August 2020 - Linux-stable-mirror

[PATCH AUTOSEL 4.4 1/6] jbd2: make sure jh have b_transaction set in refile/unfile_buffer

by Sasha Levin

From: Lukas Czerner <lczerner(a)redhat.com> [ Upstream commit 24dc9864914eb5813173cfa53313fcd02e4aea7d ] Callers of __jbd2_journal_unfile_buffer() and __jbd2_journal_refile_buffer() assume that the b_transaction is set. In fact if it's not, we can end up with journal_head refcounting errors leading to crash much later that might be very hard to track down. Add asserts to make sure that is the case. We also make sure that b_next_transaction is NULL in __jbd2_journal_unfile_buffer() since the callers expect that as well and we should not get into that stage in this state anyway, leading to problems later on if we do. Tested with fstests. Signed-off-by: Lukas Czerner <lczerner(a)redhat.com> Reviewed-by: Jan Kara <jack(a)suse.cz> Link: https://lore.kernel.org/r/20200617092549.6712-1-lczerner@redhat.com Signed-off-by: Theodore Ts'o <tytso(a)mit.edu> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- fs/jbd2/transaction.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c index 3233e5ac9774f..622610934c9ad 100644 --- a/fs/jbd2/transaction.c +++ b/fs/jbd2/transaction.c @@ -1906,6 +1906,9 @@ static void __jbd2_journal_temp_unlink_buffer(struct journal_head *jh) */ static void __jbd2_journal_unfile_buffer(struct journal_head *jh) { + J_ASSERT_JH(jh, jh->b_transaction != NULL); + J_ASSERT_JH(jh, jh->b_next_transaction == NULL); + __jbd2_journal_temp_unlink_buffer(jh); jh->b_transaction = NULL; jbd2_journal_put_journal_head(jh); @@ -2453,6 +2456,13 @@ void __jbd2_journal_refile_buffer(struct journal_head *jh) was_dirty = test_clear_buffer_jbddirty(bh); __jbd2_journal_temp_unlink_buffer(jh); + + /* + * b_transaction must be set, otherwise the new b_transaction won't + * be holding jh reference + */ + J_ASSERT_JH(jh, jh->b_transaction != NULL); + /* * We set b_transaction here because b_next_transaction will inherit * our jh reference and thus __jbd2_journal_file_buffer() must not -- 2.25.1

5 years

1
5
0 0

[PATCH AUTOSEL 4.9 1/8] jbd2: make sure jh have b_transaction set in refile/unfile_buffer

by Sasha Levin

From: Lukas Czerner <lczerner(a)redhat.com> [ Upstream commit 24dc9864914eb5813173cfa53313fcd02e4aea7d ] Callers of __jbd2_journal_unfile_buffer() and __jbd2_journal_refile_buffer() assume that the b_transaction is set. In fact if it's not, we can end up with journal_head refcounting errors leading to crash much later that might be very hard to track down. Add asserts to make sure that is the case. We also make sure that b_next_transaction is NULL in __jbd2_journal_unfile_buffer() since the callers expect that as well and we should not get into that stage in this state anyway, leading to problems later on if we do. Tested with fstests. Signed-off-by: Lukas Czerner <lczerner(a)redhat.com> Reviewed-by: Jan Kara <jack(a)suse.cz> Link: https://lore.kernel.org/r/20200617092549.6712-1-lczerner@redhat.com Signed-off-by: Theodore Ts'o <tytso(a)mit.edu> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- fs/jbd2/transaction.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c index 8de458d64134a..1478512ecab3e 100644 --- a/fs/jbd2/transaction.c +++ b/fs/jbd2/transaction.c @@ -1896,6 +1896,9 @@ static void __jbd2_journal_temp_unlink_buffer(struct journal_head *jh) */ static void __jbd2_journal_unfile_buffer(struct journal_head *jh) { + J_ASSERT_JH(jh, jh->b_transaction != NULL); + J_ASSERT_JH(jh, jh->b_next_transaction == NULL); + __jbd2_journal_temp_unlink_buffer(jh); jh->b_transaction = NULL; jbd2_journal_put_journal_head(jh); @@ -2443,6 +2446,13 @@ void __jbd2_journal_refile_buffer(struct journal_head *jh) was_dirty = test_clear_buffer_jbddirty(bh); __jbd2_journal_temp_unlink_buffer(jh); + + /* + * b_transaction must be set, otherwise the new b_transaction won't + * be holding jh reference + */ + J_ASSERT_JH(jh, jh->b_transaction != NULL); + /* * We set b_transaction here because b_next_transaction will inherit * our jh reference and thus __jbd2_journal_file_buffer() must not -- 2.25.1

5 years

1
7
0 0

[PATCH AUTOSEL 4.14 01/11] jbd2: make sure jh have b_transaction set in refile/unfile_buffer

by Sasha Levin

From: Lukas Czerner <lczerner(a)redhat.com> [ Upstream commit 24dc9864914eb5813173cfa53313fcd02e4aea7d ] Callers of __jbd2_journal_unfile_buffer() and __jbd2_journal_refile_buffer() assume that the b_transaction is set. In fact if it's not, we can end up with journal_head refcounting errors leading to crash much later that might be very hard to track down. Add asserts to make sure that is the case. We also make sure that b_next_transaction is NULL in __jbd2_journal_unfile_buffer() since the callers expect that as well and we should not get into that stage in this state anyway, leading to problems later on if we do. Tested with fstests. Signed-off-by: Lukas Czerner <lczerner(a)redhat.com> Reviewed-by: Jan Kara <jack(a)suse.cz> Link: https://lore.kernel.org/r/20200617092549.6712-1-lczerner@redhat.com Signed-off-by: Theodore Ts'o <tytso(a)mit.edu> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- fs/jbd2/transaction.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c index a355ca418e788..b4bde0ae10948 100644 --- a/fs/jbd2/transaction.c +++ b/fs/jbd2/transaction.c @@ -1914,6 +1914,9 @@ static void __jbd2_journal_temp_unlink_buffer(struct journal_head *jh) */ static void __jbd2_journal_unfile_buffer(struct journal_head *jh) { + J_ASSERT_JH(jh, jh->b_transaction != NULL); + J_ASSERT_JH(jh, jh->b_next_transaction == NULL); + __jbd2_journal_temp_unlink_buffer(jh); jh->b_transaction = NULL; jbd2_journal_put_journal_head(jh); @@ -2461,6 +2464,13 @@ void __jbd2_journal_refile_buffer(struct journal_head *jh) was_dirty = test_clear_buffer_jbddirty(bh); __jbd2_journal_temp_unlink_buffer(jh); + + /* + * b_transaction must be set, otherwise the new b_transaction won't + * be holding jh reference + */ + J_ASSERT_JH(jh, jh->b_transaction != NULL); + /* * We set b_transaction here because b_next_transaction will inherit * our jh reference and thus __jbd2_journal_file_buffer() must not -- 2.25.1

5 years

1
10
0 0

[PATCH AUTOSEL 4.19 01/21] jbd2: make sure jh have b_transaction set in refile/unfile_buffer

by Sasha Levin

From: Lukas Czerner <lczerner(a)redhat.com> [ Upstream commit 24dc9864914eb5813173cfa53313fcd02e4aea7d ] Callers of __jbd2_journal_unfile_buffer() and __jbd2_journal_refile_buffer() assume that the b_transaction is set. In fact if it's not, we can end up with journal_head refcounting errors leading to crash much later that might be very hard to track down. Add asserts to make sure that is the case. We also make sure that b_next_transaction is NULL in __jbd2_journal_unfile_buffer() since the callers expect that as well and we should not get into that stage in this state anyway, leading to problems later on if we do. Tested with fstests. Signed-off-by: Lukas Czerner <lczerner(a)redhat.com> Reviewed-by: Jan Kara <jack(a)suse.cz> Link: https://lore.kernel.org/r/20200617092549.6712-1-lczerner@redhat.com Signed-off-by: Theodore Ts'o <tytso(a)mit.edu> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- fs/jbd2/transaction.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c index 43693b6797105..5a0de78a5d71a 100644 --- a/fs/jbd2/transaction.c +++ b/fs/jbd2/transaction.c @@ -1915,6 +1915,9 @@ static void __jbd2_journal_temp_unlink_buffer(struct journal_head *jh) */ static void __jbd2_journal_unfile_buffer(struct journal_head *jh) { + J_ASSERT_JH(jh, jh->b_transaction != NULL); + J_ASSERT_JH(jh, jh->b_next_transaction == NULL); + __jbd2_journal_temp_unlink_buffer(jh); jh->b_transaction = NULL; jbd2_journal_put_journal_head(jh); @@ -2462,6 +2465,13 @@ void __jbd2_journal_refile_buffer(struct journal_head *jh) was_dirty = test_clear_buffer_jbddirty(bh); __jbd2_journal_temp_unlink_buffer(jh); + + /* + * b_transaction must be set, otherwise the new b_transaction won't + * be holding jh reference + */ + J_ASSERT_JH(jh, jh->b_transaction != NULL); + /* * We set b_transaction here because b_next_transaction will inherit * our jh reference and thus __jbd2_journal_file_buffer() must not -- 2.25.1

5 years

1
20
0 0

[PATCH] Revert "drm/amd/display: Improve DisplayPort monitor interop"

by Alex Deucher

This reverts commit 1adb2ff1f6b170cdbc3925a359c8f39d2215dc20. This breaks display wake up in stable kernels (5.7.x and 5.8.x). Note that there is no upstream equivalent to this revert. This patch was targeted for stable by Sasha's stable patch process. Presumably there are some other changes necessary for this patch to work properly on stable kernels. Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1266 Signed-off-by: Alex Deucher <alexander.deucher(a)amd.com> Cc: stable(a)vger.kernel.org # 5.7.x, 5.8.x Cc: Sasha Levin <sashal(a)kernel.org> --- drivers/gpu/drm/amd/display/dc/core/dc_link.c | 4 +--- drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 16 ++++++---------- .../amd/display/dc/dce110/dce110_hw_sequencer.c | 11 +---------- 3 files changed, 8 insertions(+), 23 deletions(-) diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c b/drivers/gpu/drm/amd/display/dc/core/dc_link.c index 841cc051b7d0..48ab51533d5d 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c @@ -3298,11 +3298,9 @@ void core_link_disable_stream(struct pipe_ctx *pipe_ctx) write_i2c_redriver_setting(pipe_ctx, false); } } - - disable_link(pipe_ctx->stream->link, pipe_ctx->stream->signal); - dc->hwss.disable_stream(pipe_ctx); + disable_link(pipe_ctx->stream->link, pipe_ctx->stream->signal); if (pipe_ctx->stream->timing.flags.DSC) { if (dc_is_dp_signal(pipe_ctx->stream->signal)) dp_set_dsc_enable(pipe_ctx, false); diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c index 6124af571bff..91cd884d6f25 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c @@ -1102,10 +1102,6 @@ static inline enum link_training_result perform_link_training_int( dpcd_pattern.v1_4.TRAINING_PATTERN_SET = DPCD_TRAINING_PATTERN_VIDEOIDLE; dpcd_set_training_pattern(link, dpcd_pattern); - /* delay 5ms after notifying sink of idle pattern before switching output */ - if (link->connector_signal != SIGNAL_TYPE_EDP) - msleep(5); - /* 4. mainlink output idle pattern*/ dp_set_hw_test_pattern(link, DP_TEST_PATTERN_VIDEO_MODE, NULL, 0); @@ -1555,12 +1551,6 @@ bool perform_link_training_with_retries( struct dc_link *link = stream->link; enum dp_panel_mode panel_mode = dp_get_panel_mode(link); - /* We need to do this before the link training to ensure the idle pattern in SST - * mode will be sent right after the link training - */ - link->link_enc->funcs->connect_dig_be_to_fe(link->link_enc, - pipe_ctx->stream_res.stream_enc->id, true); - for (j = 0; j < attempts; ++j) { dp_enable_link_phy( @@ -1577,6 +1567,12 @@ bool perform_link_training_with_retries( dp_set_panel_mode(link, panel_mode); + /* We need to do this before the link training to ensure the idle pattern in SST + * mode will be sent right after the link training + */ + link->link_enc->funcs->connect_dig_be_to_fe(link->link_enc, + pipe_ctx->stream_res.stream_enc->id, true); + if (link->aux_access_disabled) { dc_link_dp_perform_link_training_skip_aux(link, link_setting); return true; diff --git a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c index 2af1d74d16ad..b77e9dc16086 100644 --- a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c +++ b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c @@ -1069,17 +1069,8 @@ void dce110_blank_stream(struct pipe_ctx *pipe_ctx) link->dc->hwss.set_abm_immediate_disable(pipe_ctx); } - if (dc_is_dp_signal(pipe_ctx->stream->signal)) { + if (dc_is_dp_signal(pipe_ctx->stream->signal)) pipe_ctx->stream_res.stream_enc->funcs->dp_blank(pipe_ctx->stream_res.stream_enc); - - /* - * After output is idle pattern some sinks need time to recognize the stream - * has changed or they enter protection state and hang. - */ - if (!dc_is_embedded_signal(pipe_ctx->stream->signal)) - msleep(60); - } - } -- 2.25.4

5 years

2
1
0 0

[PATCH stable-4.4.y backport] KVM: arm/arm64: Don't reschedule in unmap_stage2_range()

by Will Deacon

Upstream commits fdfe7cbd5880 ("KVM: Pass MMU notifier range flags to kvm_unmap_hva_range()") and b5331379bc62 ("KVM: arm64: Only reschedule if MMU_NOTIFIER_RANGE_BLOCKABLE is not set") fix a "sleeping from invalid context" BUG caused by unmap_stage2_range() attempting to reschedule when called on the OOM path. Unfortunately, these patches rely on the MMU notifier callback being passed knowledge about whether or not blocking is permitted, which was introduced in 4.19. Rather than backport this considerable amount of infrastructure just for KVM on arm, instead just remove the conditional reschedule. Cc: <stable(a)vger.kernel.org> # v4.4 only Cc: Marc Zyngier <maz(a)kernel.org> Cc: Suzuki K Poulose <suzuki.poulose(a)arm.com> Cc: James Morse <james.morse(a)arm.com> Signed-off-by: Will Deacon <will(a)kernel.org> --- arch/arm/kvm/mmu.c | 8 -------- 1 file changed, 8 deletions(-) diff --git a/arch/arm/kvm/mmu.c b/arch/arm/kvm/mmu.c index e0267532bd4e..edd392fdc14b 100644 --- a/arch/arm/kvm/mmu.c +++ b/arch/arm/kvm/mmu.c @@ -300,14 +300,6 @@ static void unmap_range(struct kvm *kvm, pgd_t *pgdp, next = kvm_pgd_addr_end(addr, end); if (!pgd_none(*pgd)) unmap_puds(kvm, pgd, addr, next); - /* - * If we are dealing with a large range in - * stage2 table, release the kvm->mmu_lock - * to prevent starvation and lockup detector - * warnings. - */ - if (kvm && (next != end)) - cond_resched_lock(&kvm->mmu_lock); } while (pgd++, addr = next, addr != end); } -- 2.28.0.297.g1956fa8f8d-goog

5 years

3
2
0 0

[PATCH 4.9 00/39] 4.9.234-rc1 review

by Greg Kroah-Hartman

This is the start of the stable review cycle for the 4.9.234 release. There are 39 patches in this series, all will be posted as a response to this one. If anyone has any issues with these being applied, please let me know. Responses should be made by Wed, 26 Aug 2020 08:23:34 +0000. Anything received after that time might be too late. The whole patch series can be found in one patch at: https://www.kernel.org/pub/linux/kernel/v4.x/stable-review/patch-4.9.234-rc… or in the git tree and branch at: git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.9.y and the diffstat can be found below. thanks, greg k-h ------------- Pseudo-Shortlog of commits: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> Linux 4.9.234-rc1 Juergen Gross <jgross(a)suse.com> xen: don't reschedule in preemption off sections Peter Xu <peterx(a)redhat.com> mm/hugetlb: fix calculation of adjust_range_if_pmd_sharing_possible Al Viro <viro(a)zeniv.linux.org.uk> do_epoll_ctl(): clean the failure exits up a bit Marc Zyngier <maz(a)kernel.org> epoll: Keep a reference on files added to the check list Michael Ellerman <mpe(a)ellerman.id.au> powerpc: Allow 4224 bytes of stack expansion for the signal frame Vasant Hegde <hegdevasant(a)linux.vnet.ibm.com> powerpc/pseries: Do not initiate shutdown when system is running on UPS Tom Rix <trix(a)redhat.com> net: dsa: b53: check for timeout Dinghao Liu <dinghao.liu(a)zju.edu.cn> ASoC: intel: Fix memleak in sst_media_open Fugang Duan <fugang.duan(a)nxp.com> net: fec: correct the error path for regulator disable in probe Przemyslaw Patynowski <przemyslawx.patynowski(a)intel.com> i40e: Set RX_ONLY mode for unicast promiscuous on VLAN Eric Sandeen <sandeen(a)redhat.com> ext4: fix potential negative array index in do_split() Luc Van Oostenryck <luc.vanoostenryck(a)gmail.com> alpha: fix annotation of io{read,write}{16,32}be() Eiichi Tsukata <devel(a)etsukata.com> xfs: Fix UBSAN null-ptr-deref in xfs_sysfs_init Mao Wenan <wenan.mao(a)linux.alibaba.com> virtio_ring: Avoid loop when vq is broken in virtqueue_poll Javed Hasan <jhasan(a)marvell.com> scsi: libfc: Free skb in fc_disc_gpn_id_resp() for valid cases Zhe Li <lizhe67(a)huawei.com> jffs2: fix UAF problem Darrick J. Wong <darrick.wong(a)oracle.com> xfs: fix inode quota reservation checks Greg Ungerer <gerg(a)linux-m68k.org> m68knommu: fix overwriting of bits in ColdFire V3 cache control Xiongfeng Wang <wangxiongfeng2(a)huawei.com> Input: psmouse - add a newline when printing 'proto' by sysfs Evgeny Novikov <novikov(a)ispras.ru> media: vpss: clean up resources in init Chuhong Yuan <hslester96(a)gmail.com> media: budget-core: Improve exception handling in budget_register() Stanley Chu <stanley.chu(a)mediatek.com> scsi: ufs: Add DELAY_BEFORE_LPM quirk for Micron devices Jan Kara <jack(a)suse.cz> ext4: fix checking of directory entry validity for inline directories Eric Biggers <ebiggers(a)google.com> ext4: clean up ext4_match() and callers zhangyi (F) <yi.zhang(a)huawei.com> jbd2: add the missing unlock_buffer() in the error path of jbd2_write_superblock() Charan Teja Reddy <charante(a)codeaurora.org> mm, page_alloc: fix core hung in free_pcppages_bulk() Doug Berger <opendmb(a)gmail.com> mm: include CMA pages in lowmem_reserve at boot Wei Yongjun <weiyongjun1(a)huawei.com> kernel/relay.c: fix memleak on destroy relay channel Jann Horn <jannh(a)google.com> romfs: fix uninitialized memory leak in romfs_dev_read() Josef Bacik <josef(a)toxicpanda.com> btrfs: don't show full path of bind mounts in subvol= Marcos Paulo de Souza <mpdesouza(a)suse.com> btrfs: export helpers for subvolume name/id resolution Hugh Dickins <hughd(a)google.com> khugepaged: adjust VM_BUG_ON_MM() in __khugepaged_enter() Hugh Dickins <hughd(a)google.com> khugepaged: khugepaged_test_exit() check mmget_still_valid() Kevin Hao <haokexin(a)gmail.com> tracing/hwlat: Honor the tracing_cpumask Steven Rostedt (VMware) <rostedt(a)goodmis.org> tracing: Clean up the hwlat binding code Masami Hiramatsu <mhiramat(a)kernel.org> perf probe: Fix memory leakage when the probe point is not found Liu Ying <victor.liu(a)nxp.com> drm/imx: imx-ldb: Disable both channels for split mode in enc->disable() Jan Beulich <JBeulich(a)suse.com> x86/asm: Add instruction suffixes to bitops Uros Bizjak <ubizjak(a)gmail.com> x86/asm: Remove unnecessary \n\t in front of CC_SET() from asm templates ------------- Diffstat: Makefile | 4 +- arch/alpha/include/asm/io.h | 8 +- arch/m68k/include/asm/m53xxacr.h | 6 +- arch/powerpc/mm/fault.c | 7 +- arch/powerpc/platforms/pseries/ras.c | 1 - arch/x86/include/asm/archrandom.h | 8 +- arch/x86/include/asm/bitops.h | 29 ++++--- arch/x86/include/asm/percpu.h | 2 +- drivers/gpu/drm/imx/imx-ldb.c | 7 +- drivers/input/mouse/psmouse-base.c | 2 +- drivers/media/pci/ttpci/budget-core.c | 11 ++- drivers/media/platform/davinci/vpss.c | 20 ++++- drivers/net/dsa/b53/b53_common.c | 2 + drivers/net/ethernet/freescale/fec_main.c | 4 +- drivers/net/ethernet/intel/i40e/i40e_adminq_cmd.h | 2 +- drivers/net/ethernet/intel/i40e/i40e_common.c | 35 ++++++-- drivers/scsi/libfc/fc_disc.c | 12 ++- drivers/scsi/ufs/ufs_quirks.h | 1 + drivers/scsi/ufs/ufshcd.c | 2 + drivers/virtio/virtio_ring.c | 3 + drivers/xen/preempt.c | 2 +- fs/btrfs/ctree.h | 2 + fs/btrfs/export.c | 8 +- fs/btrfs/export.h | 5 ++ fs/btrfs/super.c | 18 +++-- fs/eventpoll.c | 19 +++-- fs/ext4/namei.c | 99 +++++++++-------------- fs/jbd2/journal.c | 4 +- fs/jffs2/dir.c | 6 +- fs/romfs/storage.c | 4 +- fs/xfs/xfs_sysfs.h | 6 +- fs/xfs/xfs_trans_dquot.c | 2 +- kernel/relay.c | 1 + kernel/trace/trace_hwlat.c | 37 ++++----- mm/hugetlb.c | 24 +++--- mm/khugepaged.c | 7 +- mm/page_alloc.c | 7 +- sound/soc/intel/atom/sst-mfld-platform-pcm.c | 5 +- tools/perf/util/probe-finder.c | 2 +- 39 files changed, 241 insertions(+), 183 deletions(-)

5 years

3
42
0 0

[PATCH v3] btrfs: block-group: Fix free-space bitmap threshould

by Marcos Paulo de Souza

From: Marcos Paulo de Souza <mpdesouza(a)suse.com> [BUG] After commit 9afc66498a0b ("btrfs: block-group: refactor how we read one block group item"), cache->length is being assigned after calling btrfs_create_block_group_cache. This causes a problem since set_free_space_tree_thresholds is calculate the free-space threshould to decide is the free-space tree should convert from extents to bitmaps. The current code calls set_free_space_tree_thresholds with cache->length being 0, which then makes cache->bitmap_high_thresh being zero. This implies the system will always use bitmap instead of extents, which is not desired if the block group is not fragmented. This behavior can be seen by a test that expects to repair systems with FREE_SPACE_EXTENT and FREE_SPACE_BITMAP, but the current code only created FREE_SPACE_BITMAP. [FIX] Call set_free_space_tree_thresholds after setting cache->length. There is now a WARN_ON in set_free_space_tree_thresholds to help preventing the same mistake to happen again in the future. Link: https://github.com/kdave/btrfs-progs/issues/251 Fixes: 9afc66498a0b ("btrfs: block-group: refactor how we read one block group item") CC: stable(a)vger.kernel.org # 5.8+ Reviewed-by: Qu Wenruo <wqu(a)suse.com> Reviewed-by: Filipe Manana <fdmanana(a)suse.com> Signed-off-by: Marcos Paulo de Souza <mpdesouza(a)suse.com> --- Changes from v2: * Add a WARN_ON and changed the warn message (Filipe) * Add a Reviewed-by tag from Filipe Changes from v1: * Add warn message (Qu) * Add a Reviewed-by tag from Qu fs/btrfs/block-group.c | 4 +++- fs/btrfs/free-space-tree.c | 4 ++++ 2 files changed, 7 insertions(+), 1 deletion(-) diff --git a/fs/btrfs/block-group.c b/fs/btrfs/block-group.c index 44fdfa2eeb2e..01e8ba1da1d3 100644 --- a/fs/btrfs/block-group.c +++ b/fs/btrfs/block-group.c @@ -1798,7 +1798,6 @@ static struct btrfs_block_group *btrfs_create_block_group_cache( cache->fs_info = fs_info; cache->full_stripe_len = btrfs_full_stripe_len(fs_info, start); - set_free_space_tree_thresholds(cache); cache->discard_index = BTRFS_DISCARD_INDEX_UNUSED; @@ -1908,6 +1907,8 @@ static int read_one_block_group(struct btrfs_fs_info *info, read_block_group_item(cache, path, key); + set_free_space_tree_thresholds(cache); + if (need_clear) { /* * When we mount with old space cache, we need to @@ -2128,6 +2129,7 @@ int btrfs_make_block_group(struct btrfs_trans_handle *trans, u64 bytes_used, return -ENOMEM; cache->length = size; + set_free_space_tree_thresholds(cache); cache->used = bytes_used; cache->flags = type; cache->last_byte_to_unpin = (u64)-1; diff --git a/fs/btrfs/free-space-tree.c b/fs/btrfs/free-space-tree.c index 8b1f5c8897b7..f072c106b82b 100644 --- a/fs/btrfs/free-space-tree.c +++ b/fs/btrfs/free-space-tree.c @@ -22,6 +22,10 @@ void set_free_space_tree_thresholds(struct btrfs_block_group *cache) size_t bitmap_size; u64 num_bitmaps, total_bitmap_size; + if (WARN_ON(cache->length == 0)) + btrfs_warn(cache->fs_info, "block group %llu length is zero", + cache->start); + /* * We convert to bitmaps when the disk space required for using extents * exceeds that required for using bitmaps. -- 2.28.0

5 years

2
1
0 0

[PATCH stable-5.8.y backport 1/2] KVM: Pass MMU notifier range flags to kvm_unmap_hva_range()

by Will Deacon

commit fdfe7cbd58806522e799e2a50a15aee7f2cbb7b6 upstream. The 'flags' field of 'struct mmu_notifier_range' is used to indicate whether invalidate_range_{start,end}() are permitted to block. In the case of kvm_mmu_notifier_invalidate_range_start(), this field is not forwarded on to the architecture-specific implementation of kvm_unmap_hva_range() and therefore the backend cannot sensibly decide whether or not to block. Add an extra 'flags' parameter to kvm_unmap_hva_range() so that architectures are aware as to whether or not they are permitted to block. Cc: <stable(a)vger.kernel.org> # v5.8 only Cc: Marc Zyngier <maz(a)kernel.org> Cc: Suzuki K Poulose <suzuki.poulose(a)arm.com> Cc: James Morse <james.morse(a)arm.com> Signed-off-by: Will Deacon <will(a)kernel.org> Message-Id: <20200811102725.7121-2-will(a)kernel.org> Signed-off-by: Paolo Bonzini <pbonzini(a)redhat.com> Signed-off-by: Will Deacon <will(a)kernel.org> --- arch/arm64/include/asm/kvm_host.h | 2 +- arch/arm64/kvm/mmu.c | 2 +- arch/mips/include/asm/kvm_host.h | 2 +- arch/mips/kvm/mmu.c | 3 ++- arch/powerpc/include/asm/kvm_host.h | 3 ++- arch/powerpc/kvm/book3s.c | 3 ++- arch/powerpc/kvm/e500_mmu_host.c | 3 ++- arch/x86/include/asm/kvm_host.h | 3 ++- arch/x86/kvm/mmu/mmu.c | 3 ++- virt/kvm/kvm_main.c | 3 ++- 10 files changed, 17 insertions(+), 10 deletions(-) diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index e21d4a01372f..759d62343e1d 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -443,7 +443,7 @@ int __kvm_arm_vcpu_set_events(struct kvm_vcpu *vcpu, #define KVM_ARCH_WANT_MMU_NOTIFIER int kvm_unmap_hva_range(struct kvm *kvm, - unsigned long start, unsigned long end); + unsigned long start, unsigned long end, unsigned flags); int kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte); int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end); int kvm_test_age_hva(struct kvm *kvm, unsigned long hva); diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c index 31058e6e7c2a..5f6b35c33618 100644 --- a/arch/arm64/kvm/mmu.c +++ b/arch/arm64/kvm/mmu.c @@ -2203,7 +2203,7 @@ static int kvm_unmap_hva_handler(struct kvm *kvm, gpa_t gpa, u64 size, void *dat } int kvm_unmap_hva_range(struct kvm *kvm, - unsigned long start, unsigned long end) + unsigned long start, unsigned long end, unsigned flags) { if (!kvm->arch.pgd) return 0; diff --git a/arch/mips/include/asm/kvm_host.h b/arch/mips/include/asm/kvm_host.h index 363e7a89d173..ef1d25d49ec8 100644 --- a/arch/mips/include/asm/kvm_host.h +++ b/arch/mips/include/asm/kvm_host.h @@ -981,7 +981,7 @@ enum kvm_mips_fault_result kvm_trap_emul_gva_fault(struct kvm_vcpu *vcpu, #define KVM_ARCH_WANT_MMU_NOTIFIER int kvm_unmap_hva_range(struct kvm *kvm, - unsigned long start, unsigned long end); + unsigned long start, unsigned long end, unsigned flags); int kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte); int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end); int kvm_test_age_hva(struct kvm *kvm, unsigned long hva); diff --git a/arch/mips/kvm/mmu.c b/arch/mips/kvm/mmu.c index 49bd160f4d85..0783ac9b3240 100644 --- a/arch/mips/kvm/mmu.c +++ b/arch/mips/kvm/mmu.c @@ -518,7 +518,8 @@ static int kvm_unmap_hva_handler(struct kvm *kvm, gfn_t gfn, gfn_t gfn_end, return 1; } -int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end) +int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end, + unsigned flags) { handle_hva_to_gpa(kvm, start, end, &kvm_unmap_hva_handler, NULL); diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h index 7e2d061d0445..bccf0ba2da2e 100644 --- a/arch/powerpc/include/asm/kvm_host.h +++ b/arch/powerpc/include/asm/kvm_host.h @@ -58,7 +58,8 @@ #define KVM_ARCH_WANT_MMU_NOTIFIER extern int kvm_unmap_hva_range(struct kvm *kvm, - unsigned long start, unsigned long end); + unsigned long start, unsigned long end, + unsigned flags); extern int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end); extern int kvm_test_age_hva(struct kvm *kvm, unsigned long hva); extern int kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte); diff --git a/arch/powerpc/kvm/book3s.c b/arch/powerpc/kvm/book3s.c index 41fedec69ac3..49db50d1db04 100644 --- a/arch/powerpc/kvm/book3s.c +++ b/arch/powerpc/kvm/book3s.c @@ -834,7 +834,8 @@ void kvmppc_core_commit_memory_region(struct kvm *kvm, kvm->arch.kvm_ops->commit_memory_region(kvm, mem, old, new, change); } -int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end) +int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end, + unsigned flags) { return kvm->arch.kvm_ops->unmap_hva_range(kvm, start, end); } diff --git a/arch/powerpc/kvm/e500_mmu_host.c b/arch/powerpc/kvm/e500_mmu_host.c index d6c1069e9954..ed0c9c43d0cf 100644 --- a/arch/powerpc/kvm/e500_mmu_host.c +++ b/arch/powerpc/kvm/e500_mmu_host.c @@ -734,7 +734,8 @@ static int kvm_unmap_hva(struct kvm *kvm, unsigned long hva) return 0; } -int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end) +int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end, + unsigned flags) { /* kvm_unmap_hva flushes everything anyways */ kvm_unmap_hva(kvm, start); diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index be5363b21540..c6908a3d551e 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -1641,7 +1641,8 @@ asmlinkage void kvm_spurious_fault(void); _ASM_EXTABLE(666b, 667b) #define KVM_ARCH_WANT_MMU_NOTIFIER -int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end); +int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end, + unsigned flags); int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end); int kvm_test_age_hva(struct kvm *kvm, unsigned long hva); int kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte); diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c index 6d6a0ae7800c..9516a958e780 100644 --- a/arch/x86/kvm/mmu/mmu.c +++ b/arch/x86/kvm/mmu/mmu.c @@ -1971,7 +1971,8 @@ static int kvm_handle_hva(struct kvm *kvm, unsigned long hva, return kvm_handle_hva_range(kvm, hva, hva + 1, data, handler); } -int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end) +int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end, + unsigned flags) { return kvm_handle_hva_range(kvm, start, end, 0, kvm_unmap_rmapp); } diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 0a68c9d3d3ab..9e925675a886 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -427,7 +427,8 @@ static int kvm_mmu_notifier_invalidate_range_start(struct mmu_notifier *mn, * count is also read inside the mmu_lock critical section. */ kvm->mmu_notifier_count++; - need_tlb_flush = kvm_unmap_hva_range(kvm, range->start, range->end); + need_tlb_flush = kvm_unmap_hva_range(kvm, range->start, range->end, + range->flags); need_tlb_flush |= kvm->tlbs_dirty; /* we've to flush the tlb before the pages can be freed */ if (need_tlb_flush) -- 2.28.0.297.g1956fa8f8d-goog

5 years

2
2
0 0

stable-rc/linux-5.4.y baseline: 158 runs, 3 regressions (v5.4.60-108-g302fb8173830)

by kernelci.org bot

stable-rc/linux-5.4.y baseline: 158 runs, 3 regressions (v5.4.60-108-g302fb8173830) Regressions Summary ------------------- platform | arch | lab | compiler | defconfig | results ----------------------+------+--------------+----------+-------------------+-------- at91-sama5d4_xplained | arm | lab-baylibre | gcc-8 | sama5_defconfig | 0/1 bcm2837-rpi-3-b | arm | lab-baylibre | gcc-8 | bcm2835_defconfig | 2/4 Details: https://kernelci.org/test/job/stable-rc/branch/linux-5.4.y/kernel/v5.4.60-1… Test: baseline Tree: stable-rc Branch: linux-5.4.y Describe: v5.4.60-108-g302fb8173830 URL: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git SHA: 302fb8173830c9e1542d947f2d3250df1583efc6 Test Regressions ---------------- platform | arch | lab | compiler | defconfig | results ----------------------+------+--------------+----------+-------------------+-------- at91-sama5d4_xplained | arm | lab-baylibre | gcc-8 | sama5_defconfig | 0/1 Details: https://kernelci.org/test/plan/id/5f43c1a5b776b2c89b9fb434 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: sama5_defconfig Compiler: gcc-8 (arm-linux-gnueabihf-gcc (Debian 8.3.0-2) 8.3.0) Plain log: https://storage.kernelci.org//stable-rc/linux-5.4.y/v5.4.60-108-g302fb81738… HTML log: https://storage.kernelci.org//stable-rc/linux-5.4.y/v5.4.60-108-g302fb81738… Rootfs: http://storage.kernelci.org/images/rootfs/buildroot/kci-2020.05/armel/basel… * baseline.login: https://kernelci.org/test/case/id/5f43c1a5b776b2c89b9fb435 failing since 134 days (last pass: v5.4.30-54-g6f04e8ca5355, first fail: v5.4.30-81-gf163418797b9) platform | arch | lab | compiler | defconfig | results ----------------------+------+--------------+----------+-------------------+-------- bcm2837-rpi-3-b | arm | lab-baylibre | gcc-8 | bcm2835_defconfig | 2/4 Details: https://kernelci.org/test/plan/id/5f438eb38adcbfa8d39fb43d Results: 2 PASS, 2 FAIL, 0 SKIP Full config: bcm2835_defconfig Compiler: gcc-8 (arm-linux-gnueabihf-gcc (Debian 8.3.0-2) 8.3.0) Plain log: https://storage.kernelci.org//stable-rc/linux-5.4.y/v5.4.60-108-g302fb81738… HTML log: https://storage.kernelci.org//stable-rc/linux-5.4.y/v5.4.60-108-g302fb81738… Rootfs: http://storage.kernelci.org/images/rootfs/buildroot/kci-2020.05/armel/basel… * baseline.dmesg.alert: https://kernelci.org/test/case/id/5f438eb38adcbfa8d39fb442 new failure (last pass: v5.4.60-39-g6ba0cb3c0b4a) 4 lines 2020-08-24 09:55:51.993000 kern :alert : pgd = 712e727a 2020-08-24 09:55:51.994000 kern :alert : [0000001c] *pgd=2ae7a835, *pte=00000000, *ppte=00000000 * baseline.dmesg.emerg: https://kernelci.org/test/case/id/5f438eb38adcbfa8d39fb443 new failure (last pass: v5.4.60-39-g6ba0cb3c0b4a) 49 lines 2020-08-24 09:55:51.997000 kern :emerg : Process udevd (pid: 89, stack limit = 0x67aa4a31) 2020-08-24 09:55:51.998000 kern :emerg : Stack: (0xeae63a60 to 0xeae64000) 2020-08-24 09:55:52.035000 kern :emerg : 3a60: 00000001 c0d586fc c0d0e880 c057d1c4 eae6a000 eae52a30 c0d0e400 00000000 2020-08-24 09:55:52.036000 kern :emerg : 3a80: 00000000 00000001 eae63ac4 eae63a98 c0148bcc c0147abc 00000000 eae52a30 2020-08-24 09:55:52.037000 kern :emerg : 3aa0: eae6a000 c0d0e400 00000000 00000009 00000001 c014dd88 eae63aec eae63ac8 2020-08-24 09:55:52.038000 kern :emerg : 3ac0: c0148dd8 c0148b64 eae52a00 00000009 c0d0e400 00000000 80000093 00000001 2020-08-24 09:55:52.039000 kern :emerg : 3ae0: eae63b0c eae63af0 c0142500 c0148d48 eae52a00 eae52a00 c0d04248 00000000 2020-08-24 09:55:52.079000 kern :emerg : 3b00: eae63b24 eae63b10 c01428f0 c01424d0 00000001 eae52a00 eae63b5c eae63b28 2020-08-24 09:55:52.080000 kern :emerg : 3b20: c0142b98 c01428b0 eae63b64 eae63b38 c043a208 02813c19 eaeb3f50 ead56a00 2020-08-24 09:55:52.081000 kern :emerg : 3b40: 00000001 ead56a0c 00000000 00000001 eae63b6c eae63b60 c0142cc8 c0142ab0 ... (38 line(s) more)

5 years

1
0
0 0

2025

2024

2023

2022

2021

2020

2019

2018

2017

Linux-stable-mirror August 2020