Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.86' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 28.041301] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 28.065620] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 28.073995] gfs2: fsid=syz:syz: Now mounting FS... [ 28.077994] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 28.096288] ------------[ cut here ]------------ [ 28.101077] WARNING: CPU: 1 PID: 7989 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x26 [ 28.102941] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 28.109293] Kernel panic - not syncing: panic_on_warn set ... [ 28.109293] [ 28.109302] CPU: 1 PID: 7989 Comm: syz-executor556 Not tainted 4.14.302-syzkaller #0 [ 28.109307] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 28.109310] Call Trace: [ 28.109324] dump_stack+0x1b2/0x281 [ 28.109334] panic+0x1f9/0x42d [ 28.109340] ? add_taint.cold+0x16/0x16 [ 28.109350] ? sysfs_warn_dup.cold+0x17/0x26 [ 28.109358] ? sysfs_warn_dup.cold+0x17/0x26 [ 28.109364] __warn.cold+0x20/0x44 [ 28.109373] ? ist_end_non_atomic+0x10/0x10 [ 28.109378] ? sysfs_warn_dup.cold+0x17/0x26 [ 28.109386] report_bug+0x208/0x250 [ 28.109395] do_error_trap+0x195/0x2d0 [ 28.109403] ? math_error+0x2d0/0x2d0 [ 28.109412] ? ___preempt_schedule+0x16/0x18 [ 28.134703] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 28.140631] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.140644] invalid_op+0x1b/0x40 [ 28.140654] RIP: 0010:sysfs_warn_dup.cold+0x17/0x26 [ 28.140659] RSP: 0018:ffff8880a8cdf728 EFLAGS: 00010282 [ 28.140666] RAX: 000000000000003a RBX: ffff888095881c90 RCX: 0000000000000000 [ 28.140671] RDX: 0000000000000000 RSI: ffffffff878bd020 RDI: ffffed101519bedb [ 28.140676] RBP: ffff8880aad3e140 R08: 000000000000003a R09: 0000000000000000 [ 28.140680] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880b0f8fa80 [ 28.140684] R13: ffff8880b1705d80 R14: ffff888095881c98 R15: ffff88809577dc58 [ 28.140699] ? sysfs_warn_dup.cold+0x17/0x26 [ 28.140709] sysfs_create_dir_ns+0x16f/0x1d0 [ 28.157319] ------------[ cut here ]------------ [ 28.158420] kobject_add_internal+0x28b/0x930 [ 28.162807] WARNING: CPU: 0 PID: 7991 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x26 [ 28.166320] kobject_init_and_add+0xde/0x120 [ 28.170608] Modules linked in: [ 28.174995] ? kobject_create_and_add+0x200/0x200 [ 28.182456] ? vsnprintf+0x260/0x1340 [ 28.186243] CPU: 0 PID: 7991 Comm: syz-executor556 Not tainted 4.14.302-syzkaller #0 [ 28.190633] gfs2_sys_fs_add+0x184/0x3f0 [ 28.197282] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 28.202116] ? recover_store+0x100/0x100 [ 28.205539] task: ffff8880969880c0 task.stack: ffff8880a1c48000 [ 28.210538] ? snprintf+0xa5/0xd0 [ 28.215885] RIP: 0010:sysfs_warn_dup.cold+0x17/0x26 [ 28.223131] ? strscpy+0x94/0x280 [ 28.230370] RSP: 0018:ffff8880a1c4f728 EFLAGS: 00010282 [ 28.237623] fill_super+0x118b/0x2310 [ 28.252206] ? vsnprintf+0x260/0x1340 [ 28.256582] RAX: 000000000000003a RBX: ffff8880965c1d50 RCX: 0000000000000000 [ 28.261399] ? gfs2_online_uevent+0x1b0/0x1b0 [ 28.266125] RDX: 0000000000000000 RSI: ffffffff878bd020 RDI: ffffed1014389edb [ 28.266131] RBP: ffff8880b3f18680 R08: 000000000000003a R09: 0000000000000001 [ 28.270603] ? pointer+0x9e0/0x9e0 [ 28.278802] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880b0f8fa80 [ 28.283194] ? snprintf+0xa5/0xd0 [ 28.286356] R13: ffff8880b195dec0 R14: ffff8880965c1d58 R15: ffff888095121d18 [ 28.291173] ? vsprintf+0x30/0x30 [ 28.294944] FS: 00005555559c0300(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 [ 28.302798] ? gfs2_open+0x160/0x160 [ 28.306828] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 28.316164] ? set_blocksize+0x125/0x380 [ 28.320195] CR2: 00007fb470cf6710 CR3: 00000000ab1d8000 CR4: 00000000003406f0 [ 28.326229] gfs2_mount+0x439/0x510 [ 28.329652] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 28.334647] ? fill_super+0x2310/0x2310 [ 28.338066] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 28.338070] Call Trace: [ 28.343425] ? alloc_pages_current+0x15d/0x260 [ 28.347217] sysfs_create_dir_ns+0x16f/0x1d0 [ 28.350988] ? __lockdep_init_map+0x100/0x560 [ 28.358233] kobject_add_internal+0x28b/0x930 [ 28.362703] mount_fs+0x92/0x2a0 [ 28.369973] kobject_init_and_add+0xde/0x120 [ 28.377329] vfs_kern_mount.part.0+0x5b/0x470 [ 28.380844] ? kobject_create_and_add+0x200/0x200 [ 28.388120] do_mount+0xe65/0x2a30 [ 28.391549] ? vsnprintf+0x260/0x1340 [ 28.398793] ? retint_kernel+0x2d/0x2d [ 28.402229] gfs2_sys_fs_add+0x184/0x3f0 [ 28.410427] ? copy_mount_string+0x40/0x40 [ 28.414234] ? recover_store+0x100/0x100 [ 28.420096] ? memset+0x20/0x40 [ 28.424131] ? snprintf+0xa5/0xd0 [ 28.431376] ? copy_mount_options+0x1fa/0x2f0 [ 28.434980] ? strscpy+0x94/0x280 [ 28.442222] ? copy_mnt_ns+0xa30/0xa30 [ 28.446173] fill_super+0x118b/0x2310 [ 28.453416] SyS_mount+0xa8/0x120 [ 28.455977] ? vsnprintf+0x260/0x1340 [ 28.460532] ? copy_mnt_ns+0xa30/0xa30 [ 28.464922] ? gfs2_online_uevent+0x1b0/0x1b0 [ 28.469394] do_syscall_64+0x1d5/0x640 [ 28.473858] ? pointer+0x9e0/0x9e0 [ 28.477216] entry_SYSCALL_64_after_hwframe+0x5e/0xd3 [ 28.481595] ? snprintf+0xa5/0xd0 [ 28.486064] RIP: 0033:0x7f216bcc06ea [ 28.490879] ? vsprintf+0x30/0x30 [ 28.494397] RSP: 002b:00007ffdf3f116a8 EFLAGS: 00000282 [ 28.498177] ? gfs2_open+0x160/0x160 [ 28.502034] ORIG_RAX: 00000000000000a5 [ 28.506073] ? set_blocksize+0x125/0x380 [ 28.510280] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f216bcc06ea [ 28.514317] gfs2_mount+0x439/0x510 [ 28.517566] RDX: 0000000020000040 RSI: 0000000020012500 RDI: 00007ffdf3f116c0 [ 28.520996] ? fill_super+0x2310/0x2310 [ 28.525462] RBP: 00007ffdf3f116c0 R08: 00007ffdf3f11700 R09: 0000000000000002 [ 28.528903] ? alloc_pages_current+0x15d/0x260 [ 28.532835] R10: 0000000000000000 R11: 0000000000000282 R12: 0000000000000004 [ 28.536609] ? __lockdep_init_map+0x100/0x560 [ 28.540038] R13: 00005555559c02c0 R14: 0000000000000000 R15: 00007ffdf3f11700 [ 28.543815] mount_fs+0x92/0x2a0 [ 28.648582] vfs_kern_mount.part.0+0x5b/0x470 [ 28.653063] do_mount+0xe65/0x2a30 [ 28.656593] ? retint_kernel+0x2d/0x2d [ 28.660466] ? copy_mount_string+0x40/0x40 [ 28.664688] ? memset+0x20/0x40 [ 28.667949] ? copy_mount_options+0x1fa/0x2f0 [ 28.672431] ? copy_mnt_ns+0xa30/0xa30 [ 28.676303] SyS_mount+0xa8/0x120 [ 28.679737] ? copy_mnt_ns+0xa30/0xa30 [ 28.683612] do_syscall_64+0x1d5/0x640 [ 28.687484] entry_SYSCALL_64_after_hwframe+0x5e/0xd3 [ 28.692656] RIP: 0033:0x7f216bcc06ea [ 28.696351] RSP: 002b:00007ffdf3f116a8 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5 [ 28.704128] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f216bcc06ea [ 28.711382] RDX: 0000000020000040 RSI: 0000000020012500 RDI: 00007ffdf3f116c0 [ 28.718809] RBP: 00007ffdf3f116c0 R08: 00007ffdf3f11700 R09: 0000000000000002 [ 28.726059] R10: 0000000000000000 R11: 0000000000000282 R12: 0000000000000004 [ 28.733315] R13: 00005555559c02c0 R14: 0000000000000000 R15: 00007ffdf3f11700 [ 28.740576] 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 [ 28.759757] ---[ end trace 92ef19e80379cab1 ]--- [ 28.764645] Kernel Offset: disabled [ 28.768312] Rebooting in 86400 seconds..