Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.10.52' (ECDSA) to the list of known hosts. syzkaller login: [ 28.119489] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 28.145174] gfs2: fsid=syz:syz: Now mounting FS... [ 28.156168] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 28.158198] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 28.182342] ------------[ cut here ]------------ [ 28.187132] WARNING: CPU: 1 PID: 7984 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x26 [ 28.189598] ------------[ cut here ]------------ [ 28.195354] Kernel panic - not syncing: panic_on_warn set ... [ 28.195354] [ 28.200107] WARNING: CPU: 0 PID: 7982 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x26 [ 28.207447] CPU: 1 PID: 7984 Comm: syz-executor250 Not tainted 4.14.302-syzkaller #0 [ 28.215651] Modules linked in: [ 28.223505] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 28.226674] Call Trace: [ 28.236005] CPU: 0 PID: 7982 Comm: syz-executor250 Not tainted 4.14.302-syzkaller #0 [ 28.238573] dump_stack+0x1b2/0x281 [ 28.246431] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 28.250036] panic+0x1f9/0x42d [ 28.259363] task: ffff88809cace680 task.stack: ffff8880b3028000 [ 28.262529] ? add_taint.cold+0x16/0x16 [ 28.268560] RIP: 0010:sysfs_warn_dup.cold+0x17/0x26 [ 28.272506] ? sysfs_warn_dup.cold+0x17/0x26 [ 28.277492] RSP: 0018:ffff8880b302f728 EFLAGS: 00010282 [ 28.281884] ? sysfs_warn_dup.cold+0x17/0x26 [ 28.281892] __warn.cold+0x20/0x44 [ 28.287227] RAX: 000000000000003a RBX: ffff8880955bdd50 RCX: 0000000000000000 [ 28.291617] ? ist_end_non_atomic+0x10/0x10 [ 28.295122] RDX: 0000000000000000 RSI: ffffffff878bd020 RDI: ffffed1016605edb [ 28.302370] ? sysfs_warn_dup.cold+0x17/0x26 [ 28.306664] RBP: ffff888095714180 R08: 000000000000003a R09: 0000000000000000 [ 28.313914] report_bug+0x208/0x250 [ 28.318290] R10: 0000000000000000 R11: 0000000000000000 R12: ffff888238ffa000 [ 28.318296] R13: ffff8880a9d91980 R14: ffff8880955bdd58 R15: ffff8880b2b01d18 [ 28.325545] do_error_trap+0x195/0x2d0 [ 28.329144] FS: 0000555556c99300(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 [ 28.336392] ? math_error+0x2d0/0x2d0 [ 28.343643] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 28.347505] ? ___preempt_schedule+0x16/0x18 [ 28.355703] CR2: 00007fc865804290 CR3: 000000009a550000 CR4: 00000000003406f0 [ 28.359479] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.365331] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 28.369717] invalid_op+0x1b/0x40 [ 28.376956] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 28.381774] RIP: 0010:sysfs_warn_dup.cold+0x17/0x26 [ 28.389013] Call Trace: [ 28.392440] RSP: 0018:ffff8880b3127728 EFLAGS: 00010282 [ 28.399689] sysfs_create_dir_ns+0x16f/0x1d0 [ 28.407239] kobject_add_internal+0x28b/0x930 [ 28.412567] RAX: 000000000000003a RBX: ffff8880b2b01d10 RCX: 0000000000000000 [ 28.412573] RDX: 0000000000000000 RSI: ffffffff878bd020 RDI: ffffed1016624edb [ 28.416959] kobject_init_and_add+0xde/0x120 [ 28.421419] RBP: ffff8880b198a8c0 R08: 000000000000003a R09: 0000000000000000 [ 28.421424] R10: 0000000000000000 R11: 0000000000000000 R12: ffff888238ffa000 [ 28.428679] ? kobject_create_and_add+0x200/0x200 [ 28.435922] R13: ffff8880b3f83600 R14: ffff8880b2b01d18 R15: ffff8880b1ac9cd8 [ 28.440309] ? vsnprintf+0x260/0x1340 [ 28.447560] ? sysfs_warn_dup.cold+0x17/0x26 [ 28.454806] gfs2_sys_fs_add+0x184/0x3f0 [ 28.459617] sysfs_create_dir_ns+0x16f/0x1d0 [ 28.466862] ? recover_store+0x100/0x100 [ 28.470636] kobject_add_internal+0x28b/0x930 [ 28.475016] ? snprintf+0xa5/0xd0 [ 28.479051] kobject_init_and_add+0xde/0x120 [ 28.483453] ? strscpy+0x94/0x280 [ 28.487485] ? kobject_create_and_add+0x200/0x200 [ 28.491953] fill_super+0x118b/0x2310 [ 28.495379] ? vsnprintf+0x260/0x1340 [ 28.499761] ? vsnprintf+0x260/0x1340 [ 28.503190] gfs2_sys_fs_add+0x184/0x3f0 [ 28.508000] ? gfs2_online_uevent+0x1b0/0x1b0 [ 28.511772] ? recover_store+0x100/0x100 [ 28.515544] ? pointer+0x9e0/0x9e0 [ 28.519331] ? snprintf+0xa5/0xd0 [ 28.523370] ? snprintf+0xa5/0xd0 [ 28.527840] ? strscpy+0x94/0x280 [ 28.531872] ? vsprintf+0x30/0x30 [ 28.535384] fill_super+0x118b/0x2310 [ 28.538809] ? gfs2_open+0x160/0x160 [ 28.542235] ? vsnprintf+0x260/0x1340 [ 28.545659] ? set_blocksize+0x125/0x380 [ 28.549082] ? gfs2_online_uevent+0x1b0/0x1b0 [ 28.552860] gfs2_mount+0x439/0x510 [ 28.556542] ? pointer+0x9e0/0x9e0 [ 28.560314] ? fill_super+0x2310/0x2310 [ 28.564349] ? snprintf+0xa5/0xd0 [ 28.568831] ? alloc_pages_current+0x15d/0x260 [ 28.572419] ? vsprintf+0x30/0x30 [ 28.575933] ? __lockdep_init_map+0x100/0x560 [ 28.579876] ? gfs2_open+0x160/0x160 [ 28.583304] mount_fs+0x92/0x2a0 [ 28.587858] ? set_blocksize+0x125/0x380 [ 28.591289] vfs_kern_mount.part.0+0x5b/0x470 [ 28.595759] gfs2_mount+0x439/0x510 [ 28.599444] do_mount+0xe65/0x2a30 [ 28.602792] ? fill_super+0x2310/0x2310 [ 28.606830] ? copy_mount_string+0x40/0x40 [ 28.611303] ? alloc_pages_current+0x15d/0x260 [ 28.614896] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 28.618406] ? __lockdep_init_map+0x100/0x560 [ 28.622350] ? copy_mnt_ns+0xa30/0xa30 [ 28.626557] mount_fs+0x92/0x2a0 [ 28.631113] ? copy_mount_options+0x1fa/0x2f0 [ 28.636103] vfs_kern_mount.part.0+0x5b/0x470 [ 28.640569] ? copy_mnt_ns+0xa30/0xa30 [ 28.644431] do_mount+0xe65/0x2a30 [ 28.647770] SyS_mount+0xa8/0x120 [ 28.652235] ? do_raw_spin_unlock+0x164/0x220 [ 28.656702] ? copy_mnt_ns+0xa30/0xa30 [ 28.660565] ? copy_mount_string+0x40/0x40 [ 28.664084] do_syscall_64+0x1d5/0x640 [ 28.667504] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 28.671973] entry_SYSCALL_64_after_hwframe+0x5e/0xd3 [ 28.675829] ? copy_mnt_ns+0xa30/0xa30 [ 28.680034] RIP: 0033:0x7f6c13a7a6ea [ 28.683893] ? copy_mount_options+0x1fa/0x2f0 [ 28.688877] RSP: 002b:00007fffda057c38 EFLAGS: 00000282 [ 28.694040] ? copy_mnt_ns+0xa30/0xa30 [ 28.697893] ORIG_RAX: 00000000000000a5 [ 28.701586] SyS_mount+0xa8/0x120 [ 28.706050] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f6c13a7a6ea [ 28.711386] ? copy_mnt_ns+0xa30/0xa30 [ 28.715241] RDX: 00000000200124c0 RSI: 0000000020000040 RDI: 00007fffda057c50 [ 28.715247] RBP: 00007fffda057c50 R08: 00007fffda057c90 R09: 0000000000000002 [ 28.719196] do_syscall_64+0x1d5/0x640 [ 28.722621] R10: 0000000000000000 R11: 0000000000000282 R12: 0000000000000004 [ 28.729876] entry_SYSCALL_64_after_hwframe+0x5e/0xd3 [ 28.733729] R13: 0000555556c992c0 R14: 0000000000000000 R15: 00007fffda057c90 [ 28.740979] RIP: 0033:0x7f6c13a7a6ea [ 28.748230] Code: [ 28.752084] RSP: 002b:00007fffda057c38 EFLAGS: 00000282 [ 28.759324] bd [ 28.764487] ORIG_RAX: 00000000000000a5 [ 28.771730] ea [ 28.775426] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f6c13a7a6ea [ 28.777545] ff [ 28.782886] RDX: 00000000200124c0 RSI: 0000000020000040 RDI: 00007fffda057c50 [ 28.784750] ff [ 28.788785] RBP: 00007fffda057c50 R08: 00007fffda057c90 R09: 0000000000000002 [ 28.790647] ff [ 28.797889] R10: 0000000000000000 R11: 0000000000000282 R12: 0000000000000004 [ 28.797895] R13: 0000555556c992c0 R14: 0000000000000000 R15: 00007fffda057c90 [ 28.799757] 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 [ 28.849855] ---[ end trace 4161fe9eaa3ecb9a ]--- [ 28.854799] Kernel Offset: disabled [ 28.858451] Rebooting in 86400 seconds..