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Patch "mbcache: initialize entry->e_referenced in mb_cache_entry_create()" has been added to the 4.15-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled mbcache: initialize entry->e_referenced in mb_cache_entry_create() to the 4.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: mbcache-initialize-entry-e_referenced-in-mb_cache_entry_create.patch and it can be found in the queue-4.15 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From 3876bbe27d04b848750d5310a37d6b76b593f648 Mon Sep 17 00:00:00 2001 From: Alexander Potapenko <glider(a)google.com> Date: Sun, 7 Jan 2018 16:22:35 -0500 Subject: mbcache: initialize entry->e_referenced in mb_cache_entry_create() From: Alexander Potapenko <glider(a)google.com> commit 3876bbe27d04b848750d5310a37d6b76b593f648 upstream. KMSAN reported use of uninitialized |entry->e_referenced| in a condition in mb_cache_shrink(): ================================================================== BUG: KMSAN: use of uninitialized memory in mb_cache_shrink+0x3b4/0xc50 fs/mbcache.c:287 CPU: 2 PID: 816 Comm: kswapd1 Not tainted 4.11.0-rc5+ #2877 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:16 [inline] dump_stack+0x172/0x1c0 lib/dump_stack.c:52 kmsan_report+0x12a/0x180 mm/kmsan/kmsan.c:927 __msan_warning_32+0x61/0xb0 mm/kmsan/kmsan_instr.c:469 mb_cache_shrink+0x3b4/0xc50 fs/mbcache.c:287 mb_cache_scan+0x67/0x80 fs/mbcache.c:321 do_shrink_slab mm/vmscan.c:397 [inline] shrink_slab+0xc3d/0x12d0 mm/vmscan.c:500 shrink_node+0x208f/0x2fd0 mm/vmscan.c:2603 kswapd_shrink_node mm/vmscan.c:3172 [inline] balance_pgdat mm/vmscan.c:3289 [inline] kswapd+0x160f/0x2850 mm/vmscan.c:3478 kthread+0x46c/0x5f0 kernel/kthread.c:230 ret_from_fork+0x29/0x40 arch/x86/entry/entry_64.S:430 chained origin: save_stack_trace+0x37/0x40 arch/x86/kernel/stacktrace.c:59 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:302 [inline] kmsan_save_stack mm/kmsan/kmsan.c:317 [inline] kmsan_internal_chain_origin+0x12a/0x1f0 mm/kmsan/kmsan.c:547 __msan_store_shadow_origin_1+0xac/0x110 mm/kmsan/kmsan_instr.c:257 mb_cache_entry_create+0x3b3/0xc60 fs/mbcache.c:95 ext4_xattr_cache_insert fs/ext4/xattr.c:1647 [inline] ext4_xattr_block_set+0x4c82/0x5530 fs/ext4/xattr.c:1022 ext4_xattr_set_handle+0x1332/0x20a0 fs/ext4/xattr.c:1252 ext4_xattr_set+0x4d2/0x680 fs/ext4/xattr.c:1306 ext4_xattr_trusted_set+0x8d/0xa0 fs/ext4/xattr_trusted.c:36 __vfs_setxattr+0x703/0x790 fs/xattr.c:149 __vfs_setxattr_noperm+0x27a/0x6f0 fs/xattr.c:180 vfs_setxattr fs/xattr.c:223 [inline] setxattr+0x6ae/0x790 fs/xattr.c:449 path_setxattr+0x1eb/0x380 fs/xattr.c:468 SYSC_lsetxattr+0x8d/0xb0 fs/xattr.c:490 SyS_lsetxattr+0x77/0xa0 fs/xattr.c:486 entry_SYSCALL_64_fastpath+0x13/0x94 origin: save_stack_trace+0x37/0x40 arch/x86/kernel/stacktrace.c:59 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:302 [inline] kmsan_internal_poison_shadow+0xb1/0x1a0 mm/kmsan/kmsan.c:198 kmsan_kmalloc+0x7f/0xe0 mm/kmsan/kmsan.c:337 kmem_cache_alloc+0x1c2/0x1e0 mm/slub.c:2766 mb_cache_entry_create+0x283/0xc60 fs/mbcache.c:86 ext4_xattr_cache_insert fs/ext4/xattr.c:1647 [inline] ext4_xattr_block_set+0x4c82/0x5530 fs/ext4/xattr.c:1022 ext4_xattr_set_handle+0x1332/0x20a0 fs/ext4/xattr.c:1252 ext4_xattr_set+0x4d2/0x680 fs/ext4/xattr.c:1306 ext4_xattr_trusted_set+0x8d/0xa0 fs/ext4/xattr_trusted.c:36 __vfs_setxattr+0x703/0x790 fs/xattr.c:149 __vfs_setxattr_noperm+0x27a/0x6f0 fs/xattr.c:180 vfs_setxattr fs/xattr.c:223 [inline] setxattr+0x6ae/0x790 fs/xattr.c:449 path_setxattr+0x1eb/0x380 fs/xattr.c:468 SYSC_lsetxattr+0x8d/0xb0 fs/xattr.c:490 SyS_lsetxattr+0x77/0xa0 fs/xattr.c:486 entry_SYSCALL_64_fastpath+0x13/0x94 ================================================================== Signed-off-by: Alexander Potapenko <glider(a)google.com> Signed-off-by: Eric Biggers <ebiggers(a)google.com> Cc: stable(a)vger.kernel.org # v4.6 Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- fs/mbcache.c | 1 + 1 file changed, 1 insertion(+) --- a/fs/mbcache.c +++ b/fs/mbcache.c @@ -94,6 +94,7 @@ int mb_cache_entry_create(struct mb_cach entry->e_key = key; entry->e_value = value; entry->e_reusable = reusable; + entry->e_referenced = 0; head = mb_cache_entry_head(cache, key); hlist_bl_lock(head); hlist_bl_for_each_entry(dup, dup_node, head, e_hash_list) { Patches currently in stable-queue which might be from glider(a)google.com are queue-4.15/mbcache-initialize-entry-e_referenced-in-mb_cache_entry_create.patch

7 years, 4 months

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Patch "jbd2: fix sphinx kernel-doc build warnings" has been added to the 4.15-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled jbd2: fix sphinx kernel-doc build warnings to the 4.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: jbd2-fix-sphinx-kernel-doc-build-warnings.patch and it can be found in the queue-4.15 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From f69120ce6c024aa634a8fc25787205e42f0ccbe6 Mon Sep 17 00:00:00 2001 From: "Tobin C. Harding" <me(a)tobin.cc> Date: Wed, 10 Jan 2018 00:27:29 -0500 Subject: jbd2: fix sphinx kernel-doc build warnings From: Tobin C. Harding <me(a)tobin.cc> commit f69120ce6c024aa634a8fc25787205e42f0ccbe6 upstream. Sphinx emits various (26) warnings when building make target 'htmldocs'. Currently struct definitions contain duplicate documentation, some as kernel-docs and some as standard c89 comments. We can reduce duplication while cleaning up the kernel docs. Move all kernel-docs to right above each struct member. Use the set of all existing comments (kernel-doc and c89). Add documentation for missing struct members and function arguments. Signed-off-by: Tobin C. Harding <me(a)tobin.cc> Signed-off-by: Theodore Ts'o <tytso(a)mit.edu> Cc: stable(a)vger.kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- fs/jbd2/transaction.c | 5 include/linux/jbd2.h | 431 +++++++++++++++++++++++++++++++------------------- 2 files changed, 272 insertions(+), 164 deletions(-) --- a/fs/jbd2/transaction.c +++ b/fs/jbd2/transaction.c @@ -495,8 +495,10 @@ void jbd2_journal_free_reserved(handle_t EXPORT_SYMBOL(jbd2_journal_free_reserved); /** - * int jbd2_journal_start_reserved(handle_t *handle) - start reserved handle + * int jbd2_journal_start_reserved() - start reserved handle * @handle: handle to start + * @type: for handle statistics + * @line_no: for handle statistics * * Start handle that has been previously reserved with jbd2_journal_reserve(). * This attaches @handle to the running transaction (or creates one if there's @@ -626,6 +628,7 @@ error_out: * int jbd2_journal_restart() - restart a handle . * @handle: handle to restart * @nblocks: nr credits requested + * @gfp_mask: memory allocation flags (for start_this_handle) * * Restart a handle for a multi-transaction filesystem * operation. --- a/include/linux/jbd2.h +++ b/include/linux/jbd2.h @@ -418,26 +418,41 @@ static inline void jbd_unlock_bh_journal #define JI_WAIT_DATA (1 << __JI_WAIT_DATA) /** - * struct jbd_inode is the structure linking inodes in ordered mode - * present in a transaction so that we can sync them during commit. + * struct jbd_inode - The jbd_inode type is the structure linking inodes in + * ordered mode present in a transaction so that we can sync them during commit. */ struct jbd2_inode { - /* Which transaction does this inode belong to? Either the running - * transaction or the committing one. [j_list_lock] */ + /** + * @i_transaction: + * + * Which transaction does this inode belong to? Either the running + * transaction or the committing one. [j_list_lock] + */ transaction_t *i_transaction; - /* Pointer to the running transaction modifying inode's data in case - * there is already a committing transaction touching it. [j_list_lock] */ + /** + * @i_next_transaction: + * + * Pointer to the running transaction modifying inode's data in case + * there is already a committing transaction touching it. [j_list_lock] + */ transaction_t *i_next_transaction; - /* List of inodes in the i_transaction [j_list_lock] */ + /** + * @i_list: List of inodes in the i_transaction [j_list_lock] + */ struct list_head i_list; - /* VFS inode this inode belongs to [constant during the lifetime - * of the structure] */ + /** + * @i_vfs_inode: + * + * VFS inode this inode belongs to [constant for lifetime of structure] + */ struct inode *i_vfs_inode; - /* Flags of inode [j_list_lock] */ + /** + * @i_flags: Flags of inode [j_list_lock] + */ unsigned long i_flags; }; @@ -447,12 +462,20 @@ struct jbd2_revoke_table_s; * struct handle_s - The handle_s type is the concrete type associated with * handle_t. * @h_transaction: Which compound transaction is this update a part of? + * @h_journal: Which journal handle belongs to - used iff h_reserved set. + * @h_rsv_handle: Handle reserved for finishing the logical operation. * @h_buffer_credits: Number of remaining buffers we are allowed to dirty. - * @h_ref: Reference count on this handle - * @h_err: Field for caller's use to track errors through large fs operations - * @h_sync: flag for sync-on-close - * @h_jdata: flag to force data journaling - * @h_aborted: flag indicating fatal error on handle + * @h_ref: Reference count on this handle. + * @h_err: Field for caller's use to track errors through large fs operations. + * @h_sync: Flag for sync-on-close. + * @h_jdata: Flag to force data journaling. + * @h_reserved: Flag for handle for reserved credits. + * @h_aborted: Flag indicating fatal error on handle. + * @h_type: For handle statistics. + * @h_line_no: For handle statistics. + * @h_start_jiffies: Handle Start time. + * @h_requested_credits: Holds @h_buffer_credits after handle is started. + * @saved_alloc_context: Saved context while transaction is open. **/ /* Docbook can't yet cope with the bit fields, but will leave the documentation @@ -462,32 +485,23 @@ struct jbd2_revoke_table_s; struct jbd2_journal_handle { union { - /* Which compound transaction is this update a part of? */ transaction_t *h_transaction; /* Which journal handle belongs to - used iff h_reserved set */ journal_t *h_journal; }; - /* Handle reserved for finishing the logical operation */ handle_t *h_rsv_handle; - - /* Number of remaining buffers we are allowed to dirty: */ int h_buffer_credits; - - /* Reference count on this handle */ int h_ref; - - /* Field for caller's use to track errors through large fs */ - /* operations */ int h_err; /* Flags [no locking] */ - unsigned int h_sync: 1; /* sync-on-close */ - unsigned int h_jdata: 1; /* force data journaling */ - unsigned int h_reserved: 1; /* handle with reserved credits */ - unsigned int h_aborted: 1; /* fatal error on handle */ - unsigned int h_type: 8; /* for handle statistics */ - unsigned int h_line_no: 16; /* for handle statistics */ + unsigned int h_sync: 1; + unsigned int h_jdata: 1; + unsigned int h_reserved: 1; + unsigned int h_aborted: 1; + unsigned int h_type: 8; + unsigned int h_line_no: 16; unsigned long h_start_jiffies; unsigned int h_requested_credits; @@ -729,228 +743,253 @@ jbd2_time_diff(unsigned long start, unsi /** * struct journal_s - The journal_s type is the concrete type associated with * journal_t. - * @j_flags: General journaling state flags - * @j_errno: Is there an outstanding uncleared error on the journal (from a - * prior abort)? - * @j_sb_buffer: First part of superblock buffer - * @j_superblock: Second part of superblock buffer - * @j_format_version: Version of the superblock format - * @j_state_lock: Protect the various scalars in the journal - * @j_barrier_count: Number of processes waiting to create a barrier lock - * @j_barrier: The barrier lock itself - * @j_running_transaction: The current running transaction.. - * @j_committing_transaction: the transaction we are pushing to disk - * @j_checkpoint_transactions: a linked circular list of all transactions - * waiting for checkpointing - * @j_wait_transaction_locked: Wait queue for waiting for a locked transaction - * to start committing, or for a barrier lock to be released - * @j_wait_done_commit: Wait queue for waiting for commit to complete - * @j_wait_commit: Wait queue to trigger commit - * @j_wait_updates: Wait queue to wait for updates to complete - * @j_wait_reserved: Wait queue to wait for reserved buffer credits to drop - * @j_checkpoint_mutex: Mutex for locking against concurrent checkpoints - * @j_head: Journal head - identifies the first unused block in the journal - * @j_tail: Journal tail - identifies the oldest still-used block in the - * journal. - * @j_free: Journal free - how many free blocks are there in the journal? - * @j_first: The block number of the first usable block - * @j_last: The block number one beyond the last usable block - * @j_dev: Device where we store the journal - * @j_blocksize: blocksize for the location where we store the journal. - * @j_blk_offset: starting block offset for into the device where we store the - * journal - * @j_fs_dev: Device which holds the client fs. For internal journal this will - * be equal to j_dev - * @j_reserved_credits: Number of buffers reserved from the running transaction - * @j_maxlen: Total maximum capacity of the journal region on disk. - * @j_list_lock: Protects the buffer lists and internal buffer state. - * @j_inode: Optional inode where we store the journal. If present, all journal - * block numbers are mapped into this inode via bmap(). - * @j_tail_sequence: Sequence number of the oldest transaction in the log - * @j_transaction_sequence: Sequence number of the next transaction to grant - * @j_commit_sequence: Sequence number of the most recently committed - * transaction - * @j_commit_request: Sequence number of the most recent transaction wanting - * commit - * @j_uuid: Uuid of client object. - * @j_task: Pointer to the current commit thread for this journal - * @j_max_transaction_buffers: Maximum number of metadata buffers to allow in a - * single compound commit transaction - * @j_commit_interval: What is the maximum transaction lifetime before we begin - * a commit? - * @j_commit_timer: The timer used to wakeup the commit thread - * @j_revoke_lock: Protect the revoke table - * @j_revoke: The revoke table - maintains the list of revoked blocks in the - * current transaction. - * @j_revoke_table: alternate revoke tables for j_revoke - * @j_wbuf: array of buffer_heads for jbd2_journal_commit_transaction - * @j_wbufsize: maximum number of buffer_heads allowed in j_wbuf, the - * number that will fit in j_blocksize - * @j_last_sync_writer: most recent pid which did a synchronous write - * @j_history_lock: Protect the transactions statistics history - * @j_proc_entry: procfs entry for the jbd statistics directory - * @j_stats: Overall statistics - * @j_private: An opaque pointer to fs-private information. - * @j_trans_commit_map: Lockdep entity to track transaction commit dependencies */ - struct journal_s { - /* General journaling state flags [j_state_lock] */ + /** + * @j_flags: General journaling state flags [j_state_lock] + */ unsigned long j_flags; - /* + /** + * @j_errno: + * * Is there an outstanding uncleared error on the journal (from a prior * abort)? [j_state_lock] */ int j_errno; - /* The superblock buffer */ + /** + * @j_sb_buffer: The first part of the superblock buffer. + */ struct buffer_head *j_sb_buffer; + + /** + * @j_superblock: The second part of the superblock buffer. + */ journal_superblock_t *j_superblock; - /* Version of the superblock format */ + /** + * @j_format_version: Version of the superblock format. + */ int j_format_version; - /* - * Protect the various scalars in the journal + /** + * @j_state_lock: Protect the various scalars in the journal. */ rwlock_t j_state_lock; - /* + /** + * @j_barrier_count: + * * Number of processes waiting to create a barrier lock [j_state_lock] */ int j_barrier_count; - /* The barrier lock itself */ + /** + * @j_barrier: The barrier lock itself. + */ struct mutex j_barrier; - /* + /** + * @j_running_transaction: + * * Transactions: The current running transaction... * [j_state_lock] [caller holding open handle] */ transaction_t *j_running_transaction; - /* + /** + * @j_committing_transaction: + * * the transaction we are pushing to disk * [j_state_lock] [caller holding open handle] */ transaction_t *j_committing_transaction; - /* + /** + * @j_checkpoint_transactions: + * * ... and a linked circular list of all transactions waiting for * checkpointing. [j_list_lock] */ transaction_t *j_checkpoint_transactions; - /* + /** + * @j_wait_transaction_locked: + * * Wait queue for waiting for a locked transaction to start committing, - * or for a barrier lock to be released + * or for a barrier lock to be released. */ wait_queue_head_t j_wait_transaction_locked; - /* Wait queue for waiting for commit to complete */ + /** + * @j_wait_done_commit: Wait queue for waiting for commit to complete. + */ wait_queue_head_t j_wait_done_commit; - /* Wait queue to trigger commit */ + /** + * @j_wait_commit: Wait queue to trigger commit. + */ wait_queue_head_t j_wait_commit; - /* Wait queue to wait for updates to complete */ + /** + * @j_wait_updates: Wait queue to wait for updates to complete. + */ wait_queue_head_t j_wait_updates; - /* Wait queue to wait for reserved buffer credits to drop */ + /** + * @j_wait_reserved: + * + * Wait queue to wait for reserved buffer credits to drop. + */ wait_queue_head_t j_wait_reserved; - /* Semaphore for locking against concurrent checkpoints */ + /** + * @j_checkpoint_mutex: + * + * Semaphore for locking against concurrent checkpoints. + */ struct mutex j_checkpoint_mutex; - /* + /** + * @j_chkpt_bhs: + * * List of buffer heads used by the checkpoint routine. This * was moved from jbd2_log_do_checkpoint() to reduce stack * usage. Access to this array is controlled by the - * j_checkpoint_mutex. [j_checkpoint_mutex] + * @j_checkpoint_mutex. [j_checkpoint_mutex] */ struct buffer_head *j_chkpt_bhs[JBD2_NR_BATCH]; - - /* + + /** + * @j_head: + * * Journal head: identifies the first unused block in the journal. * [j_state_lock] */ unsigned long j_head; - /* + /** + * @j_tail: + * * Journal tail: identifies the oldest still-used block in the journal. * [j_state_lock] */ unsigned long j_tail; - /* + /** + * @j_free: + * * Journal free: how many free blocks are there in the journal? * [j_state_lock] */ unsigned long j_free; - /* - * Journal start and end: the block numbers of the first usable block - * and one beyond the last usable block in the journal. [j_state_lock] + /** + * @j_first: + * + * The block number of the first usable block in the journal + * [j_state_lock]. */ unsigned long j_first; + + /** + * @j_last: + * + * The block number one beyond the last usable block in the journal + * [j_state_lock]. + */ unsigned long j_last; - /* - * Device, blocksize and starting block offset for the location where we - * store the journal. + /** + * @j_dev: Device where we store the journal. */ struct block_device *j_dev; + + /** + * @j_blocksize: Block size for the location where we store the journal. + */ int j_blocksize; + + /** + * @j_blk_offset: + * + * Starting block offset into the device where we store the journal. + */ unsigned long long j_blk_offset; + + /** + * @j_devname: Journal device name. + */ char j_devname[BDEVNAME_SIZE+24]; - /* + /** + * @j_fs_dev: + * * Device which holds the client fs. For internal journal this will be * equal to j_dev. */ struct block_device *j_fs_dev; - /* Total maximum capacity of the journal region on disk. */ + /** + * @j_maxlen: Total maximum capacity of the journal region on disk. + */ unsigned int j_maxlen; - /* Number of buffers reserved from the running transaction */ + /** + * @j_reserved_credits: + * + * Number of buffers reserved from the running transaction. + */ atomic_t j_reserved_credits; - /* - * Protects the buffer lists and internal buffer state. + /** + * @j_list_lock: Protects the buffer lists and internal buffer state. */ spinlock_t j_list_lock; - /* Optional inode where we store the journal. If present, all */ - /* journal block numbers are mapped into this inode via */ - /* bmap(). */ + /** + * @j_inode: + * + * Optional inode where we store the journal. If present, all + * journal block numbers are mapped into this inode via bmap(). + */ struct inode *j_inode; - /* + /** + * @j_tail_sequence: + * * Sequence number of the oldest transaction in the log [j_state_lock] */ tid_t j_tail_sequence; - /* + /** + * @j_transaction_sequence: + * * Sequence number of the next transaction to grant [j_state_lock] */ tid_t j_transaction_sequence; - /* + /** + * @j_commit_sequence: + * * Sequence number of the most recently committed transaction * [j_state_lock]. */ tid_t j_commit_sequence; - /* + /** + * @j_commit_request: + * * Sequence number of the most recent transaction wanting commit * [j_state_lock] */ tid_t j_commit_request; - /* + /** + * @j_uuid: + * * Journal uuid: identifies the object (filesystem, LVM volume etc) * backed by this journal. This will eventually be replaced by an array * of uuids, allowing us to index multiple devices within a single @@ -958,85 +997,151 @@ struct journal_s */ __u8 j_uuid[16]; - /* Pointer to the current commit thread for this journal */ + /** + * @j_task: Pointer to the current commit thread for this journal. + */ struct task_struct *j_task; - /* + /** + * @j_max_transaction_buffers: + * * Maximum number of metadata buffers to allow in a single compound - * commit transaction + * commit transaction. */ int j_max_transaction_buffers; - /* + /** + * @j_commit_interval: + * * What is the maximum transaction lifetime before we begin a commit? */ unsigned long j_commit_interval; - /* The timer used to wakeup the commit thread: */ + /** + * @j_commit_timer: The timer used to wakeup the commit thread. + */ struct timer_list j_commit_timer; - /* - * The revoke table: maintains the list of revoked blocks in the - * current transaction. [j_revoke_lock] + /** + * @j_revoke_lock: Protect the revoke table. */ spinlock_t j_revoke_lock; + + /** + * @j_revoke: + * + * The revoke table - maintains the list of revoked blocks in the + * current transaction. + */ struct jbd2_revoke_table_s *j_revoke; + + /** + * @j_revoke_table: Alternate revoke tables for j_revoke. + */ struct jbd2_revoke_table_s *j_revoke_table[2]; - /* - * array of bhs for jbd2_journal_commit_transaction + /** + * @j_wbuf: Array of bhs for jbd2_journal_commit_transaction. */ struct buffer_head **j_wbuf; + + /** + * @j_wbufsize: + * + * Size of @j_wbuf array. + */ int j_wbufsize; - /* - * this is the pid of hte last person to run a synchronous operation - * through the journal + /** + * @j_last_sync_writer: + * + * The pid of the last person to run a synchronous operation + * through the journal. */ pid_t j_last_sync_writer; - /* - * the average amount of time in nanoseconds it takes to commit a + /** + * @j_average_commit_time: + * + * The average amount of time in nanoseconds it takes to commit a * transaction to disk. [j_state_lock] */ u64 j_average_commit_time; - /* - * minimum and maximum times that we should wait for - * additional filesystem operations to get batched into a - * synchronous handle in microseconds + /** + * @j_min_batch_time: + * + * Minimum time that we should wait for additional filesystem operations + * to get batched into a synchronous handle in microseconds. */ u32 j_min_batch_time; + + /** + * @j_max_batch_time: + * + * Maximum time that we should wait for additional filesystem operations + * to get batched into a synchronous handle in microseconds. + */ u32 j_max_batch_time; - /* This function is called when a transaction is closed */ + /** + * @j_commit_callback: + * + * This function is called when a transaction is closed. + */ void (*j_commit_callback)(journal_t *, transaction_t *); /* * Journal statistics */ + + /** + * @j_history_lock: Protect the transactions statistics history. + */ spinlock_t j_history_lock; + + /** + * @j_proc_entry: procfs entry for the jbd statistics directory. + */ struct proc_dir_entry *j_proc_entry; + + /** + * @j_stats: Overall statistics. + */ struct transaction_stats_s j_stats; - /* Failed journal commit ID */ + /** + * @j_failed_commit: Failed journal commit ID. + */ unsigned int j_failed_commit; - /* + /** + * @j_private: + * * An opaque pointer to fs-private information. ext3 puts its - * superblock pointer here + * superblock pointer here. */ void *j_private; - /* Reference to checksum algorithm driver via cryptoapi */ + /** + * @j_chksum_driver: + * + * Reference to checksum algorithm driver via cryptoapi. + */ struct crypto_shash *j_chksum_driver; - /* Precomputed journal UUID checksum for seeding other checksums */ + /** + * @j_csum_seed: + * + * Precomputed journal UUID checksum for seeding other checksums. + */ __u32 j_csum_seed; #ifdef CONFIG_DEBUG_LOCK_ALLOC - /* + /** + * @j_trans_commit_map: + * * Lockdep entity to track transaction commit dependencies. Handles * hold this "lock" for read, when we wait for commit, we acquire the * "lock" for writing. This matches the properties of jbd2 journalling Patches currently in stable-queue which might be from me(a)tobin.cc are queue-4.15/jbd2-fix-sphinx-kernel-doc-build-warnings.patch

7 years, 4 months

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Patch "ext4: save error to disk in __ext4_grp_locked_error()" has been added to the 4.15-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled ext4: save error to disk in __ext4_grp_locked_error() to the 4.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: ext4-save-error-to-disk-in-__ext4_grp_locked_error.patch and it can be found in the queue-4.15 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From 06f29cc81f0350261f59643a505010531130eea0 Mon Sep 17 00:00:00 2001 From: Zhouyi Zhou <zhouzhouyi(a)gmail.com> Date: Wed, 10 Jan 2018 00:34:19 -0500 Subject: ext4: save error to disk in __ext4_grp_locked_error() From: Zhouyi Zhou <zhouzhouyi(a)gmail.com> commit 06f29cc81f0350261f59643a505010531130eea0 upstream. In the function __ext4_grp_locked_error(), __save_error_info() is called to save error info in super block block, but does not sync that information to disk to info the subsequence fsck after reboot. This patch writes the error information to disk. After this patch, I think there is no obvious EXT4 error handle branches which leads to "Remounting filesystem read-only" will leave the disk partition miss the subsequence fsck. Signed-off-by: Zhouyi Zhou <zhouzhouyi(a)gmail.com> Signed-off-by: Theodore Ts'o <tytso(a)mit.edu> Cc: stable(a)vger.kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- fs/ext4/super.c | 1 + 1 file changed, 1 insertion(+) --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -742,6 +742,7 @@ __acquires(bitlock) } ext4_unlock_group(sb, grp); + ext4_commit_super(sb, 1); ext4_handle_error(sb); /* * We only get here in the ERRORS_RO case; relocking the group Patches currently in stable-queue which might be from zhouzhouyi(a)gmail.com are queue-4.15/ext4-save-error-to-disk-in-__ext4_grp_locked_error.patch

7 years, 4 months

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Patch "ext4: fix a race in the ext4 shutdown path" has been added to the 4.15-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled ext4: fix a race in the ext4 shutdown path to the 4.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: ext4-fix-a-race-in-the-ext4-shutdown-path.patch and it can be found in the queue-4.15 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From abbc3f9395c76d554a9ed27d4b1ebfb5d9b0e4ca Mon Sep 17 00:00:00 2001 From: Harshad Shirwadkar <harshads(a)google.com> Date: Wed, 10 Jan 2018 00:13:13 -0500 Subject: ext4: fix a race in the ext4 shutdown path From: Harshad Shirwadkar <harshads(a)google.com> commit abbc3f9395c76d554a9ed27d4b1ebfb5d9b0e4ca upstream. This patch fixes a race between the shutdown path and bio completion handling. In the ext4 direct io path with async io, after submitting a bio to the block layer, if journal starting fails, ext4_direct_IO_write() would bail out pretending that the IO failed. The caller would have had no way of knowing whether or not the IO was successfully submitted. So instead, we return -EIOCBQUEUED in this case. Now, the caller knows that the IO was submitted. The bio completion handler takes care of the error. Tested: Ran the shutdown xfstest test 461 in loop for over 2 hours across 4 machines resulting in over 400 runs. Verified that the race didn't occur. Usually the race was seen in about 20-30 iterations. Signed-off-by: Harshad Shirwadkar <harshads(a)google.com> Signed-off-by: Theodore Ts'o <tytso(a)mit.edu> Cc: stable(a)vger.kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- fs/ext4/inode.c | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-) --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -3767,10 +3767,18 @@ static ssize_t ext4_direct_IO_write(stru /* Credits for sb + inode write */ handle = ext4_journal_start(inode, EXT4_HT_INODE, 2); if (IS_ERR(handle)) { - /* This is really bad luck. We've written the data - * but cannot extend i_size. Bail out and pretend - * the write failed... */ - ret = PTR_ERR(handle); + /* + * We wrote the data but cannot extend + * i_size. Bail out. In async io case, we do + * not return error here because we have + * already submmitted the corresponding + * bio. Returning error here makes the caller + * think that this IO is done and failed + * resulting in race with bio's completion + * handler. + */ + if (!ret) + ret = PTR_ERR(handle); if (inode->i_nlink) ext4_orphan_del(NULL, inode); Patches currently in stable-queue which might be from harshads(a)google.com are queue-4.15/ext4-fix-a-race-in-the-ext4-shutdown-path.patch

7 years, 4 months

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Patch "ext4: correct documentation for grpid mount option" has been added to the 4.15-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled ext4: correct documentation for grpid mount option to the 4.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: ext4-correct-documentation-for-grpid-mount-option.patch and it can be found in the queue-4.15 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From 9f0372488cc9243018a812e8cfbf27de650b187b Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ernesto=20A=2E=20Fern=C3=A1ndez?= <ernesto.mnd.fernandez(a)gmail.com> Date: Thu, 11 Jan 2018 13:43:33 -0500 Subject: ext4: correct documentation for grpid mount option MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Ernesto A. Fernández <ernesto.mnd.fernandez(a)gmail.com> commit 9f0372488cc9243018a812e8cfbf27de650b187b upstream. The grpid option is currently described as being the same as nogrpid. Signed-off-by: Ernesto A. Fernández <ernesto.mnd.fernandez(a)gmail.com> Signed-off-by: Theodore Ts'o <tytso(a)mit.edu> Cc: stable(a)vger.kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- Documentation/filesystems/ext4.txt | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/Documentation/filesystems/ext4.txt +++ b/Documentation/filesystems/ext4.txt @@ -233,7 +233,7 @@ data_err=ignore(*) Just print an error m data_err=abort Abort the journal if an error occurs in a file data buffer in ordered mode. -grpid Give objects the same group ID as their creator. +grpid New objects have the group ID of their parent. bsdgroups nogrpid (*) New objects have the group ID of their creator. Patches currently in stable-queue which might be from ernesto.mnd.fernandez(a)gmail.com are queue-4.15/ext4-correct-documentation-for-grpid-mount-option.patch

7 years, 4 months

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Patch "drm/ttm: Fix 'buf' pointer update in ttm_bo_vm_access_kmap() (v2)" has been added to the 4.15-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled drm/ttm: Fix 'buf' pointer update in ttm_bo_vm_access_kmap() (v2) to the 4.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: drm-ttm-fix-buf-pointer-update-in-ttm_bo_vm_access_kmap-v2.patch and it can be found in the queue-4.15 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From 95244db2d3f743f37e69446a2807dd1a42750542 Mon Sep 17 00:00:00 2001 From: Tom St Denis <tom.stdenis(a)amd.com> Date: Fri, 26 Jan 2018 09:32:29 -0500 Subject: drm/ttm: Fix 'buf' pointer update in ttm_bo_vm_access_kmap() (v2) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Tom St Denis <tom.stdenis(a)amd.com> commit 95244db2d3f743f37e69446a2807dd1a42750542 upstream. The buf pointer was not being incremented inside the loop meaning the same block of data would be read or written repeatedly. (v2) Change 'buf' pointer to uint8_t* type Cc: stable(a)vger.kernel.org Fixes: 09ac4fcb3f25 ("drm/ttm: Implement vm_operations_struct.access v2") Signed-off-by: Tom St Denis <tom.stdenis(a)amd.com> Reviewed-by: Christian König <christian.koenig(a)amd.com> Signed-off-by: Alex Deucher <alexander.deucher(a)amd.com> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- drivers/gpu/drm/ttm/ttm_bo_vm.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/drivers/gpu/drm/ttm/ttm_bo_vm.c +++ b/drivers/gpu/drm/ttm/ttm_bo_vm.c @@ -299,7 +299,7 @@ static void ttm_bo_vm_close(struct vm_ar static int ttm_bo_vm_access_kmap(struct ttm_buffer_object *bo, unsigned long offset, - void *buf, int len, int write) + uint8_t *buf, int len, int write) { unsigned long page = offset >> PAGE_SHIFT; unsigned long bytes_left = len; @@ -328,6 +328,7 @@ static int ttm_bo_vm_access_kmap(struct ttm_bo_kunmap(&map); page++; + buf += bytes; bytes_left -= bytes; offset = 0; } while (bytes_left); Patches currently in stable-queue which might be from tom.stdenis(a)amd.com are queue-4.15/drm-ttm-fix-buf-pointer-update-in-ttm_bo_vm_access_kmap-v2.patch

7 years, 4 months

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Patch "drm/ttm: Don't add swapped BOs to swap-LRU list" has been added to the 4.15-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled drm/ttm: Don't add swapped BOs to swap-LRU list to the 4.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: drm-ttm-don-t-add-swapped-bos-to-swap-lru-list.patch and it can be found in the queue-4.15 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From fd5002d6a3c602664b07668a24df4ef7a43bf078 Mon Sep 17 00:00:00 2001 From: Felix Kuehling <Felix.Kuehling(a)amd.com> Date: Wed, 17 Jan 2018 23:52:03 -0500 Subject: drm/ttm: Don't add swapped BOs to swap-LRU list MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Felix Kuehling <Felix.Kuehling(a)amd.com> commit fd5002d6a3c602664b07668a24df4ef7a43bf078 upstream. A BO that's already swapped would be added back to the swap-LRU list for example if its validation failed under high memory pressure. This could later lead to swapping it out again and leaking previous swap storage. This commit adds a condition to prevent that from happening. v2: Check page_flags instead of swap_storage Signed-off-by: Felix Kuehling <Felix.Kuehling(a)amd.com> Reviewed-by: Christian König <christian.koenig(a)amd.com> Signed-off-by: Alex Deucher <alexander.deucher(a)amd.com> Cc: stable(a)vger.kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- drivers/gpu/drm/ttm/ttm_bo.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/drivers/gpu/drm/ttm/ttm_bo.c +++ b/drivers/gpu/drm/ttm/ttm_bo.c @@ -175,7 +175,8 @@ void ttm_bo_add_to_lru(struct ttm_buffer list_add_tail(&bo->lru, &man->lru[bo->priority]); kref_get(&bo->list_kref); - if (bo->ttm && !(bo->ttm->page_flags & TTM_PAGE_FLAG_SG)) { + if (bo->ttm && !(bo->ttm->page_flags & + (TTM_PAGE_FLAG_SG | TTM_PAGE_FLAG_SWAPPED))) { list_add_tail(&bo->swap, &bo->glob->swap_lru[bo->priority]); kref_get(&bo->list_kref); Patches currently in stable-queue which might be from Felix.Kuehling(a)amd.com are queue-4.15/drm-ttm-don-t-add-swapped-bos-to-swap-lru-list.patch

7 years, 4 months

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Patch "drm/radeon: adjust tested variable" has been added to the 4.15-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled drm/radeon: adjust tested variable to the 4.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: drm-radeon-adjust-tested-variable.patch and it can be found in the queue-4.15 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From 3a61b527b4e1f285d21b6e9e623dc45cf8bb391f Mon Sep 17 00:00:00 2001 From: Julia Lawall <Julia.Lawall(a)lip6.fr> Date: Sat, 27 Jan 2018 15:28:15 +0100 Subject: drm/radeon: adjust tested variable MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Julia Lawall <Julia.Lawall(a)lip6.fr> commit 3a61b527b4e1f285d21b6e9e623dc45cf8bb391f upstream. Check the variable that was most recently initialized. The semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ expression x, y, f, g, e, m; statement S1,S2,S3,S4; @@ x = f(...); if (\(<+...x...+>\&e\)) S1 else S2 ( x = g(...); | m = g(...,&x,...); | y = g(...); *if (e) S3 else S4 ) // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall(a)lip6.fr> Reviewed-by: Christian König <christian.koenig(a)amd.com> Signed-off-by: Alex Deucher <alexander.deucher(a)amd.com> Cc: stable(a)vger.kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- drivers/gpu/drm/radeon/radeon_uvd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/gpu/drm/radeon/radeon_uvd.c +++ b/drivers/gpu/drm/radeon/radeon_uvd.c @@ -995,7 +995,7 @@ int radeon_uvd_calc_upll_dividers(struct /* calc dclk divider with current vco freq */ dclk_div = radeon_uvd_calc_upll_post_div(vco_freq, dclk, pd_min, pd_even); - if (vclk_div > pd_max) + if (dclk_div > pd_max) break; /* vco is too big, it has to stop */ /* calc score with current vco freq */ Patches currently in stable-queue which might be from Julia.Lawall(a)lip6.fr are queue-4.15/drm-radeon-adjust-tested-variable.patch

7 years, 4 months

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Patch "drm/qxl: unref cursor bo when finished with it" has been added to the 4.15-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled drm/qxl: unref cursor bo when finished with it to the 4.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: drm-qxl-unref-cursor-bo-when-finished-with-it.patch and it can be found in the queue-4.15 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From 16c6db3688734b27487a42d0c2a1062d0b2bad03 Mon Sep 17 00:00:00 2001 From: Ray Strode <rstrode(a)redhat.com> Date: Mon, 27 Nov 2017 16:50:09 -0500 Subject: drm/qxl: unref cursor bo when finished with it From: Ray Strode <rstrode(a)redhat.com> commit 16c6db3688734b27487a42d0c2a1062d0b2bad03 upstream. qxl_cursor_atomic_update allocs a bo for the cursor that it never frees up at the end of the function. This commit fixes that. Signed-off-by: Ray Strode <rstrode(a)redhat.com> Cc: stable(a)vger.kernel.org Signed-off-by: Dave Airlie <airlied(a)redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- drivers/gpu/drm/qxl/qxl_display.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) --- a/drivers/gpu/drm/qxl/qxl_display.c +++ b/drivers/gpu/drm/qxl/qxl_display.c @@ -575,7 +575,7 @@ static void qxl_cursor_atomic_update(str struct qxl_cursor_cmd *cmd; struct qxl_cursor *cursor; struct drm_gem_object *obj; - struct qxl_bo *cursor_bo, *user_bo = NULL; + struct qxl_bo *cursor_bo = NULL, *user_bo = NULL; int ret; void *user_ptr; int size = 64*64*4; @@ -645,6 +645,8 @@ static void qxl_cursor_atomic_update(str qxl_push_cursor_ring_release(qdev, release, QXL_CMD_CURSOR, false); qxl_release_fence_buffer_objects(release); + qxl_bo_unref(&cursor_bo); + return; out_backoff: Patches currently in stable-queue which might be from rstrode(a)redhat.com are queue-4.15/drm-qxl-unref-cursor-bo-when-finished-with-it.patch queue-4.15/drm-qxl-reapply-cursor-after-resetting-primary.patch

7 years, 4 months

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Patch "drm/radeon: Add dpm quirk for Jet PRO (v2)" has been added to the 4.15-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled drm/radeon: Add dpm quirk for Jet PRO (v2) to the 4.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: drm-radeon-add-dpm-quirk-for-jet-pro-v2.patch and it can be found in the queue-4.15 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From 239b5f64e12b1f09f506c164dff0374924782979 Mon Sep 17 00:00:00 2001 From: Alex Deucher <alexander.deucher(a)amd.com> Date: Tue, 21 Nov 2017 12:09:38 -0500 Subject: drm/radeon: Add dpm quirk for Jet PRO (v2) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Alex Deucher <alexander.deucher(a)amd.com> commit 239b5f64e12b1f09f506c164dff0374924782979 upstream. Fixes stability issues. v2: clamp sclk to 600 Mhz Bug: https://bugs.freedesktop.org/show_bug.cgi?id=103370 Acked-by: Christian König <christian.koenig(a)amd.com> Signed-off-by: Alex Deucher <alexander.deucher(a)amd.com> Cc: stable(a)vger.kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- drivers/gpu/drm/radeon/si_dpm.c | 5 +++++ 1 file changed, 5 insertions(+) --- a/drivers/gpu/drm/radeon/si_dpm.c +++ b/drivers/gpu/drm/radeon/si_dpm.c @@ -2984,6 +2984,11 @@ static void si_apply_state_adjust_rules( (rdev->pdev->device == 0x6667)) { max_sclk = 75000; } + if ((rdev->pdev->revision == 0xC3) || + (rdev->pdev->device == 0x6665)) { + max_sclk = 60000; + max_mclk = 80000; + } } else if (rdev->family == CHIP_OLAND) { if ((rdev->pdev->revision == 0xC7) || (rdev->pdev->revision == 0x80) || Patches currently in stable-queue which might be from alexander.deucher(a)amd.com are queue-4.15/dma-buf-fix-reservation_object_wait_timeout_rcu-once-more-v2.patch queue-4.15/drm-amd-powerplay-fix-smu_table_entry.handle-type.patch queue-4.15/drm-ttm-fix-buf-pointer-update-in-ttm_bo_vm_access_kmap-v2.patch queue-4.15/drm-radeon-add-dpm-quirk-for-jet-pro-v2.patch queue-4.15/drm-ttm-don-t-add-swapped-bos-to-swap-lru-list.patch queue-4.15/drm-radeon-adjust-tested-variable.patch

7 years, 4 months

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