EXT4-fs error (device loop2): ext4_ext_check_inode:510: inode #2: comm syz-executor.2: pblk 0 bad header/extent: invalid extent entries - magic f30a, entries 1, max 4(4), depth 0(0)
netlink: 24 bytes leftover after parsing attributes in process `syz-executor.0'.
EXT4-fs (loop2): get root inode failed
EXT4-fs (loop2): mount failed
======================================================
WARNING: possible circular locking dependency detected
4.14.304-syzkaller #0 Not tainted
------------------------------------------------------
systemd-udevd/10292 is trying to acquire lock:
(&(&gsm->tx_lock)->rlock){-...}, at: [<ffffffff8357507e>] gsmld_write_wakeup+0x4e/0xd0 drivers/tty/n_gsm.c:2490
but task is already holding lock:
(&port_lock_key){-.-.}, at: [<ffffffff835ca920>] 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
__read_once_size include/linux/compiler.h:185 [inline]
compound_head include/linux/page-flags.h:147 [inline]
PageSwapCache include/linux/page-flags.h:331 [inline]
free_swap_cache mm/swap_state.c:294 [inline]
free_pages_and_swap_cache+0x73/0x210 mm/swap_state.c:322
tlb_flush_mmu_free+0xc1/0x1a0 mm/memory.c:272
tlb_flush_mmu mm/memory.c:281 [inline]
arch_tlb_finish_mmu mm/memory.c:296 [inline]
tlb_finish_mmu+0xf3/0x1e0 mm/memory.c:463
exit_mmap+0x290/0x4d0 mm/mmap.c:3080
__mmput kernel/fork.c:931 [inline]
mmput kernel/fork.c:952 [inline]
mmput+0xfa/0x420 kernel/fork.c:947
exit_mm kernel/exit.c:548 [inline]
do_exit+0x984/0x2850 kernel/exit.c:855
do_group_exit+0x100/0x2e0 kernel/exit.c:965
SYSC_exit_group kernel/exit.c:976 [inline]
SyS_exit_group+0x19/0x20 kernel/exit.c:974
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/10292:
#0: (&(&i->lock)->rlock){-.-.}, at: [<ffffffff835b7caa>] spin_lock include/linux/spinlock.h:317 [inline]
#0: (&(&i->lock)->rlock){-.-.}, at: [<ffffffff835b7caa>] serial8250_interrupt+0x3a/0x210 drivers/tty/serial/8250/8250_core.c:119
#1: (&port_lock_key){-.-.}, at: [<ffffffff835ca920>] serial8250_handle_irq.part.0+0x20/0x390 drivers/tty/serial/8250/8250_port.c:1894
#2: (&tty->ldisc_sem){++++}, at: [<ffffffff8355ceab>] tty_ldisc_ref+0x1b/0x80 drivers/tty/tty_ldisc.c:305
stack backtrace:
CPU: 1 PID: 10292 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:
<IRQ>
__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
</IRQ>
RIP: 0010:__read_once_size include/linux/compiler.h:185 [inline]
RIP: 0010:compound_head include/linux/page-flags.h:147 [inline]
RIP: 0010:PageSwapCache include/linux/page-flags.h:331 [inline]
RIP: 0010:free_swap_cache mm/swap_state.c:294 [inline]
RIP: 0010:free_pages_and_swap_cache+0x73/0x210 mm/swap_state.c:322
RSP: 0018:ffff888056c9fb90 EFLAGS: 00000246 ORIG_RAX: ffffffffffffffc8
RAX: 1ffffd40004a3abc RBX: ffff8880943f8a78 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffea000257c9e0
RBP: ffffea000257c9c0 R08: 0000000000000282 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
R13: ffffea000251d5c0 R14: ffffea000251d5e0 R15: ffffea000257c9c0
tlb_flush_mmu_free+0xc1/0x1a0 mm/memory.c:272
tlb_flush_mmu mm/memory.c:281 [inline]
arch_tlb_finish_mmu mm/memory.c:296 [inline]
tlb_finish_mmu+0xf3/0x1e0 mm/memory.c:463
exit_mmap+0x290/0x4d0 mm/mmap.c:3080
__mmput kernel/fork.c:931 [inline]
mmput kernel/fork.c:952 [inline]
mmput+0xfa/0x420 kernel/fork.c:947
exit_mm kernel/exit.c:548 [inline]
do_exit+0x984/0x2850 kernel/exit.c:855
do_group_exit+0x100/0x2e0 kernel/exit.c:965
SYSC_exit_group kernel/exit.c:976 [inline]
SyS_exit_group+0x19/0x20 kernel/exit.c:974
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x5e/0xd3
RIP: 0033:0x7ff3f7859618
RSP: 002b:00007fff149b7378 EFLAGS: 00000206 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007fff149b7440 RCX: 00007ff3f7859618
RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
RBP: 00007fff149b74f0 R08: 00000000000000e7 R09: fffffffffffffe50
R10: 00000000ffffffff R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000003 R15: 000000000000000e
netlink: 24 bytes leftover after parsing attributes in process `syz-executor.0'.
EXT4-fs error (device loop2): ext4_ext_check_inode:510: inode #2: comm syz-executor.2: pblk 0 bad header/extent: invalid extent entries - magic f30a, entries 1, max 4(4), depth 0(0)
EXT4-fs (loop2): get root inode failed
EXT4-fs (loop2): mount failed
pci 0000:00:05.0: vgaarb: changed VGA decodes: olddecodes=io+mem,decodes=none:owns=io+mem
EXT4-fs error (device loop2): ext4_ext_check_inode:510: inode #2: comm syz-executor.2: pblk 0 bad header/extent: invalid extent entries - magic f30a, entries 1, max 4(4), depth 0(0)
EXT4-fs (loop2): get root inode failed
EXT4-fs (loop2): mount failed
pci 0000:00:05.0: vgaarb: changed VGA decodes: olddecodes=none,decodes=none:owns=io+mem
pci 0000:00:05.0: vgaarb: changed VGA decodes: olddecodes=none,decodes=none:owns=io+mem
pci 0000:00:05.0: vgaarb: changed VGA decodes: olddecodes=none,decodes=none:owns=io+mem
print_req_error: I/O error, dev loop4, sector 0
print_req_error: I/O error, dev loop4, sector 0
L1TF CPU bug present and SMT on, data leak possible. See CVE-2018-3646 and https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/l1tf.html for details.
hugetlbfs: syz-executor.5 (11033): Using mlock ulimits for SHM_HUGETLB is deprecated
openvswitch: netlink: Flow actions attr not present in new flow.
openvswitch: netlink: Flow actions attr not present in new flow.
openvswitch: netlink: Flow actions attr not present in new flow.
openvswitch: netlink: Flow actions attr not present in new flow.
overlayfs: fs on '.' does not support file handles, falling back to index=off.
overlayfs: filesystem on 'file0' not supported
overlayfs: fs on '.' does not support file handles, falling back to index=off.
overlayfs: fs on '.' does not support file handles, falling back to index=off.
overlayfs: fs on '.' does not support file handles, falling back to index=off.
overlayfs: filesystem on 'file0' not supported
overlayfs: filesystem on 'file0' not supported
overlayfs: filesystem on 'file0' not supported
UDF-fs: error (device loop0): udf_read_tagged: read failed, block=256, location=256
UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000)
overlayfs: fs on '.' does not support file handles, falling back to index=off.
overlayfs: filesystem on 'file0' not supported
overlayfs: fs on '.' does not support file handles, falling back to index=off.
overlayfs: filesystem on 'file0' not supported
overlayfs: fs on '.' does not support file handles, falling back to index=off.
overlayfs: filesystem on 'file0' not supported
UDF-fs: error (device loop0): udf_read_tagged: read failed, block=256, location=256
UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000)
overlayfs: fs on '.' does not support file handles, falling back to index=off.
overlayfs: fs on '.' does not support file handles, falling back to index=off.
overlayfs: filesystem on 'file0' not supported
overlayfs: filesystem on 'file0' not supported
UDF-fs: error (device loop0): udf_read_tagged: read failed, block=256, location=256
UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000)
audit: type=1800 audit(1675089801.922:21): pid=11497 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.4" name="file0" dev="sda1" ino=14030 res=0
overlayfs: fs on '.' does not support file handles, falling back to index=off.
overlayfs: filesystem on 'file0' not supported
�: renamed from syztnl2
audit: type=1800 audit(1675089802.612:22): pid=11518 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.3" name="bus" dev="sda1" ino=14004 res=0
audit: type=1800 audit(1675089803.052:23): pid=11534 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.4" name="file0" dev="sda1" ino=14042 res=0
UDF-fs: error (device loop0): udf_read_tagged: read failed, block=256, location=256
UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000)
bridge0: port 2(bridge_slave_1) entered disabled state
bridge0: port 1(bridge_slave_0) entered disabled state
batman_adv: batadv0: Interface deactivated: batadv_slave_0
batman_adv: batadv0: Interface deactivated: batadv_slave_1