BUG: sleeping function called from invalid context at kernel/locking/mutex.c:908 in_atomic(): 1, irqs_disabled(): 0, pid: 5444, name: syz-executor.4 2 locks held by syz-executor.4/5444: #0: 00000000d01cbc97 (&mm->mmap_sem){++++}, at: __might_fault+0xf4/0x1d0 mm/memory.c:4406 #1: 00000000537f7862 ((&toneport->timer)){+.-.}, at: lockdep_copy_map include/linux/lockdep.h:170 [inline] #1: 00000000537f7862 ((&toneport->timer)){+.-.}, at: call_timer_fn+0xce/0x5f0 kernel/time/timer.c:1315 CPU: 0 PID: 5444 Comm: syz-executor.4 Not tainted 5.1.0-rc3-319004-g43151d6 #6 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0xe8/0x16e lib/dump_stack.c:113 ___might_sleep.cold+0x11c/0x136 kernel/sched/core.c:6190 __mutex_lock_common kernel/locking/mutex.c:908 [inline] __mutex_lock+0xcd/0x12b0 kernel/locking/mutex.c:1072 line6_pcm_acquire+0x35/0x210 sound/usb/line6/pcm.c:311 call_timer_fn+0x161/0x5f0 kernel/time/timer.c:1325 expire_timers kernel/time/timer.c:1362 [inline] __run_timers kernel/time/timer.c:1681 [inline] __run_timers kernel/time/timer.c:1649 [inline] run_timer_softirq+0x58b/0x1400 kernel/time/timer.c:1694 __do_softirq+0x22a/0x8cd kernel/softirq.c:293 invoke_softirq kernel/softirq.c:374 [inline] irq_exit+0x187/0x1b0 kernel/softirq.c:414 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0xfe/0x4a0 arch/x86/kernel/apic/apic.c:1062 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:767 [inline] RIP: 0010:lock_acquire+0x15c/0x2f0 kernel/locking/lockdep.c:4214 Code: 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 7e 01 00 00 c7 83 3c 08 00 00 00 00 00 00 48 8b 7c 24 08 57 9d <0f> 1f 44 00 00 48 83 c4 20 5b 5d 41 5c 41 5d 41 5e 41 5f c3 65 8b RSP: 0018:ffff888073e9fd50 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000007 RBX: ffff888093c78000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff888093c78840 RDI: 0000000000000246 RBP: ffff88808cb2b508 R08: 0000000002dfe895 R09: ffffffff966ee0f0 R10: ffff888093c78840 R11: ffff888093c78000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000 __might_fault mm/memory.c:4407 [inline] __might_fault+0x157/0x1d0 mm/memory.c:4392 _copy_from_user+0x29/0x140 lib/usercopy.c:10 copy_from_user include/linux/uaccess.h:144 [inline] get_timespec64+0x7a/0x130 kernel/time/time.c:863 __do_sys_nanosleep kernel/time/hrtimer.c:1759 [inline] __se_sys_nanosleep kernel/time/hrtimer.c:1754 [inline] __x64_sys_nanosleep+0xb0/0x220 kernel/time/hrtimer.c:1754 do_syscall_64+0xcf/0x4f0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x486570 Code: 00 00 48 c7 c0 d4 ff ff ff 64 c7 00 16 00 00 00 31 c0 eb be 66 0f 1f 44 00 00 83 3d e1 01 5d 00 00 75 14 b8 23 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 b4 e0 f8 ff c3 48 83 ec 08 e8 ea 53 fd ff RSP: 002b:00007ffe0a5a8988 EFLAGS: 00000246 ORIG_RAX: 0000000000000023 RAX: ffffffffffffffda RBX: 000000000023e255 RCX: 0000000000486570 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007ffe0a5a8990 RBP: 0000000000000988 R08: 0000000000000001 R09: 0000000000a57940 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe0a5a89e0 R14: 000000000023e255 R15: 00007ffe0a5a89f0 ================================================================== BUG: KASAN: null-ptr-deref in memset include/linux/string.h:337 [inline] BUG: KASAN: null-ptr-deref in submit_audio_out_urb+0x91e/0x1780 sound/usb/line6/playback.c:246 Write of size 20 at addr 0000000000000010 by task syz-executor.4/5444 CPU: 0 PID: 5444 Comm: syz-executor.4 Tainted: G W 5.1.0-rc3-319004-g43151d6 #6 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0xe8/0x16e lib/dump_stack.c:113 kasan_report.cold+0x5/0x3c mm/kasan/report.c:321 memset+0x20/0x40 mm/kasan/common.c:115 memset include/linux/string.h:337 [inline] submit_audio_out_urb+0x91e/0x1780 sound/usb/line6/playback.c:246 line6_submit_audio_out_all_urbs+0xce/0x120 sound/usb/line6/playback.c:295 line6_stream_start+0x15b/0x1f0 sound/usb/line6/pcm.c:199 line6_pcm_acquire+0x139/0x210 sound/usb/line6/pcm.c:322 call_timer_fn+0x161/0x5f0 kernel/time/timer.c:1325 expire_timers kernel/time/timer.c:1362 [inline] __run_timers kernel/time/timer.c:1681 [inline] __run_timers kernel/time/timer.c:1649 [inline] run_timer_softirq+0x58b/0x1400 kernel/time/timer.c:1694 __do_softirq+0x22a/0x8cd kernel/softirq.c:293 invoke_softirq kernel/softirq.c:374 [inline] irq_exit+0x187/0x1b0 kernel/softirq.c:414 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0xfe/0x4a0 arch/x86/kernel/apic/apic.c:1062 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:767 [inline] RIP: 0010:lock_acquire+0x15c/0x2f0 kernel/locking/lockdep.c:4214 Code: 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 7e 01 00 00 c7 83 3c 08 00 00 00 00 00 00 48 8b 7c 24 08 57 9d <0f> 1f 44 00 00 48 83 c4 20 5b 5d 41 5c 41 5d 41 5e 41 5f c3 65 8b RSP: 0018:ffff888073e9fd50 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000007 RBX: ffff888093c78000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff888093c78840 RDI: 0000000000000246 RBP: ffff88808cb2b508 R08: 0000000002dfe895 R09: ffffffff966ee0f0 R10: ffff888093c78840 R11: ffff888093c78000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000 __might_fault mm/memory.c:4407 [inline] __might_fault+0x157/0x1d0 mm/memory.c:4392 _copy_from_user+0x29/0x140 lib/usercopy.c:10 copy_from_user include/linux/uaccess.h:144 [inline] get_timespec64+0x7a/0x130 kernel/time/time.c:863 __do_sys_nanosleep kernel/time/hrtimer.c:1759 [inline] __se_sys_nanosleep kernel/time/hrtimer.c:1754 [inline] __x64_sys_nanosleep+0xb0/0x220 kernel/time/hrtimer.c:1754 do_syscall_64+0xcf/0x4f0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x486570 Code: 00 00 48 c7 c0 d4 ff ff ff 64 c7 00 16 00 00 00 31 c0 eb be 66 0f 1f 44 00 00 83 3d e1 01 5d 00 00 75 14 b8 23 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 b4 e0 f8 ff c3 48 83 ec 08 e8 ea 53 fd ff RSP: 002b:00007ffe0a5a8988 EFLAGS: 00000246 ORIG_RAX: 0000000000000023 RAX: ffffffffffffffda RBX: 000000000023e255 RCX: 0000000000486570 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007ffe0a5a8990 RBP: 0000000000000988 R08: 0000000000000001 R09: 0000000000a57940 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe0a5a89e0 R14: 000000000023e255 R15: 00007ffe0a5a89f0 ==================================================================