Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.100' (ECDSA) to the list of known hosts. syzkaller login: [ 31.468409] audit: type=1400 audit(1601223562.544:8): avc: denied { execmem } for pid=6383 comm="syz-executor337" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 31.529210] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 31.536765] gfs2: fsid=syz:syz: Now mounting FS... [ 31.542953] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 31.547645] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 31.553593] ------------[ cut here ]------------ [ 31.558441] ------------[ cut here ]------------ [ 31.561147] WARNING: CPU: 0 PID: 6390 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x2d [ 31.565885] WARNING: CPU: 1 PID: 6394 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x2d [ 31.574083] Kernel panic - not syncing: panic_on_warn set ... [ 31.574083] [ 31.582286] Modules linked in: [ 31.589639] CPU: 0 PID: 6390 Comm: syz-executor337 Not tainted 4.14.198-syzkaller #0 [ 31.589648] CPU: 1 PID: 6394 Comm: syz-executor337 Not tainted 4.14.198-syzkaller #0 [ 31.592821] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.600680] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.608531] Call Trace: [ 31.617862] task: ffff8880982be0c0 task.stack: ffff88808b4e8000 [ 31.627212] dump_stack+0x1b2/0x283 [ 31.629782] RIP: 0010:sysfs_warn_dup.cold+0x17/0x2d [ 31.635818] panic+0x1f9/0x42d [ 31.639423] RSP: 0018:ffff88808b4ef728 EFLAGS: 00010282 [ 31.644423] ? add_taint.cold+0x16/0x16 [ 31.647585] RAX: 000000000000003a RBX: ffff8880968b0990 RCX: 0000000000000000 [ 31.647591] RDX: 0000000000000000 RSI: ffffffff86ac12c0 RDI: ffffed101169dedb [ 31.652935] ? sysfs_warn_dup.cold+0x17/0x2d [ 31.656879] RBP: ffff888085882740 R08: 000000000000003a R09: 0000000000000000 [ 31.664125] ? sysfs_warn_dup.cold+0x17/0x2d [ 31.671365] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88821954f0e0 [ 31.675745] __warn.cold+0x20/0x4b [ 31.682988] R13: ffff888092505e40 R14: ffff8880968b09b0 R15: ffff8880968d08d8 [ 31.687370] ? ist_end_non_atomic+0x10/0x10 [ 31.694624] FS: 0000000002465880(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000 [ 31.698150] ? sysfs_warn_dup.cold+0x17/0x2d [ 31.705400] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 31.705406] CR2: 00007f3c35f98000 CR3: 00000000a783c000 CR4: 00000000001406e0 [ 31.709703] report_bug+0x208/0x249 [ 31.717908] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 31.722302] do_error_trap+0x195/0x2d0 [ 31.728153] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 31.735407] ? math_error+0x2d0/0x2d0 [ 31.739014] Call Trace: [ 31.746272] ? ___preempt_schedule+0x16/0x18 [ 31.750132] sysfs_create_dir_ns+0x16f/0x1d0 [ 31.757383] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.761163] kobject_add_internal+0x279/0x810 [ 31.763722] invalid_op+0x1b/0x40 [ 31.768106] kobject_init_and_add+0xde/0x120 [ 31.772484] RIP: 0010:sysfs_warn_dup.cold+0x17/0x2d [ 31.777307] ? kobject_create_and_add+0x200/0x200 [ 31.781791] RSP: 0018:ffff8880976df728 EFLAGS: 00010282 [ 31.785220] ? vsnprintf+0x260/0x1340 [ 31.794587] gfs2_sys_fs_add+0x184/0x3f0 [ 31.799391] RAX: 000000000000003a RBX: ffff8880968d08d0 RCX: 0000000000000000 [ 31.799397] RDX: 0000000000000000 RSI: ffffffff86ac12c0 RDI: ffffed1012edbedb [ 31.804743] ? recover_store+0x100/0x100 [ 31.808511] RBP: ffff888096e62a80 R08: 000000000000003a R09: 0000000000000000 [ 31.812546] ? snprintf+0xa5/0xd0 [ 31.819791] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88821954f0e0 [ 31.827055] ? memcpy+0x35/0x50 [ 31.831081] R13: ffff8880a517e7c0 R14: ffff8880968d08f0 R15: ffff888087f28898 [ 31.838343] fill_super+0x118b/0x2310 [ 31.841777] ? sysfs_warn_dup.cold+0x17/0x2d [ 31.849019] ? vsnprintf+0x260/0x1340 [ 31.852267] sysfs_create_dir_ns+0x16f/0x1d0 [ 31.859515] ? gfs2_online_uevent+0x1b0/0x1b0 [ 31.863287] kobject_add_internal+0x279/0x810 [ 31.867679] ? pointer+0x9e0/0x9e0 [ 31.871467] kobject_init_and_add+0xde/0x120 [ 31.875847] ? snprintf+0xa5/0xd0 [ 31.880313] ? kobject_create_and_add+0x200/0x200 [ 31.884785] ? vsprintf+0x30/0x30 [ 31.888300] ? vsnprintf+0x260/0x1340 [ 31.892681] ? gfs2_open+0x160/0x160 [ 31.896112] gfs2_sys_fs_add+0x184/0x3f0 [ 31.900924] ? set_blocksize+0x125/0x380 [ 31.904364] ? recover_store+0x100/0x100 [ 31.908247] gfs2_mount+0x439/0x502 [ 31.911929] ? snprintf+0xa5/0xd0 [ 31.915962] ? fill_super+0x2310/0x2310 [ 31.919999] ? memcpy+0x35/0x50 [ 31.924045] mount_fs+0x92/0x2a0 [ 31.927631] fill_super+0x118b/0x2310 [ 31.931062] vfs_kern_mount.part.0+0x5b/0x470 [ 31.935015] ? vsnprintf+0x260/0x1340 [ 31.938270] do_mount+0xe53/0x2a00 [ 31.941697] ? gfs2_online_uevent+0x1b0/0x1b0 [ 31.945471] ? retint_kernel+0x2d/0x2d [ 31.949937] ? pointer+0x9e0/0x9e0 [ 31.953710] ? copy_mount_string+0x40/0x40 [ 31.957235] ? snprintf+0xa5/0xd0 [ 31.961703] ? memset+0x20/0x40 [ 31.965562] ? vsprintf+0x30/0x30 [ 31.969071] ? copy_mount_options+0x1fa/0x2f0 [ 31.973277] ? gfs2_open+0x160/0x160 [ 31.976712] ? copy_mnt_ns+0xa30/0xa30 [ 31.979962] ? set_blocksize+0x125/0x380 [ 31.984445] SyS_mount+0xa8/0x120 [ 31.988916] gfs2_mount+0x439/0x502 [ 31.992611] ? copy_mnt_ns+0xa30/0xa30 [ 31.996472] ? fill_super+0x2310/0x2310 [ 32.000516] do_syscall_64+0x1d5/0x640 [ 32.003961] mount_fs+0x92/0x2a0 [ 32.007548] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 32.011426] vfs_kern_mount.part.0+0x5b/0x470 [ 32.015371] RIP: 0033:0x45c4fa [ 32.019243] do_mount+0xe53/0x2a00 [ 32.022586] RSP: 002b:00007ffce0e92588 EFLAGS: 00000293 [ 32.027766] ? retint_kernel+0x2d/0x2d [ 32.032227] ORIG_RAX: 00000000000000a5 [ 32.035398] ? copy_mount_string+0x40/0x40 [ 32.038910] RAX: ffffffffffffffda RBX: 00007ffce0e925e0 RCX: 000000000045c4fa [ 32.044260] ? memset+0x20/0x40 [ 32.048137] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffce0e925a0 [ 32.052099] ? copy_mount_options+0x1fa/0x2f0 [ 32.056299] RBP: 00007ffce0e925a0 R08: 00007ffce0e925e0 R09: 0000000000000000 [ 32.063550] ? copy_mnt_ns+0xa30/0xa30 [ 32.066807] R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000919 [ 32.074056] SyS_mount+0xa8/0x120 [ 32.078532] R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003 [ 32.085779] ? copy_mnt_ns+0xa30/0xa30 [ 32.089655] Code: [ 32.096901] do_syscall_64+0x1d5/0x640 [ 32.100322] 56 [ 32.107585] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 32.107592] RIP: 0033:0x45c4fa [ 32.107598] RSP: 002b:00007ffce0e92588 EFLAGS: 00000293 [ 32.111475] 61 [ 32.113599] ORIG_RAX: 00000000000000a5 [ 32.117467] 8a [ 32.119331] RAX: ffffffffffffffda RBX: 00007ffce0e925e0 RCX: 000000000045c4fa [ 32.124487] e8 [ 32.127655] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffce0e925a0 [ 32.132987] 59 [ 32.134861] RBP: 00007ffce0e925a0 R08: 00007ffce0e925e0 R09: 0000000000000000 [ 32.138805] 41 [ 32.140669] R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000919 [ 32.147912] db [ 32.149791] R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003 [ 32.157034] 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 [ 32.201182] ---[ end trace a6519dccc2dd0630 ]--- [ 32.207238] Kernel Offset: disabled [ 32.210916] Rebooting in 86400 seconds..