[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.184' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 717.679290] INFO: task syz-executor241:8077 blocked for more than 140 seconds. [ 717.686724] Not tainted 4.19.211-syzkaller #0 [ 717.693182] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 717.701453] syz-executor241 D27664 8077 8075 0x00000004 [ 717.707092] Call Trace: [ 717.709731] __schedule+0x887/0x2040 [ 717.713532] ? io_schedule_timeout+0x140/0x140 [ 717.718096] ? _raw_spin_unlock+0x29/0x40 [ 717.722385] schedule+0x8d/0x1b0 [ 717.725751] fuse_wait_on_page_writeback.isra.0+0x11b/0x170 [ 717.731502] ? fuse_do_ioctl+0x1850/0x1850 [ 717.735735] ? wait_woken+0x250/0x250 [ 717.739590] ? fuse_writepage_locked+0xb63/0x1010 [ 717.744433] ? fuse_writepage_locked+0x1010/0x1010 [ 717.749411] fuse_launder_page+0xb6/0xe0 [ 717.753475] invalidate_inode_pages2_range+0x795/0x1110 [ 717.758832] ? clear_shadow_entry+0x170/0x170 [ 717.763382] ? fuse_file_alloc+0x1d9/0x270 [ 717.767625] ? do_raw_spin_unlock+0x171/0x230 [ 717.772168] ? _raw_spin_unlock+0x29/0x40 [ 717.776318] ? fuse_do_open+0x1c4/0x500 [ 717.780352] fuse_finish_open+0x2e2/0x590 [ 717.784496] fuse_open_common+0x254/0x2c0 [ 717.788627] do_dentry_open+0x4aa/0x1160 [ 717.792757] ? fuse_open_common+0x2c0/0x2c0 [ 717.797098] ? inode_permission.part.0+0x10c/0x450 [ 717.802094] ? chown_common+0x550/0x550 [ 717.806071] ? inode_permission+0x3d/0x140 [ 717.810363] path_openat+0x793/0x2df0 [ 717.814166] ? path_lookupat+0x8d0/0x8d0 [ 717.818210] ? mark_held_locks+0xf0/0xf0 [ 717.822330] do_filp_open+0x18c/0x3f0 [ 717.826129] ? may_open_dev+0xf0/0xf0 [ 717.829977] ? lock_downgrade+0x720/0x720 [ 717.834120] ? lock_acquire+0x170/0x3c0 [ 717.838131] ? __alloc_fd+0x34/0x570 [ 717.841944] ? do_raw_spin_unlock+0x171/0x230 [ 717.846443] ? _raw_spin_unlock+0x29/0x40 [ 717.850634] ? __alloc_fd+0x28d/0x570 [ 717.854440] do_sys_open+0x3b3/0x520 [ 717.858137] ? filp_open+0x70/0x70 [ 717.861740] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 717.867108] ? trace_hardirqs_off_caller+0x6e/0x210 [ 717.872194] ? do_syscall_64+0x21/0x620 [ 717.876223] do_syscall_64+0xf9/0x620 [ 717.880088] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 717.885276] RIP: 0033:0x7f6fd6cca4c9 [ 717.888971] Code: Bad RIP value. [ 717.892369] RSP: 002b:00007f6fd6c7b2f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 [ 717.900139] RAX: ffffffffffffffda RBX: 00007f6fd6d5b4c0 RCX: 00007f6fd6cca4c9 [ 717.907397] RDX: 00007f6fd6cca4c9 RSI: 0000000000000000 RDI: 00000000200001c0 [ 717.914725] RBP: 00007f6fd6d28164 R08: 0000000000000000 R09: 0000000000000000 [ 717.922062] R10: 0000000000000000 R11: 0000000000000246 R12: 0030656c69662f2e [ 717.929366] R13: 00007f6fd6d24158 R14: 00007f6fd6d26160 R15: 00007f6fd6d5b4c8 [ 717.936653] [ 717.936653] Showing all locks held in the system: [ 717.943041] 1 lock held by khungtaskd/1570: [ 717.947344] #0: 000000006130e0cc (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 [ 717.956007] 2 locks held by syz-executor241/8077: [ 717.960901] #0: 000000001ad9a22c (sb_writers#11){.+.+}, at: mnt_want_write+0x3a/0xb0 [ 717.968871] #1: 000000005eeeb7a1 (&sb->s_type->i_mutex_key#17){+.+.}, at: fuse_open_common+0x1bc/0x2c0 [ 717.978447] [ 717.980145] ============================================= [ 717.980145] [ 717.987149] NMI backtrace for cpu 0 [ 717.990843] CPU: 0 PID: 1570 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 [ 717.998280] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 718.007623] Call Trace: [ 718.010198] dump_stack+0x1fc/0x2ef [ 718.013814] nmi_cpu_backtrace.cold+0x63/0xa2 [ 718.018290] ? lapic_can_unplug_cpu+0x80/0x80 [ 718.022764] nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 [ 718.028023] watchdog+0x991/0xe60 [ 718.031460] ? reset_hung_task_detector+0x30/0x30 [ 718.036283] kthread+0x33f/0x460 [ 718.039629] ? kthread_park+0x180/0x180 [ 718.043583] ret_from_fork+0x24/0x30 [ 718.047381] Sending NMI from CPU 0 to CPUs 1: [ 718.052416] NMI backtrace for cpu 1 [ 718.052422] CPU: 1 PID: 4681 Comm: systemd-journal Not tainted 4.19.211-syzkaller #0 [ 718.052428] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 718.052432] RIP: 0010:__kasan_slab_free+0x3d/0x1f0 [ 718.052443] Code: cb 48 81 ec 18 02 00 00 e8 b0 0d 93 ff 41 8b 75 14 48 ba 00 00 00 00 00 ea ff ff 48 c1 e8 0c 48 c1 e0 06 48 01 d0 48 8b 50 08 <48> 89 f7 48 8d 4a ff 83 e2 01 48 0f 45 c1 48 8b 48 28 4c 89 e0 48 [ 718.052447] RSP: 0018:ffff8880a1adfa38 EFLAGS: 00000082 [ 718.052455] RAX: ffffea0002bf7280 RBX: 0000000000000001 RCX: ffffffff812b5ec0 [ 718.052460] RDX: ffffea0002c0bb88 RSI: 0000000000001100 RDI: 0000000000000007 [ 718.052465] RBP: ffffffff81a6b5c1 R08: 0000000000000000 R09: 0000000000000000 [ 718.052470] R10: 0000000000000007 R11: 0000000000000000 R12: ffff8880afdca780 [ 718.052475] R13: ffff88823b843380 R14: ffff8880afdca780 R15: ffff8880a1adfd50 [ 718.052481] FS: 00007f69db3cd8c0(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 [ 718.052485] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 718.052490] CR2: 00007f69d879f000 CR3: 00000000a32ac000 CR4: 00000000003406e0 [ 718.052495] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 718.052500] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 718.052502] Call Trace: [ 718.052506] ? unlazy_walk+0x1a4/0x540 [ 718.052509] ? lock_downgrade+0x720/0x720 [ 718.052513] ? do_raw_spin_unlock+0x171/0x230 [ 718.052517] ? debug_check_no_obj_freed+0x201/0x490 [ 718.052521] ? lock_downgrade+0x720/0x720 [ 718.052524] ? lock_acquire+0x170/0x3c0 [ 718.052528] ? debug_check_no_obj_freed+0xb5/0x490 [ 718.052531] ? trace_hardirqs_off+0x64/0x200 [ 718.052535] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 718.052539] ? debug_check_no_obj_freed+0x201/0x490 [ 718.052542] ? putname+0xe1/0x120 [ 718.052546] kmem_cache_free+0x7f/0x260 [ 718.052549] putname+0xe1/0x120 [ 718.052552] filename_lookup+0x3d0/0x5a0 [ 718.052556] ? filename_parentat+0x590/0x590 [ 718.052559] ? __phys_addr_symbol+0x2c/0x70 [ 718.052563] ? __check_object_size+0x17b/0x3e0 [ 718.052567] ? getname_flags+0x25b/0x590 [ 718.052570] do_faccessat+0x248/0x7a0 [ 718.052574] ? __ia32_sys_fallocate+0x140/0x140 [ 718.052578] ? trace_hardirqs_off_caller+0x6e/0x210 [ 718.052581] ? do_syscall_64+0x21/0x620 [ 718.052585] do_syscall_64+0xf9/0x620 [ 718.052588] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 718.052592] RIP: 0033:0x7f69da6889c7 [ 718.052609] Code: 83 c4 08 48 3d 01 f0 ff ff 73 01 c3 48 8b 0d c8 d4 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 15 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a1 d4 2b 00 f7 d8 64 89 01 48 [ 718.052613] RSP: 002b:00007ffd36d53ba8 EFLAGS: 00000246 ORIG_RAX: 0000000000000015 [ 718.052622] RAX: ffffffffffffffda RBX: 00007ffd36d56ac0 RCX: 00007f69da6889c7 [ 718.052626] RDX: 00007f69db0f9a00 RSI: 0000000000000000 RDI: 000056274d6a99a3 [ 718.052631] RBP: 00007ffd36d53be0 R08: 0000000000000000 R09: 0000000000000000 [ 718.052636] R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000 [ 718.052641] R13: 0000000000000000 R14: 00007ffd36d56ac0 R15: 00007ffd36d540d0 [ 718.052923] Kernel panic - not syncing: hung_task: blocked tasks [ 718.352757] CPU: 0 PID: 1570 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 [ 718.360177] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 718.369503] Call Trace: [ 718.372075] dump_stack+0x1fc/0x2ef [ 718.375683] panic+0x26a/0x50e [ 718.378865] ? __warn_printk+0xf3/0xf3 [ 718.382733] ? _raw_spin_unlock_irqrestore+0x79/0xe0 [ 718.387815] ? cpumask_next+0x3c/0x40 [ 718.391593] ? printk_safe_flush+0xd6/0x120 [ 718.395892] ? watchdog+0x991/0xe60 [ 718.399499] ? nmi_trigger_cpumask_backtrace+0x15e/0x1f0 [ 718.404930] watchdog+0x9a2/0xe60 [ 718.408366] ? reset_hung_task_detector+0x30/0x30 [ 718.413188] kthread+0x33f/0x460 [ 718.416534] ? kthread_park+0x180/0x180 [ 718.420485] ret_from_fork+0x24/0x30 [ 718.424447] Kernel Offset: disabled [ 718.428065] Rebooting in 86400 seconds..