RBP: 00007f8cd00ee1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007fff527ce1df R14: 00007f8cd00ee300 R15: 0000000000022000
======================================================
WARNING: possible circular locking dependency detected
5.10.60 #1 Not tainted
------------------------------------------------------
syz-executor.0/19768 is trying to acquire lock:
ffffffff84d0a920 (console_owner){-.-.}-{0:0}, at: console_unlock+0x2e1/0xb30 kernel/printk/printk.c:2498

but task is already holding lock:
ffff8880478be958 (&port->lock){-.-.}-{2:2}, at: pty_write+0xf4/0x1f0 drivers/tty/pty.c:120

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #2 (&port->lock){-.-.}-{2:2}:
       __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
       _raw_spin_lock_irqsave+0x36/0x50 kernel/locking/spinlock.c:159
       tty_port_tty_get+0x1f/0x100 drivers/tty/tty_port.c:288
       tty_port_default_wakeup+0x11/0x40 drivers/tty/tty_port.c:47
       serial8250_tx_chars+0x516/0xac0 drivers/tty/serial/8250/8250_port.c:1850
       serial8250_handle_irq.part.0+0x2d9/0x4d0 drivers/tty/serial/8250/8250_port.c:1937
       serial8250_handle_irq drivers/tty/serial/8250/8250_port.c:1910 [inline]
       serial8250_default_handle_irq+0xb8/0x230 drivers/tty/serial/8250/8250_port.c:1953
       serial8250_interrupt+0xf4/0x1a0 drivers/tty/serial/8250/8250_core.c:126
       __handle_irq_event_percpu+0x2ef/0x820 kernel/irq/handle.c:156
       handle_irq_event_percpu kernel/irq/handle.c:196 [inline]
       handle_irq_event+0x102/0x290 kernel/irq/handle.c:213
       handle_edge_irq+0x249/0xd00 kernel/irq/chip.c:822
       asm_call_irq_on_stack+0x12/0x20
       __run_irq_on_irqstack arch/x86/include/asm/irq_stack.h:48 [inline]
       run_irq_on_irqstack_cond arch/x86/include/asm/irq_stack.h:101 [inline]
       handle_irq arch/x86/kernel/irq.c:230 [inline]
       __common_interrupt arch/x86/kernel/irq.c:249 [inline]
       common_interrupt+0xdd/0x190 arch/x86/kernel/irq.c:239
       asm_common_interrupt+0x1e/0x40 arch/x86/include/asm/idtentry.h:626
       native_safe_halt arch/x86/include/asm/irqflags.h:60 [inline]
       arch_safe_halt arch/x86/include/asm/irqflags.h:103 [inline]
       default_idle+0xe/0x10 arch/x86/kernel/process.c:688
       default_idle_call+0x87/0xd0 kernel/sched/idle.c:112
       cpuidle_idle_call kernel/sched/idle.c:194 [inline]
       do_idle+0x3a5/0x510 kernel/sched/idle.c:300
       cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:396
       secondary_startup_64_no_verify+0xc2/0xcb

-> #1 (&port_lock_key){-.-.}-{2:2}:
       __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
       _raw_spin_lock_irqsave+0x36/0x50 kernel/locking/spinlock.c:159
       serial8250_console_write+0x8e2/0xb20 drivers/tty/serial/8250/8250_port.c:3323
       call_console_drivers kernel/printk/printk.c:1909 [inline]
       console_unlock+0x823/0xb30 kernel/printk/printk.c:2523
       register_console kernel/printk/printk.c:2864 [inline]
       register_console+0x523/0x800 kernel/printk/printk.c:2754
       univ8250_console_init+0x3a/0x46 drivers/tty/serial/8250/8250_core.c:690
       console_init+0x361/0x4fa kernel/printk/printk.c:2974
       start_kernel+0x2ed/0x496 init/main.c:984
       secondary_startup_64_no_verify+0xc2/0xcb

-> #0 (console_owner){-.-.}-{0:0}:
       check_prev_add kernel/locking/lockdep.c:2985 [inline]
       check_prevs_add kernel/locking/lockdep.c:3110 [inline]
       validate_chain kernel/locking/lockdep.c:3725 [inline]
       __lock_acquire+0x29fd/0x5b60 kernel/locking/lockdep.c:4950
       lock_acquire kernel/locking/lockdep.c:5560 [inline]
       lock_acquire+0x197/0x490 kernel/locking/lockdep.c:5525
       console_lock_spinning_enable kernel/printk/printk.c:1761 [inline]
       console_unlock+0x360/0xb30 kernel/printk/printk.c:2520
       vprintk_emit+0x1da/0x4d0 kernel/printk/printk.c:2052
       vprintk_func+0x8b/0x140 kernel/printk/printk_safe.c:401
       printk+0xba/0xed kernel/printk/printk.c:2100
       fail_dump lib/fault-inject.c:45 [inline]
       should_fail+0x470/0x590 lib/fault-inject.c:146
       should_failslab+0x5/0x10 mm/slab_common.c:1193
       slab_pre_alloc_hook mm/slab.h:515 [inline]
       slab_alloc_node mm/slub.c:2814 [inline]
       slab_alloc mm/slub.c:2897 [inline]
       __kmalloc+0x72/0x3e0 mm/slub.c:3958
       kmalloc include/linux/slab.h:557 [inline]
       tty_buffer_alloc+0x23f/0x2a0 drivers/tty/tty_buffer.c:175
       __tty_buffer_request_room+0x156/0x2a0 drivers/tty/tty_buffer.c:273
       tty_insert_flip_string_fixed_flag+0x8d/0x250 drivers/tty/tty_buffer.c:318
       tty_insert_flip_string include/linux/tty_flip.h:37 [inline]
       pty_write+0x126/0x1f0 drivers/tty/pty.c:122
       tty_put_char+0x129/0x150 drivers/tty/tty_io.c:3123
       __process_echoes+0x57c/0x9f0 drivers/tty/n_tty.c:723
       process_echoes+0xf9/0x1c0 drivers/tty/n_tty.c:806
       n_tty_set_termios+0x740/0xff0 drivers/tty/n_tty.c:1865
       tty_set_termios+0x5f1/0x840 drivers/tty/tty_ioctl.c:341
       set_termios.part.0+0x2c4/0x4d0 drivers/tty/tty_ioctl.c:414
       set_termios drivers/tty/tty_ioctl.c:368 [inline]
       tty_mode_ioctl+0xd67/0xef0 drivers/tty/tty_ioctl.c:702
       n_tty_ioctl_helper+0x55/0x3a0 drivers/tty/tty_ioctl.c:883
       n_tty_ioctl+0x7f/0x370 drivers/tty/n_tty.c:2482
       tty_ioctl+0x819/0x1600 drivers/tty/tty_io.c:2751
       vfs_ioctl fs/ioctl.c:48 [inline]
       __do_sys_ioctl fs/ioctl.c:753 [inline]
       __se_sys_ioctl fs/ioctl.c:739 [inline]
       __x64_sys_ioctl+0x196/0x210 fs/ioctl.c:739
       do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46
       entry_SYSCALL_64_after_hwframe+0x44/0xa9

other info that might help us debug this:

Chain exists of:
  console_owner --> &port_lock_key --> &port->lock

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&port->lock);
                               lock(&port_lock_key);
                               lock(&port->lock);
  lock(console_owner);

 *** DEADLOCK ***

6 locks held by syz-executor.0/19768:
 #0: ffff888043f20098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:266
 #1: ffff888043f232e8 (&o_tty->termios_rwsem/1){++++}-{3:3}, at: tty_set_termios+0xec/0x840 drivers/tty/tty_ioctl.c:328
 #2: ffff888043f23098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref+0x1d/0x80 drivers/tty/tty_ldisc.c:287
 #3: ffffc90000771378 (&ldata->output_lock){+.+.}-{3:3}, at: process_echoes+0xaf/0x1c0 drivers/tty/n_tty.c:804
 #4: ffff8880478be958 (&port->lock){-.-.}-{2:2}, at: pty_write+0xf4/0x1f0 drivers/tty/pty.c:120
 #5: ffffffff84deaca0 (console_lock){+.+.}-{0:0}, at: vprintk_func+0x8b/0x140 kernel/printk/printk_safe.c:401

stack backtrace:
CPU: 0 PID: 19768 Comm: syz-executor.0 Not tainted 5.10.60 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x107/0x163 lib/dump_stack.c:118
 check_noncircular+0x268/0x310 kernel/locking/lockdep.c:2120
 check_prev_add kernel/locking/lockdep.c:2985 [inline]
 check_prevs_add kernel/locking/lockdep.c:3110 [inline]
 validate_chain kernel/locking/lockdep.c:3725 [inline]
 __lock_acquire+0x29fd/0x5b60 kernel/locking/lockdep.c:4950
 lock_acquire kernel/locking/lockdep.c:5560 [inline]
 lock_acquire+0x197/0x490 kernel/locking/lockdep.c:5525
 console_lock_spinning_enable kernel/printk/printk.c:1761 [inline]
 console_unlock+0x360/0xb30 kernel/printk/printk.c:2520
 vprintk_emit+0x1da/0x4d0 kernel/printk/printk.c:2052
 vprintk_func+0x8b/0x140 kernel/printk/printk_safe.c:401
 printk+0xba/0xed kernel/printk/printk.c:2100
 fail_dump lib/fault-inject.c:45 [inline]
 should_fail+0x470/0x590 lib/fault-inject.c:146
 should_failslab+0x5/0x10 mm/slab_common.c:1193
 slab_pre_alloc_hook mm/slab.h:515 [inline]
 slab_alloc_node mm/slub.c:2814 [inline]
 slab_alloc mm/slub.c:2897 [inline]
 __kmalloc+0x72/0x3e0 mm/slub.c:3958
 kmalloc include/linux/slab.h:557 [inline]
 tty_buffer_alloc+0x23f/0x2a0 drivers/tty/tty_buffer.c:175
 __tty_buffer_request_room+0x156/0x2a0 drivers/tty/tty_buffer.c:273
 tty_insert_flip_string_fixed_flag+0x8d/0x250 drivers/tty/tty_buffer.c:318
 tty_insert_flip_string include/linux/tty_flip.h:37 [inline]
 pty_write+0x126/0x1f0 drivers/tty/pty.c:122
 tty_put_char+0x129/0x150 drivers/tty/tty_io.c:3123
 __process_echoes+0x57c/0x9f0 drivers/tty/n_tty.c:723
 process_echoes+0xf9/0x1c0 drivers/tty/n_tty.c:806
 n_tty_set_termios+0x740/0xff0 drivers/tty/n_tty.c:1865
 tty_set_termios+0x5f1/0x840 drivers/tty/tty_ioctl.c:341
 set_termios.part.0+0x2c4/0x4d0 drivers/tty/tty_ioctl.c:414
 set_termios drivers/tty/tty_ioctl.c:368 [inline]
 tty_mode_ioctl+0xd67/0xef0 drivers/tty/tty_ioctl.c:702
 n_tty_ioctl_helper+0x55/0x3a0 drivers/tty/tty_ioctl.c:883
 n_tty_ioctl+0x7f/0x370 drivers/tty/n_tty.c:2482
 tty_ioctl+0x819/0x1600 drivers/tty/tty_io.c:2751
 vfs_ioctl fs/ioctl.c:48 [inline]
 __do_sys_ioctl fs/ioctl.c:753 [inline]
 __se_sys_ioctl fs/ioctl.c:739 [inline]
 __x64_sys_ioctl+0x196/0x210 fs/ioctl.c:739
 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x466609
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f8cd00ee188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 0000000000466609
RDX: 0000000020000280 RSI: 0000000000005403 RDI: 0000000000000003
RBP: 00007f8cd00ee1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007fff527ce1df R14: 00007f8cd00ee300 R15: 0000000000022000
FAULT_INJECTION: forcing a failure.
name fail_usercopy, interval 1, probability 0, space 0, times 0
CPU: 1 PID: 19956 Comm: syz-executor.2 Not tainted 5.10.60 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x107/0x163 lib/dump_stack.c:118
 fail_dump lib/fault-inject.c:52 [inline]
 should_fail.cold+0x5/0xa lib/fault-inject.c:146
 copyout lib/iov_iter.c:144 [inline]
 _copy_to_iter+0x25b/0x1060 lib/iov_iter.c:637
 copy_to_iter include/linux/uio.h:137 [inline]
 iterate_tty_read drivers/tty/tty_io.c:878 [inline]
 tty_read+0x2a9/0x5e0 drivers/tty/tty_io.c:935
 call_read_iter include/linux/fs.h:1897 [inline]
 new_sync_read+0x41f/0x6e0 fs/read_write.c:415
 vfs_read+0x451/0x580 fs/read_write.c:496
 ksys_read+0x12d/0x250 fs/read_write.c:634
 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x466609
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f953684a188 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 0000000000466609
RDX: 0000000000000092 RSI: 0000000020000100 RDI: 0000000000000003
RBP: 00007f953684a1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffd2c75709f R14: 00007f953684a300 R15: 0000000000022000
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 1 PID: 20296 Comm: syz-executor.0 Not tainted 5.10.60 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x107/0x163 lib/dump_stack.c:118
 fail_dump lib/fault-inject.c:52 [inline]
 should_fail.cold+0x5/0xa lib/fault-inject.c:146
 should_failslab+0x5/0x10 mm/slab_common.c:1193
 slab_pre_alloc_hook mm/slab.h:515 [inline]
 slab_alloc_node mm/slub.c:2814 [inline]
 slab_alloc mm/slub.c:2897 [inline]
 kmem_cache_alloc+0x5b/0x350 mm/slub.c:2902
 mem_pool_alloc mm/kmemleak.c:423 [inline]
 create_object.isra.0+0x3a/0xa10 mm/kmemleak.c:578
 kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
 slab_post_alloc_hook mm/slab.h:534 [inline]
 slab_alloc_node mm/slub.c:2889 [inline]
 slab_alloc mm/slub.c:2897 [inline]
 __kmalloc+0x170/0x3e0 mm/slub.c:3958
 kmalloc include/linux/slab.h:557 [inline]
 tty_buffer_alloc+0x23f/0x2a0 drivers/tty/tty_buffer.c:175
 __tty_buffer_request_room+0x156/0x2a0 drivers/tty/tty_buffer.c:273
 tty_insert_flip_string_fixed_flag+0x8d/0x250 drivers/tty/tty_buffer.c:318
 tty_insert_flip_string include/linux/tty_flip.h:37 [inline]
 pty_write+0x126/0x1f0 drivers/tty/pty.c:122
 tty_put_char+0x129/0x150 drivers/tty/tty_io.c:3123
 __process_echoes+0x57c/0x9f0 drivers/tty/n_tty.c:723
 process_echoes+0xf9/0x1c0 drivers/tty/n_tty.c:806
 n_tty_set_termios+0x740/0xff0 drivers/tty/n_tty.c:1865
 tty_set_termios+0x5f1/0x840 drivers/tty/tty_ioctl.c:341
 set_termios.part.0+0x2c4/0x4d0 drivers/tty/tty_ioctl.c:414
 set_termios drivers/tty/tty_ioctl.c:368 [inline]
 tty_mode_ioctl+0xd67/0xef0 drivers/tty/tty_ioctl.c:702
 n_tty_ioctl_helper+0x55/0x3a0 drivers/tty/tty_ioctl.c:883
 n_tty_ioctl+0x7f/0x370 drivers/tty/n_tty.c:2482
 tty_ioctl+0x819/0x1600 drivers/tty/tty_io.c:2751
 vfs_ioctl fs/ioctl.c:48 [inline]
 __do_sys_ioctl fs/ioctl.c:753 [inline]
 __se_sys_ioctl fs/ioctl.c:739 [inline]
 __x64_sys_ioctl+0x196/0x210 fs/ioctl.c:739
 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x466609
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f8cd00ee188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 0000000000466609
RDX: 0000000020000280 RSI: 0000000000005403 RDI: 0000000000000003
RBP: 00007f8cd00ee1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007fff527ce1df R14: 00007f8cd00ee300 R15: 0000000000022000
FAULT_INJECTION: forcing a failure.
name fail_usercopy, interval 1, probability 0, space 0, times 0
CPU: 1 PID: 20343 Comm: syz-executor.2 Not tainted 5.10.60 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x107/0x163 lib/dump_stack.c:118
 fail_dump lib/fault-inject.c:52 [inline]
 should_fail.cold+0x5/0xa lib/fault-inject.c:146
 copyout lib/iov_iter.c:144 [inline]
 _copy_to_iter+0x25b/0x1060 lib/iov_iter.c:637
 copy_to_iter include/linux/uio.h:137 [inline]
 iterate_tty_read drivers/tty/tty_io.c:878 [inline]
 tty_read+0x2a9/0x5e0 drivers/tty/tty_io.c:935
 call_read_iter include/linux/fs.h:1897 [inline]
 new_sync_read+0x41f/0x6e0 fs/read_write.c:415
 vfs_read+0x451/0x580 fs/read_write.c:496
 ksys_read+0x12d/0x250 fs/read_write.c:634
 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x466609
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f953684a188 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 0000000000466609
RDX: 0000000000000092 RSI: 0000000020000100 RDI: 0000000000000003
RBP: 00007f953684a1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffd2c75709f R14: 00007f953684a300 R15: 0000000000022000
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 0 PID: 20330 Comm: syz-executor.3 Not tainted 5.10.60 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x107/0x163 lib/dump_stack.c:118
 fail_dump lib/fault-inject.c:52 [inline]
 should_fail.cold+0x5/0xa lib/fault-inject.c:146
 should_failslab+0x5/0x10 mm/slab_common.c:1193
 slab_pre_alloc_hook mm/slab.h:515 [inline]
 slab_alloc_node mm/slub.c:2814 [inline]
 slab_alloc mm/slub.c:2897 [inline]
 kmem_cache_alloc+0x5b/0x350 mm/slub.c:2902
 kmem_cache_zalloc include/linux/slab.h:654 [inline]
 jbd2_alloc_handle include/linux/jbd2.h:1554 [inline]
 new_handle fs/jbd2/transaction.c:464 [inline]
 jbd2__journal_start+0x18d/0x690 fs/jbd2/transaction.c:491
 __ext4_journal_start_sb+0x210/0x420 fs/ext4/ext4_jbd2.c:105
 __ext4_journal_start fs/ext4/ext4_jbd2.h:328 [inline]
 ext4_xattr_set+0x23a/0x340 fs/ext4/xattr.c:2489
 __vfs_setxattr+0x10f/0x170 fs/xattr.c:177
 __vfs_setxattr_noperm+0x11a/0x4c0 fs/xattr.c:208
 __vfs_setxattr_locked+0x1c2/0x250 fs/xattr.c:266
 vfs_setxattr+0xe8/0x270 fs/xattr.c:283
 setxattr+0x23d/0x330 fs/xattr.c:548
 __do_sys_fsetxattr fs/xattr.c:603 [inline]
 __se_sys_fsetxattr fs/xattr.c:592 [inline]
 __x64_sys_fsetxattr+0x1f4/0x280 fs/xattr.c:592
 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x466609
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f0f99556188 EFLAGS: 00000246 ORIG_RAX: 00000000000000be
RAX: ffffffffffffffda RBX: 000000000056c038 RCX: 0000000000466609
RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000003
RBP: 00007f0f995561d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffd4dd1f44f R14: 00007f0f99556300 R15: 0000000000022000
FAULT_INJECTION: forcing a failure.
name fail_page_alloc, interval 1, probability 0, space 0, times 1
CPU: 1 PID: 20132 Comm: syz-executor.5 Not tainted 5.10.60 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x107/0x163 lib/dump_stack.c:118
 fail_dump lib/fault-inject.c:52 [inline]
 should_fail.cold+0x5/0xa lib/fault-inject.c:146
 prepare_alloc_pages mm/page_alloc.c:4899 [inline]
 __alloc_pages_nodemask+0x17f/0x670 mm/page_alloc.c:4941
 alloc_pages_current+0x187/0x280 mm/mempolicy.c:2271
 alloc_pages include/linux/gfp.h:547 [inline]
 __get_free_pages+0xc/0xa0 mm/page_alloc.c:4994
 tlb_next_batch mm/mmu_gather.c:29 [inline]
 __tlb_remove_page_size+0x24e/0x410 mm/mmu_gather.c:83
 __tlb_remove_page include/asm-generic/tlb.h:438 [inline]
 zap_pte_range mm/memory.c:1268 [inline]
 zap_pmd_range mm/memory.c:1380 [inline]
 zap_pud_range mm/memory.c:1409 [inline]
 zap_p4d_range mm/memory.c:1430 [inline]
 unmap_page_range+0xeb1/0x1e00 mm/memory.c:1451
 unmap_single_vma+0x198/0x300 mm/memory.c:1496
 unmap_vmas+0x16d/0x2f0 mm/memory.c:1528
 exit_mmap+0x27f/0x4e0 mm/mmap.c:3220
 __mmput kernel/fork.c:1088 [inline]
 mmput+0xca/0x340 kernel/fork.c:1109
 exit_mm kernel/exit.c:487 [inline]
 do_exit+0xb36/0x2770 kernel/exit.c:798
 do_group_exit+0x125/0x310 kernel/exit.c:908
 get_signal+0x469/0x2210 kernel/signal.c:2758
 arch_do_signal+0x88/0x1b00 arch/x86/kernel/signal.c:805
 exit_to_user_mode_loop kernel/entry/common.c:161 [inline]
 exit_to_user_mode_prepare+0xf7/0x160 kernel/entry/common.c:191
 syscall_exit_to_user_mode+0x38/0x230 kernel/entry/common.c:266
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x466609
Code: Unable to access opcode bytes at RIP 0x4665df.
RSP: 002b:00007fd99bd07188 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: fffffffffffffe00 RBX: 000000000056bf80 RCX: 0000000000466609
RDX: 0000000000000092 RSI: 0000000020000100 RDI: 0000000000000003
RBP: 00007fd99bd071d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffd378c5d9f R14: 00007fd99bd07300 R15: 0000000000022000