Hello,
syzkaller hit the following crash on 30a7acd573899fd8b8ac39236eff6468b195ac7d git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/master compiler: gcc (GCC) 7.1.1 20170620 .config is attached Raw console output is attached. syzkaller reproducer is attached. See https://goo.gl/kgGztJ for information about syzkaller reproducers
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WARNING: CPU: 1 PID: 4856 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: 1 PID: 4856 Comm: syz-executor7 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: 0018:ffff8801d5e07498 EFLAGS: 00010293 RAX: ffff8801d5fe2080 RBX: ffff8801d5587200 RCX: ffffffff841bb75b RDX: 0000000000000000 RSI: 00000000ffffffea RDI: ffffed003abc0e88 RBP: ffff8801d5e074e0 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 000000000000000a R13: 00000000ffffffea R14: 0000000000000002 R15: 0000000000000400 snd_pcm_hw_param_near.constprop.27+0x6f5/0x9a0 sound/core/oss/pcm_oss.c:455 snd_pcm_oss_change_params+0xb3d/0x3720 sound/core/oss/pcm_oss.c:878 snd_pcm_oss_get_active_substream+0x10c/0x150 sound/core/oss/pcm_oss.c:1088 snd_pcm_oss_get_channels sound/core/oss/pcm_oss.c:1708 [inline] snd_pcm_oss_set_channels+0x23e/0x3a0 sound/core/oss/pcm_oss.c:1700 snd_pcm_oss_ioctl+0x1dcc/0x39f0 sound/core/oss/pcm_oss.c:2514 vfs_ioctl fs/ioctl.c:46 [inline] do_vfs_ioctl+0x1b1/0x1520 fs/ioctl.c:686 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692 entry_SYSCALL_64_fastpath+0x23/0x9a RIP: 0033:0x452ac9 RSP: 002b:00007fa5a61bec58 EFLAGS: 00000212 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452ac9 RDX: 0000000020004ff8 RSI: 00800000c0045006 RDI: 0000000000000003 RBP: 00000000000000ef R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006ef708 R13: 00000000ffffffff R14: 00007fa5a61bf6d4 R15: 0000000000000002 Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..
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