I noticed that if I mount the same share twice (to different target
directories) I get the warning below. Is that expected?
[ 252.630353] CIFS: Attempting to mount \\localhost\test
[ 252.633852] CIFS: VFS: res_id 0 create_time 0 serial_num -1431103150
[ 265.070509] CIFS: Attempting to mount \\localhost\test
[ 265.073639] CIFS: VFS: res_id 536871040 create_time 0 serial_num -1431103150
[ 265.073655] FS-Cache: Duplicate cookie detected
[ 265.073659] FS-Cache: O-cookie c=0000000a [p=00000008 fl=222 nc=0 na=1]
[ 265.073667] FS-Cache: O-cookie d=000000002ca0ccf2{CIFS.super}
n=00000000bcb568a0
[ 265.073675] FS-Cache: O-key=[4] '74657374'
[ 265.073686] FS-Cache: N-cookie c=0000000b [p=00000008 fl=2 nc=0
na=1][ 252.630353] CIFS: Attempting to mount \\localhost\test
[ 252.633852] CIFS: VFS: res_id 0 create_time 0 serial_num -1431103150
[ 265.070509] CIFS: Attempting to mount \\localhost\test
[ 265.073639] CIFS: VFS: res_id 536871040 create_time 0 serial_num -1431103150
[ 265.073655] FS-Cache: Duplicate cookie detected
[ 265.073659] FS-Cache: O-cookie c=0000000a [p=00000008 fl=222 nc=0 na=1]
[ 265.073667] FS-Cache: O-cookie d=000000002ca0ccf2{CIFS.super}
n=00000000bcb568a0
[ 265.073675] FS-Cache: O-key=[4] '74657374'
[ 265.073686] FS-Cache: N-cookie c=0000000b [p=00000008 fl=2 nc=0 na=1]
[ 265.073693] FS-Cache: N-cookie d=000000002ca0ccf2{CIFS.super}
n=00000000bcb568a0
[ 265.073698] FS-Cache: N-key=[4] '74657374'
[ 265.073693] FS-Cache: N-cookie d=000000002ca0ccf2{CIFS.super}
n=00000000bcb568a0
[ 265.073698] FS-Cache: N-key=[4] '74657374'
And then when I do unmount of the first it works, but unmount of the
second oopses.
[ 395.748231] ------------[ cut here ]------------
[ 395.748235] kernel BUG at fs/fscache/cookie.c:730!
[ 395.748252] invalid opcode: 0000 [#1] SMP PTI
[ 395.748265] CPU: 9 PID: 3940 Comm: umount Tainted: G OE
5.15.0-051500-generic #202110312130
[ 395.748278] Hardware name: LENOVO 20MAS08500/20MAS08500, BIOS
N2CET54W (1.37 ) 06/20/2020
[ 395.748285] RIP: 0010:__fscache_disable_cookie.cold+0x10/0x3e [fscache]
[ 395.748334] Code: 81 fc cc 0f b6 73 70 ba 01 00 00 00 48 c7 c7 18
c6 64 c1 e8 7b 81 fc cc 0f 0b 48 8b 73 20 48 c7 c7 60 c6 64 c1 e8 69
81 fc cc <0f> 0b 48 c7 c7 c8 cf 64 c1 e8 5b 81 fc cc 48 c7 c7 d6 cf 64
c1 e8
[ 395.748346] RSP: 0018:ffffb4c381ee7c48 EFLAGS: 00010246
[ 395.748359] RAX: 0000000000000031 RBX: ffff910337d4df30 RCX: 0000000000000000
[ 395.748368] RDX: 0000000000000000 RSI: ffff910a7bc589c0 RDI: ffff910a7bc589c0
[ 395.748377] RBP: ffffb4c381ee7cc0 R08: 0000000000000000 R09: ffffb4c381ee7a48
[ 395.748385] R10: ffffb4c381ee7a40 R11: ffffffff8f956108 R12: 0000000000000000
[ 395.748393] R13: 0000000000000000 R14: 0000000000000019 R15: 0000000000000000
[ 395.748401] FS: 00007fe4482b0800(0000) GS:ffff910a7bc40000(0000)
knlGS:0000000000000000
[ 395.748412] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 395.748421] CR2: 0000562446871c08 CR3: 00000001ba3a2006 CR4: 00000000003706e0
[ 395.748430] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 395.748437] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 395.748445] Call Trace:
[ 395.748454] ? kfree+0x346/0x3c0
[ 395.748473] ? cifs_crypto_secmech_release+0x155/0x170 [cifs]
[ 395.748660] __fscache_relinquish_cookie+0x50/0x100 [fscache]
[ 395.748694] cifs_fscache_release_client_cookie+0x2d/0x90 [cifs]
[ 395.748892] cifs_put_tcp_session+0xe7/0x180 [cifs]
[ 395.749048] cifs_put_smb_ses+0x156/0x3e0 [cifs]
[ 395.749205] cifs_put_tcon.part.0+0xdd/0x220 [cifs]
[ 395.749360] cifs_put_tlink+0x4a/0x70 [cifs]
[ 395.749516] cifs_umount+0x5b/0xb0 [cifs]
[ 395.749671] cifs_kill_sb+0x89/0xa0 [cifs]
[ 395.749823] deactivate_locked_super+0x3b/0xb0
[ 395.749838] deactivate_super+0x40/0x50
[ 395.749850] cleanup_mnt+0x146/0x1a0
[ 395.749861] __cleanup_mnt+0x12/0x20
[ 395.749870] task_work_run+0x6d/0xa0
[ 395.749882] exit_to_user_mode_loop+0x150/0x160
[ 395.749896] exit_to_user_mode_prepare+0x9c/0xb0
[ 395.749908] syscall_exit_to_user_mode+0x27/0x50
[ 395.749921] do_syscall_64+0x69/0xc0
[ 395.749935] ? irqentry_exit+0x19/0x30
[ 395.749945] ? exc_page_fault+0x89/0x160
[ 395.749955] ? asm_exc_page_fault+0x8/0x30
[ 395.749968] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 395.749981] RIP: 0033:0x7fe4484d2a1b
[ 395.749992] Code: 1b f4 0e 00 f7 d8 64 89 01 48 83 c8 ff c3 90 f3
0f 1e fa 31 f6 e9 05 00 00 00 0f 1f 44 00 00 f3 0f 1e fa b8 a6 00 00
00 0f 05 <48> 3d 00 f0 ff ff 77 05 c3 0f 1f 40 00 48 8b 15 e1 f3 0e 00
f7 d8
[ 395.750003] RSP: 002b:00007ffe50d84af8 EFLAGS: 00000246 ORIG_RAX:
00000000000000a6
[ 395.750017] RAX: 0000000000000000 RBX: 000055de5eefcc60 RCX: 00007fe4484d2a1b
[ 395.750025] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000055de5ef00910
[ 395.750033] RBP: 000055de5eefca30 R08: 0000000000000000 R09: 00007ffe50d83880
[ 395.750041] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[ 395.750048] R13: 000055de5ef00910 R14: 000055de5eefcb40 R15: 000055de5eefca30
[36461.874600] RIP: 0010:__fscache_disable_cookie.cold+0x10/0x3e [fscache]
[36461.874643] Code: c1 fe da 0f b6 73 70 ba 01 00 00 00 48 c7 c7 18
86 62 c1 e8 7b c1 fe da 0f 0b 48 8b 73 20 48 c7 c7 60 86 62 c1 e8 69
c1 fe da <0f> 0b 48 c7 c7 c8 8f 62 c1 e8 5b c1 fe da 48 c7 c7 d6 8f 62
c1 e8
[36461.874646] RSP: 0018:ffffaf6e8256bbd8 EFLAGS: 00010246
[36461.874648] RAX: 0000000000000031 RBX: ffff8dd26e381d80 RCX: 0000000000000000
[36461.874650] RDX: 0000000000000000 RSI: ffff8dd87bb189c0 RDI: ffff8dd87bb189c0
[36461.874651] RBP: ffffaf6e8256bc50 R08: 0000000000000000 R09: ffffaf6e8256b9d8
[36461.874653] R10: ffffaf6e8256b9d0 R11: ffffffff9d92f468 R12: 0000000000000000
[36461.874654] R13: 0000000000000000 R14: 0000000000000017 R15: 0000000000000000
[36461.874655] FS: 00007f6d6f3a1800(0000) GS:ffff8dd87bb00000(0000)
knlGS:0000000000000000
[36461.874657] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[36461.874659] CR2: 0000555ca5b280d0 CR3: 00000001828e8006 CR4: 00000000003706e0
[36461.874660] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[36461.874661] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 000000000000040
--
Thanks,
Steve
