From: Sasha Levin <sashal@kernel.org>
To: dsterba@suse.cz, linux-kernel@vger.kernel.org,
stable@vger.kernel.org, Qu Wenruo <wqu@suse.com>,
David Sterba <dsterba@suse.com>,
linux-btrfs@vger.kernel.org
Subject: Re: [PATCH AUTOSEL 5.11 26/44] btrfs: track qgroup released data in own variable in insert_prealloc_file_extent
Date: Tue, 30 Mar 2021 17:15:10 -0400 [thread overview]
Message-ID: <YGOU3rct+jbzVi8R@sashalap> (raw)
In-Reply-To: <20210325120802.GK7604@twin.jikos.cz>
On Thu, Mar 25, 2021 at 01:08:02PM +0100, David Sterba wrote:
>On Thu, Mar 25, 2021 at 07:24:41AM -0400, Sasha Levin wrote:
>> From: Qu Wenruo <wqu@suse.com>
>>
>> [ Upstream commit fbf48bb0b197e6894a04c714728c952af7153bf3 ]
>>
>> There is a piece of weird code in insert_prealloc_file_extent(), which
>> looks like:
>>
>> ret = btrfs_qgroup_release_data(inode, file_offset, len);
>> if (ret < 0)
>> return ERR_PTR(ret);
>> if (trans) {
>> ret = insert_reserved_file_extent(trans, inode,
>> file_offset, &stack_fi,
>> true, ret);
>> ...
>> }
>> extent_info.is_new_extent = true;
>> extent_info.qgroup_reserved = ret;
>> ...
>>
>> Note how the variable @ret is abused here, and if anyone is adding code
>> just after btrfs_qgroup_release_data() call, it's super easy to
>> overwrite the @ret and cause tons of qgroup related bugs.
>>
>> Fix such abuse by introducing new variable @qgroup_released, so that we
>> won't reuse the existing variable @ret.
>>
>> Signed-off-by: Qu Wenruo <wqu@suse.com>
>> Reviewed-by: David Sterba <dsterba@suse.com>
>> Signed-off-by: David Sterba <dsterba@suse.com>
>> Signed-off-by: Sasha Levin <sashal@kernel.org>
>
>This patch is a preparatory work and does not make sense for backport
>standalone. Either this one plus
>https://lore.kernel.org/linux-btrfs/20210303104152.105877-2-wqu@suse.com/
>or neither. And IIRC it does not apply directly and needs some
>additional review before it can be backported to older code base, so it
>has no CC: stable tags.
I'll drop it, thanks!
--
Thanks,
Sasha
next prev parent reply other threads:[~2021-03-30 21:15 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-25 11:24 [PATCH AUTOSEL 5.11 01/44] virtiofs: Fail dax mount if device does not support it Sasha Levin
2021-03-25 11:24 ` [PATCH AUTOSEL 5.11 02/44] ext4: shrink race window in ext4_should_retry_alloc() Sasha Levin
2021-03-25 11:24 ` [PATCH AUTOSEL 5.11 03/44] ext4: add reclaim checks to xattr code Sasha Levin
2021-03-25 14:30 ` Jan Kara
2021-03-30 21:14 ` Sasha Levin
2021-03-25 11:24 ` [PATCH AUTOSEL 5.11 04/44] fs/ext4: fix integer overflow in s_log_groups_per_flex Sasha Levin
2021-03-25 11:24 ` [PATCH AUTOSEL 5.11 05/44] ext4: fix bh ref count on error paths Sasha Levin
2021-03-25 11:24 ` [PATCH AUTOSEL 5.11 06/44] fs: nfsd: fix kconfig dependency warning for NFSD_V4 Sasha Levin
2021-03-25 11:24 ` [PATCH AUTOSEL 5.11 07/44] rpc: fix NULL dereference on kmalloc failure Sasha Levin
2021-03-25 11:24 ` [PATCH AUTOSEL 5.11 08/44] iomap: Fix negative assignment to unsigned sis->pages in iomap_swapfile_activate Sasha Levin
2021-03-25 11:24 ` [PATCH AUTOSEL 5.11 09/44] ASoC: rt1015: fix i2c communication error Sasha Levin
2021-03-25 11:24 ` [PATCH AUTOSEL 5.11 10/44] ASoC: rt5640: Fix dac- and adc- vol-tlv values being off by a factor of 10 Sasha Levin
2021-03-25 11:24 ` [PATCH AUTOSEL 5.11 11/44] ASoC: rt5651: " Sasha Levin
2021-03-25 11:24 ` [PATCH AUTOSEL 5.11 12/44] ASoC: sgtl5000: set DAP_AVC_CTRL register to correct default value on probe Sasha Levin
2021-03-25 11:24 ` [PATCH AUTOSEL 5.11 13/44] ASoC: es8316: Simplify adc_pga_gain_tlv table Sasha Levin
2021-03-25 11:24 ` [PATCH AUTOSEL 5.11 14/44] ASoC: soc-core: Prevent warning if no DMI table is present Sasha Levin
2021-03-25 11:24 ` [PATCH AUTOSEL 5.11 15/44] ASoC: cs42l42: Fix Bitclock polarity inversion Sasha Levin
2021-03-25 11:24 ` [PATCH AUTOSEL 5.11 16/44] ASoC: cs42l42: Fix channel width support Sasha Levin
2021-03-25 11:24 ` [PATCH AUTOSEL 5.11 17/44] ASoC: cs42l42: Fix mixer volume control Sasha Levin
2021-03-25 11:24 ` [PATCH AUTOSEL 5.11 18/44] ASoC: cs42l42: Always wait at least 3ms after reset Sasha Levin
2021-03-25 11:24 ` [PATCH AUTOSEL 5.11 19/44] NFSD: fix error handling in NFSv4.0 callbacks Sasha Levin
2021-03-25 11:24 ` [PATCH AUTOSEL 5.11 20/44] ASoC: mediatek: mt8192: fix tdm out data is valid on rising edge Sasha Levin
2021-03-25 11:24 ` [PATCH AUTOSEL 5.11 21/44] kernel: freezer should treat PF_IO_WORKER like PF_KTHREAD for freezing Sasha Levin
2021-03-25 11:24 ` [PATCH AUTOSEL 5.11 22/44] powerpc: Force inlining of cpu_has_feature() to avoid build failure Sasha Levin
2021-03-25 11:24 ` [PATCH AUTOSEL 5.11 23/44] vhost: Fix vhost_vq_reset() Sasha Levin
2021-03-25 11:24 ` [PATCH AUTOSEL 5.11 24/44] io_uring: fix ->flags races by linked timeouts Sasha Levin
2021-03-25 11:24 ` [PATCH AUTOSEL 5.11 25/44] io_uring: halt SQO submission on ctx exit Sasha Levin
2021-03-25 11:24 ` [PATCH AUTOSEL 5.11 26/44] btrfs: track qgroup released data in own variable in insert_prealloc_file_extent Sasha Levin
2021-03-25 12:08 ` David Sterba
2021-03-30 21:15 ` Sasha Levin [this message]
2021-03-25 11:24 ` [PATCH AUTOSEL 5.11 27/44] scsi: st: Fix a use after free in st_open() Sasha Levin
2021-03-25 11:24 ` [PATCH AUTOSEL 5.11 28/44] scsi: qla2xxx: Fix broken #endif placement Sasha Levin
2021-03-25 11:24 ` [PATCH AUTOSEL 5.11 29/44] staging: comedi: cb_pcidas: fix request_irq() warn Sasha Levin
2021-03-25 11:24 ` [PATCH AUTOSEL 5.11 30/44] staging: comedi: cb_pcidas64: " Sasha Levin
2021-03-25 11:24 ` [PATCH AUTOSEL 5.11 31/44] ASoC: rt5659: Update MCLK rate in set_sysclk() Sasha Levin
2021-03-25 11:24 ` [PATCH AUTOSEL 5.11 32/44] ASoC: rt711: add snd_soc_component remove callback Sasha Levin
2021-03-25 11:24 ` [PATCH AUTOSEL 5.11 33/44] thermal/core: Add NULL pointer check before using cooling device stats Sasha Levin
2021-03-25 11:24 ` [PATCH AUTOSEL 5.11 34/44] locking/ww_mutex: Simplify use_ww_ctx & ww_ctx handling Sasha Levin
2021-03-25 11:24 ` [PATCH AUTOSEL 5.11 35/44] locking/ww_mutex: Fix acquire/release imbalance in ww_acquire_init()/ww_acquire_fini() Sasha Levin
2021-03-25 11:24 ` [PATCH AUTOSEL 5.11 36/44] nvmet-tcp: fix kmap leak when data digest in use Sasha Levin
2021-03-25 11:24 ` [PATCH AUTOSEL 5.11 37/44] io_uring: imply MSG_NOSIGNAL for send[msg]()/recv[msg]() calls Sasha Levin
2021-03-25 11:24 ` [PATCH AUTOSEL 5.11 38/44] Revert "PM: ACPI: reboot: Use S5 for reboot" Sasha Levin
2021-03-25 11:24 ` [PATCH AUTOSEL 5.11 39/44] nouveau: Skip unvailable ttm page entries Sasha Levin
2021-03-25 11:24 ` [PATCH AUTOSEL 5.11 40/44] static_call: Align static_call_is_init() patching condition Sasha Levin
2021-03-25 11:24 ` [PATCH AUTOSEL 5.11 41/44] ext4: do not iput inode under running transaction in ext4_rename() Sasha Levin
2021-03-25 11:24 ` [PATCH AUTOSEL 5.11 42/44] signal: don't allow sending any signals to PF_IO_WORKER threads Sasha Levin
2021-03-25 11:32 ` Stefan Metzmacher
2021-03-25 11:24 ` [PATCH AUTOSEL 5.11 43/44] signal: don't allow STOP on " Sasha Levin
2021-03-25 11:34 ` Stefan Metzmacher
2021-03-25 12:04 ` Eric W. Biederman
2021-03-25 12:11 ` Stefan Metzmacher
2021-03-25 13:38 ` Jens Axboe
2021-03-25 13:56 ` Stefan Metzmacher
2021-03-25 14:02 ` Jens Axboe
2021-03-25 15:00 ` Sasha Levin
2021-03-25 15:10 ` Jens Axboe
2021-03-25 11:24 ` [PATCH AUTOSEL 5.11 44/44] io_uring: call req_set_fail_links() on short send[msg]()/recv[msg]() with MSG_WAITALL Sasha Levin
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