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[2403:580d:fda1::299]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-21542d8d5e6sm21673685ad.206.2024.11.29.22.36.54 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 29 Nov 2024 22:36:57 -0800 (PST) Message-ID: <7a8955d4-4283-426f-8bbf-8f81787fb08e@suse.com> Date: Sat, 30 Nov 2024 17:06:52 +1030 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [syzbot] [btrfs?] kernel BUG in __folio_start_writeback To: syzbot , akpm@linux-foundation.org, clm@fb.com, dsterba@suse.com, josef@toxicpanda.com, linux-btrfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, syzkaller-bugs@googlegroups.com, willy@infradead.org References: <67432dee.050a0220.1cc393.0041.GAE@google.com> Content-Language: en-US From: Qu Wenruo Autocrypt: addr=wqu@suse.com; keydata= xsBNBFnVga8BCACyhFP3ExcTIuB73jDIBA/vSoYcTyysFQzPvez64TUSCv1SgXEByR7fju3o 8RfaWuHCnkkea5luuTZMqfgTXrun2dqNVYDNOV6RIVrc4YuG20yhC1epnV55fJCThqij0MRL 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https://syzkaller.appspot.com/bug?extid=aac7bff85be224de5156 > compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13840778580000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17840778580000 > > Downloadable assets: > disk image: https://storage.googleapis.com/syzbot-assets/d32a8e8c5aae/disk-228a1157.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/28d5c070092e/vmlinux-228a1157.xz > kernel image: https://storage.googleapis.com/syzbot-assets/45af4bfd9e8e/bzImage-228a1157.xz > mounted in repro: https://storage.googleapis.com/syzbot-assets/69603aa12e8f/mount_0.gz > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+aac7bff85be224de5156@syzkaller.appspotmail.com > > __fput+0x5ba/0xa50 fs/file_table.c:458 > task_work_run+0x24f/0x310 kernel/task_work.c:239 > resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] > exit_to_user_mode_loop kernel/entry/common.c:114 [inline] > exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline] > __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] > syscall_exit_to_user_mode+0x13f/0x340 kernel/entry/common.c:218 > do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 > entry_SYSCALL_64_after_hwframe+0x77/0x7f > ------------[ cut here ]------------ > kernel BUG at mm/page-writeback.c:3119! > Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI > CPU: 0 UID: 0 PID: 12 Comm: kworker/u8:1 Not tainted 6.12.0-syzkaller-08446-g228a1157fb9f #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 > Workqueue: btrfs-delalloc btrfs_work_helper > RIP: 0010:__folio_start_writeback+0xc06/0x1050 mm/page-writeback.c:3119 > Code: 25 ff 0f 00 00 0f 84 d3 00 00 00 e8 14 ae c3 ff e9 ba f5 ff ff e8 0a ae c3 ff 4c 89 f7 48 c7 c6 00 2e 14 8c e8 8b 4f 0d 00 90 <0f> 0b e8 f3 ad c3 ff 4c 89 f7 48 c7 c6 60 34 14 8c e8 74 4f 0d 00 > RSP: 0018:ffffc90000117500 EFLAGS: 00010246 > RAX: ed413247a2060f00 RBX: 0000000000000002 RCX: 0000000000000001 > RDX: dffffc0000000000 RSI: ffffffff8c0ad620 RDI: 0000000000000001 > RBP: ffffc90000117670 R08: ffffffff942b2967 R09: 1ffffffff285652c > R10: dffffc0000000000 R11: fffffbfff285652d R12: 0000000000000000 > R13: 1ffff92000022eac R14: ffffea0001cab940 R15: ffff888077139710 > FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 00007f6661870000 CR3: 00000000792b2000 CR4: 00000000003526f0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > Call Trace: > > process_one_folio fs/btrfs/extent_io.c:187 [inline] > __process_folios_contig+0x31c/0x540 fs/btrfs/extent_io.c:216 > submit_one_async_extent fs/btrfs/inode.c:1229 [inline] > submit_compressed_extents+0xdb3/0x16e0 fs/btrfs/inode.c:1632 > run_ordered_work fs/btrfs/async-thread.c:245 [inline] > btrfs_work_helper+0x56b/0xc50 fs/btrfs/async-thread.c:324 > process_one_work kernel/workqueue.c:3229 [inline] > process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310 > worker_thread+0x870/0xd30 kernel/workqueue.c:3391 > kthread+0x2f0/0x390 kernel/kthread.c:389 > ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 > ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 > > Modules linked in: > ---[ end trace 0000000000000000 ]--- > RIP: 0010:__folio_start_writeback+0xc06/0x1050 mm/page-writeback.c:3119 > Code: 25 ff 0f 00 00 0f 84 d3 00 00 00 e8 14 ae c3 ff e9 ba f5 ff ff e8 0a ae c3 ff 4c 89 f7 48 c7 c6 00 2e 14 8c e8 8b 4f 0d 00 90 <0f> 0b e8 f3 ad c3 ff 4c 89 f7 48 c7 c6 60 34 14 8c e8 74 4f 0d 00 > RSP: 0018:ffffc90000117500 EFLAGS: 00010246 > RAX: ed413247a2060f00 RBX: 0000000000000002 RCX: 0000000000000001 > RDX: dffffc0000000000 RSI: ffffffff8c0ad620 RDI: 0000000000000001 > RBP: ffffc90000117670 R08: ffffffff942b2967 R09: 1ffffffff285652c > R10: dffffc0000000000 R11: fffffbfff285652d R12: 0000000000000000 > R13: 1ffff92000022eac R14: ffffea0001cab940 R15: ffff888077139710 > FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 000055ec8463e668 CR3: 000000007ed5e000 CR4: 00000000003526f0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > > > --- > This report is generated by a bot. 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