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: 1 PID: 10868 Comm: syz-executor.3 Not tainted 5.3.0-rc4-next-20190814 #66 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:map_id_range_down+0x87/0x370 kernel/user_namespace.c:293 Code: 6e 81 c7 00 f1 f1 f1 f1 c7 40 04 00 04 f3 f3 65 48 8b 04 25 28 00 00 00 48 89 45 d0 31 c0 e8 a0 a5 03 00 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 74 08 3c 03 0f 8e 9f 02 00 00 4c 8b ad 68 ff RSP: 0018:ffff88805be97a30 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff88805be97aa8 RCX: ffffc9000cd10000 RDX: 000000000001161f RSI: ffffffff816e8ab0 RDI: 0000000000000000 RBP: ffff88805be97ad0 R08: ffff88809af2a040 R09: ffffed101380e3db R10: ffffed101380e3da R11: 0000000000000003 R12: 0000000000000001 R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f3193d40700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000738008 CR3: 0000000097eff000 CR4: 00000000001406e0 DR0: 0000000000002e00 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: map_id_down kernel/user_namespace.c:312 [inline] make_kuid+0x23/0x30 kernel/user_namespace.c:389 fuse_parse_param+0x2cb/0x750 fs/fuse/inode.c:523 vfs_parse_fs_param+0x2ca/0x540 fs/fs_context.c:145 vfs_parse_fs_string+0x105/0x170 fs/fs_context.c:188 generic_parse_monolithic+0x181/0x200 fs/fs_context.c:228 parse_monolithic_mount_data+0x69/0x90 fs/fs_context.c:708 do_remount fs/namespace.c:2520 [inline] do_mount+0x924/0x1c30 fs/namespace.c:3102 ksys_mount+0xdb/0x150 fs/namespace.c:3320 __do_sys_mount fs/namespace.c:3334 [inline] __se_sys_mount fs/namespace.c:3331 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3331 do_syscall_64+0xfa/0x760 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459829 Code: fd b7 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 b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f3193d3fc78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000459829 RDX: 00000000200000c0 RSI: 0000000020000040 RDI: 0000000000000000 RBP: 000000000075bf20 R08: 0000000020000500 R09: 0000000000000000 R10: 0000000000000020 R11: 0000000000000246 R12: 00007f3193d406d4 R13: 00000000004c5e2b R14: 00000000004da938 R15: 00000000ffffffff Modules linked in: ---[ end trace c9f4b2a1310c1cee ]--- RIP: 0010:map_id_range_down+0x87/0x370 kernel/user_namespace.c:293 Code: 6e 81 c7 00 f1 f1 f1 f1 c7 40 04 00 04 f3 f3 65 48 8b 04 25 28 00 00 00 48 89 45 d0 31 c0 e8 a0 a5 03 00 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 74 08 3c 03 0f 8e 9f 02 00 00 4c 8b ad 68 ff RSP: 0018:ffff88805be97a30 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff88805be97aa8 RCX: ffffc9000cd10000 RDX: 000000000001161f RSI: ffffffff816e8ab0 RDI: 0000000000000000 RBP: ffff88805be97ad0 R08: ffff88809af2a040 R09: ffffed101380e3db R10: ffffed101380e3da R11: 0000000000000003 R12: 0000000000000001 R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f3193d40700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3193cbbdb8 CR3: 0000000097eff000 CR4: 00000000001406f0