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List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [syzbot] kernel BUG in close_ctree To: syzbot , clm@fb.com, dsterba@suse.com, josef@toxicpanda.com, linux-btrfs@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com References: <0000000000003f315b05ee1ed3f4@google.com> Content-Language: en-US From: Qu Wenruo Autocrypt: addr=quwenruo.btrfs@gmx.com; keydata= xsBNBFnVga8BCACyhFP3ExcTIuB73jDIBA/vSoYcTyysFQzPvez64TUSCv1SgXEByR7fju3o 8RfaWuHCnkkea5luuTZMqfgTXrun2dqNVYDNOV6RIVrc4YuG20yhC1epnV55fJCThqij0MRL 1NxPKXIlEdHvN0Kov3CtWA+R1iNN0RCeVun7rmOrrjBK573aWC5sgP7YsBOLK79H3tmUtz6b 9Imuj0ZyEsa76Xg9PX9Hn2myKj1hfWGS+5og9Va4hrwQC8ipjXik6NKR5GDV+hOZkktU81G5 gkQtGB9jOAYRs86QG/b7PtIlbd3+pppT0gaS+wvwMs8cuNG+Pu6KO1oC4jgdseFLu7NpABEB AAHNIlF1IFdlbnJ1byA8cXV3ZW5ydW8uYnRyZnNAZ214LmNvbT7CwJQEEwEIAD4CGwMFCwkI BwIGFQgJCgsCBBYCAwECHgECF4AWIQQt33LlpaVbqJ2qQuHCPZHzoSX+qAUCZxF1YAUJEP5a sQAKCRDCPZHzoSX+qF+mB/9gXu9C3BV0omDZBDWevJHxpWpOwQ8DxZEbk9b9LcrQlWdhFhyn 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EabHUL8gaW8tX9bh9hLRKC9evGRPQY6NnoPTejaBUtNEOuxG0jdUk03TpcEgVgauyjuh7/yP6 QTCNISycQe/c7+qc64QsCCwpPDdZ3vhnVHUqB7FCe8jGzhaBVT3V95FUJswpGrdwhiZBKb3op IH33EgbjU5AHfKFFBriKmQfiVegXcdYk8cXY1X9NnOksQvuk47ZUUXn2b1Vn00cy64iBqxI6N dvVf8s4OLrnbBFSUv1JHooFr8cRvZLvVUgW9AgimDDDYTvCmw #syz test: https://github.com/btrfs/linux.git for-next =E5=9C=A8 2022/11/23 18:40, syzbot =E5=86=99=E9=81=93: > Hello, > > syzbot found the following issue on: > > HEAD commit: eb7081409f94 Linux 6.1-rc6 > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=3D17e5b3098800= 00 > kernel config: https://syzkaller.appspot.com/x/.config?x=3D5db36e7087dc= ccae > dashboard link: https://syzkaller.appspot.com/bug?extid=3D2665d678fffcc4= 608e18 > compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binut= ils for Debian) 2.35.2 > > Unfortunately, I don't have any reproducer for this issue yet. > > Downloadable assets: > disk image: https://storage.googleapis.com/syzbot-assets/12e9c825ff47/di= sk-eb708140.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/107e5e091c9e/vmlin= ux-eb708140.xz > kernel image: https://storage.googleapis.com/syzbot-assets/605ab211617d/= bzImage-eb708140.xz > > IMPORTANT: if you fix the issue, please add the following tag to the com= mit: > Reported-by: syzbot+2665d678fffcc4608e18@syzkaller.appspotmail.com > > assertion failed: list_empty(&fs_info->delayed_iputs), in fs/btrfs/disk-= io.c:4664 > ------------[ cut here ]------------ > kernel BUG at fs/btrfs/ctree.h:3713! > invalid opcode: 0000 [#1] PREEMPT SMP KASAN > CPU: 0 PID: 3696 Comm: syz-executor.2 Not tainted 6.1.0-rc6-syzkaller #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS = Google 10/26/2022 > RIP: 0010:assertfail.constprop.0+0x27/0x29 fs/btrfs/ctree.h:3713 > Code: 3f c9 f7 41 54 41 89 f4 55 48 89 fd e8 a2 3f c9 f7 44 89 e1 48 89 = ee 48 c7 c2 60 a4 95 8a 48 c7 c7 a0 a4 95 8a e8 00 76 f5 ff <0f> 0b e8 82 = 3f c9 f7 e8 8d 3d 15 f8 be 73 04 00 00 48 c7 c7 40 a5 > RSP: 0018:ffffc90003727be8 EFLAGS: 00010282 > RAX: 0000000000000051 RBX: ffff888027d9c000 RCX: 0000000000000000 > RDX: ffff88804a6b6280 RSI: ffffffff8164973c RDI: fffff520006e4f6f > RBP: ffffffff8a95dac0 R08: 0000000000000051 R09: 0000000000000000 > R10: 0000000080000000 R11: 0000000000000000 R12: 0000000000001238 > R13: 0000000000000000 R14: 0000000000000000 R15: ffff88801da29200 > FS: 0000555555bec400(0000) GS:ffff8880b9a00000(0000) knlGS:000000000000= 0000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 00007f17654d56be CR3: 0000000031a82000 CR4: 00000000003506f0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > Call Trace: > > close_ctree+0x502/0xdc7 fs/btrfs/disk-io.c:4664 > generic_shutdown_super+0x158/0x410 fs/super.c:492 > kill_anon_super+0x3a/0x60 fs/super.c:1086 > btrfs_kill_super+0x3c/0x50 fs/btrfs/super.c:2441 > deactivate_locked_super+0x98/0x160 fs/super.c:332 > deactivate_super+0xb1/0xd0 fs/super.c:363 > cleanup_mnt+0x2ae/0x3d0 fs/namespace.c:1186 > task_work_run+0x16f/0x270 kernel/task_work.c:179 > resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] > exit_to_user_mode_loop kernel/entry/common.c:171 [inline] > exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:203 > __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] > syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:296 > do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86 > entry_SYSCALL_64_after_hwframe+0x63/0xcd > RIP: 0033:0x7f7827a8d5f7 > Code: ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 31 f6 e9 = 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 = ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 > RSP: 002b:00007ffeef557068 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 > RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f7827a8d5f7 > RDX: 00007ffeef55713c RSI: 000000000000000a RDI: 00007ffeef557130 > RBP: 00007ffeef557130 R08: 00000000ffffffff R09: 00007ffeef556f00 > R10: 0000555555bed8b3 R11: 0000000000000246 R12: 00007f7827ae6b46 > R13: 00007ffeef5581f0 R14: 0000555555bed810 R15: 00007ffeef558230 > > Modules linked in: > ---[ end trace 0000000000000000 ]--- > RIP: 0010:assertfail.constprop.0+0x27/0x29 fs/btrfs/ctree.h:3713 > Code: 3f c9 f7 41 54 41 89 f4 55 48 89 fd e8 a2 3f c9 f7 44 89 e1 48 89 = ee 48 c7 c2 60 a4 95 8a 48 c7 c7 a0 a4 95 8a e8 00 76 f5 ff <0f> 0b e8 82 = 3f c9 f7 e8 8d 3d 15 f8 be 73 04 00 00 48 c7 c7 40 a5 > RSP: 0018:ffffc90003727be8 EFLAGS: 00010282 > RAX: 0000000000000051 RBX: ffff888027d9c000 RCX: 0000000000000000 > RDX: ffff88804a6b6280 RSI: ffffffff8164973c RDI: fffff520006e4f6f > RBP: ffffffff8a95dac0 R08: 0000000000000051 R09: 0000000000000000 > R10: 0000000080000000 R11: 0000000000000000 R12: 0000000000001238 > R13: 0000000000000000 R14: 0000000000000000 R15: ffff88801da29200 > FS: 0000555555bec400(0000) GS:ffff8880b9b00000(0000) knlGS:000000000000= 0000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 00007fd78dea19d8 CR3: 0000000031a82000 CR4: 00000000003506e0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > > > --- > This report is generated by a bot. It may contain errors. > See https://goo.gl/tpsmEJ for more information about syzbot. > syzbot engineers can be reached at syzkaller@googlegroups.com. > > syzbot will keep track of this issue. See: > https://goo.gl/tpsmEJ#status for how to communicate with syzbot. >