[ 68.463089][ T6403] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 68.469036][ T6403] RIP: 0033:0x7fc618a1d840 [ 68.473564][ T6403] Code: 73 01 c3 48 8b 0d 68 77 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 89 bb 20 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 1e f6 ff ff 48 89 04 24 [ 68.494411][ T6403] RSP: 002b:00007ffdc9f64158 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 68.503151][ T6403] RAX: ffffffffffffffda RBX: 0000563b135599d0 RCX: 00007fc618a1d840 [ 68.511309][ T6403] RDX: 0000563b118d7fe3 RSI: 00000000000a0800 RDI: 0000563b1356b0d0 [ 68.519640][ T6403] RBP: 00007ffdc9f642d0 R08: 0000563b118d7670 R09: 0000000000000020 [ 68.527625][ T6403] R10: 0000563b118d7d0c R11: 0000000000000246 R12: 00007ffdc9f64220 [ 68.535871][ T6403] R13: 0000563b13559790 R14: 0000000000000003 R15: 000000000000000e [ 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 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. [ 81.224936][ T22] ================================================================== [ 81.224948][ T22] BUG: KFENCE: use-after-free read in kvm_fastop_exception+0xf6d/0x105b [ 81.224948][ T22] [ 81.224980][ T22] Use-after-free read at 0xffff88823bda0020 (in kfence-#207): [ 81.224996][ T22] kvm_fastop_exception+0xf6d/0x105b [ 81.225017][ T22] d_lookup+0xd8/0x170 [ 81.225036][ T22] lookup_dcache+0x1e/0x130 [ 81.225064][ T22] __lookup_hash+0x29/0x180 [ 81.225091][ T22] kern_path_locked+0x17e/0x320 [ 81.225113][ T22] handle_remove+0xa2/0x5fe [ 81.225142][ T22] devtmpfsd+0x1b9/0x2a3 [ 81.225166][ T22] kthread+0x3e5/0x4d0 [ 81.225190][ T22] ret_from_fork+0x1f/0x30 [ 81.225215][ T22] [ 81.225219][ T22] kfence-#207 [0xffff88823bda0000-0xffff88823bda0fff, size=4096, cache=names_cache] allocated by task 22: [ 81.225260][ T22] getname_kernel+0x4e/0x370 [ 81.225280][ T22] kern_path_locked+0x71/0x320 [ 81.225300][ T22] handle_remove+0xa2/0x5fe [ 81.225327][ T22] devtmpfsd+0x1b9/0x2a3 [ 81.225349][ T22] kthread+0x3e5/0x4d0 [ 81.225369][ T22] ret_from_fork+0x1f/0x30 [ 81.225390][ T22] [ 81.225390][ T22] freed by task 22: [ 81.225420][ T22] putname.part.0+0xe1/0x120 [ 81.225445][ T22] kern_path_locked+0xc2/0x320 [ 81.225464][ T22] handle_remove+0xa2/0x5fe [ 81.225489][ T22] devtmpfsd+0x1b9/0x2a3 [ 81.225511][ T22] kthread+0x3e5/0x4d0 [ 81.225531][ T22] ret_from_fork+0x1f/0x30 [ 81.225553][ T22] [ 81.225557][ T22] CPU: 1 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller #0 [ 81.225580][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 81.225594][ T22] RIP: 0010:kvm_fastop_exception+0xf6d/0x105b [ 81.225618][ T22] Code: d3 ed e9 bc a8 6c f8 49 8d 0e 48 83 e1 f8 4c 8b 21 41 8d 0e 83 e1 07 c1 e1 03 49 d3 ec e9 12 b6 6c f8 49 8d 4d 00 48 83 e1 f8 <4c> 8b 21 41 8d 4d 00 83 e1 07 c1 e1 03 49 d3 ec e9 02 c0 6c f8 bd [ 81.225640][ T22] RSP: 0018:ffffc90000fe7ae8 EFLAGS: 00010282 [ 81.225658][ T22] RAX: 0000003561736376 RBX: ffff88804085a568 RCX: ffff88823bda0020 [ 81.225674][ T22] RDX: ffffed100810b4b4 RSI: 0000000000000005 RDI: 0000000000000007 [ 81.225688][ T22] RBP: 0000000000000005 R08: 0000000000000000 R09: ffff88804085a598 [ 81.225702][ T22] R10: ffffed100810b4b3 R11: 0000000000000000 R12: ffff88823bda0020 [ 81.225718][ T22] R13: ffff88823bda0020 R14: ffff88804085a598 R15: dffffc0000000000 [ 81.225735][ T22] FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 81.225767][ T22] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 81.225782][ T22] CR2: ffff88823bda0020 CR3: 000000001974d000 CR4: 00000000001506e0 [ 81.225797][ T22] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 81.225810][ T22] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 81.225824][ T22] Call Trace: [ 81.225832][ T22] d_lookup+0xd8/0x170 [ 81.225851][ T22] lookup_dcache+0x1e/0x130 [ 81.225879][ T22] __lookup_hash+0x29/0x180 [ 81.225906][ T22] kern_path_locked+0x17e/0x320 [ 81.225927][ T22] ? filename_lookup+0x80/0x80 [ 81.225948][ T22] ? rcu_read_lock_sched_held+0xd/0x70 [ 81.225979][ T22] ? rcu_read_lock_sched_held+0xd/0x70 [ 81.226008][ T22] handle_remove+0xa2/0x5fe [ 81.226036][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 81.226058][ T22] ? cacheinfo_cpu_online.cold+0x3e/0x3e [ 81.226090][ T22] ? finish_task_switch.isra.0+0x232/0xa50 [ 81.226114][ T22] ? trace_hardirqs_on+0x5b/0x1c0 [ 81.226141][ T22] ? finish_task_switch.isra.0+0x232/0xa50 [ 81.226165][ T22] ? __switch_to+0x5cc/0x1060 [ 81.226189][ T22] ? rcu_read_lock_sched_held+0xd/0x70 [ 81.226217][ T22] ? lock_acquire+0x442/0x510 [ 81.226238][ T22] ? rcu_read_lock_sched_held+0xd/0x70 [ 81.226267][ T22] ? lock_release+0x522/0x720 [ 81.226288][ T22] ? devtmpfsd+0xaa/0x2a3 [ 81.226310][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 81.226333][ T22] ? do_raw_spin_lock+0x120/0x2b0 [ 81.226356][ T22] ? rwlock_bug.part.0+0x90/0x90 [ 81.226378][ T22] devtmpfsd+0x1b9/0x2a3 [ 81.226401][ T22] ? dmar_validate_one_drhd+0x24d/0x24d [ 81.226428][ T22] kthread+0x3e5/0x4d0 [ 81.226453][ T22] ? set_kthread_struct+0x130/0x130 [ 81.226478][ T22] ret_from_fork+0x1f/0x30 [ 81.226504][ T22] ================================================================== [ 81.226513][ T22] Kernel panic - not syncing: panic_on_warn set ... [ 81.226522][ T22] CPU: 1 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller #0 [ 81.226544][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 81.226556][ T22] Call Trace: [ 81.226562][ T22] dump_stack_lvl+0xcd/0x134 [ 81.226585][ T22] panic+0x306/0x73d [ 81.226607][ T22] ? __warn_printk+0xf3/0xf3 [ 81.226629][ T22] ? kfence_report_error.cold+0x2f3/0xa56 [ 81.226653][ T22] kfence_report_error.cold+0x304/0xa56 [ 81.226676][ T22] ? kvm_fastop_exception+0xf6d/0x105b [ 81.226699][ T22] ? deref_stack_reg+0xee/0x150 [ 81.226727][ T22] ? kfence_print_object+0x350/0x350 [ 81.226760][ T22] ? unwind_next_frame+0xec8/0x1ce0 [ 81.226786][ T22] ? kvm_fastop_exception+0xf6d/0x105b [ 81.226805][ T22] ? d_lookup+0xd8/0x170 [ 81.226824][ T22] ? lookup_dcache+0x1e/0x130 [ 81.226853][ T22] ? __lookup_hash+0x29/0x180 [ 81.226883][ T22] ? kern_path_locked+0x17e/0x320 [ 81.226906][ T22] ? handle_remove+0xa2/0x5fe [ 81.226936][ T22] ? devtmpfsd+0x1b9/0x2a3 [ 81.226960][ T22] ? kthread+0x3e5/0x4d0 [ 81.226985][ T22] ? ret_from_fork+0x1f/0x30 [ 81.227015][ T22] ? kasan_save_stack+0x32/0x40 [ 81.227039][ T22] ? kasan_save_stack+0x1b/0x40 [ 81.227064][ T22] kfence_handle_page_fault+0x203/0x630 [ 81.227096][ T22] ? __sanitizer_cov_trace_cmp8+0x1d/0x70 [ 81.227123][ T22] page_fault_oops+0x1c5/0x6b0 [ 81.227146][ T22] ? __sanitizer_cov_trace_const_cmp2+0x22/0x80 [ 81.227174][ T22] ? is_prefetch.constprop.0+0xb7/0x530 [ 81.227198][ T22] ? dump_pagetable+0xc0/0xc0 [ 81.227219][ T22] ? pgtable_bad+0x90/0x90 [ 81.227239][ T22] ? arch_stack_walk+0x5c/0xe0 [ 81.227260][ T22] ? search_module_extables+0xaf/0x100 [ 81.227289][ T22] ? search_exception_tables+0x33/0x50 [ 81.227313][ T22] kernelmode_fixup_or_oops+0x219/0x280 [ 81.227338][ T22] __bad_area_nosemaphore+0x36d/0x400 [ 81.227363][ T22] ? spurious_kernel_fault+0x38d/0x5b0 [ 81.227388][ T22] do_kern_addr_fault+0x5b/0x70 [ 81.227412][ T22] exc_page_fault+0x155/0x180 [ 81.227436][ T22] asm_exc_page_fault+0x1e/0x30 [ 81.227463][ T22] RIP: 0010:kvm_fastop_exception+0xf6d/0x105b [ 81.227489][ T22] Code: d3 ed e9 bc a8 6c f8 49 8d 0e 48 83 e1 f8 4c 8b 21 41 8d 0e 83 e1 07 c1 e1 03 49 d3 ec e9 12 b6 6c f8 49 8d 4d 00 48 83 e1 f8 <4c> 8b 21 41 8d 4d 00 83 e1 07 c1 e1 03 49 d3 ec e9 02 c0 6c f8 bd [ 81.227510][ T22] RSP: 0018:ffffc90000fe7ae8 EFLAGS: 00010282 [ 81.227530][ T22] RAX: 0000003561736376 RBX: ffff88804085a568 RCX: ffff88823bda0020 [ 81.227547][ T22] RDX: ffffed100810b4b4 RSI: 0000000000000005 RDI: 0000000000000007 [ 81.227562][ T22] RBP: 0000000000000005 R08: 0000000000000000 R09: ffff88804085a598 [ 81.227577][ T22] R10: ffffed100810b4b3 R11: 0000000000000000 R12: ffff88823bda0020 [ 81.227593][ T22] R13: ffff88823bda0020 R14: ffff88804085a598 R15: dffffc0000000000 [ 81.227611][ T22] ? __d_lookup+0x372/0x720 [ 81.227632][ T22] d_lookup+0xd8/0x170 [ 81.227652][ T22] lookup_dcache+0x1e/0x130 [ 81.227682][ T22] __lookup_hash+0x29/0x180 [ 81.227712][ T22] kern_path_locked+0x17e/0x320 [ 81.227735][ T22] ? filename_lookup+0x80/0x80 [ 81.227763][ T22] ? rcu_read_lock_sched_held+0xd/0x70 [ 81.227796][ T22] ? rcu_read_lock_sched_held+0xd/0x70 [ 81.227828][ T22] handle_remove+0xa2/0x5fe [ 81.227858][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 81.227881][ T22] ? cacheinfo_cpu_online.cold+0x3e/0x3e [ 81.227914][ T22] ? finish_task_switch.isra.0+0x232/0xa50 [ 81.227939][ T22] ? trace_hardirqs_on+0x5b/0x1c0 [ 81.227966][ T22] ? finish_task_switch.isra.0+0x232/0xa50 [ 81.227991][ T22] ? __switch_to+0x5cc/0x1060 [ 81.228015][ T22] ? rcu_read_lock_sched_held+0xd/0x70 [ 81.228047][ T22] ? lock_acquire+0x442/0x510 [ 81.228069][ T22] ? rcu_read_lock_sched_held+0xd/0x70 [ 81.228100][ T22] ? lock_release+0x522/0x720 [ 81.228122][ T22] ? devtmpfsd+0xaa/0x2a3 [ 81.228147][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 81.228170][ T22] ? do_raw_spin_lock+0x120/0x2b0 [ 81.228195][ T22] ? rwlock_bug.part.0+0x90/0x90 [ 81.228220][ T22] devtmpfsd+0x1b9/0x2a3 [ 81.228245][ T22] ? dmar_validate_one_drhd+0x24d/0x24d [ 81.228270][ T22] kthread+0x3e5/0x4d0 [ 81.228294][ T22] ? set_kthread_struct+0x130/0x130 [ 81.228320][ T22] ret_from_fork+0x1f/0x30 [ 81.228403][ T22] Kernel Offset: disabled