RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 R13: 00000000004d5508 R14: 00000000004c38bf R15: 0000000000000001 kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 16997 Comm: syz-executor1 Not tainted 4.19.0-rc4-next-20180920+ #76 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:reconfigure_super+0x48e/0xbb0 fs/super.c:981 Code: 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 62 05 00 00 48 ba 00 00 00 00 00 fc ff df 48 8b 03 48 8d 78 30 48 89 f9 48 c1 e9 03 <80> 3c 11 00 0f 85 4d 05 00 00 48 8b 40 30 48 85 c0 48 89 85 20 ff RSP: 0018:ffff88019b1678d8 EFLAGS: 00010206 RAX: 0000000000000000 RBX: ffff88019b1679f8 RCX: 0000000000000006 RDX: dffffc0000000000 RSI: ffffffff81cdb95b RDI: 0000000000000030 RBP: ffff88019b1679c8 R08: ffff8801c3cc8300 R09: fffffbfff12c24e5 R10: fffffbfff12c24e5 R11: ffffffff8961272b R12: ffff8801c87ae900 R13: 1ffff1003362cf20 R14: 0000000000000000 R15: ffff88019b167adc FS: 00007f09e8edf700(0000) GS:ffff8801dac00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001552fe8 CR3: 000000019afee000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: do_umount_root+0x2b1/0x320 fs/namespace.c:1434 do_umount fs/namespace.c:1504 [inline] ksys_umount+0x8b6/0x1230 fs/namespace.c:1620 __do_sys_umount fs/namespace.c:1631 [inline] __se_sys_umount fs/namespace.c:1629 [inline] __x64_sys_umount+0x54/0x80 fs/namespace.c:1629 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457679 Code: 1d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 eb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f09e8edec78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: ffffffffffffffda RBX: 00007f09e8edf6d4 RCX: 0000000000457679 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000040 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004d81a8 R14: 00000000004c4f0c R15: 0000000000000000 Modules linked in: kobject: 'loop3' (00000000495e82ed): kobject_uevent_env kobject: 'loop3' (00000000495e82ed): fill_kobj_path: path = '/devices/virtual/block/loop3' ---[ end trace a2dd03f4a76350e2 ]--- kobject: 'loop5' (0000000025184a25): kobject_uevent_env RIP: 0010:reconfigure_super+0x48e/0xbb0 fs/super.c:981 kobject: 'loop5' (0000000025184a25): fill_kobj_path: path = '/devices/virtual/block/loop5' FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 PID: 17018 Comm: syz-executor2 Tainted: G D 4.19.0-rc4-next-20180920+ #76 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1d3/0x2c4 lib/dump_stack.c:113 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0xa/0x17 lib/fault-inject.c:149 Code: 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 62 05 00 00 48 ba 00 00 00 00 00 fc ff df 48 8b 03 48 8d 78 30 48 89 f9 48 c1 e9 03 <80> 3c 11 00 0f 85 4d 05 00 00 48 8b 40 30 48 85 c0 48 89 85 20 ff RSP: 0018:ffff88019b1678d8 EFLAGS: 00010206 RAX: 0000000000000000 RBX: ffff88019b1679f8 RCX: 0000000000000006 RDX: dffffc0000000000 RSI: ffffffff81cdb95b RDI: 0000000000000030 __should_failslab+0x124/0x180 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1578 slab_pre_alloc_hook mm/slab.h:423 [inline] slab_alloc mm/slab.c:3378 [inline] kmem_cache_alloc_trace+0x2d7/0x750 mm/slab.c:3618 RBP: ffff88019b1679c8 R08: ffff8801c3cc8300 R09: fffffbfff12c24e5 kmalloc include/linux/slab.h:546 [inline] copy_mount_options+0x5f/0x430 fs/namespace.c:2835 R10: fffffbfff12c24e5 R11: ffffffff8961272b R12: ffff8801c87ae900 ksys_mount+0xd0/0x140 fs/namespace.c:3170 __do_sys_mount fs/namespace.c:3189 [inline] __se_sys_mount fs/namespace.c:3186 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3186 R13: 1ffff1003362cf20 R14: 0000000000000000 R15: ffff88019b167adc do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 FS: 00007f09e8edf700(0000) GS:ffff8801dac00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457679 Code: 1d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 eb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 CR2: 0000000000706158 CR3: 000000019afee000 CR4: 00000000001406f0 RSP: 002b:00007f65cacfac78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f65cacfb6d4 RCX: 0000000000457679 RDX: 000000002015bffc RSI: 00000000200000c0 RDI: 0000000020000680 RBP: 000000000072bf00 R08: 0000000020000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 R13: 00000000004d3b58 R14: 00000000004c297a R15: 0000000000000002 kobject: 'loop4' (000000008d38d42a): kobject_uevent_env DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 kobject: 'loop4' (000000008d38d42a): fill_kobj_path: path = '/devices/virtual/block/loop4' kasan: CONFIG_KASAN_INLINE enabled kobject: 'loop3' (00000000495e82ed): kobject_uevent_env kasan: GPF could be caused by NULL-ptr deref or user memory access kobject: 'loop3' (00000000495e82ed): fill_kobj_path: path = '/devices/virtual/block/loop3' general protection fault: 0000 [#2] PREEMPT SMP KASAN CPU: 0 PID: 17000 Comm: syz-executor1 Tainted: G D 4.19.0-rc4-next-20180920+ #76 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:reconfigure_super+0x48e/0xbb0 fs/super.c:981 Code: 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 62 05 00 00 48 ba 00 00 00 00 00 fc ff df 48 8b 03 48 8d 78 30 48 89 f9 48 c1 e9 03 <80> 3c 11 00 0f 85 4d 05 00 00 48 8b 40 30 48 85 c0 48 89 85 20 ff RSP: 0018:ffff88018a4ff8d8 EFLAGS: 00010206 kobject: 'loop0' (00000000cd3ea1c0): kobject_uevent_env RAX: 0000000000000000 RBX: ffff88018a4ff9f8 RCX: 0000000000000006 RDX: dffffc0000000000 RSI: ffffffff81cdb95b RDI: 0000000000000030 RBP: ffff88018a4ff9c8 R08: ffff8801879b42c0 R09: fffffbfff12c24e5 R10: fffffbfff12c24e5 R11: ffffffff8961272b R12: ffff88019b876c40 R13: 1ffff1003149ff20 R14: 0000000000000000 R15: ffff88018a4ffadc FS: 00007f09e8ebe700(0000) GS:ffff8801dac00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffde1cb9d08 CR3: 000000019afee000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: do_umount_root+0x2b1/0x320 fs/namespace.c:1434 kobject: 'loop0' (00000000cd3ea1c0): fill_kobj_path: path = '/devices/virtual/block/loop0' do_umount fs/namespace.c:1504 [inline] ksys_umount+0x8b6/0x1230 fs/namespace.c:1620