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Mon, 19 Oct 2026 13:04:32 -0700 (PDT) Date: Mon, 19 Oct 2026 13:04:32 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6ad677d0.a20cb897.960b0.0048.GAE@google.com> Subject: [syzbot] [sound?] [usb?] BUG: scheduling while atomic in wait_clear_urbs From: syzbot To: linux-kernel@vger.kernel.org, linux-sound@vger.kernel.org, linux-usb@vger.kernel.org, perex@perex.cz, syzkaller-bugs@googlegroups.com, tiwai@suse.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: b810335a0699 Add linux-next specific files for 20261015 git tree: linux-next console+strace: https://syzkaller.appspot.com/x/log.txt?x=167bffd1580000 kernel config: https://syzkaller.appspot.com/x/.config?x=1b8bbfb3c8b8bab9 dashboard link: https://syzkaller.appspot.com/bug?extid=4b408ec271028c02705a compiler: Debian clang version 22.1.8 (1~deb13u4), Debian LLD 22.1.8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=117bffd1580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=129b3e8e580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/d857324ce96e/disk-b810335a.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/c678b2144185/vmlinux-b810335a.xz kernel image: https://storage.googleapis.com/syzbot-assets/a48079386c10/bzImage-b810335a.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+4b408ec271028c02705a@syzkaller.appspotmail.com raw-gadget.0 gadget.0: fail, usb_ep_enable returned -22 usb 1-1: BOGUS urb xfer, pipe 0 != type 3 BUG: scheduling while atomic: syz-executor208/5624/0x00000002 locks held by syz-executor208/5624: 2, on CPU#1: #0: ffff8880375782c8 (&pcm->open_mutex){+.+.}-{4:4}, at: snd_pcm_oss_release+0x110/0x250 sound/core/oss/pcm_oss.c:2589 #1: ffff88807bbb7910 (&group->lock#2){..-.}-{3:3}, at: spin_lock_irq include/linux/spinlock.h:377 [inline] #1: ffff88807bbb7910 (&group->lock#2){..-.}-{3:3}, at: snd_pcm_group_lock_irq sound/core/pcm_native.c:103 [inline] #1: ffff88807bbb7910 (&group->lock#2){..-.}-{3:3}, at: snd_pcm_stream_lock_irq sound/core/pcm_native.c:142 [inline] #1: ffff88807bbb7910 (&group->lock#2){..-.}-{3:3}, at: class_pcm_stream_lock_irq_constructor include/sound/pcm.h:678 [inline] #1: ffff88807bbb7910 (&group->lock#2){..-.}-{3:3}, at: snd_pcm_drop+0xcc/0x780 sound/core/pcm_native.c:2323 Modules linked in: irq event stamp: 62624 hardirqs last enabled at (62623): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:219 [inline] hardirqs last enabled at (62623): [] _raw_spin_unlock_irq+0x23/0x50 kernel/locking/spinlock.c:229 hardirqs last disabled at (62624): [] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:163 [inline] hardirqs last disabled at (62624): [] _raw_spin_lock_irq+0x17/0x50 kernel/locking/spinlock.c:189 softirqs last enabled at (62310): [] __do_softirq kernel/softirq.c:679 [inline] softirqs last enabled at (62310): [] invoke_softirq kernel/softirq.c:519 [inline] softirqs last enabled at (62310): [] __irq_exit_rcu+0xcb/0x220 kernel/softirq.c:758 softirqs last disabled at (62299): [] __do_softirq kernel/softirq.c:679 [inline] softirqs last disabled at (62299): [] invoke_softirq kernel/softirq.c:519 [inline] softirqs last disabled at (62299): [] __irq_exit_rcu+0xcb/0x220 kernel/softirq.c:758 Preemption disabled at: [<0000000000000000>] 0x0 Kernel panic - not syncing: scheduling while atomic: panic_on_warn set ... CPU: 1 UID: 0 PID: 5624 Comm: syz-executor208 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Call Trace: vpanic+0x26f/0x710 kernel/panic.c:661 panic+0xc5/0xd0 kernel/panic.c:787 check_panic_on_warn+0x89/0xb0 kernel/panic.c:533 __schedule_bug+0xf1/0x150 kernel/sched/core.c:6143 schedule_debug kernel/sched/core.c:6172 [inline] __schedule+0x18b7/0x5820 kernel/sched/core.c:7232 __schedule_loop kernel/sched/core.c:7462 [inline] schedule+0x164/0x2b0 kernel/sched/core.c:7477 schedule_timeout+0x152/0x2c0 kernel/time/sleep_timeout.c:99 wait_clear_urbs+0x134/0x390 sound/usb/endpoint.c:1010 sync_pending_stops sound/usb/pcm.c:317 [inline] snd_usb_pcm_sync_stop+0x9c/0xb0 sound/usb/pcm.c:325 snd_pcm_sync_stop sound/core/pcm_native.c:648 [inline] snd_pcm_drop+0x57d/0x780 sound/core/pcm_native.c:2335 snd_pcm_release_substream+0x75/0x4a0 sound/core/pcm_native.c:2836 snd_pcm_oss_release_file sound/core/oss/pcm_oss.c:2413 [inline] snd_pcm_oss_release+0x144/0x250 sound/core/oss/pcm_oss.c:2590 __fput+0x408/0xa40 fs/file_table.c:513 fput_close_sync+0x11f/0x240 fs/file_table.c:619 filp_close_sync+0x6e/0xa0 fs/open.c:1897 close_files fs/file.c:572 [inline] put_files_struct+0x230/0x3c0 fs/file.c:584 do_exit+0x6f0/0x2360 kernel/exit.c:977 do_group_exit+0x22d/0x2f0 kernel/exit.c:1123 get_signal+0x1216/0x12c0 kernel/signal.c:3112 arch_do_signal_or_restart+0xbb/0x860 arch/x86/kernel/signal.c:337 __exit_to_user_mode_loop kernel/entry/common.c:66 [inline] exit_to_user_mode_loop+0x10e/0x770 kernel/entry/common.c:101 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:343 [inline] do_syscall_64+0x328/0x520 arch/x86/entry/syscall_64.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f41afbcdcc9 Code: Unable to access opcode bytes at 0x7f41afbcdc9f. RSP: 002b:00007ffc3a104688 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: 00000000002828c9 RBX: 0000000000000000 RCX: 00007f41afbcdcc9 RDX: 00000000fffffcd9 RSI: 0000200000002200 RDI: 0000000000000006 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000006 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc3a1047f8 R13: 431bde82d7b634db R14: 00007f41afc60c40 R15: 0000000000000002 Shutting down cpus with NMI Kernel Offset: disabled Rebooting in 86400 seconds.. --- 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. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title 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. 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) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup