Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D71F1C433FE for ; Tue, 4 Jan 2022 11:44:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232531AbiADLoY (ORCPT ); Tue, 4 Jan 2022 06:44:24 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44084 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232511AbiADLoW (ORCPT ); Tue, 4 Jan 2022 06:44:22 -0500 Received: from mail-yb1-xb2e.google.com (mail-yb1-xb2e.google.com [IPv6:2607:f8b0:4864:20::b2e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E0E71C061761 for ; Tue, 4 Jan 2022 03:44:21 -0800 (PST) Received: by mail-yb1-xb2e.google.com with SMTP id j83so88607055ybg.2 for ; Tue, 04 Jan 2022 03:44:21 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=mime-version:from:date:message-id:subject:to:cc; bh=9BX9i8x1KnaOKwxvPaFzteUxmUJbwmrN/yeLyWpAkDo=; b=oZ66q+CNRdEdE3UytaaeO8TyOFEj7/I7Jq0NP6VpkSeVX7IPjaEYkvwQDDeA4f3Gmn T4qzlS1z4iAhb+8RlxZjFgA6vX2kMTf2EwNnAqIRuvqpVuLLM4bR/+Xe+nFSRoPE8hfM 1N1WeuFIFUndhtCIpShAKlPYsI+hIPPR6fwjxwvtYa6k5HfvXlzjr0WWH021tb6go6bo DqCrvAdeXSKABZdWQoAC99cCL6U9hUOK1mcugIqv9M5xSPK0BexLm87DcxW2ZiMse6Ji eU+l/U9KSYRdDB5Jlmng3ztn/YgzzzHZxQH8fA95VyMSSoV2JNHAIeXMMUQDML00Ua6B Po6Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:from:date:message-id:subject:to:cc; bh=9BX9i8x1KnaOKwxvPaFzteUxmUJbwmrN/yeLyWpAkDo=; b=WXvYuAaYuJK7w9tXsYFml8Qu3ylM08j9woee5neSTxayAxFHsXAIp79Ik/puijzhwL H30CANYz/KAWy2FUsF73Hxr+o9fpbb0cb9ltBw7JtSHLQjCrmeRNNU4V5/Xh2H6xni6+ M7pk7cygIm8DGnc5rgjhZODo/zCa6IV98AEV1w8j62KB3a3aiWO665x4B8s0ppj380wW ec6VLpDTGhBOTXvbsbvkt66cUsDL32pqkohiy/qGgpMmHOLITTHb0GRbGWzeXYjuw10S rn4LPLWdhHzhRzRaDhs9e38v27NeXteSTStO+SB3t+k0wHMiI318C3DUwhMe29cJ/jRJ UFFw== X-Gm-Message-State: AOAM532/1jemJ1qUKQwNqGzKpt36eaCMIEgx53QCdkdeCSY68i2xG00v Oag3H9qLHgyiYlA2QkEQQpprmoulry+x9LNfx8v+1J58rNdo7A== X-Google-Smtp-Source: ABdhPJyz/Or1F5BaXe2bJDdv6MfM+/6NstqaynJ7DQyUSUPP8UqfAr98qDs6wB/QU2hQVjBaQgNZFSkA+/1Ffk0wUpA= X-Received: by 2002:a25:9c44:: with SMTP id x4mr48308700ybo.84.1641296661054; Tue, 04 Jan 2022 03:44:21 -0800 (PST) MIME-Version: 1.0 From: kvartet Date: Tue, 4 Jan 2022 19:44:10 +0800 Message-ID: Subject: INFO: task hung in __filemap_get_folio To: Andrew Morton , linux-mm@kvack.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Cc: sunhao.th@gmail.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, When using Syzkaller to fuzz the latest Linux kernel, the following crash was triggered. HEAD commit: a7904a538933 Linux 5.16-rc6 git tree: upstream console output: https://paste.ubuntu.com/p/ttm2fNzkvN/ kernel config: https://paste.ubuntu.com/p/FDDNHDxtwz/plain/ Sorry, I don't have a reproducer for this crash, hope the symbolized report can help. If you fix this issue, please add the following tag to the commit: Reported-by: Yiru Xu INFO: task rs:main Q:Reg:6758 blocked for more than 143 seconds. Not tainted 5.16.0-rc6 #9 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:rs:main Q:Reg state:D stack:25832 pid: 6758 ppid: 1 flags:0x00000000 Call Trace: context_switch kernel/sched/core.c:4972 [inline] __schedule+0xcd9/0x2530 kernel/sched/core.c:6253 schedule+0xd2/0x260 kernel/sched/core.c:6326 io_schedule+0xb3/0x120 kernel/sched/core.c:8371 folio_wait_bit_common+0x524/0xa30 mm/filemap.c:1371 __folio_lock mm/filemap.c:1649 [inline] folio_lock include/linux/pagemap.h:783 [inline] __filemap_get_folio+0xdd1/0x1080 mm/filemap.c:1921 pagecache_get_page+0x2c/0x1a0 mm/folio-compat.c:125 ext4_da_write_begin+0x3bc/0xad0 fs/ext4/inode.c:2958 generic_perform_write+0x201/0x510 mm/filemap.c:3754 ext4_buffered_write_iter+0x170/0x360 fs/ext4/file.c:269 ext4_file_write_iter+0x42e/0x14a0 fs/ext4/file.c:681 call_write_iter include/linux/fs.h:2162 [inline] new_sync_write+0x432/0x660 fs/read_write.c:503 vfs_write+0x678/0xae0 fs/read_write.c:590 ksys_write+0x12d/0x250 fs/read_write.c:643 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7ff8402951cd RSP: 002b:00007ff83d850590 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007ff834021940 RCX: 00007ff8402951cd RDX: 0000000000000095 RSI: 00007ff834021940 RDI: 0000000000000006 RBP: 0000000000000000 R08: 0000000000000000 R09: 35313620205b203a R10: 0000000000000000 R11: 0000000000000293 R12: 00007ff8340216c0 R13: 00007ff83d8505b0 R14: 000055f3ac883360 R15: 0000000000000095 Showing all locks held in the system: 1 lock held by systemd/1: #0: ffff8880163dd550 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:838 [inline] #0: ffff8880163dd550 (mapping.invalidate_lock){++++}-{3:3}, at: page_cache_ra_unbounded+0x1bc/0x950 mm/readahead.c:194 1 lock held by khungtaskd/39: #0: ffffffff8bb80e20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458 3 locks held by kswapd0/122: 2 locks held by kswapd1/123: #0: ffffffff8bca5140 (fs_reclaim){+.+.}-{0:0}, at: try_to_freeze_unsafe include/linux/freezer.h:58 [inline] #0: ffffffff8bca5140 (fs_reclaim){+.+.}-{0:0}, at: try_to_freeze include/linux/freezer.h:67 [inline] #0: ffffffff8bca5140 (fs_reclaim){+.+.}-{0:0}, at: balance_pgdat+0xc63/0x1190 mm/vmscan.c:4227 #1: ffff8881104ca430 (&mapping->i_mmap_rwsem){++++}-{3:3}, at: i_mmap_lock_read include/linux/fs.h:513 [inline] #1: ffff8881104ca430 (&mapping->i_mmap_rwsem){++++}-{3:3}, at: rmap_walk_file+0x86d/0xc20 mm/rmap.c:2345 1 lock held by systemd-journal/3053: #0: ffffffff8bca5140 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:4585 [inline] #0: ffffffff8bca5140 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim mm/page_alloc.c:4609 [inline] #0: ffffffff8bca5140 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_slowpath.constprop.0+0x760/0x21b0 mm/page_alloc.c:5007 1 lock held by systemd-udevd/3061: #0: ffff888102e82d70 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:838 [inline] #0: ffff888102e82d70 (mapping.invalidate_lock){++++}-{3:3}, at: page_cache_ra_unbounded+0x1bc/0x950 mm/readahead.c:194 1 lock held by sd-resolve/3126: #0: ffff88801bc99980 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:838 [inline] #0: ffff88801bc99980 (mapping.invalidate_lock){++++}-{3:3}, at: page_cache_ra_unbounded+0x1bc/0x950 mm/readahead.c:194 1 lock held by cron/6288: #0: ffff88811bdd35c8 (&type->i_mutex_dir_key#4){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:793 [inline] #0: ffff88811bdd35c8 (&type->i_mutex_dir_key#4){++++}-{3:3}, at: lookup_slow fs/namei.c:1673 [inline] #0: ffff88811bdd35c8 (&type->i_mutex_dir_key#4){++++}-{3:3}, at: walk_component+0x400/0x6a0 fs/namei.c:1970 1 lock held by in:imklog/6757: #0: ffff88801bca6940 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:838 [inline] #0: ffff88801bca6940 (mapping.invalidate_lock){++++}-{3:3}, at: page_cache_ra_unbounded+0x1bc/0x950 mm/readahead.c:194 3 locks held by rs:main Q:Reg/6758: #0: ffff8880158d14f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:1034 #1: ffff88810138a460 (sb_writers#5){.+.+}-{0:0}, at: ksys_write+0x12d/0x250 fs/read_write.c:643 #2: ffff8881104db5c8 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: inode_lock include/linux/fs.h:783 [inline] #2: ffff8881104db5c8 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: ext4_buffered_write_iter+0xb8/0x360 fs/ext4/file.c:263 1 lock held by syz-fuzzer/6681: #0: ffff8881104c9980 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:838 [inline] #0: ffff8881104c9980 (mapping.invalidate_lock){++++}-{3:3}, at: page_cache_ra_unbounded+0x1bc/0x950 mm/readahead.c:194 1 lock held by syz-fuzzer/6705: #0: ffff8881104c9980 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:838 [inline] #0: ffff8881104c9980 (mapping.invalidate_lock){++++}-{3:3}, at: page_cache_ra_unbounded+0x1bc/0x950 mm/readahead.c:194 1 lock held by syz-fuzzer/6776: #0: ffff8881104c9980 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:838 [inline] #0: ffff8881104c9980 (mapping.invalidate_lock){++++}-{3:3}, at: page_cache_ra_unbounded+0x1bc/0x950 mm/readahead.c:194 1 lock held by syz-executor.7/6790: #0: ffff8881104ca430 (&mapping->i_mmap_rwsem){++++}-{3:3}, at: i_mmap_lock_write include/linux/fs.h:498 [inline] #0: ffff8881104ca430 (&mapping->i_mmap_rwsem){++++}-{3:3}, at: unlink_file_vma+0x7d/0x110 mm/mmap.c:169 2 locks held by kworker/u8:2/7091: 4 locks held by kworker/u8:6/10810: #0: ffff8881000ad938 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8881000ad938 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff8881000ad938 ((wq_completion)netns){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline] #0: ffff8881000ad938 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:635 [inline] #0: ffff8881000ad938 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:662 [inline] #0: ffff8881000ad938 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x8c3/0x16d0 kernel/workqueue.c:2269 #1: ffffc9000679fdc8 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x8f7/0x16d0 kernel/workqueue.c:2273 #2: ffffffff8d2eeb90 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x9b/0xa90 net/core/net_namespace.c:555 #3: ffffffff8bb89e70 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x44/0x430 kernel/rcu/tree.c:3985 1 lock held by syz-executor.1/13578: #0: ffff88810138a650 (sb_internal){.+.+}-{0:0}, at: evict+0x2ed/0x5a0 fs/inode.c:590 1 lock held by syz-executor.1/13694: #0: ffff88810138a650 (sb_internal){.+.+}-{0:0}, at: evict+0x2ed/0x5a0 fs/inode.c:590 1 lock held by syz-executor.3/18956: #0: ffff88810138a650 (sb_internal){.+.+}-{0:0}, at: evict+0x2ed/0x5a0 fs/inode.c:590 1 lock held by syz-executor.3/19004: #0: ffff88810138a650 (sb_internal){.+.+}-{0:0}, at: evict+0x2ed/0x5a0 fs/inode.c:590 1 lock held by syz-executor.3/19028: #0: ffff88810138a650 (sb_internal){.+.+}-{0:0}, at: evict+0x2ed/0x5a0 fs/inode.c:590 1 lock held by syz-executor.0/20801: #0: ffff88810138a650 (sb_internal){.+.+}-{0:0}, at: evict+0x2ed/0x5a0 fs/inode.c:590 1 lock held by syz-executor.0/20838: #0: ffff88810138a650 (sb_internal){.+.+}-{0:0}, at: evict+0x2ed/0x5a0 fs/inode.c:590 1 lock held by syz-executor.3/24608: #0: ffff88810138a650 (sb_internal){.+.+}-{0:0}, at: evict+0x2ed/0x5a0 fs/inode.c:590 1 lock held by syz-executor.3/24792: #0: ffff88810138a650 (sb_internal){.+.+}-{0:0}, at: evict+0x2ed/0x5a0 fs/inode.c:590 1 lock held by syz-executor.3/25080: #0: ffff88810138a650 (sb_internal){.+.+}-{0:0}, at: evict+0x2ed/0x5a0 fs/inode.c:590 1 lock held by syz-executor.3/28598: #0: ffff88810138a650 (sb_internal){.+.+}-{0:0}, at: evict+0x2ed/0x5a0 fs/inode.c:590 1 lock held by syz-executor.3/28694: #0: ffff88810138a650 (sb_internal){.+.+}-{0:0}, at: evict+0x2ed/0x5a0 fs/inode.c:590 1 lock held by syz-executor.3/28793: #0: ffff88810138a650 (sb_internal){.+.+}-{0:0}, at: evict+0x2ed/0x5a0 fs/inode.c:590 1 lock held by syz-executor.0/30370: #0: ffff88810138a650 (sb_internal){.+.+}-{0:0}, at: evict+0x2ed/0x5a0 fs/inode.c:590 1 lock held by syz-executor.0/30514: #0: ffff88810138a650 (sb_internal){.+.+}-{0:0}, at: evict+0x2ed/0x5a0 fs/inode.c:590 1 lock held by syz-executor.3/2238: #0: ffff88810138a650 (sb_internal){.+.+}-{0:0}, at: evict+0x2ed/0x5a0 fs/inode.c:590 1 lock held by syz-executor.3/2357: #0: ffff88810138a650 (sb_internal){.+.+}-{0:0}, at: evict+0x2ed/0x5a0 fs/inode.c:590 1 lock held by syz-executor.3/2551: #0: ffff88810138a650 (sb_internal){.+.+}-{0:0}, at: evict+0x2ed/0x5a0 fs/inode.c:590 2 locks held by kworker/3:67/2705: 1 lock held by syz-executor.0/2885: #0: ffff88810138a650 (sb_internal){.+.+}-{0:0}, at: evict+0x2ed/0x5a0 fs/inode.c:590 7 locks held by kworker/u10:22/3012: #0: ffff888013998138 ((wq_completion)writeback){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888013998138 ((wq_completion)writeback){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888013998138 ((wq_completion)writeback){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline] #0: ffff888013998138 ((wq_completion)writeback){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:635 [inline] #0: ffff888013998138 ((wq_completion)writeback){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:662 [inline] #0: ffff888013998138 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x8c3/0x16d0 kernel/workqueue.c:2269 #1: ffffc900149cfdc8 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x8f7/0x16d0 kernel/workqueue.c:2273 #2: ffff88810138a0e0 (&type->s_umount_key#36){++++}-{3:3}, at: trylock_super+0x1d/0x100 fs/super.c:418 #3: ffff88810138cbd8 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: do_writepages+0x19b/0x610 mm/page-writeback.c:2364 #4: ffff88810138e990 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xf58/0x1360 fs/jbd2/transaction.c:466 #5: ffff8881104db450 (&ei->i_data_sem){++++}-{3:3}, at: ext4_map_blocks+0x5e1/0x17d0 fs/ext4/inode.c:630 #6: ffff8881104ca430 (&mapping->i_mmap_rwsem){++++}-{3:3}, at: i_mmap_lock_read include/linux/fs.h:513 [inline] #6: ffff8881104ca430 (&mapping->i_mmap_rwsem){++++}-{3:3}, at: rmap_walk_file+0x86d/0xc20 mm/rmap.c:2345 1 lock held by syz-executor.7/3492: #0: ffff8880221a2478 (&anon_vma->rwsem){++++}-{3:3}, at: lock_anon_vma_root mm/rmap.c:246 [inline] #0: ffff8880221a2478 (&anon_vma->rwsem){++++}-{3:3}, at: unlink_anon_vmas+0x1fb/0x850 mm/rmap.c:402 1 lock held by syz-executor.1/4126: #0: ffff88810138a650 (sb_internal){.+.+}-{0:0}, at: evict+0x2ed/0x5a0 fs/inode.c:590 1 lock held by syz-executor.1/4151: #0: ffff88810138a650 (sb_internal){.+.+}-{0:0}, at: evict+0x2ed/0x5a0 fs/inode.c:590 1 lock held by syz-executor.1/4278: #0: ffff88810138a650 (sb_internal){.+.+}-{0:0}, at: evict+0x2ed/0x5a0 fs/inode.c:590 1 lock held by syz-executor.3/4358: #0: ffff88810138a650 (sb_internal){.+.+}-{0:0}, at: evict+0x2ed/0x5a0 fs/inode.c:590 1 lock held by syz-executor.3/4432: #0: ffff88810138a650 (sb_internal){.+.+}-{0:0}, at: evict+0x2ed/0x5a0 fs/inode.c:590 Best Regards, Yiru