[ OK ] Started Daily apt download activities. [ OK ] Started Regular background program processing daemon. Starting OpenBSD Secure Shell server... [ OK ] Started Daily apt upgrade and clean activities. [ OK ] Reached target Timers. [ OK ] Started System Logging Service. [ OK ] Started Permit User Sessions. [ OK ] Started OpenBSD Secure Shell server. [ OK ] Found device /dev/ttyS0. [ 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 '10.128.0.48' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 73.802649][ T27] audit: type=1400 audit(1602402492.029:8): avc: denied { execmem } for pid=6913 comm="syz-executor712" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 73.829370][ T6914] REISERFS (device loop0): found reiserfs format "3.6" with standard journal [ 73.840283][ T6914] REISERFS (device loop0): using ordered data mode [ 73.847424][ T6914] reiserfs: using flush barriers [ 73.855634][ T6914] REISERFS (device loop0): journal params: device loop0, size 8192, journal first block 18, max trans len 1024, max batch 900, max commit age 30, max trans age 30 [ 73.874873][ T6914] REISERFS (device loop0): checking transaction log (loop0) [ 74.963683][ T6914] REISERFS (device loop0): Using tea hash to sort names [ 74.970916][ T6914] general protection fault, probably for non-canonical address 0xdffffc000000000d: 0000 [#1] PREEMPT SMP KASAN [ 74.982632][ T6914] KASAN: null-ptr-deref in range [0x0000000000000068-0x000000000000006f] [ 74.991394][ T6914] CPU: 1 PID: 6914 Comm: syz-executor712 Not tainted 5.9.0-rc8-syzkaller #0 [ 75.000060][ T6914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 75.010130][ T6914] RIP: 0010:open_xa_dir+0xf6/0x690 [ 75.015269][ T6914] Code: 48 c1 ea 03 80 3c 02 00 0f 85 d2 04 00 00 4c 8b ad 98 05 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8d 75 68 4c 89 f2 48 c1 ea 03 <80> 3c 02 00 0f 85 be 04 00 00 49 8b 6d 68 4c 89 04 24 48 85 ed 0f [ 75.034980][ T6914] RSP: 0018:ffffc900055c7770 EFLAGS: 00010202 [ 75.041029][ T6914] RAX: dffffc0000000000 RBX: ffff88808363c7e0 RCX: ffffffff820051fe [ 75.049093][ T6914] RDX: 000000000000000d RSI: ffffffff820027d6 RDI: ffff8880a695f598 [ 75.057079][ T6914] RBP: ffff8880a695f000 R08: ffff88808e77c668 R09: ffff88808363c7f7 [ 75.065051][ T6914] R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff92000ab8ef0 [ 75.073006][ T6914] R13: 0000000000000000 R14: 0000000000000068 R15: ffff88808e77c000 [ 75.080983][ T6914] FS: 0000000001903880(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000 [ 75.089997][ T6914] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 75.096586][ T6914] CR2: 000055eb19285160 CR3: 000000009ebd3000 CR4: 00000000001506e0 [ 75.104553][ T6914] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 75.112534][ T6914] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 75.120504][ T6914] Call Trace: [ 75.123795][ T6914] ? xattr_mkdir.constprop.0+0xd0/0xd0 [ 75.129250][ T6914] ? lock_is_held_type+0xbb/0xf0 [ 75.134179][ T6914] ? find_held_lock+0x2d/0x110 [ 75.138944][ T6914] ? get_cached_acl+0x3a9/0x520 [ 75.143787][ T6914] xattr_lookup+0x21/0x3c0 [ 75.148210][ T6914] ? reiserfs_set_acl+0x600/0x600 [ 75.153237][ T6914] reiserfs_xattr_get+0x9d/0x9a0 [ 75.158171][ T6914] ? get_cached_acl+0x3cb/0x520 [ 75.163006][ T6914] ? reiserfs_set_acl+0x600/0x600 [ 75.168010][ T6914] reiserfs_get_acl+0x57/0x660 [ 75.172757][ T6914] ? reiserfs_set_acl+0x600/0x600 [ 75.177778][ T6914] get_acl+0x15c/0x360 [ 75.181840][ T6914] generic_permission+0x437/0x550 [ 75.186866][ T6914] reiserfs_permission+0x64/0x80 [ 75.191786][ T6914] ? reiserfs_listxattr+0x2e0/0x2e0 [ 75.197079][ T6914] inode_permission.part.0+0x270/0x410 [ 75.202537][ T6914] lookup_one_len_common+0x279/0x3a0 [ 75.207815][ T6914] lookup_one_len+0xe6/0x190 [ 75.212400][ T6914] ? try_lookup_one_len+0x180/0x180 [ 75.217581][ T6914] ? down_write_killable+0x170/0x170 [ 75.222859][ T6914] reiserfs_lookup_privroot+0x92/0x280 [ 75.228509][ T6914] reiserfs_fill_super+0x211b/0x2df3 [ 75.233807][ T6914] ? reiserfs_remount+0x1580/0x1580 [ 75.239005][ T6914] ? lock_downgrade+0x830/0x830 [ 75.243838][ T6914] ? snprintf+0xbb/0xf0 [ 75.247993][ T6914] ? wait_for_completion+0x260/0x260 [ 75.253283][ T6914] ? set_blocksize+0x1c1/0x400 [ 75.258027][ T6914] mount_bdev+0x32e/0x3f0 [ 75.262338][ T6914] ? reiserfs_remount+0x1580/0x1580 [ 75.268472][ T6914] ? reiserfs_kill_sb+0x1e0/0x1e0 [ 75.273479][ T6914] legacy_get_tree+0x105/0x220 [ 75.278231][ T6914] vfs_get_tree+0x89/0x2f0 [ 75.282626][ T6914] path_mount+0x1387/0x20a0 [ 75.287124][ T6914] ? strncpy_from_user+0x2bf/0x3e0 [ 75.292233][ T6914] ? copy_mount_string+0x40/0x40 [ 75.297162][ T6914] ? getname_flags.part.0+0x1dd/0x4f0 [ 75.302512][ T6914] __x64_sys_mount+0x27f/0x300 [ 75.307273][ T6914] ? copy_mnt_ns+0xa60/0xa60 [ 75.311843][ T6914] ? check_preemption_disabled+0x50/0x130 [ 75.317808][ T6914] ? syscall_enter_from_user_mode+0x1d/0x60 [ 75.323742][ T6914] do_syscall_64+0x2d/0x70 [ 75.328157][ T6914] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 75.334030][ T6914] RIP: 0033:0x447dba [ 75.337964][ T6914] Code: b8 08 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 7d a3 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 5a a3 fb ff c3 66 0f 1f 84 00 00 00 00 00 [ 75.357556][ T6914] RSP: 002b:00007ffcdafc6378 EFLAGS: 00000297 ORIG_RAX: 00000000000000a5 [ 75.365962][ T6914] RAX: ffffffffffffffda RBX: 00007ffcdafc63d0 RCX: 0000000000447dba [ 75.374797][ T6914] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffcdafc6390 [ 75.382751][ T6914] RBP: 00007ffcdafc6390 R08: 00007ffcdafc63d0 R09: 0000000000000000 [ 75.390703][ T6914] R10: 0000000000010000 R11: 0000000000000297 R12: 0000000000000007 [ 75.398668][ T6914] R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003 [ 75.406635][ T6914] Modules linked in: [ 75.410672][ T6914] ---[ end trace e5eda099c5c4e9a8 ]--- [ 75.416190][ T6914] RIP: 0010:open_xa_dir+0xf6/0x690 [ 75.421303][ T6914] Code: 48 c1 ea 03 80 3c 02 00 0f 85 d2 04 00 00 4c 8b ad 98 05 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8d 75 68 4c 89 f2 48 c1 ea 03 <80> 3c 02 00 0f 85 be 04 00 00 49 8b 6d 68 4c 89 04 24 48 85 ed 0f [ 75.440967][ T6914] RSP: 0018:ffffc900055c7770 EFLAGS: 00010202 [ 75.447118][ T6914] RAX: dffffc0000000000 RBX: ffff88808363c7e0 RCX: ffffffff820051fe [ 75.455144][ T6914] RDX: 000000000000000d RSI: ffffffff820027d6 RDI: ffff8880a695f598 [ 75.463186][ T6914] RBP: ffff8880a695f000 R08: ffff88808e77c668 R09: ffff88808363c7f7 [ 75.471328][ T6914] R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff92000ab8ef0 [ 75.479365][ T6914] R13: 0000000000000000 R14: 0000000000000068 R15: ffff88808e77c000 [ 75.487412][ T6914] FS: 0000000001903880(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000 [ 75.497296][ T6914] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 75.503935][ T6914] CR2: 000055eb19285160 CR3: 000000009ebd3000 CR4: 00000000001506e0 [ 75.512427][ T6914] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 75.521012][ T6914] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 75.529053][ T6914] Kernel panic - not syncing: Fatal exception [ 75.536298][ T6914] Kernel Offset: disabled [ 75.540630][ T6914] Rebooting in 86400 seconds..