kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] SMP KASAN CPU: 0 PID: 9280 Comm: syz-executor0 Not tainted 4.18.0-rc7-next-20180801+ #29 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:do_remount_sb+0x371/0x850 fs/super.c:984 Code: ff ff ff e8 e1 f8 19 05 41 89 c5 48 8b 85 30 ff ff ff 48 8d b8 e0 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e b5 03 00 00 48 8b 85 30 ff ff RSP: 0018:ffff8801907cfa38 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff880198ab0640 RCX: ffffc90012898000 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 RDX: 000000000000001c RSI: ffffffff81eeb49f RDI: 00000000000000e0 RBP: ffff8801907cfb40 R08: ffff8801d50800c0 R09: fffffbfff0fc24e5 R10: fffffbfff0fc24e5 R11: ffffffff87e1272b R12: ffff8801907cfb18 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000 FS: 00007fb89e42e700(0000) GS:ffff8801db000000(0000) knlGS:0000000000000000 CPU: 1 PID: 9290 Comm: syz-executor6 Not tainted 4.18.0-rc7-next-20180801+ #29 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: CR2: 00007f40bbb3e000 CR3: 00000001d7a07000 CR4: 00000000001406f0 __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113 DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0xa/0x11 lib/fault-inject.c:149 do_umount fs/namespace.c:1464 [inline] ksys_umount+0xfbf/0x1310 fs/namespace.c:1582 __should_failslab+0x124/0x180 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1557 slab_pre_alloc_hook mm/slab.h:423 [inline] slab_alloc mm/slab.c:3378 [inline] __do_kmalloc mm/slab.c:3716 [inline] __kmalloc_track_caller+0x2c4/0x760 mm/slab.c:3733 kstrdup+0x39/0x70 mm/util.c:56 parse_opts+0x176/0x500 net/9p/trans_fd.c:755 __do_sys_umount fs/namespace.c:1593 [inline] __se_sys_umount fs/namespace.c:1591 [inline] __x64_sys_umount+0x54/0x80 fs/namespace.c:1591 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 p9_fd_create+0x8b/0x3f0 net/9p/trans_fd.c:1035 p9_client_create+0x813/0x1587 net/9p/client.c:1051 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x456a09 Code: fd 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 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fb89e42dc78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: ffffffffffffffda RBX: 00007fb89e42e6d4 RCX: 0000000000456a09 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000040 RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000 v9fs_session_init+0x21a/0x1a80 fs/9p/v9fs.c:400 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004d5c20 R14: 00000000004c936b R15: 0000000000000000 Modules linked in: Dumping ftrace buffer: (ftrace buffer empty) ---[ end trace 43fed9c566012652 ]--- RIP: 0010:do_remount_sb+0x371/0x850 fs/super.c:984 v9fs_mount+0x7c/0x900 fs/9p/vfs_super.c:135 Code: ff ff ff e8 e1 f8 19 05 41 89 c5 48 8b 85 30 ff ff ff 48 8d b8 e0 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e b5 03 00 00 48 8b 85 30 ff ff legacy_get_tree+0x131/0x460 fs/fs_context.c:729 vfs_get_tree+0x1cb/0x5c0 fs/super.c:1743 RSP: 0018:ffff8801907cfa38 EFLAGS: 00010202 do_new_mount fs/namespace.c:2603 [inline] do_mount+0x6f2/0x1e20 fs/namespace.c:2927 RAX: dffffc0000000000 RBX: ffff880198ab0640 RCX: ffffc90012898000 RDX: 000000000000001c RSI: ffffffff81eeb49f RDI: 00000000000000e0 ksys_mount+0x12d/0x140 fs/namespace.c:3143 __do_sys_mount fs/namespace.c:3157 [inline] __se_sys_mount fs/namespace.c:3154 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3154 RBP: ffff8801907cfb40 R08: ffff8801d50800c0 R09: fffffbfff0fc24e5 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 R10: fffffbfff0fc24e5 R11: ffffffff87e1272b R12: ffff8801907cfb18 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000 FS: 00007fb89e42e700(0000) GS:ffff8801db000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 entry_SYSCALL_64_after_hwframe+0x49/0xbe CR2: 00007f40bbb3e000 CR3: 00000001d7a07000 CR4: 00000000001406f0 RIP: 0033:0x456a09 Code: fd 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 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f5e037c3c78 EFLAGS: 00000246 DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f5e037c46d4 RCX: 0000000000456a09 RDX: 0000000020000180 RSI: 0000000020000000 RDI: 0000000000000000 RBP: 00000000009300a0 R08: 0000000020001940 R09: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000015 R13: 00000000004d1750 R14: 00000000004c6e7f R15: 0000000000000013 9pnet: Insufficient options for proto=fd