* Re: Kernel RIP 0010:cifs_flush_folio
[not found] <CA+EPQ66bhvV_Wr2PE=bQQwcYbfvXCAn_TyAoHdD9fSfahsgG0Q@mail.gmail.com>
@ 2024-04-25 6:23 ` Steve French
[not found] ` <CA+EPQ664FHmSU-XW2e63jz1hEYNYVS-RdY6309g7-hvUMdt5Ew@mail.gmail.com>
0 siblings, 1 reply; 2+ messages in thread
From: Steve French @ 2024-04-25 6:23 UTC (permalink / raw)
To: Ritvik Budhiraja; +Cc: linux-cifs, Shyam Prasad, sprasad, David Howells
That is plausible that it is the same bug as in the report. What
kernel version is the xfstest failure on (and which xfstest)?
Presumably this does not fail with recent kernels (e.g. 6.7 or later) correct?
Since this is clone range (which not all servers support), what is the
target server (ksmbd? Samba on btrfs? Windows on REFS?)
On Thu, Apr 25, 2024 at 1:14 AM Ritvik Budhiraja
<budhirajaritviksmb@gmail.com> wrote:
>
> Hi Steve,
> While investigating xnfstest results I came across the below kernel oops. I have seen this in some of the xfstest failures. I wanted to know if this is a known issue?
>
> I have identified a similar ubuntu bug: Bug #2060919 “cifs: Copying file to same directory results in pa...” : Bugs : linux package : Ubuntu (launchpad.net)
>
> Reference dmesg logs:
> BUG: unable to handle page fault for address: fffffffffffffffe
> [Tue Apr 23 09:22:02 2024] #PF: supervisor read access in kernel mode
> [Tue Apr 23 09:22:02 2024] #PF: error_code(0x0000) - not-present page
> [Tue Apr 23 09:22:02 2024] PGD 19d43b067 P4D 19d43b067 PUD 19d43d067 PMD 0
> [Tue Apr 23 09:22:02 2024] Oops: 0000 [#68] SMP NOPTI
> [Tue Apr 23 09:22:02 2024] CPU: 1 PID: 3856364 Comm: fsstress Tainted: G D 6.5.0-1018-azure #19~22.04.2-Ubuntu
> [Tue Apr 23 09:22:03 2024] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS Hyper-V UEFI Release v4.1 11/28/2023
> [Tue Apr 23 09:22:03 2024] RIP: 0010:cifs_flush_folio+0x41/0xe0 [cifs]
> [Tue Apr 23 09:22:03 2024] Code: 49 89 cd 31 c9 41 54 53 48 89 f3 48 c1 ee 0c 48 83 ec 10 48 8b 7f 30 44 89 45 d4 e8 29 61 8e c6 49 89 c4 31 c0 4d 85 e4 74 7d <49> 8b 14 24 b8 00 10 00 00 f7 c2 00 00 01 00 74 12 41 0f b6 4c 24
> [Tue Apr 23 09:22:03 2024] RSP: 0018:ffffb182c3d3fcc0 EFLAGS: 00010282
> [Tue Apr 23 09:22:03 2024] RAX: 0000000000000000 RBX: 0000000011d00000 RCX: 0000000000000000
> [Tue Apr 23 09:22:03 2024] RDX: 0000000000000000 RSI: 0000000000011d00 RDI: ffffb182c3d3fc10
> [Tue Apr 23 09:22:03 2024] RBP: ffffb182c3d3fcf8 R08: 0000000000000001 R09: 0000000000000000
> [Tue Apr 23 09:22:03 2024] R10: 0000000011cfffff R11: 0000000000000000 R12: fffffffffffffffe
> [Tue Apr 23 09:22:03 2024] R13: ffffb182c3d3fd48 R14: ffff994311023c30 R15: ffffb182c3d3fd40
> [Tue Apr 23 09:22:03 2024] FS: 00007c82b3e10740(0000) GS:ffff9944b7d00000(0000) knlGS:0000000000000000
> [Tue Apr 23 09:22:03 2024] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [Tue Apr 23 09:22:03 2024] CR2: fffffffffffffffe CR3: 00000001acb52000 CR4: 0000000000350ee0
> [Tue Apr 23 09:22:03 2024] Call Trace:
> [Tue Apr 23 09:22:03 2024] <TASK>
> [Tue Apr 23 09:22:03 2024] ? show_regs+0x6a/0x80
> [Tue Apr 23 09:22:03 2024] ? __die+0x25/0x70
> [Tue Apr 23 09:22:03 2024] ? page_fault_oops+0x79/0x180
> [Tue Apr 23 09:22:03 2024] ? srso_return_thunk+0x5/0x10
> [Tue Apr 23 09:22:03 2024] ? search_exception_tables+0x61/0x70
> [Tue Apr 23 09:22:03 2024] ? srso_return_thunk+0x5/0x10
> [Tue Apr 23 09:22:03 2024] ? kernelmode_fixup_or_oops+0xa2/0x120
> [Tue Apr 23 09:22:03 2024] ? __bad_area_nosemaphore+0x16f/0x280
> [Tue Apr 23 09:22:03 2024] ? terminate_walk+0x97/0xf0
> [Tue Apr 23 09:22:03 2024] ? bad_area_nosemaphore+0x16/0x20
> [Tue Apr 23 09:22:03 2024] ? do_kern_addr_fault+0x62/0x80
> [Tue Apr 23 09:22:03 2024] ? exc_page_fault+0xdb/0x160
> [Tue Apr 23 09:22:03 2024] ? asm_exc_page_fault+0x27/0x30
> [Tue Apr 23 09:22:03 2024] ? cifs_flush_folio+0x41/0xe0 [cifs]
> [Tue Apr 23 09:22:03 2024] cifs_remap_file_range+0x16c/0x5e0 [cifs]
> [Tue Apr 23 09:22:03 2024] do_clone_file_range+0x107/0x290
> [Tue Apr 23 09:22:03 2024] vfs_clone_file_range+0x3f/0x120
> [Tue Apr 23 09:22:03 2024] ioctl_file_clone+0x4d/0xa0
> [Tue Apr 23 09:22:03 2024] do_vfs_ioctl+0x35c/0x860
> [Tue Apr 23 09:22:03 2024] __x64_sys_ioctl+0x73/0xd0
> [Tue Apr 23 09:22:03 2024] do_syscall_64+0x5c/0x90
> [Tue Apr 23 09:22:03 2024] ? srso_return_thunk+0x5/0x10
> [Tue Apr 23 09:22:03 2024] ? exc_page_fault+0x80/0x160
> [Tue Apr 23 09:22:03 2024] entry_SYSCALL_64_after_hwframe+0x6e/0xd8
--
Thanks,
Steve
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: Kernel RIP 0010:cifs_flush_folio
[not found] ` <CA+EPQ664FHmSU-XW2e63jz1hEYNYVS-RdY6309g7-hvUMdt5Ew@mail.gmail.com>
@ 2024-04-25 16:52 ` Shyam Prasad N
0 siblings, 0 replies; 2+ messages in thread
From: Shyam Prasad N @ 2024-04-25 16:52 UTC (permalink / raw)
To: Ritvik Budhiraja; +Cc: Steve French, linux-cifs, sprasad, David Howells
On Thu, Apr 25, 2024 at 12:05 PM Ritvik Budhiraja
<budhirajaritviksmb@gmail.com> wrote:
>
> The test that failed was generic/074, with: Output mismatch;
> Write failed at offset 9933824, Write failed at offset 9961472,
> Write failed at offset 9950208. The kernel version for the machine
> was Ubuntu 22.04, 6.5.0-1018-azure
>
> The target server was Azure Files XNFS
Correction. The server for the test that generated this stack would be
Azure Files SMB. Not NFS.
>
> On Thu, 25 Apr 2024 at 11:53, Steve French <smfrench@gmail.com> wrote:
>>
>> That is plausible that it is the same bug as in the report. What
>> kernel version is the xfstest failure on (and which xfstest)?
>>
>> Presumably this does not fail with recent kernels (e.g. 6.7 or later) correct?
>>
>> Since this is clone range (which not all servers support), what is the
>> target server (ksmbd? Samba on btrfs? Windows on REFS?)
>>
>> On Thu, Apr 25, 2024 at 1:14 AM Ritvik Budhiraja
>> <budhirajaritviksmb@gmail.com> wrote:
>> >
>> > Hi Steve,
>> > While investigating xnfstest results I came across the below kernel oops. I have seen this in some of the xfstest failures. I wanted to know if this is a known issue?
>> >
>> > I have identified a similar ubuntu bug: Bug #2060919 “cifs: Copying file to same directory results in pa...” : Bugs : linux package : Ubuntu (launchpad.net)
>> >
>> > Reference dmesg logs:
>> > BUG: unable to handle page fault for address: fffffffffffffffe
>> > [Tue Apr 23 09:22:02 2024] #PF: supervisor read access in kernel mode
>> > [Tue Apr 23 09:22:02 2024] #PF: error_code(0x0000) - not-present page
>> > [Tue Apr 23 09:22:02 2024] PGD 19d43b067 P4D 19d43b067 PUD 19d43d067 PMD 0
>> > [Tue Apr 23 09:22:02 2024] Oops: 0000 [#68] SMP NOPTI
>> > [Tue Apr 23 09:22:02 2024] CPU: 1 PID: 3856364 Comm: fsstress Tainted: G D 6.5.0-1018-azure #19~22.04.2-Ubuntu
>> > [Tue Apr 23 09:22:03 2024] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS Hyper-V UEFI Release v4.1 11/28/2023
>> > [Tue Apr 23 09:22:03 2024] RIP: 0010:cifs_flush_folio+0x41/0xe0 [cifs]
>> > [Tue Apr 23 09:22:03 2024] Code: 49 89 cd 31 c9 41 54 53 48 89 f3 48 c1 ee 0c 48 83 ec 10 48 8b 7f 30 44 89 45 d4 e8 29 61 8e c6 49 89 c4 31 c0 4d 85 e4 74 7d <49> 8b 14 24 b8 00 10 00 00 f7 c2 00 00 01 00 74 12 41 0f b6 4c 24
>> > [Tue Apr 23 09:22:03 2024] RSP: 0018:ffffb182c3d3fcc0 EFLAGS: 00010282
>> > [Tue Apr 23 09:22:03 2024] RAX: 0000000000000000 RBX: 0000000011d00000 RCX: 0000000000000000
>> > [Tue Apr 23 09:22:03 2024] RDX: 0000000000000000 RSI: 0000000000011d00 RDI: ffffb182c3d3fc10
>> > [Tue Apr 23 09:22:03 2024] RBP: ffffb182c3d3fcf8 R08: 0000000000000001 R09: 0000000000000000
>> > [Tue Apr 23 09:22:03 2024] R10: 0000000011cfffff R11: 0000000000000000 R12: fffffffffffffffe
>> > [Tue Apr 23 09:22:03 2024] R13: ffffb182c3d3fd48 R14: ffff994311023c30 R15: ffffb182c3d3fd40
>> > [Tue Apr 23 09:22:03 2024] FS: 00007c82b3e10740(0000) GS:ffff9944b7d00000(0000) knlGS:0000000000000000
>> > [Tue Apr 23 09:22:03 2024] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
>> > [Tue Apr 23 09:22:03 2024] CR2: fffffffffffffffe CR3: 00000001acb52000 CR4: 0000000000350ee0
>> > [Tue Apr 23 09:22:03 2024] Call Trace:
>> > [Tue Apr 23 09:22:03 2024] <TASK>
>> > [Tue Apr 23 09:22:03 2024] ? show_regs+0x6a/0x80
>> > [Tue Apr 23 09:22:03 2024] ? __die+0x25/0x70
>> > [Tue Apr 23 09:22:03 2024] ? page_fault_oops+0x79/0x180
>> > [Tue Apr 23 09:22:03 2024] ? srso_return_thunk+0x5/0x10
>> > [Tue Apr 23 09:22:03 2024] ? search_exception_tables+0x61/0x70
>> > [Tue Apr 23 09:22:03 2024] ? srso_return_thunk+0x5/0x10
>> > [Tue Apr 23 09:22:03 2024] ? kernelmode_fixup_or_oops+0xa2/0x120
>> > [Tue Apr 23 09:22:03 2024] ? __bad_area_nosemaphore+0x16f/0x280
>> > [Tue Apr 23 09:22:03 2024] ? terminate_walk+0x97/0xf0
>> > [Tue Apr 23 09:22:03 2024] ? bad_area_nosemaphore+0x16/0x20
>> > [Tue Apr 23 09:22:03 2024] ? do_kern_addr_fault+0x62/0x80
>> > [Tue Apr 23 09:22:03 2024] ? exc_page_fault+0xdb/0x160
>> > [Tue Apr 23 09:22:03 2024] ? asm_exc_page_fault+0x27/0x30
>> > [Tue Apr 23 09:22:03 2024] ? cifs_flush_folio+0x41/0xe0 [cifs]
>> > [Tue Apr 23 09:22:03 2024] cifs_remap_file_range+0x16c/0x5e0 [cifs]
>> > [Tue Apr 23 09:22:03 2024] do_clone_file_range+0x107/0x290
>> > [Tue Apr 23 09:22:03 2024] vfs_clone_file_range+0x3f/0x120
>> > [Tue Apr 23 09:22:03 2024] ioctl_file_clone+0x4d/0xa0
>> > [Tue Apr 23 09:22:03 2024] do_vfs_ioctl+0x35c/0x860
>> > [Tue Apr 23 09:22:03 2024] __x64_sys_ioctl+0x73/0xd0
>> > [Tue Apr 23 09:22:03 2024] do_syscall_64+0x5c/0x90
>> > [Tue Apr 23 09:22:03 2024] ? srso_return_thunk+0x5/0x10
>> > [Tue Apr 23 09:22:03 2024] ? exc_page_fault+0x80/0x160
>> > [Tue Apr 23 09:22:03 2024] entry_SYSCALL_64_after_hwframe+0x6e/0xd8
>>
>>
>>
>> --
>> Thanks,
>>
>> Steve
I reviewed the launchpad bug. This problem seems to be well understood.
The problem seems to be well understood:
>>> Since the Ubuntu mantic kernel consumes both 6.1.y and 6.7.y / 6.8.y stable patches, this patch was applied to mantic's 6.5 kernel by mistake, and contains the wrong logic for how __filemap_get_folio() works in 6.5.
So the order of backport application seems to have led to this problem.
--
Regards,
Shyam
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2024-04-25 6:23 ` Kernel RIP 0010:cifs_flush_folio Steve French
[not found] ` <CA+EPQ664FHmSU-XW2e63jz1hEYNYVS-RdY6309g7-hvUMdt5Ew@mail.gmail.com>
2024-04-25 16:52 ` Shyam Prasad N
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