Re: [PATCH][CIFS]Call close synchronously during unlink/rename/lease break.

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This is in http://smb3-test-rhel-75.southcentralus.cloudapp.azure.com/#/builders/2/builds/766

On Tue, Aug 10, 2021 at 2:28 PM Steve French <smfrench@xxxxxxxxx> wrote:
>
> I saw some test failures in
>
> and looking in /var/log/messages I see e.g.
>
> Aug 10 14:00:22 fedora29 systemd[1]: Started /usr/bin/bash -c exit 77.
> Aug 10 14:00:25 fedora29 kernel: kmemleak: 10 new suspected memory
> leaks (see /sys/kernel/debug/kmemleak)
> Aug 10 14:00:28 fedora29 kernel: kmemleak: 1 new suspected memory
> leaks (see /sys/kernel/debug/kmemleak)
> Aug 10 14:00:28 fedora29 kernel: CIFS: Attempting to mount
> \\win16.vm.test\Scratch
> Aug 10 14:00:28 fedora29 kernel: CIFS: Attempting to mount
> \\win16.vm.test\Scratch
> Aug 10 14:00:29 fedora29 root[6460]: run xfstest cifs/100
> Aug 10 14:00:29 fedora29 journal: run fstests cifs/100 at 2021-08-10 14:00:29
> Aug 10 14:00:29 fedora29 systemd[1]: Started /usr/bin/bash -c test -w
> /proc/self/oom_score_adj && echo 250 > /proc/self/oom_score_adj; exec
> ./tests/cifs/100.
> Aug 10 14:00:30 fedora29 kernel: general protection fault, probably
> for non-canonical address 0xdead000000000110: 0000 [#4] SMP PTI
> Aug 10 14:00:30 fedora29 kernel: CPU: 0 PID: 6624 Comm: rm Tainted: G
>     D           5.14.0-rc4 #1
> Aug 10 14:00:30 fedora29 kernel: Hardware name: Red Hat KVM, BIOS
> 0.5.1 01/01/2011
> Aug 10 14:00:30 fedora29 kernel: RIP:
> 0010:cifs_close_deferred_file+0x77/0x140 [cifs]
> Aug 10 14:00:30 fedora29 kernel: Code: 85 de 00 00 00 4c 89 ef e8 06
> 96 2e e8 48 8b 1c 24 4c 39 e3 74 55 49 bd 00 01 00 00 00 00 ad de 48
> bd 22 01 00 00 00 00 ad de <48> 8b 7b 10 31 d2 be 01 00 00 00 e8 a9 c5
> fe ff 48 89 df e8 61 46
> Aug 10 14:00:30 fedora29 kernel: RSP: 0018:ffffb121806dbdd0 EFLAGS: 00010287
> Aug 10 14:00:30 fedora29 kernel: RAX: ffff88dc55b8ca01 RBX:
> dead000000000100 RCX: 00000000000034d9
> Aug 10 14:00:30 fedora29 kernel: RDX: 00000000000034d8 RSI:
> 67739b6f43694caa RDI: 0000000000032080
>
> and
>
> Aug 10 14:00:30 fedora29 kernel: ---[ end trace b062b12a095f4dd5 ]---
> Aug 10 14:00:30 fedora29 kernel: RIP:
> 0010:cifs_close_deferred_file+0x77/0x140 [cifs]
> Aug 10 14:00:30 fedora29 kernel: Code: 85 de 00 00 00 4c 89 ef e8 06
> 96 2e e8 48 8b 1c 24 4c 39 e3 74 55 49 bd 00 01 00 00 00 00 ad de 48
> bd 22 01 00 00 00 00 ad de <48> 8b 7b 10 31 d2 be 01 00 00 00 e8 a9 c5
> fe ff 48 89 df e8 61 46
> Aug 10 14:00:30 fedora29 kernel: RSP: 0018:ffffb12180f0fc80 EFLAGS: 00010283
> Aug 10 14:00:30 fedora29 kernel: RAX: ffff88dc5b2ca201 RBX:
> dead000000000100 RCX: 0000000000002367
> Aug 10 14:00:30 fedora29 kernel: RDX: 0000000000002366 RSI:
> 67100f614dfd246a RDI: 0000000000032080
> Aug 10 14:00:30 fedora29 kernel: RBP: dead000000000122 R08:
> 0000000000000001 R09: 0000000000000001
> Aug 10 14:00:30 fedora29 kernel: R10: ffffb12180f0fba0 R11:
> 0000000000000001 R12: ffffb12180f0fc80
>
> On Tue, Aug 10, 2021 at 12:29 PM Rohith Surabattula
> <rohiths.msft@xxxxxxxxx> wrote:
> >
> > Hi All,
> >
> > Have updated the patch to fix the memleak.
> >
> > Regards,
> > Rohith
> >
> > On Tue, Aug 10, 2021 at 5:18 PM Shyam Prasad N <nspmangalore@xxxxxxxxx> wrote:
> > >
> > > Already gave my review comments along with this one to the other email.
> > >
> > > Reviewed-by: Shyam Prasad N <sprasad@xxxxxxxxxxxxx>
> > >
> > > On Mon, Aug 9, 2021 at 3:28 PM Rohith Surabattula
> > > <rohiths.msft@xxxxxxxxx> wrote:
> > > >
> > > > Hi Steve/All,
> > > >
> > > > During unlink/rename/lease break, deferred work for close is
> > > > scheduled immediately but in asynchronous manner which might
> > > > lead to race with actual(unlink/rename) commands.
> > > >
> > > > This change will schedule close synchronously which will avoid
> > > > the race conditions with other commands.
> > > >
> > > > Regards,
> > > > Rohith
> > >
> > >
> > >
> > > --
> > > Regards,
> > > Shyam
>
>
>
> --
> Thanks,
>
> Steve



-- 
Thanks,

Steve



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