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Mon, 26 May 2025 03:41:24 -0700 (PDT) Content-Type: text/plain; charset=us-ascii Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 (Mac OS X Mail 16.0 \(3826.500.181.1.5\)) Subject: Re: [syzbot] [bcachefs?] WARNING in rhashtable_init_noprof From: Alan Huang In-Reply-To: <68342b55.a70a0220.253bc2.0092.GAE@google.com> Date: Mon, 26 May 2025 18:41:09 +0800 Cc: kent.overstreet@linux.dev, linux-bcachefs@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Transfer-Encoding: quoted-printable Message-Id: <05DB907D-8EF0-4E16-A133-3E32A8F8FD1C@gmail.com> References: <68342b55.a70a0220.253bc2.0092.GAE@google.com> To: syzbot X-Mailer: Apple Mail (2.3826.500.181.1.5) On May 26, 2025, at 16:50, syzbot = wrote: >=20 > Hello, >=20 > syzbot found the following issue on: >=20 > HEAD commit: 176e917e010c Add linux-next specific files for = 20250523 > git tree: linux-next > console output: = https://syzkaller.appspot.com/x/log.txt?x=3D13d555f4580000 > kernel config: = https://syzkaller.appspot.com/x/.config?x=3De7902c752bef748 > dashboard link: = https://syzkaller.appspot.com/bug?extid=3Dbcc38a9556d0324c2ec2 > compiler: Debian clang version 20.1.6 = (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD = 20.1.6 > syz repro: = https://syzkaller.appspot.com/x/repro.syz?x=3D145948e8580000 > C reproducer: = https://syzkaller.appspot.com/x/repro.c?x=3D13d6a170580000 >=20 > Downloadable assets: > disk image: = https://storage.googleapis.com/syzbot-assets/5f7692c642fa/disk-176e917e.ra= w.xz > vmlinux: = https://storage.googleapis.com/syzbot-assets/057a442d42d0/vmlinux-176e917e= .xz > kernel image: = https://storage.googleapis.com/syzbot-assets/8f8ebdb4dd96/bzImage-176e917e= .xz > mounted in repro: = https://storage.googleapis.com/syzbot-assets/d3d310848021/mount_0.gz >=20 > IMPORTANT: if you fix the issue, please add the following tag to the = commit: > Reported-by: syzbot+bcc38a9556d0324c2ec2@syzkaller.appspotmail.com >=20 > ODEBUG: object ffffc9000469fb90 is on stack ffffc90004698000, but NOT = annotated. > ------------[ cut here ]------------ > WARNING: CPU: 1 PID: 5924 at lib/debugobjects.c:655 = debug_object_is_on_stack lib/debugobjects.c:655 [inline] > WARNING: CPU: 1 PID: 5924 at lib/debugobjects.c:655 = lookup_object_or_alloc lib/debugobjects.c:688 [inline] > WARNING: CPU: 1 PID: 5924 at lib/debugobjects.c:655 = __debug_object_init+0x2c9/0x3c0 lib/debugobjects.c:743 > Modules linked in: > CPU: 1 UID: 0 PID: 5924 Comm: bch-copygc/loop Not tainted = 6.15.0-rc7-next-20250523-syzkaller #0 PREEMPT(full)=20 > Hardware name: Google Google Compute Engine/Google Compute Engine, = BIOS Google 05/07/2025 > RIP: 0010:debug_object_is_on_stack lib/debugobjects.c:655 [inline] > RIP: 0010:lookup_object_or_alloc lib/debugobjects.c:688 [inline] > RIP: 0010:__debug_object_init+0x2c9/0x3c0 lib/debugobjects.c:743 > Code: cc cc cc 41 ff c7 44 89 3d a4 18 14 15 48 c7 c1 80 9b e2 8b 48 = c7 c7 e0 9b e2 8b 84 c0 48 0f 45 f9 48 89 de e8 48 2b 61 fc 90 <0f> 0b = 90 e9 c0 fe ff ff e8 3a 1c 00 00 8b 05 1c 9c c6 09 3b 05 1a > RSP: 0018:ffffc9000469f6e0 EFLAGS: 00010046 > RAX: 0000000000000050 RBX: ffffc9000469fb90 RCX: 0aa01120dfd08500 > RDX: 0000000000000000 RSI: 0000000080000001 RDI: 0000000000000000 > RBP: ffff88802f5c9e20 R08: ffffc9000469f3c7 R09: 1ffff920008d3e78 > R10: dffffc0000000000 R11: fffff520008d3e79 R12: 0000000000000040 > R13: ffff8880771e5d20 R14: dffffc0000000000 R15: 0000000000000001 > FS: 0000000000000000(0000) GS:ffff888125d56000(0000) = knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 00007f1c5ee80000 CR3: 0000000077540000 CR4: 00000000003526f0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > Call Trace: > > rhashtable_init_noprof+0x7c0/0xbb0 lib/rhashtable.c:1085 > bch2_copygc_thread+0x116/0xdc0 fs/bcachefs/movinggc.c:355 > kthread+0x711/0x8a0 kernel/kthread.c:464 > ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148 > ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 > >=20 >=20 > --- > 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. >=20 > syzbot will keep track of this issue. See: > https://goo.gl/tpsmEJ#status for how to communicate with syzbot. >=20 > If the report is already addressed, let syzbot know by replying with: > #syz fix: exact-commit-title >=20 > 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. >=20 > If you want to overwrite report's subsystems, reply with: > #syz set subsystems: new-subsystem > (See the list of subsystem names on the web dashboard) >=20 > If the report is a duplicate of another one, reply with: > #syz dup: exact-subject-of-another-report >=20 > If you want to undo deduplication, reply with: > #syz undup >=20 #syz test: https://github.com/alanskind/bcachefs = 9b38df1f0d770aef29fd6aea023b28b053e14ecf