 ksys_ioctl+0x62/0x90 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710 do_syscall_64+0xd6/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458c29 Code: ad b8 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 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ff61b60fc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007ff61b60fc90 RCX: 0000000000458c29 RDX: 0000000020000040 RSI: 0000000000005412 RDI: 0000000000000004 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff61b6106d4 R13: 00000000004c2d94 R14: 00000000004d5c98 R15: 0000000000000005 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 7587 Comm: syz-executor.5 Not tainted 4.19.125-syzkaller #0 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+0x123/0x177 lib/dump_stack.c:118 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0x5/0x13 lib/fault-inject.c:149 __should_failslab+0xba/0xf0 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1558 slab_pre_alloc_hook mm/slab.h:424 [inline] slab_alloc mm/slab.c:3383 [inline] __do_kmalloc mm/slab.c:3725 [inline] __kmalloc+0x70/0x770 mm/slab.c:3736 kmalloc include/linux/slab.h:520 [inline] tty_buffer_alloc drivers/tty/tty_buffer.c:170 [inline] __tty_buffer_request_room+0x1b3/0x550 drivers/tty/tty_buffer.c:268 tty_insert_flip_string_fixed_flag+0x77/0x1a0 drivers/tty/tty_buffer.c:313 tty_insert_flip_string include/linux/tty_flip.h:37 [inline] pty_write+0xf3/0x200 drivers/tty/pty.c:122 tty_put_char+0x10d/0x130 drivers/tty/tty_io.c:2888 __process_echoes+0x311/0x790 drivers/tty/n_tty.c:726 flush_echoes drivers/tty/n_tty.c:827 [inline] __receive_buf drivers/tty/n_tty.c:1646 [inline] n_tty_receive_buf_common+0x780/0x2b80 drivers/tty/n_tty.c:1740 n_tty_receive_buf+0xc/0x10 drivers/tty/n_tty.c:1769 tiocsti drivers/tty/tty_io.c:2194 [inline] tty_ioctl+0x64e/0x12a0 drivers/tty/tty_io.c:2580 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x199/0x10d0 fs/ioctl.c:688 ksys_ioctl+0x62/0x90 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710 do_syscall_64+0xd6/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458c29 Code: ad b8 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 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f974d3a5c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f974d3a5c90 RCX: 0000000000458c29 RDX: 0000000020000040 RSI: 0000000000005412 RDI: 0000000000000004 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f974d3a66d4 R13: 00000000004c2d94 R14: 00000000004d5c98 R15: 0000000000000005 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 7638 Comm: syz-executor.3 Not tainted 4.19.125-syzkaller #0 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+0x123/0x177 lib/dump_stack.c:118 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0x5/0x13 lib/fault-inject.c:149 __should_failslab+0xba/0xf0 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1558 slab_pre_alloc_hook mm/slab.h:424 [inline] slab_alloc mm/slab.c:3383 [inline] __do_kmalloc mm/slab.c:3725 [inline] __kmalloc+0x70/0x770 mm/slab.c:3736 kmalloc include/linux/slab.h:520 [inline] tty_buffer_alloc drivers/tty/tty_buffer.c:170 [inline] __tty_buffer_request_room+0x1b3/0x550 drivers/tty/tty_buffer.c:268 tty_insert_flip_string_fixed_flag+0x77/0x1a0 drivers/tty/tty_buffer.c:313 tty_insert_flip_string include/linux/tty_flip.h:37 [inline] pty_write+0xf3/0x200 drivers/tty/pty.c:122 tty_put_char+0x10d/0x130 drivers/tty/tty_io.c:2888 __process_echoes+0x311/0x790 drivers/tty/n_tty.c:726 flush_echoes drivers/tty/n_tty.c:827 [inline] __receive_buf drivers/tty/n_tty.c:1646 [inline] n_tty_receive_buf_common+0x780/0x2b80 drivers/tty/n_tty.c:1740 n_tty_receive_buf+0xc/0x10 drivers/tty/n_tty.c:1769 tiocsti drivers/tty/tty_io.c:2194 [inline] tty_ioctl+0x64e/0x12a0 drivers/tty/tty_io.c:2580 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x199/0x10d0 fs/ioctl.c:688 ksys_ioctl+0x62/0x90 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710 do_syscall_64+0xd6/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458c29 Code: ad b8 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 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f6d51465c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f6d51465c90 RCX: 0000000000458c29 RDX: 0000000020000040 RSI: 0000000000005412 RDI: 0000000000000004 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f6d514666d4 R13: 00000000004c2d94 R14: 00000000004d5c98 R15: 0000000000000005 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: 7693 Comm: syz-executor.0 Not tainted 4.19.125-syzkaller #0 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+0x123/0x177 lib/dump_stack.c:118 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0x5/0x13 lib/fault-inject.c:149 __should_failslab+0xba/0xf0 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1558 slab_pre_alloc_hook mm/slab.h:424 [inline] slab_alloc mm/slab.c:3383 [inline] __do_kmalloc mm/slab.c:3725 [inline] __kmalloc+0x70/0x770 mm/slab.c:3736 kmalloc include/linux/slab.h:520 [inline] tty_buffer_alloc drivers/tty/tty_buffer.c:170 [inline] __tty_buffer_request_room+0x1b3/0x550 drivers/tty/tty_buffer.c:268 tty_insert_flip_string_fixed_flag+0x77/0x1a0 drivers/tty/tty_buffer.c:313 tty_insert_flip_string include/linux/tty_flip.h:37 [inline] pty_write+0xf3/0x200 drivers/tty/pty.c:122 tty_put_char+0x10d/0x130 drivers/tty/tty_io.c:2888 __process_echoes+0x311/0x790 drivers/tty/n_tty.c:726 flush_echoes drivers/tty/n_tty.c:827 [inline] __receive_buf drivers/tty/n_tty.c:1646 [inline] n_tty_receive_buf_common+0x780/0x2b80 drivers/tty/n_tty.c:1740 n_tty_receive_buf+0xc/0x10 drivers/tty/n_tty.c:1769 tiocsti drivers/tty/tty_io.c:2194 [inline] tty_ioctl+0x64e/0x12a0 drivers/tty/tty_io.c:2580 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x199/0x10d0 fs/ioctl.c:688 ksys_ioctl+0x62/0x90 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710 do_syscall_64+0xd6/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458c29 Code: ad b8 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 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f1ddedd9c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f1ddedd9c90 RCX: 0000000000458c29 RDX: 0000000020000040 RSI: 0000000000005412 RDI: 0000000000000004 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f1ddedda6d4 R13: 00000000004c2d94 R14: 00000000004d5c98 R15: 0000000000000005 CPU: 1 PID: 7696 Comm: syz-executor.3 Not tainted 4.19.125-syzkaller #0 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+0x123/0x177 lib/dump_stack.c:118 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0x5/0x13 lib/fault-inject.c:149 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 __should_failslab+0xba/0xf0 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1558 slab_pre_alloc_hook mm/slab.h:424 [inline] slab_alloc mm/slab.c:3383 [inline] __do_kmalloc mm/slab.c:3725 [inline] __kmalloc+0x70/0x770 mm/slab.c:3736 kmalloc include/linux/slab.h:520 [inline] tty_buffer_alloc drivers/tty/tty_buffer.c:170 [inline] __tty_buffer_request_room+0x1b3/0x550 drivers/tty/tty_buffer.c:268 tty_insert_flip_string_fixed_flag+0x77/0x1a0 drivers/tty/tty_buffer.c:313 tty_insert_flip_string include/linux/tty_flip.h:37 [inline] pty_write+0xf3/0x200 drivers/tty/pty.c:122 tty_put_char+0x10d/0x130 drivers/tty/tty_io.c:2888 __process_echoes+0x311/0x790 drivers/tty/n_tty.c:726 flush_echoes drivers/tty/n_tty.c:827 [inline] __receive_buf drivers/tty/n_tty.c:1646 [inline] n_tty_receive_buf_common+0x780/0x2b80 drivers/tty/n_tty.c:1740 n_tty_receive_buf+0xc/0x10 drivers/tty/n_tty.c:1769 tiocsti drivers/tty/tty_io.c:2194 [inline] tty_ioctl+0x64e/0x12a0 drivers/tty/tty_io.c:2580 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x199/0x10d0 fs/ioctl.c:688 ksys_ioctl+0x62/0x90 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710 do_syscall_64+0xd6/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458c29 Code: ad b8 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 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f6d51465c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f6d51465c90 RCX: 0000000000458c29 RDX: 0000000020000040 RSI: 0000000000005412 RDI: 0000000000000004 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f6d514666d4 R13: 00000000004c2d94 R14: 00000000004d5c98 R15: 0000000000000005 CPU: 0 PID: 7702 Comm: syz-executor.5 Not tainted 4.19.125-syzkaller #0 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+0x123/0x177 lib/dump_stack.c:118 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0x5/0x13 lib/fault-inject.c:149 __should_failslab+0xba/0xf0 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1558 slab_pre_alloc_hook mm/slab.h:424 [inline] slab_alloc mm/slab.c:3383 [inline] __do_kmalloc mm/slab.c:3725 [inline] __kmalloc+0x70/0x770 mm/slab.c:3736 kmalloc include/linux/slab.h:520 [inline] tty_buffer_alloc drivers/tty/tty_buffer.c:170 [inline] __tty_buffer_request_room+0x1b3/0x550 drivers/tty/tty_buffer.c:268 tty_insert_flip_string_fixed_flag+0x77/0x1a0 drivers/tty/tty_buffer.c:313 tty_insert_flip_string include/linux/tty_flip.h:37 [inline] pty_write+0xf3/0x200 drivers/tty/pty.c:122 tty_put_char+0x10d/0x130 drivers/tty/tty_io.c:2888 __process_echoes+0x311/0x790 drivers/tty/n_tty.c:726 flush_echoes drivers/tty/n_tty.c:827 [inline] __receive_buf drivers/tty/n_tty.c:1646 [inline] n_tty_receive_buf_common+0x780/0x2b80 drivers/tty/n_tty.c:1740 n_tty_receive_buf+0xc/0x10 drivers/tty/n_tty.c:1769 tiocsti drivers/tty/tty_io.c:2194 [inline] tty_ioctl+0x64e/0x12a0 drivers/tty/tty_io.c:2580 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x199/0x10d0 fs/ioctl.c:688 ksys_ioctl+0x62/0x90 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710 do_syscall_64+0xd6/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458c29 Code: ad b8 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 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f974d3a5c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f974d3a5c90 RCX: 0000000000458c29 RDX: 0000000020000040 RSI: 0000000000005412 RDI: 0000000000000004 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f974d3a66d4 R13: 00000000004c2d94 R14: 00000000004d5c98 R15: 0000000000000005 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 PID: 7747 Comm: syz-executor.0 Not tainted 4.19.125-syzkaller #0 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 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+0x123/0x177 lib/dump_stack.c:118 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0x5/0x13 lib/fault-inject.c:149 __should_failslab+0xba/0xf0 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1558 slab_pre_alloc_hook mm/slab.h:424 [inline] slab_alloc mm/slab.c:3383 [inline] __do_kmalloc mm/slab.c:3725 [inline] __kmalloc+0x70/0x770 mm/slab.c:3736 kmalloc include/linux/slab.h:520 [inline] tty_buffer_alloc drivers/tty/tty_buffer.c:170 [inline] __tty_buffer_request_room+0x1b3/0x550 drivers/tty/tty_buffer.c:268 tty_insert_flip_string_fixed_flag+0x77/0x1a0 drivers/tty/tty_buffer.c:313 tty_insert_flip_string include/linux/tty_flip.h:37 [inline] pty_write+0xf3/0x200 drivers/tty/pty.c:122 tty_put_char+0x10d/0x130 drivers/tty/tty_io.c:2888 __process_echoes+0x311/0x790 drivers/tty/n_tty.c:726 flush_echoes drivers/tty/n_tty.c:827 [inline] __receive_buf drivers/tty/n_tty.c:1646 [inline] n_tty_receive_buf_common+0x780/0x2b80 drivers/tty/n_tty.c:1740 n_tty_receive_buf+0xc/0x10 drivers/tty/n_tty.c:1769 tiocsti drivers/tty/tty_io.c:2194 [inline] tty_ioctl+0x64e/0x12a0 drivers/tty/tty_io.c:2580 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x199/0x10d0 fs/ioctl.c:688 ksys_ioctl+0x62/0x90 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710 do_syscall_64+0xd6/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458c29 Code: ad b8 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 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f1ddedd9c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f1ddedd9c90 RCX: 0000000000458c29 RDX: 0000000020000040 RSI: 0000000000005412 RDI: 0000000000000004 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f1ddedda6d4 R13: 00000000004c2d94 R14: 00000000004d5c98 R15: 0000000000000005 CPU: 0 PID: 7755 Comm: syz-executor.3 Not tainted 4.19.125-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x123/0x177 lib/dump_stack.c:118 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0x5/0x13 lib/fault-inject.c:149 __should_failslab+0xba/0xf0 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1558 slab_pre_alloc_hook mm/slab.h:424 [inline] slab_alloc mm/slab.c:3383 [inline] __do_kmalloc mm/slab.c:3725 [inline] __kmalloc+0x70/0x770 mm/slab.c:3736 kmalloc include/linux/slab.h:520 [inline] tty_buffer_alloc drivers/tty/tty_buffer.c:170 [inline] __tty_buffer_request_room+0x1b3/0x550 drivers/tty/tty_buffer.c:268 tty_insert_flip_string_fixed_flag+0x77/0x1a0 drivers/tty/tty_buffer.c:313 tty_insert_flip_string include/linux/tty_flip.h:37 [inline] pty_write+0xf3/0x200 drivers/tty/pty.c:122 tty_put_char+0x10d/0x130 drivers/tty/tty_io.c:2888 __process_echoes+0x311/0x790 drivers/tty/n_tty.c:726 flush_echoes drivers/tty/n_tty.c:827 [inline] __receive_buf drivers/tty/n_tty.c:1646 [inline] n_tty_receive_buf_common+0x780/0x2b80 drivers/tty/n_tty.c:1740 n_tty_receive_buf+0xc/0x10 drivers/tty/n_tty.c:1769 tiocsti drivers/tty/tty_io.c:2194 [inline] tty_ioctl+0x64e/0x12a0 drivers/tty/tty_io.c:2580 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x199/0x10d0 fs/ioctl.c:688 ksys_ioctl+0x62/0x90 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710 do_syscall_64+0xd6/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458c29 Code: ad b8 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 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f6d51465c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f6d51465c90 RCX: 0000000000458c29 RDX: 0000000020000040 RSI: 0000000000005412 RDI: 0000000000000004 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f6d514666d4 R13: 00000000004c2d94 R14: 00000000004d5c98 R15: 0000000000000005 CPU: 1 PID: 7758 Comm: syz-executor.1 Not tainted 4.19.125-syzkaller #0 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+0x123/0x177 lib/dump_stack.c:118 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0x5/0x13 lib/fault-inject.c:149 __should_failslab+0xba/0xf0 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1558 slab_pre_alloc_hook mm/slab.h:424 [inline] slab_alloc mm/slab.c:3383 [inline] __do_kmalloc mm/slab.c:3725 [inline] __kmalloc+0x70/0x770 mm/slab.c:3736 kmalloc include/linux/slab.h:520 [inline] tty_buffer_alloc drivers/tty/tty_buffer.c:170 [inline] __tty_buffer_request_room+0x1b3/0x550 drivers/tty/tty_buffer.c:268 tty_insert_flip_string_fixed_flag+0x77/0x1a0 drivers/tty/tty_buffer.c:313 tty_insert_flip_string include/linux/tty_flip.h:37 [inline] pty_write+0xf3/0x200 drivers/tty/pty.c:122 tty_put_char+0x10d/0x130 drivers/tty/tty_io.c:2888 __process_echoes+0x311/0x790 drivers/tty/n_tty.c:726 flush_echoes drivers/tty/n_tty.c:827 [inline] __receive_buf drivers/tty/n_tty.c:1646 [inline] n_tty_receive_buf_common+0x780/0x2b80 drivers/tty/n_tty.c:1740 n_tty_receive_buf+0xc/0x10 drivers/tty/n_tty.c:1769 tiocsti drivers/tty/tty_io.c:2194 [inline] tty_ioctl+0x64e/0x12a0 drivers/tty/tty_io.c:2580 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x199/0x10d0 fs/ioctl.c:688 ksys_ioctl+0x62/0x90 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710 do_syscall_64+0xd6/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458c29 Code: ad b8 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 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f7fbadfdc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f7fbadfdc90 RCX: 0000000000458c29 RDX: 0000000020000040 RSI: 0000000000005412 RDI: 0000000000000004 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7fbadfe6d4 R13: 00000000004c2d94 R14: 00000000004d5c98 R15: 0000000000000005 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 7915 Comm: syz-executor.3 Not tainted 4.19.125-syzkaller #0 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+0x123/0x177 lib/dump_stack.c:118 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0x5/0x13 lib/fault-inject.c:149 __should_failslab+0xba/0xf0 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1558 slab_pre_alloc_hook mm/slab.h:424 [inline] slab_alloc mm/slab.c:3383 [inline] __do_kmalloc mm/slab.c:3725 [inline] __kmalloc+0x70/0x770 mm/slab.c:3736 kmalloc include/linux/slab.h:520 [inline] tty_buffer_alloc drivers/tty/tty_buffer.c:170 [inline] __tty_buffer_request_room+0x1b3/0x550 drivers/tty/tty_buffer.c:268 tty_insert_flip_string_fixed_flag+0x77/0x1a0 drivers/tty/tty_buffer.c:313 tty_insert_flip_string include/linux/tty_flip.h:37 [inline] pty_write+0xf3/0x200 drivers/tty/pty.c:122 tty_put_char+0x10d/0x130 drivers/tty/tty_io.c:2888 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 __process_echoes+0x311/0x790 drivers/tty/n_tty.c:726 flush_echoes drivers/tty/n_tty.c:827 [inline] __receive_buf drivers/tty/n_tty.c:1646 [inline] n_tty_receive_buf_common+0x780/0x2b80 drivers/tty/n_tty.c:1740 n_tty_receive_buf+0xc/0x10 drivers/tty/n_tty.c:1769 tiocsti drivers/tty/tty_io.c:2194 [inline] tty_ioctl+0x64e/0x12a0 drivers/tty/tty_io.c:2580 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x199/0x10d0 fs/ioctl.c:688 ksys_ioctl+0x62/0x90 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710 do_syscall_64+0xd6/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458c29 Code: ad b8 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 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f6d51465c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f6d51465c90 RCX: 0000000000458c29 RDX: 0000000020000040 RSI: 0000000000005412 RDI: 0000000000000004 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f6d514666d4 R13: 00000000004c2d94 R14: 00000000004d5c98 R15: 0000000000000005 CPU: 1 PID: 7913 Comm: syz-executor.5 Not tainted 4.19.125-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x123/0x177 lib/dump_stack.c:118 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0x5/0x13 lib/fault-inject.c:149 __should_failslab+0xba/0xf0 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1558 slab_pre_alloc_hook mm/slab.h:424 [inline] slab_alloc mm/slab.c:3383 [inline] __do_kmalloc mm/slab.c:3725 [inline] __kmalloc+0x70/0x770 mm/slab.c:3736 kmalloc include/linux/slab.h:520 [inline] tty_buffer_alloc drivers/tty/tty_buffer.c:170 [inline] __tty_buffer_request_room+0x1b3/0x550 drivers/tty/tty_buffer.c:268 tty_insert_flip_string_fixed_flag+0x77/0x1a0 drivers/tty/tty_buffer.c:313 tty_insert_flip_string include/linux/tty_flip.h:37 [inline] pty_write+0xf3/0x200 drivers/tty/pty.c:122 tty_put_char+0x10d/0x130 drivers/tty/tty_io.c:2888 __process_echoes+0x311/0x790 drivers/tty/n_tty.c:726 flush_echoes drivers/tty/n_tty.c:827 [inline] __receive_buf drivers/tty/n_tty.c:1646 [inline] n_tty_receive_buf_common+0x780/0x2b80 drivers/tty/n_tty.c:1740 n_tty_receive_buf+0xc/0x10 drivers/tty/n_tty.c:1769 tiocsti drivers/tty/tty_io.c:2194 [inline] tty_ioctl+0x64e/0x12a0 drivers/tty/tty_io.c:2580 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x199/0x10d0 fs/ioctl.c:688 ksys_ioctl+0x62/0x90 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710 do_syscall_64+0xd6/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458c29 Code: ad b8 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 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f974d3a5c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f974d3a5c90 RCX: 0000000000458c29 RDX: 0000000020000040 RSI: 0000000000005412 RDI: 0000000000000004 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f974d3a66d4 R13: 00000000004c2d94 R14: 00000000004d5c98 R15: 0000000000000005 CPU: 0 PID: 7937 Comm: syz-executor.2 Not tainted 4.19.125-syzkaller #0 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+0x123/0x177 lib/dump_stack.c:118 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0x5/0x13 lib/fault-inject.c:149 __should_failslab+0xba/0xf0 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1558 slab_pre_alloc_hook mm/slab.h:424 [inline] slab_alloc mm/slab.c:3383 [inline] __do_kmalloc mm/slab.c:3725 [inline] __kmalloc+0x70/0x770 mm/slab.c:3736 kmalloc include/linux/slab.h:520 [inline] tty_buffer_alloc drivers/tty/tty_buffer.c:170 [inline] __tty_buffer_request_room+0x1b3/0x550 drivers/tty/tty_buffer.c:268 tty_insert_flip_string_fixed_flag+0x77/0x1a0 drivers/tty/tty_buffer.c:313 tty_insert_flip_string include/linux/tty_flip.h:37 [inline] pty_write+0xf3/0x200 drivers/tty/pty.c:122 tty_put_char+0x10d/0x130 drivers/tty/tty_io.c:2888 __process_echoes+0x311/0x790 drivers/tty/n_tty.c:726 flush_echoes drivers/tty/n_tty.c:827 [inline] __receive_buf drivers/tty/n_tty.c:1646 [inline] n_tty_receive_buf_common+0x780/0x2b80 drivers/tty/n_tty.c:1740 n_tty_receive_buf+0xc/0x10 drivers/tty/n_tty.c:1769 tiocsti drivers/tty/tty_io.c:2194 [inline] tty_ioctl+0x64e/0x12a0 drivers/tty/tty_io.c:2580 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x199/0x10d0 fs/ioctl.c:688 ksys_ioctl+0x62/0x90 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710 do_syscall_64+0xd6/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458c29 Code: ad b8 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 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ff61b60fc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007ff61b60fc90 RCX: 0000000000458c29 RDX: 0000000020000040 RSI: 0000000000005412 RDI: 0000000000000004 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff61b6106d4 R13: 00000000004c2d94 R14: 00000000004d5c98 R15: 0000000000000005 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 7949 Comm: syz-executor.4 Not tainted 4.19.125-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x123/0x177 lib/dump_stack.c:118 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0x5/0x13 lib/fault-inject.c:149 __should_failslab+0xba/0xf0 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1558 slab_pre_alloc_hook mm/slab.h:424 [inline] slab_alloc mm/slab.c:3383 [inline] __do_kmalloc mm/slab.c:3725 [inline] __kmalloc+0x70/0x770 mm/slab.c:3736 kmalloc include/linux/slab.h:520 [inline] tty_buffer_alloc drivers/tty/tty_buffer.c:170 [inline] __tty_buffer_request_room+0x1b3/0x550 drivers/tty/tty_buffer.c:268 tty_insert_flip_string_fixed_flag+0x77/0x1a0 drivers/tty/tty_buffer.c:313 tty_insert_flip_string include/linux/tty_flip.h:37 [inline] pty_write+0xf3/0x200 drivers/tty/pty.c:122 tty_put_char+0x10d/0x130 drivers/tty/tty_io.c:2888 __process_echoes+0x311/0x790 drivers/tty/n_tty.c:726 flush_echoes drivers/tty/n_tty.c:827 [inline] __receive_buf drivers/tty/n_tty.c:1646 [inline] n_tty_receive_buf_common+0x780/0x2b80 drivers/tty/n_tty.c:1740 n_tty_receive_buf+0xc/0x10 drivers/tty/n_tty.c:1769 tiocsti drivers/tty/tty_io.c:2194 [inline] tty_ioctl+0x64e/0x12a0 drivers/tty/tty_io.c:2580 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x199/0x10d0 fs/ioctl.c:688 ksys_ioctl+0x62/0x90 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710 do_syscall_64+0xd6/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458c29 Code: ad b8 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 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fc56dfb2c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fc56dfb2c90 RCX: 0000000000458c29 RDX: 0000000020000040 RSI: 0000000000005412 RDI: 0000000000000004 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc56dfb36d4 R13: 00000000004c2d94 R14: 00000000004d5c98 R15: 0000000000000005 CPU: 1 PID: 7954 Comm: syz-executor.3 Not tainted 4.19.125-syzkaller #0 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+0x123/0x177 lib/dump_stack.c:118 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0x5/0x13 lib/fault-inject.c:149 __should_failslab+0xba/0xf0 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1558 slab_pre_alloc_hook mm/slab.h:424 [inline] slab_alloc mm/slab.c:3383 [inline] __do_kmalloc mm/slab.c:3725 [inline] __kmalloc+0x70/0x770 mm/slab.c:3736 kmalloc include/linux/slab.h:520 [inline] tty_buffer_alloc drivers/tty/tty_buffer.c:170 [inline] __tty_buffer_request_room+0x1b3/0x550 drivers/tty/tty_buffer.c:268 tty_insert_flip_string_fixed_flag+0x77/0x1a0 drivers/tty/tty_buffer.c:313 tty_insert_flip_string include/linux/tty_flip.h:37 [inline] pty_write+0xf3/0x200 drivers/tty/pty.c:122 tty_put_char+0x10d/0x130 drivers/tty/tty_io.c:2888 __process_echoes+0x311/0x790 drivers/tty/n_tty.c:726 flush_echoes drivers/tty/n_tty.c:827 [inline] __receive_buf drivers/tty/n_tty.c:1646 [inline] n_tty_receive_buf_common+0x780/0x2b80 drivers/tty/n_tty.c:1740 n_tty_receive_buf+0xc/0x10 drivers/tty/n_tty.c:1769 tiocsti drivers/tty/tty_io.c:2194 [inline] tty_ioctl+0x64e/0x12a0 drivers/tty/tty_io.c:2580 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x199/0x10d0 fs/ioctl.c:688 ksys_ioctl+0x62/0x90 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710 do_syscall_64+0xd6/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458c29 Code: ad b8 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 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f6d51465c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f6d51465c90 RCX: 0000000000458c29 RDX: 0000000020000040 RSI: 0000000000005412 RDI: 0000000000000004 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f6d514666d4 R13: 00000000004c2d94 R14: 00000000004d5c98 R15: 0000000000000005 CPU: 0 PID: 7959 Comm: syz-executor.1 Not tainted 4.19.125-syzkaller #0 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+0x123/0x177 lib/dump_stack.c:118 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0x5/0x13 lib/fault-inject.c:149 __should_failslab+0xba/0xf0 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1558 slab_pre_alloc_hook mm/slab.h:424 [inline] slab_alloc mm/slab.c:3383 [inline] __do_kmalloc mm/slab.c:3725 [inline] __kmalloc+0x70/0x770 mm/slab.c:3736 kmalloc include/linux/slab.h:520 [inline] tty_buffer_alloc drivers/tty/tty_buffer.c:170 [inline] __tty_buffer_request_room+0x1b3/0x550 drivers/tty/tty_buffer.c:268 tty_insert_flip_string_fixed_flag+0x77/0x1a0 drivers/tty/tty_buffer.c:313 tty_insert_flip_string include/linux/tty_flip.h:37 [inline] pty_write+0xf3/0x200 drivers/tty/pty.c:122 tty_put_char+0x10d/0x130 drivers/tty/tty_io.c:2888 __process_echoes+0x311/0x790 drivers/tty/n_tty.c:726 flush_echoes drivers/tty/n_tty.c:827 [inline] __receive_buf drivers/tty/n_tty.c:1646 [inline] n_tty_receive_buf_common+0x780/0x2b80 drivers/tty/n_tty.c:1740 n_tty_receive_buf+0xc/0x10 drivers/tty/n_tty.c:1769 tiocsti drivers/tty/tty_io.c:2194 [inline] tty_ioctl+0x64e/0x12a0 drivers/tty/tty_io.c:2580 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x199/0x10d0 fs/ioctl.c:688 ksys_ioctl+0x62/0x90 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710 do_syscall_64+0xd6/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 RIP: 0033:0x458c29 Code: ad b8 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 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f7fbadfdc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f7fbadfdc90 RCX: 0000000000458c29 RDX: 0000000020000040 RSI: 0000000000005412 RDI: 0000000000000004 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7fbadfe6d4 R13: 00000000004c2d94 R14: 00000000004d5c98 R15: 0000000000000005 CPU: 1 PID: 7958 Comm: syz-executor.2 Not tainted 4.19.125-syzkaller #0 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+0x123/0x177 lib/dump_stack.c:118 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0x5/0x13 lib/fault-inject.c:149 __should_failslab+0xba/0xf0 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1558 slab_pre_alloc_hook mm/slab.h:424 [inline] slab_alloc mm/slab.c:3383 [inline] __do_kmalloc mm/slab.c:3725 [inline] __kmalloc+0x70/0x770 mm/slab.c:3736 kmalloc include/linux/slab.h:520 [inline] tty_buffer_alloc drivers/tty/tty_buffer.c:170 [inline] __tty_buffer_request_room+0x1b3/0x550 drivers/tty/tty_buffer.c:268 tty_insert_flip_string_fixed_flag+0x77/0x1a0 drivers/tty/tty_buffer.c:313 tty_insert_flip_string include/linux/tty_flip.h:37 [inline] pty_write+0xf3/0x200 drivers/tty/pty.c:122 tty_put_char+0x10d/0x130 drivers/tty/tty_io.c:2888 __process_echoes+0x311/0x790 drivers/tty/n_tty.c:726 flush_echoes drivers/tty/n_tty.c:827 [inline] __receive_buf drivers/tty/n_tty.c:1646 [inline] n_tty_receive_buf_common+0x780/0x2b80 drivers/tty/n_tty.c:1740 n_tty_receive_buf+0xc/0x10 drivers/tty/n_tty.c:1769 tiocsti drivers/tty/tty_io.c:2194 [inline] tty_ioctl+0x64e/0x12a0 drivers/tty/tty_io.c:2580