Starting getty on tty2-tty6 if dbus and logind are not available... Starting OpenBSD Secure Shell server... [ OK ] Started Daily apt upgrade and clean activities. [ OK ] Reached target Timers. Starting Permit User Sessions... [ OK ] Started System Logging Service. [ OK ] Found device /dev/ttyS0. [ OK ] Started Permit User Sessions. [ OK ] Started OpenBSD Secure Shell server. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. [ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. [ OK ] Started Getty on tty6. [ OK ] Started Getty on tty5. [ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.111' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 70.273303][ T34] audit: type=1400 audit(1607005413.293:8): avc: denied { execmem } for pid=8495 comm="syz-executor198" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 70.301318][ T8495] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue [ 70.335264][ T8495] Quota error (device loop0): qtree_write_dquot: Error -669470953 occurred while creating quota [ 70.353553][ T8495] Quota error (device loop0): qtree_write_dquot: Error -1224736762 occurred while creating quota [ 70.364338][ T8495] EXT4-fs error (device loop0): __ext4_new_inode:1067: comm syz-executor198: reserved inode found cleared - inode=1 [ 70.382497][ T8495] BUG: unable to handle page fault for address: fffffbfff6e00022 [ 70.390210][ T8495] #PF: supervisor read access in kernel mode [ 70.396177][ T8495] #PF: error_code(0x0000) - not-present page [ 70.402138][ T8495] PGD 23ffe9067 P4D 23ffe9067 PUD 23ffe8067 PMD 0 [ 70.408658][ T8495] Oops: 0000 [#1] PREEMPT SMP KASAN [ 70.413832][ T8495] CPU: 0 PID: 8495 Comm: syz-executor198 Not tainted 5.10.0-rc6-syzkaller #0 [ 70.422558][ T8495] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 70.432651][ T8495] RIP: 0010:check_memory_region+0xdb/0x180 [ 70.438454][ T8495] Code: 80 38 00 74 f2 48 89 c2 b8 01 00 00 00 48 85 d2 75 56 5b 5d 41 5c c3 48 85 d2 74 5e 48 01 ea eb 09 48 83 c0 01 48 39 d0 74 50 <80> 38 00 74 f2 eb d4 41 bc 08 00 00 00 48 89 ea 45 29 dc 4d 8d 1c [ 70.458163][ T8495] RSP: 0018:ffffc9000182f6b0 EFLAGS: 00010286 [ 70.464207][ T8495] RAX: fffffbfff6e00022 RBX: fffffbfff6e00024 RCX: ffffffff81df99ff [ 70.472165][ T8495] RDX: fffffbfff6e00024 RSI: 0000000000000004 RDI: ffffffffb7000116 [ 70.480148][ T8495] RBP: fffffbfff6e00022 R08: 0000000000000000 R09: ffffffffb7000119 [ 70.488095][ T8495] R10: fffffbfff6e00023 R11: 0000000000000000 R12: ffffffffb7000136 [ 70.496047][ T8495] R13: ffffffffb7000116 R14: 0000000000000009 R15: 1ffffffff6e00022 [ 70.504044][ T8495] FS: 0000000002062880(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 [ 70.512960][ T8495] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 70.519518][ T8495] CR2: fffffbfff6e00022 CR3: 0000000013487000 CR4: 00000000001506f0 [ 70.527465][ T8495] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 70.535420][ T8495] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 70.543382][ T8495] Call Trace: [ 70.546696][ T8495] dqput.part.0+0xaf/0x870 [ 70.551129][ T8495] __dquot_drop+0x19c/0x270 [ 70.555607][ T8495] ? dquot_get_next_dqblk+0x180/0x180 [ 70.560954][ T8495] ? ext4_mark_group_bitmap_corrupted+0x52e/0x6b0 [ 70.567337][ T8495] dquot_drop+0x14b/0x1a0 [ 70.571638][ T8495] __ext4_new_inode+0x2ba6/0x5520 [ 70.576642][ T8495] ? ext4_mark_inode_used+0x14a0/0x14a0 [ 70.582159][ T8495] ? dquot_initialize_needed+0x290/0x290 [ 70.587768][ T8495] ext4_tmpfile+0x208/0x480 [ 70.592266][ T8495] ? ext4_orphan_add+0xb90/0xb90 [ 70.597191][ T8495] ? _raw_spin_unlock+0x24/0x40 [ 70.602016][ T8495] ? d_alloc+0x1bc/0x230 [ 70.606232][ T8495] vfs_tmpfile+0x201/0x380 [ 70.610622][ T8495] path_openat+0x1667/0x2730 [ 70.615198][ T8495] ? path_lookupat+0x830/0x830 [ 70.619940][ T8495] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 70.625890][ T8495] do_filp_open+0x17e/0x3c0 [ 70.630363][ T8495] ? may_open_dev+0xf0/0xf0 [ 70.634840][ T8495] ? do_raw_spin_lock+0x120/0x2b0 [ 70.639837][ T8495] ? rwlock_bug.part.0+0x90/0x90 [ 70.644746][ T8495] ? _raw_spin_unlock+0x24/0x40 [ 70.649567][ T8495] ? __alloc_fd+0x28d/0x600 [ 70.654042][ T8495] do_sys_openat2+0x16d/0x420 [ 70.658688][ T8495] ? find_held_lock+0x2d/0x110 [ 70.663421][ T8495] ? build_open_flags+0x650/0x650 [ 70.668415][ T8495] ? pick_file+0x129/0x1e0 [ 70.672801][ T8495] ? lock_downgrade+0x6d0/0x6d0 [ 70.677623][ T8495] __x64_sys_openat+0x13f/0x1f0 [ 70.682570][ T8495] ? __ia32_sys_open+0x1c0/0x1c0 [ 70.687483][ T8495] ? syscall_enter_from_user_mode+0x1d/0x50 [ 70.693348][ T8495] do_syscall_64+0x2d/0x70 [ 70.697738][ T8495] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 70.703605][ T8495] RIP: 0033:0x444969 [ 70.707476][ T8495] Code: 8d d7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 5b d7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 70.727056][ T8495] RSP: 002b:00007ffe29d9f1e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 [ 70.735441][ T8495] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 0000000000444969 [ 70.743385][ T8495] RDX: 0000000000410481 RSI: 0000000020000000 RDI: ffffffffffffff9c [ 70.751342][ T8495] RBP: 00000000006cf018 R08: 0000000000000000 R09: 0000000000000000 [ 70.759285][ T8495] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402550 [ 70.767229][ T8495] R13: 00000000004025e0 R14: 0000000000000000 R15: 0000000000000000 [ 70.775174][ T8495] Modules linked in: [ 70.779042][ T8495] CR2: fffffbfff6e00022 [ 70.783174][ T8495] ---[ end trace 6ff59004b1c6cfde ]--- [ 70.788609][ T8495] RIP: 0010:check_memory_region+0xdb/0x180 [ 70.794397][ T8495] Code: 80 38 00 74 f2 48 89 c2 b8 01 00 00 00 48 85 d2 75 56 5b 5d 41 5c c3 48 85 d2 74 5e 48 01 ea eb 09 48 83 c0 01 48 39 d0 74 50 <80> 38 00 74 f2 eb d4 41 bc 08 00 00 00 48 89 ea 45 29 dc 4d 8d 1c [ 70.813984][ T8495] RSP: 0018:ffffc9000182f6b0 EFLAGS: 00010286 [ 70.820020][ T8495] RAX: fffffbfff6e00022 RBX: fffffbfff6e00024 RCX: ffffffff81df99ff [ 70.827967][ T8495] RDX: fffffbfff6e00024 RSI: 0000000000000004 RDI: ffffffffb7000116 [ 70.835910][ T8495] RBP: fffffbfff6e00022 R08: 0000000000000000 R09: ffffffffb7000119 [ 70.843872][ T8495] R10: fffffbfff6e00023 R11: 0000000000000000 R12: ffffffffb7000136 [ 70.851836][ T8495] R13: ffffffffb7000116 R14: 0000000000000009 R15: 1ffffffff6e00022 [ 70.859779][ T8495] FS: 0000000002062880(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 [ 70.868679][ T8495] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 70.875236][ T8495] CR2: fffffbfff6e00022 CR3: 0000000013487000 CR4: 00000000001506f0 [ 70.883181][ T8495] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 70.891125][ T8495] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 70.899069][ T8495] Kernel panic - not syncing: Fatal exception [ 70.905731][ T8495] Kernel Offset: disabled [ 70.910038][ T8495] Rebooting in 86400 seconds..