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Sat, 01 Nov 2025 09:18:03 -0700 (PDT) Date: Sat, 01 Nov 2025 09:18:03 -0700 In-Reply-To: <20251101153157.837686-1-m@maowtm.org> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <690632bb.050a0220.29fc44.0005.GAE@google.com> Subject: Re: [syzbot] [fs?] BUG: sleeping function called from invalid context in hook_sb_delete From: syzbot To: linux-kernel@vger.kernel.org, m@maowtm.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: WARNING in get_data Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1 Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9 ------------[ cut here ]------------ WARNING: kernel/printk/printk_ringbuffer.c:1278 at get_data+0x48a/0x840 kernel/printk/printk_ringbuffer.c:1278, CPU#1: kworker/u9:1/5147 Modules linked in: CPU: 1 UID: 0 PID: 5147 Comm: kworker/u9:1 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 Workqueue: hci0 hci_rx_work RIP: 0010:get_data+0x48a/0x840 kernel/printk/printk_ringbuffer.c:1278 Code: 83 c4 f8 48 b8 00 00 00 00 00 fc ff df 41 0f b6 04 07 84 c0 0f 85 ee 01 00 00 44 89 65 00 49 83 c5 08 eb 13 e8 b7 d6 1e 00 90 <0f> 0b 90 eb 05 e8 ac d6 1e 00 45 31 ed 4c 89 e8 48 83 c4 28 5b 41 RSP: 0018:ffffc9000ed9eec0 EFLAGS: 00010293 RAX: ffffffff81a1ef09 RBX: 00003fffffffffff RCX: ffff888035008000 RDX: 0000000000000000 RSI: 00003fffffffffff RDI: 0000000000000000 RBP: 0000000000000012 R08: 0000000000000ea9 R09: 0000005832e2457e R10: 0000005832e2457e R11: 0000141b82000035 R12: 0000000000000012 R13: 0000000000000000 R14: ffffc9000ed9f008 R15: 1ffffffff1c0ab06 FS: 0000000000000000(0000) GS:ffff888125dd3000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffea26700c0 CR3: 0000000075b8a000 CR4: 00000000003526f0 Call Trace: copy_data kernel/printk/printk_ringbuffer.c:1857 [inline] prb_read kernel/printk/printk_ringbuffer.c:1966 [inline] _prb_read_valid+0x672/0xa90 kernel/printk/printk_ringbuffer.c:2143 prb_read_valid+0x3c/0x60 kernel/printk/printk_ringbuffer.c:2215 printk_get_next_message+0x15c/0x7b0 kernel/printk/printk.c:2978 console_emit_next_record kernel/printk/printk.c:3062 [inline] console_flush_one_record kernel/printk/printk.c:3194 [inline] console_flush_all+0x4cc/0xb10 kernel/printk/printk.c:3268 __console_flush_and_unlock kernel/printk/printk.c:3298 [inline] console_unlock+0xbb/0x190 kernel/printk/printk.c:3338 vprintk_emit+0x4c5/0x590 kernel/printk/printk.c:2423 _printk+0xcf/0x120 kernel/printk/printk.c:2448 bt_warn+0x10b/0x160 net/bluetooth/lib.c:276 hci_cc_func net/bluetooth/hci_event.c:4192 [inline] hci_cmd_complete_evt+0x493/0xa80 net/bluetooth/hci_event.c:4216 hci_event_func net/bluetooth/hci_event.c:7629 [inline] hci_event_packet+0x78f/0x1260 net/bluetooth/hci_event.c:7686 hci_rx_work+0x45d/0xfc0 net/bluetooth/hci_core.c:4099 process_one_work+0x94a/0x15d0 kernel/workqueue.c:3267 process_scheduled_works kernel/workqueue.c:3350 [inline] worker_thread+0x9b0/0xee0 kernel/workqueue.c:3431 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Tested on: commit: 98bd8b16 Add linux-next specific files for 20251031 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=12a8e32f980000 kernel config: https://syzkaller.appspot.com/x/.config?x=90be0b22166ec0b9 dashboard link: https://syzkaller.appspot.com/bug?extid=12479ae15958fc3f54ec compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 patch: https://syzkaller.appspot.com/x/patch.diff?x=1430e32f980000