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Message-ID: <20240902133447.2853-1-spasswolf@web.de>
Date: Mon, 2 Sep 2024 15:34:46 +0200
From: Bert Karwatzki <spasswolf@....de>
To: yangyun <yangyun50@...wei.com>
Cc: Bert Karwatzki <spasswolf@....de>,
linux-kernel@...r.kernel.org,
Miklos Szeredi <mszeredi@...hat.com>
Subject: commit 5fb9c98e9d8d causes deadlock
Since linux next-20240902 starting debian sid on my MSI Alpha 15 Laptop hangs
before the GUI is enabled. After rebooting into a working kernel (v6.11-rc6)
the following messages can be found in /var/log/kern.log:
2024-09-02T11:15:06.501185+02:00 lisa kernel: [ C4] rcu: INFO: rcu_preempt self-detected stall on CPU
2024-09-02T11:15:06.501190+02:00 lisa kernel: [ C4] rcu: 4-....: (20994 ticks this GP) idle=2214/1/0x4000000000000000 softirq=968/968 fqs=4561
2024-09-02T11:15:06.501192+02:00 lisa kernel: [ C4] rcu: (t=21001 jiffies g=993 q=8719 ncpus=16)
2024-09-02T11:15:06.501193+02:00 lisa kernel: [ C4] CPU: 4 UID: 0 PID: 1282 Comm: fusermount3 Not tainted 6.11.0-rc6-next-20240902-master #366
2024-09-02T11:15:06.501196+02:00 lisa kernel: [ C4] Hardware name: Micro-Star International Co., Ltd. Alpha 15 B5EEK/MS-158L, BIOS E158LAMS.107 11/10/2021
2024-09-02T11:15:06.501198+02:00 lisa kernel: [ C4] RIP: 0010:queued_spin_lock_slowpath+0x43/0x1b0
2024-09-02T11:15:06.501201+02:00 lisa kernel: [ C4] Code: ba 2a 08 0f 92 c1 8b 02 0f b6 c9 c1 e1 08 30 e4 09 c8 3d ff 00 00 00 0f 87 e9 00 00 00 85 c0 74 10 0f b6 02 84 c0 74 09 f3 90 <0f> b6 02 84 c0 75 f7 b8 01 00 00 00 66 89 02 e9 54 dd 1d 00 8b 37
2024-09-02T11:15:06.501203+02:00 lisa kernel: [ C4] RSP: 0018:ffffb64a45267d08 EFLAGS: 00000202
2024-09-02T11:15:06.501206+02:00 lisa kernel: [ C4] RAX: 0000000000000001 RBX: ffff9f0cd1187a38 RCX: 0000000000000000
2024-09-02T11:15:06.501208+02:00 lisa kernel: [ C4] RDX: ffff9f0cd1187a38 RSI: 0000000000000001 RDI: ffff9f0cd1187a38
2024-09-02T11:15:06.501210+02:00 lisa kernel: [ C4] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffffff8b0261c8
2024-09-02T11:15:06.501211+02:00 lisa kernel: [ C4] R10: 0000000000000001 R11: 0000000000000005 R12: ffffb64a45267d58
2024-09-02T11:15:06.501213+02:00 lisa kernel: [ C4] R13: ffff9f0cd1187700 R14: 0000000000000000 R15: ffff9f0c89b73c00
2024-09-02T11:15:06.501215+02:00 lisa kernel: [ C4] FS: 00007fde155f0740(0000) GS:ffff9f1b2e700000(0000) knlGS:0000000000000000
2024-09-02T11:15:06.501234+02:00 lisa kernel: [ C4] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
2024-09-02T11:15:06.501236+02:00 lisa kernel: [ C4] CR2: 00007fde157327b0 CR3: 000000018167a000 CR4: 0000000000750ef0
2024-09-02T11:15:06.501238+02:00 lisa kernel: [ C4] PKRU: 55555554
2024-09-02T11:15:06.501239+02:00 lisa kernel: [ C4] Call Trace:
2024-09-02T11:15:06.501252+02:00 lisa kernel: [ C4] <IRQ>
2024-09-02T11:15:06.501254+02:00 lisa kernel: [ C4] ? rcu_dump_cpu_stacks+0xd6/0x100
2024-09-02T11:15:06.501256+02:00 lisa kernel: [ C4] ? rcu_sched_clock_irq+0x31d/0xb20
2024-09-02T11:15:06.501259+02:00 lisa kernel: [ C4] ? srso_alias_return_thunk+0x5/0xfbef5
2024-09-02T11:15:06.501260+02:00 lisa kernel: [ C4] ? update_load_avg+0x77/0x6b0
2024-09-02T11:15:06.501261+02:00 lisa kernel: [ C4] ? srso_alias_return_thunk+0x5/0xfbef5
2024-09-02T11:15:06.501263+02:00 lisa kernel: [ C4] ? update_process_times+0x69/0xa0
2024-09-02T11:15:06.501264+02:00 lisa kernel: [ C4] ? tick_nohz_handler+0x8a/0x140
2024-09-02T11:15:06.501266+02:00 lisa kernel: [ C4] ? tick_do_update_jiffies64+0xd0/0xd0
2024-09-02T11:15:06.501268+02:00 lisa kernel: [ C4] ? __hrtimer_run_queues+0x110/0x1a0
2024-09-02T11:15:06.501270+02:00 lisa kernel: [ C4] ? hrtimer_interrupt+0xf5/0x210
2024-09-02T11:15:06.501272+02:00 lisa kernel: [ C4] ? __sysvec_apic_timer_interrupt+0x4e/0x60
2024-09-02T11:15:06.501274+02:00 lisa kernel: [ C4] ? sysvec_apic_timer_interrupt+0x64/0x80
2024-09-02T11:15:06.501275+02:00 lisa kernel: [ C4] </IRQ>
2024-09-02T11:15:06.501277+02:00 lisa kernel: [ C4] <TASK>
2024-09-02T11:15:06.501279+02:00 lisa kernel: [ C4] ? asm_sysvec_apic_timer_interrupt+0x1a/0x20
2024-09-02T11:15:06.501280+02:00 lisa kernel: [ C4] ? queued_spin_lock_slowpath+0x43/0x1b0
2024-09-02T11:15:06.501283+02:00 lisa kernel: [ C4] ? srso_alias_return_thunk+0x5/0xfbef5
2024-09-02T11:15:06.501284+02:00 lisa kernel: [ C4] ? fuse_iget+0x11c/0x250 [fuse]
2024-09-02T11:15:06.501286+02:00 lisa kernel: [ C4] ? fuse_fill_super_common+0x362/0x480 [fuse]
2024-09-02T11:15:06.501288+02:00 lisa kernel: [ C4] ? fuse_fill_super_common+0x480/0x480 [fuse]
2024-09-02T11:15:06.501291+02:00 lisa kernel: [ C4] ? fuse_fill_super+0x54/0x90 [fuse]
2024-09-02T11:15:06.501293+02:00 lisa kernel: [ C4] ? get_tree_nodev+0x64/0x90
2024-09-02T11:15:06.501294+02:00 lisa kernel: [ C4] ? fget+0x75/0xb0
2024-09-02T11:15:06.501297+02:00 lisa kernel: [ C4] ? fuse_get_tree+0xbd/0x190 [fuse]
2024-09-02T11:15:06.501298+02:00 lisa kernel: [ C4] ? vfs_get_tree+0x24/0xd0
2024-09-02T11:15:06.501300+02:00 lisa kernel: [ C4] ? srso_alias_return_thunk+0x5/0xfbef5
2024-09-02T11:15:06.501302+02:00 lisa kernel: [ C4] ? path_mount+0x472/0xab0
2024-09-02T11:15:06.501303+02:00 lisa kernel: [ C4] ? __x64_sys_mount+0x103/0x140
2024-09-02T11:15:06.501305+02:00 lisa kernel: [ C4] ? do_syscall_64+0x5f/0x170
2024-09-02T11:15:06.501308+02:00 lisa kernel: [ C4] ? entry_SYSCALL_64_after_hwframe+0x55/0x5d
2024-09-02T11:15:06.501310+02:00 lisa kernel: [ C4] </TASK>
[..]
2024-09-02T11:15:32.315047+02:00 lisa kernel: [ C4] watchdog: BUG: soft lockup - CPU#4 stuck for 45s! [fusermount3:1282]
2024-09-02T11:15:32.315052+02:00 lisa kernel: [ C4] Modules linked in: snd_seq_dummy snd_hrtimer snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device rfcomm cpufreq_userspace cpufreq_powersave cpufreq_conservative bnep nls_ascii nls_cp437 vfat fat snd_ctl_led snd_hda_codec_realtek snd_hda_codec_generic snd_hda_scodec_component snd_hda_codec_hdmi snd_hda_intel snd_intel_dspcfg btusb snd_hda_codec snd_soc_dmic snd_acp3x_rn snd_acp3x_pdm_dma uvcvideo btrtl snd_hwdep videobuf2_vmalloc snd_soc_core btintel uvc snd_hda_core videobuf2_memops btbcm snd_pcm_oss videobuf2_v4l2 btmtk snd_mixer_oss videodev snd_pcm bluetooth snd_rn_pci_acp3x snd_acp_config snd_timer videobuf2_common snd_soc_acpi msi_wmi ecdh_generic amd_atl ecc mc sparse_keymap edac_mce_amd wmi_bmof snd k10temp snd_pci_acp3x ac soundcore ccp battery hid_sensor_accel_3d hid_sensor_gyro_3d hid_sensor_magn_3d hid_sensor_als hid_sensor_prox button hid_sensor_trigger industrialio_triggered_buffer kfifo_buf amd_pmc industrialio hid_sensor_iio_common evdev joydev serio_raw mt7921e mt7921_common
2024-09-02T11:15:32.315056+02:00 lisa kernel: [ C4] mt792x_lib mt76_connac_lib mt76 mac80211 libarc4 cfg80211 rfkill msr nvme_fabrics fuse efi_pstore configfs efivarfs autofs4 ext4 crc32c_generic mbcache jbd2 usbhid amdgpu i2c_algo_bit drm_ttm_helper ttm xhci_pci drm_exec drm_suballoc_helper amdxcp xhci_hcd drm_buddy gpu_sched hid_sensor_hub usbcore nvme drm_display_helper mfd_core i2c_piix4 hid_multitouch hid_generic crc32c_intel psmouse amd_sfh i2c_smbus usb_common nvme_core crc16 r8169 i2c_hid_acpi i2c_hid hid i2c_designware_platform i2c_designware_core
2024-09-02T11:15:32.315059+02:00 lisa kernel: [ C4] CPU: 4 UID: 0 PID: 1282 Comm: fusermount3 Not tainted 6.11.0-rc6-next-20240902-master #366
2024-09-02T11:15:32.315061+02:00 lisa kernel: [ C4] Hardware name: Micro-Star International Co., Ltd. Alpha 15 B5EEK/MS-158L, BIOS E158LAMS.107 11/10/2021
2024-09-02T11:15:32.315063+02:00 lisa kernel: [ C4] RIP: 0010:queued_spin_lock_slowpath+0x46/0x1b0
2024-09-02T11:15:32.315065+02:00 lisa kernel: [ C4] Code: 0f 92 c1 8b 02 0f b6 c9 c1 e1 08 30 e4 09 c8 3d ff 00 00 00 0f 87 e9 00 00 00 85 c0 74 10 0f b6 02 84 c0 74 09 f3 90 0f b6 02 <84> c0 75 f7 b8 01 00 00 00 66 89 02 e9 54 dd 1d 00 8b 37 b8 00 02
2024-09-02T11:15:32.315068+02:00 lisa kernel: [ C4] RSP: 0018:ffffb64a45267d08 EFLAGS: 00000202
2024-09-02T11:15:32.315070+02:00 lisa kernel: [ C4] RAX: 0000000000000001 RBX: ffff9f0cd1187a38 RCX: 0000000000000000
2024-09-02T11:15:32.315072+02:00 lisa kernel: [ C4] RDX: ffff9f0cd1187a38 RSI: 0000000000000001 RDI: ffff9f0cd1187a38
2024-09-02T11:15:32.315074+02:00 lisa kernel: [ C4] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffffff8b0261c8
2024-09-02T11:15:32.315076+02:00 lisa kernel: [ C4] R10: 0000000000000001 R11: 0000000000000005 R12: ffffb64a45267d58
2024-09-02T11:15:32.315077+02:00 lisa kernel: [ C4] R13: ffff9f0cd1187700 R14: 0000000000000000 R15: ffff9f0c89b73c00
2024-09-02T11:15:32.315080+02:00 lisa kernel: [ C4] FS: 00007fde155f0740(0000) GS:ffff9f1b2e700000(0000) knlGS:0000000000000000
2024-09-02T11:15:32.315082+02:00 lisa kernel: [ C4] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
2024-09-02T11:15:32.315084+02:00 lisa kernel: [ C4] CR2: 00007fde157327b0 CR3: 000000018167a000 CR4: 0000000000750ef0
2024-09-02T11:15:32.315086+02:00 lisa kernel: [ C4] PKRU: 55555554
2024-09-02T11:15:32.315088+02:00 lisa kernel: [ C4] Call Trace:
2024-09-02T11:15:32.315090+02:00 lisa kernel: [ C4] <IRQ>
2024-09-02T11:15:32.315092+02:00 lisa kernel: [ C4] ? watchdog_timer_fn.cold+0x3d/0x9c
2024-09-02T11:15:32.315094+02:00 lisa kernel: [ C4] ? softlockup_fn+0x50/0x50
2024-09-02T11:15:32.315097+02:00 lisa kernel: [ C4] ? __hrtimer_run_queues+0x110/0x1a0
2024-09-02T11:15:32.315099+02:00 lisa kernel: [ C4] ? hrtimer_interrupt+0xf5/0x210
2024-09-02T11:15:32.315101+02:00 lisa kernel: [ C4] ? __sysvec_apic_timer_interrupt+0x4e/0x60
2024-09-02T11:15:32.315104+02:00 lisa kernel: [ C4] ? sysvec_apic_timer_interrupt+0x64/0x80
2024-09-02T11:15:32.315106+02:00 lisa kernel: [ C4] </IRQ>
2024-09-02T11:15:32.315108+02:00 lisa kernel: [ C4] <TASK>
2024-09-02T11:15:32.315111+02:00 lisa kernel: [ C4] ? asm_sysvec_apic_timer_interrupt+0x1a/0x20
2024-09-02T11:15:32.315113+02:00 lisa kernel: [ C4] ? queued_spin_lock_slowpath+0x46/0x1b0
2024-09-02T11:15:32.315115+02:00 lisa kernel: [ C4] ? srso_alias_return_thunk+0x5/0xfbef5
2024-09-02T11:15:32.315117+02:00 lisa kernel: [ C4] ? fuse_iget+0x11c/0x250 [fuse]
2024-09-02T11:15:32.315120+02:00 lisa kernel: [ C4] ? fuse_fill_super_common+0x362/0x480 [fuse]
2024-09-02T11:15:32.315122+02:00 lisa kernel: [ C4] ? fuse_fill_super_common+0x480/0x480 [fuse]
2024-09-02T11:15:32.315124+02:00 lisa kernel: [ C4] ? fuse_fill_super+0x54/0x90 [fuse]
2024-09-02T11:15:32.315126+02:00 lisa kernel: [ C4] ? get_tree_nodev+0x64/0x90
2024-09-02T11:15:32.315128+02:00 lisa kernel: [ C4] ? fget+0x75/0xb0
2024-09-02T11:15:32.315129+02:00 lisa kernel: [ C4] ? fuse_get_tree+0xbd/0x190 [fuse]
2024-09-02T11:15:32.315132+02:00 lisa kernel: [ C4] ? vfs_get_tree+0x24/0xd0
2024-09-02T11:15:32.315134+02:00 lisa kernel: [ C4] ? srso_alias_return_thunk+0x5/0xfbef5
2024-09-02T11:15:32.315136+02:00 lisa kernel: [ C4] ? path_mount+0x472/0xab0
2024-09-02T11:15:32.315138+02:00 lisa kernel: [ C4] ? __x64_sys_mount+0x103/0x140
2024-09-02T11:15:32.315139+02:00 lisa kernel: [ C4] ? do_syscall_64+0x5f/0x170
2024-09-02T11:15:32.315140+02:00 lisa kernel: [ C4] ? entry_SYSCALL_64_after_hwframe+0x55/0x5d
2024-09-02T11:15:32.315142+02:00 lisa kernel: [ C4] </TASK>
2024-09-02T11:15:34.520022+02:00 lisa kernel: [ T18] rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 4-.... } 21130 jiffies s: 965 root: 0x10/.
2024-09-02T11:15:34.520027+02:00 lisa kernel: [ T18] rcu: blocking rcu_node structures (internal RCU debug):
2024-09-02T11:15:34.520029+02:00 lisa kernel: [ T18] Sending NMI from CPU 0 to CPUs 4:
2024-09-02T11:15:34.520030+02:00 lisa kernel: [ C4] NMI backtrace for cpu 4
2024-09-02T11:15:34.520032+02:00 lisa kernel: [ C4] CPU: 4 UID: 0 PID: 1282 Comm: fusermount3 Tainted: G L 6.11.0-rc6-next-20240902-master #366
2024-09-02T11:15:34.520033+02:00 lisa kernel: [ C4] Tainted: [L]=SOFTLOCKUP
2024-09-02T11:15:34.520036+02:00 lisa kernel: [ C4] Hardware name: Micro-Star International Co., Ltd. Alpha 15 B5EEK/MS-158L, BIOS E158LAMS.107 11/10/2021
2024-09-02T11:15:34.520038+02:00 lisa kernel: [ C4] RIP: 0010:queued_spin_lock_slowpath+0x46/0x1b0
2024-09-02T11:15:34.520040+02:00 lisa kernel: [ C4] Code: 0f 92 c1 8b 02 0f b6 c9 c1 e1 08 30 e4 09 c8 3d ff 00 00 00 0f 87 e9 00 00 00 85 c0 74 10 0f b6 02 84 c0 74 09 f3 90 0f b6 02 <84> c0 75 f7 b8 01 00 00 00 66 89 02 e9 54 dd 1d 00 8b 37 b8 00 02
2024-09-02T11:15:34.520041+02:00 lisa kernel: [ C4] RSP: 0018:ffffb64a45267d08 EFLAGS: 00000202
2024-09-02T11:15:34.520044+02:00 lisa kernel: [ C4] RAX: 0000000000000001 RBX: ffff9f0cd1187a38 RCX: 0000000000000000
2024-09-02T11:15:34.520046+02:00 lisa kernel: [ C4] RDX: ffff9f0cd1187a38 RSI: 0000000000000001 RDI: ffff9f0cd1187a38
2024-09-02T11:15:34.520048+02:00 lisa kernel: [ C4] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffffff8b0261c8
2024-09-02T11:15:34.520049+02:00 lisa kernel: [ C4] R10: 0000000000000001 R11: 0000000000000005 R12: ffffb64a45267d58
2024-09-02T11:15:34.520050+02:00 lisa kernel: [ C4] R13: ffff9f0cd1187700 R14: 0000000000000000 R15: ffff9f0c89b73c00
2024-09-02T11:15:34.520052+02:00 lisa kernel: [ C4] FS: 00007fde155f0740(0000) GS:ffff9f1b2e700000(0000) knlGS:0000000000000000
2024-09-02T11:15:34.520054+02:00 lisa kernel: [ C4] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
2024-09-02T11:15:34.520056+02:00 lisa kernel: [ C4] CR2: 00007fde157327b0 CR3: 000000018167a000 CR4: 0000000000750ef0
2024-09-02T11:15:34.520057+02:00 lisa kernel: [ C4] PKRU: 55555554
2024-09-02T11:15:34.520058+02:00 lisa kernel: [ C4] Call Trace:
2024-09-02T11:15:34.520060+02:00 lisa kernel: [ C4] <NMI>
2024-09-02T11:15:34.520062+02:00 lisa kernel: [ C4] ? nmi_cpu_backtrace.cold+0x32/0x63
2024-09-02T11:15:34.520064+02:00 lisa kernel: [ C4] ? nmi_cpu_backtrace_handler+0xc/0x20
2024-09-02T11:15:34.520066+02:00 lisa kernel: [ C4] ? nmi_handle+0x53/0xc0
2024-09-02T11:15:34.520068+02:00 lisa kernel: [ C4] ? default_do_nmi+0x40/0x260
2024-09-02T11:15:34.520069+02:00 lisa kernel: [ C4] ? exc_nmi+0xe0/0x110
2024-09-02T11:15:34.520072+02:00 lisa kernel: [ C4] ? end_repeat_nmi+0xf/0x41
2024-09-02T11:15:34.520074+02:00 lisa kernel: [ C4] ? queued_spin_lock_slowpath+0x46/0x1b0
2024-09-02T11:15:34.520075+02:00 lisa kernel: [ C4] ? queued_spin_lock_slowpath+0x46/0x1b0
2024-09-02T11:15:34.520077+02:00 lisa kernel: [ C4] ? queued_spin_lock_slowpath+0x46/0x1b0
2024-09-02T11:15:34.520078+02:00 lisa kernel: [ C4] </NMI>
2024-09-02T11:15:34.520080+02:00 lisa kernel: [ C4] <TASK>
2024-09-02T11:15:34.520081+02:00 lisa kernel: [ C4] ? fuse_iget+0x11c/0x250 [fuse]
I bisected the error to commit 5fb9c98e9d8d ("fuse: add support for no forget requests").
As a locking issue seemed likely I recompiled next-20240902 with CONFIG_LOCKDEP=y
and got this (in addition to the messages above)
2024-09-02T14:57:03.788867+02:00 lisa kernel: [ T1283] ============================================
2024-09-02T14:57:03.788870+02:00 lisa kernel: [ T1283] WARNING: possible recursive locking detected
2024-09-02T14:57:03.788871+02:00 lisa kernel: [ T1283] 6.11.0-rc6-next-20240902-debug #383 Not tainted
2024-09-02T14:57:03.788873+02:00 lisa kernel: [ T1283] --------------------------------------------
2024-09-02T14:57:03.788875+02:00 lisa kernel: [ T1283] fusermount3/1283 is trying to acquire lock:
2024-09-02T14:57:03.788877+02:00 lisa kernel: [ T1283] ffff951a718dfb40 (&fi->lock){+.+.}-{2:2}, at: fuse_iget+0x11c/0x250 [fuse]
2024-09-02T14:57:03.788880+02:00 lisa kernel: [ T1283]
2024-09-02T14:57:03.788882+02:00 lisa kernel: [ T1283] but task is already holding lock:
2024-09-02T14:57:03.788884+02:00 lisa kernel: [ T1283] ffff951a718dfb40 (&fi->lock){+.+.}-{2:2}, at: fuse_iget+0x10c/0x250 [fuse]
2024-09-02T14:57:03.788886+02:00 lisa kernel: [ T1283]
2024-09-02T14:57:03.788888+02:00 lisa kernel: [ T1283] other info that might help us debug this:
2024-09-02T14:57:03.788889+02:00 lisa kernel: [ T1283] Possible unsafe locking scenario:
2024-09-02T14:57:03.788891+02:00 lisa kernel: [ T1283]
2024-09-02T14:57:03.788893+02:00 lisa kernel: [ T1283] CPU0
2024-09-02T14:57:03.788895+02:00 lisa kernel: [ T1283] ----
2024-09-02T14:57:03.788897+02:00 lisa kernel: [ T1283] lock(&fi->lock);
2024-09-02T14:57:03.788899+02:00 lisa kernel: [ T1283] lock(&fi->lock);
2024-09-02T14:57:03.788900+02:00 lisa kernel: [ T1283]
2024-09-02T14:57:03.788903+02:00 lisa kernel: [ T1283] *** DEADLOCK ***
2024-09-02T14:57:03.788905+02:00 lisa kernel: [ T1283]
2024-09-02T14:57:03.788906+02:00 lisa kernel: [ T1283] May be due to missing lock nesting notation
2024-09-02T14:57:03.788908+02:00 lisa kernel: [ T1283]
2024-09-02T14:57:03.788910+02:00 lisa kernel: [ T1283] 2 locks held by fusermount3/1283:
2024-09-02T14:57:03.788912+02:00 lisa kernel: [ T1283] #0: ffff951a82ca70e0 (&type->s_umount_key#54/1){+.+.}-{3:3}, at: alloc_super+0xd4/0x3d0
2024-09-02T14:57:03.788913+02:00 lisa kernel: [ T1283] #1: ffff951a718dfb40 (&fi->lock){+.+.}-{2:2}, at: fuse_iget+0x10c/0x250 [fuse]
2024-09-02T14:57:03.788914+02:00 lisa kernel: [ T1283]
2024-09-02T14:57:03.788916+02:00 lisa kernel: [ T1283] stack backtrace:
2024-09-02T14:57:03.788918+02:00 lisa kernel: [ T1283] CPU: 0 UID: 0 PID: 1283 Comm: fusermount3 Not tainted 6.11.0-rc6-next-20240902-debug #383
2024-09-02T14:57:03.788920+02:00 lisa kernel: [ T1283] Hardware name: Micro-Star International Co., Ltd. Alpha 15 B5EEK/MS-158L, BIOS E158LAMS.107 11/10/2021
2024-09-02T14:57:03.788939+02:00 lisa kernel: [ T1283] Call Trace:
2024-09-02T14:57:03.788942+02:00 lisa kernel: [ T1283] <TASK>
2024-09-02T14:57:03.788944+02:00 lisa kernel: [ T1283] ? dump_stack_lvl+0x6d/0xb0
2024-09-02T14:57:03.788945+02:00 lisa kernel: [ T1283] ? print_deadlock_bug.cold+0xbd/0xcc
2024-09-02T14:57:03.788948+02:00 lisa kernel: [ T1283] ? __lock_acquire+0x14e6/0x2780
2024-09-02T14:57:03.788951+02:00 lisa kernel: [ T1283] ? lock_acquire+0xd5/0x300
2024-09-02T14:57:03.788953+02:00 lisa kernel: [ T1283] ? fuse_iget+0x11c/0x250 [fuse]
2024-09-02T14:57:03.788956+02:00 lisa kernel: [ T1283] ? fuse_iget+0x23c/0x250 [fuse]
2024-09-02T14:57:03.788959+02:00 lisa kernel: [ T1283] ? srso_alias_return_thunk+0x5/0xfbef5
2024-09-02T14:57:03.788961+02:00 lisa kernel: [ T1283] ? _raw_spin_lock+0x2b/0x40
2024-09-02T14:57:03.788979+02:00 lisa kernel: [ T1283] ? fuse_iget+0x11c/0x250 [fuse]
2024-09-02T14:57:03.788981+02:00 lisa kernel: [ T1283] ? fuse_iget+0x11c/0x250 [fuse]
2024-09-02T14:57:03.788996+02:00 lisa kernel: [ T1283] ? fuse_fill_super_common+0x32a/0x450 [fuse]
2024-09-02T14:57:03.788998+02:00 lisa kernel: [ T1283] ? fuse_fill_super_common+0x450/0x450 [fuse]
2024-09-02T14:57:03.789001+02:00 lisa kernel: [ T1283] ? fuse_fill_super+0x57/0x90 [fuse]
2024-09-02T14:57:03.789004+02:00 lisa kernel: [ T1283] ? get_tree_nodev+0x67/0x90
2024-09-02T14:57:03.789006+02:00 lisa kernel: [ T1283] ? fuse_get_tree+0xc3/0x1a0 [fuse]
2024-09-02T14:57:03.789008+02:00 lisa kernel: [ T1283] ? vfs_get_tree+0x27/0xe0
2024-09-02T14:57:03.789011+02:00 lisa kernel: [ T1283] ? path_mount+0x483/0xba0
2024-09-02T14:57:03.789014+02:00 lisa kernel: [ T1283] ? __x64_sys_mount+0x103/0x140
2024-09-02T14:57:03.789015+02:00 lisa kernel: [ T1283] ? do_syscall_64+0x72/0x180
2024-09-02T14:57:03.789017+02:00 lisa kernel: [ T1283] ? entry_SYSCALL_64_after_hwframe+0x55/0x5d
2024-09-02T14:57:03.789020+02:00 lisa kernel: [ T1283] </TASK>
Reverting commit 5fb9c98e9d8d cleanly in next-20240902 is not possible, but I found
that the following patch fixes the issue for me:
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index f4fe9199c706..d62eb6edc0aa 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -484,7 +484,9 @@ struct inode *fuse_iget(struct super_block *sb, u64 nodeid,
}
}
fi = get_fuse_inode(inode);
- fuse_inc_nlookup(fc, fi);
+ spin_lock(&fi->lock);
+ fi->nlookup++;
+ spin_unlock(&fi->lock);
done:
fuse_change_attributes(inode, attr, NULL, attr_valid, attr_version);
Bert Karwatzki
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