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Mon, 09 Oct 2023 07:01:34 -0700 (PDT) Date: Mon, 09 Oct 2023 07:01:34 -0700 In-Reply-To: <20231009112906.2143-1-hdanton@sina.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000025dc9c0607490767@google.com> Subject: Re: [syzbot] [reiserfs?] possible deadlock in super_lock From: syzbot To: hdanton@sina.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: WARNING in fs_bdev_sync ------------[ cut here ]------------ WARNING: CPU: 0 PID: 6681 at fs/super.c:1464 fs_bdev_sync+0x138/0x168 fs/super.c:1464 Modules linked in: CPU: 0 PID: 6681 Comm: syz-executor.4 Not tainted 6.6.0-rc5-syzkaller-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : fs_bdev_sync+0x138/0x168 fs/super.c:1464 lr : fs_bdev_sync+0x138/0x168 fs/super.c:1464 sp : ffff800097637a70 x29: ffff800097637a70 x28: ffff0000d6699bc0 x27: 0000000000000003 x26: dfff800000000000 x25: ffff700012ec6f58 x24: ffff800097637ac0 x23: 0000000000001261 x22: dfff800000000000 x21: 0000000000000001 x20: 0000000000000000 x19: ffff0000c657c000 x18: 0000000000000000 x17: 0000000000000000 x16: ffff80008031d534 x15: 0000000000000000 x14: 0000000000000000 x13: 0000000000000000 x12: 00000000c0101282 x11: 0000000000000000 x10: 0000000000000000 x9 : 0000000000000000 x8 : ffff0000d6699bc0 x7 : 0000000000000000 x6 : 000000000000003f x5 : 0000000000000040 x4 : ffffffffffffffff x3 : 0000000000000000 x2 : 0000000000000015 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: fs_bdev_sync+0x138/0x168 fs/super.c:1464 blkdev_flushbuf block/ioctl.c:371 [inline] blkdev_common_ioctl+0x838/0x286c block/ioctl.c:500 blkdev_ioctl+0x35c/0xae4 block/ioctl.c:622 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:871 [inline] __se_sys_ioctl fs/ioctl.c:857 [inline] __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:857 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x58/0x16c arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 irq event stamp: 116 hardirqs last enabled at (115): [] kasan_quarantine_put+0x1a0/0x1c8 mm/kasan/quarantine.c:240 hardirqs last disabled at (116): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:436 softirqs last enabled at (92): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (90): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 ---[ end trace 0000000000000000 ]--- Tested on: commit: 94f6f055 Linux 6.6-rc5 git tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master console output: https://syzkaller.appspot.com/x/log.txt?x=129ec4e9680000 kernel config: https://syzkaller.appspot.com/x/.config?x=1b8c825e0d5f3f72 dashboard link: https://syzkaller.appspot.com/bug?extid=062317ea1d0a6d5e29e7 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: arm64 patch: https://syzkaller.appspot.com/x/patch.diff?x=156813ee680000