linux-kernel - Mounting fuse with v4.11.0 produced WARNING in fs/super.c:1281 super_setup_bdi

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Message-ID: <CA+PODjo=Y6shdzyvneFTXnjnTVZB5ACuB6XaxPhGhrXAcc-gbQ@mail.gmail.com>
Date:   Tue, 2 May 2017 20:46:55 +0300
From:   Andrey Melnikov <temnota.am@...il.com>
To:     linux-kernel@...r.kernel.org, Miklos Szeredi <miklos@...redi.hu>
Subject: Mounting fuse with v4.11.0 produced WARNING in fs/super.c:1281 super_setup_bdi_name+0xcf/0xe0

Hello.

Mounting ntfs fs with fuse shows this warning in log:

[  761.948837] ------------[ cut here ]------------
[  761.948845] WARNING: CPU: 1 PID: 10879 at
/usr/src/ml-build/mainline/fs/super.c:1281
super_setup_bdi_name+0xcf/0xe0
[  761.948846] Modules linked in: nouveau mxm_wmi wmi ttm
drm_kms_helper drm i2c_algo_bit fb_sys_fops syscopyarea sysfillrect
sysimgblt iptable_filter ip6t_MASQUERADE nf_nat_masquerade_ipv6
ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6_tables
ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_conntrack_ipv4
nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack bridge stp llc usblp
intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp joydev
input_leds kvm_intel kvm uvcvideo snd_usb_audio snd_usbmidi_lib
snd_rawmidi videobuf2_vmalloc snd_seq_device videobuf2_memops
irqbypass videobuf2_v4l2 videobuf2_core crct10dif_pclmul crc32_pclmul
videodev media pl2303 usbserial ghash_clmulni_intel asix usbnet mii
snd_hda_codec_hdmi pcbc aesni_intel snd_hda_codec_via
snd_hda_codec_generic snd_hda_intel
[  761.948875]  aes_x86_64 snd_hda_codec snd_hda_core crypto_simd
snd_hwdep snd_pcm glue_helper cryptd snd_timer mei_me shpchp
ie31200_edac snd intel_cstate soundcore mei intel_rapl_perf serio_raw
pcspkr mac_hid tpm_infineon lpc_ich video binfmt_misc overlay
parport_pc ppdev lp parport ip_tables x_tables autofs4 raid10 raid456
async_raid6_recov async_memcpy async_pq async_xor async_tx xor
raid6_pq libcrc32c raid1 multipath linear raid0 usbkbd usbmouse
hid_generic usbhid hid uas usb_storage psmouse i2c_i801 ahci libahci
atl1c
[  761.948902] CPU: 1 PID: 10879 Comm: mount.ntfs Not tainted
4.11.0-999-generic #201705012201
[  761.948903] Hardware name: Gigabyte Technology Co., Ltd. To be
filled by O.E.M./Z77M-D3H, BIOS F15a 12/31/2013
[  761.948905] task: ffff904556935a00 task.stack: ffffa4d98a734000
[  761.948907] RIP: 0010:super_setup_bdi_name+0xcf/0xe0
[  761.948908] RSP: 0018:ffffa4d98a737c50 EFLAGS: 00010283
[  761.948910] RAX: 0000000000000000 RBX: ffff9045491e5c00 RCX: 0000000000000002
[  761.948911] RDX: 0000000000000001 RSI: 00000000fffffe01 RDI: ffffffff84bd584b
[  761.948912] RBP: ffffa4d98a737cd0 R08: ffff90455ce193f8 R09: 0000000000000000
[  761.948913] R10: ffffdbaed3cdaa00 R11: 0000000000000000 R12: ffff904574d1d800
[  761.948914] R13: ffffffff856d40a3 R14: ffffa4d98a737ce0 R15: ffff9045491f9c00
[  761.948916] FS:  00007f25de2aae80(0000) GS:ffff9045aec40000(0000)
knlGS:0000000000000000
[  761.948917] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  761.948918] CR2: 00007fff5e2e6c0c CR3: 00000004f9a42000 CR4: 00000000001406e0
[  761.948919] Call Trace:
[  761.948923]  ? kmem_cache_alloc_trace+0xd7/0x190
[  761.948927]  fuse_fill_super+0x3b3/0x6a0
[  761.948929]  ? vsnprintf+0x24b/0x4d0
[  761.948931]  ? snprintf+0x45/0x70
[  761.948933]  mount_bdev+0x178/0x1b0
[  761.948934]  ? mount_bdev+0x178/0x1b0
[  761.948936]  ? fuse_get_root_inode+0x70/0x70
[  761.948938]  fuse_mount_blk+0x15/0x20
[  761.948939]  mount_fs+0x38/0x140
[  761.948942]  vfs_kern_mount+0x67/0x110
[  761.948943]  do_mount+0x1e1/0xca0
[  761.948945]  ? __check_object_size+0x100/0x19d
[  761.948948]  ? refcount_dec_not_one+0x41/0x50
[  761.948950]  ? kmem_cache_alloc_trace+0xd7/0x190
[  761.948951]  SyS_mount+0x83/0xd0
[  761.948954]  entry_SYSCALL_64_fastpath+0x1e/0xa9
[  761.948956] RIP: 0033:0x7f25dd7940ba
[  761.948957] RSP: 002b:00007fff5e2e8318 EFLAGS: 00000246 ORIG_RAX:
00000000000000a5
[  761.948958] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 00007f25dd7940ba
[  761.948960] RDX: 000055b7babb2af0 RSI: 000055b7babb2be0 RDI: 000055b7babadc20
[  761.948961] RBP: 00007fff5e2e70b0 R08: 000055b7babb2c10 R09: 0000000000000030
[  761.948962] R10: 0000000000000006 R11: 0000000000000246 R12: 00007fff5e2e70c0
[  761.948963] R13: 000055b7b8d7f10f R14: 00007fff5e2e71f8 R15: 0000000000000001
[  761.948964] Code: a0 65 48 33 0c 25 28 00 00 00 75 2a 48 83 c4 58
5b 41 5a 41 5c 41 5d 41 5e 5d c3 48 89 df 89 45 84 e8 96 14 f9 ff 8b
45 84 eb d2 <0f> ff eb c6 b8 f4 ff ff ff eb c7 e8 11 fe e3 ff 90 0f 1f
44 00
[  761.948987] ---[ end trace 341b61fc898ee318 ]---