[ OK ] Started getty on tty2-tty6 if dbus and logind are not available. [ OK ] Started OpenBSD Secure Shell server. [ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. [ OK ] Started Getty on tty6. [ OK ] Started Getty on tty5. [ 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 '10.128.0.242' (ECDSA) to the list of known hosts. syzkaller login: [ 33.005845] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 33.039373] gfs2: fsid=syz:syz: Now mounting FS... [ 33.073387] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 33.080253] ------------[ cut here ]------------ [ 33.084406] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 33.085020] WARNING: CPU: 0 PID: 8010 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x26 [ 33.085028] Kernel panic - not syncing: kernel: panic_on_warn set ... [ 33.085028] [ 33.085040] CPU: 0 PID: 8010 Comm: syz-executor734 Not tainted 4.14.305-syzkaller #0 [ 33.085046] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 [ 33.085052] Call Trace: [ 33.095526] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 33.099996] dump_stack+0x1b2/0x281 [ 33.100013] panic+0x21d/0x451 [ 33.100024] ? add_taint.cold+0x16/0x16 [ 33.100035] ? log_store.cold+0x16/0x16 [ 33.100055] ? sysfs_warn_dup.cold+0x17/0x26 [ 33.118048] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 33.125362] check_panic_on_warn.cold+0x19/0x35 [ 33.125377] __warn+0xdf/0x1e0 [ 33.125391] ? ist_end_non_atomic+0x10/0x10 [ 33.125403] ? sysfs_warn_dup.cold+0x17/0x26 [ 33.125414] report_bug+0x208/0x250 [ 33.125427] do_error_trap+0x195/0x2d0 [ 33.125439] ? math_error+0x2d0/0x2d0 [ 33.125457] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.125472] invalid_op+0x1b/0x40 [ 33.132775] ------------[ cut here ]------------ [ 33.134762] RIP: 0010:sysfs_warn_dup.cold+0x17/0x26 [ 33.138378] WARNING: CPU: 1 PID: 8013 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x26 [ 33.141550] RSP: 0018:ffff88809ab4f728 EFLAGS: 00010282 [ 33.145504] Modules linked in: [ 33.160645] RAX: 000000000000003a RBX: ffff8880aaded650 RCX: 0000000000000000 [ 33.165302] CPU: 1 PID: 8013 Comm: syz-executor734 Not tainted 4.14.305-syzkaller #0 [ 33.168502] RDX: 0000000000000000 RSI: ffffffff878bd360 RDI: ffffed1013569edb [ 33.172805] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 [ 33.177198] RBP: ffff8880b1aaa1c0 R08: 000000000000003a R09: 0000000000000000 [ 33.180814] task: ffff8880b35ac100 task.stack: ffff888095868000 [ 33.184705] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880b080ad20 [ 33.188498] RIP: 0010:sysfs_warn_dup.cold+0x17/0x26 [ 33.193322] R13: ffff8880a1929140 R14: ffff8880aaded658 R15: ffff8880aade5618 [ 33.196757] RSP: 0018:ffff88809586f728 EFLAGS: 00010282 [ 33.201515] ? sysfs_warn_dup.cold+0x17/0x26 [ 33.214809] sysfs_create_dir_ns+0x16f/0x1d0 [ 33.220151] RAX: 000000000000003a RBX: ffff88809466da50 RCX: 0000000000000000 [ 33.223339] kobject_add_internal+0x28b/0x930 [ 33.230593] RDX: 0000000000000000 RSI: ffffffff878bd360 RDI: ffffed1012b0dedb [ 33.238473] kobject_init_and_add+0xde/0x120 [ 33.245829] RBP: ffff8880b2f38380 R08: 000000000000003a R09: 0000000000000001 [ 33.255194] ? kobject_create_and_add+0x200/0x200 [ 33.262457] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880b080ad20 [ 33.268514] ? vsnprintf+0x260/0x1340 [ 33.275786] R13: ffff8880b0647640 R14: ffff88809466da58 R15: ffff8880aaded658 [ 33.280797] gfs2_sys_fs_add+0x184/0x3f0 [ 33.288048] FS: 0000555555ab8300(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 [ 33.293400] ? recover_store+0x100/0x100 [ 33.297790] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 33.302189] ? snprintf+0xa5/0xd0 [ 33.309443] CR2: 00007f4236b58000 CR3: 00000000a029d000 CR4: 00000000003406e0 [ 33.313928] ? strscpy+0x94/0x280 [ 33.321179] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 33.325580] fill_super+0x118b/0x2310 [ 33.332860] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 33.337697] ? vsnprintf+0x260/0x1340 [ 33.344955] Call Trace: [ 33.348747] ? gfs2_online_uevent+0x1b0/0x1b0 [ 33.356122] sysfs_create_dir_ns+0x16f/0x1d0 [ 33.360162] ? pointer+0x9e0/0x9e0 [ 33.368379] kobject_add_internal+0x28b/0x930 [ 33.372430] ? snprintf+0xa5/0xd0 [ 33.378316] kobject_init_and_add+0xde/0x120 [ 33.381759] ? vsprintf+0x30/0x30 [ 33.389033] ? kobject_create_and_add+0x200/0x200 [ 33.392474] ? set_blocksize+0x125/0x380 [ 33.399739] ? vsnprintf+0x260/0x1340 [ 33.403528] gfs2_mount+0x439/0x510 [ 33.410802] gfs2_sys_fs_add+0x184/0x3f0 [ 33.414591] ? fill_super+0x2310/0x2310 [ 33.417165] ? recover_store+0x100/0x100 [ 33.421662] ? alloc_pages_current+0x15d/0x260 [ 33.426037] ? snprintf+0xa5/0xd0 [ 33.429561] ? __lockdep_init_map+0x100/0x560 [ 33.434041] ? strscpy+0x94/0x280 [ 33.437475] mount_fs+0x92/0x2a0 [ 33.441940] fill_super+0x118b/0x2310 [ 33.445381] vfs_kern_mount.part.0+0x5b/0x470 [ 33.450208] ? vsnprintf+0x260/0x1340 [ 33.454277] do_mount+0xe65/0x2a30 [ 33.458073] ? gfs2_online_uevent+0x1b0/0x1b0 [ 33.461688] ? retint_kernel+0x2d/0x2d [ 33.465746] ? pointer+0x9e0/0x9e0 [ 33.469710] ? copy_mount_string+0x40/0x40 [ 33.473760] ? snprintf+0xa5/0xd0 [ 33.478329] ? memset+0x20/0x40 [ 33.481771] ? vsprintf+0x30/0x30 [ 33.486250] ? copy_mount_options+0x1fa/0x2f0 [ 33.489689] ? set_blocksize+0x125/0x380 [ 33.493158] ? copy_mnt_ns+0xa30/0xa30 [ 33.496946] gfs2_mount+0x439/0x510 [ 33.501511] SyS_mount+0xa8/0x120 [ 33.505295] ? fill_super+0x2310/0x2310 [ 33.508823] ? copy_mnt_ns+0xa30/0xa30 [ 33.513330] ? alloc_pages_current+0x15d/0x260 [ 33.517188] do_syscall_64+0x1d5/0x640 [ 33.520713] ? __lockdep_init_map+0x100/0x560 [ 33.524987] entry_SYSCALL_64_after_hwframe+0x5e/0xd3 [ 33.528419] mount_fs+0x92/0x2a0 [ 33.531699] RIP: 0033:0x7fc2ac3ec9da [ 33.535140] vfs_kern_mount.part.0+0x5b/0x470 [ 33.539611] RSP: 002b:00007ffe020787f8 EFLAGS: 00000282 [ 33.543665] do_mount+0xe65/0x2a30 [ 33.547532] ORIG_RAX: 00000000000000a5 [ 33.551149] ? retint_kernel+0x2d/0x2d [ 33.554581] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fc2ac3ec9da [ 33.558557] ? copy_mount_string+0x40/0x40 [ 33.562426] RDX: 0000000020000100 RSI: 0000000020012500 RDI: 00007ffe02078800 [ 33.566998] ? memset+0x20/0x40 [ 33.570865] RBP: 00007ffe02078800 R08: 00007ffe02078840 R09: 0000000000000002 [ 33.575438] ? copy_mount_options+0x1fa/0x2f0 [ 33.580633] R10: 0000000000000819 R11: 0000000000000282 R12: 0000000000000004 [ 33.583990] ? copy_mnt_ns+0xa30/0xa30 [ 33.587695] R13: 0000555555ab82c0 R14: 00007ffe02078840 R15: 0000000000000000 [ 33.592178] SyS_mount+0xa8/0x120 [ 33.664560] ? copy_mnt_ns+0xa30/0xa30 [ 33.668445] do_syscall_64+0x1d5/0x640 [ 33.672337] entry_SYSCALL_64_after_hwframe+0x5e/0xd3 [ 33.677522] RIP: 0033:0x7fc2ac3ec9da [ 33.681227] RSP: 002b:00007ffe020787f8 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5 [ 33.689034] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fc2ac3ec9da [ 33.696298] RDX: 0000000020000100 RSI: 0000000020012500 RDI: 00007ffe02078800 [ 33.703566] RBP: 00007ffe02078800 R08: 00007ffe02078840 R09: 0000000000000002 [ 33.711353] R10: 0000000000000819 R11: 0000000000000282 R12: 0000000000000004 [ 33.718620] R13: 0000555555ab82c0 R14: 00007ffe02078840 R15: 0000000000000000 [ 33.725895] Code: bd ea ff ff ff e9 4f 9c 9f fa 4c 89 ff e8 b4 b6 7a fa eb da e8 fd f3 50 fa 4c 89 ea 48 89 ee 48 c7 c7 80 c8 95 87 e8 fd fb fe ff <0f> 0b 48 89 ef 5d 41 5c 41 5d e9 8c 8c 7a fa e8 d7 f3 50 fa 4d [ 33.745118] ---[ end trace 454171f5cef1c432 ]--- [ 33.750164] Kernel Offset: disabled [ 33.753833] Rebooting in 86400 seconds..