REISERFS (device loop1): journal params: device loop1, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 REISERFS (device loop1): checking transaction log (loop1) REISERFS (device loop1): Using r5 hash to sort names REISERFS (device loop1): Created .reiserfs_priv - reserved for xattr storage. ====================================================== WARNING: possible circular locking dependency detected 4.14.304-syzkaller #0 Not tainted ------------------------------------------------------ systemd-udevd/11410 is trying to acquire lock: F2FS-fs (loop0): Found nat_bits in checkpoint (&(&gsm->tx_lock)->rlock){-...}, at: [] gsmld_write_wakeup+0x4e/0xd0 drivers/tty/n_gsm.c:2490 but task is already holding lock: (&port_lock_key){-.-.}, at: [] serial8250_handle_irq.part.0+0x20/0x390 drivers/tty/serial/8250/8250_port.c:1894 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&port_lock_key){-.-.}: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x8c/0xc0 kernel/locking/spinlock.c:160 uart_write_room+0xd5/0x340 drivers/tty/serial/serial_core.c:643 tty_write_room+0x61/0x80 drivers/tty/tty_ioctl.c:78 gsmld_write+0x69/0x120 drivers/tty/n_gsm.c:2546 do_tty_write drivers/tty/tty_io.c:959 [inline] tty_write+0x410/0x740 drivers/tty/tty_io.c:1043 __vfs_write+0xe4/0x630 fs/read_write.c:480 __kernel_write+0xf5/0x330 fs/read_write.c:501 write_pipe_buf+0x143/0x1c0 fs/splice.c:797 splice_from_pipe_feed fs/splice.c:502 [inline] __splice_from_pipe+0x326/0x7a0 fs/splice.c:626 splice_from_pipe fs/splice.c:661 [inline] default_file_splice_write+0xc5/0x150 fs/splice.c:809 do_splice_from fs/splice.c:851 [inline] direct_splice_actor+0x115/0x160 fs/splice.c:1018 splice_direct_to_actor+0x27c/0x730 fs/splice.c:973 do_splice_direct+0x164/0x210 fs/splice.c:1061 do_sendfile+0x47f/0xb30 fs/read_write.c:1441 SYSC_sendfile64 fs/read_write.c:1502 [inline] SyS_sendfile64+0xff/0x110 fs/read_write.c:1488 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 -> #0 (&(&gsm->tx_lock)->rlock){-...}: lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x8c/0xc0 kernel/locking/spinlock.c:160 gsmld_write_wakeup+0x4e/0xd0 drivers/tty/n_gsm.c:2490 tty_wakeup+0xc3/0xf0 drivers/tty/tty_io.c:533 tty_port_default_wakeup+0x26/0x40 drivers/tty/tty_port.c:49 serial8250_tx_chars+0x3fe/0xc70 drivers/tty/serial/8250/8250_port.c:1828 serial8250_handle_irq.part.0+0x2c7/0x390 drivers/tty/serial/8250/8250_port.c:1918 serial8250_handle_irq drivers/tty/serial/8250/8250_port.c:1891 [inline] serial8250_default_handle_irq+0x8a/0x1f0 drivers/tty/serial/8250/8250_port.c:1934 serial8250_interrupt+0xf3/0x210 drivers/tty/serial/8250/8250_core.c:129 __handle_irq_event_percpu+0xee/0x7f0 kernel/irq/handle.c:147 handle_irq_event_percpu kernel/irq/handle.c:187 [inline] handle_irq_event+0xed/0x240 kernel/irq/handle.c:204 handle_edge_irq+0x224/0xc40 kernel/irq/chip.c:770 generic_handle_irq_desc include/linux/irqdesc.h:159 [inline] handle_irq+0x35/0x50 arch/x86/kernel/irq_64.c:87 do_IRQ+0x93/0x1d0 arch/x86/kernel/irq.c:230 ret_from_intr+0x0/0x1e arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline] lock_is_held_type+0x17a/0x210 kernel/locking/lockdep.c:4038 lock_is_held include/linux/lockdep.h:437 [inline] ___might_sleep+0x227/0x2b0 kernel/sched/core.c:6006 slab_pre_alloc_hook mm/slab.h:419 [inline] slab_alloc mm/slab.c:3376 [inline] kmem_cache_alloc+0x284/0x3c0 mm/slab.c:3550 getname_flags+0xc8/0x550 fs/namei.c:138 user_path_at_empty+0x2a/0x50 fs/namei.c:2631 user_path_at include/linux/namei.h:57 [inline] vfs_statx+0xd1/0x180 fs/stat.c:185 vfs_lstat include/linux/fs.h:3072 [inline] SYSC_newlstat fs/stat.c:349 [inline] SyS_newlstat+0x83/0xe0 fs/stat.c:343 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&port_lock_key); lock(&(&gsm->tx_lock)->rlock); lock(&port_lock_key); lock(&(&gsm->tx_lock)->rlock); *** DEADLOCK *** 3 locks held by systemd-udevd/11410: #0: (&(&i->lock)->rlock){-.-.}, at: [] spin_lock include/linux/spinlock.h:317 [inline] #0: (&(&i->lock)->rlock){-.-.}, at: [] serial8250_interrupt+0x3a/0x210 drivers/tty/serial/8250/8250_core.c:119 #1: (&port_lock_key){-.-.}, at: [] serial8250_handle_irq.part.0+0x20/0x390 drivers/tty/serial/8250/8250_port.c:1894 #2: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref+0x1b/0x80 drivers/tty/tty_ldisc.c:305 stack backtrace: CPU: 1 PID: 11410 Comm: systemd-udevd Not tainted 4.14.304-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 print_circular_bug.constprop.0.cold+0x2d7/0x41e kernel/locking/lockdep.c:1258 check_prev_add kernel/locking/lockdep.c:1905 [inline] check_prevs_add kernel/locking/lockdep.c:2022 [inline] validate_chain kernel/locking/lockdep.c:2464 [inline] __lock_acquire+0x2e0e/0x3f20 kernel/locking/lockdep.c:3491 lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x8c/0xc0 kernel/locking/spinlock.c:160 gsmld_write_wakeup+0x4e/0xd0 drivers/tty/n_gsm.c:2490 tty_wakeup+0xc3/0xf0 drivers/tty/tty_io.c:533 tty_port_default_wakeup+0x26/0x40 drivers/tty/tty_port.c:49 serial8250_tx_chars+0x3fe/0xc70 drivers/tty/serial/8250/8250_port.c:1828 serial8250_handle_irq.part.0+0x2c7/0x390 drivers/tty/serial/8250/8250_port.c:1918 serial8250_handle_irq drivers/tty/serial/8250/8250_port.c:1891 [inline] serial8250_default_handle_irq+0x8a/0x1f0 drivers/tty/serial/8250/8250_port.c:1934 serial8250_interrupt+0xf3/0x210 drivers/tty/serial/8250/8250_core.c:129 __handle_irq_event_percpu+0xee/0x7f0 kernel/irq/handle.c:147 handle_irq_event_percpu kernel/irq/handle.c:187 [inline] handle_irq_event+0xed/0x240 kernel/irq/handle.c:204 handle_edge_irq+0x224/0xc40 kernel/irq/chip.c:770 generic_handle_irq_desc include/linux/irqdesc.h:159 [inline] handle_irq+0x35/0x50 arch/x86/kernel/irq_64.c:87 do_IRQ+0x93/0x1d0 arch/x86/kernel/irq.c:230 common_interrupt+0x93/0x93 arch/x86/entry/entry_64.S:578 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline] RIP: 0010:lock_is_held_type+0x17a/0x210 kernel/locking/lockdep.c:4038 RSP: 0018:ffff88809373fc48 EFLAGS: 00000282 ORIG_RAX: ffffffffffffffc8 RAX: 1ffffffff11e13d9 RBX: 0000000000000282 RCX: 0000000000000001 RDX: dffffc0000000000 RSI: 00000000ffffffff RDI: 0000000000000282 RBP: ffff8880b54ea380 R08: ffffffff8b9b1408 R09: 0000000000000000 R10: 0000000000000000 R11: ffff8880b54ea380 R12: 0000000000000000 R13: 00000000014000c0 R14: ffffffff8a096c78 R15: 0000000000000000 lock_is_held include/linux/lockdep.h:437 [inline] ___might_sleep+0x227/0x2b0 kernel/sched/core.c:6006 slab_pre_alloc_hook mm/slab.h:419 [inline] slab_alloc mm/slab.c:3376 [inline] kmem_cache_alloc+0x284/0x3c0 mm/slab.c:3550 getname_flags+0xc8/0x550 fs/namei.c:138 user_path_at_empty+0x2a/0x50 fs/namei.c:2631 user_path_at include/linux/namei.h:57 [inline] vfs_statx+0xd1/0x180 fs/stat.c:185 vfs_lstat include/linux/fs.h:3072 [inline] SYSC_newlstat fs/stat.c:349 [inline] SyS_newlstat+0x83/0xe0 fs/stat.c:343 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 RIP: 0033:0x7fbe778b9335 RSP: 002b:00007ffd9c0b0f18 EFLAGS: 00000246 ORIG_RAX: 0000000000000006 RAX: ffffffffffffffda RBX: 00005574dc6618a0 RCX: 00007fbe778b9335 RDX: 00007ffd9c0b0f50 RSI: 00007ffd9c0b0f50 RDI: 00005574dc6608a0 RBP: 00007ffd9c0b1010 R08: 00007fbe77b781b8 R09: 0000000000001010 R10: 0000000000000020 R11: 0000000000000246 R12: 00005574dc6608a0 R13: 00005574dc6608a4 R14: 00005574dc66c981 R15: 00005574dc66c984 F2FS-fs (loop0): Mounted with checkpoint version = 48b305e5 nla_parse: 8 callbacks suppressed netlink: 1 bytes leftover after parsing attributes in process `syz-executor.2'. unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1 netlink: 1 bytes leftover after parsing attributes in process `syz-executor.2'. netlink: 1 bytes leftover after parsing attributes in process `syz-executor.2'. netlink: 1 bytes leftover after parsing attributes in process `syz-executor.2'. BTRFS info (device loop4): enabling inode map caching BTRFS info (device loop4): force clearing of disk cache BTRFS info (device loop4): disabling free space tree BTRFS info (device loop4): has skinny extents audit: type=1800 audit(1675267083.594:53): pid=11638 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.5" name="file0" dev="loop5" ino=119 res=0 BTRFS info (device loop4): clearing free space tree audit: type=1804 audit(1675267083.614:54): pid=11638 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.5" name="/root/syzkaller-testdir1327407832/syzkaller.enGPMl/66/file0/file0" dev="loop5" ino=119 res=1 BTRFS info (device loop4): clearing 1 ro feature flag F2FS-fs (loop0): Found nat_bits in checkpoint BTRFS info (device loop4): clearing 2 ro feature flag BTRFS info (device loop4): checking UUID tree F2FS-fs (loop0): Mounted with checkpoint version = 48b305e5 audit: type=1800 audit(1675267084.014:55): pid=11718 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.5" name="file0" dev="loop5" ino=120 res=0 audit: type=1804 audit(1675267084.014:56): pid=11718 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.5" name="/root/syzkaller-testdir1327407832/syzkaller.enGPMl/67/file0/file0" dev="loop5" ino=120 res=1 audit: type=1800 audit(1675267084.164:57): pid=11792 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.5" name="file0" dev="loop5" ino=121 res=0 audit: type=1804 audit(1675267084.174:58): pid=11792 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.5" name="/root/syzkaller-testdir1327407832/syzkaller.enGPMl/68/file0/file0" dev="loop5" ino=121 res=1 audit: type=1800 audit(1675267084.304:59): pid=11818 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.5" name="file0" dev="loop5" ino=122 res=0 audit: type=1804 audit(1675267084.314:60): pid=11818 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.5" name="/root/syzkaller-testdir1327407832/syzkaller.enGPMl/69/file0/file0" dev="loop5" ino=122 res=1 audit: type=1800 audit(1675267084.544:61): pid=11828 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.5" name="file0" dev="loop5" ino=123 res=0 audit: type=1804 audit(1675267084.544:62): pid=11828 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.5" name="/root/syzkaller-testdir1327407832/syzkaller.enGPMl/70/file0/file0" dev="loop5" ino=123 res=1 F2FS-fs (loop0): Found nat_bits in checkpoint F2FS-fs (loop0): Mounted with checkpoint version = 48b305e5 F2FS-fs (loop2): Found nat_bits in checkpoint F2FS-fs (loop2): Mounted with checkpoint version = 48b305e5 arp_tables: arptables: counters copy to user failed while replacing table arp_tables: arptables: counters copy to user failed while replacing table FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) FAT-fs (loop3): Filesystem has been set read-only arp_tables: arptables: counters copy to user failed while replacing table FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) arp_tables: arptables: counters copy to user failed while replacing table FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) F2FS-fs (loop5): Found nat_bits in checkpoint FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) F2FS-fs (loop2): Found nat_bits in checkpoint F2FS-fs (loop5): Mounted with checkpoint version = 48b305e5 FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) F2FS-fs (loop2): Mounted with checkpoint version = 48b305e5 FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) FAT-fs (loop3): Filesystem has been set read-only F2FS-fs (loop5): Found nat_bits in checkpoint FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) F2FS-fs (loop5): Mounted with checkpoint version = 48b305e5 FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) F2FS-fs (loop2): Found nat_bits in checkpoint FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) F2FS-fs (loop2): Mounted with checkpoint version = 48b305e5 FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) FAT-fs (loop3): error, fat_bmap_cluster: request beyond EOF (i_pos 2070) f2fs_msg: 2 callbacks suppressed F2FS-fs (loop2): Found nat_bits in checkpoint