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Sun, 11 Apr 2021 08:08:12 -0700 (PDT) Date: Sun, 11 Apr 2021 08:08:12 -0700 In-Reply-To: <00000000000020424005bf118296@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000000c3f5405bfb3c458@google.com> Subject: Re: [syzbot] WARNING in fw_load_sysfs_fallback From: syzbot To: gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, rafael@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 syzbot has found a reproducer for the following issue on: HEAD commit: 52e44129 Merge branch 'for-5.12-fixes' of git://git.kernel.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=17f1d196d00000 kernel config: https://syzkaller.appspot.com/x/.config?x=f91155ccddaf919c dashboard link: https://syzkaller.appspot.com/bug?extid=b064fbd5fc8b2cfae49d compiler: Debian clang version 11.0.1-2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12a536a6d00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=11339dd9d00000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+b064fbd5fc8b2cfae49d@syzkaller.appspotmail.com ------------[ cut here ]------------ sysfs group 'power' not found for kobject 'ueagle-atm!adi930.fw' WARNING: CPU: 0 PID: 5 at fs/sysfs/group.c:281 sysfs_remove_group+0x16e/0x280 fs/sysfs/group.c:279 Modules linked in: CPU: 0 PID: 5 Comm: kworker/0:0 Not tainted 5.12.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events request_firmware_work_func RIP: 0010:sysfs_remove_group+0x16e/0x280 fs/sysfs/group.c:279 Code: 89 e0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 e7 e8 37 92 cb ff 49 8b 14 24 48 c7 c7 40 1a c2 89 4c 89 f6 31 c0 e8 b2 87 56 ff <0f> 0b 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 40 a3 87 ff 49 8d 5e 20 RSP: 0018:ffffc90000ca7a90 EFLAGS: 00010246 RAX: f97192423f200500 RBX: ffff8880351a4038 RCX: ffff888011528000 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: 1ffffffff1459c30 R08: ffffffff8160b932 R09: ffffed1017385fe8 R10: ffffed1017385fe8 R11: 0000000000000000 R12: ffff8880351a4008 R13: dffffc0000000000 R14: ffffffff8a2ce140 R15: ffff888035bbc3a0 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffcb4541b47 CR3: 000000001d137000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: device_del+0x26a/0xa90 drivers/base/core.c:3398 fw_load_sysfs_fallback+0x53e/0x720 drivers/base/firmware_loader/fallback.c:543 fw_load_from_user_helper+0x242/0x320 drivers/base/firmware_loader/fallback.c:581 _request_firmware+0x2c5/0x4c0 drivers/base/firmware_loader/main.c:831 request_firmware_work_func+0xb8/0x1e0 drivers/base/firmware_loader/main.c:1077 process_one_work+0x789/0xfd0 kernel/workqueue.c:2275 worker_thread+0xac1/0x1300 kernel/workqueue.c:2421 kthread+0x39a/0x3c0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294