[ 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 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... 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 '10.128.0.69' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 69.441213][ T7053] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 69.442228][ T7057] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 69.452516][ T7052] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 69.462295][ T7057] minix_free_inode: bit 1 already cleared [ 69.485609][ T7052] minix_free_inode: bit 1 already cleared [ 69.497422][ T7066] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 69.512136][ T7053] minix_free_inode: bit 1 already cleared [ 69.517992][ T7066] minix_free_inode: bit 1 already cleared [ 69.526937][ T7062] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 69.537171][ T7062] minix_free_inode: bit 1 already cleared [ 69.537212][ T7061] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 69.552555][ T7061] minix_free_inode: bit 1 already cleared [ 69.806718][ T7066] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 69.823967][ T7077] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 69.835780][ T7077] minix_free_inode: bit 1 already cleared [ 69.845726][ T7076] MINIX-fs: mounting unchecked file system, running fsck is recommended executing program executing program [ 69.857190][ T7081] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 69.859549][ T7080] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 69.881895][ T7076] minix_free_inode: bit 1 already cleared [ 69.887766][ T7066] minix_free_inode: bit 1 already cleared [ 69.893671][ T7081] minix_free_inode: bit 1 already cleared [ 69.927270][ T7107] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 69.931795][ T7080] minix_free_inode: bit 1 already cleared [ 69.958474][ T7107] minix_free_inode: bit 1 already cleared executing program executing program executing program executing program executing program executing program [ 70.383970][ T7122] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 70.403665][ T7135] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 70.412442][ T7122] minix_free_inode: bit 1 already cleared [ 70.423364][ T7139] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 70.433123][ T7137] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 70.447798][ T7138] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 70.456570][ T7139] minix_free_inode: bit 1 already cleared [ 70.465888][ T7138] minix_free_inode: bit 1 already cleared [ 70.471732][ T7137] minix_free_inode: bit 1 already cleared [ 70.478466][ T7140] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 70.479006][ T7135] minix_free_inode: bit 1 already cleared [ 70.493258][ T7140] minix_free_inode: bit 1 already cleared executing program [ 70.743164][ T7152] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 70.757651][ T7155] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 70.758003][ T7156] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 70.766369][ T7155] minix_free_inode: bit 1 already cleared [ 70.780564][ T7152] minix_free_inode: bit 1 already cleared [ 70.784349][ T7153] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 70.796063][ T7157] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 70.797595][ T7153] minix_free_inode: bit 1 already cleared [ 70.811641][ T7157] minix_free_inode: bit 1 already cleared [ 70.819993][ T7170] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 70.833626][ T7170] minix_free_inode: bit 1 already cleared [ 70.841334][ T7156] minix_free_inode: bit 1 already cleared executing program executing program executing program executing program executing program [ 71.347302][ T7190] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 71.370004][ T7190] minix_free_inode: bit 1 already cleared executing program [ 71.425710][ T7193] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 71.463389][ T7202] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 71.464539][ T7209] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 71.482099][ T7202] minix_free_inode: bit 1 already cleared [ 71.509423][ T7208] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 71.529717][ T7209] minix_free_inode: bit 1 already cleared [ 71.542612][ T7206] ================================================================== [ 71.543835][ T7198] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 71.551916][ T7206] BUG: KASAN: null-ptr-deref in get_block+0x657/0x1380 [ 71.551935][ T7206] Write of size 8 at addr 0000000000000000 by task syz-executor819/7206 [ 71.551939][ T7206] [ 71.551953][ T7206] CPU: 1 PID: 7206 Comm: syz-executor819 Not tainted 5.6.0-syzkaller #0 [ 71.551960][ T7206] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 71.551965][ T7206] Call Trace: [ 71.551983][ T7206] dump_stack+0x188/0x20d [ 71.551998][ T7206] ? get_block+0x657/0x1380 [ 71.552016][ T7206] __kasan_report.cold+0x5/0x4d [ 71.552034][ T7206] ? get_block+0x657/0x1380 [ 71.552050][ T7206] ? get_block+0x657/0x1380 [ 71.552062][ T7206] kasan_report+0x33/0x50 [ 71.552081][ T7206] check_memory_region+0x141/0x190 [ 71.552094][ T7206] get_block+0x657/0x1380 [ 71.552121][ T7206] ? block_to_path.isra.0+0x300/0x300 [ 71.560577][ T7222] MINIX-fs: mounting unchecked file system, running fsck is recommended [ 71.567271][ T7206] ? mark_buffer_write_io_error+0x180/0x180 [ 71.567298][ T7206] ? create_empty_buffers+0x590/0x8c0 [ 71.567319][ T7206] ? __alloc_pages_nodemask+0x5f4/0x810 [ 71.591453][ T7222] minix_free_inode: bit 1 already cleared [ 71.596473][ T7206] ? do_raw_spin_unlock+0x171/0x260 [ 71.596492][ T7206] minix_get_block+0xe5/0x110 [ 71.596512][ T7206] __block_write_begin_int+0x490/0x1b00 [ 71.602367][ T7198] minix_free_inode: bit 1 already cleared [ 71.604118][ T7206] ? minix_rename+0x8c0/0x8c0 [ 71.604152][ T7206] ? remove_inode_buffers+0x1c0/0x1c0 [ 71.703551][ T7208] minix_free_inode: bit 1 already cleared [ 71.703814][ T7206] ? pagecache_get_page+0x204/0xa10 [ 71.715363][ T7206] ? balance_dirty_pages_ratelimited+0x160/0x1d50 [ 71.721787][ T7206] ? wait_for_stable_page+0x11c/0x1e0 [ 71.727164][ T7206] ? minix_rename+0x8c0/0x8c0 [ 71.731854][ T7206] block_write_begin+0x58/0x2e0 [ 71.736696][ T7206] minix_write_begin+0x35/0xe0 [ 71.741462][ T7206] generic_perform_write+0x20a/0x4e0 [ 71.746751][ T7206] ? trace_event_raw_event_file_check_and_advance_wb_err+0x4a0/0x4a0 [ 71.754814][ T7206] ? update_time+0xc0/0xc0 [ 71.759227][ T7206] ? down_write+0xdb/0x150 [ 71.763634][ T7206] __generic_file_write_iter+0x24c/0x610 [ 71.769268][ T7206] generic_file_write_iter+0x3f3/0x630 [ 71.774730][ T7206] ? __generic_file_write_iter+0x610/0x610 [ 71.780523][ T7206] ? mark_held_locks+0xe0/0xe0 [ 71.785298][ T7206] new_sync_write+0x4a2/0x700 [ 71.789967][ T7206] ? new_sync_read+0x7a0/0x7a0 [ 71.794764][ T7206] ? rcu_read_lock_any_held+0xcd/0xf0 [ 71.800127][ T7206] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 71.805402][ T7206] __vfs_write+0xc9/0x100 [ 71.809729][ T7206] vfs_write+0x268/0x5d0 [ 71.813962][ T7206] ksys_write+0x12d/0x250 [ 71.818282][ T7206] ? __ia32_sys_read+0xb0/0xb0 [ 71.823554][ T7206] ? fpregs_mark_activate+0x320/0x320 [ 71.828913][ T7206] ? trace_hardirqs_off_caller+0x55/0x230 [ 71.834623][ T7206] do_syscall_64+0xf6/0x7d0 [ 71.839129][ T7206] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 71.845008][ T7206] RIP: 0033:0x44b209 [ 71.848888][ T7206] Code: 5d ca 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 2b ca fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 71.868585][ T7206] RSP: 002b:00007fc278340ce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 71.877069][ T7206] RAX: ffffffffffffffda RBX: 00000000006ddc38 RCX: 000000000044b209 [ 71.885028][ T7206] RDX: 000000000000fdef RSI: 00000000200004c0 RDI: 0000000000000003 [ 71.892983][ T7206] RBP: 00000000006ddc30 R08: 0000000000000012 R09: 0000000000000000 [ 71.900948][ T7206] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006ddc3c [ 71.908913][ T7206] R13: 00007fffac48537f R14: 00007fc2783419c0 R15: 0000000000000001 [ 71.916893][ T7206] ================================================================== [ 71.924935][ T7206] Disabling lock debugging due to kernel taint [ 71.941282][ T7206] Kernel panic - not syncing: panic_on_warn set ... [ 71.947897][ T7206] CPU: 1 PID: 7206 Comm: syz-executor819 Tainted: G B 5.6.0-syzkaller #0 [ 71.957598][ T7206] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 71.967646][ T7206] Call Trace: [ 71.970941][ T7206] dump_stack+0x188/0x20d [ 71.975288][ T7206] panic+0x2e3/0x75c [ 71.979191][ T7206] ? add_taint.cold+0x16/0x16 [ 71.983872][ T7206] ? preempt_schedule_common+0x5e/0xc0 [ 71.989332][ T7206] ? get_block+0x657/0x1380 [ 71.994893][ T7206] ? preempt_schedule_thunk+0x16/0x18 [ 72.000247][ T7206] ? trace_hardirqs_on+0x55/0x220 [ 72.005261][ T7206] ? get_block+0x657/0x1380 [ 72.009762][ T7206] end_report+0x4d/0x53 [ 72.013897][ T7206] __kasan_report.cold+0xd/0x4d [ 72.018728][ T7206] ? get_block+0x657/0x1380 [ 72.023211][ T7206] ? get_block+0x657/0x1380 [ 72.027691][ T7206] kasan_report+0x33/0x50 [ 72.032006][ T7206] check_memory_region+0x141/0x190 [ 72.037094][ T7206] get_block+0x657/0x1380 [ 72.041404][ T7206] ? block_to_path.isra.0+0x300/0x300 [ 72.046754][ T7206] ? mark_buffer_write_io_error+0x180/0x180 [ 72.052635][ T7206] ? create_empty_buffers+0x590/0x8c0 [ 72.057982][ T7206] ? __alloc_pages_nodemask+0x5f4/0x810 [ 72.063505][ T7206] ? do_raw_spin_unlock+0x171/0x260 [ 72.069041][ T7206] minix_get_block+0xe5/0x110 [ 72.073705][ T7206] __block_write_begin_int+0x490/0x1b00 [ 72.079226][ T7206] ? minix_rename+0x8c0/0x8c0 [ 72.083893][ T7206] ? remove_inode_buffers+0x1c0/0x1c0 [ 72.089326][ T7206] ? pagecache_get_page+0x204/0xa10 [ 72.094513][ T7206] ? balance_dirty_pages_ratelimited+0x160/0x1d50 [ 72.102731][ T7206] ? wait_for_stable_page+0x11c/0x1e0 [ 72.108084][ T7206] ? minix_rename+0x8c0/0x8c0 [ 72.112738][ T7206] block_write_begin+0x58/0x2e0 [ 72.117587][ T7206] minix_write_begin+0x35/0xe0 [ 72.122337][ T7206] generic_perform_write+0x20a/0x4e0 [ 72.127609][ T7206] ? trace_event_raw_event_file_check_and_advance_wb_err+0x4a0/0x4a0 [ 72.135652][ T7206] ? update_time+0xc0/0xc0 [ 72.140065][ T7206] ? down_write+0xdb/0x150 [ 72.144462][ T7206] __generic_file_write_iter+0x24c/0x610 [ 72.150071][ T7206] generic_file_write_iter+0x3f3/0x630 [ 72.155507][ T7206] ? __generic_file_write_iter+0x610/0x610 [ 72.161301][ T7206] ? mark_held_locks+0xe0/0xe0 [ 72.166056][ T7206] new_sync_write+0x4a2/0x700 [ 72.170711][ T7206] ? new_sync_read+0x7a0/0x7a0 [ 72.175455][ T7206] ? rcu_read_lock_any_held+0xcd/0xf0 [ 72.180804][ T7206] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 72.186067][ T7206] __vfs_write+0xc9/0x100 [ 72.190376][ T7206] vfs_write+0x268/0x5d0 [ 72.194595][ T7206] ksys_write+0x12d/0x250 [ 72.198903][ T7206] ? __ia32_sys_read+0xb0/0xb0 [ 72.203655][ T7206] ? fpregs_mark_activate+0x320/0x320 [ 72.209002][ T7206] ? trace_hardirqs_off_caller+0x55/0x230 [ 72.214701][ T7206] do_syscall_64+0xf6/0x7d0 [ 72.219183][ T7206] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 72.225062][ T7206] RIP: 0033:0x44b209 [ 72.228942][ T7206] Code: 5d ca 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 2b ca fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 72.248529][ T7206] RSP: 002b:00007fc278340ce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 72.256929][ T7206] RAX: ffffffffffffffda RBX: 00000000006ddc38 RCX: 000000000044b209 [ 72.264883][ T7206] RDX: 000000000000fdef RSI: 00000000200004c0 RDI: 0000000000000003 [ 72.272833][ T7206] RBP: 00000000006ddc30 R08: 0000000000000012 R09: 0000000000000000 [ 72.280794][ T7206] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006ddc3c [ 72.288753][ T7206] R13: 00007fffac48537f R14: 00007fc2783419c0 R15: 0000000000000001 [ 72.298104][ T7206] Kernel Offset: disabled [ 72.302435][ T7206] Rebooting in 86400 seconds..