[ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.181' (ECDSA) to the list of known hosts. syzkaller login: [ 32.024214] audit: type=1400 audit(1601526123.612:8): avc: denied { execmem } for pid=6348 comm="syz-executor662" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 32.081222] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 32.092174] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 32.094889] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 32.099308] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 32.107693] ------------[ cut here ]------------ [ 32.117027] WARNING: CPU: 0 PID: 6360 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x2d [ 32.124642] ------------[ cut here ]------------ [ 32.125245] Kernel panic - not syncing: panic_on_warn set ... [ 32.125245] [ 32.129991] WARNING: CPU: 1 PID: 6356 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x2d [ 32.137318] CPU: 0 PID: 6360 Comm: syz-executor662 Not tainted 4.14.198-syzkaller #0 [ 32.145514] Modules linked in: [ 32.153370] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 32.156539] Call Trace: [ 32.165872] CPU: 1 PID: 6356 Comm: syz-executor662 Not tainted 4.14.198-syzkaller #0 [ 32.168434] dump_stack+0x1b2/0x283 [ 32.176284] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 32.179890] panic+0x1f9/0x42d [ 32.189215] task: ffff8880875d6280 task.stack: ffff888097aa0000 [ 32.192382] ? add_taint.cold+0x16/0x16 [ 32.198412] RIP: 0010:sysfs_warn_dup.cold+0x17/0x2d [ 32.202359] ? sysfs_warn_dup.cold+0x17/0x2d [ 32.207346] RSP: 0018:ffff888097aa7728 EFLAGS: 00010282 [ 32.211731] ? sysfs_warn_dup.cold+0x17/0x2d [ 32.217064] RAX: 000000000000003a RBX: ffff8880979186d0 RCX: 0000000000000000 [ 32.221448] __warn.cold+0x20/0x4b [ 32.228707] RDX: 0000000000000000 RSI: ffffffff86ac12c0 RDI: ffffed1012f54edb [ 32.232307] ? ist_end_non_atomic+0x10/0x10 [ 32.239566] RBP: ffff888099f4e740 R08: 000000000000003a R09: 0000000000000000 [ 32.243901] ? sysfs_warn_dup.cold+0x17/0x2d [ 32.251143] R10: 0000000000000000 R11: 0000000000000000 R12: ffff888219193c40 [ 32.255525] report_bug+0x208/0x249 [ 32.262767] R13: ffff8880a10f7400 R14: ffff8880979186f0 R15: ffff88809c034698 [ 32.262774] FS: 0000000001d78880(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000 [ 32.266376] do_error_trap+0x195/0x2d0 [ 32.273617] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 32.281823] ? math_error+0x2d0/0x2d0 [ 32.285701] CR2: 00007fffc2345ff8 CR3: 000000009e7f4000 CR4: 00000000001406e0 [ 32.291560] ? ___preempt_schedule+0x16/0x18 [ 32.295328] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 32.302577] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 32.306951] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 32.314199] invalid_op+0x1b/0x40 [ 32.319004] Call Trace: [ 32.326252] RIP: 0010:sysfs_warn_dup.cold+0x17/0x2d [ 32.329681] sysfs_create_dir_ns+0x16f/0x1d0 [ 32.332237] RSP: 0018:ffff8880978ef728 EFLAGS: 00010282 [ 32.337357] kobject_add_internal+0x279/0x810 [ 32.341735] RAX: 000000000000003a RBX: ffff888090664750 RCX: 0000000000000000 [ 32.347075] kobject_init_and_add+0xde/0x120 [ 32.351536] RDX: 0000000000000000 RSI: ffffffff86ac12c0 RDI: ffffed1012f1dedb [ 32.358785] ? kobject_create_and_add+0x200/0x200 [ 32.363161] RBP: ffff88809e248840 R08: 000000000000003a R09: 0000000000000000 [ 32.370409] ? vsnprintf+0x260/0x1340 [ 32.375219] R10: 0000000000000000 R11: 0000000000000000 R12: ffff888219193c40 [ 32.382472] gfs2_sys_fs_add+0x184/0x3f0 [ 32.386238] R13: ffff88809b3b6b00 R14: ffff888090664770 R15: ffff8880979186d8 [ 32.393486] ? recover_store+0x100/0x100 [ 32.397528] ? sysfs_warn_dup.cold+0x17/0x2d [ 32.404771] ? snprintf+0xa5/0xd0 [ 32.408804] sysfs_create_dir_ns+0x16f/0x1d0 [ 32.413191] ? memcpy+0x35/0x50 [ 32.416614] kobject_add_internal+0x279/0x810 [ 32.421013] fill_super+0x118b/0x2310 [ 32.424270] kobject_init_and_add+0xde/0x120 [ 32.428740] ? vsnprintf+0x260/0x1340 [ 32.432515] ? kobject_create_and_add+0x200/0x200 [ 32.436897] ? gfs2_online_uevent+0x1b0/0x1b0 [ 32.440671] ? vsnprintf+0x260/0x1340 [ 32.445486] ? pointer+0x9e0/0x9e0 [ 32.449960] gfs2_sys_fs_add+0x184/0x3f0 [ 32.453732] ? snprintf+0xa5/0xd0 [ 32.457244] ? recover_store+0x100/0x100 [ 32.461280] ? vsprintf+0x30/0x30 [ 32.464743] ? snprintf+0xa5/0xd0 [ 32.468782] ? gfs2_open+0x160/0x160 [ 32.472221] ? memcpy+0x35/0x50 [ 32.475649] ? set_blocksize+0x125/0x380 [ 32.479338] fill_super+0x118b/0x2310 [ 32.482592] gfs2_mount+0x439/0x502 [ 32.486631] ? vsnprintf+0x260/0x1340 [ 32.490418] ? fill_super+0x2310/0x2310 [ 32.494022] ? gfs2_online_uevent+0x1b0/0x1b0 [ 32.497817] mount_fs+0x92/0x2a0 [ 32.501752] ? pointer+0x9e0/0x9e0 [ 32.506240] vfs_kern_mount.part.0+0x5b/0x470 [ 32.509579] ? snprintf+0xa5/0xd0 [ 32.513092] do_mount+0xe53/0x2a00 [ 32.517558] ? vsprintf+0x30/0x30 [ 32.520987] ? retint_kernel+0x2d/0x2d [ 32.524515] ? gfs2_open+0x160/0x160 [ 32.527945] ? copy_mount_string+0x40/0x40 [ 32.531805] ? set_blocksize+0x125/0x380 [ 32.535494] ? memset+0x20/0x40 [ 32.539702] gfs2_mount+0x439/0x502 [ 32.543748] ? copy_mount_options+0x1fa/0x2f0 [ 32.547012] ? fill_super+0x2310/0x2310 [ 32.550612] ? copy_mnt_ns+0xa30/0xa30 [ 32.555457] mount_fs+0x92/0x2a0 [ 32.559397] SyS_mount+0xa8/0x120 [ 32.563259] vfs_kern_mount.part.0+0x5b/0x470 [ 32.566722] ? copy_mnt_ns+0xa30/0xa30 [ 32.570151] do_mount+0xe53/0x2a00 [ 32.574623] do_syscall_64+0x1d5/0x640 [ 32.578564] ? retint_kernel+0x2d/0x2d [ 32.582084] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 32.585946] ? copy_mount_string+0x40/0x40 [ 32.589823] RIP: 0033:0x45c57a [ 32.594992] ? memset+0x20/0x40 [ 32.599193] RSP: 002b:00007ffca3ac11a8 EFLAGS: 00000293 [ 32.602364] ? copy_mount_options+0x1fa/0x2f0 [ 32.605637] ORIG_RAX: 00000000000000a5 [ 32.610979] ? copy_mnt_ns+0xa30/0xa30 [ 32.615465] RAX: ffffffffffffffda RBX: 00007ffca3ac1200 RCX: 000000000045c57a [ 32.619413] SyS_mount+0xa8/0x120 [ 32.623270] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffca3ac11c0 [ 32.630517] ? copy_mnt_ns+0xa30/0xa30 [ 32.633952] RBP: 00007ffca3ac11c0 R08: 00007ffca3ac1200 R09: 0000000000000000 [ 32.641213] do_syscall_64+0x1d5/0x640 [ 32.645068] R10: 0000000000000000 R11: 0000000000000293 R12: 000000000000091c [ 32.652321] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 32.656177] R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003 [ 32.663425] RIP: 0033:0x45c57a [ 32.668592] Code: [ 32.675836] RSP: 002b:00007ffca3ac11a8 EFLAGS: 00000293 [ 32.679000] 56 [ 32.681140] ORIG_RAX: 00000000000000a5 [ 32.686473] 61 [ 32.688337] RAX: ffffffffffffffda RBX: 00007ffca3ac1200 RCX: 000000000045c57a [ 32.692279] 8a [ 32.694143] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffca3ac11c0 [ 32.701385] e8 [ 32.703267] RBP: 00007ffca3ac11c0 R08: 00007ffca3ac1200 R09: 0000000000000000 [ 32.710507] 59 [ 32.712395] R10: 0000000000000000 R11: 0000000000000293 R12: 000000000000091c [ 32.719636] 41 [ 32.721503] R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003 [ 32.728745] 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 [ 32.754907] ---[ end trace 2b84ddc123b9dfd0 ]--- [ 32.760842] Kernel Offset: disabled [ 32.764499] Rebooting in 86400 seconds..