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AJvYcCXDkVPHgd3OP+2n6QewoB5LShCwIPGSgq4gzNCVDuCx2GKwjP5EYcyGAM1T+LvUrsDVcogeYYHOMMg70nR4fg==@vger.kernel.org X-Gm-Message-State: AOJu0Yyeni15xIsokuchGhOlkLryYT0U0TSyZMeLwBrwtteqQoPaqGe8 oVO3R5SpU5emZpvgn8IwYIBgzr10gdDotFAnIpO8lzhnJNucJ656ofLG16zIwykRSwbNltqwqp3 8wZCWyJnK3SsdAV6qJyzTvvfi6d86lR/tmPdqbmewQQCJfPkG2PxYT5X3X+Q= X-Google-Smtp-Source: AGHT+IERXWmS2tXn4BGh//q6P9LQOl6kGfWPsMvduZ5bCztQN974AL0QORihYfKgFQ3Uxk/2k7VP6YoUcefZDq9oJgKd/Htpw10e Precedence: bulk X-Mailing-List: linux-bcachefs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:2195:b0:430:aea6:833f with SMTP id e9e14a558f8ab-430c525c688mr127344745ab.8.1760834020857; Sat, 18 Oct 2025 17:33:40 -0700 (PDT) Date: Sat, 18 Oct 2025 17:33:40 -0700 In-Reply-To: <68b976e8.050a0220.192772.0004.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <68f431e4.a70a0220.205af.000e.GAE@google.com> Subject: Re: [syzbot] [bcachefs?] WARNING in bch2_recovery_pass_want_ratelimit From: syzbot To: kent.overstreet@linux.dev, linux-bcachefs@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" syzbot has found a reproducer for the following issue on: HEAD commit: bf45a62baffc Merge branch 'for-next/core' into for-kernelci git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci console output: https://syzkaller.appspot.com/x/log.txt?x=172ae492580000 kernel config: https://syzkaller.appspot.com/x/.config?x=bd2356106f507975 dashboard link: https://syzkaller.appspot.com/bug?extid=3bf8b0169d7fcc0ebcd5 compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 userspace arch: arm64 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=124fda14580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14fb3de2580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/f0d4874557e9/disk-bf45a62b.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/0bf44a13b5b2/vmlinux-bf45a62b.xz kernel image: https://storage.googleapis.com/syzbot-assets/18db8bc9907c/Image-bf45a62b.gz.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/0638961e34c6/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+3bf8b0169d7fcc0ebcd5@syzkaller.appspotmail.com ------------[ cut here ]------------ WARNING: CPU: 1 PID: 6755 at fs/bcachefs/recovery_passes.c:174 bch2_recovery_pass_want_ratelimit+0x1c0/0x270 fs/bcachefs/recovery_passes.c:174 Modules linked in: CPU: 1 UID: 0 PID: 6755 Comm: bch-copygc/loop Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : bch2_recovery_pass_want_ratelimit+0x1c0/0x270 fs/bcachefs/recovery_passes.c:174 lr : bch2_recovery_pass_want_ratelimit+0x1c0/0x270 fs/bcachefs/recovery_passes.c:174 sp : ffff8000a1a76af0 x29: ffff8000a1a76af0 x28: ffff0000f69b8028 x27: ffff0000d4bfe198 x26: 1ffff0001434ed70 x25: dfff800000000000 x24: 0000000000000001 x23: ffff8000a1a76c00 x22: dfff800000000000 x21: 0000000000000000 x20: ffff0000ecf80000 x19: 000000000000000e x18: 00000000ffffffff x17: ffff80008280dad8 x16: ffff80008052b264 x15: 0000000000000001 x14: 1fffe00018c07b0b x13: 0000000000000000 x12: 0000000000000000 x11: 1ffff0001434ed95 x10: 0000000000ff0100 x9 : 0000000000000000 x8 : ffff0000c8658000 x7 : 2020202020202020 x6 : 696d206874697720 x5 : ffff0000c603d85d x4 : ffff0000c603d85b x3 : 0000000000000002 x2 : ffff8000a1a76b84 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: bch2_recovery_pass_want_ratelimit+0x1c0/0x270 fs/bcachefs/recovery_passes.c:174 (P) recovery_pass_needs_set+0xa0/0x468 fs/bcachefs/recovery_passes.c:302 bch2_run_explicit_recovery_pass+0x4c/0xec fs/bcachefs/recovery_passes.c:416 bch2_check_bucket_backpointer_mismatch+0x34c/0x3a0 fs/bcachefs/backpointers.c:1220 __bch2_move_data_phys+0x684/0x144c fs/bcachefs/move.c:1011 bch2_evacuate_bucket+0x220/0x34c fs/bcachefs/move.c:1082 bch2_copygc+0x2d80/0x3570 fs/bcachefs/movinggc.c:234 bch2_copygc_thread+0x898/0xd8c fs/bcachefs/movinggc.c:409 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 irq event stamp: 236 hardirqs last enabled at (235): [] kasan_quarantine_put+0x1a0/0x1c8 mm/kasan/quarantine.c:234 hardirqs last disabled at (236): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:434 softirqs last enabled at (0): [] copy_process+0x1134/0x31ec kernel/fork.c:2119 softirqs last disabled at (0): [<0000000000000000>] 0x0 ---[ end trace 0000000000000000 ]--- bc --- If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing.