linux-kernel - WARNING in __alloc_pages

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Date:   Thu, 04 Jan 2018 05:57:01 -0800
From:   syzbot <syzbot+76e7efc4748495855a4d@...kaller.appspotmail.com>
To:     akpm@...ux-foundation.org, kemi.wang@...el.com,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org, mhocko@...e.com,
        mingo@...nel.org, n-horiguchi@...jp.nec.com, salls@...ucsb.edu,
        syzkaller-bugs@...glegroups.com, vbabka@...e.cz
Subject: WARNING in __alloc_pages_slowpath

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+76e7efc4748495855a4d@...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(1514727386.271:7): avc:  denied  { map } for   
pid=3485 comm="syzkaller426814" path="/root/syzkaller426814263" 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: 1 PID: 3485 at mm/page_alloc.c:3926  
__alloc_pages_slowpath+0x1ffc/0x2d00 mm/page_alloc.c:3936
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 3485 Comm: syzkaller426814 Not tainted 4.15.0-rc5+ #244
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:__alloc_pages_slowpath+0x1ffc/0x2d00 mm/page_alloc.c:3936
RSP: 0018:ffff8801c011f418 EFLAGS: 00010246
RAX: ffffed0038023ea4 RBX: 1ffff10038023ea4 RCX: 0000000000000000
RDX: ffff8801c011fa70 RSI: 0000000000000033 RDI: 0000000000000000
RBP: ffff8801c011f908 R08: 0000000000000000 R09: fffffffffff80f8a
R10: 0000000000000033 R11: 0000000000000033 R12: 0000000000000000
R13: ffff8801c011fad0 R14: 00000000014280c2 R15: ffff8801c011fa70
  __alloc_pages_nodemask+0x9fb/0xd80 mm/page_alloc.c:4252
  alloc_pages_current+0xb6/0x1e0 mm/mempolicy.c:2036
  alloc_pages include/linux/gfp.h:492 [inline]
  ion_system_contig_heap_allocate+0x40/0x2c0  
drivers/staging/android/ion/ion_system_heap.c:374
  ion_buffer_create drivers/staging/android/ion/ion.c:93 [inline]
  ion_alloc+0x2c1/0x9e0 drivers/staging/android/ion/ion.c:420
  ion_ioctl+0x26d/0x380 drivers/staging/android/ion/ion-ioctl.c:84
  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: 0033:0x43fcb9
RSP: 002b:00007ffd9858df78 EFLAGS: 00000203 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fcb9
RDX: 0000000020001eff RSI: 00000000c0184900 RDI: 0000000000000003
RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000203 R12: 0000000000401620
R13: 00000000004016b0 R14: 0000000000000000 R15: 0000000000000000
Dumping ftrace buffer:
    (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..


---
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