=============================
WARNING: suspicious RCU usage
4.15.0-rc6-mm1+ #52 Not tainted
WARNING: CPU: 1 PID: 4388 at drivers/staging/android/ion/ion-ioctl.c:63 ion_ioctl+0x2db/0x380 drivers/staging/android/ion/ion-ioctl.c:63
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 4388 Comm: syz-executor1 Not tainted 4.15.0-rc6-mm1+ #52
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:63
RSP: 0018:ffff8801cf60fce0 EFLAGS: 00010212
RAX: 0000000000010000 RBX: 0000000000000018 RCX: ffffffff841563eb
RDX: 000000000000006f RSI: ffffc90002d23000 RDI: ffff8801cf60fd14
RBP: ffff8801cf60fd78 R08: d7987b3bb57b3c72 R09: ffffed0039ec1fa5
R10: 0000000000000003 R11: ffffed0039ec1fa4 R12: 1ffff10039ec1f9e
R13: 00000000c0184908 R14: ffff8801cf60fd50 R15: dffffc0000000000
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:00007fd877792c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000452ac9
RDX: 0000000020003000 RSI: 00000000c0184908 RDI: 0000000000000013
RBP: 00000000000003aa R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f3890
R13: 00000000ffffffff R14: 00007fd8777936d4 R15: 0000000000000000
Dumping ftrace buffer:
(ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..