general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] CPU: 0 PID: 7378 Comm: syz-executor.0 Not tainted 5.9.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:snd_ctl_release+0x69/0x3e0 sound/core/control.c:114 Code: 44 24 10 4c 8b b0 b0 01 00 00 48 c7 80 b0 01 00 00 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 49 8d 7e 10 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 f7 02 00 00 49 8b 46 10 4d 8d 6e 08 4c 8d a0 48 RSP: 0018:ffffc90008b6fde8 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff8880a04a3ac0 RCX: 1ffffffff11eb370 RDX: 0000000000000002 RSI: ffffffff860cbc5b RDI: 0000000000000010 RBP: ffff8880a04a3ac0 R08: 0000000000000001 R09: ffffffff89cc5567 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a04a3b44 R13: ffff8880a04a3ae8 R14: 0000000000000000 R15: ffff8880a4bc2100 FS: 0000000000000000(0000) GS:ffff8880ae600000(0063) knlGS:0000000009ace900 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000096781000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __fput+0x285/0x920 fs/file_table.c:281 task_work_run+0xdd/0x190 kernel/task_work.c:141 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:140 [inline] exit_to_user_mode_prepare+0x1e1/0x200 kernel/entry/common.c:167 syscall_exit_to_user_mode+0x7e/0x2e0 kernel/entry/common.c:242 __do_fast_syscall_32+0x63/0x80 arch/x86/entry/common.c:127 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:149 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7faa549 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 002b:00000000ff97935c EFLAGS: 00000292 ORIG_RAX: 0000000000000006 RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 RDX: 0000000000000004 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 6b816397a61fbea4 ]--- RIP: 0010:snd_ctl_release+0x69/0x3e0 sound/core/control.c:114 Code: 44 24 10 4c 8b b0 b0 01 00 00 48 c7 80 b0 01 00 00 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 49 8d 7e 10 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 f7 02 00 00 49 8b 46 10 4d 8d 6e 08 4c 8d a0 48 RSP: 0018:ffffc90008b6fde8 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff8880a04a3ac0 RCX: 1ffffffff11eb370 RDX: 0000000000000002 RSI: ffffffff860cbc5b RDI: 0000000000000010 RBP: ffff8880a04a3ac0 R08: 0000000000000001 R09: ffffffff89cc5567 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a04a3b44 R13: ffff8880a04a3ae8 R14: 0000000000000000 R15: ffff8880a4bc2100 FS: 0000000000000000(0000) GS:ffff8880ae600000(0063) knlGS:0000000009ace900 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000096781000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400