[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty1. [ OK ] Started Getty on tty2. [ 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... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. [ 65.785892][ T22] ================================================================== [ 65.785903][ T22] BUG: KFENCE: use-after-free read in kvm_fastop_exception+0xf6a/0x1058 [ 65.785903][ T22] [ 65.785941][ T22] Use-after-free read at 0xffff88823bd3c020 (in kfence-#157): [ 65.785956][ T22] kvm_fastop_exception+0xf6a/0x1058 [ 65.785975][ T22] d_lookup+0xd8/0x170 [ 65.785997][ T22] lookup_dcache+0x1e/0x130 [ 65.786018][ T22] __lookup_hash+0x29/0x180 [ 65.786038][ T22] kern_path_locked+0x17e/0x320 [ 65.786061][ T22] handle_remove+0xa2/0x5fe [ 65.786085][ T22] devtmpfsd+0x1b9/0x2a3 [ 65.786104][ T22] kthread+0x3e5/0x4d0 [ 65.786125][ T22] ret_from_fork+0x1f/0x30 [ 65.786147][ T22] [ 65.786151][ T22] kfence-#157 [0xffff88823bd3c000-0xffff88823bd3cfff, size=4096, cache=names_cache] allocated by task 22: [ 65.786190][ T22] getname_kernel+0x4e/0x370 [ 65.786210][ T22] kern_path_locked+0x71/0x320 [ 65.786232][ T22] handle_remove+0xa2/0x5fe [ 65.786252][ T22] devtmpfsd+0x1b9/0x2a3 [ 65.786271][ T22] kthread+0x3e5/0x4d0 [ 65.786293][ T22] ret_from_fork+0x1f/0x30 [ 65.786313][ T22] [ 65.786313][ T22] freed by task 22: [ 65.786340][ T22] putname.part.0+0xe1/0x120 [ 65.786362][ T22] kern_path_locked+0xc2/0x320 [ 65.786386][ T22] handle_remove+0xa2/0x5fe [ 65.786409][ T22] devtmpfsd+0x1b9/0x2a3 [ 65.786428][ T22] kthread+0x3e5/0x4d0 [ 65.786456][ T22] ret_from_fork+0x1f/0x30 [ 65.786477][ T22] [ 65.786482][ T22] CPU: 0 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller #0 [ 65.786505][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.786518][ T22] RIP: 0010:kvm_fastop_exception+0xf6a/0x1058 [ 65.786542][ T22] Code: d3 ed e9 bf d2 6e f8 49 8d 0e 48 83 e1 f8 4c 8b 21 41 8d 0e 83 e1 07 c1 e1 03 49 d3 ec e9 15 e0 6e 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 05 ea 6e f8 bd [ 65.786562][ T22] RSP: 0018:ffffc90000dcfae8 EFLAGS: 00010282 [ 65.786582][ T22] RAX: 0000000036736376 RBX: ffff88806e58b068 RCX: ffff88823bd3c020 [ 65.786597][ T22] RDX: ffffed100dcb1614 RSI: 0000000000000004 RDI: 0000000000000007 [ 65.786611][ T22] RBP: 0000000000000004 R08: 0000000000000000 R09: ffff88806e58b098 [ 65.786625][ T22] R10: ffffed100dcb1613 R11: 0000000000000000 R12: ffff88823bd3c020 [ 65.786640][ T22] R13: ffff88823bd3c020 R14: ffff88806e58b098 R15: dffffc0000000000 [ 65.786656][ T22] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 65.786678][ T22] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 65.786694][ T22] CR2: ffff88823bd3c020 CR3: 0000000071c15000 CR4: 00000000001506f0 [ 65.786708][ T22] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 65.786721][ T22] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 65.786736][ T22] Call Trace: [ 65.786747][ T22] d_lookup+0xd8/0x170 [ 65.786772][ T22] lookup_dcache+0x1e/0x130 [ 65.786797][ T22] __lookup_hash+0x29/0x180 [ 65.786823][ T22] kern_path_locked+0x17e/0x320 [ 65.786850][ T22] ? filename_lookup+0x80/0x80 [ 65.786882][ T22] handle_remove+0xa2/0x5fe [ 65.786909][ T22] ? cacheinfo_cpu_online.cold+0x3e/0x3e [ 65.786957][ T22] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 65.786983][ T22] ? finish_task_switch.isra.0+0x232/0xa50 [ 65.787010][ T22] ? find_held_lock+0x2d/0x110 [ 65.787031][ T22] ? devtmpfsd+0xaa/0x2a3 [ 65.787052][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 65.787074][ T22] ? do_raw_spin_lock+0x120/0x2b0 [ 65.787099][ T22] ? rwlock_bug.part.0+0x90/0x90 [ 65.787126][ T22] devtmpfsd+0x1b9/0x2a3 [ 65.787150][ T22] ? dmar_validate_one_drhd+0x24d/0x24d [ 65.787176][ T22] kthread+0x3e5/0x4d0 [ 65.787199][ T22] ? set_kthread_struct+0x130/0x130 [ 65.787227][ T22] ret_from_fork+0x1f/0x30 [ 65.787257][ T22] ================================================================== [ 65.787265][ T22] Kernel panic - not syncing: panic_on_warn set ... [ 65.787537][ T22] CPU: 0 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller #0 [ 65.787561][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.787574][ T22] Call Trace: [ 65.787583][ T22] dump_stack_lvl+0xcd/0x134 [ 65.787610][ T22] panic+0x2b0/0x6dd [ 65.787633][ T22] ? __warn_printk+0xf3/0xf3 [ 65.787667][ T22] ? kfence_report_error.cold+0x2f3/0xa56 [ 65.787700][ T22] kfence_report_error.cold+0x304/0xa56 [ 65.787727][ T22] ? kvm_fastop_exception+0xf6a/0x1058 [ 65.787756][ T22] ? kfence_print_object+0x350/0x350 [ 65.787786][ T22] ? add_lock_to_list.constprop.0+0x185/0x370 [ 65.787810][ T22] ? kvm_fastop_exception+0xf6a/0x1058 [ 65.787832][ T22] ? d_lookup+0xd8/0x170 [ 65.787857][ T22] ? lookup_dcache+0x1e/0x130 [ 65.787882][ T22] ? __lookup_hash+0x29/0x180 [ 65.787906][ T22] ? kern_path_locked+0x17e/0x320 [ 65.787930][ T22] ? handle_remove+0xa2/0x5fe [ 65.787954][ T22] ? devtmpfsd+0x1b9/0x2a3 [ 65.787975][ T22] ? kthread+0x3e5/0x4d0 [ 65.787998][ T22] ? ret_from_fork+0x1f/0x30 [ 65.788071][ T22] ? mark_lock+0xef/0x17b0 [ 65.788110][ T22] kfence_handle_page_fault+0x203/0x630 [ 65.788145][ T22] page_fault_oops+0x1c5/0x6b0 [ 65.788170][ T22] ? __sanitizer_cov_trace_const_cmp2+0x22/0x80 [ 65.788200][ T22] ? is_prefetch.constprop.0+0xb7/0x530 [ 65.788225][ T22] ? dump_pagetable+0xc0/0xc0 [ 65.788250][ T22] ? pgtable_bad+0x90/0x90 [ 65.788278][ T22] ? search_bpf_extables+0x1d1/0x2f0 [ 65.788302][ T22] ? kvm_fastop_exception+0xf6a/0x1058 [ 65.788334][ T22] kernelmode_fixup_or_oops+0x219/0x280 [ 65.788365][ T22] __bad_area_nosemaphore+0x36d/0x400 [ 65.788391][ T22] ? spurious_kernel_fault+0x38d/0x5b0 [ 65.788422][ T22] do_kern_addr_fault+0x5b/0x70 [ 65.788456][ T22] exc_page_fault+0x155/0x180 [ 65.788483][ T22] asm_exc_page_fault+0x1e/0x30 [ 65.788509][ T22] RIP: 0010:kvm_fastop_exception+0xf6a/0x1058 [ 65.788533][ T22] Code: d3 ed e9 bf d2 6e f8 49 8d 0e 48 83 e1 f8 4c 8b 21 41 8d 0e 83 e1 07 c1 e1 03 49 d3 ec e9 15 e0 6e 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 05 ea 6e f8 bd [ 65.788554][ T22] RSP: 0018:ffffc90000dcfae8 EFLAGS: 00010282 [ 65.788575][ T22] RAX: 0000000036736376 RBX: ffff88806e58b068 RCX: ffff88823bd3c020 [ 65.788591][ T22] RDX: ffffed100dcb1614 RSI: 0000000000000004 RDI: 0000000000000007 [ 65.788606][ T22] RBP: 0000000000000004 R08: 0000000000000000 R09: ffff88806e58b098 [ 65.788621][ T22] R10: ffffed100dcb1613 R11: 0000000000000000 R12: ffff88823bd3c020 [ 65.788636][ T22] R13: ffff88823bd3c020 R14: ffff88806e58b098 R15: dffffc0000000000 [ 65.788666][ T22] ? __d_lookup+0x372/0x720 [ 65.788702][ T22] d_lookup+0xd8/0x170 [ 65.788730][ T22] lookup_dcache+0x1e/0x130 [ 65.788757][ T22] __lookup_hash+0x29/0x180 [ 65.788784][ T22] kern_path_locked+0x17e/0x320 [ 65.788811][ T22] ? filename_lookup+0x80/0x80 [ 65.788852][ T22] handle_remove+0xa2/0x5fe [ 65.788883][ T22] ? cacheinfo_cpu_online.cold+0x3e/0x3e [ 65.788918][ T22] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 65.788944][ T22] ? finish_task_switch.isra.0+0x232/0xa50 [ 65.788981][ T22] ? find_held_lock+0x2d/0x110 [ 65.789010][ T22] ? devtmpfsd+0xaa/0x2a3 [ 65.789034][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 65.789060][ T22] ? do_raw_spin_lock+0x120/0x2b0 [ 65.789087][ T22] ? rwlock_bug.part.0+0x90/0x90 [ 65.789126][ T22] devtmpfsd+0x1b9/0x2a3 [ 65.789155][ T22] ? dmar_validate_one_drhd+0x24d/0x24d [ 65.789186][ T22] kthread+0x3e5/0x4d0 [ 65.789213][ T22] ? set_kthread_struct+0x130/0x130 [ 65.789245][ T22] ret_from_fork+0x1f/0x30 [ 65.789699][ T22] Kernel Offset: disabled