[ 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 syzkaller login: [ 31.100369] sshd (6200) used greatest stack depth: 23592 bytes left Warning: Permanently added '10.128.0.33' (ECDSA) to the list of known hosts. executing program [ 926.824237] audit: type=1400 audit(1602505581.861:8): avc: denied { execmem } for pid=6499 comm="syz-executor384" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 926.851816] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 926.860748] gfs2: fsid=syz:syz: Now mounting FS... [ 926.871928] gfs2: fsid=syz:syz.0: journal 0 mapped with 1 extents [ 926.882461] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 926.889633] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 927.152766] gfs2: fsid=syz:syz.0: jid=0: Done [ 927.158851] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 927.167366] kasan: CONFIG_KASAN_INLINE enabled [ 927.172065] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 927.179978] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 927.186221] CPU: 0 PID: 6499 Comm: syz-executor384 Not tainted 4.19.150-syzkaller #0 [ 927.194918] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 927.204414] RIP: 0010:gfs2_ri_update+0x289/0x520 [ 927.209341] Code: e0 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e 41 5f c3 e8 bc f9 44 fe 49 8d 7f 74 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 68 [ 927.228245] RSP: 0018:ffff888084b67638 EFLAGS: 00010203 [ 927.233605] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff832cd73b [ 927.240878] RDX: 000000000000000e RSI: ffffffff832cd8a4 RDI: 0000000000000074 [ 927.248213] RBP: ffff88808ccd1440 R08: 0000000000000000 R09: 0000000000000000 [ 927.255462] R10: 0000000000000005 R11: 0000000000000001 R12: 0000000000000001 [ 927.262725] R13: 0000000000000000 R14: ffff88808ccd143c R15: 0000000000000000 [ 927.269973] FS: 0000000001335880(0000) GS:ffff8880ae200000(0000) knlGS:0000000000000000 [ 927.278177] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 927.284035] CR2: 00007f7d4d6b4740 CR3: 0000000096198000 CR4: 00000000001406f0 [ 927.291311] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 927.298647] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 927.305907] Call Trace: [ 927.308478] gfs2_rindex_update+0x3ba/0x430 [ 927.312780] ? gfs2_ri_total+0x200/0x200 [ 927.316821] ? gfs2_rindex_update+0x29e/0x430 [ 927.321315] ? gfs2_lookupi+0x610/0x610 [ 927.325504] ? _raw_spin_unlock_irqrestore+0x7d/0xf0 [ 927.330593] init_inodes+0x10cb/0x1ee0 [ 927.334639] ? gfs2_mount_meta+0x2c0/0x2c0 [ 927.338961] ? vsprintf+0x30/0x30 [ 927.342408] ? check_journal_clean+0x230/0x230 [ 927.347016] ? __debugfs_create_file+0x356/0x4f0 [ 927.351758] fill_super+0x190e/0x2680 [ 927.355549] ? gfs2_online_uevent+0x1d0/0x1d0 [ 927.360028] ? gfs2_glock_nq_num+0xf9/0x240 [ 927.364331] ? snprintf+0xbb/0xf0 [ 927.367763] ? vsprintf+0x30/0x30 [ 927.371197] ? __mutex_add_waiter+0x160/0x160 [ 927.375740] ? set_blocksize+0x163/0x3f0 [ 927.379785] gfs2_mount+0x4c0/0x598 [ 927.383393] ? fill_super+0x2680/0x2680 [ 927.387651] mount_fs+0xa3/0x318 [ 927.391020] vfs_kern_mount.part.0+0x68/0x470 [ 927.395495] do_mount+0x51c/0x2f10 [ 927.399061] ? do_raw_spin_unlock+0x171/0x240 [ 927.403565] ? check_preemption_disabled+0x41/0x2b0 [ 927.408563] ? copy_mount_string+0x40/0x40 [ 927.413791] ? kmem_cache_alloc_trace+0x379/0x4b0 [ 927.418613] ? copy_mount_options+0x261/0x370 [ 927.423120] ksys_mount+0xcf/0x130 [ 927.426643] __x64_sys_mount+0xba/0x150 [ 927.430636] ? lockdep_hardirqs_on+0x3c1/0x5e0 [ 927.436488] do_syscall_64+0xf9/0x670 [ 927.440275] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 927.445446] RIP: 0033:0x45b73a [ 927.448622] Code: b8 08 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 fd ad fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 da ad fb ff c3 66 0f 1f 84 00 00 00 00 00 [ 927.467972] RSP: 002b:00007fff7ff01d28 EFLAGS: 00000293 ORIG_RAX: 00000000000000a5 [ 927.475658] RAX: ffffffffffffffda RBX: 00007fff7ff01d80 RCX: 000000000045b73a [ 927.482908] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fff7ff01d40 [ 927.490170] RBP: 00007fff7ff01d40 R08: 00007fff7ff01d80 R09: 00007fff00000015 [ 927.497432] R10: 0000000000000000 R11: 0000000000000293 R12: 000000000000091c [ 927.504681] R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003 [ 927.512106] Modules linked in: [ 927.515796] ---[ end trace b661299dace97eec ]--- [ 927.520565] RIP: 0010:gfs2_ri_update+0x289/0x520 [ 927.525366] Code: e0 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e 41 5f c3 e8 bc f9 44 fe 49 8d 7f 74 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 68 [ 927.544503] RSP: 0018:ffff888084b67638 EFLAGS: 00010203 [ 927.549901] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff832cd73b [ 927.557300] RDX: 000000000000000e RSI: ffffffff832cd8a4 RDI: 0000000000000074 [ 927.564554] RBP: ffff88808ccd1440 R08: 0000000000000000 R09: 0000000000000000 [ 927.571846] R10: 0000000000000005 R11: 0000000000000001 R12: 0000000000000001 [ 927.579150] R13: 0000000000000000 R14: ffff88808ccd143c R15: 0000000000000000 [ 927.586454] FS: 0000000001335880(0000) GS:ffff8880ae200000(0000) knlGS:0000000000000000 [ 927.595293] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 927.601171] CR2: 00007f7d4d6b4740 CR3: 0000000096198000 CR4: 00000000001406f0 [ 927.608466] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 927.615967] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 927.623229] Kernel panic - not syncing: Fatal exception [ 927.630093] Kernel Offset: disabled [ 927.633820] Rebooting in 86400 seconds..