[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.240' (ECDSA) to the list of known hosts. syzkaller login: [ 33.806669] audit: type=1400 audit(1591074608.463:8): avc: denied { execmem } for pid=6323 comm="syz-executor754" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 33.836974] sysfs: cannot create duplicate filename '/fs/gfs2/gfs2' [ 33.838085] gfs2: can't find protocol dlm [ 33.849582] sysfs: cannot create duplicate filename '/fs/gfs2/gfs2' [ 33.853331] sysfs: cannot create duplicate filename '/fs/gfs2/gfs2' [ 33.856529] sysfs: cannot create duplicate filename '/fs/gfs2/gfs2' [ 33.865053] ------------[ cut here ]------------ [ 33.872800] ------------[ cut here ]------------ [ 33.873869] WARNING: CPU: 0 PID: 6337 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x2d [ 33.878607] WARNING: CPU: 1 PID: 6331 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x2d [ 33.886830] Kernel panic - not syncing: panic_on_warn set ... [ 33.886830] [ 33.895056] Modules linked in: [ 33.902479] CPU: 0 PID: 6337 Comm: syz-executor754 Not tainted 4.14.182-syzkaller #0 [ 33.902488] CPU: 1 PID: 6331 Comm: syz-executor754 Not tainted 4.14.182-syzkaller #0 [ 33.905762] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.913630] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.913636] task: ffff88809ffe4600 task.stack: ffff888098698000 [ 33.921502] Call Trace: [ 33.930953] RIP: 0010:sysfs_warn_dup.cold+0x17/0x2d [ 33.940296] dump_stack+0x1b2/0x283 [ 33.946324] RSP: 0018:ffff88809869f7c0 EFLAGS: 00010286 [ 33.948895] panic+0x1f9/0x42d [ 33.953886] RAX: 0000000000000037 RBX: ffff888099054950 RCX: 0000000000000000 [ 33.953892] RDX: 0000000000000000 RSI: ffffffff868c0980 RDI: ffffed10130d3eee [ 33.957494] ? add_taint.cold+0x16/0x16 [ 33.962948] RBP: ffff888094636840 R08: 0000000000000037 R09: 0000000000000000 [ 33.962955] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a65fb2a0 [ 33.966146] ? sysfs_warn_dup.cold+0x17/0x2d [ 33.973389] R13: ffff8880a993b9c0 R14: ffff888099054968 R15: ffff88809a138918 [ 33.980653] ? sysfs_warn_dup.cold+0x17/0x2d [ 33.984600] FS: 0000000001b22880(0000) GS:ffff8880aed00000(0000) knlGS:0000000000000000 [ 33.991851] __warn.cold+0x2f/0x30 [ 33.999114] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 34.003522] ? ist_end_non_atomic+0x10/0x10 [ 34.010785] CR2: 00005570866bba80 CR3: 000000009a113000 CR4: 00000000001406e0 [ 34.015175] ? sysfs_warn_dup.cold+0x17/0x2d [ 34.023574] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 34.027116] report_bug+0x20a/0x248 [ 34.032963] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 34.032967] Call Trace: [ 34.037272] do_error_trap+0x195/0x2d0 [ 34.044530] sysfs_create_dir_ns+0x16f/0x1d0 [ 34.048926] ? math_error+0x2d0/0x2d0 [ 34.048936] ? ___preempt_schedule+0x16/0x18 [ 34.056271] kobject_add_internal+0x27f/0x830 [ 34.059875] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.067130] kobject_init_and_add+0xde/0x120 [ 34.069693] invalid_op+0x1b/0x40 [ 34.073577] ? kobject_add_internal+0x830/0x830 [ 34.077960] RIP: 0010:sysfs_warn_dup.cold+0x17/0x2d [ 34.081831] ? vsnprintf+0x25e/0x1350 [ 34.086220] RSP: 0018:ffff8880990277c0 EFLAGS: 00010286 [ 34.091310] gfs2_sys_fs_add+0x184/0x3f0 [ 34.096156] RAX: 0000000000000037 RBX: ffff8880986f4990 RCX: 0000000000000000 [ 34.100544] ? recover_store+0x100/0x100 [ 34.104058] RDX: 0000000000000000 RSI: ffffffff868c0980 RDI: ffffed1013204eee [ 34.108792] ? snprintf+0xa5/0xd0 [ 34.113784] RBP: ffff88809d6b2940 R08: 0000000000000037 R09: 0000000000000000 [ 34.117574] ? filemap_write_and_wait+0x7e/0xa0 [ 34.122905] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a65fb2a0 [ 34.126943] ? kill_bdev+0x7c/0xe0 [ 34.126953] ? memcpy+0x35/0x50 [ 34.134198] R13: ffff8880a8bddb00 R14: ffff8880986f49a8 R15: ffff888099054958 [ 34.138257] fill_super+0x11a9/0x22a0 [ 34.145525] sysfs_create_dir_ns+0x16f/0x1d0 [ 34.149041] ? gfs2_online_uevent+0x1b0/0x1b0 [ 34.156289] kobject_add_internal+0x27f/0x830 [ 34.160931] ? snprintf+0xa5/0xd0 [ 34.168196] kobject_init_and_add+0xde/0x120 [ 34.171721] ? vsprintf+0x30/0x30 [ 34.174990] ? kobject_add_internal+0x830/0x830 [ 34.182243] ? set_blocksize+0x24b/0x2e0 [ 34.186027] ? vsnprintf+0x25e/0x1350 [ 34.190508] gfs2_mount+0x42a/0x4f3 [ 34.194977] gfs2_sys_fs_add+0x184/0x3f0 [ 34.199456] ? fill_super+0x22a0/0x22a0 [ 34.206369] ? recover_store+0x100/0x100 [ 34.210783] mount_fs+0x92/0x2a0 [ 34.214207] ? snprintf+0xa5/0xd0 [ 34.218855] vfs_kern_mount.part.0+0x5b/0x3c0 [ 34.223028] ? filemap_write_and_wait+0x7e/0xa0 [ 34.226812] do_mount+0x3c9/0x25e0 [ 34.230448] ? kill_bdev+0x7c/0xe0 [ 34.234488] ? copy_mount_string+0x40/0x40 [ 34.238482] ? memcpy+0x35/0x50 [ 34.243128] ? kmem_cache_alloc_trace+0x389/0x3f0 [ 34.246483] fill_super+0x11a9/0x22a0 [ 34.249912] ? copy_mnt_ns+0x8a0/0x8a0 [ 34.254477] ? gfs2_online_uevent+0x1b0/0x1b0 [ 34.259241] ? copy_mount_options+0x1ec/0x2e0 [ 34.262796] ? snprintf+0xa5/0xd0 [ 34.266344] ? copy_mnt_ns+0x8a0/0x8a0 [ 34.270570] ? vsprintf+0x30/0x30 [ 34.273911] SyS_mount+0xa8/0x120 [ 34.279773] ? set_blocksize+0x24b/0x2e0 [ 34.283566] ? copy_mnt_ns+0x8a0/0x8a0 [ 34.287455] gfs2_mount+0x42a/0x4f3 [ 34.291923] do_syscall_64+0x1d5/0x640 [ 34.296560] ? fill_super+0x22a0/0x22a0 [ 34.300007] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 34.303895] mount_fs+0x92/0x2a0 [ 34.307332] RIP: 0033:0x447bca [ 34.310782] vfs_kern_mount.part.0+0x5b/0x3c0 [ 34.315341] RSP: 002b:00007ffedf0079f8 EFLAGS: 00000293 [ 34.319210] do_mount+0x3c9/0x25e0 [ 34.322805] ORIG_RAX: 00000000000000a5 [ 34.326673] ? copy_mount_string+0x40/0x40 [ 34.330651] RAX: ffffffffffffffda RBX: 00007ffedf007a00 RCX: 0000000000447bca [ 34.335818] ? kmem_cache_alloc_trace+0x389/0x3f0 [ 34.339190] RDX: 00007ffedf007a00 RSI: 0000000020000040 RDI: 00007ffedf007a20 [ 34.342359] ? copy_mnt_ns+0x8a0/0x8a0 [ 34.346840] RBP: 0000000000000003 R08: 00007ffedf007a60 R09: 000000000000000a [ 34.352273] ? copy_mount_options+0x1ec/0x2e0 [ 34.355790] R10: 0000000000000000 R11: 0000000000000293 R12: 00007ffedf007a60 [ 34.360698] ? copy_mnt_ns+0x8a0/0x8a0 [ 34.364915] R13: 0000000000000004 R14: 0000000000000000 R15: 0000000000000000 [ 34.364928] Code: [ 34.372268] SyS_mount+0xa8/0x120 [ 34.377079] d5 [ 34.384374] ? copy_mnt_ns+0x8a0/0x8a0 [ 34.388234] 3e [ 34.395503] do_syscall_64+0x1d5/0x640 [ 34.400155] 8a e8 [ 34.407942] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 34.411886] b9 [ 34.419235] RIP: 0033:0x447bca [ 34.421369] 30 [ 34.424796] RSP: 002b:00007ffedf0079f8 EFLAGS: 00000293 [ 34.426658] dc [ 34.430691] ORIG_RAX: 00000000000000a5 [ 34.430697] RAX: ffffffffffffffda RBX: 00007ffedf007a00 RCX: 0000000000447bca [ 34.432584] ff [ 34.436448] RDX: 00007ffedf007a00 RSI: 0000000020000040 RDI: 00007ffedf007a20 [ 34.436453] RBP: 0000000000000003 R08: 00007ffedf007a60 R09: 000000000000000a [ 34.438576] eb [ 34.443841] R10: 0000000000000000 R11: 0000000000000293 R12: 00007ffedf007a60 [ 34.445727] d8 [ 34.448892] R13: 0000000000000004 R14: 0000000000000000 R15: 0000000000000000 [ 34.450755] e8 b2 30 dc ff e9 6d ff ff ff e8 78 ed b2 ff 4c 89 ea 48 89 ee 48 c7 c7 60 95 95 86 e8 61 cc a1 ff <0f> 0b 48 89 ef 5d 41 5c 41 5d e9 57 08 dc ff 90 90 90 90 90 90 [ 34.520197] ---[ end trace dd7a1ed5f3bee1e3 ]--- [ 34.526561] Kernel Offset: disabled [ 34.530245] Rebooting in 86400 seconds..