syzbot

WARNING: CPU: 0 PID: 3647 at sound/core/pcm_lib.c:1681 snd_pcm_hw_param_last+0x28b/0x670 sound/core/pcm_lib.c:1681
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 3647 Comm: syzkaller312889 Not tainted 4.15.0-rc6+ #245
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:53
 panic+0x1e4/0x41c kernel/panic.c:183
 __warn+0x1dc/0x200 kernel/panic.c:547
 report_bug+0x211/0x2d0 lib/bug.c:184
 fixup_bug.part.11+0x37/0x80 arch/x86/kernel/traps.c:178
 fixup_bug arch/x86/kernel/traps.c:247 [inline]
 do_error_trap+0x2d7/0x3e0 arch/x86/kernel/traps.c:296
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315
 invalid_op+0x22/0x40 arch/x86/entry/entry_64.S:1079
RIP: 0010:snd_pcm_hw_param_last+0x28b/0x670 sound/core/pcm_lib.c:1681
RSP: 0000:ffff8801d0597340 EFLAGS: 00010293
RAX: ffff8801be9526c0 RBX: ffff8801bf6b1b40 RCX: ffffffff841bb75b
RDX: 0000000000000000 RSI: 00000000ffffffea RDI: ffffed003a0b2e60
RBP: ffff8801d0597388 R08: ffffed003a0b2d97 R09: ffff8801d0596cb0
R10: 0000000000000001 R11: ffffed003a0b2d96 R12: 000000000000000f
R13: 00000000ffffffea R14: 0000000000000007 R15: 0000000000008000
 snd_pcm_hw_param_near.constprop.27+0x6f5/0x9a0 sound/core/oss/pcm_oss.c:455
 snd_pcm_oss_change_params+0x1833/0x3720 sound/core/oss/pcm_oss.c:973
 snd_pcm_oss_make_ready+0xaa/0x130 sound/core/oss/pcm_oss.c:1128
 snd_pcm_oss_sync+0x34b/0x830 sound/core/oss/pcm_oss.c:1578
 snd_pcm_oss_release+0x20b/0x280 sound/core/oss/pcm_oss.c:2431
 __fput+0x327/0x7e0 fs/file_table.c:210
 ____fput+0x15/0x20 fs/file_table.c:244
 task_work_run+0x199/0x270 kernel/task_work.c:113
 exit_task_work include/linux/task_work.h:22 [inline]
 do_exit+0x9bb/0x1ad0 kernel/exit.c:865
 do_group_exit+0x149/0x400 kernel/exit.c:968
 SYSC_exit_group kernel/exit.c:979 [inline]
 SyS_exit_group+0x1d/0x20 kernel/exit.c:977
 entry_SYSCALL_64_fastpath+0x23/0x9a
RIP: 0033:0x444509
RSP: 002b:00007ffc1a9636b8 EFLAGS: 00000206 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000444509
RDX: 0000000000400eb0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 000000000000896d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000401e10 R14: 0000000000000000 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..