[ OK ] Reached target Basic System. Starting Permit User Sessions... [ OK ] Started Regular background program processing daemon. Starting getty on tty2-tty6 if dbus and logind are not available... Starting System Logging Service... Starting OpenBSD Secure Shell server... [ OK ] Started Permit User Sessions. [ OK ] Started System Logging Service. [ OK ] Started OpenBSD Secure Shell server. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. [ 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. Starting Load/Save RF Kill Switch Status... [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ 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 Load/Save RF Kill Switch Status. [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.35' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 71.562455][ T8454] loop0: detected capacity change from 0 to 252287 [ 71.576371][ T8454] REISERFS (device loop0): found reiserfs format "3.6" with non-standard journal [ 71.586827][ T8454] REISERFS (device loop0): using ordered data mode [ 71.594197][ T8454] reiserfs: using flush barriers [ 71.601568][ T8454] REISERFS (device loop0): journal params: device loop0, size 15748, journal first block 18, max trans len 1024, max batch 900, max commit age 30, max trans age 30 [ 71.627529][ T8454] REISERFS (device loop0): checking transaction log (loop0) [ 74.086690][ T8454] REISERFS (device loop0): Using tea hash to sort names [ 74.095958][ T8454] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 74.104038][ T8454] #PF: supervisor instruction fetch in kernel mode [ 74.110641][ T8454] #PF: error_code(0x0010) - not-present page [ 74.116813][ T8454] PGD 1d164067 P4D 1d164067 PUD 143aa067 PMD 0 [ 74.123241][ T8454] Oops: 0010 [#1] PREEMPT SMP KASAN [ 74.128439][ T8454] CPU: 0 PID: 8454 Comm: syz-executor105 Not tainted 5.13.0-rc2-next-20210518-syzkaller #0 [ 74.138500][ T8454] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 74.149004][ T8454] RIP: 0010:0x0 [ 74.152562][ T8454] Code: Unable to access opcode bytes at RIP 0xffffffffffffffd6. [ 74.160432][ T8454] RSP: 0018:ffffc9000163f908 EFLAGS: 00010246 [ 74.166497][ T8454] RAX: dffffc0000000000 RBX: 1ffff920002c7f24 RCX: 0000000000000000 [ 74.174567][ T8454] RDX: 0000000000000000 RSI: ffff8880353f85e0 RDI: ffff888039770190 [ 74.182935][ T8454] RBP: ffffffff899e4880 R08: 0000000000000000 R09: ffffffff909ffbff [ 74.190964][ T8454] R10: ffffffff81c99241 R11: 0000000000000000 R12: ffff8880353f85e0 [ 74.199050][ T8454] R13: ffff888039770190 R14: ffffc9000163fa98 R15: ffffc9000163f940 [ 74.207025][ T8454] FS: 000000000231e300(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 74.216104][ T8454] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 74.222965][ T8454] CR2: ffffffffffffffd6 CR3: 00000000169ad000 CR4: 00000000001506f0 [ 74.231093][ T8454] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 74.239237][ T8454] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 74.247212][ T8454] Call Trace: [ 74.250487][ T8454] __lookup_slow+0x24c/0x480 [ 74.255100][ T8454] ? page_put_link+0x220/0x220 [ 74.259881][ T8454] ? __d_lookup+0x400/0x720 [ 74.264845][ T8454] ? __sanitizer_cov_trace_cmp4+0x1c/0x70 [ 74.270716][ T8454] ? d_lookup+0x101/0x170 [ 74.275096][ T8454] lookup_one_len+0x163/0x190 [ 74.279867][ T8454] ? try_lookup_one_len+0x180/0x180 [ 74.285099][ T8454] ? down_write_killable+0x170/0x170 [ 74.290418][ T8454] reiserfs_lookup_privroot+0x92/0x280 [ 74.295886][ T8454] reiserfs_fill_super+0x2124/0x2e00 [ 74.301297][ T8454] ? reiserfs_remount+0x1580/0x1580 [ 74.306697][ T8454] ? lock_downgrade+0x6e0/0x6e0 [ 74.311574][ T8454] ? snprintf+0xbb/0xf0 [ 74.315934][ T8454] ? __sanitizer_cov_trace_cmp4+0x1c/0x70 [ 74.323669][ T8454] ? set_blocksize+0x1c1/0x3b0 [ 74.328441][ T8454] mount_bdev+0x34d/0x410 [ 74.332785][ T8454] ? reiserfs_remount+0x1580/0x1580 [ 74.337980][ T8454] ? reiserfs_kill_sb+0x1e0/0x1e0 [ 74.343003][ T8454] legacy_get_tree+0x105/0x220 [ 74.347767][ T8454] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 74.354010][ T8454] vfs_get_tree+0x89/0x2f0 [ 74.358436][ T8454] path_mount+0x132a/0x1fa0 [ 74.362952][ T8454] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 74.369194][ T8454] ? strncpy_from_user+0x2a0/0x3e0 [ 74.374307][ T8454] ? finish_automount+0xaf0/0xaf0 [ 74.379883][ T8454] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 74.386151][ T8454] ? getname_flags.part.0+0x1dd/0x4f0 [ 74.391580][ T8454] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 74.397835][ T8454] __x64_sys_mount+0x27f/0x300 [ 74.402612][ T8454] ? copy_mnt_ns+0xae0/0xae0 [ 74.407235][ T8454] ? syscall_enter_from_user_mode+0x21/0x70 [ 74.413254][ T8454] do_syscall_64+0x31/0xb0 [ 74.417782][ T8454] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 74.423683][ T8454] RIP: 0033:0x445b6a [ 74.427582][ T8454] Code: 48 c7 c2 c0 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 a8 00 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 [ 74.448066][ T8454] RSP: 002b:00007ffdfe200cf8 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 [ 74.456480][ T8454] RAX: ffffffffffffffda RBX: 00007ffdfe200d50 RCX: 0000000000445b6a [ 74.464770][ T8454] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffdfe200d10 [ 74.473198][ T8454] RBP: 00007ffdfe200d10 R08: 00007ffdfe200d50 R09: 0000000000000000 [ 74.481544][ T8454] R10: 0000000000000000 R11: 0000000000000286 R12: 00000000200002a8 [ 74.489618][ T8454] R13: 0000000000000003 R14: 0000000000000004 R15: 0000000000000007 [ 74.497808][ T8454] Modules linked in: [ 74.501696][ T8454] CR2: 0000000000000000 [ 74.506141][ T8454] ---[ end trace 23e9a8ddc3d2104a ]--- [ 74.511615][ T8454] RIP: 0010:0x0 [ 74.515257][ T8454] Code: Unable to access opcode bytes at RIP 0xffffffffffffffd6. [ 74.523277][ T8454] RSP: 0018:ffffc9000163f908 EFLAGS: 00010246 [ 74.529365][ T8454] RAX: dffffc0000000000 RBX: 1ffff920002c7f24 RCX: 0000000000000000 [ 74.537445][ T8454] RDX: 0000000000000000 RSI: ffff8880353f85e0 RDI: ffff888039770190 [ 74.545612][ T8454] RBP: ffffffff899e4880 R08: 0000000000000000 R09: ffffffff909ffbff [ 74.553587][ T8454] R10: ffffffff81c99241 R11: 0000000000000000 R12: ffff8880353f85e0 [ 74.561554][ T8454] R13: ffff888039770190 R14: ffffc9000163fa98 R15: ffffc9000163f940 [ 74.569729][ T8454] FS: 000000000231e300(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 74.578681][ T8454] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 74.585283][ T8454] CR2: ffffffffffffffd6 CR3: 00000000169ad000 CR4: 00000000001506f0 [ 74.593252][ T8454] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 74.601414][ T8454] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 74.609737][ T8454] Kernel panic - not syncing: Fatal exception [ 74.616921][ T8454] Kernel Offset: disabled [ 74.621262][ T8454] Rebooting in 86400 seconds..