------------[ cut here ]------------ debug_locks && !(lock_is_held(&(__rq_lockp(rq))->dep_map) != 0) WARNING: kernel/sched/sched.h:1600 at lockdep_assert_rq_held kernel/sched/sched.h:1600 [inline], CPU#0: syz.5.723/9718 WARNING: kernel/sched/sched.h:1600 at lockdep_assert_rq_held kernel/sched/sched.h:1597 [inline], CPU#0: syz.5.723/9718 WARNING: kernel/sched/sched.h:1600 at update_rq_clock+0x40a/0xd20 kernel/sched/core.c:850, CPU#0: syz.5.723/9718 Modules linked in: CPU: 0 UID: 0 PID: 9718 Comm: syz.5.723 Tainted: G U L syzkaller #0 PREEMPT(full) Tainted: [U]=USER, [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:lockdep_assert_rq_held kernel/sched/sched.h:1600 [inline] RIP: 0010:lockdep_assert_rq_held kernel/sched/sched.h:1597 [inline] RIP: 0010:update_rq_clock+0x40a/0xd20 kernel/sched/core.c:850 Code: ab 48 0b 00 00 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e 41 5f e9 48 06 ba 09 a8 04 0f 84 df fc ff ff 90 0f 0b 90 e9 d6 fc ff ff 90 <0f> 0b 90 e9 92 fc ff ff 4c 8d 83 40 0b 00 00 48 b8 00 00 00 00 00 RSP: 0018:ffffc9000fc17700 EFLAGS: 00010046 RAX: 0000000000000000 RBX: ffff8880b853b280 RCX: 0000000000000001 RDX: 0000000000000046 RSI: ffffffff8de53714 RDI: ffffffff8c1aeb20 RBP: ffffc9000fc178a8 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff90d98717 R11: 0000000000000000 R12: ffffffff90d9bae4 R13: ffff8880b853c0c0 R14: ffff88801e6e9e40 R15: ffff8880b853b280 FS: 00007fa94f7826c0(0000) GS:ffff888124351000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000020000027f000 CR3: 0000000076cc6000 CR4: 00000000003526f0 Call Trace: pick_next_task kernel/sched/core.c:6129 [inline] __schedule+0x1b7d/0x60e0 kernel/sched/core.c:6848 preempt_schedule_irq+0x50/0x90 kernel/sched/core.c:7234 irqentry_exit+0x17b/0x670 kernel/entry/common.c:239 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:do_user_addr_fault+0x17e/0x12f0 arch/x86/mm/fault.c:1289 Code: 31 ff 41 81 e6 00 02 00 00 4c 89 f6 e8 1b 21 4f 00 4d 85 f6 0f 84 16 09 00 00 e8 2d 26 4f 00 e8 c8 22 57 00 fb 0f 1f 44 00 00 1d 26 4f 00 48 89 d8 31 ff 41 be 14 02 00 00 83 e0 40 49 89 c7 RSP: 0018:ffffc9000fc179b8 EFLAGS: 00000206 RAX: 0000000000008599 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8de79726 RDI: ffffffff8c1aeb20 RBP: ffffc9000fc17a58 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 000020000027f000 R13: ffff888031041e40 R14: 0000000000000200 R15: 0000000000000000 handle_page_fault arch/x86/mm/fault.c:1474 [inline] exc_page_fault+0x6f/0xd0 arch/x86/mm/fault.c:1527 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 RIP: 0010:rep_movs_alternative+0x4a/0x90 arch/x86/lib/copy_user_64.S:74 Code: 93 04 00 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 8b 06 48 89 07 48 83 c6 08 48 83 c7 08 83 e9 08 74 db 83 f9 08 73 e8 eb c5 a4 e9 8f 93 04 00 48 8b 06 48 89 07 48 8d 47 08 48 83 e0 f8 48 RSP: 0018:ffffc9000fc17b08 EFLAGS: 00050202 RAX: 0000000000000001 RBX: 000020000027e85a RCX: 00000000000000c0 RDX: 0000000000000001 RSI: 000020000027f000 RDI: ffff888029792f40 RBP: 0000000000000866 R08: 0000000000000001 R09: ffffed10052f25ff R10: ffff888029792fff R11: 0000000000000000 R12: 0000000000000000 R13: ffff88802979279a R14: dffffc0000000000 R15: 000020000027e85a copy_user_generic arch/x86/include/asm/uaccess_64.h:126 [inline] raw_copy_from_user arch/x86/include/asm/uaccess_64.h:141 [inline] _inline_copy_from_user include/linux/uaccess.h:185 [inline] _copy_from_user+0x98/0xd0 lib/usercopy.c:18 copy_from_user include/linux/uaccess.h:223 [inline] snd_rawmidi_kernel_write1+0x390/0x7c0 sound/core/rawmidi.c:1560 snd_rawmidi_write+0x2dc/0xc60 sound/core/rawmidi.c:1629 vfs_write+0x2aa/0x1070 fs/read_write.c:686 ksys_write+0x1f8/0x250 fs/read_write.c:740 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa94e99c629 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fa94f782028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fa94ec16090 RCX: 00007fa94e99c629 RDX: 000000100000a3d9 RSI: 00002000000000c0 RDI: 0000000000000005 RBP: 00007fa94ea32b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fa94ec16128 R14: 00007fa94ec16090 R15: 00007ffcf3782228 ---------------- Code disassembly (best guess): 0: 31 ff xor %edi,%edi 2: 41 81 e6 00 02 00 00 and $0x200,%r14d 9: 4c 89 f6 mov %r14,%rsi c: e8 1b 21 4f 00 call 0x4f212c 11: 4d 85 f6 test %r14,%r14 14: 0f 84 16 09 00 00 je 0x930 1a: e8 2d 26 4f 00 call 0x4f264c 1f: e8 c8 22 57 00 call 0x5722ec 24: fb sti 25: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) * 2a: e8 1d 26 4f 00 call 0x4f264c <-- trapping instruction 2f: 48 89 d8 mov %rbx,%rax 32: 31 ff xor %edi,%edi 34: 41 be 14 02 00 00 mov $0x214,%r14d 3a: 83 e0 40 and $0x40,%eax 3d: 49 89 c7 mov %rax,%r15