linux-kernel - WARNING in ion

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Message-ID: <f403043cd4eccf5d8b0561f3b42f@google.com>
Date:   Thu, 04 Jan 2018 05:57:01 -0800
From:   syzbot <syzbot+fa2d5f63ee5904a0115a@...kaller.appspotmail.com>
To:     arve@...roid.com, devel@...verdev.osuosl.org,
        gregkh@...uxfoundation.org, labbott@...hat.com,
        linux-kernel@...r.kernel.org, maco@...roid.com,
        sumit.semwal@...aro.org, syzkaller-bugs@...glegroups.com,
        tkjos@...roid.com
Subject: WARNING in ion_ioctl

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


IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+fa2d5f63ee5904a0115a@...kaller.appspotmail.com
It will help syzbot understand when the bug is fixed. See footer for  
details.
If you forward the report, please keep this part and the footer.

audit: type=1400 audit(1514734723.062:7): avc:  denied  { map } for   
pid=3502 comm="syzkaller809746" path="/root/syzkaller809746698" 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 drivers/staging/android/ion/ion-ioctl.c:73  
ion_ioctl+0x2db/0x380 drivers/staging/android/ion/ion-ioctl.c:73
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 3502 Comm: syzkaller809746 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:ion_ioctl+0x2db/0x380 drivers/staging/android/ion/ion-ioctl.c:73
RSP: 0018:ffff8801bfce7ca8 EFLAGS: 00010293
RAX: ffff8801bfea00c0 RBX: 0000000000000018 RCX: ffffffff8410f0fb
RDX: 0000000000000000 RSI: 0000000020002018 RDI: ffff8801bfce7cdc
RBP: ffff8801bfce7d40 R08: 0000000000000000 R09: ffffed0037f9cf9e
R10: 0000000000000003 R11: ffffed0037f9cf9d R12: 1ffff10037f9cf97
R13: 00000000c0184908 R14: ffff8801bfce7d18 R15: dffffc0000000000
  C_SYSC_ioctl fs/compat_ioctl.c:1473 [inline]
  compat_SyS_ioctl+0x151/0x2a30 fs/compat_ioctl.c:1419
  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: 0023:0xf7f92c79
RSP: 002b:00000000ffe832ec EFLAGS: 00000213 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000c0184908
RDX: 0000000020002000 RSI: 00000000000000b6 RDI: 0000000020002000
RBP: 0000000000000000 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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