Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.156' (ECDSA) to the list of known hosts. syzkaller login: [ 28.606445] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 28.616880] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 28.635917] ------------[ cut here ]------------ [ 28.640692] WARNING: CPU: 1 PID: 7994 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x26 [ 28.648919] Kernel panic - not syncing: panic_on_warn set ... [ 28.648919] [ 28.656272] CPU: 1 PID: 7994 Comm: syz-executor421 Not tainted 4.14.302-syzkaller #0 [ 28.664141] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 28.664548] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 28.673650] Call Trace: [ 28.673666] dump_stack+0x1b2/0x281 [ 28.673677] panic+0x1f9/0x42d [ 28.673684] ? add_taint.cold+0x16/0x16 [ 28.673692] ? sysfs_warn_dup.cold+0x17/0x26 [ 28.673701] ? sysfs_warn_dup.cold+0x17/0x26 [ 28.673707] __warn.cold+0x20/0x44 [ 28.673715] ? ist_end_non_atomic+0x10/0x10 [ 28.673720] ? sysfs_warn_dup.cold+0x17/0x26 [ 28.673727] report_bug+0x208/0x250 [ 28.673736] do_error_trap+0x195/0x2d0 [ 28.673744] ? math_error+0x2d0/0x2d0 [ 28.673751] ? ___preempt_schedule+0x16/0x18 [ 28.673762] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.684370] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 28.686685] invalid_op+0x1b/0x40 [ 28.686695] RIP: 0010:sysfs_warn_dup.cold+0x17/0x26 [ 28.686699] RSP: 0018:ffff8880b321f728 EFLAGS: 00010282 [ 28.698096] ------------[ cut here ]------------ [ 28.698204] RAX: 000000000000003a RBX: ffff8880b335db90 RCX: 0000000000000000 [ 28.702601] WARNING: CPU: 0 PID: 7996 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x26 [ 28.706104] RDX: 0000000000000000 RSI: ffffffff878bd020 RDI: ffffed1016643edb [ 28.710393] Modules linked in: [ 28.714774] RBP: ffff888095b50e80 R08: 000000000000003a R09: 0000000000000000 [ 28.722334] R10: 0000000000000000 R11: 0000000000000000 R12: ffff888238f93b60 [ 28.726106] CPU: 0 PID: 7996 Comm: syz-executor421 Not tainted 4.14.302-syzkaller #0 [ 28.730482] R13: ffff88809f7366c0 R14: ffff8880b335db98 R15: ffff8880959e9b58 [ 28.735295] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 28.741955] ? sysfs_warn_dup.cold+0x17/0x26 [ 28.745374] task: ffff8880b2f32440 task.stack: ffff8880b4f88000 [ 28.750540] sysfs_create_dir_ns+0x16f/0x1d0 [ 28.755973] RIP: 0010:sysfs_warn_dup.cold+0x17/0x26 [ 28.760700] kobject_add_internal+0x28b/0x930 [ 28.767940] RSP: 0018:ffff8880b4f8f728 EFLAGS: 00010282 [ 28.776318] kobject_init_and_add+0xde/0x120 [ 28.786733] ? kobject_create_and_add+0x200/0x200 [ 28.794110] RAX: 000000000000003a RBX: ffff888095b5dbd0 RCX: 0000000000000000 [ 28.794118] RDX: 0000000000000000 RSI: ffffffff878bd020 RDI: ffffed10169f1edb [ 28.801406] ? vsnprintf+0x260/0x1340 [ 28.809259] RBP: ffff8880956e60c0 R08: 000000000000003a R09: 0000000000000001 [ 28.816623] gfs2_sys_fs_add+0x184/0x3f0 [ 28.825940] R10: 0000000000000000 R11: 0000000000000000 R12: ffff888238f93b60 [ 28.830325] ? recover_store+0x100/0x100 [ 28.836363] R13: ffff8880a22eaa00 R14: ffff888095b5dbd8 R15: ffff8880b10f5c18 [ 28.840754] ? snprintf+0xa5/0xd0 [ 28.845899] FS: 0000555556d0f300(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 [ 28.850370] ? strscpy+0x94/0x280 [ 28.855701] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 28.860174] fill_super+0x118b/0x2310 [ 28.865064] CR2: 00007f15ab9ad000 CR3: 000000009be95000 CR4: 00000000003406f0 [ 28.872314] ? vsnprintf+0x260/0x1340 [ 28.879642] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 28.883416] ? gfs2_online_uevent+0x1b0/0x1b0 [ 28.890654] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 28.894689] ? pointer+0x9e0/0x9e0 [ 28.901928] Call Trace: [ 28.905968] ? snprintf+0xa5/0xd0 [ 28.913211] sysfs_create_dir_ns+0x16f/0x1d0 [ 28.916634] ? vsprintf+0x30/0x30 [ 28.924833] kobject_add_internal+0x28b/0x930 [ 28.928284] ? gfs2_open+0x160/0x160 [ 28.934675] kobject_init_and_add+0xde/0x120 [ 28.938559] ? set_blocksize+0x125/0x380 [ 28.945812] ? kobject_create_and_add+0x200/0x200 [ 28.949588] gfs2_mount+0x439/0x510 [ 28.956850] ? vsnprintf+0x260/0x1340 [ 28.961334] ? fill_super+0x2310/0x2310 [ 28.968590] gfs2_sys_fs_add+0x184/0x3f0 [ 28.972118] ? alloc_pages_current+0x15d/0x260 [ 28.974665] ? recover_store+0x100/0x100 [ 28.978090] ? __lockdep_init_map+0x100/0x560 [ 28.982469] ? snprintf+0xa5/0xd0 [ 28.985892] mount_fs+0x92/0x2a0 [ 28.990363] ? strscpy+0x94/0x280 [ 28.994050] vfs_kern_mount.part.0+0x5b/0x470 [ 28.998425] fill_super+0x118b/0x2310 [ 29.002455] do_mount+0xe65/0x2a30 [ 29.007290] ? vsnprintf+0x260/0x1340 [ 29.010891] ? do_raw_spin_unlock+0x164/0x220 [ 29.014662] ? gfs2_online_uevent+0x1b0/0x1b0 [ 29.018611] ? copy_mount_string+0x40/0x40 [ 29.022726] ? pointer+0x9e0/0x9e0 [ 29.027280] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 29.031313] ? snprintf+0xa5/0xd0 [ 29.035778] ? copy_mnt_ns+0xa30/0xa30 [ 29.039200] ? vsprintf+0x30/0x30 [ 29.042545] ? copy_mount_options+0x1fa/0x2f0 [ 29.045974] ? gfs2_open+0x160/0x160 [ 29.050563] ? copy_mnt_ns+0xa30/0xa30 [ 29.054338] ? set_blocksize+0x125/0x380 [ 29.057848] SyS_mount+0xa8/0x120 [ 29.061621] gfs2_mount+0x439/0x510 [ 29.066085] ? copy_mnt_ns+0xa30/0xa30 [ 29.070560] ? fill_super+0x2310/0x2310 [ 29.074770] do_syscall_64+0x1d5/0x640 [ 29.078295] ? alloc_pages_current+0x15d/0x260 [ 29.083276] entry_SYSCALL_64_after_hwframe+0x5e/0xd3 [ 29.086697] ? __lockdep_init_map+0x100/0x560 [ 29.090589] RIP: 0033:0x7f9b47c066ea [ 29.094015] mount_fs+0x92/0x2a0 [ 29.098481] RSP: 002b:00007ffc1ee7cf28 EFLAGS: 00000282 [ 29.102172] vfs_kern_mount.part.0+0x5b/0x470 [ 29.106030] ORIG_RAX: 00000000000000a5 [ 29.110063] do_mount+0xe65/0x2a30 [ 29.113492] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f9b47c066ea [ 29.117095] ? copy_mount_string+0x40/0x40 [ 29.122420] RDX: 00000000200124c0 RSI: 0000000020000040 RDI: 00007ffc1ee7cf40 [ 29.122426] RBP: 00007ffc1ee7cf40 R08: 00007ffc1ee7cf80 R09: 0000000000000002 [ 29.126383] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 29.130236] R10: 0000000000000000 R11: 0000000000000282 R12: 0000000000000004 [ 29.134875] ? copy_mnt_ns+0xa30/0xa30 [ 29.140030] R13: 0000555556d0f2c0 R14: 0000000000000000 R15: 00007ffc1ee7cf80 [ 29.218989] ? copy_mount_options+0x1fa/0x2f0 [ 29.223485] ? copy_mnt_ns+0xa30/0xa30 [ 29.227358] SyS_mount+0xa8/0x120 [ 29.230795] ? copy_mnt_ns+0xa30/0xa30 [ 29.234668] do_syscall_64+0x1d5/0x640 [ 29.239410] entry_SYSCALL_64_after_hwframe+0x5e/0xd3 [ 29.244591] RIP: 0033:0x7f9b47c066ea [ 29.248287] RSP: 002b:00007ffc1ee7cf28 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5 [ 29.256066] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f9b47c066ea [ 29.263320] RDX: 00000000200124c0 RSI: 0000000020000040 RDI: 00007ffc1ee7cf40 [ 29.270578] RBP: 00007ffc1ee7cf40 R08: 00007ffc1ee7cf80 R09: 0000000000000002 [ 29.277829] R10: 0000000000000000 R11: 0000000000000282 R12: 0000000000000004 [ 29.285084] R13: 0000555556d0f2c0 R14: 0000000000000000 R15: 00007ffc1ee7cf80 [ 29.292462] Code: bd ea ff ff ff e9 8f c2 9f fa 4c 89 ff e8 74 de 7a fa eb da e8 6d 1d 51 fa 4c 89 ea 48 89 ee 48 c7 c7 80 c4 95 87 e8 e5 fb fe ff <0f> 0b 48 89 ef 5d 41 5c 41 5d e9 4c b4 7a fa e8 47 1d 51 fa 4d [ 29.311730] ---[ end trace 0730c0f51cd490be ]--- [ 29.316735] Kernel Offset: disabled [ 29.320392] Rebooting in 86400 seconds..