audit: type=1400 audit(1601262145.215:8): avc: denied { execmem } for pid=6340 comm="syz-executor754" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' ------------[ cut here ]------------ sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' WARNING: CPU: 0 PID: 6350 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x2d fs/sysfs/dir.c:30 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 6350 Comm: syz-executor754 Not tainted 4.14.198-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: ------------[ cut here ]------------ __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x283 lib/dump_stack.c:58 WARNING: CPU: 1 PID: 6349 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x2d fs/sysfs/dir.c:30 panic+0x1f9/0x42d kernel/panic.c:183 Modules linked in: CPU: 1 PID: 6349 Comm: syz-executor754 Not tainted 4.14.198-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8880975c6340 task.stack: ffff8880982f8000 RIP: 0010:sysfs_warn_dup.cold+0x17/0x2d fs/sysfs/dir.c:30 __warn.cold+0x20/0x4b kernel/panic.c:547 RSP: 0018:ffff8880982ff728 EFLAGS: 00010282 RAX: 000000000000003a RBX: ffff888099f00710 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff86ac12c0 RDI: ffffed101305fedb report_bug+0x208/0x249 lib/bug.c:186 RBP: ffff888087040680 R08: 000000000000003a R09: 0000000000000001 fixup_bug arch/x86/kernel/traps.c:177 [inline] fixup_bug arch/x86/kernel/traps.c:172 [inline] do_error_trap+0x195/0x2d0 arch/x86/kernel/traps.c:295 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a5eff1c0 R13: ffff8880a11a5a80 R14: ffff888099f00730 R15: ffff88808d5c8698 FS: 0000000000798880(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffe686a7d00 CR3: 00000000a3a71000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:964 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: RIP: 0010:sysfs_warn_dup.cold+0x17/0x2d fs/sysfs/dir.c:30 sysfs_create_dir_ns+0x16f/0x1d0 fs/sysfs/dir.c:59 RSP: 0018:ffff88808c9bf728 EFLAGS: 00010282 create_dir lib/kobject.c:71 [inline] kobject_add_internal+0x279/0x810 lib/kobject.c:229 kobject_add_varg lib/kobject.c:364 [inline] kobject_init_and_add+0xde/0x120 lib/kobject.c:436 RAX: 000000000000003a RBX: ffff88808d5c8690 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff86ac12c0 RDI: ffffed1011937edb RBP: ffff888084732200 R08: 000000000000003a R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a5eff1c0 gfs2_sys_fs_add+0x184/0x3f0 fs/gfs2/sys.c:652 R13: ffff888098242f00 R14: ffff88808d5c86b0 R15: ffff888098734658 sysfs_create_dir_ns+0x16f/0x1d0 fs/sysfs/dir.c:59 create_dir lib/kobject.c:71 [inline] kobject_add_internal+0x279/0x810 lib/kobject.c:229 kobject_add_varg lib/kobject.c:364 [inline] kobject_init_and_add+0xde/0x120 lib/kobject.c:436 fill_super+0x118b/0x2310 fs/gfs2/ops_fstype.c:1118 gfs2_sys_fs_add+0x184/0x3f0 fs/gfs2/sys.c:652 fill_super+0x118b/0x2310 fs/gfs2/ops_fstype.c:1118 gfs2_mount+0x439/0x502 fs/gfs2/ops_fstype.c:1331 mount_fs+0x92/0x2a0 fs/super.c:1237 vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046 vfs_kern_mount fs/namespace.c:1036 [inline] do_new_mount fs/namespace.c:2549 [inline] do_mount+0xe53/0x2a00 fs/namespace.c:2879 gfs2_mount+0x439/0x502 fs/gfs2/ops_fstype.c:1331 mount_fs+0x92/0x2a0 fs/super.c:1237 vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046 SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xa8/0x120 fs/namespace.c:3072 vfs_kern_mount fs/namespace.c:1036 [inline] do_new_mount fs/namespace.c:2549 [inline] do_mount+0xe53/0x2a00 fs/namespace.c:2879 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x45c4da RSP: 002b:00007ffd8abb8588 EFLAGS: 00000293 ORIG_RAX: 00000000000000a5 SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xa8/0x120 fs/namespace.c:3072 RAX: ffffffffffffffda RBX: 00007ffd8abb85e0 RCX: 000000000045c4da RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffd8abb85a0 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 RBP: 00007ffd8abb85a0 R08: 00007ffd8abb85e0 R09: 0000000000000000 entry_SYSCALL_64_after_hwframe+0x46/0xbb R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000918 RIP: 0033:0x45c4da R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003 Code: RSP: 002b:00007ffd8abb8588 EFLAGS: 00000293 56 ORIG_RAX: 00000000000000a5 61 RAX: ffffffffffffffda RBX: 00007ffd8abb85e0 RCX: 000000000045c4da 8a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffd8abb85a0 RBP: 00007ffd8abb85a0 R08: 00007ffd8abb85e0 R09: 0000000000000000 e8 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000918 59 R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003 41 db ff eb d8 e8 52 41 db ff e9 6d ff ff ff e8 08 6e b1 ff 4c 89 ea 48 89 ee 48 c7 c7 a0 9d b5 86 e8 57 0d a0 ff <0f> 0b 48 89 ef 5d 41 5c 41 5d e9 67 16 db ff 90 90 90 90 90 90 ---[ end trace cd6903d6b6889fc6 ]--- Kernel Offset: disabled Rebooting in 86400 seconds..