Message-ID: <001a11444d0e6d62800561a84805@google.com>
Date:   Sun, 31 Dec 2017 11:58:01 -0800
From:   syzbot <syzbot+6f11c7e2a1b91d466432@...kaller.appspotmail.com>
To:     alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
        mingo@...nel.org, o-takashi@...amocchi.jp, perex@...ex.cz,
        syzkaller-bugs@...glegroups.com, tiwai@...e.com
Subject: WARNING in snd_pcm_hw_param_first

Hello,

syzkaller hit the following crash on  
71ee203389f7cb1c1927eab22b95baa01405791c
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.
C reproducer is attached
syzkaller reproducer is attached. See https://goo.gl/kgGztJ
for information about syzkaller reproducers


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Reported-by: syzbot+6f11c7e2a1b91d466432@...kaller.appspotmail.com
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If you forward the report, please keep this part and the footer.

audit: type=1400 audit(1514740357.837:7): avc:  denied  { map } for   
pid=3502 comm="syzkaller781065" path="/root/syzkaller781065961" dev="sda1"  
ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023  
tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1
WARNING: CPU: 0 PID: 3502 at sound/core/pcm_lib.c:1635  
snd_pcm_hw_param_first+0x289/0x690 sound/core/pcm_lib.c:1635
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 3502 Comm: syzkaller781065 Not tainted 4.15.0-rc5+ #154
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_first+0x289/0x690 sound/core/pcm_lib.c:1635
RSP: 0018:ffff8801c013f1a0 EFLAGS: 00010293
RAX: ffff8801c03bc3c0 RBX: ffff8801bff08dc0 RCX: ffffffff841bee19
RDX: 0000000000000000 RSI: 00000000ffffffea RDI: ffffed0038027e28
RBP: ffff8801c013f1f0 R08: ffffed0038027d63 R09: ffff8801c013eb10
R10: 0000000000000001 R11: ffffed0038027d62 R12: 000000000000000d
R13: 00000000ffffffea R14: 0000000000000005 R15: 0000000000002000
  snd_pcm_hw_param_near.constprop.27+0x78d/0x9a0 sound/core/oss/pcm_oss.c:457
  snd_pcm_oss_change_params+0x17d3/0x3720 sound/core/oss/pcm_oss.c:969
  snd_pcm_oss_make_ready+0xaa/0x130 sound/core/oss/pcm_oss.c:1128
  snd_pcm_oss_sync+0x257/0x830 sound/core/oss/pcm_oss.c:1638
  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
  do_syscall_32_irqs_on arch/x86/entry/common.c:327 [inline]
  do_fast_syscall_32+0x3ee/0xf9d arch/x86/entry/common.c:389
  entry_SYSENTER_compat+0x54/0x63 arch/x86/entry/entry_64_compat.S:129
RIP: 0023:0xf7f4ec79
RSP: 002b:00000000ffc2c18c EFLAGS: 00000292 ORIG_RAX: 00000000000000fc
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000080f0298
RDX: 0000000000000000 RSI: 00000000080d9b78 RDI: 00000000080f02a0
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Dumping ftrace buffer:
    (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..


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