August 2020 - Linux-stable-mirror

FAILED: patch "[PATCH] iio: imu: st_lsm6dsx: reset hw ts after resume" failed to apply to 5.4-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From a1bab9396c2d98c601ce81c27567159dfbc10c19 Mon Sep 17 00:00:00 2001 From: Lorenzo Bianconi <lorenzo(a)kernel.org> Date: Mon, 13 Jul 2020 13:40:19 +0200 Subject: [PATCH] iio: imu: st_lsm6dsx: reset hw ts after resume Reset hw time samples generator after system resume in order to avoid disalignment between system and device time reference since FIFO batching and time samples generator are disabled during suspend. Fixes: 213451076bd3 ("iio: imu: st_lsm6dsx: add hw timestamp support") Tested-by: Sean Nyekjaer <sean(a)geanix.com> Signed-off-by: Lorenzo Bianconi <lorenzo(a)kernel.org> Cc: <Stable(a)vger.kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron(a)huawei.com> diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h index d82ec6398222..d80ba2e688ed 100644 --- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h @@ -436,8 +436,7 @@ int st_lsm6dsx_update_watermark(struct st_lsm6dsx_sensor *sensor, u16 watermark); int st_lsm6dsx_update_fifo(struct st_lsm6dsx_sensor *sensor, bool enable); int st_lsm6dsx_flush_fifo(struct st_lsm6dsx_hw *hw); -int st_lsm6dsx_set_fifo_mode(struct st_lsm6dsx_hw *hw, - enum st_lsm6dsx_fifo_mode fifo_mode); +int st_lsm6dsx_resume_fifo(struct st_lsm6dsx_hw *hw); int st_lsm6dsx_read_fifo(struct st_lsm6dsx_hw *hw); int st_lsm6dsx_read_tagged_fifo(struct st_lsm6dsx_hw *hw); int st_lsm6dsx_check_odr(struct st_lsm6dsx_sensor *sensor, u32 odr, u8 *val); diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c index afd00daeefb2..7de10bd636ea 100644 --- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c @@ -184,8 +184,8 @@ static int st_lsm6dsx_update_decimators(struct st_lsm6dsx_hw *hw) return err; } -int st_lsm6dsx_set_fifo_mode(struct st_lsm6dsx_hw *hw, - enum st_lsm6dsx_fifo_mode fifo_mode) +static int st_lsm6dsx_set_fifo_mode(struct st_lsm6dsx_hw *hw, + enum st_lsm6dsx_fifo_mode fifo_mode) { unsigned int data; @@ -302,6 +302,18 @@ static int st_lsm6dsx_reset_hw_ts(struct st_lsm6dsx_hw *hw) return 0; } +int st_lsm6dsx_resume_fifo(struct st_lsm6dsx_hw *hw) +{ + int err; + + /* reset hw ts counter */ + err = st_lsm6dsx_reset_hw_ts(hw); + if (err < 0) + return err; + + return st_lsm6dsx_set_fifo_mode(hw, ST_LSM6DSX_FIFO_CONT); +} + /* * Set max bulk read to ST_LSM6DSX_MAX_WORD_LEN/ST_LSM6DSX_MAX_TAGGED_WORD_LEN * in order to avoid a kmalloc for each bus access @@ -675,12 +687,7 @@ int st_lsm6dsx_update_fifo(struct st_lsm6dsx_sensor *sensor, bool enable) goto out; if (fifo_mask) { - /* reset hw ts counter */ - err = st_lsm6dsx_reset_hw_ts(hw); - if (err < 0) - goto out; - - err = st_lsm6dsx_set_fifo_mode(hw, ST_LSM6DSX_FIFO_CONT); + err = st_lsm6dsx_resume_fifo(hw); if (err < 0) goto out; } diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c index c8ddeb3f48ff..346c24281d26 100644 --- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c @@ -2457,7 +2457,7 @@ static int __maybe_unused st_lsm6dsx_resume(struct device *dev) } if (hw->fifo_mask) - err = st_lsm6dsx_set_fifo_mode(hw, ST_LSM6DSX_FIFO_CONT); + err = st_lsm6dsx_resume_fifo(hw); return err; }

4 years, 4 months

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Please add 881a3a11c2b858f to 4.19.x

by David Sterba

Hi, please add patch 881a3a11c2b8 ("btrfs: fix return value mixup in btrfs_get_extent") to 4.19 tree. It's a fixup for patch 6bf9e4bd6a27 ("btrfs: inode: Verify inode mode to avoid NULL pointer dereference"). I don't see it queued yet and the patch is tagged for 5.4, this is just a heads up so it's not forgotten. All the related patches: 6bf9e4bd6a27 ("btrfs: inode: Verify inode mode to avoid NULL pointer dereference") 9f7fec0ba891 ("Btrfs: fix selftests failure due to uninitialized i_mode in test inodes") 881a3a11c2b8 ("btrfs: fix return value mixup in btrfs_get_extent") >From 5.4 up it's fine. Thanks.

4 years, 4 months

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FAILED: patch "[PATCH] btrfs: don't show full path of bind mounts in subvol=" failed to apply to 5.4-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 3ef3959b29c4a5bd65526ab310a1a18ae533172a Mon Sep 17 00:00:00 2001 From: Josef Bacik <josef(a)toxicpanda.com> Date: Wed, 22 Jul 2020 11:12:46 -0400 Subject: [PATCH] btrfs: don't show full path of bind mounts in subvol= Chris Murphy reported a problem where rpm ostree will bind mount a bunch of things for whatever voodoo it's doing. But when it does this /proc/mounts shows something like /dev/sda /mnt/test btrfs rw,relatime,subvolid=256,subvol=/foo 0 0 /dev/sda /mnt/test/baz btrfs rw,relatime,subvolid=256,subvol=/foo/bar 0 0 Despite subvolid=256 being subvol=/foo. This is because we're just spitting out the dentry of the mount point, which in the case of bind mounts is the source path for the mountpoint. Instead we should spit out the path to the actual subvol. Fix this by looking up the name for the subvolid we have mounted. With this fix the same test looks like this /dev/sda /mnt/test btrfs rw,relatime,subvolid=256,subvol=/foo 0 0 /dev/sda /mnt/test/baz btrfs rw,relatime,subvolid=256,subvol=/foo 0 0 Reported-by: Chris Murphy <chris(a)colorremedies.com> CC: stable(a)vger.kernel.org # 4.4+ Signed-off-by: Josef Bacik <josef(a)toxicpanda.com> Reviewed-by: David Sterba <dsterba(a)suse.com> Signed-off-by: David Sterba <dsterba(a)suse.com> diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index aa73422b0678..9b4e9c4c4673 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -1386,6 +1386,7 @@ static int btrfs_show_options(struct seq_file *seq, struct dentry *dentry) { struct btrfs_fs_info *info = btrfs_sb(dentry->d_sb); const char *compress_type; + const char *subvol_name; if (btrfs_test_opt(info, DEGRADED)) seq_puts(seq, ",degraded"); @@ -1472,8 +1473,13 @@ static int btrfs_show_options(struct seq_file *seq, struct dentry *dentry) seq_puts(seq, ",ref_verify"); seq_printf(seq, ",subvolid=%llu", BTRFS_I(d_inode(dentry))->root->root_key.objectid); - seq_puts(seq, ",subvol="); - seq_dentry(seq, dentry, " \t\n\\"); + subvol_name = btrfs_get_subvol_name_from_objectid(info, + BTRFS_I(d_inode(dentry))->root->root_key.objectid); + if (!IS_ERR(subvol_name)) { + seq_puts(seq, ",subvol="); + seq_escape(seq, subvol_name, " \t\n\\"); + kfree(subvol_name); + } return 0; }

4 years, 4 months

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FAILED: patch "[PATCH] btrfs: don't show full path of bind mounts in subvol=" failed to apply to 4.19-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.19-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 3ef3959b29c4a5bd65526ab310a1a18ae533172a Mon Sep 17 00:00:00 2001 From: Josef Bacik <josef(a)toxicpanda.com> Date: Wed, 22 Jul 2020 11:12:46 -0400 Subject: [PATCH] btrfs: don't show full path of bind mounts in subvol= Chris Murphy reported a problem where rpm ostree will bind mount a bunch of things for whatever voodoo it's doing. But when it does this /proc/mounts shows something like /dev/sda /mnt/test btrfs rw,relatime,subvolid=256,subvol=/foo 0 0 /dev/sda /mnt/test/baz btrfs rw,relatime,subvolid=256,subvol=/foo/bar 0 0 Despite subvolid=256 being subvol=/foo. This is because we're just spitting out the dentry of the mount point, which in the case of bind mounts is the source path for the mountpoint. Instead we should spit out the path to the actual subvol. Fix this by looking up the name for the subvolid we have mounted. With this fix the same test looks like this /dev/sda /mnt/test btrfs rw,relatime,subvolid=256,subvol=/foo 0 0 /dev/sda /mnt/test/baz btrfs rw,relatime,subvolid=256,subvol=/foo 0 0 Reported-by: Chris Murphy <chris(a)colorremedies.com> CC: stable(a)vger.kernel.org # 4.4+ Signed-off-by: Josef Bacik <josef(a)toxicpanda.com> Reviewed-by: David Sterba <dsterba(a)suse.com> Signed-off-by: David Sterba <dsterba(a)suse.com> diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index aa73422b0678..9b4e9c4c4673 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -1386,6 +1386,7 @@ static int btrfs_show_options(struct seq_file *seq, struct dentry *dentry) { struct btrfs_fs_info *info = btrfs_sb(dentry->d_sb); const char *compress_type; + const char *subvol_name; if (btrfs_test_opt(info, DEGRADED)) seq_puts(seq, ",degraded"); @@ -1472,8 +1473,13 @@ static int btrfs_show_options(struct seq_file *seq, struct dentry *dentry) seq_puts(seq, ",ref_verify"); seq_printf(seq, ",subvolid=%llu", BTRFS_I(d_inode(dentry))->root->root_key.objectid); - seq_puts(seq, ",subvol="); - seq_dentry(seq, dentry, " \t\n\\"); + subvol_name = btrfs_get_subvol_name_from_objectid(info, + BTRFS_I(d_inode(dentry))->root->root_key.objectid); + if (!IS_ERR(subvol_name)) { + seq_puts(seq, ",subvol="); + seq_escape(seq, subvol_name, " \t\n\\"); + kfree(subvol_name); + } return 0; }

4 years, 4 months

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FAILED: patch "[PATCH] btrfs: inode: fix NULL pointer dereference if inode doesn't" failed to apply to 4.14-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.14-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 1e6e238c3002ea3611465ce5f32777ddd6a40126 Mon Sep 17 00:00:00 2001 From: Qu Wenruo <wqu(a)suse.com> Date: Tue, 28 Jul 2020 16:39:26 +0800 Subject: [PATCH] btrfs: inode: fix NULL pointer dereference if inode doesn't need compression [BUG] There is a bug report of NULL pointer dereference caused in compress_file_extent(): Oops: Kernel access of bad area, sig: 11 [#1] LE PAGE_SIZE=64K MMU=Hash SMP NR_CPUS=2048 NUMA pSeries Workqueue: btrfs-delalloc btrfs_delalloc_helper [btrfs] NIP [c008000006dd4d34] compress_file_range.constprop.41+0x75c/0x8a0 [btrfs] LR [c008000006dd4d1c] compress_file_range.constprop.41+0x744/0x8a0 [btrfs] Call Trace: [c000000c69093b00] [c008000006dd4d1c] compress_file_range.constprop.41+0x744/0x8a0 [btrfs] (unreliable) [c000000c69093bd0] [c008000006dd4ebc] async_cow_start+0x44/0xa0 [btrfs] [c000000c69093c10] [c008000006e14824] normal_work_helper+0xdc/0x598 [btrfs] [c000000c69093c80] [c0000000001608c0] process_one_work+0x2c0/0x5b0 [c000000c69093d10] [c000000000160c38] worker_thread+0x88/0x660 [c000000c69093db0] [c00000000016b55c] kthread+0x1ac/0x1c0 [c000000c69093e20] [c00000000000b660] ret_from_kernel_thread+0x5c/0x7c ---[ end trace f16954aa20d822f6 ]--- [CAUSE] For the following execution route of compress_file_range(), it's possible to hit NULL pointer dereference: compress_file_extent() |- pages = NULL; |- start = async_chunk->start = 0; |- end = async_chunk = 4095; |- nr_pages = 1; |- inode_need_compress() == false; <<< Possible, see later explanation | Now, we have nr_pages = 1, pages = NULL |- cont: |- ret = cow_file_range_inline(); |- if (ret <= 0) { |- for (i = 0; i < nr_pages; i++) { |- WARN_ON(pages[i]->mapping); <<< Crash To enter above call execution branch, we need the following race: Thread 1 (chattr) | Thread 2 (writeback) --------------------------+------------------------------ | btrfs_run_delalloc_range | |- inode_need_compress = true | |- cow_file_range_async() btrfs_ioctl_set_flag() | |- binode_flags |= | BTRFS_INODE_NOCOMPRESS | | compress_file_range() | |- inode_need_compress = false | |- nr_page = 1 while pages = NULL | | Then hit the crash [FIX] This patch will fix it by checking @pages before doing accessing it. This patch is only designed as a hot fix and easy to backport. More elegant fix may make btrfs only check inode_need_compress() once to avoid such race, but that would be another story. Reported-by: Luciano Chavez <chavez(a)us.ibm.com> Fixes: 4d3a800ebb12 ("btrfs: merge nr_pages input and output parameter in compress_pages") CC: stable(a)vger.kernel.org # 4.14.x: cecc8d9038d16: btrfs: Move free_pages_out label in inline extent handling branch in compress_file_range CC: stable(a)vger.kernel.org # 4.14+ Signed-off-by: Qu Wenruo <wqu(a)suse.com> Signed-off-by: David Sterba <dsterba(a)suse.com> diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 611b3412fbfd..9988d754e465 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -653,12 +653,18 @@ static noinline int compress_file_range(struct async_chunk *async_chunk) page_error_op | PAGE_END_WRITEBACK); - for (i = 0; i < nr_pages; i++) { - WARN_ON(pages[i]->mapping); - put_page(pages[i]); + /* + * Ensure we only free the compressed pages if we have + * them allocated, as we can still reach here with + * inode_need_compress() == false. + */ + if (pages) { + for (i = 0; i < nr_pages; i++) { + WARN_ON(pages[i]->mapping); + put_page(pages[i]); + } + kfree(pages); } - kfree(pages); - return 0; } }

4 years, 4 months

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FAILED: patch "[PATCH] btrfs: inode: fix NULL pointer dereference if inode doesn't" failed to apply to 4.19-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.19-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 1e6e238c3002ea3611465ce5f32777ddd6a40126 Mon Sep 17 00:00:00 2001 From: Qu Wenruo <wqu(a)suse.com> Date: Tue, 28 Jul 2020 16:39:26 +0800 Subject: [PATCH] btrfs: inode: fix NULL pointer dereference if inode doesn't need compression [BUG] There is a bug report of NULL pointer dereference caused in compress_file_extent(): Oops: Kernel access of bad area, sig: 11 [#1] LE PAGE_SIZE=64K MMU=Hash SMP NR_CPUS=2048 NUMA pSeries Workqueue: btrfs-delalloc btrfs_delalloc_helper [btrfs] NIP [c008000006dd4d34] compress_file_range.constprop.41+0x75c/0x8a0 [btrfs] LR [c008000006dd4d1c] compress_file_range.constprop.41+0x744/0x8a0 [btrfs] Call Trace: [c000000c69093b00] [c008000006dd4d1c] compress_file_range.constprop.41+0x744/0x8a0 [btrfs] (unreliable) [c000000c69093bd0] [c008000006dd4ebc] async_cow_start+0x44/0xa0 [btrfs] [c000000c69093c10] [c008000006e14824] normal_work_helper+0xdc/0x598 [btrfs] [c000000c69093c80] [c0000000001608c0] process_one_work+0x2c0/0x5b0 [c000000c69093d10] [c000000000160c38] worker_thread+0x88/0x660 [c000000c69093db0] [c00000000016b55c] kthread+0x1ac/0x1c0 [c000000c69093e20] [c00000000000b660] ret_from_kernel_thread+0x5c/0x7c ---[ end trace f16954aa20d822f6 ]--- [CAUSE] For the following execution route of compress_file_range(), it's possible to hit NULL pointer dereference: compress_file_extent() |- pages = NULL; |- start = async_chunk->start = 0; |- end = async_chunk = 4095; |- nr_pages = 1; |- inode_need_compress() == false; <<< Possible, see later explanation | Now, we have nr_pages = 1, pages = NULL |- cont: |- ret = cow_file_range_inline(); |- if (ret <= 0) { |- for (i = 0; i < nr_pages; i++) { |- WARN_ON(pages[i]->mapping); <<< Crash To enter above call execution branch, we need the following race: Thread 1 (chattr) | Thread 2 (writeback) --------------------------+------------------------------ | btrfs_run_delalloc_range | |- inode_need_compress = true | |- cow_file_range_async() btrfs_ioctl_set_flag() | |- binode_flags |= | BTRFS_INODE_NOCOMPRESS | | compress_file_range() | |- inode_need_compress = false | |- nr_page = 1 while pages = NULL | | Then hit the crash [FIX] This patch will fix it by checking @pages before doing accessing it. This patch is only designed as a hot fix and easy to backport. More elegant fix may make btrfs only check inode_need_compress() once to avoid such race, but that would be another story. Reported-by: Luciano Chavez <chavez(a)us.ibm.com> Fixes: 4d3a800ebb12 ("btrfs: merge nr_pages input and output parameter in compress_pages") CC: stable(a)vger.kernel.org # 4.14.x: cecc8d9038d16: btrfs: Move free_pages_out label in inline extent handling branch in compress_file_range CC: stable(a)vger.kernel.org # 4.14+ Signed-off-by: Qu Wenruo <wqu(a)suse.com> Signed-off-by: David Sterba <dsterba(a)suse.com> diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 611b3412fbfd..9988d754e465 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -653,12 +653,18 @@ static noinline int compress_file_range(struct async_chunk *async_chunk) page_error_op | PAGE_END_WRITEBACK); - for (i = 0; i < nr_pages; i++) { - WARN_ON(pages[i]->mapping); - put_page(pages[i]); + /* + * Ensure we only free the compressed pages if we have + * them allocated, as we can still reach here with + * inode_need_compress() == false. + */ + if (pages) { + for (i = 0; i < nr_pages; i++) { + WARN_ON(pages[i]->mapping); + put_page(pages[i]); + } + kfree(pages); } - kfree(pages); - return 0; } }

4 years, 4 months

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FAILED: patch "[PATCH] btrfs: Move free_pages_out label in inline extent handling" failed to apply to 4.14-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.14-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From cecc8d9038d164eda61fbcd72520975a554ea63e Mon Sep 17 00:00:00 2001 From: Nikolay Borisov <nborisov(a)suse.com> Date: Wed, 17 Jul 2019 14:41:45 +0300 Subject: [PATCH] btrfs: Move free_pages_out label in inline extent handling branch in compress_file_range This label is only executed if compress_file_range fails to create an inline extent. So move its code in the semantically related inline extent handling branch. No functional changes. Signed-off-by: Nikolay Borisov <nborisov(a)suse.com> Reviewed-by: David Sterba <dsterba(a)suse.com> Signed-off-by: David Sterba <dsterba(a)suse.com> diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index db814f555b26..385127ab0841 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -622,7 +622,14 @@ static noinline int compress_file_range(struct async_chunk *async_chunk) PAGE_SET_WRITEBACK | page_error_op | PAGE_END_WRITEBACK); - goto free_pages_out; + + for (i = 0; i < nr_pages; i++) { + WARN_ON(pages[i]->mapping); + put_page(pages[i]); + } + kfree(pages); + + return 0; } } @@ -700,15 +707,6 @@ static noinline int compress_file_range(struct async_chunk *async_chunk) compressed_extents++; return compressed_extents; - -free_pages_out: - for (i = 0; i < nr_pages; i++) { - WARN_ON(pages[i]->mapping); - put_page(pages[i]); - } - kfree(pages); - - return 0; } static void free_async_extent_pages(struct async_extent *async_extent)

4 years, 4 months

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FAILED: patch "[PATCH] btrfs: Move free_pages_out label in inline extent handling" failed to apply to 4.19-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.19-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From cecc8d9038d164eda61fbcd72520975a554ea63e Mon Sep 17 00:00:00 2001 From: Nikolay Borisov <nborisov(a)suse.com> Date: Wed, 17 Jul 2019 14:41:45 +0300 Subject: [PATCH] btrfs: Move free_pages_out label in inline extent handling branch in compress_file_range This label is only executed if compress_file_range fails to create an inline extent. So move its code in the semantically related inline extent handling branch. No functional changes. Signed-off-by: Nikolay Borisov <nborisov(a)suse.com> Reviewed-by: David Sterba <dsterba(a)suse.com> Signed-off-by: David Sterba <dsterba(a)suse.com> diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index db814f555b26..385127ab0841 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -622,7 +622,14 @@ static noinline int compress_file_range(struct async_chunk *async_chunk) PAGE_SET_WRITEBACK | page_error_op | PAGE_END_WRITEBACK); - goto free_pages_out; + + for (i = 0; i < nr_pages; i++) { + WARN_ON(pages[i]->mapping); + put_page(pages[i]); + } + kfree(pages); + + return 0; } } @@ -700,15 +707,6 @@ static noinline int compress_file_range(struct async_chunk *async_chunk) compressed_extents++; return compressed_extents; - -free_pages_out: - for (i = 0; i < nr_pages; i++) { - WARN_ON(pages[i]->mapping); - put_page(pages[i]); - } - kfree(pages); - - return 0; } static void free_async_extent_pages(struct async_extent *async_extent)

4 years, 4 months

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FAILED: patch "[PATCH] btrfs: don't show full path of bind mounts in subvol=" failed to apply to 4.14-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.14-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 3ef3959b29c4a5bd65526ab310a1a18ae533172a Mon Sep 17 00:00:00 2001 From: Josef Bacik <josef(a)toxicpanda.com> Date: Wed, 22 Jul 2020 11:12:46 -0400 Subject: [PATCH] btrfs: don't show full path of bind mounts in subvol= Chris Murphy reported a problem where rpm ostree will bind mount a bunch of things for whatever voodoo it's doing. But when it does this /proc/mounts shows something like /dev/sda /mnt/test btrfs rw,relatime,subvolid=256,subvol=/foo 0 0 /dev/sda /mnt/test/baz btrfs rw,relatime,subvolid=256,subvol=/foo/bar 0 0 Despite subvolid=256 being subvol=/foo. This is because we're just spitting out the dentry of the mount point, which in the case of bind mounts is the source path for the mountpoint. Instead we should spit out the path to the actual subvol. Fix this by looking up the name for the subvolid we have mounted. With this fix the same test looks like this /dev/sda /mnt/test btrfs rw,relatime,subvolid=256,subvol=/foo 0 0 /dev/sda /mnt/test/baz btrfs rw,relatime,subvolid=256,subvol=/foo 0 0 Reported-by: Chris Murphy <chris(a)colorremedies.com> CC: stable(a)vger.kernel.org # 4.4+ Signed-off-by: Josef Bacik <josef(a)toxicpanda.com> Reviewed-by: David Sterba <dsterba(a)suse.com> Signed-off-by: David Sterba <dsterba(a)suse.com> diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index aa73422b0678..9b4e9c4c4673 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -1386,6 +1386,7 @@ static int btrfs_show_options(struct seq_file *seq, struct dentry *dentry) { struct btrfs_fs_info *info = btrfs_sb(dentry->d_sb); const char *compress_type; + const char *subvol_name; if (btrfs_test_opt(info, DEGRADED)) seq_puts(seq, ",degraded"); @@ -1472,8 +1473,13 @@ static int btrfs_show_options(struct seq_file *seq, struct dentry *dentry) seq_puts(seq, ",ref_verify"); seq_printf(seq, ",subvolid=%llu", BTRFS_I(d_inode(dentry))->root->root_key.objectid); - seq_puts(seq, ",subvol="); - seq_dentry(seq, dentry, " \t\n\\"); + subvol_name = btrfs_get_subvol_name_from_objectid(info, + BTRFS_I(d_inode(dentry))->root->root_key.objectid); + if (!IS_ERR(subvol_name)) { + seq_puts(seq, ",subvol="); + seq_escape(seq, subvol_name, " \t\n\\"); + kfree(subvol_name); + } return 0; }

4 years, 4 months

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FAILED: patch "[PATCH] btrfs: don't show full path of bind mounts in subvol=" failed to apply to 4.9-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.9-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 3ef3959b29c4a5bd65526ab310a1a18ae533172a Mon Sep 17 00:00:00 2001 From: Josef Bacik <josef(a)toxicpanda.com> Date: Wed, 22 Jul 2020 11:12:46 -0400 Subject: [PATCH] btrfs: don't show full path of bind mounts in subvol= Chris Murphy reported a problem where rpm ostree will bind mount a bunch of things for whatever voodoo it's doing. But when it does this /proc/mounts shows something like /dev/sda /mnt/test btrfs rw,relatime,subvolid=256,subvol=/foo 0 0 /dev/sda /mnt/test/baz btrfs rw,relatime,subvolid=256,subvol=/foo/bar 0 0 Despite subvolid=256 being subvol=/foo. This is because we're just spitting out the dentry of the mount point, which in the case of bind mounts is the source path for the mountpoint. Instead we should spit out the path to the actual subvol. Fix this by looking up the name for the subvolid we have mounted. With this fix the same test looks like this /dev/sda /mnt/test btrfs rw,relatime,subvolid=256,subvol=/foo 0 0 /dev/sda /mnt/test/baz btrfs rw,relatime,subvolid=256,subvol=/foo 0 0 Reported-by: Chris Murphy <chris(a)colorremedies.com> CC: stable(a)vger.kernel.org # 4.4+ Signed-off-by: Josef Bacik <josef(a)toxicpanda.com> Reviewed-by: David Sterba <dsterba(a)suse.com> Signed-off-by: David Sterba <dsterba(a)suse.com> diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index aa73422b0678..9b4e9c4c4673 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -1386,6 +1386,7 @@ static int btrfs_show_options(struct seq_file *seq, struct dentry *dentry) { struct btrfs_fs_info *info = btrfs_sb(dentry->d_sb); const char *compress_type; + const char *subvol_name; if (btrfs_test_opt(info, DEGRADED)) seq_puts(seq, ",degraded"); @@ -1472,8 +1473,13 @@ static int btrfs_show_options(struct seq_file *seq, struct dentry *dentry) seq_puts(seq, ",ref_verify"); seq_printf(seq, ",subvolid=%llu", BTRFS_I(d_inode(dentry))->root->root_key.objectid); - seq_puts(seq, ",subvol="); - seq_dentry(seq, dentry, " \t\n\\"); + subvol_name = btrfs_get_subvol_name_from_objectid(info, + BTRFS_I(d_inode(dentry))->root->root_key.objectid); + if (!IS_ERR(subvol_name)) { + seq_puts(seq, ",subvol="); + seq_escape(seq, subvol_name, " \t\n\\"); + kfree(subvol_name); + } return 0; }

4 years, 4 months

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Linux-stable-mirror August 2020