On 01/10/2018 03:18 AM, syzbot wrote:
Hello, syzkaller hit the following crash on 69eed2290e1d81b7a33774a24bbcb79f51958e57 git://git.cmpxchg.org/linux-mmots.git/master compiler: gcc (GCC) 7.1.1 20170620 .config is attached Raw console output is attached. Unfortunately, I don't have any reproducer for this bug yet. IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+1df9728298a8617bd419@xxxxxxxxxxxxxxxxxxxxxxxxx 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. ============================= 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..
#syz dup: WARNING in ion_ioctl _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
